Public bug reported: The port binding phase is part of the VM spawning process. Regardless of the backend used (ML2/OVN, ML2/OVS), it needs to detect the port created and inform to the Neutron API. At this point, the Neutron API will consider the port as UP and will inform to Nova (vif-plugged-event); Nova will send the port binding request after this event.
In ML2/OVN it is possible that the OVN databases are configured in a OVSDB RAFT cluster. If by any circumstance the RAFT leader changes, the active IDL connections to OVN NB and SB databases will temporarily disconnect and reconnect again. During this time gap, if the ``LogicalSwitchPortUpdateUpEvent`` arrives, it won't be processed. When the IDL reconnects, it will send all the registers tagged as CREATED, including the missed Logical_Switch_Port event setting to UP this port. The goal of this bug is to make this event resilient to IDL disconnections and prevent timeouts during a VM creation. [1]https://docs.ovn.org/en/latest/tutorials/ovn-ovsdb-relay.html ** 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/2101140 Title: [OVN] Make LSP up/down events processing resilient to IDL disconnections Status in neutron: New Bug description: The port binding phase is part of the VM spawning process. Regardless of the backend used (ML2/OVN, ML2/OVS), it needs to detect the port created and inform to the Neutron API. At this point, the Neutron API will consider the port as UP and will inform to Nova (vif-plugged- event); Nova will send the port binding request after this event. In ML2/OVN it is possible that the OVN databases are configured in a OVSDB RAFT cluster. If by any circumstance the RAFT leader changes, the active IDL connections to OVN NB and SB databases will temporarily disconnect and reconnect again. During this time gap, if the ``LogicalSwitchPortUpdateUpEvent`` arrives, it won't be processed. When the IDL reconnects, it will send all the registers tagged as CREATED, including the missed Logical_Switch_Port event setting to UP this port. The goal of this bug is to make this event resilient to IDL disconnections and prevent timeouts during a VM creation. [1]https://docs.ovn.org/en/latest/tutorials/ovn-ovsdb-relay.html To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/2101140/+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
