[root@localhost ~]# systemctl restart 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 ~]#

[root@localhost ~]# journalctl -xe

Oct 18 12:57:24 localhost.localdomain systemd[1]: Starting Docker Application Container Engine.

— Subject: Unit docker.service has begun start-up

— Defined-By: systemd

— Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

—

— Unit docker.service has begun starting up.

Oct 18 12:57:24 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:24.671424476+05:30″

Oct 18 12:57:25 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:25.742590614+05:30″

Oct 18 12:57:25 localhost.localdomain systemd[1]: Device dev-disk-by\x2duuid-7acdd2e7\x2dc6c7\x

Oct 18 12:57:25 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:25.775414831+05:30″

Oct 18 12:57:25 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:25.785846416+05:30″

Oct 18 12:57:25 localhost.localdomain systemd[1]: docker.service: main process exited, code=exi

Oct 18 12:57:25 localhost.localdomain systemd[1]: Failed to start Docker Application Container

— 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.

Oct 18 12:57:25 localhost.localdomain systemd[1]: Unit docker.service entered failed state.

Oct 18 12:57:25 localhost.localdomain systemd[1]: docker.service failed.

Oct 18 12:57:25 localhost.localdomain polkitd[763]: Unregistered Authentication Agent for unix-

lines 2668-2690/2690 (END)

[root@localhost ~]# systemctl status -l docker.service

? docker.service – Docker Application Container Engine

Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)

Active: failed (Result: exit-code) since Tue 2016-10-18 12:57:25 IST; 6min ago

Docs: https://docs.docker.com

Process: 3547 ExecStart=/usr/bin/dockerd (code=exited, status=1/FAILURE)

Main PID: 3547 (code=exited, status=1/FAILURE)

Oct 18 12:57:24 localhost.localdomain systemd[1]: Starting Docker Application Container Engine…

Oct 18 12:57:24 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:24.671424476+05:30″ level=info msg=”libcontainerd: new containerd process, pid: 3551″

Oct 18 12:57:25 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:25.742590614+05:30″ level=warning msg=”devmapper: Usage of loopback devices is strongly discouraged for production use. Please use `–storage-opt dm.thinpooldev` or use `man docker` to refer to dm.thinpooldev section.”

Oct 18 12:57:25 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:25.775414831+05:30″ level=warning msg=”devmapper: Base device already exists and has filesystem xfs on it. User specified filesystem  will be ignored.”

Oct 18 12:57:25 localhost.localdomain dockerd[3547]: time=”2016-10-18T12:57:25.785846416+05:30″ level=fatal msg=”Error starting daemon: error initializing graphdriver: \”/var/lib/docker\” contains several valid graphdrivers: devicemapper, overlay; Please cleanup or explicitly choose storage driver (-s <DRIVER>)”

Oct 18 12:57:25 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE

Oct 18 12:57:25 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.

Oct 18 12:57:25 localhost.localdomain systemd[1]: Unit docker.service entered failed state.

Oct 18 12:57:25 localhost.localdomain systemd[1]: docker.service failed.

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Docker Advance Tutorial | Part 1 out 16 | — By DevOpsSchool

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Rajesh Kumar

I’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at I reviewed , and SEO strategies at Wizbrand. 

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