Glitch with K8s sidecar deploy: remote charm modified version does not match agent's

[Ben Hoyt]

When I was deploying my snappass-test charm to a microk8s controller, it didn't deploy right away, and I saw a couple of logs in juju debug-log that seem concerning:

unit-snappass-test-0: 13:27:01 INFO juju.worker.uniter remote charm modified version (0) does not match agent's (2)
unit-snappass-test-0: 13:27:01 INFO juju.worker.uniter unit "snappass-test/0" shutting down: agent should be terminated

However, when I looked at it in a couple of minutes it had retried and deployed okay.

I believe this is after tearing down a model and re-adding (or at least removing an application and re-deploying). Harry says: "wondering if k8s still had the StatefulSet and it wasn't destroyed completely".

Full record of commands and logs with more context: https://pastebin.canonical.com/p/Cn5TVXJyWY/

[John A Meinel (jameinel)]

marking as incomplete as we don't have a clear reproducer yet.

[John A Meinel (jameinel)]

I was able to 'juju deploy snappass-test' today and it very quickly
deployed and did not have these messages in the logs.
However, it sounds like this is a problem more for the
delete/deploy/delete/deploy cycle.

Doing a remove-application followed by another deploy, I did see:

controller-0: 11:37:48 WARNING juju.apiserver.caasapplicationprovisioner
ignoring non-existent unit with provider id "snappass-test-0"

But nothing otherwise worrying.

Trying 'juju destroy-model test; juju add-model test2' and then doing
another deploy:

Each test didn't give an error, and each test showed snappass-test running
in significantly under 1min (mostly in the few seconds range).

On Tue, Apr 20, 2021 at 6:55 PM John A Meinel <email address hidden>
wrote:

> ** Changed in: juju
> Milestone: 2.9-rc11 => 2.9.1
>
> ** Changed in: juju
> Importance: Undecided => High
>
> ** Changed in: juju
> Status: Incomplete => Triaged
>
> --
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> https://bugs.launchpad.net/bugs/1924677
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> Title:
> Glitch with K8s sidecar deploy: remote charm modified version does not
> match agent's
>
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[Yang Kelvin Liu (kelvin.liu)]

https://github.com/juju/juju/pull/12933 will be landed to 2.9 to fix this issue