Public bug reported: Because of the fix for bug #1597461[1] L3 agent puts all it's HA ports down during initialization phase. Unfortunately such operation can break already working L3 communication when you restart agent service (rewiring port from down state to up can takes few seconds and some VRRP packages could be lost so router HA state change may be triggered).
This is an effect of calling: self.plugin_rpc.update_all_ha_network_port_statuses in neutron/agent/l3/agent.py#L393 during L3 agent initialization phase in _check_ha_router_process_status. Restarting agent process should not affect already working configuration (customer traffic). Possibly workaround would be to put HA ports to DOWN state only on host restart and not on every L3 agent restart. [1] https://bugs.launchpad.net/neutron/+bug/1597461 ** Affects: neutron Importance: Undecided Assignee: Krzysztof Tomaszewski (labedz) Status: In Progress ** Tags: l3-dvr-backlog -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1959151 Title: Don't set HA ports down while L3 agent restart. Status in neutron: In Progress Bug description: Because of the fix for bug #1597461[1] L3 agent puts all it's HA ports down during initialization phase. Unfortunately such operation can break already working L3 communication when you restart agent service (rewiring port from down state to up can takes few seconds and some VRRP packages could be lost so router HA state change may be triggered). This is an effect of calling: self.plugin_rpc.update_all_ha_network_port_statuses in neutron/agent/l3/agent.py#L393 during L3 agent initialization phase in _check_ha_router_process_status. Restarting agent process should not affect already working configuration (customer traffic). Possibly workaround would be to put HA ports to DOWN state only on host restart and not on every L3 agent restart. [1] https://bugs.launchpad.net/neutron/+bug/1597461 To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1959151/+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
