Hi Ulrich,
Thank you. I am perfectly aware that operating without stonith is not a
good idea :). I am sure I will add it. But first I need to understand
the current state. I am afraid of introducing something new before I fix
the current problem.
Best regards,
Piotr
On 13.07.2022 08:00, Ulrich Windl wrote:
Piotr Szafarczyk schrieb am 12.07.2022 um 12:34 in
Nachricht <38ccc24a-7b01-561c-20f8-ec2273a18...@netexpert.pl>:
Hi,
I used to have a working cluster with 3 nodes (and stonith disabled).
THE SLES guide says:
Important: No Support Without STONITH
You must have a node fencing mechanism for your cluster.
The global cluster options stonith-enabled and startup-fencing must be
set to true . When you change them, you lose support.
Maybe that helps.
After an unexpected restart of one node, the cluster split. The node #2
started to see the others as unclean. Nodes 1 and 2 were cooperating
with each other, showing #2 as offline. There were no network connection
problems.
I removed #2 (operating from #1) with
pcs cluster node remove n2
I verified that it had removed all configuration from #2, both for
corosync and for pacemaker. The cluster looks like working correctly
with two nodes (and no traces of #2).
Now I am trying to add the third node back.
pcs cluster node add n2
Disabling SBD service...
n2: sbd disabled
Sending 'corosync authkey', 'pacemaker authkey' to 'n2'
n2: successful distribution of the file 'corosync authkey'
n2: successful distribution of the file 'pacemaker authkey'
Sending updated corosync.conf to nodes...
n3: Succeeded
n2: Succeeded
n1: Succeeded
n3: Corosync configuration reloaded
I am able to start #2 operating from #1
pcs cluster pcsd-status
n2: Online
n3: Online
n1: Online
pcs cluster enable n2
pcs cluster start n2
I can see that corosync's configuration has been updated, but
pacemaker's not.
_Checking from #1:_
pcs config
Cluster Name: n
Corosync Nodes:
n1 n3 n2
Pacemaker Nodes:
n1 n3
[...]
pcs status
* 2 nodes configured
Node List:
* Online: [ n1 n3 ]
[...]
pcs cluster cib scope=nodes
_#2 is seeing the state differently:_
pcs config
Cluster Name: n
Corosync Nodes:
n1 n3 n2
Pacemaker Nodes:
n1 n2 n3
pcs status
* 3 nodes configured
Node List:
* Online: [ n2 ]
* OFFLINE: [ n1 n3 ]
Full List of Resources:
* No resources
[...]
(there are resources configured on #1 and #3)
pcs cluster cib scope=nodes
Help me diagnose it please. Where should I look for the problem? (I have
already tried a few things more - I see nothing helpful in log files,
pcs --debug shows nothing suspicious, tried even editing the CIB manually)
Best regards,
Piotr Szafarczyk
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