Public bug reported: Description ===========
This is all only when Neutron is using OVS with hybrid plugging. When reverting a resized instance back to its original source host, Nova will timeout waiting for the vif-plugged external event, and never finish the revert. This happens because the event is sent by Neutron as soon as Nova updates the port binding to point back to the original source. This happens before the virt driver gets ready to listen for external events, so the event arrives, just too soon, and Nova times out. Steps to reproduce ================== 1. Resize an instance 2. When it's in VERIFY_RESIZE, revert it Expected result =============== Instance reverts correctly. Actual result ============= Instance goes to ERROR. Environment =========== OVS with hybrid plug. Reported in OSP14/Rocky [1], reproduced on master [2] [3]. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1678681 [2] https://review.opendev.org/#/c/660782/ [3] https://review.opendev.org/#/c/653498/ ** Affects: nova Importance: Undecided Assignee: Artom Lifshitz (notartom) Status: In Progress -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1832028 Title: revert resize: vif-plugged external event sent too soon if Neutron is using OVS hybrid plug Status in OpenStack Compute (nova): In Progress Bug description: Description =========== This is all only when Neutron is using OVS with hybrid plugging. When reverting a resized instance back to its original source host, Nova will timeout waiting for the vif-plugged external event, and never finish the revert. This happens because the event is sent by Neutron as soon as Nova updates the port binding to point back to the original source. This happens before the virt driver gets ready to listen for external events, so the event arrives, just too soon, and Nova times out. Steps to reproduce ================== 1. Resize an instance 2. When it's in VERIFY_RESIZE, revert it Expected result =============== Instance reverts correctly. Actual result ============= Instance goes to ERROR. Environment =========== OVS with hybrid plug. Reported in OSP14/Rocky [1], reproduced on master [2] [3]. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1678681 [2] https://review.opendev.org/#/c/660782/ [3] https://review.opendev.org/#/c/653498/ To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1832028/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
