How To Migrate From Docker Volumes to External Storage - Stephen Foskett, Pack Rat

Maybe I'm a caveman or a fool, but I don't love Docker volumes. By moving data to a host filesystem I can manage the data more easily using standard software, and can modify it more easily if needed. The little trick of using tar to pipe data out of a Docker volume allowed me to do this with applications like Postgres, Redis, and MySQL, not to mention WordPress. I hope this helps you get your data out of Docker volumes too!