Public bug reported: * High level description:
When a router transitions to MASTER state, keepalived should send GARPs but it fails because qg-* interface is down(it comes up about 1 sec after that, so it might be some race condition) Keepalived should also send another GARPs after 60 seconds(garp_master_delay) but it doesn't(probably because first ones fail, but I'm not 100% sure). When I add random port to this router to trigger keepalived's reload, then all GARPs are sent properly(because netns is already configured and qg-* interface is up for the whole time) * Pre-conditions: Operating System: Ubuntu 20.04 Keepalived version: 2.0.19 Affected neutron releases: - my AIO env: Xena (master/106fa3e6d3f0b1c32ef28fe9dd6b125b9317e9cf # HEAD as of 29.09.2021) - my prod env: Victoria - (most likely all versions after this change https://review.opendev.org/c/openstack/neutron/+/707406) * Step-by-step reproduction: Simply perform a failover on HA router. The same goal may be also achieved by removing all l3 agents from the router, and then adding one, so: # openstack router create neutron-bug # openstack router set --external-gateway public neutron-bug # neutron l3-agent-list-hosting-router neutron-bug # (for all l3 agents): neutron l3-agent-router-remove L3_AGENT_ID neutron-bug # (for a single l3 agent): neutron l3-agent-router-add L3_AGENT_ID neutron-bug (GARPs are not sent) # openstack router add port neutron-bug test-port (GARPs are sent properly) * Expected output: Gratuitous ARPs should be sent from router's namespace during MASTER transition. * Actual output: Gratuitous ARPs are not sent. Keepalived complains about: Error 100 (Network is down) sending gratuitous ARP on qg-4a2f0239-5c for 172.29.249.194 qg-* interface wakes up about 1 second after keepalived tries to send GARPs. * Attachments: Keepalived logs: https://paste.openstack.org/raw/811372/ Interfaces inside router's netns + tcpdump from master transition: https://paste.openstack.org/raw/811373/ ** 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/1952907 Title: Gratuitous ARPs are not sent during master transition Status in neutron: New Bug description: * High level description: When a router transitions to MASTER state, keepalived should send GARPs but it fails because qg-* interface is down(it comes up about 1 sec after that, so it might be some race condition) Keepalived should also send another GARPs after 60 seconds(garp_master_delay) but it doesn't(probably because first ones fail, but I'm not 100% sure). When I add random port to this router to trigger keepalived's reload, then all GARPs are sent properly(because netns is already configured and qg-* interface is up for the whole time) * Pre-conditions: Operating System: Ubuntu 20.04 Keepalived version: 2.0.19 Affected neutron releases: - my AIO env: Xena (master/106fa3e6d3f0b1c32ef28fe9dd6b125b9317e9cf # HEAD as of 29.09.2021) - my prod env: Victoria - (most likely all versions after this change https://review.opendev.org/c/openstack/neutron/+/707406) * Step-by-step reproduction: Simply perform a failover on HA router. The same goal may be also achieved by removing all l3 agents from the router, and then adding one, so: # openstack router create neutron-bug # openstack router set --external-gateway public neutron-bug # neutron l3-agent-list-hosting-router neutron-bug # (for all l3 agents): neutron l3-agent-router-remove L3_AGENT_ID neutron-bug # (for a single l3 agent): neutron l3-agent-router-add L3_AGENT_ID neutron-bug (GARPs are not sent) # openstack router add port neutron-bug test-port (GARPs are sent properly) * Expected output: Gratuitous ARPs should be sent from router's namespace during MASTER transition. * Actual output: Gratuitous ARPs are not sent. Keepalived complains about: Error 100 (Network is down) sending gratuitous ARP on qg-4a2f0239-5c for 172.29.249.194 qg-* interface wakes up about 1 second after keepalived tries to send GARPs. * Attachments: Keepalived logs: https://paste.openstack.org/raw/811372/ Interfaces inside router's netns + tcpdump from master transition: https://paste.openstack.org/raw/811373/ To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1952907/+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
