From 172f315dad0a18466760dd87a522caa171e66e26 Mon Sep 17 00:00:00 2001
From: Marnix Bouhuis <marnix@bouhuis.com>
Date: Sat, 4 Jan 2025 23:43:15 +0100
Subject: [PATCH] Ignore link local addresses as these give issues during
 cluster bootstrapping

---
 pkg/cloud-controller-manager/instance.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkg/cloud-controller-manager/instance.go b/pkg/cloud-controller-manager/instance.go
index 3d9b51d5..362f1ed0 100644
--- a/pkg/cloud-controller-manager/instance.go
+++ b/pkg/cloud-controller-manager/instance.go
@@ -19,6 +19,8 @@ import (
 	kubevirtv1 "kubevirt.io/api/core/v1"
 )
 
+var linkLocalIPv6Range = netip.MustParsePrefix("fe80::/10")
+
 type instanceManager struct {
 	vmClient     ctlkubevirtv1.VirtualMachineClient
 	vmiClient    ctlkubevirtv1.VirtualMachineInstanceClient
@@ -123,6 +125,11 @@ func getNodeAddresses(node *v1.Node, vmi *kubevirtv1.VirtualMachineInstance) ([]
 				continue
 			}
 
+			// Skip addresses in link local range, other nodes don't seem to be able to reach this address during cluster bootstrapping.
+			if ip.Is6() && linkLocalIPv6Range.Contains(ip) {
+				continue
+			}
+
 			// Determine if the IP should be listed as an internal or external IP.
 			ipType := v1.NodeExternalIP
 			for _, internalPrefix := range internalIPRanges {