[ClusterLabs] [EXT] DRBD 2-node M/S doesn't want to promote new master, Centos 8

[Brent Jensen]

Maybe. I haven't focused on any stickiness w/ which node is generally 
master or not. Going standby on the master node should move the slave to 
master. I'm just trying to follow what's been tried and true in the past 
and it's no longer following what I would expect. About the only change 
is the way pacemaker is setup (pacemaker ver 1 uses a master resource, 
whereas ver 2 uses a promotable resource. I'm not 100% sure I'm doing it 
right because I haven't gotten it working.

Working DRBD resource (pacemaker 1):
  Master: ms_drbd0
   Meta Attrs: clone-max=2 clone-node-max=1 master-max=1 
master-node-max=1 notify=true target-role=Started
   Resource: drbd0 (class=ocf provider=linbit type=drbd)
    Attributes: drbd_resource=r0
    Operations: demote interval=0s timeout=90 (drbd0-demote-interval-0s)
                monitor interval=15 role=Master (drbd0-monitor-interval-15)
                monitor interval=30 role=Slave (drbd0-monitor-interval-30)
                notify interval=0s timeout=90 (drbd0-notify-interval-0s)
                promote interval=0s timeout=90 (drbd0-promote-interval-0s)
                reload interval=0s timeout=30 (drbd0-reload-interval-0s)
                start interval=0 timeout=240s (drbd0-start-interval-0)
                stop interval=0 timeout=100s (drbd0-stop-interval-0)


This resource (pacemaker 2):
  Clone: drbd0-clone
   Meta Attrs: clone-max=2 clone-node-max=1 notify=true promotable=true 
promoted-max=1 promoted-node-max=1 target-role=Started
   Resource: drbd0 (class=ocf provider=linbit type=drbd)
    Attributes: drbd_resource=r0
    Operations: demote interval=0s timeout=90 (drbd0-demote-interval-0s)
                monitor interval=20 role=Slave timeout=20 
(drbd0-monitor-interval-20)
                monitor interval=10 role=Master timeout=20 
(drbd0-monitor-interval-10)
                notify interval=0s timeout=90 (drbd0-notify-interval-0s)
                promote interval=0s timeout=90 (drbd0-promote-interval-0s)
                reload interval=0s timeout=30 (drbd0-reload-interval-0s)
                start interval=0s timeout=240 (drbd0-start-interval-0s)
                stop interval=0s timeout=100 (drbd0-stop-interval-0s)

On 1/15/2021 5:16 PM, Ulrich Windl wrote:
> On 1/15/21 10:10 PM, Brent Jensen wrote:
>> pacemaker-attrd[7671]: notice: Setting master-drbd0[nfs5]: 10000 -> 1000
>
> I wonder: Does that mean the stickiness for master is still 1000 on nfs5?
>
>
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