Kubernetes plugin gives error when upgrading from 2.2.0p32CEE to 2.3CEEp12

Troubleshooting
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1

CMK version: 2.2.0p32CEE to 2.3CEEp12
OS version: openSUSE Leap 15.5 and Rocky Linux 9.4

Error message:
When doing the upgrade we get the following error:

Cleanup precompiled host and folder files
Verifying Checkmk configuration...
 01/06 Legacy check plug-ins...
 02/06 Rulesets...
 03/06 UI extensions...
 04/06 Agent based plugins...
Incompatible local file '/omd/sites/REDACTED/local/lib/python3/cmk/base/plugins/agent_based/kube_node_conditions.py'.
Error: No module named 'cmk.base.plugins.agent_based.utils.kube'


You can abort the update process (A) and try to fix the incompatibilities or continue the update (c).

Abort the update process? [A/c]

We get this error on rocky 9 and on OpenSUSE 15.5 sites.
It’s only on sites where the kubernetes plugin is active.
Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins)
N/A

I’ve read the upgrade instructions and can’t find anything about the kubernetes plugin being changed. Does anyone might know what’s going on here?
Thank you in advance!

2

We even tried to delete the kubernetes config, update to the 2.3 and added the kubernetes config. But it seems that the kubernetes special agent is completely broken in 2.3?

I can’t find anything in the documentation about anything that changed for the kubernetes monitoring.