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performancedockerbuilder
Jordan Kostov
Jordan Kostov

Reputation: 117

move default docker container to another place on the disk

We are trying to figure out how to change the target place of the docker container. By default it is created in /var/lib/docker/containers. Lets say I would like to move it to /tmp/docker. All I could find so far was the docker volumes but it is not doing the thing the purpose of this usage is different.

What we want to do is to place the container in the RAM memory of the server so we can significantly reduce the time spent for building binaries.

Is it possible?

Regards, Jordan

Upvotes: 5

Views: 8376

Answers (4)

Greg
Greg

Reputation: 6759

There appears to be a -g command line option, I don't really understand why it is called graph...

It has been deprecated and renamed to --data-root.

--data-root /var/lib/docker              Path to use as the root of the Docker runtime

https://docs.docker.com/reference/commandline/cli/

mkdir /tmp/docker && docker --data-root /var/lib/docker /tmp/docker ...

Upvotes: 5

Amos Folarin
Amos Folarin

Reputation: 2179

See by @thaJeztah https://github.com/docker/docker/issues/3127

It's also possible to use a daemon.json configuration file instead of /etc/default/docker. The /etc/default/docker is only used for systems running upstart, and not for systems running systemd, so is more portable. Also it allows reloading some configuration settings without restarting the daemon;

https://docs.docker.com/engine/reference/commandline/daemon/#daemon-configuration-file

E.g

I'm on Ubuntu 16.04.1, but it shouldn't matter because this is a cross-distro solution.

Just put this json into /etc/docker/daemon.json:

{
"data-root": "/path/to/docker"
}

For the older versions it was "graph" option:

{
"graph": "/path/to/docker"
}

Worked for me and I didn't have to mess with upstart or systemd.

Upvotes: 9

Lalith
Lalith

Reputation: 31

We tried the following steps to Docket container folder to different folder:

Stop Docker service

  1. chkconfig docker off

  2. reboot the server

  3. copy files /var/lib/docker to /targetfolder/docker using rsync -a --sparse --progress /var/lib/docker /apps/docker

  4. Edit Configuration : /lib/systemd/system/docker.service ExecStart=/usr/bin/dockerd -g /targetfolder/docker/

  5. mv /var/lib/docker /var/lib/docker1 (for backup)

  6. ln -s /targetfolder/docker /var/lib/docker (optional - )

7.chkconfig docker on

8.systemctl daemon-reload

9.systemctl restart docker

  1. Start your old containers by referring this command --> docker ps -a

Upvotes: 3

Luciano Mores
Luciano Mores

Reputation: 7

Stop docker service:

service docker stop

Move your containers folder to your ssd:

mv /var/lib/docker/containers /mnt/ssd_example/

Create symlink to default docker container folder:

ln -s /mnt/ssd_example/containers/ /var/lib/docker/containers

Start docker service:

service docker start

Upvotes: -1

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