backup and restore volume

ref_link

backup

backup a named volume to the backup directory in the current path, with the date message append to its name, the volume should be listed in docker volume ls

usage:

./backup.sh named_volume

backup multi volumes by the usual way like:

docker volume ls -q | grep some_key_word | xargs -i ./backup.sh {}

restore

restore a volume from the backup directory in the current path, the restored volume's name would withdraw the date message, contrary to backup, the name should not be listed in docker volume ls (just prevent mistake)

usage:

./restore.sh backup/volume_to_restore-yyyy-mm-dd-hh-mm-ss

restore multi volumes:

ls backup/ | grep some_key_word | xargs -i ./restore.sh {}

notice

If start containers with docker-compose.yaml, maybe come with a warning xxx already exists but was not created by Docker Compose. Use `external: true` after restoring, I would sign the volumes with external: true, and create it the first time.

# creat volume
docker volume create xxx_volume`

# docker-compose.yaml

volumes:
  xxx_volume:
    name: xxx_volume
    external: true