Docker Named Volumes

# main
docker run -it \
    --name voltest \
    -v myvolume:/data \
    ubuntu bash
# list volume
docker volume ls
# inspect
docker volume inspect myvolume
# remove
docker volume rm myvolume
# anonymous volume
-v /path/in/docker/container

docker run -d \
    --name mydb \
    -e POSTGRES_PASSWORD=secret \ # environmental variable
    -v pgdata:/var/lib/postgresql/data \
    postgres