Vackup: (contraction of "volume backup")
Easily backup and restore Docker volumes using either tarballs or container images. It's designed for running from any host/container where you have the docker CLI.
Note that for open files like databases, it's usually better to use their prefered backup tool to create a backup file, but if you stored that file on a Docker volume, this could still be a way you get the Docker volume into a image or tarball for moving to remote storage for safe keeping.
export/import commands copy files between a local tarball and a volume. For making volume backups and restores.
save/load commands copy files between an image and a volume. For when you want to use image registries as a way to push/pull volume data.
Usage:
vackup export VOLUME FILE
Creates a gzip'ed tarball in current directory from a volume
vackup import FILE VOLUME
Extracts a gzip'ed tarball into a volume
vackup save VOLUME IMAGE
Copies the volume contents to a busybox image in the /volume-data directory
vackup load IMAGE VOLUME
Copies /volume-data contents from an image to a volume