kubernetes初始化報錯Get "http://localhost:10248/healthz": dial tcp 127.0.0.1:10248: connect: connection refused.的解決辦法

k8s使用kubeadm初始化報如下錯誤：

[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp 127.0.0.1:10248: connect: connection refused.

原因：

docker的cgroup驅動程序默認設置為system。默認情況下Kubernetes cgroup為systemd，我們需要更改Docker cgroup驅動，

解決辦法：

kubeadm reset

vim /etc/docker/daemon.json

{
  "registry-mirrors": ["https://82m9ar63.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"]
}

[root@master01 ~]# systemctl daemon-reload

systemctl restart docker

重新初始化即可成功。