docker启动报错：Error reading X509 key pair (cert: "/etc/docker/server.pem", key: "/etc/docker/server-key

环境：centos7

命令：systemctl start docker

         systemctl status docker -l

报错：Error reading X509 key pair (cert: "/etc/docker/server.pem", key: "/etc/docker/server-key.pem"): tls: failed to find any PEM data in certificate input. Make sure the key is not encrypted

解决方案：

删除/etc/systemd/system/docker.service文件，执行如下命令

cp /lib/systemd/system/docker.service    /etc/systemd/system/docker.service

systemctl daemon-reload

systemctl start docker