When using fence_scsi with multipath devices and specifying a "devices" attribute in RHEL, reservation conflicts are logged
Issue
- During some cluster test we have seen some entries in the log file that need our attention:
Feb 11 19:43:48 node2 kernel: sd 2:0:2:6: [sdh] Result: hostbyte=DID_OK driverbyte=DRIVER_OK
Feb 11 19:43:48 node2 kernel: sd 2:0:2:6: [sdh] CDB: Write(10): 2a 00 42 87 08 00 00 04 00 00
Feb 11 19:43:48 node2 kernel: sd 2:0:2:6: reservation conflict
Feb 11 19:43:48 node2 kernel: end_request: critical nexus error, dev sdh, sector 1116147712
- We have configured the
fence_scsito be used as fencing device for this multipathed device but we get reservation conflicts:
<fencedevice agent="fence_scsi" name="scsi_node1" devices="/dev/disk/by-id/scsi-3600c0ff00013e0bef982e94f01000000"/>
<fencedevice agent="fence_scsi" name="scsi_node2" devices="/dev/disk/by-id/scsi-3600c0ff00013e0bef982e94f01000000"/>
Environment
- Red Hat Enterprise Linux Server 6, 7, 8, 9 (with the High Availability Add On)
fence_scsi- The shared storage uses device mapper multipath (dmm)
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