• Storage drivers help manage storage on images and containers.
  • If want to persist storage, need to create volumes.
    • Volumes are not handled by storage drivers.
    • Volumes are handled by Volume Driver plugins.
    • Default plugin is Local
      • Helps create a volume on the docker host.
        • Stores data under /var/lib/docker/volumes directory.
    • Other volume drivers include:
      • Azure File Storage, Convoy, DigitalOcean Block Storage, Flocker, gce-docker, GlusterFS, NetApp, RexRay, Portworx, VMware vSphere Storage
  • RexRay storage driver can help to provision on AWS EBS, S3, EMC storage arrays (Isilon and ScaleIO), Google Persistent Disk or OpenStack Cinder,
  • When running a docker container, can choose a specific volume driver as in the below example: 
    docker run -it --name mysql --volume-driver rexray/ebs --mount src=ebs-vol,target=/var/lib/mysql mysql
  • The above provisions a volume from Amazon EBS.
  • When the container exists, the data is still safe in the cloud.

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