1. 查看所有的node节点

[root@k8s-master1 ~]# kubectl get node
NAME          STATUS   ROLES                  AGE   VERSION
k8s-master1   Ready    control-plane,master   19d   v1.25.0
k8s-node1     Ready    <none>                 19d   v1.25.0
k8s-node2     Ready    <none>                 19d   v1.25.0

2. 设置集群角色
   设置k8s-master1为 master 角色

[root@k8s-master1 ~]# kubectl label node k8s-master1 node-role.kubernetes.io/master=
node/k8s-master1 labeled

设置 k8s-master1一般情况下不接受pod调度

kubectl taint nodes k8s-master1 node-role.kubernetes.io/master=true:NoSchedule

k8s-master1运行pod

kubectl taint nodes k8s-master1 node-role.kubernetes.io/master-

k8s-master1 不运行pod

kubectl taint nodes k8s-master1 node-role.kubernetes.io/master=:NoSchedule