记录ceph两个rbd删除不了的处理过程

在一个使用的环境发现两个ceph的rbd删除不了，发现两个rbd都是由于残留了watch的信息。在此记录处理过程。

处理方法

[root@node- ~]# rbd rm compute/2d05517a--4cce-b39d-709e055381d6_disk
-- ::14.787750 7fd05853bd80 - librbd: cannot obtain exclusive lock - 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.

查看rbd 残留的watch信息

[root@node- ~]# rbd status compute/2d05517a--4cce-b39d-709e055381d6_disk
Watchers:
    watcher=192.168.55.2:0/2900899764 client. cookie=

将该残留的watch信息添加到osd的黑名单，再查看watch是否存在。

[root@node- ~]# ceph osd blacklist add 192.168.55.2:/
blacklisting 192.168.55.2:/ until -- ::31.027420 ( sec)
[root@node- ~]# rbd status compute/2d05517a--4cce-b39d-709e055381d6_disk
Watchers: none

删除rbd

[root@node- ~]# rbd rm compute/2d05517a--4cce-b39d-709e055381d6_disk
Removing image: % complete...done.