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Bug 1677616

Summary:	openvswitch using 100% cpu on OVN deployment, delay on security groups being applied
Product:	Red Hat OpenStack	Reporter:	Eduard Barrera <ebarrera>
Component:	openvswitch	Assignee:	Numan Siddique <nusiddiq>
Status:	CLOSED ERRATA	QA Contact:	Roman Safronov <rsafrono>
Severity:	high	Docs Contact:
Priority:	urgent
Version:	13.0 (Queens)	CC:	apevec, bcafarel, chrisw, dalvarez, dmaley, ebarrera, ekuris, lmartins, madgupta, nate.johnston, nusiddiq, ojanas, pmorey, rhos-maint, rkhan, shdunne
Target Milestone:	---	Keywords:	Triaged, ZStream
Target Release:	13.0 (Queens)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openvswitch-2.9.0-103.el7fdp	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-04-30 17:23:45 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:

Comment 2 Daniel Alvarez Sanchez 2019-02-15 11:38:54 UTC

Thanks Eduard.

All the neutron ports belong to the same security group(s)? Can you paste the output of "openstack security group show <sgid>" for each sgid which the VMs belong to?
I think this is related to:

https://bugzilla.redhat.com/show_bug.cgi?id=1622469

Comment 46 Roman Safronov 2019-04-15 16:14:41 UTC

Verified on 13.0-RHEL-7/2019-04-10.1 with openvswitch-2.9.0-103.el7fdp.x86_64

Scenario:
Created 5 tenants. For each tenant created a router each with 2 internal networks. 
Created a security group for each tenant. Each security group with maximal number of rules (100)
Connected VMs to each network.
On 2 VMs executed a script got from Numan (https://paste.fedoraproject.org/paste/3iuxYe9TLqPBNJ6u0sHyTw) that sends multiple dhcp packets.
Verified that ovn-controller is able to handle these multiple dhcp requests from VMs without any delay. CPU load was not high (15-20%). Verified that it is possible to run new instances when ovn-controller is under load. No issues with applying security groups observed.

Comment 50 errata-xmlrpc 2019-04-30 17:23:45 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, 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-2019:0926