protocol: { "driver": "rbd", "location": { "pool": "asdf", "image": "i.qcow2", "server": [ { "host": "example.com", "port": "1234" }, { "host": "alternate.example.com", "port": "4321" } ] }, "size": 4294967296 } format: { "driver": "qcow2", "file": "0123456789ABCDEF0123456789ABCDE", "size": 8589934590 }