docker拉取镜像失败报错：
Failed to pull image "192.168.31.43:30004/kube-deploy/kube-webhook-certgen:v1.3.0": rpc error: code = Unknown desc = Error response from daemon: Get "https://192.168.31.43:30004/v2/": x509: cannot validate certificate for 192.168.31.43 because it doesn't contain any IP SANs
vim /usr/lib/systemd/system/docker.service
在ExecStart末尾添加：
--insecure-registry=192.168.31.43:30003
