允许master节点部署pod

0/1 nodes are available: 1 node(s) had taints that the pod didn't tolerate.报错

这是因为k8s集群默认不让在master节点创建pod，也就是说Master Node不参与工作负载。

当前的master节点被打上了node-role.kubernetes.io/master:NoSchedule的污点：

[root@k8s-master k8s]# kubectl describe nodes k8s-master |grep -E '(Roles|Taints)'

①允许master部署pod

[root@k8s-master nginx]# kubectl taint nodes k8s-master node-role.kubernetes.io/master-

  node/k8s-master untainted

②禁止master部署pod

[root@k8s-master]# kubectl taint nodes k8s node-role.kubernetes.io/master=true:NoSchedule