错误日志如下:

8月 25 17:00:37 k8s-node3 kubelet[5491]: E0825 17:00:37.023421    5491 controller.go:136] failed to ensure node lease exists, will retry in 7s, error: leases.coordination.k8s.io "k8s-node3" is forbidden: User "system:node:k8s-node1" cannot get resource "leases" in API group "coordination.k8s.io" in the namespace "kube-node-lease": can only access node lease with the same name as the requesting node
8月 25 17:00:39 k8s-node3 kubelet[5491]: I0825 17:00:39.148315    5491 kubelet_node_status.go:70] Attempting to register node k8s-node3
8月 25 17:00:39 k8s-node3 kubelet[5491]: E0825 17:00:39.150988    5491 kubelet_node_status.go:92] Unable to register node "k8s-node3" with API server: nodes "k8s-node3" is forbidden: node "k8s-node1" is not allowed to modify node "k8s-node3"

错误原因:

        节点主机上名称与主节点上不一致

解决方式:

节点上执行:
    cp /etc/kubernetes/kubelet.conf  /etc/kubernetes/kubelet.conf_bak
主节点上执行:
    kubeadm init phase kubeconfig kubelet --node-name 节点名称 --kubeconfig-dir /tmp/ --apiserver-advertise-address 主节点ip
主节点上执行:
    scp /tmp/kubelet.conf root@节点ip:/etc/kubernetes/
节点上执行:
    systemctl restart kubelet