今天突然发现docker暂停了，启动不起来，文字描述如下：
[root@hfwas /]# docker ps Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? [root@hfwas /]# [root@hfwas /]# [root@hfwas /]# [root@hfwas /]# 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@hfwas /]# [root@hfwas /]# [root@hfwas /]# 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.
执行jouranalctl -xe 查看具体的报错信息如下所示：
[root@hfwas /]# journalctl -xe -- -- 启动结果为“done”。 4月 22 23:12:01 hfwas systemd[1098]: Reached target Default. -- Subject: UNIT 单元已结束启动 -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- UNIT 单元已结束启动。 -- -- 启动结果为“done”。 4月 22 23:12:01 hfwas systemd[1098]: Startup finished in 27ms. -- Subject: User manager start-up is now complete -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- The user manager instance for user 0 has been started. All services queued -- for starting have been started. Note that other services might still be starting -- up or be started at any later time. -- -- Startup of the manager took 27896 microseconds. 4月 22 23:12:01 hfwas systemd[1]: Started User Manager for UID 0. -- Subject: user@0.service 单元已结束启动 -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- user@0.service 单元已结束启动。 -- -- 启动结果为“done”。 4月 22 23:12:01 hfwas sshd[1094]: pam_unix(sshd:session): session opened for user root by (uid=0) 4月 22 23:12:07 hfwas chronyd[737]: Selected source 100.100.61.88 4月 22 23:12:07 hfwas chronyd[737]: System clock wrong by 1.029488 seconds, adjustment started 4月 22 23:12:08 hfwas systemd[1]: NetworkManager-dispatcher.service: Succeeded. -- Subject: Unit succeeded -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- The unit NetworkManager-dispatcher.service has successfully entered the 'dead' state. 4月 22 23:12:14 hfwas systemd[1]: docker.service: Start request repeated too quickly. 4月 22 23:12:14 hfwas systemd[1]: docker.service: Failed with result 'exit-code'. -- Subject: Unit failed -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- The unit docker.service has entered the 'failed' state with result 'exit-code'. 4月 22 23:12:14 hfwas systemd[1]: Failed to start Docker Application Container Engine. -- Subject: docker.service 单元已失败 -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- docker.service 单元已失败。 -- -- 结果为“failed”。 4月 22 23:12:18 hfwas systemd[1]: docker.service: Start request repeated too quickly. 4月 22 23:12:18 hfwas systemd[1]: docker.service: Failed with result 'exit-code'. -- Subject: Unit failed -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- The unit docker.service has entered the 'failed' state with result 'exit-code'. 4月 22 23:12:18 hfwas systemd[1]: Failed to start Docker Application Container Engine. -- Subject: docker.service 单元已失败 -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- docker.service 单元已失败。 -- -- 结果为“failed”。 4月 22 23:12:27 hfwas systemd[1]: systemd-hostnamed.service: Succeeded. -- Subject: Unit succeeded -- Defined-By: systemd -- Support: https://access.redhat.com/support -- -- The unit systemd-hostnamed.service has successfully entered the 'dead' state.
截图如下：
经过谷歌搜索得到结局办法：
- 删除/etc/docker/daemon.json文件，然后重启docker
- 在执行systemctl start docker.service
资料链接：
- https://stackoverflow.com/questions/49110092/failed-to-start-docker-application-container-engine
- 截图如下：
