protocol: { "driver": "sheepdog", "location": { "server": { "type": "inet", "host": "example.com", "port": "1234" }, "vdi": "asdf/i.qcow2" }, "size": 4294967296 } format: { "driver": "qcow2", "file": "0123456789ABCDEF0123456789ABCDE", "size": 8589934590 }