I'm having a hard time removing an RBD that I no longer need. # rbd rm <pool>/<name> 2016-08-03 15:00:01.085784 7ff9dfc997c0 -1 librbd: image has watchers - not removing Removing image: 0% complete...failed. rbd: error: image still has watchers This means the image is still open or the client using it crashed. Try again after closing/unmapping it or waiting 30s for the crashed client to timeout. So, I use `rbd status` to identify the watcher: # rbd status <pool>/<name> Watchers: watcher=<some IP>:0/705293879 client.1076985 cookie=1 I log onto that host, and did # rbd showmapped which returns nothing I don't use snapshot and I don't use cloning, so, there shouldn't be any image sharing. I ended up rebooting that host and the watcher is still around, and my problem persist: I can't remove the RBD. At this point, I'm all out of ideas on how to troubleshoot this problem. I'm running infernalis: # ceph --version ceph version 9.2.1 (752b6a3020c3de74e07d2a8b4c5e48dab5a6b6fd) in my set up, on CentOS 7.2 hosts # uname -r 3.10.0-327.22.2.el7.x86_64 I appreciate any assistance, -kc K.C. Wong kcwong@xxxxxxxxxxx 4096R/B8995EDE E527 CBE8 023E 79EA 8BBB 5C77 23A6 92E9 B899 5EDE hkps://hkps.pool.sks-keyservers.net
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