docker 启动异常问题处理_loaded: loaded (/etc/systemd/system/docker.service

系统版本：CentOS Linux release 7.6.1810 (Core) 

按照如下方法安装docker以后启动失败：

$ sudo yum update

$ curl -fsSL https://get.docker.com -o get-docker.sh

$ sudo sh get-docker.sh

sudo systemctl start docker

[root@localhost ~]# sudo systemctl start docker
 
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.
 
[root@localhost ~]# systemctl status docker.service
 
● docker.service - Docker Application Container Engine
 
   Loaded: loaded (/etc/systemd/system/docker.service; disabled; vendor preset: disabled)
 
  Drop-In: /etc/systemd/system/docker.service.d
 
           └─mountflags-slave.conf, overlay.conf
 
   Active: failed (Result: exit-code) since 四 2019-03-28 19:00:02 CST; 5s ago
 
     Docs: http://docs.docker.com
 
  Process: 20988 ExecStart=/usr/bin/docker daemon -H fd:// -s overlay (code=exited, status=125)
 
 Main PID: 20988 (code=exited, status=125)
 
 
 
3月 28 19:00:02 localhost.localdomain docker[20988]: tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
 
3月 28 19:00:02 localhost.localdomain docker[20988]: top         Display the running processes of a container
 
3月 28 19:00:02 localhost.localdomain docker[20988]: unpause     Unpause all processes within one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: update      Update configuration of one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: version     Show the Docker version information
 
3月 28 19:00:02 localhost.localdomain docker[20988]: wait        Block until one or more containers stop, then print their exit codes
 
3月 28 19:00:02 localhost.localdomain docker[20988]: Run 'docker COMMAND --help' for more information on a command.
 
3月 28 19:00:02 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
 
3月 28 19:00:02 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
 
3月 28 19:00:02 localhost.localdomain systemd[1]: docker.service failed.
 
用journalctl -xe显示：
 
[root@localhost ~]# journalctl -xe
 
3月 28 19:00:02 localhost.localdomain docker[20988]: pause       Pause all processes within one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: port        List port mappings or a specific mapping for the container
 
3月 28 19:00:02 localhost.localdomain docker[20988]: ps          List containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: pull        Pull an image or a repository from a registry
 
3月 28 19:00:02 localhost.localdomain docker[20988]: push        Push an image or a repository to a registry
 
3月 28 19:00:02 localhost.localdomain docker[20988]: rename      Rename a container
 
3月 28 19:00:02 localhost.localdomain docker[20988]: restart     Restart one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: rm          Remove one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: rmi         Remove one or more images
 
3月 28 19:00:02 localhost.localdomain docker[20988]: run         Run a command in a new container
 
3月 28 19:00:02 localhost.localdomain docker[20988]: save        Save one or more images to a tar archive (streamed to STDOUT by default)
 
3月 28 19:00:02 localhost.localdomain docker[20988]: search      Search the Docker Hub for images
 
3月 28 19:00:02 localhost.localdomain docker[20988]: start       Start one or more stopped containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: stats       Display a live stream of container(s) resource usage statistics
 
3月 28 19:00:02 localhost.localdomain docker[20988]: stop        Stop one or more running containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
 
3月 28 19:00:02 localhost.localdomain docker[20988]: top         Display the running processes of a container
 
3月 28 19:00:02 localhost.localdomain docker[20988]: unpause     Unpause all processes within one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: update      Update configuration of one or more containers
 
3月 28 19:00:02 localhost.localdomain docker[20988]: version     Show the Docker version information
 
3月 28 19:00:02 localhost.localdomain docker[20988]: wait        Block until one or more containers stop, then print their exit codes
 
3月 28 19:00:02 localhost.localdomain docker[20988]: Run 'docker COMMAND --help' for more information on a command.
 
3月 28 19:00:02 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
 
-- Subject: Unit docker.service has failed
 
-- Defined-By: systemd
 
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
 
-- 
 
-- Unit docker.service has failed.
 
-- 
 
-- The result is failed.
 
3月 28 19:00:02 localhost.localdomain polkitd[8238]: Unregistered Authentication Agent for unix-process:20982:70252921 (system bus name :1.664, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, loca
 
3月 28 19:00:02 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
 
3月 28 19:00:02 localhost.localdomain sudo[20981]: pam_unix(sudo:session): session closed for user root
 
3月 28 19:00:02 localhost.localdomain systemd[1]: docker.service failed.
 
3月 28 19:01:01 localhost.localdomain systemd[1]: Started Session 314 of user root.
 
-- Subject: Unit session-314.scope has finished start-up
 
-- Defined-By: systemd
 
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
 
-- 
 
-- Unit session-314.scope has finished starting up.
 
-- 
 
-- The start-up result is done.
 
3月 28 19:01:01 localhost.localdomain CROND[21009]: (root) CMD (run-parts /etc/cron.hourly)
 
3月 28 19:01:01 localhost.localdomain run-parts(/etc/cron.hourly)[21012]: starting 0anacron
 
3月 28 19:01:01 localhost.localdomain run-parts(/etc/cron.hourly)[21018]: finished 0anacron

找了好久不知道什么原因，只能清除/etc/systemd/system/目录下的 docker.service和docker.service.d文件夹

重新安装，搞定！