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Change docker's default /var/lib/docker to different directory on Ubuntu
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| 1. Take a backup of docker.service file. | |
| $ cp /lib/systemd/system/docker.service /lib/systemd/system/docker.service.orig | |
| 2. Modify /lib/systemd/system/docker.service to tell docker to use our own directory | |
| instead of default /var/lib/docker. In this example, I am using /p/var/lib/docker | |
| Apply below patch. | |
| $ diff -uP -N /lib/systemd/system/docker.service.orig /lib/systemd/system/docker.service | |
| --- /lib/systemd/system/docker.service.orig 2018-12-05 21:24:20.544852391 -0800 | |
| +++ /lib/systemd/system/docker.service 2018-12-05 21:25:57.909455275 -0800 | |
| @@ -10,7 +10,7 @@ | |
| # the default is not to use systemd for cgroups because the delegate issues still | |
| # exists and systemd currently does not support the cgroup feature set required | |
| # for containers run by docker | |
| -ExecStart=/usr/bin/dockerd -H unix:// | |
| +ExecStart=/usr/bin/dockerd -g /p/var/lib/docker -H unix:// | |
| ExecReload=/bin/kill -s HUP $MAINPID | |
| TimeoutSec=0 | |
| RestartSec=2 | |
| 3. Stop docker service | |
| $ systemctl stop docker | |
| 4. Do daemon-reload as we changed docker.service file | |
| $ systemctl daemon-reload | |
| 5. rsync existing docker data to our new location | |
| $ rsync -aqxP /var/lib/docker/ /p/var/lib/docker/ | |
| 6. Start docker service | |
| $ sysctl docker start |
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@pumuugel82 #6. sudo systemctl deamon-reload <---- daemon spelling correction :-)