Change Docker Default Location

The most recent method to change the default data directory location is edit

/lib/systemd/system/docker.service

Replace the ExecStart value with the following:

ExecStart=/usr/bin/dockerd --graph="/mnt/blockstorage/" -H fd://

Replace graph=”” with the location of your new storage.

or

Edit /etc/docker/daemon.json

{
“graph”: “/mnt/blockstorage”
}