安装k8s初始化报错[WARNING IsDockerSystemdCheck]

 kubeadm init --config=init-config.yaml
[init] Using Kubernetes version: v1.14.0
[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/
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出现[WARNING IsDockerSystemdCheck]，是由于docker的Cgroup Driver和kubelet的Cgroup Driver不一致导致的，此处选择修改docker的和kubelet一致

docker info | grep Cgroup
Cgroup Driver: cgroupfs

编辑文件/usr/lib/systemd/system/docker.service

ExecStart=/usr/bin/dockerd --exec-opt native.cgroupdriver=systemd

systemctl daemon-reload
systemctl restart docker

 docker info | grep Cgroup
Cgroup Driver: systemd