domain: docs.docker.com · 6 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Create the target volume if it does not exist: docker volume create mydata
Run a helper container that mounts the volume and unpacks the backup into it: docker run --rm -v mydata:/data -v $(pwd):/backup ubuntu tar xvf /backup/backup.tar -C /data
For a gzip archive add z: tar xzvf /backup/backup.tar.gz -C /data
If the backup used relative paths, they land relative to the mount's root as expected from -C /data
Restart the application containers so they pick up the restored data (the mount reflects it immediately, but restart guarantees clean state)
Verify a known file or checksum after extract
Known gotchas
Restoring into a non-empty volume merges over existing contents - clear the target first if you want a pristine restore
Match the tar's path layout: extracting with -C /data reproduces the original tree only if the backup was created with a matching -C /data
A helper container with --rm is removed on exit; if extraction fails, mount and inspect instead of assuming clean state
Ensure the application is stopped during restore to avoid mid-write corruption
Official docs: https://docs.docker.com/storage/volumes/ (back up, restore, or migrate data volumes)
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