[Ubuntu] Pin PostgreSQL version installed in the toolset (#4510)

* Pin PostgreSQL version installed in the toolset

* Source the helpers and resolving comments

images/linux/scripts/installers/postgresql.sh

@@ -1,18 +1,26 @@
 #!/bin/bash -e
 ################################################################################
 ##  File:  postgresql.sh
-##  Desc:  Installs Postgresql
+##  Desc:  Installs PostgreSQL
 ################################################################################
 
+# Source the helpers
+source $HELPER_SCRIPTS/os.sh
+source $HELPER_SCRIPTS/install.sh
+
 REPO_URL="https://apt.postgresql.org/pub/repos/apt/"
 
-#Preparing repo for PostgreSQL 12.
+# Preparing repo for PostgreSQL
 wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
-echo "deb $REPO_URL `lsb_release -cs`-pgdg main" | tee /etc/apt/sources.list.d/pgdg.list
+echo "deb $REPO_URL $(getOSVersionLabel)-pgdg main" | tee /etc/apt/sources.list.d/pgdg.list
 
+# Fetch PostgreSQL version to install from the toolset
+toolsetVersion=$(get_toolset_value '.postgresql.version')
+
+# Install PostgreSQL
 echo "Install PostgreSQL"
 apt update
-apt install postgresql postgresql-client
+apt install postgresql-$toolsetVersion
 
 echo "Install libpq-dev"
 apt-get install libpq-dev

images/linux/scripts/tests/Databases.Tests.ps1

@@ -9,12 +9,19 @@ Describe "MongoDB" {
 }
 
 Describe "PostgreSQL" {
-
     It "PostgreSQL Service" {
         "sudo systemctl start postgresql" | Should -ReturnZeroExitCode
         (Get-CommandResult "pg_isready").Output | Should -Be "/var/run/postgresql:5432 - accepting connections"
         "sudo systemctl stop postgresql" | Should -ReturnZeroExitCode 
     }
+
+    It "PostgreSQL version should correspond to the version in the toolset" {
+        $toolsetVersion = (Get-ToolsetContent).postgresql.version
+        # Client version
+        (psql --version).split()[-1] | Should -BeLike "$toolsetVersion*"
+        # Server version
+        (pg_config --version).split()[-1] | Should -BeLike "$toolsetVersion*"
+    }
 }
 
 Describe "MySQL" {

images/linux/toolsets/toolset-1804.json

@@ -330,5 +330,8 @@
     ],
     "mongodb": {
         "version": "5.0"
+    },
+    "postgresql": {
+        "version": "14"
     }
 }

images/linux/toolsets/toolset-2004.json

@@ -335,5 +335,8 @@
     ],
     "mongodb": {
         "version": "5.0"
+    },
+    "postgresql": {
+        "version": "14"
     }
 }