PostgreSQL install on Ubuntu/Windows. (#636)

* added windows installation script for postgresql

* removed if from Start-PostreSQL

* added script to packar template.

* changed postgresql.sh for ubuntu.

* postgresql stop and disalbe services.

* change name of the functions

* Stop postgreSQL after validation instead of start.

* added validation and re-work installation prcoedur

* remove redundunt code from psql

* correct intendation

* path to Path

* added PostgreSQL validation procedure.

* Removed useless last line.

* redundunt parameter passed in function call.

* removed repeated part of code.

* removed Stop function since it was useless.

* spaces

* spaces =

* Update Windows2019-Azure.json

* resolve confictls

* added validate and install postgresql

* added password to choco install and variables.

* add new system variables.

* added --params flag

* added correct quotas

* added logging for PostgreSQL install

Co-authored-by: Dariy.Nurgaleev <d.nurgaleev@trueengineering.ru>

images/linux/scripts/installers/postgresql.sh

@@ -7,10 +7,26 @@
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/document.sh
 
+#Preparing repo for PostgreSQL 12.
+wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
+echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" | tee /etc/apt/sources.list.d/pgdg.list
+
+echo "Install PostgreSQL"
+apt update
+apt install postgresql postgresql-client
+
 echo "Install libpq-dev"
 apt-get install libpq-dev
 
-echo "Install Postgresql Client"
-apt-get install postgresql-client
+#Verify that PostgreSQL is ready for accept incoming connections.
+# exit codes:
+# ready - 0
+# reject - 1
+# connection timeout - 2
+pg_isready
 
-DocumentInstalledItem "$(psql -V 2>&1 | cut -d ' ' -f 1,2,3)"
+DocumentInstalledItem "$(psql -V 2>&1 | cut -d ' ' -f 1,2,3)"
+
+# Disable postgresql.service
+systemctl is-active --quiet postgresql.service && systemctl stop postgresql.service
+systemctl disable postgresql.service