openstack/octavia
Code Issues Proposed changes

Merge "Resolve a UDP rebalance issue on backend failure"

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Zuul
2025-08-25 11:51:05 +00:00
committed by Gerrit Code Review
parent d6680d73ec 4af823cc75
commit 4cde74a24b
2 changed files with 13 additions and 0 deletions
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3
octavia/amphorae/backends/agent/api_server/templates/amphora-netns.systemd.j2
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@@ -23,6 +23,9 @@ ExecStart=-/sbin/sysctl -w net.netfilter.nf_conntrack_expect_max=488
ExecStart=-/sbin/ip netns exec {{ amphora_nsname }} sysctl -w net.ipv4.ip_forward=1
ExecStart=-/sbin/ip netns exec {{ amphora_nsname }} sysctl -w net.ipv4.vs.conntrack=1
ExecStart=-/sbin/ip netns exec {{ amphora_nsname }} sysctl -w net.ipv6.conf.all.forwarding=1
# Ensure the connection cache is flushed immediately on real server removal
ExecStart=-/sbin/ip netns exec {{ amphora_nsname }} sysctl -w net.ipv4.vs.expire_nodest_conn=1
ExecStart=-/sbin/ip netns exec {{ amphora_nsname }} sysctl -w net.ipv4.vs.expire_quiescent_template=1
# We need the plugged_interfaces file sorted to join the host interfaces
ExecStart=-/bin/sh -c '/usr/bin/sort -k 1 /var/lib/octavia/plugged_interfaces > /var/lib/octavia/plugged_interfaces.sorted'
# Assign the interfaces into the namespace with the appropriate name

10
releasenotes/notes/Fix-UDP-member-server-rebalance-74c67cb09c7c529a.yaml Normal file
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@@ -0,0 +1,10 @@
---
upgrade:
- |
UDP load balancers will require a failover to fix the UDP rebalance issue
once the control plane is updated.
fixes:
- |
Fixed an issue where UDP listeners may not rebalance failed member servers
in a timely fashion. It may have been up to five minutes for a failed
member server to be removed from existing flows.