1587: drop/create database DB before restoring it

[romankuzmik]

SUMMARY

Currently we require re-create PVC used by Postgres or remove all data manually before running restore. See https://github.com/ansible/awx-operator/tree/devel/roles/restore#requirements

This might not be always possible neither it is convenient for end users. This PR introduces simpler solution:

• Force drop existing database
• Re-create empty database
• Resume as usual (pg_resore & Co)

ISSUE TYPE

• New or Enhanced Feature

ADDITIONAL INFORMATION

See Issue 1587

[rooftopcellist]

@romankuzmik I could see how this would be useful, but we probably don't want to run it every time because of the nature of how dangerous DROP DATABASE is. We probably only want users to do this when issues arise.

What do you think about adding a force boolean parameter on the AWXRestore object that would optionally inject those lines into the pg_restore command? That way users could be intentional about doing this.

[TheRealHaoLiu]

@romankuzmik i created a PR based on yours #1639

[romankuzmik]

@TheRealHaoLiu , I like it. Hope we can get an approval and merge it sooner or later.

[rooftopcellist]

Closing as this logic was merged as part of #1639

Thank you for your contribution!

[haifang-zh]

Hi,
I am using AWX-operator of 2.19.1 when I set force_drop_db to true db user 'awx' need privilege of create DB