Cluster Upgrade

参考

• https://kubernetes.io/docs/tasks/administer-cluster/cluster-upgrade/
• https://kubernetes.io/docs/reference/using-api/deprecation-guide/
• https://docs.aws.amazon.com/ja_jp/eks/latest/userguide/update-cluster.html
• https://speakerdeck.com/shmurata/strategy-to-upgrade-kubernetes-clusters-in-production
• https://repost.aws/ja/knowledge-center/eks-plan-upgrade-cluster
• https://docs.aws.amazon.com/eks/latest/userguide/kubernetes-versions.html#kubernetes-release-calendar

アップグレード戦略

1. Live Upgrade(in-place upgrade)
   • https://speakerdeck.com/shmurata/strategy-to-upgrade-kubernetes-clusters-in-production?slide=23
2. Blue/Green Upgrade
   • https://speakerdeck.com/shmurata/strategy-to-upgrade-kubernetes-clusters-in-production?slide=32

準備

1. Kubernetesバージョンの変更点の確認
   • https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
   • https://github.com/kubernetes/kubernetes/releases
   • https://kubernetes.io/releases/
   • AWS EKS
   • https://docs.aws.amazon.com/eks/latest/userguide/kubernetes-versions.html
   • https://docs.aws.amazon.com/ja_jp/eks/latest/userguide/update-cluster.html
2. 非推奨や削除されたAPIを使っているaddonを見つける
   • https://kubernetes.io/docs/reference/using-api/deprecation-guide/
   • Pluto
     • https://github.com/FairwindsOps/pluto
     • Kubernetesの非推奨(deplicated api)を自動検出する
     • https://kakakakakku.hatenablog.com/entry/2022/07/20/091424
     • https://zenn.dev/johnn26/articles/detect-kubernetes-deplicated-api-automatically
   • e.g.
     • Kyverno
       • https://kyverno.io/policies/best-practices/check_deprecated_apis/check_deprecated_apis/

3. Node

4. Addonのアップグレード計画

アップグレード

AWS EKS

1. EKS Cluster Upgrade
2. ManagedNodeGroup Upgrade
3. eks-optimized AMIをUpgreade対象のcluster versionと一致するものにする