Add public ipv6 node address support (#898)

When used with droplets that have public ipv6 addresses, these will be
added to the node metadata.

Author: gottwald

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## unreleased
 
+* Add public ipv6 node address handling (@gottwald)
+
 ## v0.1.65 (beta) - January 14, 2026
 
 * Fix syncTags error handling bug (@gottwald)

cloud-controller-manager/do/common.go

@@ -137,11 +137,20 @@ func nodeAddresses(droplet *godo.Droplet) ([]v1.NodeAddress, error) {
 	}
 	addresses = append(addresses, v1.NodeAddress{Type: v1.NodeInternalIP, Address: privateIP})
 
-	publicIP, err := droplet.PublicIPv4()
-	if err != nil || publicIP == "" {
-		return nil, fmt.Errorf("could not get public ip: %v", err)
+	publicIPv4, err := droplet.PublicIPv4()
+	if err != nil || publicIPv4 == "" {
+		return nil, fmt.Errorf("could not get public ipv4: %v", err)
+	}
+	addresses = append(addresses, v1.NodeAddress{Type: v1.NodeExternalIP, Address: publicIPv4})
+
+	publicIPv6, err := droplet.PublicIPv6()
+	if err != nil {
+		return nil, fmt.Errorf("could not get public ipv6: %v", err)
+	}
+	if publicIPv6 != "" {
+		// not all instances come with ipv6 addresses
+		addresses = append(addresses, v1.NodeAddress{Type: v1.NodeExternalIP, Address: publicIPv6})
 	}
-	addresses = append(addresses, v1.NodeAddress{Type: v1.NodeExternalIP, Address: publicIP})
 
 	return addresses, nil
 }