KubeZero/docs/v1.24.md

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# KubeZero 1.24
## TODO
## What's new - Major themes
- Cilium is now the default CNI, calico gets removed
- cluster-autoscaler is enabled by default on AWS
- worker nodes are now automatically update to latest AMI and config in a rolling fashion
- integrated Bitnami Sealed Secrets controller
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## Version upgrades
- cilium
- metallb
- nvidia-device-plugin
- aws-node-termination-handler
- aws-ebs-csi-driver
- aws-efs-csi-driver
- istio 1.16
- argocd 2.5.5 + tweaks
- all things prometheus incl. automated muting of certain alarms, eg. CPUOverCommit when cluster-autoscaler is available
### FeatureGates
- PodAndContainerStatsFromCRI
- DelegateFSGroupToCSIDriver
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# Upgrade
`(No, really, you MUST read this before you upgrade)`
Ensure your Kube context points to the correct cluster !
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1. Review CFN config for controller and workers, no mandatory changes during this release though
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2. Upgrade CFN stacks for the control plane *ONLY* !
Updating the workers CFN stacks would trigger rolling updates right away !
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3. Trigger cluster upgrade:
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`./admin/upgrade_cluster.sh <path to the argocd app kubezero yaml for THIS cluster>`
4. Reboot controller(s) one by one
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Wait each time for controller to join and all pods running.
Might take a while ...
5. 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 ...
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6. If all looks good, commit the ArgoApp resouce for Kubezero, before re-enabling ArgoCD itself.
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git add / commit / push `<cluster/env/kubezero/application.yaml>`
7. Head over to ArgoCD and sync all KubeZero modules incl. `pruning` enabled to remove eg. Calico