kubeovn / kube-ovn / 24283852894

25%

Build Type

push

github

Committed by web-flow

Commit Message

fix(underlay): wait for localnet patch port before IPv6 DAD (#6621)

* fix(underlay): wait for localnet patch port before IPv6 DAD

In underlay subnets, the kernel IPv6 DAD may run before the localnet
patch port (created asynchronously by ovn-controller) is ready. Without
L2 connectivity to the physical network, the DAD Neighbor Solicitation
packets are silently dropped, causing DAD to falsely succeed and miss
duplicate address conflicts.

Wait for the localnet patch port to appear in OVS after the pod port
is ready (ovn-installed=true) but before configuring the container NIC.
This ensures L2 connectivity is established when the kernel starts DAD.

The fix only applies to underlay subnets (has VLAN, non-logical gateway);
overlay subnets are not affected.

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

* fix(underlay): improve error message in waitForLocalnetPatchPort

Use "failed waiting" instead of "timeout waiting" since the error may
not always be a timeout (e.g. OVSDB connectivity issues).

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

---------

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Coverage Stats

0 of 19 new or added lines in 2 files covered. (0.0%)

2 existing lines in 1 file now uncovered.

13798 of 56270 relevant lines covered (24.52%)

0.29 hits per line