[Bug 1865523] [NEW] [bionic] fence_scsi not working properly with 1.1.18-2ubuntu1.1

[Rafael David Tinoco]

Public bug reported:

Trying to setup a cluster with an iscsi shared disk, using fence_scsi as
the fencing mechanism, I realized that fence_scsi is not working in
Ubuntu Bionic. I first thought it was related to Azure environment (LP:
#1864419), where I was trying this environment, but then, trying
locally, I figured out that somehow pacemaker 1.1.18 is not fencing the
shared scsi disk properly.

Note: I was able to "backport" vanilla 1.1.19 from upstream and
fence_scsi worked. I have then tried 1.1.18 without all quilt patches
and it didnt work as well. I think that bisecting 1.1.18 <-> 1.1.19
might tell us which commit has fixed the behaviour needed by the
fence_scsi agent.

(k)rafaeldtinoco at clubionic01:~$ crm conf show
node 1: clubionic01.private
node 2: clubionic02.private
node 3: clubionic03.private
primitive fence_clubionic stonith:fence_scsi \
        params pcmk_host_list="10.250.3.10 10.250.3.11 10.250.3.12" devices="/dev/sda" \
        meta provides=unfencing
property cib-bootstrap-options: \
        have-watchdog=false \
        dc-version=1.1.18-2b07d5c5a9 \
        cluster-infrastructure=corosync \
        cluster-name=clubionic \
        stonith-enabled=on \
        stonith-action=off \
        no-quorum-policy=stop \
        symmetric-cluster=true

----

(k)rafaeldtinoco at clubionic02:~$ sudo crm_mon -1
Stack: corosync
Current DC: clubionic01.private (version 1.1.18-2b07d5c5a9) - partition with quorum
Last updated: Mon Mar  2 15:55:30 2020
Last change: Mon Mar  2 15:45:33 2020 by root via cibadmin on clubionic01.private

3 nodes configured
1 resource configured

Online: [ clubionic01.private clubionic02.private clubionic03.private ]

Active resources:

 fence_clubionic        (stonith:fence_scsi):   Started
clubionic01.private

----

(k)rafaeldtinoco at clubionic02:~$ sudo sg_persist --in --read-keys --device=/dev/sda
  LIO-ORG   cluster.bionic.   4.0
  Peripheral device type: disk
  PR generation=0x0, there are NO registered reservation keys

(k)rafaeldtinoco at clubionic02:~$ sudo sg_persist -r /dev/sda
  LIO-ORG   cluster.bionic.   4.0
  Peripheral device type: disk
  PR generation=0x0, there is NO reservation held

** Affects: pacemaker (Ubuntu)
     Importance: Medium
     Assignee: Rafael David Tinoco (rafaeldtinoco)
         Status: Confirmed

** Changed in: pacemaker (Ubuntu)
       Status: New => Confirmed

** Changed in: pacemaker (Ubuntu)
   Importance: Undecided => Medium

** Changed in: pacemaker (Ubuntu)
     Assignee: (unassigned) => Rafael David Tinoco (rafaeldtinoco)

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https://bugs.launchpad.net/bugs/1865523

Title:
  [bionic] fence_scsi not working properly with 1.1.18-2ubuntu1.1

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