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Upgrade AUX clusters to kubernetes 1.31
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Description

The clusters are currently running Kubernetes 1.23 which went EOL on 2023-02-08. Kubernetes 1.31 is running in production (wikikube) since July 2025.
It's time to upgrade since we plan on moving to the next (>1.31) Kubernetes version already and we aim to support not more then two versions at the same time.

https://wikitech.wikimedia.org/wiki/Kubernetes/Clusters/Upgrade/1.31

Event Timeline

I discussed with @LSobanski about fitting this in Q3 or Q4 planning.

We'll confirm a realistic timeline at SRE Summit and update after.

LSobanski triaged this task as Medium priority.Mon, Jan 19, 3:41 PM
LSobanski added a subscriber: elukey.

Unless anything unexpected happens, @elukey will handle this towards the end of the quarter.

Please note that https://phabricator.wikimedia.org/T383553 needs to be done as part of the upgrade :)