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Who When What Removed Added
Red Hat One Jira (issues.redhat.com) 2023-08-07 15:09:18 UTC Link ID Red Hat Issue Tracker OSP-27266
Khomesh Thakre 2023-08-08 07:06:55 UTC CC mburns
QA Contact ekuris jhakimra
Component python-networking-ovn openstack-tripleo-heat-templates
Lukas Bezdicka 2023-08-08 10:34:20 UTC Assignee rhos-maint lbezdick
Target Milestone --- z1
CC lbezdick
Priority unspecified urgent
QA Contact jhakimra ekuris
Status NEW ON_DEV
Severity unspecified urgent
Component openstack-tripleo-heat-templates python-networking-ovn
Keywords Triaged
RHEL Program Management 2023-08-08 10:34:33 UTC Target Release --- 17.1
Khomesh Thakre 2023-08-08 11:01:12 UTC QA Contact ekuris kthakre
Jesse Pretorius 2023-08-08 13:31:04 UTC CC jpretori
Eran Kuris 2023-08-09 10:36:46 UTC CC ekuris
Severity urgent medium
Lukas Svaty 2023-08-10 11:17:11 UTC CC lsvaty
Lukas Bezdicka 2023-08-10 13:15:25 UTC Doc Text Cause:
There is race in deployment steps for ovn_controller and ovn_dbs which causes ovn_dbs to be upgraded before ovn_controller.
Consequence:
If ovn_controller is not upgraded before ovn_dbs it will throw error before being restarted to the new version causing packet loss.

Workaround (if any):

Result:
Estimated 1min network outage if the race is hit during OVN upgrade.
Doc Type If docs needed, set a value Known Issue
Jenny-Anne Lynch 2023-08-10 15:24:59 UTC Doc Text Cause:
There is race in deployment steps for ovn_controller and ovn_dbs which causes ovn_dbs to be upgraded before ovn_controller.
Consequence:
If ovn_controller is not upgraded before ovn_dbs it will throw error before being restarted to the new version causing packet loss.

Workaround (if any):

Result:
Estimated 1min network outage if the race is hit during OVN upgrade.
There is currently a known issue with a race condition in the deployment steps for `ovn_controller` and `ovn_dbs`, which causes `ovn_dbs` to be upgraded before `ovn_controller`. If `ovn_controller` is not upgraded before `ovn_dbs`, an error before the restart to the new version causes packet loss. There is an estimated one-minute network outage if the race condition occurs during the Open Virtual Network (OVN) upgrade. A fix is expected in a later RHOSP release.
Flags needinfo?(lbezdick)
CC jelynch
Lukas Bezdicka 2023-08-14 09:35:34 UTC Flags needinfo?(lbezdick)
Paul Grist 2023-08-14 14:11:26 UTC CC pgrist

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