Bug 2180460

Summary: ovs-vswitchd not creating DP flows
Product: Red Hat Enterprise Linux Fast Datapath Reporter: Patryk Diak <pdiak>
Component: openvswitch3.1Assignee: Adrián Moreno <amorenoz>
Status: CLOSED ERRATA QA Contact: ovs-qe
Severity: unspecified Docs Contact:
Priority: high    
Version: RHEL 9.0CC: ctrautma, fleitner, i.maximets, jhsiao, ralongi, tredaelli
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: openvswitch3.1-3.1.0-12.el8fdp Doc Type: If docs needed, set a value
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Story Points: ---
Clone Of:
: 2204523 (view as bug list) Environment:
Last Closed: 2023-07-06 20:05:16 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:
Bug Depends On:    
Bug Blocks: 2204523    
Attachments:
Description Flags
ovs-vswitchd journal at dbg lvl none

Description Patryk Diak 2023-03-21 14:26:34 UTC 
Created attachment 1952418 [details]
ovs-vswitchd journal at dbg lvl

OVN-Kubernetes issue: https://issues.redhat.com/browse/OCPBUGS-10485

Description of problem:
During OCP node startup network setup fails because DHCP packets are not leaving the node. 

It looks like there are no DP flows programmed:
ovs-appctl dpctl/show
system@ovs-system:
  lookups: hit:0 missed:620282 lost:620282
  flows: 0
  masks: hit:0 total:0 hit/pkt:0.00
  caches:
    masks-cache: size:256
  port 0: ovs-system (internal)
  port 1: ens4
  port 2: ovn-k8s-mp0 (internal)
  port 3: genev_sys_6081 (geneve: packet_type=ptap)
  port 4: br-int (internal)
  port 5: br-ex (internal)

ovs-ofctl dump-flows br-ex
 cookie=0x0, duration=171.388s, table=0, n_packets=5, n_bytes=210, priority=0 actions=NORMAL

ovs-appctl dpctl/dump-flows
<NO_OUTPUT>


Version-Release number of selected component (if applicable):
ovs_version: "3.1.1"
OCP version: 4.13.0-0.nightly-2023-03-14-053612

How reproducible: Often, but only when using nodes with two cores


Steps to Reproduce:
Setup OCP 4.13.0-0.nightly-2023-03-14-053612 using workers that have 2 CPU cores each

Actual results:
ovs-configuration.service fails to setup br-ex, DHCP traffic not leaving the node

Expected results:
network setup succedes

Additional info:
Looking at the attached ovs-vswitchd it looks like there are initially 0 n-handler-threads configured
Comment 8 Christian Trautman 2023-06-07 21:03:42 UTC 
Based on the verification in https://issues.redhat.com/browse/OCPBUGS-10485 we are marking this as verified.
Comment 12 errata-xmlrpc 2023-07-06 20:05:16 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 (openvswitch3.1 bug fix and enhancement 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-2023:3994