An utility to backup and restore docker volumes.

Note: Make sure no container is using the volume before backup or restore, otherwise your data might be damaged.

Syntax:

docker run -v [volume-name]:/volume -v [output-dir]:/backup --rm loomchild/volume-backup backup [archive-name]

For example:

docker run -v some_volume:/volume -v /tmp:/backup --rm loomchild/volume-backup backup some_archive

will archive volume named some_volume to /tmp/some_archive.tar.bz2 archive file.

This avoids mounting a second backup volume and allows to redirect it to a file, network, etc.

WARNING: This method should not be used with a Docker for Windows installation; no usable backup will be generated.

Syntax:

docker run -v [volume-name]:/volume --rm loomchild/volume-backup backup - > [archive-name]

For example:

docker run -v some_volume:/volume --rm loomchild/volume-backup backup - > some_archive.tar.bz2

will archive volume named some_volume to some_archive.tar.bz2 archive file.

Note: This operation will delete all contents of the volume

Syntax:

docker run -v [volume-name]:/volume -v [output-dir]:/backup --rm loomchild/volume-backup restore [archive-name]

For example:

docker run -v some_volume:/volume -v /tmp:/backup --rm loomchild/volume-backup restore some_archive

will clean and restore volume named some_volume from /tmp/some_archive.tar.bz2 archive file.

This avoids mounting a second backup volume.

Note: Don't forget the -i switch for interactive operation.

WARNING: This method should not be used with a Docker for Windows installation; no usable backup will be generated.

Syntax:

cat [archive-name] | docker run -i -v [volume-name]:/volume --rm loomchild/volume-backup restore -

For example:

cat some_archive.tar.bz2 | docker run -i -v some_volume:/volume --rm loomchild/volume-backup restore -

will clean and restore volume named some_volume from some_archive.tar.bz2 archive file.