title: “Persistent Storage”
date: 2016-03-27T15:41:45
slug: persistent-storage

Attach a Host Directory to the Container

Create a volume container:

docker create -v /dbdata --name dbstore ubuntu /bin/true

Start a container with the volume container attached

docker run -d --volumes-from dbstore --name ubuntu ubuntu

Start a second container with the same volume container (shared)

docker run -d --volumes-from dbstore --name ubuntu2 ubuntu

You can use multiple --volumes-from parameters

Make a backup from the volume

docker run --rm --volumes-from ubuntu -v $(pwd):/backup ubuntu tar cvf /backup/backup.tar /dbdata

Restore the backup into a container

1. Create a container with /dbdata as a storage point

docker run -v /dbdata --name dbstore2 ubuntu /bin/bash

1. Mount the /dbdata Storage point to a new container, mount the local directory to /backup into the container (this includes backup.tar.gz)  and extarct it in /dbdata

docker run --rm --volumes-from dbstore2 -v $(pwd):/backup ubuntu bash -c "cd /dbdata && tar xvf /backup/backup.tar --strip 1"