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Bug 1910347

Summary:	igmp options are not persistent after reboot
Product:	Red Hat OpenStack	Reporter:	Miguel Angel Nieto <mnietoji>
Component:	openvswitch	Assignee:	Open vSwitch development team <ovs-team>
Status:	CLOSED NOTABUG	QA Contact:	Eran Kuris <ekuris>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	16.1 (Train)	CC:	apevec, chrisw, hakhande, ralonsoh, rhos-maint
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Hardware:	Unspecified
OS:	Unspecified
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Clone Of:		Environment:
Last Closed:	2021-01-05 09:13:06 UTC	Type:	Bug
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Miguel Angel Nieto 2020-12-23 14:35:42 UTC

DDescription of problem:

igmp options are not persistent after reboot. This issue is happening in osp13 too, i opened this bz for osp13: https://bugzilla.redhat.com/show_bug.cgi?id=1910304


This is how I reproduce it:

1. Configure options:
   sudo ovs-vsctl set Bridge br-int mcast_snooping_enable=true
   sudo ovs-vsctl set Bridge br-int other_config:mcast-snooping-disable-flood- 
  unregistered=true
2. Get configuration
   ovs-vsctl list bridge br-int
_uuid               : c6875d8d-1500-4f02-9158-e039847b291e
auto_attach         : []
controller          : [83058d89-805e-4fa9-8ff8-275e211b1d22]
datapath_id         : "00008e5d87c6024f"
datapath_type       : netdev
datapath_version    : "<built-in>"
external_ids        : {}
fail_mode           : secure
flood_vlans         : []
flow_tables         : {}
ipfix               : []
mcast_snooping_enable: true
mirrors             : []
name                : br-int
netflow             : []
other_config        : {mac-table-size="50000", mcast-snooping-disable-flood-unregistered="true"}
ports               : [2bdecc2a-2172-4cd8-9cc2-5cf15298ae7d, 2e8a714c-a543-4b53-a84e-820129d84162, aadaafd2-6a4a-4783-a8b7-649db45a9bef, ad320f9a-8331-47b8-8400-58df9e47b5ad, b0c24414-a25c-49ef-816f-b041f51d5917]
protocols           : ["OpenFlow10", "OpenFlow11", "OpenFlow12", "OpenFlow13", "OpenFlow14"]
rstp_enable         : false
rstp_status         : {}
sflow               : []
status              : {}
stp_enable          : false

3. Restart ovs
   systemctl restart openvswitch.service

4. Get ovs options
   ovs-vsctl list bridge br-int
_uuid               : c6875d8d-1500-4f02-9158-e039847b291e
auto_attach         : []
controller          : [c1c983ad-4449-4d1b-857e-ffbed97a87e1]
datapath_id         : "00008e5d87c6024f"
datapath_type       : netdev
datapath_version    : "<built-in>"
external_ids        : {}
fail_mode           : secure
flood_vlans         : []
flow_tables         : {}
ipfix               : []
mcast_snooping_enable: false
mirrors             : []
name                : br-int
netflow             : []
other_config        : {mac-table-size="50000", mcast-snooping-disable-flood-unregistered=False}
ports               : [2bdecc2a-2172-4cd8-9cc2-5cf15298ae7d, 2e8a714c-a543-4b53-a84e-820129d84162, aadaafd2-6a4a-4783-a8b7-649db45a9bef, ad320f9a-8331-47b8-8400-58df9e47b5ad, b0c24414-a25c-49ef-816f-b041f51d5917]
protocols           : ["OpenFlow10", "OpenFlow11", "OpenFlow12", "OpenFlow13", "OpenFlow14"]
rstp_enable         : false
rstp_status         : {}
sflow               : []
status              : {}
stp_enable          : false


Version-Release number of selected component (if applicable):
2020-11-13.1
openvswitch2.11-2.11.3-64.el7fdp.x86_64

Actual results:
configuration is lost after reboot


Expected results:
configuration should not be lost


Additional info:

Comment 1 Miguel Angel Nieto 2020-12-23 14:39:07 UTC

sorry, puddle in the descrition is for osp13, for osp16 versions is:
RHOS-16.1-RHEL-8-20201214.n.3

Comment 2 Rodolfo Alonso 2021-01-05 09:13:06 UTC

Hello:

The integration bridge "mcast_snooping_enable" and "other_config:mcast-snooping-disable-flood-unregistered" options are set during the OVS agent initialization, according to the configuration parameter "OVS.igmp_snooping_enable".

Any value set on those configuration options will be overwritten during the OVS initialization when [1] is executed. In order to set a desirable value, please modify "OVS.igmp_snooping_enable".

*NOTE*: any manual action or configuration on the Open vSwitch is not recommended. OVS agent is in charge of handling and configuring this service. No manual configuration commands should be executed.

Regards.

[1]https://github.com/openstack/neutron/blob/4d33a64931fd35583952e45dbc8fd7272cb67c0d/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L1339