[gpfsug-discuss] Adding a quorum node

[Wahl, Edward]

I frequently change quorum on the fly on both our 4.x and 5.0 clusters during upgrades/maintenance.

You have sanity in the CCR to start with?  (mmccr query, lsnodes, etc,etc)
Anything useful in the logs or if you drop debug on it?  ('export DEBUG=1'and then re-run command)

Ed Wahl
OSC

-----Original Message-----
From: gpfsug-discuss-bounces at spectrumscale.org <gpfsug-discuss-bounces at spectrumscale.org> On Behalf Of Jonathan Buzzard
Sent: Thursday, December 9, 2021 7:36 AM
To: 'gpfsug-discuss at spectrumscale.org' <gpfsug-discuss at spectrumscale.org>
Subject: [gpfsug-discuss] Adding a quorum node


I am looking to replace the quorum node in our cluster. The RAID card in the server we are currently using is a casualty of the RHEL8 SAS card purge :-(

I have a "new" dual core server that is fully supported by RHEL8. After some toing and throwing with IBM they agreed a Pentium G6400 is 70PVU a core and two cores :-)  That said it is currently running RHEL7 because that's what the DSS-G nodes are running. The upgrade to RHEL8 is planned for next year.

Anyway I have added it into the GPFS cluster all well and good and GPFS is mounted just fine. However when I ran the command to make it a quorum node I got the following error (sanitized to remove actual DNS names and IP addresses

initialize (113, '<fqdn-new>', ('<IP address>', 1191)) failed (err 79) server initialization failed (err 79)
mmchnode: Unexpected error from chnodes -n
1=<fqdn1>:1191,2<fqdn2>:1191,3=<fqdn3>:1191,113=<fqdn-new>:1191 -f 1 -P
1191 .  Return code: 149
mmchnode: Unable to change the CCR quorum node configuration.
mmchnode: Command failed. Examine previous error messages to determine cause.

fqdn-new is the new node and fqdn1/2/3 are the existing quorum nodes. I want to remove fqdn3 in due course.

Anyone any idea what is going on? I thought you could change the quorum nodes on the fly?


JAB.

-- 
Jonathan A. Buzzard                         Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG
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