[CKA 도전 시리즈] 4. kubernetes upgrade

 

kubeadm 업데이트

• 참고

https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/

Upgrading kubeadm clusters

 

예제 Kubernetes cluster upgrade

 : kubeadm, kubelet, kubectl을 1.22.4에서 1.23.3 버전으로 업그레이드하시오

 

절차 : 1. 마스터만 kubeadm 업그레이드 -> (2. 노드 드레인 -> 3. kubelet, kubectl 업그레이드-> 4. 노드 uncordon)

 

Control Plane Node & Worker Node에 kubeadm UPGRADE

• kubeadm 업그레이드 할 수 있는 버전 확인

yum list --showduplicates kubeadm --disableexcludes=kubernetes
# find the latest 1.26 version in the list
# it should look like 1.26.x-0, where x is the latest patch

• kubeadm 업그레이드할 버전 설치

# replace x in 1.23.3-0 with the latest patch version
sudo yum install -y kubeadm-1.23.3-0 --disableexcludes=kubernetes

• 버전확인

sudo kubeadm version

• upgrade plan 확인

sudo kubeadm upgrade plan v1.23.0

• kubeadm upgrade (control plane)

# replace x with the patch version you picked for this upgrade
sudo kubeadm upgrade apply v1.23.3

• kubeadm upgrade (worker)

sudo kubeadm upgrade hk8s-w1

 

반응형

 

 

Control Plane Node & Worker Node에  kubelet, kubectl UPGRADE

• Node Drain (노드에 스케줄링 되지 않도록 하는것), console에서

# replace <node-to-drain> with the name of your node you are draining
kubectl drain hk8s-m --ignore-daemonsets

• kubelet, kubectl 업데이터할 버전 설치

# replace x in 1.26.x-0 with the latest patch version
sudo yum install -y kubelet-1.23.3-0 kubectl-1.23.3-0 --disableexcludes=kubernetes

• kubelet 재시작

sudo systemctl daemon-reload
sudo systemctl restart kubelet

• 노드 uncordon (다시 스케줄링 되도록), console에서

# replace <node-to-uncordon> with the name of your node
kubectl uncordon hk8s-m

 

워커노드들도 동일하게 kubeadm, kubectl, kubelet 모두 업데이트하면 끝.

 

 

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Thank you!