Add IPv6 regional network LB support

This also changes the behavior for other LBs slightly.
We will now only add ready nodes to the LB config.
The defaults in certain cases change depending on what the nodes in the
cluster support. If there's a mix of old and new nodes, we keep the old
behavior until the last old node is gone.

Author: gottwald

CHANGELOG.md

@@ -1,6 +1,9 @@
 ## unreleased
 
 * Add public ipv6 node address handling (@gottwald)
+* Add automatic dual-stack support for REGIONAL_NETWORK load balancers when all cluster nodes support dual-stack networking (@gottwald)
+* Add node filtering to load balancers: only Ready nodes with appropriate IP addresses are included in load balancers (@gottwald)
+* Emit Kubernetes events when load balancer configuration errors occur (e.g., explicit dual-stack annotation with IPv4-only nodes) (@gottwald)
 
 ## v0.1.65 (beta) - January 14, 2026
 

cloud-controller-manager/do/certificates_test.go

@@ -312,21 +312,9 @@ func Test_LBaaSCertificateScenarios(t *testing.T) {
 	}
 
 	nodes := []*v1.Node{
-		{
-			ObjectMeta: metav1.ObjectMeta{
-				Name: "node-1",
-			},
-		},
-		{
-			ObjectMeta: metav1.ObjectMeta{
-				Name: "node-2",
-			},
-		},
-		{
-			ObjectMeta: metav1.ObjectMeta{
-				Name: "node-3",
-			},
-		},
+		newNodeWithIPs("node-1", "10.0.0.1", "2001:db8::1", true),
+		newNodeWithIPs("node-2", "10.0.0.2", "2001:db8::2", true),
+		newNodeWithIPs("node-3", "10.0.0.3", "2001:db8::3", true),
 	}
 	droplets := []godo.Droplet{
 		{