初始化集群报以下错误：
```
error execution phase preflight: [preflight] Some fatal errors occurred:
	[ERROR CRI]: container runtime is not running: output: E0526 20:04:52.510582   13459 remote_runtime.go:925] "Status from runtime service failed" err="rpc error: code = Unimplemented desc = unknown service runtime.v1alpha2.RuntimeService"
```
解决方法：
```
rm /etc/containerd/config.toml
systemctl restart containerd
```
或者
```
cat > /etc/containerd/config.toml <<EOF
[plugins."io.containerd.grpc.v1.cri"]
  systemd_cgroup = true
EOF
systemctl restart containerd

```