学习Docker遇到问题，不知道有人懂吗？

▃黑衣大葛格

修改

/etc/docker/daemon.json

文件，修改前，如下

{
    "labels": ["name=service_1"],
    "registry-mirrors": ["https://registry.docker-cn.com"]
}

可以正常启动，安装官方文档修改成

{
    "labels": ["name=service_1"],
    "registry-mirrors": ["https://registry.docker-cn.com"],
    "debug": true,
    "tls": true,
    "tlscert": "/var/docker/server.pem",
    "tlskey": "/var/docker/serverkey.pem",
    "hosts": ["tcp://192.168.31.230:2376"]
}

无法启动，不知道是啥情况
报错描述：

jon@jon-VirtualBox:~$ sudo service docker restart 
Job for docker.service failed because the control process exited with error code.
See "systemctl status docker.service" and "journalctl -xe" for details.

- systemctl status docker.service：

jon@jon-VirtualBox:~$ systemctl status docker.service
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sun 2018-07-22 11:24:21 CST; 13min ago
     Docs: https://docs.docker.com
  Process: 12846 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=1/FAILURE)
 Main PID: 12846 (code=exited, status=1/FAILURE)

7月 22 11:24:20 jon-VirtualBox systemd[1]: Failed to start Docker Application Container Engine.
7月 22 11:24:21 jon-VirtualBox systemd[1]: docker.service: Service hold-off time over, scheduling restart.
7月 22 11:24:21 jon-VirtualBox systemd[1]: docker.service: Scheduled restart job, restart counter is at 3.
7月 22 11:24:21 jon-VirtualBox systemd[1]: Stopped Docker Application Container Engine.
7月 22 11:24:21 jon-VirtualBox systemd[1]: docker.service: Start request repeated too quickly.
7月 22 11:24:21 jon-VirtualBox systemd[1]: docker.service: Failed with result 'exit-code'.
7月 22 11:24:21 jon-VirtualBox systemd[1]: Failed to start Docker Application Container Engine.
7月 22 11:24:22 jon-VirtualBox systemd[1]: docker.service: Start request repeated too quickly.
7月 22 11:24:22 jon-VirtualBox systemd[1]: docker.service: Failed with result 'exit-code'.
7月 22 11:24:22 jon-VirtualBox systemd[1]: Failed to start Docker Application Container Engine.

不知道有没有人可以解答