https://docs.docker.com/storage/bind-mounts/
https://docs.docker.com/userguide/dockervolumes/
https://www.digitalocean.com/community/tutorials/how-to-share-data-between-docker-containers
https://www.digitalocean.com/community/tutorials/how-to-share-data-between-the-docker-container-and-the-host

volume backup
https://docs.docker.com/engine/storage/volumes/#back-up-restore-or-migrate-data-volumes

2022
https://www.baeldung.com/ops/docker-volume-listing

:ro
:rw
:z

docker run --volume-driver=...
    flocker, glusterfs, nfs, rexray

    -v /src/webapp:/webapp:ro
    [MacOnly] -v /src/webapp:/webapp:cached

docker volume
    prune
        prune obsolete stuff
    ls -q --f[ilter] 'name=<feature-name>'
    rm ...
    create -d convoy --opt o=size=20GB my-named-volume


docker service create
    --name ...
    --mount type=volume,source=...,destination=/tmp


Local:
https://github.com/CWSpear/local-persist

Convoy:
https://github.com/rancher/convoy
http://rancher.com/introducing-convoy-a-docker-volume-driver-for-backup-and-recovery-of-persistent-data/