Wido den Hollander created CLOUDSTACK-8628:
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Summary: Ceph RBD only cluster with KVM does not fence properly
Key: CLOUDSTACK-8628
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8628
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
When a NFS storage pool is present on a KVM cluster that pool is used for
writing heartbeats to.
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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