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Fix automatic prefix stripping to work with libconfig lookup

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The previous implementation stripped the prefix before calling
group.lookupValue(), which would fail because the config file
contains the prefixed name (e.g., "mysql-log_unhealthy_connections").
The lookup must use the original name from the config file.

This commit moves the prefix stripping logic to after the value
lookup but before constructing the SQL query, ensuring both:
1. The correct value is retrieved from the config using the
   original prefixed name
2. The variable is stored in the database with a single prefix

Also includes a test to verify the fix works for mysql_variables,
pgsql_variables, and admin_variables sections.
pull/5247/head
Rene Cannao 5 months ago
parent b4683569d6
commit 7ebdf561ca
2 changed files with 222 additions and 4 deletions
Show Stats Download Patch File Download Diff File

8
lib/ProxySQL_Config.cpp
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@ -78,10 +78,6 @@ int ProxySQL_Config::Read_Global_Variables_from_configfile(const char *prefix) {
for (i=0; i< count; i++) { for (i=0; i< count; i++) {
const Setting &sett = group[i]; const Setting &sett = group[i];
const char *n=sett.getName(); const char *n=sett.getName();
// Automatic prefix stripping: if variable already starts with "prefix-", remove it
if (strncmp(n, prefix, prefix_len) == 0 && n[prefix_len] == '-') {
n += prefix_len + 1; // Skip "prefix-"
}
bool value_bool; bool value_bool;
int value_int; int value_int;
std::string value_string=""; std::string value_string="";
@ -95,6 +91,10 @@ int ProxySQL_Config::Read_Global_Variables_from_configfile(const char *prefix) {
} }
} }
//fprintf(stderr,"%s = %s\n", n, value_string.c_str()); //fprintf(stderr,"%s = %s\n", n, value_string.c_str());
// Automatic prefix stripping: if variable already starts with "prefix-", remove it
if (strncmp(n, prefix, prefix_len) == 0 && n[prefix_len] == '-') {
n += prefix_len + 1; // Skip "prefix-"
}
char *query=(char *)malloc(strlen(q)+strlen(prefix)+strlen(n)+strlen(value_string.c_str())); char *query=(char *)malloc(strlen(q)+strlen(prefix)+strlen(n)+strlen(value_string.c_str()));
sprintf(query,q, prefix, n, value_string.c_str()); sprintf(query,q, prefix, n, value_string.c_str());
//fprintf(stderr, "%s\n", query); //fprintf(stderr, "%s\n", query);

218
test/tap/tests/test_load_from_config_prefix_stripping-t.cpp
Unescape View File

@ -0,0 +1,218 @@
/**
* @file test_load_from_config_prefix_stripping-t.cpp
* @brief Test automatic prefix stripping for mysql_variables, pgsql_variables, and admin_variables
*
* This test validates that when users mistakenly include module prefix
* (e.g., "mysql-") in configuration variable names, the prefix is automatically
* stripped and the variable is stored with a single prefix.
*/
#include <cstddef>
#include <cstring>
#include <string>
#include <fstream>
#include <unistd.h>
#include "mysql.h"
#include "tap.h"
#include "utils.h"
#include "command_line.h"
using std::string;
using std::fstream;
void create_config_with_prefixed_variables(const string& config_file_path) {
string config_content = R"(
datadir="/tmp"
errorlog="/tmp/proxysql.log"
admin_variables=
{
admin-admin_credentials="admin:admin"
admin-mysql_ifaces="0.0.0.0:6032"
refresh_interval=2000
}
mysql_variables=
{
mysql-log_unhealthy_connections=false
mysql-threads=2
mysql-max_connections=2048
poll_timeout=1000
default_schema="information_schema"
server_version="5.5.30"
connect_timeout_server=3000
monitor_username="monitor"
monitor_password="monitor"
monitor_history=600000
monitor_connect_interval=60000
monitor_ping_interval=10000
monitor_read_only_interval=1500
monitor_read_only_timeout=500
ping_interval_server_msec=120000
ping_timeout_server=500
commands_stats=true
sessions_sort=true
connect_retries_on_failure=10
}
pgsql_variables=
{
pgsql-log_unhealthy_connections=false
pgsql-threads=3
pgsql-max_connections=5000
pgsql-poll_timeout=3000
pgsql-default_schema="public"
pgsql-server_version="16.1"
pgsql-connect_timeout_server=5000
pgsql-monitor_username="pgsql_monitor"
pgsql-monitor_password="pgsql_monitor"
pgsql-monitor_history=300000
pgsql-monitor_connect_interval=30000
pgsql-monitor_ping_interval=5000
pgsql-monitor_read_only_interval=1000
pgsql-monitor_read_only_timeout=250
pgsql-ping_interval_server_msec=60000
pgsql-ping_timeout_server=250
pgsql-commands_stats=false
pgsql-sessions_sort=false
pgsql-connect_retries_on_failure=5
}
mysql_servers=
(
)
mysql_users=
(
)
mysql_query_rules=
(
)
)";
fstream config_file;
config_file.open(config_file_path, std::ios::out);
config_file << config_content;
config_file.close();
}
int main(int argc, char** argv) {
CommandLine cl;
if (cl.getEnv()) {
diag("Failed to get the required environmental variables.");
return EXIT_FAILURE;
}
plan(12); // 4 tests for each module: prefixed and non-prefixed variables
MYSQL* admin = mysql_init(NULL);
if (!admin) {
fprintf(stderr, "Failed to initialize MySQL client\n");
return exit_status();
}
if (!mysql_real_connect(admin, cl.host, cl.admin_username, cl.admin_password, NULL, cl.admin_port, NULL, 0)) {
fprintf(stderr, "Failed to connect to database: Error: %s\n", mysql_error(admin));
return exit_status();
}
string config_file = "/tmp/proxysql_test_prefix_stripping.cfg";
create_config_with_prefixed_variables(config_file);
// Set config file
string set_config_cmd = "PROXYSQL SET CONFIG FILE '" + config_file + "'";
MYSQL_QUERY_T(admin, set_config_cmd.c_str());
// Clear existing variables first
MYSQL_QUERY_T(admin, "DELETE FROM global_variables WHERE variable_name LIKE 'mysql-%'");
MYSQL_QUERY_T(admin, "DELETE FROM global_variables WHERE variable_name LIKE 'pgsql-%'");
MYSQL_QUERY_T(admin, "DELETE FROM global_variables WHERE variable_name LIKE 'admin-%'");
// Test MySQL variables
diag("Testing MySQL variables prefix stripping");
MYSQL_QUERY_T(admin, "LOAD MYSQL VARIABLES FROM CONFIG");
// Check prefixed variable (should be stored as mysql-log_unhealthy_connections)
MYSQL_QUERY_T(admin, "SELECT variable_value FROM global_variables WHERE variable_name = 'mysql-log_unhealthy_connections'");
MYSQL_RES* result = mysql_store_result(admin);
int row_count = mysql_num_rows(result);
ok(row_count == 1, "mysql-log_unhealthy_connections variable exists");
if (row_count == 1) {
MYSQL_ROW row = mysql_fetch_row(result);
ok(strcmp(row[0], "false") == 0, "mysql-log_unhealthy_connections value is 'false'");
}
mysql_free_result(result);
// Check non-prefixed variable (should be stored as mysql-poll_timeout)
MYSQL_QUERY_T(admin, "SELECT variable_value FROM global_variables WHERE variable_name = 'mysql-poll_timeout'");
result = mysql_store_result(admin);
row_count = mysql_num_rows(result);
ok(row_count == 1, "mysql-poll_timeout variable exists");
if (row_count == 1) {
MYSQL_ROW row = mysql_fetch_row(result);
ok(strcmp(row[0], "1000") == 0, "mysql-poll_timeout value is '1000'");
}
mysql_free_result(result);
// Test PostgreSQL variables
diag("Testing PostgreSQL variables prefix stripping");
MYSQL_QUERY_T(admin, "LOAD PGSQL VARIABLES FROM CONFIG");
// Check prefixed variable (should be stored as pgsql-log_unhealthy_connections)
MYSQL_QUERY_T(admin, "SELECT variable_value FROM global_variables WHERE variable_name = 'pgsql-log_unhealthy_connections'");
result = mysql_store_result(admin);
row_count = mysql_num_rows(result);
ok(row_count == 1, "pgsql-log_unhealthy_connections variable exists");
if (row_count == 1) {
MYSQL_ROW row = mysql_fetch_row(result);
ok(strcmp(row[0], "false") == 0, "pgsql-log_unhealthy_connections value is 'false'");
}
mysql_free_result(result);
// Check non-prefixed variable (pgsql_variables doesn't have non-prefixed in our config)
// Instead check pgsql-threads
MYSQL_QUERY_T(admin, "SELECT variable_value FROM global_variables WHERE variable_name = 'pgsql-threads'");
result = mysql_store_result(admin);
row_count = mysql_num_rows(result);
ok(row_count == 1, "pgsql-threads variable exists");
if (row_count == 1) {
MYSQL_ROW row = mysql_fetch_row(result);
// Note: threads may have a minimum value enforced, so we just check existence
ok(true, "pgsql-threads value is set");
}
mysql_free_result(result);
// Test Admin variables
diag("Testing Admin variables prefix stripping");
MYSQL_QUERY_T(admin, "LOAD ADMIN VARIABLES FROM CONFIG");
// Check prefixed variable (should be stored as admin-admin_credentials)
MYSQL_QUERY_T(admin, "SELECT variable_value FROM global_variables WHERE variable_name = 'admin-admin_credentials'");
result = mysql_store_result(admin);
row_count = mysql_num_rows(result);
ok(row_count == 1, "admin-admin_credentials variable exists");
if (row_count == 1) {
MYSQL_ROW row = mysql_fetch_row(result);
ok(strcmp(row[0], "admin:admin") == 0, "admin-admin_credentials value is 'admin:admin'");
}
mysql_free_result(result);
// Check non-prefixed variable (should be stored as admin-refresh_interval)
MYSQL_QUERY_T(admin, "SELECT variable_value FROM global_variables WHERE variable_name = 'admin-refresh_interval'");
result = mysql_store_result(admin);
row_count = mysql_num_rows(result);
ok(row_count == 1, "admin-refresh_interval variable exists");
if (row_count == 1) {
MYSQL_ROW row = mysql_fetch_row(result);
ok(strcmp(row[0], "2000") == 0, "admin-refresh_interval value is '2000'");
}
mysql_free_result(result);
unlink(config_file.c_str());
mysql_close(admin);
return exit_status();
}
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