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KubeZero/docs/upgrade.md

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KubeZero - Cluster upgrade

(No, really, you MUST read this before you upgrade)

Ensure your Kube context points to the correct cluster !

  1. Review CFN config for controller and workers, no mandatory changes during this release though

  2. Upgrade CFN stacks for the control plane ONLY ! Updating the workers CFN stacks would trigger rolling updates right away !

  3. Trigger cluster upgrade:
    ./admin/upgrade_cluster.sh <path to the argocd app kubezero yaml for THIS cluster>

  4. Review the kubezero-config and if all looks good commit the ArgoApp resouce for Kubezero via regular git
    git add / commit / push <cluster/env/kubezero/application.yaml>

  5. Reboot controller(s) one by one
    Wait each time for controller to join and all pods running. Might take a while ...

  6. Upgrade CFN stacks for the workers.
    This in turn will trigger automated worker updates by evicting pods and launching new workers in a rolling fashion. Grab a coffee and keep an eye on the cluster to be safe ... Depending on your cluster size it might take a while to roll over all workers!

  7. Re-enable ArgoCD by hitting on the still waiting upgrade script

  8. Head to the ArgoCD UI and sync all KubeZero apps to verify all are synced successfully.