# Docker Volume Backup

A simple script which creates tarballs from docker volumes and restores
them.

## Usage

### Backup a single volume

`./dvbackup.sh backup <volume_name> <path/to/tarball.tar>`

Creates a tarball from the contents of the volume.

### Restore a single volume

`./dvbackup.sh restore <path/to/tarball.tar> <volume_name>`

Restores the tarball into the volume. *This is destructive*, all old
contents will be removed from the volume. The volume must already exist.

### Backup all named volumes

`./dvbackup.sh backup_all`

Creates backups from all volumes which do not only contain the character
set `[0-9a-f]`.

This command will output a `<volume_name>.tar` file for every found
volume in the current working directory.

### Restore volumes

`./dvbackup.sh restore_all [volume.tar...]`

Restores all given tarballs into their respective volumes. The volumes
must already exist and the operation is *destructive* in the same way
as the `restore` operation. The default behaviour is to ask before
continuing, this can be overridden by setting `DVB_I_KNOW_WHAT_I_DO=y`.
Volumes can be created implicitly by setting `DVB_CREATE_VOLUME=y`.