Lemmy: Test server and Ansible

[Nutomic]

Some items related to this:

• [x] fix existing ansible playbook
• [x] add uninstall playbook
• [x] move data from /var/lib/docker/volumes/ to /lemmy/volumes/ for easier administration
• [x] deploy directly from the local git repo
• [x] configure and test automatic mail relay configuration (#473)
• [x] automatic setup on fresh deployment (#404)
• [x] run multiple instances on the same server (because lemmy needs very few resources)
• [ ] import some test data, eg from dev.lemmy.ml?
• [ ] setup automated performance tests?

[Nutomic]

@dessalines what was the thing you mentioned about loading the initial configuration directly into postgres?

[dessalines]

You could set up a lemmy from scratch, add some test data, do a db dump using like docker exec -it dev_lemmy_db_1 > dump.sql .... I forget the commands to dump and restore rn. Stick that test_dump.sql in the repo somewhere.

Then as part of a test deploy, run the postgres command to import that data into the docker db.

[Nutomic]

You think that is stable enough to use for production?

Btw I made a new PR on Gitea.

[dessalines]

It def should only be used for setting up test instances, never for production.

[Nutomic]

It would definitely be nice to have something like that thats good for production use. Also I should have asked this in #404....

[dessalines]

By automatic setup you just mean all the stuff in #404 ? Because that will only fill that site table, it won't create any test comments or anything.

[Nutomic]

Yep thats what I mean. Not sure if it actually makes sense to auto-create posts or comments.

[Nutomic]

@dessalines Guess I can also do the change for running multiple instances on one server now, so we have all the docker-compose related changes in the same release.

[dessalines]

That'd be a good idea.