Public bug reported:
When using TGT to serve iSCSI targets/luns to a corosync/pacemaker
cluster, if one wants to use "fence_scsi" to fence the shared disk for a
particular node it won't be able to as tgt does not implement the
PREEMPT AND ABORT (05h) service.
A error like this will occur:
$ sudo fence_scsi --verbose -n clufocal03 --action=off -d /dev/disk/by-
path/ip-10.250.1.199\:3260-iscsi-
iqn.2020-01.cluster.focal\:target01-lun-1
...
2020-02-17 20:08:40,470 DEBUG: 5 PR out (Preempt and abort): bad field in cdb
or parameter list (perhaps unsupported service action)
sg_persist failed: Illegal request
...
This is particularly bad as pacemaker configured with fence_scsi will
fail to fence the other node with abstract error message.
** Affects: fence-agents (Ubuntu)
Importance: Wishlist
Status: Confirmed
** Affects: tgt (Ubuntu)
Importance: Wishlist
Status: Confirmed
** Changed in: tgt (Ubuntu)
Importance: Undecided => Wishlist
** Changed in: tgt (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1863688
Title:
tgt should support Persistent Reserve Out (5Fh) PREEMPT AND ABORT
(05h) service
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