45 lines
1.6 KiB
Markdown
45 lines
1.6 KiB
Markdown
---
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title: KubeZero 1.22
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---
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# Release notes
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## Custom AMIs
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Starting with 1.22.X, all KubeZero nodes will boot from custom pre-baked AMIs. These AMIs will be provided and shared by the Zero Down Time AWS account.
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This change elimitates *ALL* dependencies at boot time other than container registries. Gone are the days when Ubuntu, SuSE or Github decided to ruin your morning coffee.
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While we are at it, KubeZero also moves from Ubuntu 20.04LTS to Alpine 3.15 as its base OS.
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## Misc
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- new node label `node.kubernetes.io/instance-type` for all nodes containing the EC2 instance type
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- container runtime migrated from runc to crun, reduces memory overhead per pod from 16M to 4M, more info: https://www.redhat.com/sysadmin/introduction-crun
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## Upgrade
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*Ensure your Kube context points to the correct cluster !!!*
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1. Trigger the cluster upgrade:
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`./upgrade_122.sh`
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2. Upgrade CFN stacks for the control plane and all worker groups
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Change Kubernetes version in controller config from `1.21.9` to `1.22.8`
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3. Reboot controller(s) one by one
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Wait each time for controller to join and all pods running.
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Might take a while ...
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4. Migrate ArgoCD config for the cluster
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`./migrate_argo.sh <cluster/env/kubezero/application.yaml>`
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Adjust as needed, eg. ensure eck-operator is enabled if needed.
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git add / commit / push
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Watch ArgoCD do its work.
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5. Replace worker nodes
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Eg. by doubling `desired` for each worker ASG,
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once all new workers joined, drain old workers one by one,
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finally reset `desired` for each worker ASG which will terminate the old workers.
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## Known issues
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