Fix migration for Postgres 11 (#940)

CHANGELOG.md

@@ -2,6 +2,22 @@
 
 Canonical reference for changes, improvements, and bugfixes for Boundary.
 
+## 0.1.7 (2021/02/16)
+
+*Note* This release fixes an upgrade issue affecting users on Postgres 11
+upgrading to 0.1.5 or 0.1.6 and makes a modification to the `boundary dev`
+environment. It is otherwise identical to 0.1.6; see the entry for that version
+for more details.
+
+### Changes/Deprecations
+
+* `boundary dev` now uses Postgres 11 by default, rather than Postgres 12.
+
+### Bug Fixes
+
+* server: Fix an issue with migrations affecting Postgres 11
+  ([PR](https://github.com/hashicorp/boundary/pull/940))
+
 ## 0.1.6 (2021/02/12)
 
 ### Changes/Deprecations

internal/db/schema/migrations/postgres/1/01_server_tags_migrations.up.sql

@@ -1,8 +1,12 @@
 begin;
 
 -- This series of expressions fixes the primary key on the server table
+-- PG 12+
 alter table session
-  drop constraint session_server_id_server_type_fkey;
+  drop constraint if exists session_server_id_server_type_fkey;
+-- PG 11
+alter table session
+  drop constraint if exists session_server_id_fkey;
 alter table server
   drop constraint server_pkey;
 alter table server

internal/db/schema/postgres_migration.gen.go

@@ -4745,8 +4745,12 @@ create table wh_host_dimension (
 `),
 			1001: []byte(`
 -- This series of expressions fixes the primary key on the server table
+-- PG 12+
 alter table session
-  drop constraint session_server_id_server_type_fkey;
+  drop constraint if exists session_server_id_server_type_fkey;
+-- PG 11
+alter table session
+  drop constraint if exists session_server_id_fkey;
 alter table server
   drop constraint server_pkey;
 alter table server

internal/docker/supported.go

@@ -27,7 +27,7 @@ func startDbInDockerSupported(dialect string) (cleanup func() error, retURL, con
 	var url string
 	switch dialect {
 	case "postgres":
-		resource, err = pool.Run("postgres", "12", []string{"POSTGRES_PASSWORD=password", "POSTGRES_DB=boundary"})
+		resource, err = pool.Run("postgres", "11", []string{"POSTGRES_PASSWORD=password", "POSTGRES_DB=boundary"})
 		url = "postgres://postgres:password@localhost:%s?sslmode=disable"
 		if err == nil {
 			url = fmt.Sprintf("postgres://postgres:password@%s/boundary?sslmode=disable", resource.GetHostPort("5432/tcp"))