Bug 2032010

Summary:	[OSP16.2.0] neutron-dhcp-agent causes oom issues on controllers
Product:	Red Hat OpenStack	Reporter:	camorris@redhat.co <camorris>
Component:	openstack-tripleo-heat-templates	Assignee:	Rodolfo Alonso <ralonsoh>
Status:	CLOSED ERRATA	QA Contact:	Candido Campos <ccamposr>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	16.2 (Train)	CC:	astupnik, bdobreli, ccamposr, chrisw, ekuris, mburns, mflusche, ralonsoh, scohen
Target Milestone:	---	Keywords:	Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openstack-tripleo-heat-templates-11.6.1-2.20220104004842.31a431d.el8ost	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-03-23 22:30:16 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description camorris@redhat.co 2021-12-13 21:00:01 UTC

Description of problem:
neutron-dhcp-agent memory usage steadily increases until it consumes all the memory on the controller. The controllers run at about 80G steady state so when we see this the memory consumed by neutron-dhcp-agent is approximately 256G-80G=176G. This issue has happened, and continues to happen, in a rolling manner across all 3 controller servers

Version-Release number of selected component (if applicable):
puppet-neutron-15.6.0-2.20210601015533.7f36270.el8ost.2.noarch Thu Sep  2 09:49:14 2021
python3-neutronclient-6.14.1-2.20210528065959.a09e824.el8ost.1.noarch Thu Sep  2 09:44:23 2021


How reproducible:
Every few days

Steps to Reproduce:
1. Wait a few days
2. Controllers go OOM 
3. Reboot controller
4. Go back to step 1

Actual results:
Controllers go OOM

Expected results:
Controllers not go OOM

Additional info:

Comment 27 errata-xmlrpc 2022-03-23 22:30:16 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 (Moderate: Red Hat OpenStack Platform 16.2 (openstack-tripleo-heat-templates) security 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/RHSA-2022:0995