[docker] Unknown option dm.basesize

--storage-opt dm.* 옵션은 'Device Mapper' 스토리지 드라이버에서만 사용한다.

이미지와 컨테이너의 크기 제한을 늘리기 위해 dm.basesize 옵션 추가

# vi /usr/lib/systemd/system/docker.service

....

ExecStart=/usr/bin/dockerd --storage-opt dm.basesize=200G

....

docker 데몬 정지 후 docker 디렉토리 백업 (혹은 삭제)

# service docker stop 

# mv /var/lib/docker /var/lib/docker.bnk (rm -rf /var/lib/docker)

변경사항 적용

# systemctl daemon-reload

docker 데몬 실행시 에러 발생

# service docker start

Redirecting to /bin/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.

에러 확인

# service docker status -l

● docker.service - Docker Application Container Engine

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

   Active: failed (Result: exit-code) since 목 2017-03-16 11:06:58 KST; 8s ago

     Docs: https://docs.docker.com

  Process: 27818 ExecStart=/usr/bin/dockerd -g /home/keti/docker --insecure-registry 10.0.0.94:5000 --storage-opt overlay2.override_kernel_check=1 --storage-opt dm.basesize=200G (code=exited, status=1/FAILURE)

 Main PID: 27818 (code=exited, status=1/FAILURE)

   Memory: 380.0K

   CGroup: /system.slice/docker.service

 3월 16 11:06:57 Host dockerd[27818]: time="2017-03-16T11:06:57.607768821+09:00" level=info msg="libcontainerd: new containerd process, pid: 27837"

 3월 16 11:06:58 Host dockerd[27818]: Error starting daemon: error initializing graphdriver: overlay2: Unknown option dm.basesize

해결 방법 

: 옵션 없이 docker 데몬 정상 실행 후 docker 디렉토리가 생성되면 [Ctrl+C]로 docker 데몬을 정지하고, 옵션이 적용된 docker.service로 docker 데몬을 실행한다.

# rm -rf /var/lib/docker

# /usr/bin/dockerd

# [Ctrl+C]

# service docker start