Pmond seen to leave stuck 200.006 process failure alarm if clear attempt fails

Bug #1892884 reported by Eric MacDonald
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
StarlingX
Fix Released
Low
Eric MacDonald

Bug Description

The Maintenance Process Monitor (pmond) tries to clear any existing process failure alarms on process startup.

If the system Fault Manager (FM) is not running when the Process Monitor starts up and tries to query/clear existing alarms and gets a failure to do so then any existing 200.006 process failure alarms that exists remain stuck asserted until same process fails and recovers or the pmond process itself restarts again while FM is running.

Severity: Minor

Impact: Stuck alarm has no service impact and can be manually deleted or auto corrected by locking and unlocking the host.

Steps to Reproduce
------------------

   Kill pmond monitored process and allow alarm to get asserted
   Kill FM and prevent it from restarting.
   Kill pmond and allow failed monitored process to recover while FM is down
   pmond is unable to clear alarm so it gets stuck.

Expected Behavior: Alarm should be cleared
Actual Behavior: Alarm is stuck asserted

Reproducibility: 100% with the described (above) conditions met.

System Configuration: Any

Branch/Pull Time/Commit: Aug 25, 2020

Last Pass: Never seen. Test Escape

Timestamp/Logs: Issue understood. No logs required

Test Activity: Robustness testing

Workaround: Manually delete alarm or lock/unlock host

Revision history for this message
Ghada Khalil (gkhalil) wrote :

stx.5.0 / low priority - stuck alarm; minor impact and workaround exists.

tags: added: stx.5.0 stx.metal
Changed in starlingx:
importance: Undecided → Medium
status: New → Triaged
assignee: nobody → Eric MacDonald (rocksolidmtce)
importance: Medium → Low
Revision history for this message
Eric MacDonald (rocksolidmtce) wrote :

This issue has been fixed by

update: Add alarmed process audit to Process Monitor
review: https://review.opendev.org/c/starlingx/metal/+/777440
commit: https://opendev.org/starlingx/metal/commit/6cf5e848256c7612e2d5dc3c0a86ac7b76684b6e

Changed in starlingx:
status: Triaged → Fix Released
Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix proposed to metal (f/centos8)

Fix proposed to branch: f/centos8
Review: https://review.opendev.org/c/starlingx/metal/+/792250

Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix merged to metal (f/centos8)
Download full text (34.9 KiB)

Reviewed: https://review.opendev.org/c/starlingx/metal/+/792250
Committed: https://opendev.org/starlingx/metal/commit/6c2905e665ceeebfa7717c9cbccc1c277d10966b
Submitter: "Zuul (22348)"
Branch: f/centos8

commit 5942a56ec6f0b265ca6d1c8c800fe84c4a22860f
Author: Eric MacDonald <email address hidden>
Date: Thu May 13 15:57:43 2021 +0000

    Revert "Align partitions created by kickstarters"

    This reverts commit 0e89acc83c616741952a068a3ff07ba91440eff8.

    Reason for revert: Review should have been abandoned rather than merged.

    Change-Id: I95f1e151183f122d93b834ab2a785736e5a8ef12
    Closes-Bug: 1928341

commit c7c341b198e79bb98f443c7c07f671c6387075af
Author: Don Penney <email address hidden>
Date: Fri May 7 08:56:06 2021 -0400

    Add /pxeboot/grubx64.efi symlink for UEFI pxeboot

    UEFI pxeboot with shim.efi looks for the grubx64.efi in the tftpboot
    root directory. This update creates a symlink to the
    /pxeboot/EFI/grubx64.efi file in /pxeboot.

    Change-Id: Iabf8ec89d0af6e6b1a62e20159ecdfa16729444e
    Partial-Bug: 1927730
    Signed-off-by: Don Penney <email address hidden>

commit ce7529964932a9fd1cc10ce18dbe11e89ee02223
Author: Eric MacDonald <email address hidden>
Date: Wed May 5 19:05:55 2021 -0400

    Fix enabling heartbeat of self from the peer controller

    This issue only occurs over an hbsAgent process restart
    where the ready event response does not include the
    heartbeat start of the peer controller.

    This update reverts a small code change that was
    introduced by the following update.

    https://review.opendev.org/c/starlingx/metal/+/788495

    Remove the my_hostname gate introduced at line 1267 of
    mtcCtrlMsg.cpp because it prevents enabling heartbeat
    of self by the peer controller.

    Change-Id: Id72c35f25e2a5231a8a8363a35a81e042f00085e
    Closes-Bug: 1922584
    Signed-off-by: Eric MacDonald <email address hidden>

commit 48978d804d6f22130d0bd8bd17f361441024bc6c
Author: Eric MacDonald <email address hidden>
Date: Wed Apr 28 09:39:19 2021 -0400

    Improved maintenance handling of spontaneous active controller reboot

    Performing a forced reboot of the active controller sometimes
    results in a second reboot of that controller. The cause of the
    second reboot was due to its reported uptime in the first mtcAlive
    message, following the reboot, as greater than 10 minutes.

    Maintenance has a long standing graceful recovery threshold of
    10 minutes. Meaning that if a host looses heartbeat and enters
    Graceful Recovery, if the uptime value extracted from the first
    mtcAlive message following the recovery of that host exceeds 10
    minutes, then maintenance interprets that the host did not reboot.
    If a host goes absent for longer than this threshold then for
    reasons not limited to security, maintenance declares the host
    as 'failed' and force re-enables it through a reboot.

    With the introduction of containers and addition of new features
    over the last few releases, boot times on some servers are
    approaching the 10 minute threshold an...

tags: added: in-f-centos8
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