Public bug reported: Open vSwitch v2.16 introduces a change of behavior for clustered databases, before the leader creates a snapshot of the database it will transfer leadership to a different server.
For versions of Neutron where the Southbound DB IDL requires a connection to the leader this will cause frequent reconnection. In a loaded system this will subsequently lead to increased rate of API errors for the neutron-server and delays for the neutron-ovn-metadata agent which manifest itself as instances not getting metadata. In the main branch Neutron has recently changed to not require a connection to the leader for the Southbound DB [0]. End users can choose to use more recent versions of OVS and OVN than what was available at the time of release of past OpenStack releases, so we would like to have this change backported to Ussuri. This bug is to track the backport of the change. 0: https://review.opendev.org/c/openstack/neutron/+/803268 ** Affects: neutron Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1961013 Title: [stable][ovn] frequent OVN DB leader changes increase rate of Neutron API errors Status in neutron: New Bug description: Open vSwitch v2.16 introduces a change of behavior for clustered databases, before the leader creates a snapshot of the database it will transfer leadership to a different server. For versions of Neutron where the Southbound DB IDL requires a connection to the leader this will cause frequent reconnection. In a loaded system this will subsequently lead to increased rate of API errors for the neutron-server and delays for the neutron-ovn-metadata agent which manifest itself as instances not getting metadata. In the main branch Neutron has recently changed to not require a connection to the leader for the Southbound DB [0]. End users can choose to use more recent versions of OVS and OVN than what was available at the time of release of past OpenStack releases, so we would like to have this change backported to Ussuri. This bug is to track the backport of the change. 0: https://review.opendev.org/c/openstack/neutron/+/803268 To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1961013/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp