Description of problem: OVN migration hangs on "Sync neutron db with OVN db" task. Dowstream CI job is not able to complete OVN migration during 10 hours and then timeouts. From the ovn migration tool log: TASK [migration : Sync neutron db with OVN db (container) - Run 1] ************* task path: /home/stack/ovn_migration/playbooks/roles/migration/tasks/sync-dbs.yml:7 Wednesday 02 November 2022 19:15:38 +0000 (0:00:01.182) 0:45:48.529 **** META: noop META: noop We had the similar situation with OSP17.0 and the reason was a regression caused by https://review.opendev.org/c/openstack/neutron/+/781555 and it was fixed upstream by https://review.opendev.org/c/openstack/neutron/+/817637 or or https://review.opendev.org/c/openstack/neutron/+/805768 Version-Release number of selected component (if applicable): RHOS-16.1-RHEL-8-20221031.n.1 python3-networking-ovn-7.3.1-1.20221013173226.4e24f4c How reproducible: 100% Steps to Reproduce: 1.Deploy OSP16.1 HA environment (3 controllers+ 2 computes) with ML2OVS neutron backend 2. Create a workload, router, network, VM connected to the network 3. Try to run migration to ML2OVN according to the official procedure https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.2/html-single/migrating_the_networking_service_to_the_ml2ovn_mechanism_driver/index Actual results: OVN migration script get stuck on "Sync neutron db with OVN db" task. Expected results: OVN migration does not get stuck and finishes successfully. Additional info:
Hi Eran We can skip 16.1, but we need to support 16.2 for OVN migration. So this bug needs to be addressed for 16.2.z Regards Gurpreet
(In reply to Gurpreet Singh from comment #6) > Hi Eran > > We can skip 16.1, but we need to support 16.2 for OVN migration. So this bug > needs to be addressed for 16.2.z > > Regards > Gurpreet Thanks, Gurpreet. so we have the approval to drop OVN migration support from OSP16.1 The support for 16.2 will stay. This issue is tracked for 16.2 via this BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2139674 James, we need to make sure this change will be documented.
Verified on RHOS-16.1-RHEL-8-20221116.n.1 with python3-networking-ovn-7.3.1-1.20221013173227.4e24f4c.el8ost.noarch.rpm Verified by running ovs2ovn d/s CI job. Migration to OVN did not hang and completed successfully.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Red Hat OpenStack Platform 16.1.9 bug fix and enhancement advisory), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2022:8795