[ClusterLabs] Unexpected resource restart

Valentin Vidic Valentin.Vidic at CARNet.hr
Wed Jan 16 11:28:59 UTC 2019


Hi all,

I'm testing the following configuration with two nodes:

 Clone: storage-clone
  Meta Attrs: interleave=true target-role=Started
  Group: storage
   Resource: dlm (class=ocf provider=pacemaker type=controld)
   Resource: lockd (class=ocf provider=heartbeat type=lvmlockd)

 Clone: gfs2-clone
  Group: gfs2
   Resource: gfs2-lvm (class=ocf provider=heartbeat type=LVM-activate)
    Attributes: activation_mode=shared vg_access_mode=lvmlockd vgname=vgshared lvname=gfs2
   Resource: gfs2-fs (class=ocf provider=heartbeat type=Filesystem)
    Attributes: directory=/srv/gfs2 fstype=gfs2 device=/dev/vgshared/gfs2

 Clone: ocfs2-clone
  Group: ocfs2
   Resource: ocfs2-lvm (class=ocf provider=heartbeat type=LVM-activate)
    Attributes: activation_mode=shared vg_access_mode=lvmlockd vgname=vgshared lvname=ocfs2
   Resource: ocfs2-fs (class=ocf provider=heartbeat type=Filesystem)
    Attributes: directory=/srv/ocfs2 fstype=ocfs2 device=/dev/vgshared/ocfs2

Ordering Constraints:
  storage-clone then gfs2-clone (kind:Mandatory) (id:gfs2_after_storage)
  storage-clone then ocfs2-clone (kind:Mandatory) (id:ocfs2_after_storage)
Colocation Constraints:
  gfs2-clone with storage-clone (score:INFINITY) (id:gfs2_with_storage)
  ocfs2-clone with storage-clone (score:INFINITY) (id:ocfs2_with_storage)

When node2 is set to standby resource stop running there.  However when
node2 is brought back online, it causes the resources on node1 to stop
and than start again which is a bit unexpected?

Maybe the dependency between the common storage group and the upper
gfs2/ocfs2 groups could be written in some other way to prevent this
resource restart?

-- 
Valentin


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