Andy Kononov

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Posts posted by Andy Kononov

  1. found solution

    First create directory and file for custom configuration:

    sudo mkdir -p /etc/systemd/system/docker.service.d sudo $EDITOR /etc/systemd/system/docker.service.d/docker-storage.conf

    For docker version before 17.06-ce paste:

    [Service] ExecStart= ExecStart=/usr/bin/docker daemon -H fd:// --graph="/mnt"

    For docker after 17.06-ce paste:

    [Service] ExecStart= ExecStart=/usr/bin/dockerd -H fd:// --data-root="/mnt"

    Alternative method through daemon.json

    I recently tried above procedure with 17.09-ce on Fedora 25 and it seem to not work. Instead of that simple modification in /etc/docker/daemon.json do the trick:

    { "graph": "/mnt", "storage-driver": "overlay" }

    Despite the method you have to reload configuration and restart Docker:

    sudo systemctl daemon-reload sudo systemctl restart docker

    To confirm that Docker was reconfigured:

    docker info|grep "loop file"

    In recent version (17.03) different command is required:

    docker info|grep "Docker Root Dir"

    Output should look like this:

    Data loop file: /mnt/devicemapper/devicemapper/data Metadata loop file: /mnt/devicemapper/devicemapper/metadata


    Docker Root Dir: /mnt

    Then you can safely remove old Docker storage:

    rm -rf /var/lib/docker