How do I configure my highly available cluster to enable access to storage devices managed by fence agents in RHEL 6 or 7?

Solution In Progress - Updated -

Issue

  • Which fence agents should include an <unfence> section in their /etc/cluster/cluster.conf on RHEL 6?
  • Nodes are not being "unfenced" by fence_scsi when they join a pacemaker cluster
  • Do I need to configure something special so that the cluster enables access to the shared storage devices managed by my fence devices when a node joins?
  • What storage fencing options are available?

Environment

  • Red Hat Enterprise Linux (RHEL) 6 or 7 with the High Availability Add On
  • cman clusters with or without pacemaker
  • A fence agent in use by one or more cluster nodes which controls access to a resource, such as storage, that must be enabled when a node joins the cluster. Agents provided by Red Hat that require such functionality are:

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