docker.service失败。有关详细信息，请参阅'journalctl -xe‘

Question

 docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Thu 2018-05-17 15:47:26 CEST; 17h ago
     Docs: https://docs.docker.com
 Main PID: 11843 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/docker.service

May 18 08:48:38 temp systemd[1]: docker.service: Job docker.service/start failed with result 'dependency'.
May 18 08:49:09 temp systemd[1]: Stopped Docker Application Container Engine.
May 18 08:49:09 temp systemd[1]: Dependency failed for Docker Application Container Engine.
May 18 08:49:09 temp systemd[1]: docker.service: Job docker.service/start failed with result 'dependency'.
May 18 08:49:15 temp systemd[1]: Dependency failed for Docker Application Container Engine.
May 18 08:49:15 temmp systemd[1]: docker.service: Job docker.service/start failed with result 'dependency'.
May 18 09:00:03 temp systemd[1]: Dependency failed for Docker Application Container Engine.
May 18 09:00:03 temp systemd[1]: docker.service: Job docker.service/start failed with result 'dependency'.
May 18 09:03:51 temp systemd[1]: Dependency failed for Docker Application Container Engine.
May 18 09:03:51 temp systemd[1]: docker.service: Job docker.service/start failed with result 'dependency'.

尝试卸载docker并重新安装，但出现相同的错误是docker守护进程正在运行，有人可以在这里帮助我吗。

Answer 1

有一个docker需要的服务没有运行，因此systemd不会启动docker。

尝试启动journalctl -f (不带-u)查看所有单元日志，然后启动docker并仔细阅读日志，您可能会看到一些其他单元尝试启动并失败。

Answer 2

您可以通过运行以下命令找到docker未启动的原因

/usr/bin/dockerd -H unix://

在我的例子中，它是一个新安装的Centos7和Docker18.09

ERRO[2018-11-14T22:14:55.441548150+02:00] 'overlay' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlay support loaded.  storage-driver=overlay2
ERRO[2018-11-14T22:14:55.444930007+02:00] AUFS was not found in /proc/filesystems       storage-driver=aufs
ERRO[2018-11-14T22:14:55.447984399+02:00] 'overlay' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlay support loaded.  storage-driver=overlay

为了解决这个问题，我不得不升级到更新的内核，并删除当前的docker存储

rm -rf /var/lib/docker

然后docker开始工作

Answer 3

我的机器上有这个问题。我没有成功地解决这个问题。但如果你身处困境，你可以这样做

 /usr/bin/dockerd -H unix:///var/run/docker.sock

所有经典命令都将起作用(docker system、docker等)