Failed to start Docker Application Container Engine.
下面是我啓動成功後，爲了記錄下前面的錯誤，故意將daemon.conf 重新改爲daemon.json，啓動失敗的記錄
以供大家學習！
[root@izhp37s2whf1q1c504etzsz docker]# mv daemon.json daemon.conf
[root@izhp37s2whf1q1c504etzsz docker]# ll
total 8
-rw-r--r-- 1 root root 250 Apr 22 16:48 daemon.conf
-rw------- 1 root root 244 Apr 11 18:02 key.json
[root@izhp37s2whf1q1c504etzsz docker]# service docker start
Redirecting to /bin/systemctl start docker.service
[root@izhp37s2whf1q1c504etzsz docker]# docker version
Client:
Version: 18.09.4
API version: 1.39
Go version: go1.10.8
Git commit: d14af54266
Built: Wed Mar 27 18:34:51 2019
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 18.09.5
API version: 1.39 (minimum version 1.12)
Go version: go1.10.8
Git commit: e8ff056
Built: Thu Apr 11 04:13:40 2019
OS/Arch: linux/amd64
Experimental: false
[root@izhp37s2whf1q1c504etzsz docker]# systemctl status docker.service
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2019-04-29 16:20:48 CST; 28s ago
Docs: https://docs.docker.com
Main PID: 30693 (dockerd)
Memory: 67.2M
CGroup: /system.slice/docker.service
└─30693 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.155193460+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.253166703+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.253755449+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.683450718+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.820424124+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.946641305+08:00" level=warning
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.946862319+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.948921751+08:00" level=info msg
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz systemd[1]: Started Docker Application Container Engine.
Apr 29 16:20:48 izhp37s2whf1q1c504etzsz dockerd[30693]: time="2019-04-29T16:20:48.969478346+08:00" level=info msg
Hint: Some lines were ellipsized, use -l to show in full.
[root@izhp37s2whf1q1c504etzsz docker]# ll
total 8
-rw-r--r-- 1 root root 250 Apr 22 16:48 daemon.conf
-rw------- 1 root root 244 Apr 11 18:02 key.json
[root@izhp37s2whf1q1c504etzsz docker]# systemctl stop docker.service
[root@izhp37s2whf1q1c504etzsz docker]# ll
total 8
-rw-r--r-- 1 root root 250 Apr 22 16:48 daemon.conf
-rw------- 1 root root 244 Apr 11 18:02 key.json
[root@izhp37s2whf1q1c504etzsz docker]# mv daemon.conf daemon.json
[root@izhp37s2whf1q1c504etzsz docker]# systemctl start docker.service
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.
[root@izhp37s2whf1q1c504etzsz docker]# systemctl status docker.service
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: failed (Result: start-limit) since Mon 2019-04-29 16:33:10 CST; 11s ago
Docs: https://docs.docker.com
Process: 30865 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=1/FAILURE)
Main PID: 30865 (code=exited, status=1/FAILURE)
Apr 29 16:33:08 izhp37s2whf1q1c504etzsz systemd[1]: docker.service: main process exited, code=exited, stat...URE
Apr 29 16:33:08 izhp37s2whf1q1c504etzsz systemd[1]: Failed to start Docker Application Container Engine.
Apr 29 16:33:08 izhp37s2whf1q1c504etzsz systemd[1]: Unit docker.service entered failed state.
Apr 29 16:33:08 izhp37s2whf1q1c504etzsz systemd[1]: docker.service failed.
Apr 29 16:33:10 izhp37s2whf1q1c504etzsz systemd[1]: docker.service holdoff time over, scheduling restart.
Apr 29 16:33:10 izhp37s2whf1q1c504etzsz systemd[1]: start request repeated too quickly for docker.service
Apr 29 16:33:10 izhp37s2whf1q1c504etzsz systemd[1]: Failed to start Docker Application Container Engine.
Apr 29 16:33:10 izhp37s2whf1q1c504etzsz systemd[1]: Unit docker.service entered failed state.
Apr 29 16:33:10 izhp37s2whf1q1c504etzsz systemd[1]: docker.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
[root@izhp37s2whf1q1c504etzsz docker]#