neutron/releasenotes/notes/ovn_l3_reschedules_lower_lrps-5b492131dab9040b.yaml
Felix Huettner 3d5d82a197 ovn-l3: reschedule lower priorities
if a gateway chassis is removed we previously only plugged the hole it
left in the priorities of the lrps. This can lead to bad choice since we
are bound by all other currently used chassis.
By allowing us to also reschedule the lower priorities we get
significantly more freedom in choosing the most appropriate chassis and
prevent overloading an individual one.

As an example from the new testcase:
previously we would have had all prio 2 schedules on chassis3, but with
this change now this distributes better also to chassis4.

Partial-Bug: #2023993
Change-Id: I786ff6c0c4d3403b79819df95f9b1d6ac5e8675f
2024-01-17 12:04:09 +01:00

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The OVN L3 scheduler will now update lower priorities of exising LRPs in
case of a chassis change. This can create increased load on OVN during
chassis shutdown, but improves the load distribution of LRPs.