[WIP] Support PostgreSQL

[oxyc]

Initial stab att PostgreSQL support #146. I've never used it before so I'll need some help here.

There's quite a bit of todos here

• @geerlingguy we need a php-pgsql role.
• Figure out exactly why the php role always gets skipped when php-mysql is skipped.
• Dashboard needs a lot of work. Might need to re-structure database connections a bit as someone could use both pgsql and mysql.
• What's the deal with admin/root login (mysql root login). No pass?
• Docs
• Figure out if there are any other settings we need to configure (and document)
• Get tests to pass
• Remove travis tests once this is RTBC

[oxyc]

• In the dashboard I set the root postgresql password to Passwordless but I guess this can be changed in the postgresql role somehow. I just dont know how. Anyone with experience who knows how we should do this? Maybe this is good enough for now as it's the default.
• @geerlingguy do you want to separate the php-pgsql installation into a separate role?
• Anyone with PostgreSQL experience who can review this. I have no clue what I'm doing :) It works at least
• @geerlingguy how do you feel about the backwards_compatibility.yml task I added? I prefer this over cluttering all variable references with a default filter at least. My idea is that we leave this in for a while before finally removing it.

[geerlingguy]

Yeah, I'd like to follow the pattern of setting this up in a separate role. Will try to get to that soon.

[oxyc]

@geerlingguy here's a quick patch you can use on top of the php-mysql role (I'm not a reliable maintainer) oxyc/ansible-role-php-pgsql@9445030

Maybe better to name everything postgresql instead of pgsql... Reason I'm keeping to pgsql is because of the database uri schema for drush. Maybe I'm just making it even more confusing though

[oxyc]

I also adressed your 2 suggestions. If we keep them we also need to either remove backwards_compitability.yml or add the variable name changes for drupal_mysql_*. Feels like it's better to just do a major version bump and exclude it.

[geerlingguy]

Version bump++

I'll do one more minor release before merging in these changes, then we can work on a couple other changes for a 3.0

[oxyc]

I removed the backwards_compitabilty.yml. Do you want me to keep one of the travis builds to verify we dont break it? Could minimise the build time by removing a few extra installs such as pimpmylog, varnish, memcached etc.

[geerlingguy]

I'd keep one build - remove all the extra installs so we're just testing the one thing.

[geerlingguy]

I removed the 3.0.0 milestone; don't want this to hold up that release.

[geerlingguy]

@oxyc - As with all branches that sit too long... I couldn't pick up from here easily, so I started a separate branch. Thanks for your awesome work on this, and I hope you're having a great time traveling right now :)

Moving further discussion over to the original issue, #146