[K8S] Kubespray로 만든 Kubernetes 클러스터의 Master 1번 Node 장애 복구

[HAWKEYE] kernel::  [22329228.540857] blk_update_request: I/O error, dev sda, sector 795030104 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0, at 

[kube_control_plane]
 node-1
 node-2
 node-3

-> 

[kube_control_plane]
 node-2
 node-3
 node-1

kubectl edit cm -n kube-public cluster-info

# swapoff
sudo swapoff -a

# systemd-resolved 실행
sudo systemctl start systemd-resolved.service

# docker 설치
sudo apt-get install docker
mkdir -p /etc/systemd/system/docker.service.d
sudo systemctl daemon-reload
sudo systemctl enable docker.service
sudo systemctl start docker.service

# nf conntrack 설치
sudo apt-get install -y conntrack

# kubeadm 설치
chmod 750 kubeadm
sudo mv kubeadm /usr/local/bin/

# Kubelet 설치
sudo mv kubelet /usr/local/bin/ && sudo chmod 750 /usr/local/bin/kubelet
sudo vi /etc/systemd/system/kubelet.service

sudo systemctl enable kubelet.service

# copy certificates
mkdir -p /etc/kubernetes/ssl/
#copy /etc/kubernetes/ssl

mkdir -p /etc/ssl/etcd/ssl
#copy /etc/ssl/etcd/ssl

# CNI 설치
sudo mkdir -p /opt/cni/bin
sudo mv cni-plugins-linux-amd64-v0.9.1.tgz /opt/cni/bin
tar -xvf cni-plugins-linux-amd64-v0.9.1.tgz

# control plane 추가
sudo kubeadm token create --print-join-command
sudo kubeadm join X.X.X.X:6443 --token X --discovery-token-ca-cert-hash sha256:X --control-plane --v=5 --skip-phases control-plane-join/etcd