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# general
a
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b
You're getting kinda behind on supported versions there... but I'd recommend a blue/green deployment to get you into a better supported place so you can avoid this in the future.
If you don't have a the resources for a blue/green strategy, Doing the nodes one at a time is likely your best bet.
I'd do the OS first, then the k8s versions in round 2 like a normal deployment.
Rancher isn't going to care about the underlying OS unless you used a provisioner, which it sounds like you didnt.
h
considering RKE is about to be EOL it may make sense to create an RKE2/K3s cluster on RHEL8/9 and migrate your apps? https://www.suse.com/support/kb/doc/?id=000021513
here is support matrix to review when you are doing OS/Kubernetes/Rancher upgrades https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/rancher-v2-10-1/
l
In addition to what @hundreds-evening-84071 said, we also have a guide to replatform from RKE to RKE2 that you might find helpful - https://www.suse.com/support/kb/doc/?id=000021518
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