[연습]10. kubeadm upgrade

1. 컨트롤 플레인 노드 업그레이드

master node 에서 실행
yum install -y kubeadm-1.26.x-0 --disableexcludes=kubernetes

다운로드 결과 조회
kubeadm version

업그레이드 계획 확인
sudo kubeadm upgrade plan v.1.2x.x

2. kubeadm upgrade

sudo kubeadm upgrade apply v1.2x.x

결과 확인
[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.26.x". Enjoy!

[upgrade/kubelet] Now that your control plane is upgraded, please proceed with upgrading your kubelets if you haven't already done so.

3. node drain

kubectl drain <node-to-drain> --ignore-daemonsets

4. kubelet and kubectl upgrade

yum install -y kubelet-1.2x.x-0 kubectl-1.2x.x-0 --disableexcludes=kubernetes

5. kubelet reolad and uncordon

sudo systemctl daemon-reload
sudo systemctl restart kubelet

kubectl uncordon <node-to-drain>

---

6. workernode upgrade

wokernode 에서
yum install -y kubeadm-1.2x.x-0 --disableexcludes=kubernetes

sudo kubeadm upgrade node

7. node drain and kubelet/kubectl upgrade

kubectl drain <node-to-drain> --ignore-daemonsets

yum install -y kubelet-1.2x.x-0 kubectl-1.2x.x-0 --disableexcludes=kubernetes

8. kubelet restart

sudo systemctl daemon-reload
sudo systemctl restart kubelet

kubectl uncordon <node-to-drain>