kubeadm join 失败
现象:
[root@k8s-node02 ~]# kubeadm join 192.168.76.6:6443 --token b9ov87.cn3uyf3nd4s1mh1s --discovery-token-ca-cert-hash sha256:7ebc5d0c713c5d90f6f12a1808da157047c16d3786b762f5857944bcab83fcce
[preflight] Running pre-flight checks
[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[preflight] Reading confi