Automatic PostgreSQL update testing

In order to release GitLab 9.0 with PostgreSQL 9.6.1 enabled by default the following tests need to be passing on supported platforms¹

• Fresh install sets up with 9.6.1 by default
  • With default data location
    • Ubuntu:
      • 12.04
      • 14.04
      • 16.04
    • Debian
      • 7
      • 8
    • Centos
      • 6
      • 7
    • Docker
  • With non-default data location
    • Ubuntu:
      • 12.04
      • 14.04
      • 16.04
    • Debian
      • 7
      • 8
    • Centos
      • 6
      • 7
• Upgrading from a previous version with 9.2.18 results in 9.6.1 being installed
  • With default data location
    • Ubuntu:
      • 12.04
      • 14.04
      • 16.04
    • Debian
      • 7
      • 8
    • Centos
      • 6
      • 7
    • Docker
  • With non-default data location
    • Ubuntu:
      • 12.04
      • 14.04
      • 16.04
    • Debian
      • 7
      • 8
    • Centos
      • 6
      • 7
• Upgrading from a previous version with 9.6.1 install does not change anything
  • With default data location
    • Ubuntu:
      • 12.04
      • 14.04
      • 16.04
    • Debian
      • 7
      • 8
    • Centos
      • 6
      • 7
    • Docker
  • With non-default data location
    • Ubuntu:
      • 12.04
      • 14.04
      • 16.04
    • Debian
      • 7
      • 8
    • Centos
      • 6
      • 7
• Upgrading with /etc/gitlab/skip-auto-migrations in place
  • Decide if it should warn or upgrade
  • Implement decisison
• Upgrading with postgresql['enable'] = false should do nothing
  • Ubuntu:
    • 12.04
    • 14.04
    • 16.04
  • Debian
    • 7
    • 8
  • Centos
    • 6
    • 7
  • Docker

1. This is based on the packages we provide and the supported platforms we list