Bug 1761573

Summary:	[RHEL 7] ovsdb-server doesn't apply the db server status change to all the json rpc sessions few times.
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	Numan Siddique <nusiddiq>
Component:	openvswitch2.12	Assignee:	Open vSwitch development team <ovs-team>
Status:	CLOSED ERRATA	QA Contact:	haidong li <haili>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	FDP 19.G	CC:	ctrautma, jhsiao, jiji, jishi, kfida, ovs-qe, qding, ralongi
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1761572
Clones:	1761575 (view as bug list)		Environment:
Last Closed:	2019-12-11 12:14:59 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:	1761572, 1761577
Bug Blocks:	1761575

Description Numan Siddique 2019-10-14 18:41:41 UTC

+++ This bug was initially created as a clone of Bug #1761572 +++

Description of problem:
In an OVN deployment when ovsdb-server failover happens, it can happen that some ovn-controllers connect to the ovsdb-server master in read-only mode. Once the ovsdb-servers are promoted to master, ideally ovn-controller should reconnect again and have read-write access to the db. But some times, the connection is not reset and these ovn-controller remain connected to the ovsdb-servers' in read-only mode. Because of which they cannot write to the SB db. This causes VM boot failures and mac_binding write failures.


Version-Release number of selected component (if applicable):


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Comment 2 haidong li 2019-11-05 06:45:41 UTC

[root@dell-per730-42 ovn]# uname -a
Linux dell-per730-42.rhts.eng.pek2.redhat.com 3.10.0-1101.el7.x86_64 #1 SMP Sat Oct 5 04:50:26 EDT 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@dell-per730-42 ovn]#
[root@dell-per730-42 ~]# rpm -qa | grep openvswitch
kernel-kernel-networking-openvswitch-ovs_qinq-1.3-34.noarch
openvswitch-selinux-extra-policy-1.0-14.el7fdp.noarch
openvswitch2.12-2.12.0-3.el7fdp.x86_64
[root@dell-per730-42 ~]# rpm -qa | grep ovn
ovn2.12-host-2.12.0-3.el7fdp.x86_64
ovn2.12-central-2.12.0-3.el7fdp.x86_64
ovn2.12-2.12.0-3.el7fdp.x86_64
[root@dell-per730-42 ~]#
[root@dell-per730-42 ~]# ovn-nbctl --detach
/var/run/openvswitch/ovn-nbctl.43870.ctl
[root@dell-per730-42 ~]# NB_PATH=/var/run/openvswitch/ovn-nbctl.43870.ctl
[root@dell-per730-42 ~]# ovs-appctl -t $NB_PATH run ls-add test
[root@dell-per730-42 ovn]# ovs-appctl -t /var/run/ovn/ovnnb_db.ctl ovsdb-server/set-active-ovsdb-server tcp:192.0.2.254:6641
[root@dell-per730-42 ovn]# ovs-appctl -t /var/run/ovn/ovnnb_db.ctl ovsdb-server/connect-active-ovsdb-server
[root@dell-per730-42 ovn]# ovs-appctl -t $NB_PATH run ls-add test1
transaction error: {"details":"insert operation not allowed when database server is in read only mode","error":"not allowed"}
ovs-appctl: /var/run/openvswitch/ovn-nbctl.43870.ctl: server returned an error
[root@dell-per730-42 ovn]# ovs-appctl -t /var/run/ovn/ovnnb_db.ctl ovsdb-server/disconnect-active-ovsdb-server
[root@dell-per730-42 ovn]#  ovs-appctl -t $NB_PATH run ls-add test2
[root@dell-per730-42 ovn]# ovn-nbctl show
switch 75b678fd-c85a-4b63-a069-cecdd598af33 (test)
switch 0bb0c357-65c4-48f7-8c76-a756968c9e2a (test2)
[root@dell-per730-42 ovn]#

Comment 4 errata-xmlrpc 2019-12-11 12:14:59 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-2019:4206