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HoKim98/how-to-replace-kubernetes-etcd.md

Created September 11, 2023 15:47
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Kubernetes ETCD 노드 교체
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how-to-replace-kubernetes-etcd.md

How to Replace Kubernetes ETCD nodes?

  1. Add an ETCD node to existing kubernetes ETCD cluster.
    • etcdctl member add [new-node-name] --peer-urls=https://[new-node-ip]:2380
    • You may use cert files to grant the command like below:
      • --cacert /etc/etcd/ssl/ca.pem
      • --cert /etc/etcd/ssl/admin-[old-node-k8s-name].pem
      • --key /etc/etcd/ssl/admin-[old-node-k8s-name]-key.pem
  2. Update /etc/kubernetes/manifests/kube-apiserver.yaml
    • --etcd-servers=https://[new-node-ip]:2379
    • The kubernetes manifest directory may be differ (i.e. Kubespray)
  3. Restart kubelet service
    • systemctl restart kubelet.service
  4. Wait some seconds and check the K8S cluster is running.
  5. Remove the old ETCD node from your cluster.
    • etcdctl member remove [old-node-id]
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