feat(lb): honor lb vip mask from api

pkg/kloudlb/controller/controller.go

@@ -3,6 +3,7 @@ package controller
 import (
 	"context"
 	"fmt"
+	"net"
 	"os"
 	"strings"
 	"time"
@@ -14,9 +15,9 @@ import (
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
 	corelisters "k8s.io/client-go/listers/core/v1"
+	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/leaderelection"
 	"k8s.io/client-go/tools/leaderelection/resourcelock"
-	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/util/workqueue"
 
 	"github.com/KubelanCloud/kks-provider-plugin/pkg/kloudlb"
@@ -177,16 +178,22 @@ func (c *Controller) sync(ctx context.Context, key string) error {
 	if err != nil {
 		return err
 	}
+	vip := strings.TrimSpace(lb.IP)
+	ingressIP, err := vipIngressIP(vip)
+	if err != nil {
+		return err
+	}
 
 	patch := svc.DeepCopy()
 	if patch.Annotations == nil {
 		patch.Annotations = map[string]string{}
 	}
-	patch.Annotations[kloudlb.AnnotationIP] = lb.IP
+	patch.Annotations[kloudlb.AnnotationIP] = ingressIP
+	patch.Annotations[kloudlb.AnnotationVIP] = vip
 	patch.Annotations[kloudlb.AnnotationLBID] = lb.ID
 	patch.Status = corev1.ServiceStatus{
 		LoadBalancer: corev1.LoadBalancerStatus{
-			Ingress: []corev1.LoadBalancerIngress{{IP: lb.IP}},
+			Ingress: []corev1.LoadBalancerIngress{{IP: ingressIP}},
 		},
 	}
 
@@ -194,6 +201,29 @@ func (c *Controller) sync(ctx context.Context, key string) error {
 	return err
 }
 
+func vipIngressIP(vip string) (string, error) {
+	vip = strings.TrimSpace(vip)
+	if vip == "" {
+		return "", fmt.Errorf("load balancer vip is empty")
+	}
+	if strings.Contains(vip, "/") {
+		ip, _, err := net.ParseCIDR(vip)
+		if err != nil {
+			return "", fmt.Errorf("invalid load balancer vip %q: %w", vip, err)
+		}
+		ipv4 := ip.To4()
+		if ipv4 == nil {
+			return "", fmt.Errorf("load balancer vip %q is not ipv4", vip)
+		}
+		return ipv4.String(), nil
+	}
+	ip := net.ParseIP(vip)
+	if ip == nil || ip.To4() == nil {
+		return "", fmt.Errorf("invalid load balancer vip %q", vip)
+	}
+	return ip.String(), nil
+}
+
 func (c *Controller) finalize(ctx context.Context, svc *corev1.Service) error {
 	if !containsString(svc.Finalizers, kloudlb.Finalizer) {
 		return nil