文章目录

• 1. 查看节点
• 2. 增加节点
• 3. 删除节点

1. 查看节点

kubectl  get nodes

2. 增加节点

 若maser初始化成功后  kubeadm join xxx ， 如果忘记，则在master节点上执行             #kubeadm token list
 
 若默认token 24小时过期，后续机器要加入集群需要重新使用下面命令重新生成token
 #kubeadm token create
 
 获取ca证书sha256编码hash值
 #openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'

 
 添加worker节点 
 #kubeadm join --token <重新生成的token值> 192.168.1.105:6443 --discovery-token-ca-cert-hash sha256:<sha256编码值>
 
 或者指定配置文件
 #kubadm join  --config  kubeadm-config.yaml
 #cat kubeadm-config.yaml 
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 192.168.86.137
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  name: 192.168.86.137
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.17.17
networking:
  dnsDomain: cluster.local
  serviceSubnet: 10.96.0.0/12
  podSubnet: 10.244.0.0/16
scheduler: {}

 
 重新添加已经添加过的节点，请先初始化
 #kubeadm reset

3. 删除节点

1. 驱逐节点（drain 翻译排出，此时卸载节点，但是没有删除）
   #kubectl drain --delete-local-data --force --ignore-daemonsets

2. 删除节点
   kubectl delete node

3. 清空init配置，需要删除的节点上执行
   kubeadm reset