Enable SSL PostgreSQL configuration through env variables

[tmilicic]

Changes

Please describe.
If this affects the frontend, include screenshots.

Checklist

• All querysets/queries filter by Organization, by Team, and by User
• Django backend tests
• Jest frontend tests
• Cypress end-to-end tests

[Twixes]

Hey! Thanks a lot for the contribution, we'll work on merging this. Are you a Postgres-over-SSL user yourself?

[tmilicic]

Hey! Thanks a lot for the contribution, we'll work on merging this. Are you a Postgres-over-SSL user yourself?

Hey @Twixes, thank you so much!
Yes, I am currently working on setting up Postgres-over-SSL as part of the project for the company I work in. This would really help us and save us some additional code.

[Twixes]

As a side note for our team, after we accept this, but before we merge it, we're going to have to implement the same in https://github.com/PostHog/plugin-server for event processing to work with the same configuration.

[EDsCODE]

Hi @tmilicic, thanks for the contribution! Before accepting this, would you mind adding relevant docs that accompany this change on our docs repo?

[tmilicic]

Hi @tmilicic, thanks for the contribution! Before accepting this, would you mind adding relevant docs that accompany this change on our docs repo?

Hi @EDsCODE, oppened the PR with relevant docs here

[EDsCODE]

Awesome, thanks.

@Twixes do you mind making the addition to the plugin-server? Otherwise, I can pick it up in a short bit

[tmilicic]

Hi, is there something I can do to push this foreward? I saw that docs for this have already been merged

[Twixes]

Hey, so at the moment the plugin server supports connections exclusively using the DATABASE_URL env var, which does support these settings (see brianc/node-postgres#2345), so for me this PR is a go. Just awaiting confirmation from @EDsCODE.
Should you experience any issues @tmilicic with any piece of PostHog not cooperating with Postgres over SSL, let us know.
Disregard the single failing Cypress test causing redness, it's an unrelated problem. #2988

[EDsCODE]

lgtm!

[yakkomajuri]

Hey @tmilicic! Thanks for the PR - email me at yakko[at]posthog[.]com from your GH email to get some merch from us!