Hey all,
I recently had a k8s node failure in my homelab, and even though I powered it
off (and it's done for, so it won't get back up), it still shows up as watcher
in rbd status.
```
root@node0:~# rbd status kubernetes/csi-vol-3e7af8ae-ceb6-4c94-8435-2f8dc29b313b
Watchers:
watcher=10.0.0.103:0/1520114202 client.1697844 cookie=140289402510784
watcher=10.0.0.103:0/39967552 client.1805496 cookie=140549449430704
root@node0:~# ceph osd blocklist ls
10.0.0.103:0/0 2023-04-15T13:15:39.061379+0200
listed 1 entries
```
Even though the node is down & I have blocked it multiple times for hours, it
won't disappear. Meaning, ceph-csi-rbd claims the image is mounted already
(manually binding works fine, and can cleanly unbind as well, but can't unbind
from a node that doesn't exist anymore).
Is there any possibility to force kick an rbd client / watcher from ceph (e.g.
switching the mgr / mon) or to see why this is not timing out?
I found some historical mails & issues (related to rook, which I don't use)
regarding a param `osd_client_watch_timeout` but can't find how that relates to
the RBD images.
Cheers,
Max.
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