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OCPBUGS-86571: templates: disable IPv4 DAD to fix nodeip-configuration race #6098

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OCPBUGS-86571: templates: disable IPv4 DAD to fix nodeip-configuration race #6098

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12 changes: 12 additions & 0 deletions templates/common/_base/files/NetworkManager-no-dad.yaml
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Original file line number Diff line number Diff line change
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mode: 0644
path: "/etc/NetworkManager/conf.d/01-no-dad.conf"
contents:
inline: |
# Disable IPv4 DAD (Duplicate Address Detection / Address Conflict Detection).
# RHEL 10 enables this by default, which delays IPv4 address assignment by ~3s
# while ACD probing runs. This causes a race condition where
# nodeip-configuration.service may run before the IPv4 address is assigned,
# resulting in IPv6-only kubelet configuration on dual-stack clusters.
# See: https://issues.redhat.com/browse/OCPBUGS-86571
[connection]
ipv4.dad-timeout=0