테스트환경
OpenStack : Mitaka
Ceph : 10.2.2
Ceph OS : Ubuntu 16.04 LTS
ComputeNode OS : Ubuntu 14.04 LTS

# tail -f /var/log/nova-compute.log
2016-08-30 11:03:04.088 24328 ERROR nova.compute.manager [instance: e36a7c21-2740-4d93-ba8f-3b681e62c35d] libvirtError: internal error: early end of file from monitor, possible problem: 2016-08-30T02:03:04.051513Z qemu-system-x86_64: -drive file=rbd:vms/e36a7c21-2740-4d93-ba8f-3b681e62c35d_disk:id=cinder:key=AQA5bJVXRLKSNhAAdYeqVWO/mSVvreiWkC4y0A==:auth_supported=cephx\;none:mon_host=172.16.8.59\:6789\;172.16.8.60\:6789\;172.16.8.61\:6789,format=raw,if=none,id=drive-virtio-disk0,cache=none: error connecting
2016-08-30 11:03:04.088 24328 ERROR nova.compute.manager [instance: e36a7c21-2740-4d93-ba8f-3b681e62c35d]
2016-08-30 11:03:04.097 24328 INFO nova.compute.manager [req-32ffc3c6-a778-4786-80b9-12b3ace4b676 b03804ea1653457fafcfad34fcc28212 54ce8cc61ed54db6ba0666ab1148c4ba - - -] [instance: e36a7c21-2740-4d93-ba8f-3b681e62c35d] Terminating instance

===>> 해결
ComputeNode OS : Ubuntu 16.04 LTS 변경