How can I configure fence devices for my Red Hat Enterprise Linux KVM or Xen guests running in a cluster?

Solution Verified - Updated -


  • The use of Red Hat Hat Enterprise Linux High Availability combined with Red Hat Enterprise Linux Xen or KVM provides the ability to run mission-critical applications in a highly-available virtualized environment.  As with any cluster, running virtual guests in a cluster requires a method for disconnecting one or more of them from shared resources in the event of a failure.  Since virtual guests do not have access to any physical hardware that would typically be used for fencing, an alternate method is required to accomplish this.

Support Notes:

Please see Virtualization Support for High Availability in Red Hat Enterprise Linux 5 and 6 for information on which virtualization configurations are supported in conjunction with Red Hat Enterprise Linux HA Clusters.


  • Red Hat Enterprise Linux 5 Advanced Platform (Clustering and GFS/GFS2)
  • Red Hat Enterprise Linux 6 with the High Availability Add-On or Resilient Storage Add-On
  • Red Hat Enterprise Linux 5 using either Xen or KVM hypervisor as a host, Red Hat Enterprise Linux 6 using KVM hypervisor as a host
  • Red Hat Enterprise Linux 5 or 6 used as a guest

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