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From "ASF subversion and git services (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-8628) Ceph RBD only cluster with KVM does not fence properly
Date Fri, 17 Jul 2015 10:34:05 GMT


ASF subversion and git services commented on CLOUDSTACK-8628:

Commit fbe3b04a43ff7380a6874a2c331f372aa59ccf3d in cloudstack's branch refs/heads/master from
[;h=fbe3b04 ]

CLOUDSTACK-8628: Send an alert when fencing a KVM host failed

Also change the logging a bit so that you get useful logs when
not running on DEBUG level

Signed-off-by: Wido den Hollander <>

This closes #580

> Ceph RBD only cluster with KVM does not fence properly
> ------------------------------------------------------
>                 Key: CLOUDSTACK-8628
>                 URL:
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Wido den Hollander
>            Assignee: Wido den Hollander
>             Fix For: Future, 4.6.0
> When a NFS storage pool is present on a KVM cluster that pool is used for writing heartbeats
> In case of a Ceph (RBD) only cluster such pools are not available and thus the KVM hosts
do not write any heartbeats.
> Should the KVM Agent crash for any reason they will be fenced of directly and this will
cause a split-brain situation.
> Fencing should not happen when no NFS storage pool is present as it is dangerous for
data consistency. A Instance could be running on two hosts at the same time.

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