=============================================
Use logical volumes instead of loopback files
=============================================

------------------------
Set up the Logical Disks
------------------------

::

  $ sudo lvcreate --wipesignatures y -L 200G -n lv_docker_data vg
  $ sudo lvcreate --wipesignatures y -L 10G -n lv_docker_metadata vg

---------------------
Rewrite configuration
---------------------

::

  $ sudo cp -p /etc/sysconfig/docker-storage /etc/sysconfig/docker-storage.original
  $ echo "DOCKER_STORAGE_OPTIONS = \
      --storage-opt dm.datadev=/dev/mapper/vg-lv_docker_data \
      --storage-opt dm.metadatadev=/dev/mapper/vg-lv_docker_metadata \
      --storage-opt dm.fs=xfs" | sudo tee /etc/sysconfig/docker-storage

----------------
Apply the change
----------------

::

  $ sudo systemctl restart docker