Bug 2130118

Summary: standby-replay mds is removed from MDSMap unexpectedly
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Venky Shankar <vshankar>
Component: CephFSAssignee: Venky Shankar <vshankar>
Status: CLOSED ERRATA QA Contact: Hemanth Kumar <hyelloji>
Severity: high Docs Contact: Eliska <ekristov>
Priority: unspecified    
Version: 5.2CC: ceph-eng-bugs, cephqe-warriors, ekristov, hyelloji, pasik, vereddy
Target Milestone: ---   
Target Release: 6.0   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: ceph-17.2.3-43.el9cp Doc Type: Bug Fix
Doc Text:
.The standby-replay Metadata Server daemon is no longer unexpectedly removed Previously, the Ceph Monitor would remove a standby-replay Metadata Server (MDS) daemon from the MDS map under certain conditions. This would cause the standby-replay MDS daemon to get removed from the Metadata Server cluster, which generated cluster warnings. With this fix, the logic used in Ceph Monitors during the consideration of removal of an MDS daemon from the MDS map now includes information about the standby-replay MDS daemons holding a rank. As a consequence, the standby-replay MDS daemons are no longer unexpectedly removed from the MDS cluster.
 Story Points: ---
Clone Of: 2130116 Environment:
Last Closed: 2023-03-20 18:58:17 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2126050, 2130116    

Description Venky Shankar 2022-09-27 09:07:53 UTC 
+++ This bug was initially created as a clone of Bug #2130116 +++

Description of problem:

standby-replay mds is removed from MDSMap unexpectedly.

Change https://github.com/ceph/ceph/commit/20509bb6c82e872127ab838d45402be0d0b91b5f evicts MDSs when a garbage beacon or an invalid state transition is seen by the monitor. To reproduce this, the standby-replay daemon needs to be laggy and then when it resumes back to normal operation, the monitor would remove the standby-replay MDS.

--- Additional comment from RHEL Program Management on 2022-09-27 09:05:58 UTC ---

Please specify the severity of this bug. Severity is defined here:
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity.
Comment 1 RHEL Program Management 2022-09-27 09:08:07 UTC 
Please specify the severity of this bug. Severity is defined here:
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity.
Comment 16 errata-xmlrpc 2023-03-20 18:58:17 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Red Hat Ceph Storage 6.0 Bug Fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:1360