Hello everyone,

TL;DR if you are not deploying services to the codfw wikikube kubernetes 
cluster, you can safely skip this.

Long version:

We will reinitialize the codfw wikikube kubernetes cluster with kubernetes 
version 1.23 on 2023-02-21 09:00-16:00 UTC [1] (the actual process is expected 
take a couple of hours within this window).
The date was chosen for convenience as we will have depooled all active/active 
services from codfw for row B switch maintenance [2] anyways. As all traffic 
will be drained beforehand we expect no user visible impact. However, for the 
duration of the process, the kubernetes cluster will be unavailable to 
deployers and thus efforts to deploy to it will fail or worse, not have the 
expected outcomes.
This is normal until SRE serviceops announces that the cluster is fully 
operational again.

SRE serviceops will be deploying all services before marking the cluster as 
usable and pooling traffic back to it, so there will be no need for deployers 
to 
re-deploy their services (apart from those already informed).

[1] https://phabricator.wikimedia.org/T329664
[2] https://phabricator.wikimedia.org/T327991

Regars,
Janis Meybohm

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