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proxysql/lib/PgSQL_HostGroups_Manager.cpp

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#include "../deps/json/json.hpp"
using json = nlohmann::json;
#define PROXYJSON
#include "PgSQL_HostGroups_Manager.h"
#include "proxysql.h"
#include "cpp.h"
#include "PgSQL_PreparedStatement.h"
#include "PgSQL_Data_Stream.h"
#include <memory>
#include <pthread.h>
#include <string>
#include "prometheus/counter.h"
#include "prometheus/detail/builder.h"
#include "prometheus/family.h"
#include "prometheus/gauge.h"
#include "prometheus_helpers.h"
#include "proxysql_utils.h"
#define char_malloc (char *)malloc
#define itostr(__s, __i) { __s=char_malloc(32); sprintf(__s, "%lld", __i); }
#include "thread.h"
#include "wqueue.h"
#include "ev.h"
#include <functional>
#include <mutex>
#include <type_traits>
using std::function;
#ifdef TEST_AURORA
static unsigned long long array_mysrvc_total = 0;
static unsigned long long array_mysrvc_cands = 0;
#endif // TEST_AURORA
#define SAFE_SQLITE3_STEP(_stmt) do {\
do {\
rc=(*proxy_sqlite3_step)(_stmt);\
if (rc!=SQLITE_DONE) {\
assert(rc==SQLITE_LOCKED);\
usleep(100);\
}\
} while (rc!=SQLITE_DONE);\
} while (0)
extern ProxySQL_Admin *GloAdmin;
extern PgSQL_Threads_Handler *GloPTH;
extern MySQL_Monitor *GloMyMon;
class PgSQL_SrvConnList;
class PgSQL_SrvC;
class PgSQL_SrvList;
class PgSQL_HGC;
const int PgSQL_ERRORS_STATS_FIELD_NUM = 11;
/**
* @brief Helper function used to try to extract a value from the JSON field 'servers_defaults'.
*
* @param j JSON object constructed from 'servers_defaults' field.
* @param hid Hostgroup for which the 'servers_defaults' is defined in 'pgsql_hostgroup_attributes'. Used for
* error logging.
* @param key The key for the value to be extracted.
* @param val_check A validation function, checks if the value is within a expected range.
*
* @return The value extracted from the supplied JSON. In case of error '-1', and error cause is logged.
*/
template <typename T, typename std::enable_if<std::is_integral<T>::value, bool>::type = true>
T PgSQL_j_get_srv_default_int_val(
const json& j, uint32_t hid, const string& key, const function<bool(T)>& val_check
) {
if (j.find(key) != j.end()) {
const json::value_t val_type = j[key].type();
const char* type_name = j[key].type_name();
if (val_type == json::value_t::number_integer || val_type == json::value_t::number_unsigned) {
T val = j[key].get<T>();
if (val_check(val)) {
return val;
} else {
proxy_error(
"Invalid value %ld supplied for 'pgsql_hostgroup_attributes.servers_defaults.%s' for hostgroup %d."
" Value NOT UPDATED.\n",
static_cast<int64_t>(val), key.c_str(), hid
);
}
} else {
proxy_error(
"Invalid type '%s'(%hhu) supplied for 'pgsql_hostgroup_attributes.servers_defaults.%s' for hostgroup %d."
" Value NOT UPDATED.\n",
type_name, static_cast<std::uint8_t>(val_type), key.c_str(), hid
);
}
}
return static_cast<T>(-1);
}
PgSQL_Errors_stats::PgSQL_Errors_stats(int _hostgroup, const char* _hostname, int _port, const char* _username, const char* _address, const char* _dbname,
const char* _sqlstate, const char* _errmsg, time_t tn) {
hostgroup = _hostgroup;
if (_hostname) {
hostname = strdup(_hostname);
} else {
hostname = strdup((char*)"");
}
port = _port;
if (_username) {
username = strdup(_username);
} else {
username = strdup((char*)"");
}
if (_address) {
client_address = strdup(_address);
} else {
client_address = strdup((char*)"");
}
if (_dbname) {
dbname = strdup(_dbname);
} else {
dbname = strdup((char*)"");
}
if (_sqlstate) {
strncpy(sqlstate, _sqlstate, 5);
sqlstate[5] = '\0';
} else {
sqlstate[0] = '\0';
}
if (_errmsg) {
errmsg = strdup(_errmsg);
} else {
errmsg = strdup((char*)"");
}
last_seen = tn;
first_seen = tn;
count_star = 1;
}
PgSQL_Errors_stats::~PgSQL_Errors_stats() {
if (hostname) {
free(hostname);
hostname = NULL;
}
if (username) {
free(username);
username = NULL;
}
if (client_address) {
free(client_address);
client_address = NULL;
}
if (dbname) {
free(dbname);
dbname = NULL;
}
if (errmsg) {
free(errmsg);
errmsg = NULL;
}
}
char** PgSQL_Errors_stats::get_row() {
char buf[128];
char** pta = (char**)malloc(sizeof(char*) * PgSQL_ERRORS_STATS_FIELD_NUM);
sprintf(buf, "%d", hostgroup);
pta[0] = strdup(buf);
assert(hostname);
pta[1] = strdup(hostname);
sprintf(buf, "%d", port);
pta[2] = strdup(buf);
assert(username);
pta[3] = strdup(username);
assert(client_address);
pta[4] = strdup(client_address);
assert(dbname);
pta[5] = strdup(dbname);
pta[6] = strdup(sqlstate);
sprintf(buf, "%llu", count_star);
pta[7] = strdup(buf);
sprintf(buf, "%ld", first_seen);
pta[8] = strdup(buf);
sprintf(buf, "%ld", last_seen);
pta[9] = strdup(buf);
assert(errmsg);
pta[10] = strdup(errmsg);
return pta;
}
void PgSQL_Errors_stats::add_time(unsigned long long n, const char* le) {
count_star++;
if (first_seen == 0) {
first_seen = n;
}
last_seen = n;
if (strcmp(errmsg, le)) {
free(errmsg);
errmsg = strdup(le);
}
}
void PgSQL_Errors_stats::free_row(char** pta) {
int i;
for (i = 0; i < PgSQL_ERRORS_STATS_FIELD_NUM; i++) {
assert(pta[i]);
free(pta[i]);
}
free(pta);
}
PgSQL_Connection *PgSQL_SrvConnList::index(unsigned int _k) {
return (PgSQL_Connection *)conns->index(_k);
}
PgSQL_Connection * PgSQL_SrvConnList::remove(int _k) {
return (PgSQL_Connection *)conns->remove_index_fast(_k);
}
PgSQL_SrvConnList::PgSQL_SrvConnList(PgSQL_SrvC *_mysrvc) {
mysrvc=_mysrvc;
conns=new PtrArray();
}
void PgSQL_SrvConnList::add(PgSQL_Connection *c) {
conns->add(c);
}
PgSQL_SrvConnList::~PgSQL_SrvConnList() {
mysrvc=NULL;
while (conns_length()) {
PgSQL_Connection *conn=(PgSQL_Connection *)conns->remove_index_fast(0);
delete conn;
}
delete conns;
}
void PgSQL_SrvConnList::drop_all_connections() {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Dropping all connections (%u total) on PgSQL_SrvConnList %p for server %s:%d , hostgroup=%d , status=%d\n", conns_length(), this, mysrvc->address, mysrvc->port, mysrvc->myhgc->hid, mysrvc->status);
while (conns_length()) {
PgSQL_Connection *conn=(PgSQL_Connection *)conns->remove_index_fast(0);
delete conn;
}
}
PgSQL_SrvC::PgSQL_SrvC(
char* add, uint16_t p, int64_t _weight, enum MySerStatus _status, unsigned int _compression,
int64_t _max_connections, unsigned int _max_replication_lag, int32_t _use_ssl, unsigned int _max_latency_ms,
char* _comment
) {
address=strdup(add);
port=p;
weight=_weight;
status=_status;
compression=_compression;
max_connections=_max_connections;
max_replication_lag=_max_replication_lag;
use_ssl=_use_ssl;
cur_replication_lag_count=0;
max_latency_us=_max_latency_ms*1000;
current_latency_us=0;
aws_aurora_current_lag_us = 0;
connect_OK=0;
connect_ERR=0;
queries_sent=0;
bytes_sent=0;
bytes_recv=0;
max_connections_used=0;
time_last_detected_error=0;
connect_ERR_at_time_last_detected_error=0;
shunned_automatic=false;
shunned_and_kill_all_connections=false; // false to default
//charset=_charset;
myhgc=NULL;
comment=strdup(_comment);
ConnectionsUsed=new PgSQL_SrvConnList(this);
ConnectionsFree=new PgSQL_SrvConnList(this);
}
void PgSQL_SrvC::connect_error(int err_num, bool get_mutex) {
// NOTE: this function operates without any mutex
// although, it is not extremely important if any counter is lost
// as a single connection failure won't make a significant difference
proxy_debug(PROXY_DEBUG_MYSQL_CONNECTION, 5, "Connect failed with code '%d'\n", err_num);
__sync_fetch_and_add(&connect_ERR,1);
__sync_fetch_and_add(&PgHGM->status.server_connections_aborted,1);
if (err_num >= 1048 && err_num <= 1052)
return;
if (err_num >= 1054 && err_num <= 1075)
return;
if (err_num >= 1099 && err_num <= 1104)
return;
if (err_num >= 1106 && err_num <= 1113)
return;
if (err_num >= 1116 && err_num <= 1118)
return;
if (err_num == 1136 || (err_num >= 1138 && err_num <= 1149))
return;
switch (err_num) {
case 1007: // Can't create database
case 1008: // Can't drop database
case 1044: // access denied
case 1045: // access denied
/*
case 1048: // Column cannot be null
case 1049: // Unknown database
case 1050: // Table already exists
case 1051: // Unknown table
case 1052: // Column is ambiguous
*/
case 1120:
case 1203: // User %s already has more than 'max_user_connections' active connections
case 1226: // User '%s' has exceeded the '%s' resource (current value: %ld)
case 3118: // Access denied for user '%s'. Account is locked..
return;
break;
default:
break;
}
time_t t=time(NULL);
if (t > time_last_detected_error) {
time_last_detected_error=t;
connect_ERR_at_time_last_detected_error=1;
} else {
if (t < time_last_detected_error) {
// time_last_detected_error is in the future
// this means that monitor has a ping interval too big and tuned that in the future
return;
}
// same time
/**
* @brief The expected configured retries set by 'pgsql-connect_retries_on_failure' + '2' extra expected
* connection errors.
* @details This two extra connections errors are expected:
* 1. An initial connection error generated by the datastream and the connection when being created,
* this is, right after the session has requested a connection to the connection pool. This error takes
* places directly in the state machine from 'PgSQL_Connection'. Because of this, we consider this
* additional error to be a consequence of the two states machines, and it's not considered for
* 'connect_retries'.
* 2. A second connection connection error, which is the initial connection error generated by 'PgSQL_Session'
* when already in the 'CONNECTING_SERVER' state. This error is an 'extra error' to always consider, since
* it's not part of the retries specified by 'pgsql_thread___connect_retries_on_failure', thus, we set the
* 'connect_retries' to be 'pgsql_thread___connect_retries_on_failure + 1'.
*/
int connect_retries = pgsql_thread___connect_retries_on_failure + 1;
int max_failures = pgsql_thread___shun_on_failures > connect_retries ? connect_retries : pgsql_thread___shun_on_failures;
if (__sync_add_and_fetch(&connect_ERR_at_time_last_detected_error,1) >= (unsigned int)max_failures) {
bool _shu=false;
if (get_mutex==true)
PgHGM->wrlock(); // to prevent race conditions, lock here. See #627
if (status==MYSQL_SERVER_STATUS_ONLINE) {
status=MYSQL_SERVER_STATUS_SHUNNED;
shunned_automatic=true;
_shu=true;
} else {
_shu=false;
}
if (get_mutex==true)
PgHGM->wrunlock();
if (_shu) {
proxy_error("Shunning server %s:%d with %u errors/sec. Shunning for %u seconds\n", address, port, connect_ERR_at_time_last_detected_error , pgsql_thread___shun_recovery_time_sec);
}
}
}
}
void PgSQL_SrvC::shun_and_killall() {
status=MYSQL_SERVER_STATUS_SHUNNED;
shunned_automatic=true;
shunned_and_kill_all_connections=true;
}
PgSQL_SrvC::~PgSQL_SrvC() {
if (address) free(address);
if (comment) free(comment);
delete ConnectionsUsed;
delete ConnectionsFree;
}
using metric_name = std::string;
using metric_help = std::string;
using metric_tags = std::map<std::string, std::string>;
using hg_counter_tuple =
std::tuple<
PgSQL_p_hg_counter::metric,
metric_name,
metric_help,
metric_tags
>;
using hg_gauge_tuple =
std::tuple<
PgSQL_p_hg_gauge::metric,
metric_name,
metric_help,
metric_tags
>;
using hg_dyn_counter_tuple =
std::tuple<
PgSQL_p_hg_dyn_counter::metric,
metric_name,
metric_help,
metric_tags
>;
using hg_dyn_gauge_tuple =
std::tuple<
PgSQL_p_hg_dyn_gauge::metric,
metric_name,
metric_help,
metric_tags
>;
using hg_counter_vector = std::vector<hg_counter_tuple>;
using hg_gauge_vector = std::vector<hg_gauge_tuple>;
using hg_dyn_counter_vector = std::vector<hg_dyn_counter_tuple>;
using hg_dyn_gauge_vector = std::vector<hg_dyn_gauge_tuple>;
/**
* @brief Metrics map holding the metrics for the 'PgSQL_HostGroups_Manager' module.
*
* @note Many metrics in this map, share a common "id name", because
* they differ only by label, because of this, HELP is shared between
* them. For better visual identification of this groups they are
* sepparated using a line separator comment.
*/
const std::tuple<
hg_counter_vector,
hg_gauge_vector,
hg_dyn_counter_vector,
hg_dyn_gauge_vector
>
hg_metrics_map = std::make_tuple(
hg_counter_vector {
std::make_tuple (
PgSQL_p_hg_counter::servers_table_version,
"proxysql_servers_table_version_total",
"Number of times the \"servers_table\" have been modified.",
metric_tags {}
),
// ====================================================================
std::make_tuple (
PgSQL_p_hg_counter::server_connections_created,
"proxysql_server_connections_total",
"Total number of server connections (created|delayed|aborted).",
metric_tags {
{ "status", "created" }
}
),
std::make_tuple (
PgSQL_p_hg_counter::server_connections_delayed,
"proxysql_server_connections_total",
"Total number of server connections (created|delayed|aborted).",
metric_tags {
{ "status", "delayed" }
}
),
std::make_tuple (
PgSQL_p_hg_counter::server_connections_aborted,
"proxysql_server_connections_total",
"Total number of server connections (created|delayed|aborted).",
metric_tags {
{ "status", "aborted" }
}
),
// ====================================================================
// ====================================================================
std::make_tuple (
PgSQL_p_hg_counter::client_connections_created,
"proxysql_client_connections_total",
"Total number of client connections created.",
metric_tags {
{ "status", "created" }
}
),
std::make_tuple (
PgSQL_p_hg_counter::client_connections_aborted,
"proxysql_client_connections_total",
"Total number of client failed connections (or closed improperly).",
metric_tags {
{ "status", "aborted" }
}
),
// ====================================================================
/*std::make_tuple(
PgSQL_p_hg_counter::com_autocommit,
"proxysql_com_autocommit_total",
"Total queries autocommited.",
metric_tags {}
),
std::make_tuple(
PgSQL_p_hg_counter::com_autocommit_filtered,
"proxysql_com_autocommit_filtered_total",
"Total queries filtered autocommit.",
metric_tags {}
),*/
std::make_tuple (
PgSQL_p_hg_counter::com_rollback,
"proxysql_com_rollback_total",
"Total queries rollbacked.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::com_rollback_filtered,
"proxysql_com_rollback_filtered_total",
"Total queries filtered rollbacked.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::com_backend_reset_connection,
"proxysql_com_backend_reset_connection_total",
"Total backend_reset_connection queries backend.",
metric_tags {}
),
/*std::make_tuple(
PgSQL_p_hg_counter::com_backend_init_db,
"proxysql_com_backend_init_db_total",
"Total queries backend INIT DB.",
metric_tags {}
),*/
std::make_tuple (
PgSQL_p_hg_counter::com_backend_set_client_encoding,
"proxysql_com_backend_set_client_encoding_total",
"Total queries backend SET client_encoding.",
metric_tags {}
),
/*std::make_tuple(
PgSQL_p_hg_counter::com_frontend_init_db,
"proxysql_com_frontend_init_db_total",
"Total INIT DB queries frontend.",
metric_tags {}
),*/
std::make_tuple (
PgSQL_p_hg_counter::com_frontend_set_client_encoding,
"proxysql_com_frontend_set_client_encoding_total",
"Total SET client_encoding frontend queries.",
metric_tags {}
),
/*std::make_tuple(
PgSQL_p_hg_counter::com_frontend_use_db,
"proxysql_com_frontend_use_db_total",
"Total USE DB queries frontend.",
metric_tags {}
),*/
std::make_tuple (
PgSQL_p_hg_counter::com_commit_cnt,
"proxysql_com_commit_cnt_total",
"Total queries commit.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::com_commit_cnt_filtered,
"proxysql_com_commit_cnt_filtered_total",
"Total queries commit filtered.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::selects_for_update__autocommit0,
"proxysql_selects_for_update__autocommit0_total",
"Total queries that are SELECT for update or equivalent.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::access_denied_wrong_password,
"proxysql_access_denied_wrong_password_total",
"Total access denied \"wrong password\".",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::access_denied_max_connections,
"proxysql_access_denied_max_connections_total",
"Total access denied \"max connections\".",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::access_denied_max_user_connections,
"proxysql_access_denied_max_user_connections_total",
"Total access denied \"max user connections\".",
metric_tags {}
),
// ====================================================================
std::make_tuple (
PgSQL_p_hg_counter::pghgm_pgconnpool_get,
"proxysql_pghgm_pgconnpool_get_total",
"The number of requests made to the connection pool.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::pghgm_pgconnpool_get_ok,
"proxysql_pghgm_pgconnpool_get_ok_total",
"The number of successful requests to the connection pool (i.e. where a connection was available).",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::pghgm_pgconnpool_get_ping,
"proxysql_pghgm_myconnpool_get_ping_total",
"The number of connections that were taken from the pool to run a ping to keep them alive.",
metric_tags {}
),
// ====================================================================
std::make_tuple (
PgSQL_p_hg_counter::pghgm_pgconnpool_push,
"proxysql_pghgm_pgconnpool_push_total",
"The number of connections returned to the connection pool.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::pghgm_pgconnpool_reset,
"proxysql_pghgm_pgconnpool_reset_total",
"The number of connections that have been reset / re-initialized using \"COM_CHANGE_USER\"",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_counter::pghgm_pgconnpool_destroy,
"proxysql_pghgm_pgconnpool_destroy_total",
"The number of connections considered unhealthy and therefore closed.",
metric_tags {}
),
// ====================================================================
std::make_tuple (
PgSQL_p_hg_counter::auto_increment_delay_multiplex,
"proxysql_myhgm_auto_increment_multiplex_total",
"The number of times that 'auto_increment_delay_multiplex' has been triggered.",
metric_tags {}
),
},
// prometheus gauges
hg_gauge_vector {
std::make_tuple (
PgSQL_p_hg_gauge::server_connections_connected,
"proxysql_server_connections_connected",
"Backend connections that are currently connected.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_gauge::client_connections_connected,
"proxysql_client_connections_connected",
"Client connections that are currently connected.",
metric_tags {}
)
},
// prometheus dynamic counters
hg_dyn_counter_vector {
// connection_pool
// ====================================================================
// ====================================================================
std::make_tuple (
PgSQL_p_hg_dyn_counter::conn_pool_bytes_data_recv,
"proxysql_connpool_data_bytes_total",
"Amount of data (sent|recv) from the backend, excluding metadata.",
metric_tags {
{ "traffic_flow", "recv" }
}
),
std::make_tuple (
PgSQL_p_hg_dyn_counter::conn_pool_bytes_data_sent,
"proxysql_connpool_data_bytes_total",
"Amount of data (sent|recv) from the backend, excluding metadata.",
metric_tags {
{ "traffic_flow", "sent" }
}
),
// ====================================================================
// ====================================================================
std::make_tuple (
PgSQL_p_hg_dyn_counter::connection_pool_conn_err,
"proxysql_connpool_conns_total",
"How many connections have been tried to be established.",
metric_tags {
{ "status", "err" }
}
),
std::make_tuple (
PgSQL_p_hg_dyn_counter::connection_pool_conn_ok,
"proxysql_connpool_conns_total",
"How many connections have been tried to be established.",
metric_tags {
{ "status", "ok" }
}
),
// ====================================================================
std::make_tuple (
PgSQL_p_hg_dyn_counter::connection_pool_queries,
"proxysql_connpool_conns_queries_total",
"The number of queries routed towards this particular backend server.",
metric_tags {}
),
// gtid
std::make_tuple (
PgSQL_p_hg_dyn_counter::gtid_executed,
"proxysql_gtid_executed_total",
"Tracks the number of executed gtid per host and port.",
metric_tags {}
),
// pgsql_error
std::make_tuple (
PgSQL_p_hg_dyn_counter::proxysql_pgsql_error,
"proxysql_pgsql_error_total",
"Tracks the pgsql errors generated by proxysql.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_dyn_counter::pgsql_error,
"pgsql_error_total",
"Tracks the pgsql errors encountered.",
metric_tags {}
)
},
// prometheus dynamic gauges
hg_dyn_gauge_vector {
std::make_tuple (
PgSQL_p_hg_dyn_gauge::connection_pool_conn_free,
"proxysql_connpool_conns",
"How many backend connections are currently (free|used).",
metric_tags {
{ "status", "free" }
}
),
std::make_tuple (
PgSQL_p_hg_dyn_gauge::connection_pool_conn_used,
"proxysql_connpool_conns",
"How many backend connections are currently (free|used).",
metric_tags {
{ "status", "used" }
}
),
std::make_tuple (
PgSQL_p_hg_dyn_gauge::connection_pool_latency_us,
"proxysql_connpool_conns_latency_us",
"The currently ping time in microseconds, as reported from Monitor.",
metric_tags {}
),
std::make_tuple (
PgSQL_p_hg_dyn_gauge::connection_pool_status,
"proxysql_connpool_conns_status",
"The status of the backend server (1 - ONLINE, 2 - SHUNNED, 3 - OFFLINE_SOFT, 4 - OFFLINE_HARD).",
metric_tags {}
)
}
);
PgSQL_HostGroups_Manager::PgSQL_HostGroups_Manager() {
status.client_connections=0;
status.client_connections_aborted=0;
status.client_connections_created=0;
status.server_connections_connected=0;
status.server_connections_aborted=0;
status.server_connections_created=0;
status.server_connections_delayed=0;
status.servers_table_version=0;
pthread_mutex_init(&status.servers_table_version_lock, NULL);
pthread_cond_init(&status.servers_table_version_cond, NULL);
status.pgconnpoll_get=0;
status.pgconnpoll_get_ok=0;
status.pgconnpoll_get_ping=0;
status.pgconnpoll_push=0;
status.pgconnpoll_destroy=0;
status.pgconnpoll_reset=0;
status.autocommit_cnt=0;
status.commit_cnt=0;
status.rollback_cnt=0;
status.autocommit_cnt_filtered=0;
status.commit_cnt_filtered=0;
status.rollback_cnt_filtered=0;
status.backend_reset_connection=0;
//status.backend_init_db=0;
status.backend_set_client_encoding=0;
//status.frontend_init_db=0;
status.frontend_set_client_encoding=0;
//status.frontend_use_db=0;
status.access_denied_wrong_password=0;
status.access_denied_max_connections=0;
status.access_denied_max_user_connections=0;
status.select_for_update_or_equivalent=0;
status.auto_increment_delay_multiplex=0;
#if 0
pthread_mutex_init(&readonly_mutex, NULL);
pthread_mutex_init(&lock, NULL);
admindb=NULL; // initialized only if needed
mydb=new SQLite3DB();
#endif // 0
#ifdef DEBUG
mydb->open((char *)"file:mem_mydb?mode=memory&cache=shared", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX);
#else
mydb->open((char *)"file:mem_mydb?mode=memory", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX);
#endif /* DEBUG */
mydb->execute(MYHGM_PgSQL_SERVERS);
mydb->execute(MYHGM_PgSQL_SERVERS_INCOMING);
mydb->execute(MYHGM_PgSQL_REPLICATION_HOSTGROUPS);
mydb->execute(MYHGM_PgSQL_HOSTGROUP_ATTRIBUTES);
mydb->execute("CREATE INDEX IF NOT EXISTS idx_pgsql_servers_hostname_port ON pgsql_servers (hostname,port)");
MyHostGroups=new PtrArray();
runtime_pgsql_servers=NULL;
incoming_replication_hostgroups=NULL;
incoming_hostgroup_attributes = NULL;
incoming_pgsql_servers_v2 = NULL;
pgsql_servers_to_monitor = NULL;
{
static const char alphanum[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
rand_del[0] = '-';
for (int i = 1; i < 6; i++) {
rand_del[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
}
rand_del[6] = '-';
rand_del[7] = 0;
}
pthread_mutex_init(&pgsql_errors_mutex, NULL);
// Initialize prometheus metrics
init_prometheus_counter_array<PgSQL_hg_metrics_map_idx, PgSQL_p_hg_counter>(hg_metrics_map, this->status.p_counter_array);
init_prometheus_gauge_array<PgSQL_hg_metrics_map_idx, PgSQL_p_hg_gauge>(hg_metrics_map, this->status.p_gauge_array);
init_prometheus_dyn_counter_array<PgSQL_hg_metrics_map_idx, PgSQL_p_hg_dyn_counter>(hg_metrics_map, this->status.p_dyn_counter_array);
init_prometheus_dyn_gauge_array<PgSQL_hg_metrics_map_idx, PgSQL_p_hg_dyn_gauge>(hg_metrics_map, this->status.p_dyn_gauge_array);
pthread_mutex_init(&pgsql_errors_mutex, NULL);
}
void PgSQL_HostGroups_Manager::init() {
// do nothing here
}
void PgSQL_HostGroups_Manager::shutdown() {
pthread_mutex_lock(&pgsql_errors_mutex);
pgsql_errors_umap.clear();
pthread_mutex_unlock(&pgsql_errors_mutex);
}
PgSQL_HostGroups_Manager::~PgSQL_HostGroups_Manager() {
while (MyHostGroups->len) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->remove_index_fast(0);
delete myhgc;
}
delete MyHostGroups;
delete mydb;
if (admindb) {
delete admindb;
}
pthread_mutex_destroy(&lock);
}
void PgSQL_HostGroups_Manager::p_update_pgsql_error_counter(p_pgsql_error_type err_type, unsigned int hid, char* address, uint16_t port, unsigned int code) {
PgSQL_p_hg_dyn_counter::metric metric = PgSQL_p_hg_dyn_counter::pgsql_error;
if (err_type == p_pgsql_error_type::proxysql) {
metric = PgSQL_p_hg_dyn_counter::proxysql_pgsql_error;
}
std::string s_hostgroup = std::to_string(hid);
std::string s_address = std::string(address);
std::string s_port = std::to_string(port);
// TODO: Create switch here to classify error codes
std::string s_code = std::to_string(code);
std::string metric_id = s_hostgroup + ":" + address + ":" + s_port + ":" + s_code;
std::map<string, string> metric_labels {
{ "hostgroup", s_hostgroup },
{ "address", address },
{ "port", s_port },
{ "code", s_code }
};
pthread_mutex_lock(&pgsql_errors_mutex);
p_inc_map_counter(
status.p_pgsql_errors_map,
status.p_dyn_counter_array[metric],
metric_id,
metric_labels
);
pthread_mutex_unlock(&pgsql_errors_mutex);
}
void PgSQL_HostGroups_Manager::wait_servers_table_version(unsigned v, unsigned w) {
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
//ts.tv_sec += w;
unsigned int i = 0;
int rc = 0;
pthread_mutex_lock(&status.servers_table_version_lock);
while ((rc == 0 || rc == ETIMEDOUT) && (i < w) && (__sync_fetch_and_add(&glovars.shutdown,0)==0) && (__sync_fetch_and_add(&status.servers_table_version,0) < v)) {
i++;
ts.tv_sec += 1;
rc = pthread_cond_timedwait( &status.servers_table_version_cond, &status.servers_table_version_lock, &ts);
}
pthread_mutex_unlock(&status.servers_table_version_lock);
}
unsigned int PgSQL_HostGroups_Manager::get_servers_table_version() {
return __sync_fetch_and_add(&status.servers_table_version,0);
}
// we always assume that the calling thread has acquired a rdlock()
int PgSQL_HostGroups_Manager::servers_add(SQLite3_result *resultset) {
if (resultset==NULL) {
return 0;
}
int rc;
mydb->execute("DELETE FROM pgsql_servers_incoming");
sqlite3_stmt *statement1=NULL;
sqlite3_stmt *statement32=NULL;
//sqlite3 *mydb3=mydb->get_db();
char *query1=(char *)"INSERT INTO pgsql_servers_incoming VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11)";
std::string query32s = "INSERT INTO pgsql_servers_incoming VALUES " + generate_multi_rows_query(32,11);
char *query32 = (char *)query32s.c_str();
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query1, -1, &statement1, 0);
rc = mydb->prepare_v2(query1, &statement1);
ASSERT_SQLITE_OK(rc, mydb);
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query32, -1, &statement32, 0);
rc = mydb->prepare_v2(query32, &statement32);
ASSERT_SQLITE_OK(rc, mydb);
MySerStatus status1=MYSQL_SERVER_STATUS_ONLINE;
int row_idx=0;
int max_bulk_row_idx=resultset->rows_count/32;
max_bulk_row_idx=max_bulk_row_idx*32;
for (std::vector<SQLite3_row *>::iterator it = resultset->rows.begin() ; it != resultset->rows.end(); ++it) {
SQLite3_row *r1=*it;
status1=MYSQL_SERVER_STATUS_ONLINE;
if (strcasecmp(r1->fields[3],"ONLINE")) {
if (!strcasecmp(r1->fields[3],"SHUNNED")) {
status1=MYSQL_SERVER_STATUS_SHUNNED;
} else {
if (!strcasecmp(r1->fields[3],"OFFLINE_SOFT")) {
status1=MYSQL_SERVER_STATUS_OFFLINE_SOFT;
} else {
if (!strcasecmp(r1->fields[3],"OFFLINE_HARD")) {
status1=MYSQL_SERVER_STATUS_OFFLINE_HARD;
}
}
}
}
int idx=row_idx%32;
if (row_idx<max_bulk_row_idx) { // bulk
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+1, atoi(r1->fields[0])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement32, (idx*11)+2, r1->fields[1], -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+3, atoi(r1->fields[2])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+4, atoi(r1->fields[4])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+5, status1); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+6, atoi(r1->fields[5])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+7, atoi(r1->fields[6])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+8, atoi(r1->fields[7])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+9, atoi(r1->fields[8])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (idx*11)+10, atoi(r1->fields[9])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement32, (idx*11)+11, r1->fields[10], -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
if (idx==31) {
SAFE_SQLITE3_STEP2(statement32);
rc=(*proxy_sqlite3_clear_bindings)(statement32); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement32); ASSERT_SQLITE_OK(rc, mydb);
}
} else { // single row
rc=(*proxy_sqlite3_bind_int64)(statement1, 1, atoi(r1->fields[0])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement1, 2, r1->fields[1], -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 3, atoi(r1->fields[2])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 4, atoi(r1->fields[4])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 5, status1); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 6, atoi(r1->fields[5])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 7, atoi(r1->fields[6])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 8, atoi(r1->fields[7])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 9, atoi(r1->fields[8])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 10, atoi(r1->fields[9])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement1, 11, r1->fields[10], -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
SAFE_SQLITE3_STEP2(statement1);
rc=(*proxy_sqlite3_clear_bindings)(statement1); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement1); ASSERT_SQLITE_OK(rc, mydb);
}
row_idx++;
}
(*proxy_sqlite3_finalize)(statement1);
(*proxy_sqlite3_finalize)(statement32);
return 0;
}
void PgSQL_HostGroups_Manager::CUCFT1(
SpookyHash& myhash, bool& init, const string& TableName, const string& ColumnName, uint64_t& raw_checksum
) {
char *error=NULL;
int cols=0;
int affected_rows=0;
SQLite3_result *resultset=NULL;
string query = "SELECT * FROM " + TableName + " ORDER BY " + ColumnName;
mydb->execute_statement(query.c_str(), &error , &cols , &affected_rows , &resultset);
if (resultset) {
if (resultset->rows_count) {
if (init == false) {
init = true;
myhash.Init(19,3);
}
uint64_t hash1_ = resultset->raw_checksum();
raw_checksum = hash1_;
myhash.Update(&hash1_, sizeof(hash1_));
proxy_info("Checksum for table %s is 0x%lX\n", TableName.c_str(), hash1_);
}
delete resultset;
} else {
proxy_info("Checksum for table %s is 0x%lX\n", TableName.c_str(), (long unsigned int)0);
}
}
void PgSQL_HostGroups_Manager::commit_update_checksums_from_tables(SpookyHash& myhash, bool& init) {
// Always reset the current table values before recomputing
for (size_t i = 0; i < table_resultset_checksum.size(); i++) {
if (i != HGM_TABLES::PgSQL_SERVERS && i != HGM_TABLES::PgSQL_SERVERS_V2) {
table_resultset_checksum[i] = 0;
}
}
CUCFT1(myhash,init,"pgsql_replication_hostgroups","writer_hostgroup", table_resultset_checksum[HGM_TABLES::PgSQL_REPLICATION_HOSTGROUPS]);
CUCFT1(myhash,init,"pgsql_hostgroup_attributes","hostgroup_id", table_resultset_checksum[HGM_TABLES::PgSQL_HOSTGROUP_ATTRIBUTES]);
}
/**
* @brief This code updates the 'hostgroup_server_mapping' table with the most recent pgsql_servers and pgsql_replication_hostgroups
* records while utilizing checksums to prevent unnecessary updates.
*
* IMPORTANT: Make sure wrlock() is called before calling this method.
*
*/
void PgSQL_HostGroups_Manager::update_hostgroup_manager_mappings() {
if (hgsm_pgsql_servers_checksum != table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS] ||
hgsm_pgsql_replication_hostgroups_checksum != table_resultset_checksum[HGM_TABLES::PgSQL_REPLICATION_HOSTGROUPS])
{
proxy_info("Rebuilding 'Hostgroup_Manager_Mapping' due to checksums change - pgsql_servers { old: 0x%lX, new: 0x%lX }, pgsql_replication_hostgroups { old:0x%lX, new:0x%lX }\n",
hgsm_pgsql_servers_checksum, table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS],
hgsm_pgsql_replication_hostgroups_checksum, table_resultset_checksum[HGM_TABLES::PgSQL_REPLICATION_HOSTGROUPS]);
char* error = NULL;
int cols = 0;
int affected_rows = 0;
SQLite3_result* resultset = NULL;
hostgroup_server_mapping.clear();
const char* query = "SELECT DISTINCT hostname, port, '1' is_writer, status, reader_hostgroup, writer_hostgroup, mem_pointer FROM pgsql_replication_hostgroups JOIN pgsql_servers ON hostgroup_id=writer_hostgroup WHERE status<>3 \
UNION \
SELECT DISTINCT hostname, port, '0' is_writer, status, reader_hostgroup, writer_hostgroup, mem_pointer FROM pgsql_replication_hostgroups JOIN pgsql_servers ON hostgroup_id=reader_hostgroup WHERE status<>3 \
ORDER BY hostname, port";
mydb->execute_statement(query, &error, &cols, &affected_rows, &resultset);
if (resultset && resultset->rows_count) {
std::string fetched_server_id;
HostGroup_Server_Mapping* fetched_server_mapping = NULL;
for (std::vector<SQLite3_row*>::iterator it = resultset->rows.begin(); it != resultset->rows.end(); ++it) {
SQLite3_row* r = *it;
const std::string& server_id = std::string(r->fields[0]) + ":::" + r->fields[1];
if (fetched_server_mapping == NULL || server_id != fetched_server_id) {
auto itr = hostgroup_server_mapping.find(server_id);
if (itr == hostgroup_server_mapping.end()) {
std::unique_ptr<HostGroup_Server_Mapping> server_mapping(new HostGroup_Server_Mapping(this));
fetched_server_mapping = server_mapping.get();
hostgroup_server_mapping.insert( std::pair<std::string,std::unique_ptr<PgSQL_HostGroups_Manager::HostGroup_Server_Mapping>> {
server_id, std::move(server_mapping)
} );
} else {
fetched_server_mapping = itr->second.get();
}
fetched_server_id = server_id;
}
HostGroup_Server_Mapping::Node node;
//node.server_status = static_cast<MySerStatus>(atoi(r->fields[3]));
node.reader_hostgroup_id = atoi(r->fields[4]);
node.writer_hostgroup_id = atoi(r->fields[5]);
node.srv = reinterpret_cast<PgSQL_SrvC*>(atoll(r->fields[6]));
HostGroup_Server_Mapping::Type type = (r->fields[2] && r->fields[2][0] == '1') ? HostGroup_Server_Mapping::Type::WRITER : HostGroup_Server_Mapping::Type::READER;
fetched_server_mapping->add(type, node);
}
}
delete resultset;
hgsm_pgsql_servers_checksum = table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS];
hgsm_pgsql_replication_hostgroups_checksum = table_resultset_checksum[HGM_TABLES::PgSQL_REPLICATION_HOSTGROUPS];
}
}
/**
* @brief Generates a resultset holding the current Admin 'runtime_pgsql_servers' as reported by Admin.
* @details Requires caller to hold the mutex 'PgSQL_HostGroups_Manager::wrlock'.
* @param mydb The db in which to perform the query, typically 'PgSQL_HostGroups_Manager::mydb'.
* @return An SQLite3 resultset for the query 'MYHGM_GEN_ADMIN_RUNTIME_SERVERS'.
*/
unique_ptr<SQLite3_result> get_admin_runtime_pgsql_servers(SQLite3DB* mydb) {
char* error = nullptr;
int cols = 0;
int affected_rows = 0;
SQLite3_result* resultset = nullptr;
mydb->execute_statement(PGHGM_GEN_CLUSTER_ADMIN_RUNTIME_SERVERS, &error, &cols, &affected_rows, &resultset);
if (error) {
proxy_error("SQLite3 query generating 'runtime_pgsql_servers' resultset failed with error '%s'\n", error);
assert(0);
}
return unique_ptr<SQLite3_result>(resultset);
}
/**
* @brief Generates a resultset with holding the current 'pgsql_servers_v2' table.
* @details Requires caller to hold the mutex 'ProxySQL_Admin::mysql_servers_wrlock'.
* @return A resulset holding 'pgsql_servers_v2'.
*/
unique_ptr<SQLite3_result> get_pgsql_servers_v2() {
char* error = nullptr;
int cols = 0;
int affected_rows = 0;
SQLite3_result* resultset = nullptr;
if (GloAdmin && GloAdmin->admindb) {
GloAdmin->admindb->execute_statement(
PGHGM_GEN_CLUSTER_ADMIN_PGSQL_SERVERS, &error, &cols, &affected_rows, &resultset
);
}
return unique_ptr<SQLite3_result>(resultset);
}
static void update_glovars_checksum_with_peers(
ProxySQL_Checksum_Value& module_checksum,
const string& new_checksum,
const string& peer_checksum_value,
time_t new_epoch,
time_t peer_checksum_epoch,
bool update_version
) {
module_checksum.set_checksum(const_cast<char*>(new_checksum.c_str()));
if (update_version)
module_checksum.version++;
bool computed_checksum_matches =
peer_checksum_value != "" && module_checksum.checksum == peer_checksum_value;
if (peer_checksum_epoch != 0 && computed_checksum_matches) {
module_checksum.epoch = peer_checksum_epoch;
} else {
module_checksum.epoch = new_epoch;
}
}
/**
* @brief Updates the global 'pgsql_servers' module checksum.
* @details If the new computed checksum matches the supplied 'cluster_checksum', the epoch used for the
* checksum is the supplied epoch instead of current time. This way we ensure the preservation of the
* checksum and epoch fetched from the ProxySQL cluster peer node.
*
* IMPORTANT: This function also generates a new 'global_checksum'. This is because everytime
* 'runtime_pgsql_servers' change, updating the global checksum is unconditional.
* @param new_checksum The new computed checksum for 'runtime_pgsql_servers'.
* @param peer_checksum A checksum fetched from another ProxySQL cluster node, holds the checksum value
* and its epoch. Should be empty if no remote checksum is being considered.
* @param epoch The epoch to be preserved in case the supplied 'peer_checksum' matches the new computed
* checksum.
*/
static void update_glovars_pgsql_servers_checksum(
const string& new_checksum,
const runtime_pgsql_servers_checksum_t& peer_checksum = {},
bool update_version = false
) {
time_t new_epoch = time(NULL);
update_glovars_checksum_with_peers(
GloVars.checksums_values.pgsql_servers,
new_checksum,
peer_checksum.value,
new_epoch,
peer_checksum.epoch,
update_version
);
GloVars.checksums_values.updates_cnt++;
GloVars.generate_global_checksum();
GloVars.epoch_version = new_epoch;
}
/**
* @brief Updates the global 'pgsql_servers_v2' module checksum.
* @details Unlike 'update_glovars_pgsql_servers_checksum' this function doesn't generate a new
* 'global_checksum'. It's caller responsibility to ensure that 'global_checksum' is updated.
* @param new_checksum The new computed checksum for 'pgsql_servers_v2'.
* @param peer_checksum A checksum fetched from another ProxySQL cluster node, holds the checksum value
* and its epoch. Should be empty if no remote checksum is being considered.
* @param epoch The epoch to be preserved in case the supplied 'peer_checksum' matches the new computed
* checksum.
*/
static void update_glovars_pgsql_servers_v2_checksum(
const string& new_checksum,
const pgsql_servers_v2_checksum_t& peer_checksum = {},
bool update_version = false
) {
time_t new_epoch = time(NULL);
update_glovars_checksum_with_peers(
GloVars.checksums_values.pgsql_servers_v2,
new_checksum,
peer_checksum.value,
new_epoch,
peer_checksum.epoch,
update_version
);
}
uint64_t PgSQL_HostGroups_Manager::commit_update_checksum_from_pgsql_servers(SQLite3_result* runtime_pgsql_servers) {
mydb->execute("DELETE FROM pgsql_servers");
generate_pgsql_servers_table();
if (runtime_pgsql_servers == nullptr) {
unique_ptr<SQLite3_result> resultset { get_admin_runtime_pgsql_servers(mydb) };
save_runtime_pgsql_servers(resultset.release());
} else {
save_runtime_pgsql_servers(runtime_pgsql_servers);
}
uint64_t raw_checksum = this->runtime_pgsql_servers ? this->runtime_pgsql_servers->raw_checksum() : 0;
table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS] = raw_checksum;
return raw_checksum;
}
uint64_t PgSQL_HostGroups_Manager::commit_update_checksum_from_pgsql_servers_v2(SQLite3_result* pgsql_servers_v2) {
if (pgsql_servers_v2 == nullptr) {
unique_ptr<SQLite3_result> resultset { get_pgsql_servers_v2() };
save_pgsql_servers_v2(resultset.release());
} else {
save_pgsql_servers_v2(pgsql_servers_v2);
}
uint64_t raw_checksum = this->incoming_pgsql_servers_v2 ? this->incoming_pgsql_servers_v2->raw_checksum() : 0;
table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS_V2] = raw_checksum;
return raw_checksum;
}
std::string PgSQL_HostGroups_Manager::gen_global_pgsql_servers_v2_checksum(uint64_t servers_v2_hash) {
bool init = false;
SpookyHash global_hash {};
if (servers_v2_hash != 0) {
if (init == false) {
init = true;
global_hash.Init(19, 3);
}
global_hash.Update(&servers_v2_hash, sizeof(servers_v2_hash));
}
commit_update_checksums_from_tables(global_hash, init);
uint64_t hash_1 = 0, hash_2 = 0;
if (init) {
global_hash.Final(&hash_1,&hash_2);
}
string mysrvs_checksum { get_checksum_from_hash(hash_1) };
return mysrvs_checksum;
}
bool PgSQL_HostGroups_Manager::commit(
const peer_runtime_pgsql_servers_t& peer_runtime_pgsql_servers,
const peer_pgsql_servers_v2_t& peer_pgsql_servers_v2,
bool only_commit_runtime_pgsql_servers,
bool update_version
) {
// if only_commit_runtime_pgsql_servers is true, pgsql_servers_v2 resultset will not be entertained and will cause memory leak.
if (only_commit_runtime_pgsql_servers) {
proxy_info("Generating runtime pgsql servers records only.\n");
} else {
proxy_info("Generating runtime pgsql servers and pgsql servers v2 records.\n");
}
unsigned long long curtime1=monotonic_time();
wrlock();
// purge table
purge_pgsql_servers_table();
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "DELETE FROM pgsql_servers\n");
mydb->execute("DELETE FROM pgsql_servers");
generate_pgsql_servers_table();
char *error=NULL;
int cols=0;
int affected_rows=0;
SQLite3_result *resultset=NULL;
if (GloPTH->variables.hostgroup_manager_verbose) {
mydb->execute_statement((char *)"SELECT * FROM pgsql_servers_incoming", &error , &cols , &affected_rows , &resultset);
if (error) {
proxy_error("Error on read from pgsql_servers_incoming : %s\n", error);
} else {
if (resultset) {
proxy_info("Dumping pgsql_servers_incoming\n");
resultset->dump_to_stderr();
}
}
if (resultset) { delete resultset; resultset=NULL; }
}
char *query=NULL;
query=(char *)"SELECT mem_pointer, t1.hostgroup_id, t1.hostname, t1.port FROM pgsql_servers t1 LEFT OUTER JOIN pgsql_servers_incoming t2 ON (t1.hostgroup_id=t2.hostgroup_id AND t1.hostname=t2.hostname AND t1.port=t2.port) WHERE t2.hostgroup_id IS NULL";
mydb->execute_statement(query, &error , &cols , &affected_rows , &resultset);
if (error) {
proxy_error("Error on %s : %s\n", query, error);
} else {
if (GloPTH->variables.hostgroup_manager_verbose) {
proxy_info("Dumping pgsql_servers LEFT JOIN pgsql_servers_incoming\n");
resultset->dump_to_stderr();
}
for (std::vector<SQLite3_row *>::iterator it = resultset->rows.begin() ; it != resultset->rows.end(); ++it) {
SQLite3_row *r=*it;
long long ptr=atoll(r->fields[0]);
proxy_warning("Removed server at address %lld, hostgroup %s, address %s port %s. Setting status OFFLINE HARD and immediately dropping all free connections. Used connections will be dropped when trying to use them\n", ptr, r->fields[1], r->fields[2], r->fields[3]);
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)ptr;
mysrvc->status=MYSQL_SERVER_STATUS_OFFLINE_HARD;
mysrvc->ConnectionsFree->drop_all_connections();
char *q1=(char *)"DELETE FROM pgsql_servers WHERE mem_pointer=%lld";
char *q2=(char *)malloc(strlen(q1)+32);
sprintf(q2,q1,ptr);
mydb->execute(q2);
free(q2);
}
}
if (resultset) { delete resultset; resultset=NULL; }
// This seems unnecessary. Removed as part of issue #829
//mydb->execute("DELETE FROM pgsql_servers");
//generate_pgsql_servers_table();
mydb->execute("INSERT OR IGNORE INTO pgsql_servers(hostgroup_id, hostname, port, weight, status, compression, max_connections, max_replication_lag, use_ssl, max_latency_ms, comment) SELECT hostgroup_id, hostname, port, weight, status, compression, max_connections, max_replication_lag, use_ssl, max_latency_ms, comment FROM pgsql_servers_incoming");
// SELECT FROM pgsql_servers whatever is not identical in pgsql_servers_incoming, or where mem_pointer=0 (where there is no pointer yet)
query=(char *)"SELECT t1.*, t2.weight, t2.status, t2.compression, t2.max_connections, t2.max_replication_lag, t2.use_ssl, t2.max_latency_ms, t2.comment FROM pgsql_servers t1 JOIN pgsql_servers_incoming t2 ON (t1.hostgroup_id=t2.hostgroup_id AND t1.hostname=t2.hostname AND t1.port=t2.port) WHERE mem_pointer=0 OR t1.weight<>t2.weight OR t1.status<>t2.status OR t1.compression<>t2.compression OR t1.max_connections<>t2.max_connections OR t1.max_replication_lag<>t2.max_replication_lag OR t1.use_ssl<>t2.use_ssl OR t1.max_latency_ms<>t2.max_latency_ms or t1.comment<>t2.comment";
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "%s\n", query);
mydb->execute_statement(query, &error , &cols , &affected_rows , &resultset);
if (error) {
proxy_error("Error on %s : %s\n", query, error);
} else {
if (GloPTH->variables.hostgroup_manager_verbose) {
proxy_info("Dumping pgsql_servers JOIN pgsql_servers_incoming\n");
resultset->dump_to_stderr();
}
// optimization #829
int rc;
sqlite3_stmt *statement1=NULL;
sqlite3_stmt *statement2=NULL;
//sqlite3 *mydb3=mydb->get_db();
char *query1=(char *)"UPDATE pgsql_servers SET mem_pointer = ?1 WHERE hostgroup_id = ?2 AND hostname = ?3 AND port = ?4";
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query1, -1, &statement1, 0);
rc = mydb->prepare_v2(query1, &statement1);
ASSERT_SQLITE_OK(rc, mydb);
char *query2=(char *)"UPDATE pgsql_servers SET weight = ?1 , status = ?2 , compression = ?3 , max_connections = ?4 , max_replication_lag = ?5 , use_ssl = ?6 , max_latency_ms = ?7 , comment = ?8 WHERE hostgroup_id = ?9 AND hostname = ?10 AND port = ?11";
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query2, -1, &statement2, 0);
rc = mydb->prepare_v2(query2, &statement2);
ASSERT_SQLITE_OK(rc, mydb);
for (std::vector<SQLite3_row *>::iterator it = resultset->rows.begin() ; it != resultset->rows.end(); ++it) {
SQLite3_row *r=*it;
long long ptr=atoll(r->fields[11]); // increase this index every time a new column is added
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Server %s:%d , weight=%d, status=%d, mem_pointer=%llu, hostgroup=%d, compression=%d\n", r->fields[1], atoi(r->fields[2]), atoi(r->fields[3]), (MySerStatus) atoi(r->fields[4]), ptr, atoi(r->fields[0]), atoi(r->fields[5]));
//fprintf(stderr,"%lld\n", ptr);
if (ptr==0) {
if (GloPTH->variables.hostgroup_manager_verbose) {
proxy_info("Creating new server in HG %d : %s:%d , weight=%d, status=%d\n", atoi(r->fields[0]), r->fields[1], atoi(r->fields[2]), atoi(r->fields[3]), (MySerStatus) atoi(r->fields[4]));
}
PgSQL_SrvC *mysrvc=new PgSQL_SrvC(r->fields[1], atoi(r->fields[2]), atoi(r->fields[3]), (MySerStatus) atoi(r->fields[4]), atoi(r->fields[5]), atoi(r->fields[6]), atoi(r->fields[7]), atoi(r->fields[8]), atoi(r->fields[9]), r->fields[10]); // add new fields here if adding more columns in pgsql_servers
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Adding new server %s:%d , weight=%d, status=%d, mem_ptr=%p into hostgroup=%d\n", r->fields[1], atoi(r->fields[2]), atoi(r->fields[3]), (MySerStatus) atoi(r->fields[4]), mysrvc, atoi(r->fields[0]));
add(mysrvc,atoi(r->fields[0]));
ptr=(uintptr_t)mysrvc;
rc=(*proxy_sqlite3_bind_int64)(statement1, 1, ptr); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 2, atoi(r->fields[0])); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement1, 3, r->fields[1], -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 4, atoi(r->fields[2])); ASSERT_SQLITE_OK(rc, mydb);
SAFE_SQLITE3_STEP2(statement1);
rc=(*proxy_sqlite3_clear_bindings)(statement1); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement1); ASSERT_SQLITE_OK(rc, mydb);
} else {
bool run_update=false;
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)ptr;
// carefully increase the 2nd index by 1 for every new column added
if (atoi(r->fields[3])!=atoi(r->fields[12])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Changing weight for server %d:%s:%d (%s:%d) from %d (%ld) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[3]) , mysrvc->weight , atoi(r->fields[12]));
mysrvc->weight=atoi(r->fields[12]);
}
if (atoi(r->fields[4])!=atoi(r->fields[13])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing status for server %d:%s:%d (%s:%d) from %d (%d) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[4]) , mysrvc->status , atoi(r->fields[13]));
mysrvc->status=(MySerStatus)atoi(r->fields[13]);
if (mysrvc->status==MYSQL_SERVER_STATUS_SHUNNED) {
mysrvc->shunned_automatic=false;
}
}
if (atoi(r->fields[5])!=atoi(r->fields[14])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing compression for server %d:%s:%d (%s:%d) from %d (%d) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[5]) , mysrvc->compression , atoi(r->fields[14]));
mysrvc->compression=atoi(r->fields[14]);
}
if (atoi(r->fields[6])!=atoi(r->fields[15])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing max_connections for server %d:%s:%d (%s:%d) from %d (%ld) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[6]) , mysrvc->max_connections , atoi(r->fields[15]));
mysrvc->max_connections=atoi(r->fields[15]);
}
if (atoi(r->fields[7])!=atoi(r->fields[16])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing max_replication_lag for server %u:%s:%d (%s:%d) from %d (%d) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[7]) , mysrvc->max_replication_lag , atoi(r->fields[16]));
mysrvc->max_replication_lag=atoi(r->fields[16]);
if (mysrvc->max_replication_lag == 0) { // we just changed it to 0
if (mysrvc->status == MYSQL_SERVER_STATUS_SHUNNED_REPLICATION_LAG) {
// the server is currently shunned due to replication lag
// but we reset max_replication_lag to 0
// therefore we immediately reset the status too
mysrvc->status = MYSQL_SERVER_STATUS_ONLINE;
}
}
}
if (atoi(r->fields[8])!=atoi(r->fields[17])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing use_ssl for server %d:%s:%d (%s:%d) from %d (%d) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[8]) , mysrvc->use_ssl , atoi(r->fields[17]));
mysrvc->use_ssl=atoi(r->fields[17]);
}
if (atoi(r->fields[9])!=atoi(r->fields[18])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing max_latency_ms for server %d:%s:%d (%s:%d) from %d (%d) to %d\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), atoi(r->fields[9]) , mysrvc->max_latency_us/1000 , atoi(r->fields[18]));
mysrvc->max_latency_us=1000*atoi(r->fields[18]);
}
if (strcmp(r->fields[10],r->fields[19])) {
if (GloPTH->variables.hostgroup_manager_verbose)
proxy_info("Changing comment for server %d:%s:%d (%s:%d) from '%s' to '%s'\n" , mysrvc->myhgc->hid , mysrvc->address, mysrvc->port, r->fields[1], atoi(r->fields[2]), r->fields[10], r->fields[19]);
free(mysrvc->comment);
mysrvc->comment=strdup(r->fields[19]);
}
if (run_update) {
rc=(*proxy_sqlite3_bind_int64)(statement2, 1, mysrvc->weight); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 2, mysrvc->status); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 3, mysrvc->compression); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 4, mysrvc->max_connections); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 5, mysrvc->max_replication_lag); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 6, mysrvc->use_ssl); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 7, mysrvc->max_latency_us/1000); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement2, 8, mysrvc->comment, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 9, mysrvc->myhgc->hid); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement2, 10, mysrvc->address, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement2, 11, mysrvc->port); ASSERT_SQLITE_OK(rc, mydb);
SAFE_SQLITE3_STEP2(statement2);
rc=(*proxy_sqlite3_clear_bindings)(statement2); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement2); ASSERT_SQLITE_OK(rc, mydb);
}
}
}
(*proxy_sqlite3_finalize)(statement1);
(*proxy_sqlite3_finalize)(statement2);
}
if (resultset) { delete resultset; resultset=NULL; }
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "DELETE FROM pgsql_servers_incoming\n");
mydb->execute("DELETE FROM pgsql_servers_incoming");
string global_checksum_v2 {};
if (only_commit_runtime_pgsql_servers == false) {
// replication
if (incoming_replication_hostgroups) { // this IF is extremely important, otherwise replication hostgroups may disappear
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "DELETE FROM pgsql_replication_hostgroups\n");
mydb->execute("DELETE FROM pgsql_replication_hostgroups");
generate_pgsql_replication_hostgroups_table();
}
// hostgroup attributes
if (incoming_hostgroup_attributes) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "DELETE FROM pgsql_hostgroup_attributes\n");
mydb->execute("DELETE FROM pgsql_hostgroup_attributes");
generate_pgsql_hostgroup_attributes_table();
}
uint64_t new_hash = commit_update_checksum_from_pgsql_servers_v2(peer_pgsql_servers_v2.resultset);
{
const string new_checksum { get_checksum_from_hash(new_hash) };
proxy_info("Checksum for table %s is %s\n", "pgsql_servers_v2", new_checksum.c_str());
}
global_checksum_v2 = gen_global_pgsql_servers_v2_checksum(new_hash);
proxy_info("New computed global checksum for 'pgsql_servers_v2' is '%s'\n", global_checksum_v2.c_str());
}
// Update 'pgsql_servers' and global checksums
{
uint64_t new_hash = commit_update_checksum_from_pgsql_servers(peer_runtime_pgsql_servers.resultset);
const string new_checksum { get_checksum_from_hash(new_hash) };
proxy_info("Checksum for table %s is %s\n", "pgsql_servers", new_checksum.c_str());
pthread_mutex_lock(&GloVars.checksum_mutex);
if (only_commit_runtime_pgsql_servers == false) {
update_glovars_pgsql_servers_v2_checksum(global_checksum_v2, peer_pgsql_servers_v2.checksum, true);
}
update_glovars_pgsql_servers_checksum(new_checksum, peer_runtime_pgsql_servers.checksum, update_version);
pthread_mutex_unlock(&GloVars.checksum_mutex);
}
// fill Hostgroup_Manager_Mapping with latest records
update_hostgroup_manager_mappings();
__sync_fetch_and_add(&status.servers_table_version,1);
// We completely reset read_only_set1. It will generated (completely) again in read_only_action()
// Note: read_only_set1 will be regenerated all at once
read_only_set1.erase(read_only_set1.begin(), read_only_set1.end());
// We completely reset read_only_set2. It will be again written in read_only_action()
// Note: read_only_set2 will be regenerated one server at the time
read_only_set2.erase(read_only_set2.begin(), read_only_set2.end());
this->status.p_counter_array[PgSQL_p_hg_counter::servers_table_version]->Increment();
pthread_cond_broadcast(&status.servers_table_version_cond);
pthread_mutex_unlock(&status.servers_table_version_lock);
// NOTE: In order to guarantee the latest generated version, this should be kept after all the
// calls to 'generate_pgsql_servers'.
update_table_pgsql_servers_for_monitor(false);
wrunlock();
unsigned long long curtime2=monotonic_time();
curtime1 = curtime1/1000;
curtime2 = curtime2/1000;
proxy_info("PgSQL_HostGroups_Manager::commit() locked for %llums\n", curtime2-curtime1);
if (GloPTH) {
GloPTH->signal_all_threads(1);
}
return true;
}
/**
* @brief Calculate the checksum for the runtime pgsql_servers record, after excluding all the rows
* with the status OFFLINE_HARD from the result set
*
* @details The runtime pgsql_servers is now considered as a distinct module and have a separate checksum calculation.
* This is because the records in the runtime module may differ from those in the admin pgsql_servers module, which
* can cause synchronization issues within the cluster.
*
* @param runtime_pgsql_servers resultset of runtime pgsql_servers or can be a nullptr.
*/
uint64_t PgSQL_HostGroups_Manager::get_pgsql_servers_checksum(SQLite3_result* runtime_pgsql_servers) {
//Note: GloVars.checksum_mutex needs to be locked
SQLite3_result* resultset = nullptr;
if (runtime_pgsql_servers == nullptr) {
char* error = NULL;
int cols = 0;
int affected_rows = 0;
mydb->execute_statement(PGHGM_GEN_CLUSTER_ADMIN_RUNTIME_SERVERS, &error, &cols, &affected_rows, &resultset);
if (resultset) {
save_runtime_pgsql_servers(resultset);
} else {
proxy_info("Checksum for table %s is 0x%lX\n", "pgsql_servers", (long unsigned int)0);
}
} else {
resultset = runtime_pgsql_servers;
save_runtime_pgsql_servers(runtime_pgsql_servers);
}
table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS] = resultset != nullptr ? resultset->raw_checksum() : 0;
proxy_info("Checksum for table %s is 0x%lX\n", "pgsql_servers", table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS]);
return table_resultset_checksum[HGM_TABLES::PgSQL_SERVERS];
}
void PgSQL_HostGroups_Manager::purge_pgsql_servers_table() {
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
PgSQL_SrvC *mysrvc=NULL;
for (unsigned int j=0; j<myhgc->mysrvs->servers->len; j++) {
mysrvc=myhgc->mysrvs->idx(j);
if (mysrvc->status==MYSQL_SERVER_STATUS_OFFLINE_HARD) {
if (mysrvc->ConnectionsUsed->conns_length()==0 && mysrvc->ConnectionsFree->conns_length()==0) {
// no more connections for OFFLINE_HARD server, removing it
mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->remove_index_fast(j);
j--;
delete mysrvc;
}
}
}
}
}
void PgSQL_HostGroups_Manager::generate_pgsql_servers_table(int *_onlyhg) {
int rc;
sqlite3_stmt *statement1=NULL;
sqlite3_stmt *statement32=NULL;
PtrArray *lst=new PtrArray();
//sqlite3 *mydb3=mydb->get_db();
char *query1=(char *)"INSERT INTO pgsql_servers VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12)";
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query1, -1, &statement1, 0);
rc = mydb->prepare_v2(query1, &statement1);
ASSERT_SQLITE_OK(rc, mydb);
std::string query32s = "INSERT INTO pgsql_servers VALUES " + generate_multi_rows_query(32,12);
char *query32 = (char *)query32s.c_str();
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query32, -1, &statement32, 0);
rc = mydb->prepare_v2(query32, &statement32);
ASSERT_SQLITE_OK(rc, mydb);
if (pgsql_thread___hostgroup_manager_verbose) {
if (_onlyhg==NULL) {
proxy_info("Dumping current PgSQL Servers structures for hostgroup ALL\n");
} else {
int hidonly=*_onlyhg;
proxy_info("Dumping current PgSQL Servers structures for hostgroup %d\n", hidonly);
}
}
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
if (_onlyhg) {
int hidonly=*_onlyhg;
if (myhgc->hid!=(unsigned int)hidonly) {
// skipping this HG
continue;
}
}
PgSQL_SrvC *mysrvc=NULL;
for (unsigned int j=0; j<myhgc->mysrvs->servers->len; j++) {
mysrvc=myhgc->mysrvs->idx(j);
if (pgsql_thread___hostgroup_manager_verbose) {
char *st;
switch (mysrvc->status) {
case 0:
st=(char *)"ONLINE";
break;
case 2:
st=(char *)"OFFLINE_SOFT";
break;
case 3:
st=(char *)"OFFLINE_HARD";
break;
default:
case 1:
case 4:
st=(char *)"SHUNNED";
break;
}
fprintf(stderr,"HID: %d , address: %s , port: %d , weight: %ld , status: %s , max_connections: %ld , max_replication_lag: %u , use_ssl: %u , max_latency_ms: %u , comment: %s\n", mysrvc->myhgc->hid, mysrvc->address, mysrvc->port, mysrvc->weight, st, mysrvc->max_connections, mysrvc->max_replication_lag, mysrvc->use_ssl, mysrvc->max_latency_us*1000, mysrvc->comment);
}
lst->add(mysrvc);
if (lst->len==32) {
while (lst->len) {
int i=lst->len;
i--;
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)lst->remove_index_fast(0);
uintptr_t ptr=(uintptr_t)mysrvc;
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+1, mysrvc->myhgc->hid); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement32, (i*12)+2, mysrvc->address, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+3, mysrvc->port); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+4, mysrvc->weight); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+5, mysrvc->status); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+6, mysrvc->compression); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+7, mysrvc->max_connections); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+8, mysrvc->max_replication_lag); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+9, mysrvc->use_ssl); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+10, mysrvc->max_latency_us/1000); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement32, (i*12)+11, mysrvc->comment, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement32, (i*12)+12, ptr); ASSERT_SQLITE_OK(rc, mydb);
}
SAFE_SQLITE3_STEP2(statement32);
rc=(*proxy_sqlite3_clear_bindings)(statement32); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement32); ASSERT_SQLITE_OK(rc, mydb);
}
}
}
while (lst->len) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)lst->remove_index_fast(0);
uintptr_t ptr=(uintptr_t)mysrvc;
rc=(*proxy_sqlite3_bind_int64)(statement1, 1, mysrvc->myhgc->hid); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement1, 2, mysrvc->address, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 3, mysrvc->port); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 4, mysrvc->weight); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 5, mysrvc->status); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 6, mysrvc->compression); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 7, mysrvc->max_connections); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 8, mysrvc->max_replication_lag); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 9, mysrvc->use_ssl); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 10, mysrvc->max_latency_us/1000); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement1, 11, mysrvc->comment, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement1, 12, ptr); ASSERT_SQLITE_OK(rc, mydb);
SAFE_SQLITE3_STEP2(statement1);
rc=(*proxy_sqlite3_clear_bindings)(statement1); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement1); ASSERT_SQLITE_OK(rc, mydb);
}
(*proxy_sqlite3_finalize)(statement1);
(*proxy_sqlite3_finalize)(statement32);
if (pgsql_thread___hostgroup_manager_verbose) {
char *error=NULL;
int cols=0;
int affected_rows=0;
SQLite3_result *resultset=NULL;
if (_onlyhg==NULL) {
mydb->execute_statement((char *)"SELECT hostgroup_id hid, hostname, port, weight, status, compression cmp, max_connections max_conns, max_replication_lag max_lag, use_ssl ssl, max_latency_ms max_lat, comment, mem_pointer FROM pgsql_servers", &error , &cols , &affected_rows , &resultset);
} else {
int hidonly=*_onlyhg;
char *q1 = (char *)malloc(256);
sprintf(q1,"SELECT hostgroup_id hid, hostname, port, weight, status, compression cmp, max_connections max_conns, max_replication_lag max_lag, use_ssl ssl, max_latency_ms max_lat, comment, mem_pointer FROM pgsql_servers WHERE hostgroup_id=%d" , hidonly);
mydb->execute_statement(q1, &error , &cols , &affected_rows , &resultset);
free(q1);
}
if (error) {
proxy_error("Error on read from pgsql_servers : %s\n", error);
} else {
if (resultset) {
if (_onlyhg==NULL) {
proxy_info("Dumping pgsql_servers: ALL\n");
} else {
int hidonly=*_onlyhg;
proxy_info("Dumping pgsql_servers: HG %d\n", hidonly);
}
resultset->dump_to_stderr();
}
}
if (resultset) { delete resultset; resultset=NULL; }
}
delete lst;
}
void PgSQL_HostGroups_Manager::generate_pgsql_replication_hostgroups_table() {
if (incoming_replication_hostgroups==NULL)
return;
if (pgsql_thread___hostgroup_manager_verbose) {
proxy_info("New pgsql_replication_hostgroups table\n");
}
for (std::vector<SQLite3_row *>::iterator it = incoming_replication_hostgroups->rows.begin() ; it != incoming_replication_hostgroups->rows.end(); ++it) {
SQLite3_row *r=*it;
char *o=NULL;
int comment_length=0; // #issue #643
//if (r->fields[3]) { // comment is not null
o=escape_string_single_quotes(r->fields[3],false);
comment_length=strlen(o);
//}
char *query=(char *)malloc(256+comment_length);
//if (r->fields[3]) { // comment is not null
sprintf(query,"INSERT INTO pgsql_replication_hostgroups VALUES(%s,%s,'%s','%s')",r->fields[0], r->fields[1], r->fields[2], o);
if (o!=r->fields[3]) { // there was a copy
free(o);
}
//} else {
//sprintf(query,"INSERT INTO pgsql_replication_hostgroups VALUES(%s,%s,NULL)",r->fields[0],r->fields[1]);
//}
mydb->execute(query);
if (pgsql_thread___hostgroup_manager_verbose) {
fprintf(stderr,"writer_hostgroup: %s , reader_hostgroup: %s, check_type %s, comment: %s\n", r->fields[0],r->fields[1], r->fields[2], r->fields[3]);
}
free(query);
}
incoming_replication_hostgroups=NULL;
}
void PgSQL_HostGroups_Manager::update_table_pgsql_servers_for_monitor(bool lock) {
if (lock) {
wrlock();
}
std::lock_guard<std::mutex> pgsql_servers_lock(this->pgsql_servers_to_monitor_mutex);
char* error = NULL;
int cols = 0;
int affected_rows = 0;
SQLite3_result* resultset = NULL;
char* query = const_cast<char*>("SELECT hostname, port, status, use_ssl FROM pgsql_servers WHERE status != 3 GROUP BY hostname, port");
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "%s\n", query);
mydb->execute_statement(query, &error , &cols , &affected_rows , &resultset);
if (error != nullptr) {
proxy_error("Error on read from pgsql_servers : %s\n", error);
} else {
if (resultset != nullptr) {
delete this->pgsql_servers_to_monitor;
this->pgsql_servers_to_monitor = resultset;
}
}
if (lock) {
wrunlock();
}
MySQL_Monitor::trigger_dns_cache_update();
}
SQLite3_result * PgSQL_HostGroups_Manager::dump_table_pgsql(const string& name) {
char * query = (char *)"";
if (name == "pgsql_replication_hostgroups") {
query=(char *)"SELECT writer_hostgroup, reader_hostgroup, check_type, comment FROM pgsql_replication_hostgroups";
} else if (name == "pgsql_hostgroup_attributes") {
query=(char *)"SELECT hostgroup_id, max_num_online_servers, autocommit, free_connections_pct, init_connect, multiplex, connection_warming, throttle_connections_per_sec, ignore_session_variables, hostgroup_settings, servers_defaults, comment FROM pgsql_hostgroup_attributes ORDER BY hostgroup_id";
} else if (name == "pgsql_servers") {
query = (char *)PGHGM_GEN_ADMIN_RUNTIME_SERVERS;
} else if (name == "cluster_pgsql_servers") {
query = (char *)PGHGM_GEN_CLUSTER_ADMIN_RUNTIME_SERVERS;
} else {
assert(0);
}
wrlock();
if (name == "pgsql_servers") {
purge_pgsql_servers_table();
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "DELETE FROM pgsql_servers\n");
mydb->execute("DELETE FROM pgsql_servers");
generate_pgsql_servers_table();
}
char *error=NULL;
int cols=0;
int affected_rows=0;
SQLite3_result *resultset=NULL;
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "%s\n", query);
mydb->execute_statement(query, &error , &cols , &affected_rows , &resultset);
wrunlock();
return resultset;
}
void PgSQL_HostGroups_Manager::increase_reset_counter() {
wrlock();
status.pgconnpoll_reset++;
wrunlock();
}
void PgSQL_HostGroups_Manager::push_MyConn_to_pool(PgSQL_Connection *c, bool _lock) {
assert(c->parent);
PgSQL_SrvC *mysrvc=NULL;
if (_lock)
wrlock();
c->auto_increment_delay_token = 0;
status.pgconnpoll_push++;
mysrvc=(PgSQL_SrvC *)c->parent;
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PgSQL_Connection %p, server %s:%d with status %d\n", c, mysrvc->address, mysrvc->port, mysrvc->status);
mysrvc->ConnectionsUsed->remove(c);
if (GloPTH == NULL) { goto __exit_push_MyConn_to_pool; }
if (c->largest_query_length > (unsigned int)GloPTH->variables.threshold_query_length) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying PgSQL_Connection %p, server %s:%d with status %d . largest_query_length = %lu\n", c, mysrvc->address, mysrvc->port, mysrvc->status, c->largest_query_length);
delete c;
goto __exit_push_MyConn_to_pool;
}
if (mysrvc->status==MYSQL_SERVER_STATUS_ONLINE) {
if (c->async_state_machine==ASYNC_IDLE) {
if (GloPTH == NULL) { goto __exit_push_MyConn_to_pool; }
if (c->local_stmts->get_num_backend_stmts() > (unsigned int)GloPTH->variables.max_stmts_per_connection) { // Check if the connection has too many prepared statements
// Log debug information about destroying the connection due to too many prepared statements
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying PgSQL_Connection %p, server %s:%d with status %d because has too many prepared statements\n", c, mysrvc->address, mysrvc->port, (int)mysrvc->status);
mysrvc->ConnectionsUsed->add(c); // Add the connection back to the list of used connections
destroy_MyConn_from_pool(c, false); // Destroy the connection from the pool
} else {
mysrvc->ConnectionsFree->add(c); // Add the connection to the list of free connections
}
} else {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying PgSQL_Connection %p, server %s:%d with status %d\n", c, mysrvc->address, mysrvc->port, mysrvc->status);
delete c;
}
} else {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying PgSQL_Connection %p, server %s:%d with status %d\n", c, mysrvc->address, mysrvc->port, mysrvc->status);
delete c;
}
__exit_push_MyConn_to_pool:
if (_lock)
wrunlock();
}
void PgSQL_HostGroups_Manager::push_MyConn_to_pool_array(PgSQL_Connection **ca, unsigned int cnt) {
unsigned int i=0;
PgSQL_Connection *c=NULL;
c=ca[i];
wrlock();
while (i<cnt) {
push_MyConn_to_pool(c,false);
i++;
if (i<cnt)
c=ca[i];
}
wrunlock();
}
PgSQL_SrvC *PgSQL_HGC::get_random_MySrvC(char * gtid_uuid, uint64_t gtid_trxid, int max_lag_ms, PgSQL_Session *sess) {
PgSQL_SrvC *mysrvc=NULL;
unsigned int j;
unsigned int sum=0;
unsigned int TotalUsedConn=0;
unsigned int l=mysrvs->cnt();
static time_t last_hg_log = 0;
#ifdef TEST_AURORA
unsigned long long a1 = array_mysrvc_total/10000;
array_mysrvc_total += l;
unsigned long long a2 = array_mysrvc_total/10000;
if (a2 > a1) {
fprintf(stderr, "Total: %llu, Candidates: %llu\n", array_mysrvc_total-l, array_mysrvc_cands);
}
#endif // TEST_AURORA
PgSQL_SrvC *mysrvcCandidates_static[32];
PgSQL_SrvC **mysrvcCandidates = mysrvcCandidates_static;
unsigned int num_candidates = 0;
bool max_connections_reached = false;
if (l>32) {
mysrvcCandidates = (PgSQL_SrvC **)malloc(sizeof(PgSQL_SrvC *)*l);
}
if (l) {
//int j=0;
for (j=0; j<l; j++) {
mysrvc=mysrvs->idx(j);
if (mysrvc->status==MYSQL_SERVER_STATUS_ONLINE) { // consider this server only if ONLINE
if (mysrvc->ConnectionsUsed->conns_length() < mysrvc->max_connections) { // consider this server only if didn't reach max_connections
if ( mysrvc->current_latency_us < ( mysrvc->max_latency_us ? mysrvc->max_latency_us : pgsql_thread___default_max_latency_ms *1000 ) ) { // consider the host only if not too far
if (gtid_trxid) {
#if 0
if (PgHGM->gtid_exists(mysrvc, gtid_uuid, gtid_trxid)) {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
#endif // 0
} else {
if (max_lag_ms >= 0) {
if ((unsigned int)max_lag_ms >= mysrvc->aws_aurora_current_lag_us/1000) {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
} else {
sess->thread->status_variables.stvar[st_var_aws_aurora_replicas_skipped_during_query]++;
}
} else {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
}
}
} else {
max_connections_reached = true;
}
} else {
if (mysrvc->status==MYSQL_SERVER_STATUS_SHUNNED) {
// try to recover shunned servers
if (mysrvc->shunned_automatic && pgsql_thread___shun_recovery_time_sec) {
time_t t;
t=time(NULL);
// we do all these changes without locking . We assume the server is not used from long
// even if the server is still in used and any of the follow command fails it is not critical
// because this is only an attempt to recover a server that is probably dead anyway
// the next few lines of code try to solve issue #530
int max_wait_sec = (pgsql_thread___shun_recovery_time_sec * 1000 >= pgsql_thread___connect_timeout_server_max ? pgsql_thread___connect_timeout_server_max /1000 - 1 : pgsql_thread___shun_recovery_time_sec);
if (max_wait_sec < 1) { // min wait time should be at least 1 second
max_wait_sec = 1;
}
if (t > mysrvc->time_last_detected_error && (t - mysrvc->time_last_detected_error) > max_wait_sec) {
if (
(mysrvc->shunned_and_kill_all_connections==false) // it is safe to bring it back online
||
(mysrvc->shunned_and_kill_all_connections==true && mysrvc->ConnectionsUsed->conns_length()==0 && mysrvc->ConnectionsFree->conns_length()==0) // if shunned_and_kill_all_connections is set, ensure all connections are already dropped
) {
#ifdef DEBUG
if (GloPTH->variables.hostgroup_manager_verbose >= 3) {
proxy_info("Unshunning server %s:%d.\n", mysrvc->address, mysrvc->port);
}
#endif
mysrvc->status=MYSQL_SERVER_STATUS_ONLINE;
mysrvc->shunned_automatic=false;
mysrvc->shunned_and_kill_all_connections=false;
mysrvc->connect_ERR_at_time_last_detected_error=0;
mysrvc->time_last_detected_error=0;
// note: the following function scans all the hostgroups.
// This is ok for now because we only have a global mutex.
// If one day we implement a mutex per hostgroup (unlikely,
// but possible), this must be taken into consideration
if (pgsql_thread___unshun_algorithm == 1) {
PgHGM->unshun_server_all_hostgroups(mysrvc->address, mysrvc->port, t, max_wait_sec, &mysrvc->myhgc->hid);
}
// if a server is taken back online, consider it immediately
if ( mysrvc->current_latency_us < ( mysrvc->max_latency_us ? mysrvc->max_latency_us : pgsql_thread___default_max_latency_ms *1000 ) ) { // consider the host only if not too far
if (gtid_trxid) {
#if 0
if (PgHGM->gtid_exists(mysrvc, gtid_uuid, gtid_trxid)) {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
#endif // 0
} else {
if (max_lag_ms >= 0) {
if ((unsigned int)max_lag_ms >= mysrvc->aws_aurora_current_lag_us/1000) {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
} else {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
}
}
}
}
}
}
}
}
if (max_lag_ms > 0) { // we are using AWS Aurora, as this logic is implemented only here
unsigned int min_num_replicas = sess->thread->variables.aurora_max_lag_ms_only_read_from_replicas;
if (min_num_replicas) {
if (num_candidates >= min_num_replicas) { // there are at least N replicas
// we try to remove the writer
unsigned int total_aws_aurora_current_lag_us=0;
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
total_aws_aurora_current_lag_us += mysrvc->aws_aurora_current_lag_us;
}
if (total_aws_aurora_current_lag_us) { // we are just double checking that we don't have all servers with aws_aurora_current_lag_us==0
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
if (mysrvc->aws_aurora_current_lag_us==0) {
sum-=mysrvc->weight;
TotalUsedConn-=mysrvc->ConnectionsUsed->conns_length();
if (j < num_candidates-1) {
mysrvcCandidates[j]=mysrvcCandidates[num_candidates-1];
}
num_candidates--;
}
}
}
}
}
}
if (sum==0) {
// per issue #531 , we try a desperate attempt to bring back online any shunned server
// we do this lowering the maximum wait time to 10%
// most of the follow code is copied from few lines above
time_t t;
t=time(NULL);
int max_wait_sec = (pgsql_thread___shun_recovery_time_sec * 1000 >= pgsql_thread___connect_timeout_server_max ? pgsql_thread___connect_timeout_server_max /10000 - 1 : pgsql_thread___shun_recovery_time_sec /10 );
if (max_wait_sec < 1) { // min wait time should be at least 1 second
max_wait_sec = 1;
}
if (t - last_hg_log > 1) { // log this at most once per second to avoid spamming the logs
last_hg_log = time(NULL);
if (gtid_trxid) {
proxy_error("Hostgroup %u has no servers ready for GTID '%s:%ld'. Waiting for replication...\n", hid, gtid_uuid, gtid_trxid);
} else {
proxy_error("Hostgroup %u has no servers available%s! Checking servers shunned for more than %u second%s\n", hid,
(max_connections_reached ? " or max_connections reached for all servers" : ""), max_wait_sec, max_wait_sec == 1 ? "" : "s");
}
}
for (j=0; j<l; j++) {
mysrvc=mysrvs->idx(j);
if (mysrvc->status==MYSQL_SERVER_STATUS_SHUNNED && mysrvc->shunned_automatic==true) {
if ((t - mysrvc->time_last_detected_error) > max_wait_sec) {
mysrvc->status=MYSQL_SERVER_STATUS_ONLINE;
mysrvc->shunned_automatic=false;
mysrvc->connect_ERR_at_time_last_detected_error=0;
mysrvc->time_last_detected_error=0;
// if a server is taken back online, consider it immediately
if ( mysrvc->current_latency_us < ( mysrvc->max_latency_us ? mysrvc->max_latency_us : pgsql_thread___default_max_latency_ms *1000 ) ) { // consider the host only if not too far
if (gtid_trxid) {
#if 0
if (PgHGM->gtid_exists(mysrvc, gtid_uuid, gtid_trxid)) {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
#endif // 0
} else {
if (max_lag_ms >= 0) {
if ((unsigned int)max_lag_ms >= mysrvc->aws_aurora_current_lag_us/1000) {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
} else {
sum+=mysrvc->weight;
TotalUsedConn+=mysrvc->ConnectionsUsed->conns_length();
mysrvcCandidates[num_candidates]=mysrvc;
num_candidates++;
}
}
}
}
}
}
}
if (sum==0) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PgSQL_SrvC NULL because no backend ONLINE or with weight\n");
if (l>32) {
free(mysrvcCandidates);
}
#ifdef TEST_AURORA
array_mysrvc_cands += num_candidates;
#endif // TEST_AURORA
return NULL; // if we reach here, we couldn't find any target
}
/*
unsigned int New_sum=0;
unsigned int New_TotalUsedConn=0;
// we will now scan again to ignore overloaded servers
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
unsigned int len=mysrvc->ConnectionsUsed->conns_length();
if ((len * sum) <= (TotalUsedConn * mysrvc->weight * 1.5 + 1)) {
New_sum+=mysrvc->weight;
New_TotalUsedConn+=len;
} else {
// remove the candidate
if (j+1 < num_candidates) {
mysrvcCandidates[j] = mysrvcCandidates[num_candidates-1];
}
j--;
num_candidates--;
}
}
*/
unsigned int New_sum=sum;
if (New_sum==0) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PgSQL_SrvC NULL because no backend ONLINE or with weight\n");
if (l>32) {
free(mysrvcCandidates);
}
#ifdef TEST_AURORA
array_mysrvc_cands += num_candidates;
#endif // TEST_AURORA
return NULL; // if we reach here, we couldn't find any target
}
// latency awareness algorithm is enabled only when compiled with USE_MYSRVC_ARRAY
if (sess && sess->thread->variables.min_num_servers_lantency_awareness) {
if ((int) num_candidates >= sess->thread->variables.min_num_servers_lantency_awareness) {
unsigned int servers_with_latency = 0;
unsigned int total_latency_us = 0;
// scan and verify that all servers have some latency
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
if (mysrvc->current_latency_us) {
servers_with_latency++;
total_latency_us += mysrvc->current_latency_us;
}
}
if (servers_with_latency == num_candidates) {
// all servers have some latency.
// That is good. If any server have no latency, something is wrong
// and we will skip this algorithm
sess->thread->status_variables.stvar[st_var_ConnPool_get_conn_latency_awareness]++;
unsigned int avg_latency_us = 0;
avg_latency_us = total_latency_us/num_candidates;
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
if (mysrvc->current_latency_us > avg_latency_us) {
// remove the candidate
if (j+1 < num_candidates) {
mysrvcCandidates[j] = mysrvcCandidates[num_candidates-1];
}
j--;
num_candidates--;
}
}
// we scan again to adjust weight
New_sum = 0;
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
New_sum+=mysrvc->weight;
}
}
}
}
unsigned int k;
if (New_sum > 32768) {
k=rand()%New_sum;
} else {
k=fastrand()%New_sum;
}
k++;
New_sum=0;
for (j=0; j<num_candidates; j++) {
mysrvc = mysrvcCandidates[j];
New_sum+=mysrvc->weight;
if (k<=New_sum) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PgSQL_SrvC %p, server %s:%d\n", mysrvc, mysrvc->address, mysrvc->port);
if (l>32) {
free(mysrvcCandidates);
}
#ifdef TEST_AURORA
array_mysrvc_cands += num_candidates;
#endif // TEST_AURORA
return mysrvc;
}
}
} else {
time_t t = time(NULL);
if (t - last_hg_log > 1) {
last_hg_log = time(NULL);
proxy_error("Hostgroup %u has no servers available!\n", hid);
}
}
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PgSQL_SrvC NULL\n");
if (l>32) {
free(mysrvcCandidates);
}
#ifdef TEST_AURORA
array_mysrvc_cands += num_candidates;
#endif // TEST_AURORA
return NULL; // if we reach here, we couldn't find any target
}
//unsigned int PgSQL_SrvList::cnt() {
// return servers->len;
//}
//PgSQL_SrvC * PgSQL_SrvList::idx(unsigned int i) { return (PgSQL_SrvC *)servers->index(i); }
void PgSQL_SrvConnList::get_random_MyConn_inner_search(unsigned int start, unsigned int end, unsigned int& conn_found_idx, unsigned int& connection_quality_level, unsigned int& number_of_matching_session_variables, const PgSQL_Connection * client_conn) {
PgSQL_Connection * conn=NULL;
unsigned int k;
for (k = start; k < end; k++) {
conn = (PgSQL_Connection *)conns->index(k);
if (conn->has_same_connection_options(client_conn)) {
if (connection_quality_level == 0) {
// this is our best candidate so far
connection_quality_level = 1;
conn_found_idx = k;
}
if (conn->requires_RESETTING_CONNECTION(client_conn)==false) {
if (connection_quality_level == 1) {
// this is our best candidate so far
connection_quality_level = 2;
conn_found_idx = k;
}
unsigned int cnt_match = 0; // number of matching session variables
unsigned int not_match = 0; // number of not matching session variables
cnt_match = conn->number_of_matching_session_variables(client_conn, not_match);
if (not_match==0) {
// it seems we found the perfect connection
number_of_matching_session_variables = cnt_match;
connection_quality_level = 3;
conn_found_idx = k;
return; // exit immediately, we found the perfect connection
} else {
// we didn't find the perfect connection
// but maybe is better than what we have so far?
if (cnt_match > number_of_matching_session_variables) {
// this is our best candidate so far
number_of_matching_session_variables = cnt_match;
conn_found_idx = k;
}
}
} else {
/*if (connection_quality_level == 1) {
int rca = pgsql_thread___reset_connection_algorithm;
if (rca==1) {
int ql = GloPTH->variables.connpoll_reset_queue_length;
if (ql==0) {
// if:
// pgsql-reset_connection_algorithm=1 and
// pgsql-connpoll_reset_queue_length=0
// we will not return a connection with connection_quality_level == 1
// because we want to run COM_CHANGE_USER
// This change was introduced to work around Galera bug
// https://github.com/codership/galera/issues/613
connection_quality_level = 0;
}
}
}
*/
}
}
}
}
PgSQL_Connection * PgSQL_SrvConnList::get_random_MyConn(PgSQL_Session *sess, bool ff) {
PgSQL_Connection * conn=NULL;
unsigned int i;
unsigned int conn_found_idx;
unsigned int l=conns_length();
unsigned int connection_quality_level = 0;
bool needs_warming = false;
// connection_quality_level:
// 0 : not found any good connection, tracked options are not OK
// 1 : tracked options are OK , but RESETTING SESSION is required
// 2 : tracked options are OK , RESETTING SESSION is not required, but some SET statement or INIT_DB needs to be executed
// 3 : tracked options are OK , RESETTING SESSION is not required, and it seems that SET statements or INIT_DB ARE not required
unsigned int number_of_matching_session_variables = 0; // this includes session variables AND schema
bool connection_warming = pgsql_thread___connection_warming;
int free_connections_pct = pgsql_thread___free_connections_pct;
if (mysrvc->myhgc->attributes.configured == true) {
// pgsql_hostgroup_attributes takes priority
connection_warming = mysrvc->myhgc->attributes.connection_warming;
free_connections_pct = mysrvc->myhgc->attributes.free_connections_pct;
}
if (connection_warming == true) {
unsigned int total_connections = mysrvc->ConnectionsFree->conns_length()+mysrvc->ConnectionsUsed->conns_length();
unsigned int expected_warm_connections = free_connections_pct*mysrvc->max_connections/100;
if (total_connections < expected_warm_connections) {
needs_warming = true;
}
}
if (l && ff==false && needs_warming==false) {
if (l>32768) {
i=rand()%l;
} else {
i=fastrand()%l;
}
if (sess && sess->client_myds && sess->client_myds->myconn && sess->client_myds->myconn->userinfo) {
PgSQL_Connection * client_conn = sess->client_myds->myconn;
get_random_MyConn_inner_search(i, l, conn_found_idx, connection_quality_level, number_of_matching_session_variables, client_conn);
if (connection_quality_level !=3 ) { // we didn't find the perfect connection
get_random_MyConn_inner_search(0, i, conn_found_idx, connection_quality_level, number_of_matching_session_variables, client_conn);
}
// connection_quality_level:
// 1 : tracked options are OK , but RESETTING SESSION is required
// 2 : tracked options are OK , RESETTING SESSION is not required, but some SET statement or INIT_DB needs to be executed
switch (connection_quality_level) {
case 0: // not found any good connection, tracked options are not OK
// we must check if connections need to be freed before
// creating a new connection
{
unsigned int conns_free = mysrvc->ConnectionsFree->conns_length();
unsigned int conns_used = mysrvc->ConnectionsUsed->conns_length();
unsigned int pct_max_connections = (3 * mysrvc->max_connections) / 4;
unsigned int connections_to_free = 0;
if (conns_free >= 1) {
// connection cleanup is triggered when connections exceed 3/4 of the total
// allowed max connections, this cleanup ensures that at least *one connection*
// will be freed.
if (pct_max_connections <= (conns_free + conns_used)) {
connections_to_free = (conns_free + conns_used) - pct_max_connections;
if (connections_to_free == 0) connections_to_free = 1;
}
while (conns_free && connections_to_free) {
PgSQL_Connection* conn = mysrvc->ConnectionsFree->remove(0);
delete conn;
conns_free = mysrvc->ConnectionsFree->conns_length();
connections_to_free -= 1;
}
}
// we must create a new connection
conn = new PgSQL_Connection(false);
conn->parent=mysrvc;
// if attributes.multiplex == true , STATUS_PGSQL_CONNECTION_NO_MULTIPLEX_HG is set to false. And vice-versa
conn->set_status(!conn->parent->myhgc->attributes.multiplex, STATUS_PGSQL_CONNECTION_NO_MULTIPLEX_HG);
__sync_fetch_and_add(&PgHGM->status.server_connections_created, 1);
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PostgreSQL Connection %p, server %s:%d\n", conn, conn->parent->address, conn->parent->port);
}
break;
case 1: //tracked options are OK , but RESETTING SESSION is required
// we may consider creating a new connection
{
unsigned int conns_free = mysrvc->ConnectionsFree->conns_length();
unsigned int conns_used = mysrvc->ConnectionsUsed->conns_length();
if ((conns_used > conns_free) && (mysrvc->max_connections > (conns_free/2 + conns_used/2)) ) {
conn = new PgSQL_Connection(false);
conn->parent=mysrvc;
// if attributes.multiplex == true , STATUS_PGSQL_CONNECTION_NO_MULTIPLEX_HG is set to false. And vice-versa
conn->set_status(!conn->parent->myhgc->attributes.multiplex, STATUS_PGSQL_CONNECTION_NO_MULTIPLEX_HG);
__sync_fetch_and_add(&PgHGM->status.server_connections_created, 1);
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PostgreSQL Connection %p, server %s:%d\n", conn, conn->parent->address, conn->parent->port);
} else {
conn=(PgSQL_Connection *)conns->remove_index_fast(conn_found_idx);
}
}
break;
case 2: // tracked options are OK , RESETTING SESSION is not required, but some SET statement or INIT_DB needs to be executed
case 3: // tracked options are OK , RESETTING SESSION is not required, and it seems that SET statements or INIT_DB ARE not required
// here we return the best connection we have, no matter if connection_quality_level is 2 or 3
conn=(PgSQL_Connection *)conns->remove_index_fast(conn_found_idx);
break;
default: // this should never happen
// LCOV_EXCL_START
assert(0);
break;
// LCOV_EXCL_STOP
}
} else {
conn=(PgSQL_Connection *)conns->remove_index_fast(i);
}
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PostgreSQL Connection %p, server %s:%d\n", conn, conn->parent->address, conn->parent->port);
return conn;
} else {
unsigned long long curtime = monotonic_time();
curtime = curtime / 1000 / 1000; // convert to second
PgSQL_HGC *_myhgc = mysrvc->myhgc;
if (curtime > _myhgc->current_time_now) {
_myhgc->current_time_now = curtime;
_myhgc->new_connections_now = 0;
}
_myhgc->new_connections_now++;
unsigned int throttle_connections_per_sec_to_hostgroup = (unsigned int) pgsql_thread___throttle_connections_per_sec_to_hostgroup;
if (_myhgc->attributes.configured == true) {
// pgsql_hostgroup_attributes takes priority
throttle_connections_per_sec_to_hostgroup = _myhgc->attributes.throttle_connections_per_sec;
}
if (_myhgc->new_connections_now > (unsigned int) throttle_connections_per_sec_to_hostgroup) {
__sync_fetch_and_add(&PgHGM->status.server_connections_delayed, 1);
return NULL;
} else {
conn = new PgSQL_Connection(false);
conn->parent=mysrvc;
// if attributes.multiplex == true , STATUS_PGSQL_CONNECTION_NO_MULTIPLEX_HG is set to false. And vice-versa
conn->set_status(!conn->parent->myhgc->attributes.multiplex, STATUS_PGSQL_CONNECTION_NO_MULTIPLEX_HG);
__sync_fetch_and_add(&PgHGM->status.server_connections_created, 1);
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning PostgreSQL Connection %p, server %s:%d\n", conn, conn->parent->address, conn->parent->port);
return conn;
}
}
return NULL; // never reach here
}
void PgSQL_HostGroups_Manager::unshun_server_all_hostgroups(const char * address, uint16_t port, time_t t, int max_wait_sec, unsigned int *skip_hid) {
// we scan all hostgroups looking for a specific server to unshun
// if skip_hid is not NULL , the specific hostgroup is skipped
if (GloPTH->variables.hostgroup_manager_verbose >= 3) {
char buf[64];
if (skip_hid == NULL) {
sprintf(buf,"NULL");
} else {
sprintf(buf,"%u", *skip_hid);
}
proxy_info("Calling unshun_server_all_hostgroups() for server %s:%d . Arguments: %lu , %d , %s\n" , address, port, t, max_wait_sec, buf);
}
int i, j;
for (i=0; i<(int)MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
if (skip_hid != NULL && myhgc->hid == *skip_hid) {
// if skip_hid is not NULL, we skip that specific hostgroup
continue;
}
bool found = false; // was this server already found in this hostgroup?
for (j=0; found==false && j<(int)myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->index(j);
if (mysrvc->status==MYSQL_SERVER_STATUS_SHUNNED) {
// we only care for SHUNNED nodes
// Note that we check for address and port only for status==MYSQL_SERVER_STATUS_SHUNNED ,
// that means that potentially we will pass by the matching node and still looping .
// This is potentially an optimization because we only check status and do not perform any strcmp()
if (strcmp(mysrvc->address,address)==0 && mysrvc->port==port) {
// we found the server in this hostgroup
// no need to process more servers in the same hostgroup
found = true;
if (t > mysrvc->time_last_detected_error && (t - mysrvc->time_last_detected_error) > max_wait_sec) {
if (
(mysrvc->shunned_and_kill_all_connections==false) // it is safe to bring it back online
||
(mysrvc->shunned_and_kill_all_connections==true && mysrvc->ConnectionsUsed->conns_length()==0 && mysrvc->ConnectionsFree->conns_length()==0) // if shunned_and_kill_all_connections is set, ensure all connections are already dropped
) {
if (GloPTH->variables.hostgroup_manager_verbose >= 3) {
proxy_info("Unshunning server %d:%s:%d . time_last_detected_error=%lu\n", mysrvc->myhgc->hid, address, port, mysrvc->time_last_detected_error);
}
mysrvc->status=MYSQL_SERVER_STATUS_ONLINE;
mysrvc->shunned_automatic=false;
mysrvc->shunned_and_kill_all_connections=false;
mysrvc->connect_ERR_at_time_last_detected_error=0;
mysrvc->time_last_detected_error=0;
}
}
}
}
}
}
}
PgSQL_Connection * PgSQL_HostGroups_Manager::get_MyConn_from_pool(unsigned int _hid, PgSQL_Session *sess, bool ff, char * gtid_uuid, uint64_t gtid_trxid, int max_lag_ms) {
PgSQL_Connection * conn=NULL;
wrlock();
status.pgconnpoll_get++;
PgSQL_HGC *myhgc=MyHGC_lookup(_hid);
PgSQL_SrvC *mysrvc = NULL;
#ifdef TEST_AURORA
for (int i=0; i<10; i++)
#endif // TEST_AURORA
mysrvc = myhgc->get_random_MySrvC(gtid_uuid, gtid_trxid, max_lag_ms, sess);
if (mysrvc) { // a PgSQL_SrvC exists. If not, we return NULL = no targets
conn=mysrvc->ConnectionsFree->get_random_MyConn(sess, ff);
if (conn) {
mysrvc->ConnectionsUsed->add(conn);
status.pgconnpoll_get_ok++;
mysrvc->update_max_connections_used();
}
}
wrunlock();
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning MySQL Connection %p, server %s:%d\n", conn, (conn ? conn->parent->address : "") , (conn ? conn->parent->port : 0 ));
return conn;
}
void PgSQL_HostGroups_Manager::destroy_MyConn_from_pool(PgSQL_Connection *c, bool _lock) {
bool to_del=true; // the default, legacy behavior
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)c->parent;
if (mysrvc->status==MYSQL_SERVER_STATUS_ONLINE && c->send_quit) {
if (c->async_state_machine!=ASYNC_IDLE) {
// the connection seems health, but we are trying to destroy it
// probably because there is a long running query
// therefore we will try to kill the connection
/* KILL BACKEND CONNECTION IS NOT IMPLEMENTED YET
if (pgsql_thread___kill_backend_connection_when_disconnect) {
int myerr = mysql_errno(c->pgsql);
switch (myerr) {
case 1231:
break;
default:
if (c->pgsql->thread_id) {
PgSQL_Connection_userinfo *ui=c->userinfo;
char *auth_password=NULL;
if (ui->password) {
if (ui->password[0]=='*') { // we don't have the real password, let's pass sha1
auth_password=ui->sha1_pass;
} else {
auth_password=ui->password;
}
}
KillArgs *ka = new KillArgs(ui->username, auth_password, c->parent->address, c->parent->port, c->parent->myhgc->hid, c->pgsql->thread_id, KILL_CONNECTION, c->parent->use_ssl, NULL, c->connected_host_details.ip);
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_attr_setstacksize (&attr, 256*1024);
pthread_t pt;
if (pthread_create(&pt, &attr, &kill_query_thread, ka) != 0) {
// LCOV_EXCL_START
proxy_error("Thread creation\n");
assert(0);
// LCOV_EXCL_STOP
}
}
break;
}
}*/
}
}
if (to_del) {
// we lock only this part of the code because we need to remove the connection from ConnectionsUsed
if (_lock) {
wrlock();
}
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying PgSQL_Connection %p, server %s:%d Error %s\n", c, mysrvc->address, mysrvc->port,
c->get_error_code_with_message().c_str());
mysrvc->ConnectionsUsed->remove(c);
status.pgconnpoll_destroy++;
if (_lock) {
wrunlock();
}
delete c;
}
}
inline double get_prometheus_counter_val(
std::map<std::string, prometheus::Counter*>& counter_map, const std::string& endpoint_id
) {
const auto& counter_entry = counter_map.find(endpoint_id);
double current_val = 0;
if (counter_entry != counter_map.end()) {
current_val = counter_entry->second->Value();
}
return current_val;
}
void reset_hg_attrs_server_defaults(PgSQL_SrvC* mysrvc) {
mysrvc->weight = -1;
mysrvc->max_connections = -1;
mysrvc->use_ssl = -1;
}
void update_hg_attrs_server_defaults(PgSQL_SrvC* mysrvc, PgSQL_HGC* myhgc) {
if (mysrvc->weight == -1) {
if (myhgc->servers_defaults.weight != -1) {
mysrvc->weight = myhgc->servers_defaults.weight;
} else {
// Same harcoded default as in 'CREATE TABLE pgsql_servers ...'
mysrvc->weight = 1;
}
}
if (mysrvc->max_connections == -1) {
if (myhgc->servers_defaults.max_connections != -1) {
mysrvc->max_connections = myhgc->servers_defaults.max_connections;
} else {
// Same harcoded default as in 'CREATE TABLE pgsql_servers ...'
mysrvc->max_connections = 1000;
}
}
if (mysrvc->use_ssl == -1) {
if (myhgc->servers_defaults.use_ssl != -1) {
mysrvc->use_ssl = myhgc->servers_defaults.use_ssl;
} else {
// Same harcoded default as in 'CREATE TABLE pgsql_servers ...'
mysrvc->use_ssl = 0;
}
}
}
void PgSQL_HostGroups_Manager::add(PgSQL_SrvC *mysrvc, unsigned int _hid) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Adding PgSQL_SrvC %p (%s:%d) for hostgroup %d\n", mysrvc, mysrvc->address, mysrvc->port, _hid);
// Since metrics for servers are stored per-endpoint; the metrics for a particular endpoint can live longer than the
// 'PgSQL_SrvC' itself. For example, a failover or a server config change could remove the server from a particular
// hostgroup, and a subsequent one bring it back to the original hostgroup. For this reason, everytime a 'mysrvc' is
// created and added to a particular hostgroup, we update the endpoint metrics for it.
std::string endpoint_id { std::to_string(_hid) + ":" + string { mysrvc->address } + ":" + std::to_string(mysrvc->port) };
mysrvc->bytes_recv = get_prometheus_counter_val(this->status.p_conn_pool_bytes_data_recv_map, endpoint_id);
mysrvc->bytes_sent = get_prometheus_counter_val(this->status.p_conn_pool_bytes_data_sent_map, endpoint_id);
mysrvc->connect_ERR = get_prometheus_counter_val(this->status.p_connection_pool_conn_err_map, endpoint_id);
mysrvc->connect_OK = get_prometheus_counter_val(this->status.p_connection_pool_conn_ok_map, endpoint_id);
mysrvc->queries_sent = get_prometheus_counter_val(this->status.p_connection_pool_queries_map, endpoint_id);
PgSQL_HGC *myhgc=MyHGC_lookup(_hid);
update_hg_attrs_server_defaults(mysrvc, myhgc);
myhgc->mysrvs->add(mysrvc);
}
void PgSQL_HostGroups_Manager::replication_lag_action_inner(PgSQL_HGC *myhgc, const char *address, unsigned int port, int current_replication_lag) {
int j;
for (j=0; j<(int)myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->index(j);
if (strcmp(mysrvc->address,address)==0 && mysrvc->port==port) {
if (mysrvc->status==MYSQL_SERVER_STATUS_ONLINE) {
if (
// (current_replication_lag==-1 )
// ||
(
current_replication_lag>=0 &&
mysrvc->max_replication_lag > 0 && // see issue #4018
((unsigned int)current_replication_lag > mysrvc->max_replication_lag)
)
) {
// always increase the counter
mysrvc->cur_replication_lag_count += 1;
if (mysrvc->cur_replication_lag_count >= (unsigned int)mysql_thread___monitor_replication_lag_count) {
proxy_warning("Shunning server %s:%d from HG %u with replication lag of %d second, count number: '%d'\n", address, port, myhgc->hid, current_replication_lag, mysrvc->cur_replication_lag_count);
mysrvc->status=MYSQL_SERVER_STATUS_SHUNNED_REPLICATION_LAG;
} else {
proxy_info(
"Not shunning server %s:%d from HG %u with replication lag of %d second, count number: '%d' < replication_lag_count: '%d'\n",
address,
port,
myhgc->hid,
current_replication_lag,
mysrvc->cur_replication_lag_count,
mysql_thread___monitor_replication_lag_count
);
}
} else {
mysrvc->cur_replication_lag_count = 0;
}
} else {
if (mysrvc->status==MYSQL_SERVER_STATUS_SHUNNED_REPLICATION_LAG) {
if (
(current_replication_lag>=0 && ((unsigned int)current_replication_lag <= mysrvc->max_replication_lag))
||
(current_replication_lag==-2) // see issue 959
) {
mysrvc->status=MYSQL_SERVER_STATUS_ONLINE;
proxy_warning("Re-enabling server %s:%d from HG %u with replication lag of %d second\n", address, port, myhgc->hid, current_replication_lag);
mysrvc->cur_replication_lag_count = 0;
}
}
}
return;
}
}
}
void PgSQL_HostGroups_Manager::replication_lag_action(const std::list<replication_lag_server_t>& pgsql_servers) {
//this method does not use admin table, so this lock is not needed.
//GloAdmin->mysql_servers_wrlock();
unsigned long long curtime1 = monotonic_time();
wrlock();
for (const auto& server : pgsql_servers) {
const int hid = std::get<PgSQL_REPLICATION_LAG_SERVER_T::PG_RLS_HOSTGROUP_ID>(server);
const std::string& address = std::get<PgSQL_REPLICATION_LAG_SERVER_T::PG_RLS_ADDRESS>(server);
const unsigned int port = std::get<PgSQL_REPLICATION_LAG_SERVER_T::PG_RLS_PORT>(server);
const int current_replication_lag = std::get<PgSQL_REPLICATION_LAG_SERVER_T::PG_RLS_CURRENT_REPLICATION_LAG>(server);
if (mysql_thread___monitor_replication_lag_group_by_host == false) {
// legacy check. 1 check per server per hostgroup
PgSQL_HGC *myhgc = MyHGC_find(hid);
replication_lag_action_inner(myhgc,address.c_str(),port,current_replication_lag);
}
else {
// only 1 check per server, no matter the hostgroup
// all hostgroups must be searched
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC*myhgc=(PgSQL_HGC*)MyHostGroups->index(i);
replication_lag_action_inner(myhgc,address.c_str(),port,current_replication_lag);
}
}
}
wrunlock();
//GloAdmin->mysql_servers_wrunlock();
unsigned long long curtime2 = monotonic_time();
curtime1 = curtime1 / 1000;
curtime2 = curtime2 / 1000;
proxy_debug(PROXY_DEBUG_MONITOR, 7, "PgSQL_HostGroups_Manager::replication_lag_action() locked for %llums (server count:%ld)\n", curtime2 - curtime1, pgsql_servers.size());
}
void PgSQL_HostGroups_Manager::drop_all_idle_connections() {
// NOTE: the caller should hold wrlock
int i, j;
for (i=0; i<(int)MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
for (j=0; j<(int)myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->index(j);
if (mysrvc->status!=MYSQL_SERVER_STATUS_ONLINE) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Server %s:%d is not online\n", mysrvc->address, mysrvc->port);
//__sync_fetch_and_sub(&status.server_connections_connected, mysrvc->ConnectionsFree->conns->len);
mysrvc->ConnectionsFree->drop_all_connections();
}
// Drop idle connections if beyond max_connection
while (mysrvc->ConnectionsFree->conns_length() && mysrvc->ConnectionsUsed->conns_length()+mysrvc->ConnectionsFree->conns_length() > mysrvc->max_connections) {
PgSQL_Connection *conn=mysrvc->ConnectionsFree->remove(0);
delete conn;
}
//PtrArray *pa=mysrvc->ConnectionsFree->conns;
PgSQL_SrvConnList *mscl=mysrvc->ConnectionsFree;
int free_connections_pct = pgsql_thread___free_connections_pct;
if (mysrvc->myhgc->attributes.configured == true) {
// pgsql_hostgroup_attributes takes priority
free_connections_pct = mysrvc->myhgc->attributes.free_connections_pct;
}
while (mscl->conns_length() > free_connections_pct*mysrvc->max_connections/100) {
PgSQL_Connection *mc=mscl->remove(0);
delete mc;
}
// drop all connections with life exceeding pgsql-connection_max_age
if (pgsql_thread___connection_max_age_ms) {
unsigned long long curtime=monotonic_time();
int i=0;
for (i=0; i<(int)mscl->conns_length() ; i++) {
PgSQL_Connection *mc=mscl->index(i);
unsigned long long intv = pgsql_thread___connection_max_age_ms;
intv *= 1000;
if (curtime > mc->creation_time + intv) {
mc=mscl->remove(0);
delete mc;
i--;
}
}
}
}
}
}
/*
* Prepares at most num_conn idle connections in the given hostgroup for
* pinging. When -1 is passed as a hostgroup, all hostgroups are examined.
*
* The resulting idle connections are returned in conn_list. Note that not all
* currently idle connections will be returned (some might be purged).
*
* Connections are purged according to 2 criteria:
* - whenever the maximal number of connections for a server is hit, free
* connections will be purged
* - also, idle connections that cause the number of free connections to rise
* above a certain percentage of the maximal number of connections will be
* dropped as well
*/
int PgSQL_HostGroups_Manager::get_multiple_idle_connections(int _hid, unsigned long long _max_last_time_used, PgSQL_Connection **conn_list, int num_conn) {
wrlock();
drop_all_idle_connections();
int num_conn_current=0;
int j,k;
PgSQL_HGC* myhgc = NULL;
// Multimap holding the required info for accesing the oldest idle connections found.
std::multimap<uint64_t,std::pair<PgSQL_SrvC*,int32_t>> oldest_idle_connections {};
for (int i=0; i<(int)MyHostGroups->len; i++) {
if (_hid == -1) {
// all hostgroups must be examined
// as of version 2.3.2 , this is always the case
myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
} else {
// only one hostgroup is examined
// as of version 2.3.2 , this never happen
// but the code support this functionality
myhgc = MyHGC_find(_hid);
i = (int)MyHostGroups->len; // to exit from this "for" loop
if (myhgc == NULL)
continue; // immediately exit
}
if (_hid >= 0 && _hid!=(int)myhgc->hid) continue;
for (j=0; j<(int)myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->index(j);
//PtrArray *pa=mysrvc->ConnectionsFree->conns;
PgSQL_SrvConnList *mscl=mysrvc->ConnectionsFree;
for (k=0; k<(int)mscl->conns_length(); k++) {
PgSQL_Connection *mc=mscl->index(k);
// If the connection is idle ...
if (mc->last_time_used && mc->last_time_used < _max_last_time_used) {
if ((int)oldest_idle_connections.size() < num_conn) {
oldest_idle_connections.insert({mc->last_time_used, { mysrvc, k }});
} else if (num_conn != 0) {
auto last_elem_it = std::prev(oldest_idle_connections.end());
if (mc->last_time_used < last_elem_it->first) {
oldest_idle_connections.erase(last_elem_it);
oldest_idle_connections.insert({mc->last_time_used, { mysrvc, k }});
}
}
}
}
}
}
// In order to extract the found connections, the following actions must be performed:
//
// 1. Filter the found connections by 'PgSQL_SrvC'.
// 2. Order by indexes on 'ConnectionsFree' in desc order.
// 3. Move the conns from 'ConnectionsFree' into 'ConnectionsUsed'.
std::unordered_map<PgSQL_SrvC*,vector<int>> mysrvcs_conns_idxs {};
// 1. Filter the connections by 'PgSQL_SrvC'.
//
// We extract this for being able to later iterate through the obtained 'PgSQL_SrvC' using the conn indexes.
for (const auto& conn_info : oldest_idle_connections) {
PgSQL_SrvC* mysrvc = conn_info.second.first;
int32_t mc_idx = conn_info.second.second;
auto mysrcv_it = mysrvcs_conns_idxs.find(mysrvc);
if (mysrcv_it == mysrvcs_conns_idxs.end()) {
mysrvcs_conns_idxs.insert({ mysrvc, { mc_idx }});
} else {
mysrcv_it->second.push_back(mc_idx);
}
}
// 2. Order by indexes on FreeConns in desc order.
//
// Since the conns are stored in 'ConnectionsFree', which holds the conns in a 'PtrArray', and we plan
// to remove multiple connections using the pre-stored indexes. We need to reorder the indexes in 'desc'
// order, otherwise we could be trashing the array while consuming it. See 'PtrArray::remove_index_fast'.
for (auto& mysrvc_conns_idxs : mysrvcs_conns_idxs) {
std::sort(std::begin(mysrvc_conns_idxs.second), std::end(mysrvc_conns_idxs.second), std::greater<int>());
}
// 3. Move the conns from 'ConnectionsFree' into 'ConnectionsUsed'.
for (auto& conn_info : mysrvcs_conns_idxs) {
PgSQL_SrvC* mysrvc = conn_info.first;
for (const int conn_idx : conn_info.second) {
PgSQL_SrvConnList* mscl = mysrvc->ConnectionsFree;
PgSQL_Connection* mc = mscl->remove(conn_idx);
mysrvc->ConnectionsUsed->add(mc);
conn_list[num_conn_current] = mc;
num_conn_current++;
// Left here as a safeguard
if (num_conn_current >= num_conn) {
goto __exit_get_multiple_idle_connections;
}
}
}
__exit_get_multiple_idle_connections:
status.pgconnpoll_get_ping+=num_conn_current;
wrunlock();
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Returning %d idle connections\n", num_conn_current);
return num_conn_current;
}
void PgSQL_HostGroups_Manager::save_incoming_pgsql_table(SQLite3_result *s, const string& name) {
SQLite3_result ** inc = NULL;
if (name == "pgsql_replication_hostgroups") {
inc = &incoming_replication_hostgroups;
} else if (name == "pgsql_hostgroup_attributes") {
inc = &incoming_hostgroup_attributes;
} else {
assert(0);
}
if (*inc != nullptr) {
delete *inc;
*inc = nullptr;
}
*inc = s;
}
void PgSQL_HostGroups_Manager::save_runtime_pgsql_servers(SQLite3_result *s) {
if (runtime_pgsql_servers) {
delete runtime_pgsql_servers;
runtime_pgsql_servers = nullptr;
}
runtime_pgsql_servers=s;
}
void PgSQL_HostGroups_Manager::save_pgsql_servers_v2(SQLite3_result* s) {
if (incoming_pgsql_servers_v2) {
delete incoming_pgsql_servers_v2;
incoming_pgsql_servers_v2 = nullptr;
}
incoming_pgsql_servers_v2 = s;
}
SQLite3_result* PgSQL_HostGroups_Manager::get_current_pgsql_table(const string& name) {
if (name == "pgsql_replication_hostgroups") {
return this->incoming_replication_hostgroups;
} else if (name == "pgsql_hostgroup_attributes") {
return this->incoming_hostgroup_attributes;
} else if (name == "cluster_pgsql_servers") {
return this->runtime_pgsql_servers;
} else if (name == "pgsql_servers_v2") {
return this->incoming_pgsql_servers_v2;
} else {
assert(0);
}
return NULL;
}
SQLite3_result * PgSQL_HostGroups_Manager::SQL3_Free_Connections() {
const int colnum=12;
proxy_debug(PROXY_DEBUG_MYSQL_CONNECTION, 4, "Dumping Free Connections in Pool\n");
SQLite3_result *result=new SQLite3_result(colnum);
result->add_column_definition(SQLITE_TEXT,"fd");
result->add_column_definition(SQLITE_TEXT,"hostgroup");
result->add_column_definition(SQLITE_TEXT,"srv_host");
result->add_column_definition(SQLITE_TEXT,"srv_port");
result->add_column_definition(SQLITE_TEXT,"user");
result->add_column_definition(SQLITE_TEXT,"dbname");
result->add_column_definition(SQLITE_TEXT,"init_connect");
result->add_column_definition(SQLITE_TEXT,"time_zone");
result->add_column_definition(SQLITE_TEXT,"sql_mode");
//result->add_column_definition(SQLITE_TEXT,"autocommit");
result->add_column_definition(SQLITE_TEXT,"idle_ms");
result->add_column_definition(SQLITE_TEXT,"statistics");
result->add_column_definition(SQLITE_TEXT,"pgsql_info");
unsigned long long curtime = monotonic_time();
wrlock();
int i,j, k, l;
for (i=0; i<(int)MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
for (j=0; j<(int)myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->index(j);
if (mysrvc->status!=MYSQL_SERVER_STATUS_ONLINE) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Server %s:%d is not online\n", mysrvc->address, mysrvc->port);
mysrvc->ConnectionsFree->drop_all_connections();
}
// drop idle connections if beyond max_connection
while (mysrvc->ConnectionsFree->conns_length() && mysrvc->ConnectionsUsed->conns_length()+mysrvc->ConnectionsFree->conns_length() > mysrvc->max_connections) {
//PgSQL_Connection *conn=(PgSQL_Connection *)mysrvc->ConnectionsFree->conns->remove_index_fast(0);
PgSQL_Connection *conn=mysrvc->ConnectionsFree->remove(0);
delete conn;
}
char buf[1024];
for (l=0; l < (int) mysrvc->ConnectionsFree->conns_length(); l++) {
char **pta=(char **)malloc(sizeof(char *)*colnum);
PgSQL_Connection *conn = mysrvc->ConnectionsFree->index(l);
sprintf(buf,"%d", conn->fd);
pta[0]=strdup(buf);
sprintf(buf,"%d", (int)myhgc->hid);
pta[1]=strdup(buf);
pta[2]=strdup(mysrvc->address);
sprintf(buf,"%d", mysrvc->port);
pta[3]=strdup(buf);
pta[4] = strdup(conn->userinfo->username);
pta[5] = strdup(conn->userinfo->dbname);
pta[6] = NULL;
if (conn->options.init_connect) {
pta[6] = strdup(conn->options.init_connect);
}
pta[7] = NULL;
/*if (conn->variables[SQL_TIME_ZONE].value) {
pta[7] = strdup(conn->variables[SQL_TIME_ZONE].value);
}*/
pta[8] = NULL;
/*if (conn->variables[SQL_SQL_MODE].value) {
pta[8] = strdup(conn->variables[SQL_SQL_MODE].value);
}*/
//sprintf(buf,"%d", conn->options.autocommit);
//pta[9]=strdup(buf);
sprintf(buf,"%llu", (curtime-conn->last_time_used)/1000);
pta[9]=strdup(buf);
{
json j;
char buff[32];
sprintf(buff,"%p",conn);
j["address"] = buff;
uint64_t age_ms = (curtime - conn->creation_time)/1000;
j["age_ms"] = age_ms;
j["bytes_recv"] = conn->bytes_info.bytes_recv;
j["bytes_sent"] = conn->bytes_info.bytes_sent;
j["pgconnpoll_get"] = conn->statuses.pgconnpoll_get;
j["pgconnpoll_put"] = conn->statuses.pgconnpoll_put;
j["questions"] = conn->statuses.questions;
const string s = j.dump();
pta[10] = strdup(s.c_str());
}
{
json j;
char buff[32];
sprintf(buff, "%p", conn->get_pg_connection());
j["address"] = buff;
j["host"] = conn->get_pg_host();
j["host_addr"] = conn->get_pg_hostaddr();
j["port"] = conn->get_pg_port();
j["user"] = conn->get_pg_user();
j["database"] = conn->get_pg_dbname();
j["backend_pid"] = conn->get_pg_backend_pid();
j["using_ssl"] = conn->get_pg_ssl_in_use() ? "YES" : "NO";
j["error_msg"] = conn->get_pg_error_message();
j["options"] = conn->get_pg_options();
j["fd"] = conn->get_pg_socket_fd();
j["protocol_version"] = conn->get_pg_protocol_version();
j["server_version"] = conn->get_pg_server_version_str(buff, sizeof(buff));
j["transaction_status"] = conn->get_pg_transaction_status_str();
j["connection_status"] = conn->get_pg_connection_status_str();
j["client_encoding"] = conn->get_pg_client_encoding();
j["is_nonblocking"] = conn->get_pg_is_nonblocking() ? "YES" : "NO";
const string s = j.dump();
pta[11] = strdup(s.c_str());
}
result->add_row(pta);
for (k=0; k<colnum; k++) {
if (pta[k])
free(pta[k]);
}
free(pta);
}
}
}
wrunlock();
return result;
}
void PgSQL_HostGroups_Manager::p_update_connection_pool_update_counter(
const std::string& endpoint_id, const std::map<std::string, std::string>& labels, std::map<std::string,
prometheus::Counter*>& m_map, unsigned long long value, PgSQL_p_hg_dyn_counter::metric idx
) {
const auto& counter_id = m_map.find(endpoint_id);
if (counter_id != m_map.end()) {
const auto& cur_val = counter_id->second->Value();
counter_id->second->Increment(value - cur_val);
} else {
auto& new_counter = status.p_dyn_counter_array[idx];
m_map.insert(
{
endpoint_id,
std::addressof(new_counter->Add(labels))
}
);
}
}
void PgSQL_HostGroups_Manager::p_update_connection_pool_update_gauge(
const std::string& endpoint_id, const std::map<std::string, std::string>& labels,
std::map<std::string, prometheus::Gauge*>& m_map, unsigned long long value, PgSQL_p_hg_dyn_gauge::metric idx
) {
const auto& counter_id = m_map.find(endpoint_id);
if (counter_id != m_map.end()) {
counter_id->second->Set(value);
} else {
auto& new_counter = status.p_dyn_gauge_array[idx];
m_map.insert(
{
endpoint_id,
std::addressof(new_counter->Add(labels))
}
);
}
}
void PgSQL_HostGroups_Manager::p_update_connection_pool() {
std::vector<string> cur_servers_ids {};
wrlock();
for (int i = 0; i < static_cast<int>(MyHostGroups->len); i++) {
PgSQL_HGC *myhgc = static_cast<PgSQL_HGC*>(MyHostGroups->index(i));
for (int j = 0; j < static_cast<int>(myhgc->mysrvs->cnt()); j++) {
PgSQL_SrvC *mysrvc = static_cast<PgSQL_SrvC*>(myhgc->mysrvs->servers->index(j));
std::string endpoint_addr = mysrvc->address;
std::string endpoint_port = std::to_string(mysrvc->port);
std::string hostgroup_id = std::to_string(myhgc->hid);
std::string endpoint_id = hostgroup_id + ":" + endpoint_addr + ":" + endpoint_port;
const std::map<std::string, std::string> common_labels {
{"endpoint", endpoint_addr + ":" + endpoint_port},
{"hostgroup", hostgroup_id }
};
cur_servers_ids.push_back(endpoint_id);
// proxysql_connection_pool_bytes_data_recv metric
std::map<std::string, std::string> recv_pool_bytes_labels = common_labels;
recv_pool_bytes_labels.insert({"traffic_flow", "recv"});
p_update_connection_pool_update_counter(endpoint_id, recv_pool_bytes_labels,
status.p_conn_pool_bytes_data_recv_map, mysrvc->bytes_recv, PgSQL_p_hg_dyn_counter::conn_pool_bytes_data_recv);
// proxysql_connection_pool_bytes_data_sent metric
std::map<std::string, std::string> sent_pool_bytes_labels = common_labels;
sent_pool_bytes_labels.insert({"traffic_flow", "sent"});
p_update_connection_pool_update_counter(endpoint_id, sent_pool_bytes_labels,
status.p_conn_pool_bytes_data_sent_map, mysrvc->bytes_sent, PgSQL_p_hg_dyn_counter::conn_pool_bytes_data_sent);
// proxysql_connection_pool_conn_err metric
std::map<std::string, std::string> pool_conn_err_labels = common_labels;
pool_conn_err_labels.insert({"status", "err"});
p_update_connection_pool_update_counter(endpoint_id, pool_conn_err_labels,
status.p_connection_pool_conn_err_map, mysrvc->connect_ERR, PgSQL_p_hg_dyn_counter::connection_pool_conn_err);
// proxysql_connection_pool_conn_ok metric
std::map<std::string, std::string> pool_conn_ok_labels = common_labels;
pool_conn_ok_labels.insert({"status", "ok"});
p_update_connection_pool_update_counter(endpoint_id, pool_conn_ok_labels,
status.p_connection_pool_conn_ok_map, mysrvc->connect_OK, PgSQL_p_hg_dyn_counter::connection_pool_conn_ok);
// proxysql_connection_pool_conn_free metric
std::map<std::string, std::string> pool_conn_free_labels = common_labels;
pool_conn_free_labels.insert({"status", "free"});
p_update_connection_pool_update_gauge(endpoint_id, pool_conn_free_labels,
status.p_connection_pool_conn_free_map, mysrvc->ConnectionsFree->conns_length(), PgSQL_p_hg_dyn_gauge::connection_pool_conn_free);
// proxysql_connection_pool_conn_used metric
std::map<std::string, std::string> pool_conn_used_labels = common_labels;
pool_conn_used_labels.insert({"status", "used"});
p_update_connection_pool_update_gauge(endpoint_id, pool_conn_used_labels,
status.p_connection_pool_conn_used_map, mysrvc->ConnectionsUsed->conns_length(), PgSQL_p_hg_dyn_gauge::connection_pool_conn_used);
// proxysql_connection_pool_latency_us metric
p_update_connection_pool_update_gauge(endpoint_id, common_labels,
status.p_connection_pool_latency_us_map, mysrvc->current_latency_us, PgSQL_p_hg_dyn_gauge::connection_pool_latency_us);
// proxysql_connection_pool_queries metric
p_update_connection_pool_update_counter(endpoint_id, common_labels,
status.p_connection_pool_queries_map, mysrvc->queries_sent, PgSQL_p_hg_dyn_counter::connection_pool_queries);
// proxysql_connection_pool_status metric
p_update_connection_pool_update_gauge(endpoint_id, common_labels,
status.p_connection_pool_status_map, mysrvc->status + 1, PgSQL_p_hg_dyn_gauge::connection_pool_status);
}
}
// Remove the non-present servers for the gauge metrics
vector<string> missing_server_keys {};
for (const auto& key : status.p_connection_pool_status_map) {
if (std::find(cur_servers_ids.begin(), cur_servers_ids.end(), key.first) == cur_servers_ids.end()) {
missing_server_keys.push_back(key.first);
}
}
for (const auto& key : missing_server_keys) {
auto gauge = status.p_connection_pool_status_map[key];
status.p_dyn_gauge_array[PgSQL_p_hg_dyn_gauge::connection_pool_status]->Remove(gauge);
status.p_connection_pool_status_map.erase(key);
gauge = status.p_connection_pool_conn_used_map[key];
status.p_dyn_gauge_array[PgSQL_p_hg_dyn_gauge::connection_pool_conn_free]->Remove(gauge);
status.p_connection_pool_conn_used_map.erase(key);
gauge = status.p_connection_pool_conn_free_map[key];
status.p_dyn_gauge_array[PgSQL_p_hg_dyn_gauge::connection_pool_conn_used]->Remove(gauge);
status.p_connection_pool_conn_free_map.erase(key);
gauge = status.p_connection_pool_latency_us_map[key];
status.p_dyn_gauge_array[PgSQL_p_hg_dyn_gauge::connection_pool_latency_us]->Remove(gauge);
status.p_connection_pool_latency_us_map.erase(key);
}
wrunlock();
}
SQLite3_result * PgSQL_HostGroups_Manager::SQL3_Connection_Pool(bool _reset, int *hid) {
const int colnum=13;
proxy_debug(PROXY_DEBUG_MYSQL_CONNECTION, 4, "Dumping Connection Pool\n");
SQLite3_result *result=new SQLite3_result(colnum);
result->add_column_definition(SQLITE_TEXT,"hostgroup");
result->add_column_definition(SQLITE_TEXT,"srv_host");
result->add_column_definition(SQLITE_TEXT,"srv_port");
result->add_column_definition(SQLITE_TEXT,"status");
result->add_column_definition(SQLITE_TEXT,"ConnUsed");
result->add_column_definition(SQLITE_TEXT,"ConnFree");
result->add_column_definition(SQLITE_TEXT,"ConnOK");
result->add_column_definition(SQLITE_TEXT,"ConnERR");
result->add_column_definition(SQLITE_TEXT,"MaxConnUsed");
result->add_column_definition(SQLITE_TEXT,"Queries");
result->add_column_definition(SQLITE_TEXT,"Bytes_sent");
result->add_column_definition(SQLITE_TEXT,"Bytes_recv");
result->add_column_definition(SQLITE_TEXT,"Latency_us");
wrlock();
int i,j, k;
for (i=0; i<(int)MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
for (j=0; j<(int)myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC *mysrvc=(PgSQL_SrvC *)myhgc->mysrvs->servers->index(j);
if (hid == NULL) {
if (mysrvc->status!=MYSQL_SERVER_STATUS_ONLINE) {
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Server %s:%d is not online\n", mysrvc->address, mysrvc->port);
//__sync_fetch_and_sub(&status.server_connections_connected, mysrvc->ConnectionsFree->conns->len);
mysrvc->ConnectionsFree->drop_all_connections();
}
// drop idle connections if beyond max_connection
while (mysrvc->ConnectionsFree->conns_length() && mysrvc->ConnectionsUsed->conns_length()+mysrvc->ConnectionsFree->conns_length() > mysrvc->max_connections) {
//PgSQL_Connection *conn=(PgSQL_Connection *)mysrvc->ConnectionsFree->conns->remove_index_fast(0);
PgSQL_Connection *conn=mysrvc->ConnectionsFree->remove(0);
delete conn;
//__sync_fetch_and_sub(&status.server_connections_connected, 1);
}
} else {
if (*hid != (int)myhgc->hid) {
continue;
}
}
char buf[1024];
char **pta=(char **)malloc(sizeof(char *)*colnum);
sprintf(buf,"%d", (int)myhgc->hid);
pta[0]=strdup(buf);
pta[1]=strdup(mysrvc->address);
sprintf(buf,"%d", mysrvc->port);
pta[2]=strdup(buf);
switch (mysrvc->status) {
case 0:
pta[3]=strdup("ONLINE");
break;
case 1:
pta[3]=strdup("SHUNNED");
break;
case 2:
pta[3]=strdup("OFFLINE_SOFT");
break;
case 3:
pta[3]=strdup("OFFLINE_HARD");
break;
case 4:
pta[3]=strdup("SHUNNED_REPLICATION_LAG");
break;
default:
// LCOV_EXCL_START
assert(0);
break;
// LCOV_EXCL_STOP
}
sprintf(buf,"%u", mysrvc->ConnectionsUsed->conns_length());
pta[4]=strdup(buf);
sprintf(buf,"%u", mysrvc->ConnectionsFree->conns_length());
pta[5]=strdup(buf);
sprintf(buf,"%u", mysrvc->connect_OK);
pta[6]=strdup(buf);
if (_reset) {
mysrvc->connect_OK=0;
}
sprintf(buf,"%u", mysrvc->connect_ERR);
pta[7]=strdup(buf);
if (_reset) {
mysrvc->connect_ERR=0;
}
sprintf(buf,"%u", mysrvc->max_connections_used);
pta[8]=strdup(buf);
if (_reset) {
mysrvc->max_connections_used=0;
}
sprintf(buf,"%llu", mysrvc->queries_sent);
pta[9]=strdup(buf);
if (_reset) {
mysrvc->queries_sent=0;
}
sprintf(buf,"%llu", mysrvc->bytes_sent);
pta[10]=strdup(buf);
if (_reset) {
mysrvc->bytes_sent=0;
}
sprintf(buf,"%llu", mysrvc->bytes_recv);
pta[11]=strdup(buf);
if (_reset) {
mysrvc->bytes_recv=0;
}
sprintf(buf,"%u", mysrvc->current_latency_us);
pta[12]=strdup(buf);
result->add_row(pta);
for (k=0; k<colnum; k++) {
if (pta[k])
free(pta[k]);
}
free(pta);
}
}
wrunlock();
return result;
}
#if 0 // DELETE AFTER 2025-07-14
void PgSQL_HostGroups_Manager::read_only_action(char *hostname, int port, int read_only) {
// define queries
const char *Q1B=(char *)"SELECT hostgroup_id,status FROM ( SELECT DISTINCT writer_hostgroup FROM pgsql_replication_hostgroups JOIN pgsql_servers WHERE (hostgroup_id=writer_hostgroup) AND hostname='%s' AND port=%d UNION SELECT DISTINCT writer_hostgroup FROM pgsql_replication_hostgroups JOIN pgsql_servers WHERE (hostgroup_id=reader_hostgroup) AND hostname='%s' AND port=%d) LEFT JOIN pgsql_servers ON hostgroup_id=writer_hostgroup AND hostname='%s' AND port=%d";
const char *Q2A=(char *)"DELETE FROM pgsql_servers WHERE hostname='%s' AND port=%d AND hostgroup_id IN (SELECT writer_hostgroup FROM pgsql_replication_hostgroups WHERE writer_hostgroup=pgsql_servers.hostgroup_id) AND status='OFFLINE_HARD'";
const char *Q2B=(char *)"UPDATE OR IGNORE pgsql_servers SET hostgroup_id=(SELECT writer_hostgroup FROM pgsql_replication_hostgroups WHERE reader_hostgroup=pgsql_servers.hostgroup_id) WHERE hostname='%s' AND port=%d AND hostgroup_id IN (SELECT reader_hostgroup FROM pgsql_replication_hostgroups WHERE reader_hostgroup=pgsql_servers.hostgroup_id)";
const char *Q3A=(char *)"INSERT OR IGNORE INTO pgsql_servers(hostgroup_id, hostname, port, status, weight, max_connections, max_replication_lag, use_ssl, max_latency_ms, comment) SELECT reader_hostgroup, hostname, port, status, weight, max_connections, max_replication_lag, use_ssl, max_latency_ms, pgsql_servers.comment FROM pgsql_servers JOIN pgsql_replication_hostgroups ON pgsql_servers.hostgroup_id=pgsql_replication_hostgroups.writer_hostgroup WHERE hostname='%s' AND port=%d";
const char *Q3B=(char *)"DELETE FROM pgsql_servers WHERE hostname='%s' AND port=%d AND hostgroup_id IN (SELECT reader_hostgroup FROM pgsql_replication_hostgroups WHERE reader_hostgroup=pgsql_servers.hostgroup_id)";
const char *Q4=(char *)"UPDATE OR IGNORE pgsql_servers SET hostgroup_id=(SELECT reader_hostgroup FROM pgsql_replication_hostgroups WHERE writer_hostgroup=pgsql_servers.hostgroup_id) WHERE hostname='%s' AND port=%d AND hostgroup_id IN (SELECT writer_hostgroup FROM pgsql_replication_hostgroups WHERE writer_hostgroup=pgsql_servers.hostgroup_id)";
const char *Q5=(char *)"DELETE FROM pgsql_servers WHERE hostname='%s' AND port=%d AND hostgroup_id IN (SELECT writer_hostgroup FROM pgsql_replication_hostgroups WHERE writer_hostgroup=pgsql_servers.hostgroup_id)";
if (GloAdmin==NULL) {
return;
}
// this prevents that multiple read_only_action() are executed at the same time
pthread_mutex_lock(&readonly_mutex);
// define a buffer that will be used for all queries
char *query=(char *)malloc(strlen(hostname)*2+strlen(Q3A)+256);
int cols=0;
char *error=NULL;
int affected_rows=0;
SQLite3_result *resultset=NULL;
int num_rows=0; // note: with the new implementation (2.1.1) , this becomes a sort of boolean, not an actual count
wrlock();
// we minimum the time we hold the mutex, as connection pool is being locked
if (read_only_set1.empty()) {
SQLite3_result *res_set1=NULL;
const char *q1 = (const char *)"SELECT DISTINCT hostname,port FROM pgsql_replication_hostgroups JOIN pgsql_servers ON hostgroup_id=writer_hostgroup AND status<>3";
mydb->execute_statement((char *)q1, &error , &cols , &affected_rows , &res_set1);
for (std::vector<SQLite3_row *>::iterator it = res_set1->rows.begin() ; it != res_set1->rows.end(); ++it) {
SQLite3_row *r=*it;
std::string s = r->fields[0];
s += ":::";
s += r->fields[1];
read_only_set1.insert(s);
}
proxy_info("Regenerating read_only_set1 with %lu servers\n", read_only_set1.size());
if (read_only_set1.empty()) {
// to avoid regenerating this set always with 0 entries, we generate a fake entry
read_only_set1.insert("----:::----");
}
delete res_set1;
}
wrunlock();
std::string ser = hostname;
ser += ":::";
ser += std::to_string(port);
std::set<std::string>::iterator it;
it = read_only_set1.find(ser);
if (it != read_only_set1.end()) {
num_rows=1;
}
if (admindb==NULL) { // we initialize admindb only if needed
admindb=new SQLite3DB();
admindb->open((char *)"file:mem_admindb?mode=memory&cache=shared", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX);
}
switch (read_only) {
case 0:
if (num_rows==0) {
// the server has read_only=0 , but we can't find any writer, so we perform a swap
GloAdmin->mysql_servers_wrlock();
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=0 phase 1 : Dumping pgsql_servers for %s:%d\n", hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
GloAdmin->save_proxysql_servers_runtime_to_database(false); // SAVE PgSQL SERVERS FROM RUNTIME
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=0 phase 2 : Dumping pgsql_servers for %s:%d\n", hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
sprintf(query,Q2A,hostname,port);
admindb->execute(query);
sprintf(query,Q2B,hostname,port);
admindb->execute(query);
if (mysql_thread___monitor_writer_is_also_reader) {
sprintf(query,Q3A,hostname,port);
} else {
sprintf(query,Q3B,hostname,port);
}
admindb->execute(query);
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=0 phase 3 : Dumping pgsql_servers for %s:%d\n", hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
GloAdmin->load_proxysql_servers_to_runtime(); // LOAD PgSQL SERVERS TO RUNTIME
GloAdmin->mysql_servers_wrunlock();
} else {
// there is a server in writer hostgroup, let check the status of present and not present hosts
bool act=false;
wrlock();
std::set<std::string>::iterator it;
// read_only_set2 acts as a cache
// if the server was RO=0 on the previous check and no action was needed,
// it will be here
it = read_only_set2.find(ser);
if (it != read_only_set2.end()) {
// the server was already detected as RO=0
// no action required
} else {
// it is the first time that we detect RO on this server
sprintf(query,Q1B,hostname,port,hostname,port,hostname,port);
mydb->execute_statement(query, &error , &cols , &affected_rows , &resultset);
for (std::vector<SQLite3_row *>::iterator it = resultset->rows.begin() ; it != resultset->rows.end(); ++it) {
SQLite3_row *r=*it;
int status=MYSQL_SERVER_STATUS_OFFLINE_HARD; // default status, even for missing
if (r->fields[1]) { // has status
status=atoi(r->fields[1]);
}
if (status==MYSQL_SERVER_STATUS_OFFLINE_HARD) {
act=true;
}
}
if (act == false) {
// no action required, therefore we write in read_only_set2
proxy_info("read_only_action() detected RO=0 on server %s:%d for the first time after commit(), but no need to reconfigure\n", hostname, port);
read_only_set2.insert(ser);
}
}
wrunlock();
if (act==true) { // there are servers either missing, or with stats=OFFLINE_HARD
GloAdmin->mysql_servers_wrlock();
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=0 , rows=%d , phase 1 : Dumping pgsql_servers for %s:%d\n", num_rows, hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
GloAdmin->save_proxysql_servers_runtime_to_database(false); // SAVE PgSQL SERVERS FROM RUNTIME
sprintf(query,Q2A,hostname,port);
admindb->execute(query);
sprintf(query,Q2B,hostname,port);
admindb->execute(query);
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=0 , rows=%d , phase 2 : Dumping pgsql_servers for %s:%d\n", num_rows, hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
if (mysql_thread___monitor_writer_is_also_reader) {
sprintf(query,Q3A,hostname,port);
} else {
sprintf(query,Q3B,hostname,port);
}
admindb->execute(query);
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=0 , rows=%d , phase 3 : Dumping pgsql_servers for %s:%d\n", num_rows, hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
GloAdmin->load_proxysql_servers_to_runtime(); // LOAD PgSQL SERVERS TO RUNTIME
GloAdmin->mysql_servers_wrunlock();
}
}
break;
case 1:
if (num_rows) {
// the server has read_only=1 , but we find it as writer, so we perform a swap
GloAdmin->mysql_servers_wrlock();
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=1 phase 1 : Dumping pgsql_servers for %s:%d\n", hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
GloAdmin->save_proxysql_servers_runtime_to_database(false); // SAVE PgSQL SERVERS FROM RUNTIME
sprintf(query,Q4,hostname,port);
admindb->execute(query);
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=1 phase 2 : Dumping pgsql_servers for %s:%d\n", hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
sprintf(query,Q5,hostname,port);
admindb->execute(query);
if (GloPTH->variables.hostgroup_manager_verbose) {
char *error2=NULL;
int cols2=0;
int affected_rows2=0;
SQLite3_result *resultset2=NULL;
char * query2 = NULL;
char *q = (char *)"SELECT * FROM pgsql_servers WHERE hostname=\"%s\" AND port=%d";
query2 = (char *)malloc(strlen(q)+strlen(hostname)+32);
sprintf(query2,q,hostname,port);
admindb->execute_statement(query2, &error2 , &cols2 , &affected_rows2 , &resultset2);
if (error2) {
proxy_error("Error on read from pgsql_servers : %s\n", error2);
} else {
if (resultset2) {
proxy_info("read_only_action RO=1 phase 3 : Dumping pgsql_servers for %s:%d\n", hostname, port);
resultset2->dump_to_stderr();
}
}
if (resultset2) { delete resultset2; resultset2=NULL; }
free(query2);
}
GloAdmin->load_proxysql_servers_to_runtime(); // LOAD PgSQL SERVERS TO RUNTIME
GloAdmin->mysql_servers_wrunlock();
}
break;
default:
// LCOV_EXCL_START
assert(0);
break;
// LCOV_EXCL_STOP
}
pthread_mutex_unlock(&readonly_mutex);
if (resultset) {
delete resultset;
}
free(query);
}
#endif // 0
/**
* @brief New implementation of the read_only_action method that does not depend on the admin table.
* The method checks each server in the provided list and adjusts the servers according to their corresponding read_only value.
* If any change has occured, checksum is calculated.
*
* @param pgsql_servers List of servers having hostname, port and read only value.
*
*/
void PgSQL_HostGroups_Manager::read_only_action_v2(
const std::list<read_only_server_t>& pgsql_servers, bool writer_is_also_reader
) {
bool update_pgsql_servers_table = false;
unsigned long long curtime1 = monotonic_time();
wrlock();
for (const auto& server : pgsql_servers) {
bool is_writer = false;
const std::string& hostname = std::get<PgSQL_READ_ONLY_SERVER_T::PG_ROS_HOSTNAME>(server);
const int port = std::get<PgSQL_READ_ONLY_SERVER_T::PG_ROS_PORT>(server);
const int read_only = std::get<PgSQL_READ_ONLY_SERVER_T::PG_ROS_READONLY>(server);
const std::string& srv_id = hostname + ":::" + std::to_string(port);
auto itr = hostgroup_server_mapping.find(srv_id);
if (itr == hostgroup_server_mapping.end()) {
proxy_warning("Server %s:%d not found\n", hostname.c_str(), port);
continue;
}
HostGroup_Server_Mapping* host_server_mapping = itr->second.get();
if (!host_server_mapping)
assert(0);
const std::vector<HostGroup_Server_Mapping::Node>& writer_map = host_server_mapping->get(HostGroup_Server_Mapping::Type::WRITER);
is_writer = !writer_map.empty();
if (read_only == 0) {
if (is_writer == false) {
// the server has read_only=0 (writer), but we can't find any writer,
// so we copy all reader nodes to writer
proxy_info("Server '%s:%d' found with 'read_only=0', but not found as writer\n", hostname.c_str(), port);
proxy_debug(PROXY_DEBUG_MONITOR, 5, "Server '%s:%d' found with 'read_only=0', but not found as writer\n", hostname.c_str(), port);
host_server_mapping->copy_if_not_exists(HostGroup_Server_Mapping::Type::WRITER, HostGroup_Server_Mapping::Type::READER);
if (writer_is_also_reader == false) {
// remove node from reader
host_server_mapping->clear(HostGroup_Server_Mapping::Type::READER);
}
update_pgsql_servers_table = true;
proxy_info("Regenerating table 'pgsql_servers' due to actions on server '%s:%d'\n", hostname.c_str(), port);
} else {
bool act = false;
// if the server was RO=0 on the previous check then no action is needed
if (host_server_mapping->get_readonly_flag() != 0) {
// it is the first time that we detect RO on this server
const std::vector<HostGroup_Server_Mapping::Node>& reader_map = host_server_mapping->get(HostGroup_Server_Mapping::Type::READER);
for (const auto& reader_node : reader_map) {
for (const auto& writer_node : writer_map) {
if (reader_node.writer_hostgroup_id == writer_node.writer_hostgroup_id) {
goto __writer_found;
}
}
act = true;
break;
__writer_found:
continue;
}
if (act == false) {
// no action required, therefore we set readonly_flag to 0
proxy_info("read_only_action_v2() detected RO=0 on server %s:%d for the first time after commit(), but no need to reconfigure\n", hostname.c_str(), port);
host_server_mapping->set_readonly_flag(0);
}
} else {
// the server was already detected as RO=0
// no action required
}
if (act == true) { // there are servers either missing, or with stats=OFFLINE_HARD
proxy_info("Server '%s:%d' with 'read_only=0' found missing at some 'writer_hostgroup'\n", hostname.c_str(), port);
proxy_debug(PROXY_DEBUG_MONITOR, 5, "Server '%s:%d' with 'read_only=0' found missing at some 'writer_hostgroup'\n", hostname.c_str(), port);
// copy all reader nodes to writer
host_server_mapping->copy_if_not_exists(HostGroup_Server_Mapping::Type::WRITER, HostGroup_Server_Mapping::Type::READER);
if (writer_is_also_reader == false) {
// remove node from reader
host_server_mapping->clear(HostGroup_Server_Mapping::Type::READER);
}
update_pgsql_servers_table = true;
proxy_info("Regenerating table 'pgsql_servers' due to actions on server '%s:%d'\n", hostname.c_str(), port);
}
}
} else if (read_only == 1) {
if (is_writer) {
// the server has read_only=1 (reader), but we find it as writer, so we copy all writer nodes to reader (previous reader nodes will be reused)
proxy_info("Server '%s:%d' found with 'read_only=1', but not found as reader\n", hostname.c_str(), port);
proxy_debug(PROXY_DEBUG_MONITOR, 5, "Server '%s:%d' found with 'read_only=1', but not found as reader\n", hostname.c_str(), port);
host_server_mapping->copy_if_not_exists(HostGroup_Server_Mapping::Type::READER, HostGroup_Server_Mapping::Type::WRITER);
// clearing all writer nodes
host_server_mapping->clear(HostGroup_Server_Mapping::Type::WRITER);
update_pgsql_servers_table = true;
proxy_info("Regenerating table 'pgsql_servers' due to actions on server '%s:%d'\n", hostname.c_str(), port);
}
} else {
// LCOV_EXCL_START
assert(0);
break;
// LCOV_EXCL_STOP
}
}
if (update_pgsql_servers_table) {
purge_pgsql_servers_table();
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 4, "DELETE FROM pgsql_servers\n");
mydb->execute("DELETE FROM pgsql_servers");
generate_pgsql_servers_table();
// Update the global checksums after 'pgsql_servers' regeneration
{
unique_ptr<SQLite3_result> resultset { get_admin_runtime_pgsql_servers(mydb) };
uint64_t raw_checksum = resultset ? resultset->raw_checksum() : 0;
// This is required to be updated to avoid extra rebuilding member 'hostgroup_server_mapping'
// during 'commit'. For extra details see 'hgsm_pgsql_servers_checksum' @details.
hgsm_pgsql_servers_checksum = raw_checksum;
string mysrvs_checksum { get_checksum_from_hash(raw_checksum) };
save_runtime_pgsql_servers(resultset.release());
proxy_info("Checksum for table %s is %s\n", "pgsql_servers", mysrvs_checksum.c_str());
pthread_mutex_lock(&GloVars.checksum_mutex);
update_glovars_pgsql_servers_checksum(mysrvs_checksum);
pthread_mutex_unlock(&GloVars.checksum_mutex);
}
}
wrunlock();
unsigned long long curtime2 = monotonic_time();
curtime1 = curtime1 / 1000;
curtime2 = curtime2 / 1000;
proxy_debug(PROXY_DEBUG_MONITOR, 7, "PgSQL_HostGroups_Manager::read_only_action_v2() locked for %llums (server count:%ld)\n", curtime2 - curtime1, pgsql_servers.size());
}
// shun_and_killall
// this function is called only from MySQL_Monitor::monitor_ping()
// it temporary disables a host that is not responding to pings, and mark the host in a way that when used the connection will be dropped
// return true if the status was changed
bool PgSQL_HostGroups_Manager::shun_and_killall(char *hostname, int port) {
time_t t = time(NULL);
bool ret = false;
wrlock();
PgSQL_SrvC *mysrvc=NULL;
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
unsigned int j;
unsigned int l=myhgc->mysrvs->cnt();
if (l) {
for (j=0; j<l; j++) {
mysrvc=myhgc->mysrvs->idx(j);
if (mysrvc->port==port && strcmp(mysrvc->address,hostname)==0) {
switch (mysrvc->status) {
case MYSQL_SERVER_STATUS_SHUNNED:
if (mysrvc->shunned_automatic==false) {
break;
}
case MYSQL_SERVER_STATUS_ONLINE:
if (mysrvc->status == MYSQL_SERVER_STATUS_ONLINE) {
ret = true;
}
mysrvc->status=MYSQL_SERVER_STATUS_SHUNNED;
case MYSQL_SERVER_STATUS_OFFLINE_SOFT:
mysrvc->shunned_automatic=true;
mysrvc->shunned_and_kill_all_connections=true;
mysrvc->ConnectionsFree->drop_all_connections();
break;
default:
break;
}
// if Monitor is enabled and pgsql-monitor_ping_interval is
// set too high, ProxySQL will unshun hosts that are not
// available. For this reason time_last_detected_error will
// be tuned in the future
if (mysql_thread___monitor_enabled) {
int a = pgsql_thread___shun_recovery_time_sec;
int b = mysql_thread___monitor_ping_interval;
b = b/1000;
if (b > a) {
t = t + (b - a);
}
}
mysrvc->time_last_detected_error = t;
}
}
}
}
wrunlock();
return ret;
}
// set_server_current_latency_us
// this function is called only from MySQL_Monitor::monitor_ping()
// it set the average latency for a host in the last 3 pings
// the connection pool will use this information to evaluate or exclude a specific hosts
// note that this variable is in microsecond, while user defines it in millisecond
void PgSQL_HostGroups_Manager::set_server_current_latency_us(char *hostname, int port, unsigned int _current_latency_us) {
wrlock();
PgSQL_SrvC *mysrvc=NULL;
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
unsigned int j;
unsigned int l=myhgc->mysrvs->cnt();
if (l) {
for (j=0; j<l; j++) {
mysrvc=myhgc->mysrvs->idx(j);
if (mysrvc->port==port && strcmp(mysrvc->address,hostname)==0) {
mysrvc->current_latency_us=_current_latency_us;
}
}
}
}
wrunlock();
}
void PgSQL_HostGroups_Manager::p_update_metrics() {
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::servers_table_version], status.servers_table_version);
// Update *server_connections* related metrics
status.p_gauge_array[PgSQL_p_hg_gauge::server_connections_connected]->Set(status.server_connections_connected);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::server_connections_aborted], status.server_connections_aborted);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::server_connections_created], status.server_connections_created);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::server_connections_delayed], status.server_connections_delayed);
// Update *client_connections* related metrics
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::client_connections_created], status.client_connections_created);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::client_connections_aborted], status.client_connections_aborted);
status.p_gauge_array[PgSQL_p_hg_gauge::client_connections_connected]->Set(status.client_connections);
// Update *acess_denied* related metrics
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::access_denied_wrong_password], status.access_denied_wrong_password);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::access_denied_max_connections], status.access_denied_max_connections);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::access_denied_max_user_connections], status.access_denied_max_user_connections);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::selects_for_update__autocommit0], status.select_for_update_or_equivalent);
// Update *com_* related metrics
//p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_autocommit], status.autocommit_cnt);
//p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_autocommit_filtered], status.autocommit_cnt_filtered);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_commit_cnt], status.commit_cnt);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_commit_cnt_filtered], status.commit_cnt_filtered);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_rollback], status.rollback_cnt);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_rollback_filtered], status.rollback_cnt_filtered);
//p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_backend_init_db], status.backend_init_db);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_backend_reset_connection], status.backend_reset_connection);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_backend_set_client_encoding], status.backend_set_client_encoding);
//p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_frontend_init_db], status.frontend_init_db);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_frontend_set_client_encoding], status.frontend_set_client_encoding);
//p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::com_frontend_use_db], status.frontend_use_db);
// Update *myconnpoll* related metrics
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::pghgm_pgconnpool_get], status.pgconnpoll_get);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::pghgm_pgconnpool_get_ok], status.pgconnpoll_get_ok);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::pghgm_pgconnpool_get_ping], status.pgconnpoll_get_ping);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::pghgm_pgconnpool_push], status.pgconnpoll_push);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::pghgm_pgconnpool_reset], status.pgconnpoll_reset);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::pghgm_pgconnpool_destroy], status.pgconnpoll_destroy);
p_update_counter(status.p_counter_array[PgSQL_p_hg_counter::auto_increment_delay_multiplex], status.auto_increment_delay_multiplex);
// Update the *connection_pool* metrics
this->p_update_connection_pool();
}
SQLite3_result * PgSQL_HostGroups_Manager::SQL3_Get_ConnPool_Stats() {
const int colnum=2;
char buf[256];
char **pta=(char **)malloc(sizeof(char *)*colnum);
proxy_debug(PROXY_DEBUG_MYSQL_CONNECTION, 4, "Dumping PgSQL Global Status\n");
SQLite3_result *result=new SQLite3_result(colnum);
result->add_column_definition(SQLITE_TEXT,"Variable_Name");
result->add_column_definition(SQLITE_TEXT,"Variable_Value");
wrlock();
// NOTE: as there is no string copy, we do NOT free pta[0] and pta[1]
{
pta[0]=(char *)"PgHGM_pgconnpoll_get";
sprintf(buf,"%lu",status.pgconnpoll_get);
pta[1]=buf;
result->add_row(pta);
}
{
pta[0]=(char *)"PgHGM_pgconnpoll_get_ok";
sprintf(buf,"%lu",status.pgconnpoll_get_ok);
pta[1]=buf;
result->add_row(pta);
}
{
pta[0]=(char *)"PgHGM_pgconnpoll_push";
sprintf(buf,"%lu",status.pgconnpoll_push);
pta[1]=buf;
result->add_row(pta);
}
{
pta[0]=(char *)"PgHGM_pgconnpoll_destroy";
sprintf(buf,"%lu",status.pgconnpoll_destroy);
pta[1]=buf;
result->add_row(pta);
}
{
pta[0]=(char *)"PgHGM_pgconnpoll_reset";
sprintf(buf,"%lu",status.pgconnpoll_reset);
pta[1]=buf;
result->add_row(pta);
}
wrunlock();
free(pta);
return result;
}
unsigned long long PgSQL_HostGroups_Manager::Get_Memory_Stats() {
unsigned long long intsize=0;
wrlock();
PgSQL_SrvC *mysrvc=NULL;
for (unsigned int i=0; i<MyHostGroups->len; i++) {
intsize+=sizeof(PgSQL_HGC);
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
unsigned int j,k;
unsigned int l=myhgc->mysrvs->cnt();
if (l) {
for (j=0; j<l; j++) {
intsize+=sizeof(PgSQL_SrvC);
mysrvc=myhgc->mysrvs->idx(j);
intsize+=((mysrvc->ConnectionsUsed->conns_length())*sizeof(PgSQL_Connection *));
for (k=0; k<mysrvc->ConnectionsFree->conns_length(); k++) {
//PgSQL_Connection *myconn=(PgSQL_Connection *)mysrvc->ConnectionsFree->conns->index(k);
PgSQL_Connection *myconn=mysrvc->ConnectionsFree->index(k);
intsize+= sizeof(PgSQL_Connection);
intsize+=myconn->get_memory_usage();
//intsize+=(4096*15); // ASYNC_CONTEXT_DEFAULT_STACK_SIZE
if (myconn->query_result) {
intsize+=myconn->query_result->current_size();
}
}
intsize+=((mysrvc->ConnectionsUsed->conns_length())*sizeof(PgSQL_Connection *));
}
}
}
wrunlock();
return intsize;
}
void PgSQL_HostGroups_Manager::add_pgsql_errors(int hostgroup, const char *hostname, int port, const char *username, const char *address,
const char *dbname, const char* sqlstate, const char *errmsg) {
SpookyHash myhash;
uint64_t hash1;
uint64_t hash2;
size_t rand_del_len=strlen(rand_del);
time_t tn = time(NULL);
myhash.Init(11,4);
myhash.Update(&hostgroup,sizeof(hostgroup));
myhash.Update(rand_del,rand_del_len);
if (hostname) {
myhash.Update(hostname,strlen(hostname));
}
myhash.Update(rand_del,rand_del_len);
myhash.Update(&port,sizeof(port));
if (username) {
myhash.Update(username,strlen(username));
}
myhash.Update(rand_del,rand_del_len);
if (address) {
myhash.Update(address,strlen(address));
}
myhash.Update(rand_del,rand_del_len);
if (dbname) {
myhash.Update(dbname,strlen(dbname));
}
myhash.Update(rand_del,rand_del_len);
if (sqlstate) {
myhash.Update(sqlstate, strlen(sqlstate));
}
myhash.Final(&hash1,&hash2);
pthread_mutex_lock(&pgsql_errors_mutex);
if (auto it = pgsql_errors_umap.find(hash1); it != pgsql_errors_umap.end()) {
// found
auto& err_stats = it->second;
err_stats->add_time(tn, errmsg);
} else {
PgSQL_Errors_stats* err_stats = new PgSQL_Errors_stats(hostgroup, hostname, port, username, address, dbname, sqlstate, errmsg, tn);
pgsql_errors_umap.insert(std::make_pair(hash1, err_stats));
}
pthread_mutex_unlock(&pgsql_errors_mutex);
}
std::unique_ptr<SQLite3_result> PgSQL_HostGroups_Manager::get_pgsql_errors(bool reset) {
std::unique_ptr<SQLite3_result> result = std::make_unique<SQLite3_result>(PgSQL_ERRORS_STATS_FIELD_NUM);
result->add_column_definition(SQLITE_TEXT,"hid");
result->add_column_definition(SQLITE_TEXT,"hostname");
result->add_column_definition(SQLITE_TEXT,"port");
result->add_column_definition(SQLITE_TEXT,"username");
result->add_column_definition(SQLITE_TEXT,"client_address");
result->add_column_definition(SQLITE_TEXT,"database");
result->add_column_definition(SQLITE_TEXT,"sqlstate");
result->add_column_definition(SQLITE_TEXT,"count_star");
result->add_column_definition(SQLITE_TEXT,"first_seen");
result->add_column_definition(SQLITE_TEXT,"last_seen");
result->add_column_definition(SQLITE_TEXT,"last_error");
pthread_mutex_lock(&pgsql_errors_mutex);
for (auto it=pgsql_errors_umap.begin(); it!=pgsql_errors_umap.end(); ++it) {
auto& err_stats = it->second;
char **pta= err_stats->get_row();
result->add_row(pta);
err_stats->free_row(pta);
if (reset) {
err_stats.reset();
}
}
if (reset) {
pgsql_errors_umap.clear();
}
pthread_mutex_unlock(&pgsql_errors_mutex);
return result;
}
/**
* @brief Initializes the supplied 'PgSQL_HGC' with the specified 'hostgroup_settings'.
* @details Input verification is performed in the supplied 'hostgroup_settings'. It's expected to be a valid
* JSON that may contain the following fields:
* - handle_warnings: Value must be >= 0.
*
* In case input verification fails for a field, supplied 'PgSQL_HGC' is NOT updated for that field. An error
* message is logged specifying the source of the error.
*
* @param hostgroup_settings String containing a JSON defined in 'pgsql_hostgroup_attributes'.
* @param myhgc The 'PgSQL_HGC' of the target hostgroup of the supplied 'hostgroup_settings'.
*/
void init_myhgc_hostgroup_settings(const char* hostgroup_settings, PgSQL_HGC* myhgc) {
const uint32_t hid = myhgc->hid;
if (hostgroup_settings[0] != '\0') {
try {
nlohmann::json j = nlohmann::json::parse(hostgroup_settings);
const auto handle_warnings_check = [](int8_t handle_warnings) -> bool { return handle_warnings == 0 || handle_warnings == 1; };
int8_t handle_warnings = PgSQL_j_get_srv_default_int_val<int8_t>(j, hid, "handle_warnings", handle_warnings_check);
myhgc->attributes.handle_warnings = handle_warnings;
}
catch (const json::exception& e) {
proxy_error(
"JSON parsing for 'pgsql_hostgroup_attributes.hostgroup_settings' for hostgroup %d failed with exception `%s`.\n",
hid, e.what()
);
}
}
}
/**
* @brief Initializes the supplied 'PgSQL_HGC' with the specified 'servers_defaults'.
* @details Input verification is performed in the supplied 'server_defaults'. It's expected to be a valid
* JSON that may contain the following fields:
* - weight: Must be an unsigned integer >= 0.
* - max_connections: Must be an unsigned integer >= 0.
* - use_ssl: Must be a integer with either value 0 or 1.
*
* In case input verification fails for a field, supplied 'PgSQL_HGC' is NOT updated for that field. An error
* message is logged specifying the source of the error.
*
* @param servers_defaults String containing a JSON defined in 'pgsql_hostgroup_attributes'.
* @param myhgc The 'PgSQL_HGC' of the target hostgroup of the supplied 'servers_defaults'.
*/
void init_myhgc_servers_defaults(char* servers_defaults, PgSQL_HGC* myhgc) {
uint32_t hid = myhgc->hid;
if (strcmp(servers_defaults, "") != 0) {
try {
nlohmann::json j = nlohmann::json::parse(servers_defaults);
const auto weight_check = [] (int64_t weight) -> bool { return weight >= 0; };
int64_t weight = PgSQL_j_get_srv_default_int_val<int64_t>(j, hid, "weight", weight_check);
myhgc->servers_defaults.weight = weight;
const auto max_conns_check = [] (int64_t max_conns) -> bool { return max_conns >= 0; };
int64_t max_conns = PgSQL_j_get_srv_default_int_val<int64_t>(j, hid, "max_connections", max_conns_check);
myhgc->servers_defaults.max_connections = max_conns;
const auto use_ssl_check = [] (int32_t use_ssl) -> bool { return use_ssl == 0 || use_ssl == 1; };
int32_t use_ssl = PgSQL_j_get_srv_default_int_val<int32_t>(j, hid, "use_ssl", use_ssl_check);
myhgc->servers_defaults.use_ssl = use_ssl;
} catch (const json::exception& e) {
proxy_error(
"JSON parsing for 'pgsql_hostgroup_attributes.servers_defaults' for hostgroup %d failed with exception `%s`.\n",
hid, e.what()
);
}
}
}
void PgSQL_HostGroups_Manager::generate_pgsql_hostgroup_attributes_table() {
if (incoming_hostgroup_attributes==NULL) {
return;
}
int rc;
sqlite3_stmt *statement=NULL;
const char * query=(const char *)"INSERT INTO pgsql_hostgroup_attributes ( "
"hostgroup_id, max_num_online_servers, autocommit, free_connections_pct, "
"init_connect, multiplex, connection_warming, throttle_connections_per_sec, "
"ignore_session_variables, hostgroup_settings, servers_defaults, comment) VALUES "
"(?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12)";
//rc=(*proxy_sqlite3_prepare_v2)(mydb3, query, -1, &statement, 0);
rc = mydb->prepare_v2(query, &statement);
ASSERT_SQLITE_OK(rc, mydb);
proxy_info("New pgsql_hostgroup_attributes table\n");
bool current_configured[MyHostGroups->len];
// set configured = false to all
// in this way later we can known which HG were updated
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
current_configured[i] = myhgc->attributes.configured;
myhgc->attributes.configured = false;
}
/**
* @brief We iterate the whole resultset incoming_hostgroup_attributes and configure
* both the hostgroup in memory, but also pupulate table pgsql_hostgroup_attributes
* connection errors.
* @details for each row in incoming_hostgroup_attributes:
* 1. it finds (or create) the hostgroup
* 2. it writes the in pgsql_hostgroup_attributes
* 3. it finds (or create) the attributes of the hostgroup
*/
for (std::vector<SQLite3_row *>::iterator it = incoming_hostgroup_attributes->rows.begin() ; it != incoming_hostgroup_attributes->rows.end(); ++it) {
SQLite3_row *r=*it;
unsigned int hid = (unsigned int)atoi(r->fields[0]);
PgSQL_HGC *myhgc = MyHGC_lookup(hid); // note: MyHGC_lookup() will create the HG if doesn't exist!
int max_num_online_servers = atoi(r->fields[1]);
int autocommit = atoi(r->fields[2]);
int free_connections_pct = atoi(r->fields[3]);
char * init_connect = r->fields[4];
int multiplex = atoi(r->fields[5]);
int connection_warming = atoi(r->fields[6]);
int throttle_connections_per_sec = atoi(r->fields[7]);
char * ignore_session_variables = r->fields[8];
char * hostgroup_settings = r->fields[9];
char * servers_defaults = r->fields[10];
char * comment = r->fields[11];
proxy_info("Loading MySQL Hostgroup Attributes info for (%d,%d,%d,%d,\"%s\",%d,%d,%d,\"%s\",\"%s\",\"%s\",\"%s\")\n",
hid, max_num_online_servers, autocommit, free_connections_pct,
init_connect, multiplex, connection_warming, throttle_connections_per_sec,
ignore_session_variables, hostgroup_settings, servers_defaults, comment
);
rc=(*proxy_sqlite3_bind_int64)(statement, 1, hid); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement, 2, max_num_online_servers); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement, 3, autocommit); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement, 4, free_connections_pct); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement, 5, init_connect, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement, 6, multiplex); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement, 7, connection_warming); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_int64)(statement, 8, throttle_connections_per_sec); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement, 9, ignore_session_variables, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement, 10, hostgroup_settings, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement, 11, servers_defaults, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_bind_text)(statement, 12, comment, -1, SQLITE_TRANSIENT); ASSERT_SQLITE_OK(rc, mydb);
SAFE_SQLITE3_STEP2(statement);
rc=(*proxy_sqlite3_clear_bindings)(statement); ASSERT_SQLITE_OK(rc, mydb);
rc=(*proxy_sqlite3_reset)(statement); ASSERT_SQLITE_OK(rc, mydb);
myhgc->attributes.configured = true;
myhgc->attributes.max_num_online_servers = max_num_online_servers;
myhgc->attributes.autocommit = autocommit;
myhgc->attributes.free_connections_pct = free_connections_pct;
myhgc->attributes.multiplex = multiplex;
myhgc->attributes.connection_warming = connection_warming;
myhgc->attributes.throttle_connections_per_sec = throttle_connections_per_sec;
if (myhgc->attributes.init_connect != NULL)
free(myhgc->attributes.init_connect);
myhgc->attributes.init_connect = strdup(init_connect);
if (myhgc->attributes.comment != NULL)
free(myhgc->attributes.comment);
myhgc->attributes.comment = strdup(comment);
// for ignore_session_variables we store 2 versions:
// 1. the text
// 2. the JSON
// Because calling JSON functions is expensive, we first verify if it changes
if (myhgc->attributes.ignore_session_variables_text == NULL) {
myhgc->attributes.ignore_session_variables_text = strdup(ignore_session_variables);
if (strlen(ignore_session_variables) != 0) { // only if there is a valid JSON
if (myhgc->attributes.ignore_session_variables_json != nullptr) { delete myhgc->attributes.ignore_session_variables_json; }
myhgc->attributes.ignore_session_variables_json = new json(json::parse(ignore_session_variables));
}
} else {
if (strcmp(myhgc->attributes.ignore_session_variables_text, ignore_session_variables) != 0) {
free(myhgc->attributes.ignore_session_variables_text);
myhgc->attributes.ignore_session_variables_text = strdup(ignore_session_variables);
if (strlen(ignore_session_variables) != 0) { // only if there is a valid JSON
if (myhgc->attributes.ignore_session_variables_json != nullptr) { delete myhgc->attributes.ignore_session_variables_json; }
myhgc->attributes.ignore_session_variables_json = new json(json::parse(ignore_session_variables));
}
// TODO: assign the variables
}
}
init_myhgc_hostgroup_settings(hostgroup_settings, myhgc);
init_myhgc_servers_defaults(servers_defaults, myhgc);
}
for (unsigned int i=0; i<MyHostGroups->len; i++) {
PgSQL_HGC *myhgc=(PgSQL_HGC *)MyHostGroups->index(i);
if (myhgc->attributes.configured == false) {
if (current_configured[i] == true) {
// if configured == false and previously it was configured == true , reset to defaults
proxy_info("Resetting hostgroup attributes for hostgroup %u\n", myhgc->hid);
myhgc->reset_attributes();
}
}
}
delete incoming_hostgroup_attributes;
incoming_hostgroup_attributes=NULL;
}
int PgSQL_HostGroups_Manager::create_new_server_in_hg(
uint32_t hid, const PgSQL_srv_info_t& srv_info, const PgSQL_srv_opts_t& srv_opts
) {
int32_t res = -1;
PgSQL_SrvC* mysrvc = find_server_in_hg(hid, srv_info.addr, srv_info.port);
if (mysrvc == nullptr) {
char* c_hostname { const_cast<char*>(srv_info.addr.c_str()) };
PgSQL_SrvC* mysrvc = new PgSQL_SrvC(
c_hostname, srv_info.port, srv_opts.weigth, MYSQL_SERVER_STATUS_ONLINE, 0, srv_opts.max_conns, 0,
srv_opts.use_ssl, 0, const_cast<char*>("")
);
add(mysrvc,hid);
proxy_info(
"Adding new discovered %s node %s:%d with: hostgroup=%d, weight=%ld, max_connections=%ld, use_ssl=%d\n",
srv_info.kind.c_str(), c_hostname, srv_info.port, hid, mysrvc->weight, mysrvc->max_connections,
mysrvc->use_ssl
);
res = 0;
} else {
// If the server is found as 'OFFLINE_HARD' we reset the 'PgSQL_SrvC' values corresponding with the
// 'servers_defaults' (as in a new 'PgSQL_SrvC' creation). We then later update these values with the
// 'servers_defaults' attributes from its corresponding 'PgSQL_HGC'. This way we ensure uniform behavior
// of new servers, and 'OFFLINE_HARD' ones when a user update 'servers_defaults' values, and reloads
// the servers to runtime.
if (mysrvc && mysrvc->status == MYSQL_SERVER_STATUS_OFFLINE_HARD) {
reset_hg_attrs_server_defaults(mysrvc);
update_hg_attrs_server_defaults(mysrvc, mysrvc->myhgc);
mysrvc->status = MYSQL_SERVER_STATUS_ONLINE;
proxy_info(
"Found healthy previously discovered %s node %s:%d as 'OFFLINE_HARD', setting back as 'ONLINE' with:"
" hostgroup=%d, weight=%ld, max_connections=%ld, use_ssl=%d\n",
srv_info.kind.c_str(), srv_info.addr.c_str(), srv_info.port, hid, mysrvc->weight,
mysrvc->max_connections, mysrvc->use_ssl
);
res = 0;
}
}
return res;
}
int PgSQL_HostGroups_Manager::remove_server_in_hg(uint32_t hid, const string& addr, uint16_t port) {
PgSQL_SrvC* mysrvc = find_server_in_hg(hid, addr, port);
if (mysrvc == nullptr) {
return -1;
}
uint64_t mysrvc_addr = reinterpret_cast<uint64_t>(mysrvc);
proxy_warning(
"Removed server at address %ld, hostgroup %d, address %s port %d."
" Setting status OFFLINE HARD and immediately dropping all free connections."
" Used connections will be dropped when trying to use them\n",
mysrvc_addr, hid, mysrvc->address, mysrvc->port
);
// Set the server status
mysrvc->status=MYSQL_SERVER_STATUS_OFFLINE_HARD;
mysrvc->ConnectionsFree->drop_all_connections();
// TODO-NOTE: This is only required in case the caller isn't going to perform:
// - Full deletion of servers in the target 'hid'.
// - Table regeneration for the servers in the target 'hid'.
// This is a very common pattern when further operations have been performed over the
// servers, e.g. a set of servers additions and deletions over the target hostgroups.
// ////////////////////////////////////////////////////////////////////////
// Remove the server from the table
const string del_srv_query { "DELETE FROM pgsql_servers WHERE mem_pointer=" + std::to_string(mysrvc_addr) };
mydb->execute(del_srv_query.c_str());
// ////////////////////////////////////////////////////////////////////////
return 0;
}
PgSQL_SrvC* PgSQL_HostGroups_Manager::find_server_in_hg(unsigned int _hid, const std::string& addr, int port) {
PgSQL_SrvC* f_server = nullptr;
PgSQL_HGC* myhgc = nullptr;
for (uint32_t i = 0; i < MyHostGroups->len; i++) {
myhgc = static_cast<PgSQL_HGC*>(MyHostGroups->index(i));
if (myhgc->hid == _hid) {
break;
}
}
if (myhgc != nullptr) {
for (uint32_t j = 0; j < myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC* mysrvc = static_cast<PgSQL_SrvC*>(myhgc->mysrvs->servers->index(j));
if (strcmp(mysrvc->address, addr.c_str()) == 0 && mysrvc->port == port) {
f_server = mysrvc;
}
}
}
return f_server;
}
void PgSQL_HostGroups_Manager::HostGroup_Server_Mapping::copy_if_not_exists(Type dest_type, Type src_type) {
assert(dest_type != src_type);
const std::vector<Node>& src_nodes = mapping[src_type];
if (src_nodes.empty()) return;
std::vector<Node>& dest_nodes = mapping[dest_type];
std::list<Node> append;
for (const auto& src_node : src_nodes) {
for (const auto& dest_node : dest_nodes) {
if (src_node.reader_hostgroup_id == dest_node.reader_hostgroup_id &&
src_node.writer_hostgroup_id == dest_node.writer_hostgroup_id) {
goto __skip;
}
}
append.push_back(src_node);
__skip:
continue;
}
if (append.empty()) {
return;
}
if (dest_nodes.capacity() < (dest_nodes.size() + append.size()))
dest_nodes.reserve(dest_nodes.size() + append.size());
for (auto& node : append) {
if (node.srv->status == MYSQL_SERVER_STATUS_SHUNNED ||
node.srv->status == MYSQL_SERVER_STATUS_SHUNNED_REPLICATION_LAG) {
// Status updated from "*SHUNNED" to "ONLINE" as "read_only" value was successfully
// retrieved from the backend server, indicating server is now online.
node.srv->status = MYSQL_SERVER_STATUS_ONLINE;
}
PgSQL_SrvC* new_srv = insert_HGM(get_hostgroup_id(dest_type, node), node.srv);
if (!new_srv) assert(0);
node.srv = new_srv;
dest_nodes.push_back(node);
}
}
void PgSQL_HostGroups_Manager::HostGroup_Server_Mapping::remove(Type type, size_t index) {
std::vector<Node>& nodes = mapping[type];
// ensure that we're not attempting to access out of the bounds of the container.
assert(index < nodes.size());
remove_HGM(nodes[index].srv);
//Swap the element with the back element, except in the case when we're the last element.
if (index + 1 != nodes.size())
std::swap(nodes[index], nodes.back());
//Pop the back of the container, deleting our old element.
nodes.pop_back();
}
void PgSQL_HostGroups_Manager::HostGroup_Server_Mapping::clear(Type type) {
for (const auto& node : mapping[type]) {
remove_HGM(node.srv);
}
mapping[type].clear();
}
unsigned int PgSQL_HostGroups_Manager::HostGroup_Server_Mapping::get_hostgroup_id(Type type, const Node& node) const {
if (type == Type::WRITER)
return node.writer_hostgroup_id;
else if (type == Type::READER)
return node.reader_hostgroup_id;
else
assert(0);
}
PgSQL_SrvC* PgSQL_HostGroups_Manager::HostGroup_Server_Mapping::insert_HGM(unsigned int hostgroup_id, const PgSQL_SrvC* srv) {
PgSQL_HGC* myhgc = myHGM->MyHGC_lookup(hostgroup_id);
if (!myhgc)
return NULL;
PgSQL_SrvC* ret_srv = NULL;
for (uint32_t j = 0; j < myhgc->mysrvs->cnt(); j++) {
PgSQL_SrvC* mysrvc = static_cast<PgSQL_SrvC*>(myhgc->mysrvs->servers->index(j));
if (strcmp(mysrvc->address, srv->address) == 0 && mysrvc->port == srv->port) {
if (mysrvc->status == MYSQL_SERVER_STATUS_OFFLINE_HARD) {
mysrvc->weight = srv->weight;
mysrvc->compression = srv->compression;
mysrvc->max_connections = srv->max_connections;
mysrvc->max_replication_lag = srv->max_replication_lag;
mysrvc->use_ssl = srv->use_ssl;
mysrvc->max_latency_us = srv->max_latency_us;
mysrvc->comment = strdup(srv->comment);
mysrvc->status = MYSQL_SERVER_STATUS_ONLINE;
if (GloPTH->variables.hostgroup_manager_verbose) {
proxy_info(
"Found server node in Host Group Container %s:%d as 'OFFLINE_HARD', setting back as 'ONLINE' with:"
" hostgroup_id=%d, weight=%ld, compression=%d, max_connections=%ld, use_ssl=%d,"
" max_replication_lag=%d, max_latency_ms=%d, comment=%s\n",
mysrvc->address, mysrvc->port, hostgroup_id, mysrvc->weight, mysrvc->compression,
mysrvc->max_connections, mysrvc->use_ssl, mysrvc->max_replication_lag, (mysrvc->max_latency_us / 1000),
mysrvc->comment
);
}
ret_srv = mysrvc;
break;
}
}
}
if (!ret_srv) {
if (GloPTH->variables.hostgroup_manager_verbose) {
proxy_info("Creating new server in HG %d : %s:%d , weight=%ld, status=%d\n", hostgroup_id, srv->address, srv->port, srv->weight, srv->status);
}
proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 5, "Adding new server %s:%d , weight=%ld, status=%d, mem_ptr=%p into hostgroup=%d\n", srv->address, srv->port, srv->weight, srv->status, srv, hostgroup_id);
ret_srv = new PgSQL_SrvC(srv->address, srv->port, srv->weight, srv->status, srv->compression,
srv->max_connections, srv->max_replication_lag, srv->use_ssl, (srv->max_latency_us / 1000), srv->comment);
myhgc->mysrvs->add(ret_srv);
}
return ret_srv;
}
void PgSQL_HostGroups_Manager::HostGroup_Server_Mapping::remove_HGM(PgSQL_SrvC* srv) {
proxy_warning("Removed server at address %p, hostgroup %d, address %s port %d. Setting status OFFLINE HARD and immediately dropping all free connections. Used connections will be dropped when trying to use them\n", (void*)srv, srv->myhgc->hid, srv->address, srv->port);
srv->status = MYSQL_SERVER_STATUS_OFFLINE_HARD;
srv->ConnectionsFree->drop_all_connections();
}
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