Generic Docker Makefile
-----------------------

This is a generic make and dockerfile for ceph utility container. This can be used to create docker images using different ceph releases and ubuntu releases

Usage:

make CEPH_RELEASE=<release_name> UBUNTU_RELEASE=<release_name>

eg:

1. Create docker image for ceph luminous release on ubuntu xenial (16.04)

  make CEPH_RELEASE=luminous UBUNTU_RELEASE=xenial

2. Create docker image for ceph mimic release on ubuntu xenial (16.04)

  make CEPH_RELEASE=mimic UBUNTU_RELEASE=xenial

3. Create docker image for ceph luminous release on ubuntu bionic (18.04)

  make CEPH_RELEASE=luminous UBUNTU_RELEASE=bionic

4. Create docker image for ceph mimic release on ubuntu bionic (18.04)

  make CEPH_RELEASE=mimic UBUNTU_RELEASE=bionic