python3.8 / Ubuntu Focal migration

[jstaph]

A naive PR to migrate to Ubuntu Focal. I'm calling it naive, as I'm unfamiliar with what I should be doing to validate and verify the changes, but it seems to be working for me. Happy for feedback, suggestions, etc.

fixes #53

[arm4b]

That's nice!

Thanks a lot for covering all the places in Dockerfiles 👍

@jstaph Could you also prepare the PRs in docker and K8s repos with the changelog update?
https://github.com/stackStorm/st2-docker/
https://github.com/StackStorm/stackstorm-ha/
And so we could merge them during the next st2 release when the focal docker changes will be promoted to stable.

[jstaph]

Much appreciated! I'll get you PR's for the other repos.

Thanks again for the merge, and the compliment!

[rite2hhh]

@armab

Did this make into StackStorm v3.7?

I don't see the changelog entry (https://github.com/StackStorm/st2-docker/pull/238/files)
for either st2 v3.7 or latest version at https://docs.stackstorm.com/latest/changelog.html.

It's unclear based on the changelog date 2022-05-06 (a day after v3.7 release) vs when the
changes were actually committed (Feb 12)

[arm4b]

@rite2hhh Yes, it's part of the v3.7 Docker images (https://github.com/StackStorm/st2-dockerfiles/blob/v3.7/base/Dockerfile#L1)

The deployment methods like Ansible, Puppet, Docker, or K8s live separated from stackstorm core with their own Changelog.

[rite2hhh]

@armab, thanks for the information, this helps!

[frankpengau]

@armab Thanks for confirming. I wasn't sure that it made it into the stackstorm v3.7 release as well. This helps a lot.