SCSI Persistent Reservation fencing (fence_scsi) does not work in RHEL 5 or 6 with multiple ESXi VM cluster nodes running on the same host

Solution Unverified - Updated -

Issue

  • Does fence_scsi work with cluster nodes as guests on the same ESXi host?
  • I need to configure a fence device for ESXi VM cluster nodes. fence_scsi works from command line but not from cman
Dec 11 08:06:41 fence_scsi: [debug] main::do_register_ignore (node_key=1, dev=/dev/sda)
Dec 11 08:06:41 fence_scsi: [debug] main::do_reset (dev=/dev/sda, status=0)
Dec 11 08:06:41 fence_scsi: [error] failed to create registration (key=1, device=/dev/disk/by-id/scsi-36000144000000010203d72672bc76763)
Dec 11 08:06:41 fence_scsi: [debug] main::do_register_ignore (err=5)
  • SCSI reservation conflicts when both VM nodes running on same host

Environment

  • Red Hat Enterprise Linux (RHEL) 5 with the High Availability Add On
  • Red Hat Enterprise Linux (RHEL) 6 with the High Availability Add On
  • SCSI Persistent Reservation Fencing (fence_scsi)
  • Multiple VMWare ESXi VMs running on the same physical host operating in a cluster together

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