A procedure to convert anonymous itzg/minecraft-server data volume to a named one

promote-anonymous-mc-volume.sh

# The following will convert the /data from an existing container named "mc"
# into a named volume "mc" and then create a new, re-configured container
# named "mc-new".
# Keep the old container named "mc" until you have confirmed everything is good
# and then you can cleanup using `docker rm mc`

docker stop mc
docker run --rm --volumes-from mc -v mc:/new alpine cp -avT /data /new
docker run -it --name mc-new -v mc:/data -p 25565:25565 -e EULA=TRUE -e MEMORY=2G itzg/minecraft-server