Comment 2 for bug 1639269

Denis K.,

If you are only interested in logs and not in API, then this info is already available in nova-compute logs:

ubuntu@rpodolyaka-devstack:~/devstack$ grep 4577d61a-1855-4ee6-8590-272d699bc0f5 /opt/stack/logs/n-cpu.log | grep INFO
2016-11-07 13:21:53.419 21629 INFO nova.compute.manager [req-60864d1c-c425-45cc-9a6b-7c79fc8cc69b demo demo] [instance: 91bf6b05-266e-4923-8f4b-0873e147d662] Attaching volume 4577d61a-1855-4ee6-8590-272d699bc0f5 to /dev/vdb
2016-11-07 13:23:51.106 21629 INFO nova.compute.manager [req-090ad538-7841-4dfb-8449-f99c055c9d14 demo demo] [instance: 91bf6b05-266e-4923-8f4b-0873e147d662] Detach volume 4577d61a-1855-4ee6-8590-272d699bc0f5 from mountpoint /dev/vdb