Charm Octavia fails to install on Lunar

[David Negreira]

This is due to the issue of Lunar having a new python version and the wheels are not able to be installed.

We see the following error on the logs:

2023-07-11 13:49:29 WARNING unit.octavia/0.install logger.go:60 ERROR: Could not find a version that satisfies the requirement MarkupSafe==2.1.2 (from versions: none)
2023-07-11 13:49:29 WARNING unit.octavia/0.install logger.go:60 ERROR: No matching distribution found for MarkupSafe==2.1.2

If we enter the virtualenv and install the MarkupSafe manually then the charm installs correctly.

This is a similar issue that we had in OVN: https://bugs.launchpad.net/charm-ovn-central/+bug/2019996

The fix was to build the charm in Lunar, as an example: https://review.opendev.org/c/x/charm-ovn-central/+/883435

[Alex Kavanagh (ajkavanagh)]

There's current a problem building on interim (non-LTS) releases; only charmcraft latest/edge supports it, and that has a bug at the moment: https://github.com/canonical/charmcraft/issues/1150.

[David Negreira (dnegreira)]

Hi @Alex, gentle nudge, seems that the issue on github has been closed, but the issue in Octavia still exists.

[Alex Kavanagh (ajkavanagh)]

Hi David; the issue for lunar is a little different for the 2023.1 charm (which I'm guessing you are using?). The latest/edge charm *should* work on lunar; the 2023.1 charm still has a charmcraft.yaml that builds on 22.04 to run on 23.04, which doesn't work as the octavia charm is a "binary" charm (builds binary wheels) and so isn't compatible with the python version that runs on lunar.

If you *are* talking about the latest/edge charm, then it's a different reason?

Please could you confirm which channel you are using?

Thanks.

[David Negreira (dnegreira)]

Hi Alex,

Apologies for not providing more details, the charm I was using was indeed the 2023.1/stable, the latest/edge channel works as expected on lunar and I can use the charm.

[Alex Kavanagh (ajkavanagh)]

Thanks David for the confirmation; I've upped the priority a bit, as it's a relatively simple fix to change the charmcraft.yaml to build for lunar; it'll also need a bump in the charmcraft version in osci.yaml (I suspect) to be able to build for lunar.