Dom0 Stonith Helper for Virtual HA2 clusters
STONITH: New externel/xen0-ha plugin to handle virtualized clusters.
author Lars Marowsky-Bree <email@example.com>
# Instead of calling out to a physical STONITH device, the DomU cluster instead instructs the Dom0 cluster that it wants a specific node restarted or turned off.
# The Dom0 cluster knows - at all times, even with migration - on which physical node the DomU is currently hosted, and can comply with this request.
# Further, through this integration, Dom0 is made aware of the DomU intents, and its own monitoring and recovery strategy can take this into account.
# In case there is a DomU stop failure (due to a crashed hypervisor), split-brain or physical node failure, the Dom0 cluster can properly interact with the physical STONITH devices to faciliate recovery.
If you use the Dom0 cluster to stop and start DomUs, the DomU nodes will cleanly sign-out of the DomU cluster and not trigger a fencing operation.