This bug was fixed in the package neutron - 2:16.4.2-0ubuntu6.4~cloud0
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neutron (2:16.4.2-0ubuntu6.4~cloud0) bionic-ussuri; urgency=medium
.
* New update for the Ubuntu Cloud Archive.
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neutron (2:16.4.2-0ubuntu6.4) focal; urgency=medium
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[ Corey Bryant ]
* d/p/ovn-db-sync-continue-on-duplicate-normalise.patch: Cherry-picked
from upstream to allow ovn_db_sync to continue on duplicate normalised
CIDR (LP: #1961112).
* d/p/ovn-db-sync-check-for-router-port-differences.patch:
Cherry-picked from upstream to ensure router ports are marked
for needing updates only if they have changed (LP: #2030773).
* d/p/ovn-specify-port-type-if-router-port-when-updating.patch:
Specify port type if it's a router port when updating to avoid
port flapping (LP: #1955578).
* d/p/fix-acl-sync-when-default-sg-group-created.patch:
Cherry-picked form upstream to fix ACL sync when default security
group is created (LP: #2008943).
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[ Mustafa Kemal GILOR ]
* d/p/add_uplink_status_propagation.patch: Add the
'uplink-status-propagation' extension to ML2/OVN (LP: #2032770).
** Changed in: cloud-archive/ussuri
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2030773
Title:
OVN DB Sync always logs warning messages about updating all router
ports
Status in Ubuntu Cloud Archive:
Fix Released
Status in Ubuntu Cloud Archive antelope series:
Fix Released
Status in Ubuntu Cloud Archive ussuri series:
Fix Released
Status in Ubuntu Cloud Archive victoria series:
Fix Released
Status in Ubuntu Cloud Archive wallaby series:
Fix Released
Status in Ubuntu Cloud Archive xena series:
Fix Released
Status in Ubuntu Cloud Archive yoga series:
Fix Released
Status in Ubuntu Cloud Archive zed series:
Fix Released
Status in neutron:
Fix Released
Status in neutron package in Ubuntu:
Fix Released
Status in neutron source package in Focal:
Fix Released
Status in neutron source package in Jammy:
Fix Released
Status in neutron source package in Lunar:
Fix Released
Bug description:
Reported at: https://bugzilla.redhat.com/show_bug.cgi?id=2225156
The ovn-db-sync script does not check if the router ports are actually
out-of-sync before adding it to the list of ports that needs to be
updated, this can create red herring problems by introducing an
irrelevant piece of information [0] in the sync report (specially when
ran in "log" mode) making the user think that the databases might be
out-of-sync even when it is not.
Looking at the code [1] we can see that the comment talks about
checking the networks and ipv6_ra_configs changes but it does neither;
instead, it adds every router port to the list of ports that needs to
be updated.
<snipet>
# We dont have to check for the networks and
# ipv6_ra_configs values. Lets add it to the
# update_lrport_list. If they are in sync, then
# update_router_port will be a no-op.
update_lrport_list.append(db_router_ports[lrport])
</snipet>
This LP is about changing this behavior and checking for such
differences in the router ports before marking them to be updated.
[0]
2023-07-24 11:46:31.391 952358 WARNING networking_ovn.ovn_db_sync
[req-1081a8a6-82dd-431c-a2ab-f58741dc1677 - - - - -] Router Port
port_id=f164c0f1-8ac8-4c45-bba9-8c723a30c701 needs to be updated for networks
changed
[1]
https://github.com/openstack/neutron/blob/c453813d0664259c4da0d132f224be2eebe70072/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_db_sync.py#L553-L557
===== Ubuntu SRU Details =====
[Impact]
See bug description above.
[Test Case]
Deploy openstack with OVN and multiple routers. Run the ovn-db-sync script
and ensure router ports that are not out of sync are not marked to be updated.
[Where problems could occur]
If the _is_router_port_changed() function had a bug there would be potential
for ports to be filtered out that need updating. Presumably this is not the
case, but that is a theoritical potential for where problems could occur. All
of these patches have already landed in the corresponding upstream branches.
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