systemctl start docker error시

이런저런 작업을 하다가 docekr daemon 재 시작시 아래와 같은 메세지가 나올수 있다

[root@kiwitest01 docker.service.d]# systemctl start docker

Failed to start docker.service: Unit is not loaded properly: Invalid argument.

See system logs and 'systemctl status docker.service' for details.

root@kiwitest01 docker.service.d]# systemctl status docker.service

â— docker.service - Docker Application Container Engine

   Loaded: error (Reason: Invalid argument)

  Drop-In: /etc/systemd/system/docker.service.d

           â””─override.conf

   Active: inactive (dead)

     Docs: https://docs.docker.com

Mar 23 16:17:32 kiwitest01 systemd[1]: docker.service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.

요럴땐

vi /etc/systemd/system/docker.service.d/override.conf

-------- 변경전 ----------------

[Service]

Restart=always

StartLimitInterval=0

RestartSec=15

ExecStartPre=-/sbin/ip link del docker0

ExecStart=/usr/bin/dockerd --storage-driver=overlay

위에 처럼 된것에 

[Service]

Restart=always

StartLimitInterval=0

RestartSec=15

ExecStartPre=-/sbin/ip link del docker0

ExecStart=

ExecStart=/usr/bin/dockerd --storage-driver=overlay

요렇게 ExecStart를 하나더 추가해주면 된다.

요렇게 하고 systemctl start docker

안되면 systemctl daemon-reload 

그리고 나서 systemctl start docker

이상~~끝

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