更新k8s资源：patch，update

update方法：

创建和更新方法：

func Create()  {
	namespace := "wm"
	restConfig, err := clientcmd.BuildConfigFromFlags("", "/home/wm/config")
	if err != nil {
		return
	}
	istioClient,err := versionedclient.NewForConfig(restConfig)
	if err != nil {
		return
	}

	var (
		httpRouteList []*networkingv1alpha3.HTTPRoute
		HTTPRouteDestinationList      []*networkingv1alpha3.HTTPRouteDestination
	)
	HTTPRouteDestination := &networkingv1alpha3.HTTPRouteDestination{
		Destination:         &networkingv1alpha3.Destination{
			Host:                 "reviews",
			Subset:               "v2",
		},

		Weight:               50,
	}
	HTTPRouteDestinationList = append(HTTPRouteDestinationList,HTTPRouteDestination)
	httpRouteSign := networkingv1alpha3.HTTPRoute{

		Route:                 HTTPRouteDestinationList,

	}
	httpRouteList = append(httpRouteList,&httpRouteSign)
	virtualService := &v1alpha3.VirtualService{
		ObjectMeta: v1.ObjectMeta{
			Name: "vs-test", 
			Namespace: namespace,
		},
		Spec:       networkingv1alpha3.VirtualService{
			Hosts: []string{"reviews"}, 
			Gateways: []string{"knative-serving/knative-ingress-gateway"},
			Http:  httpRouteList, 
		},
	}
	vs,err :=istioClient.NetworkingV1alpha3().VirtualServices(namespace).Create(context.TODO(),virtualService,v1.CreateOptions{})
	if err != nil {
		return
	}
	log.Print(vs)
}

func Update()  {
	namespace := "wm"
	restConfig, err := clientcmd.BuildConfigFromFlags("", "/home/wm/config")
	if err != nil {
		return
	}
	istioClient,err := versionedclient.NewForConfig(restConfig)
	if err != nil {
		return
	}

	oldVs, err := istioClient.NetworkingV1alpha3().VirtualServices(namespace).Get(context.TODO(),"vs-test",v1.GetOptions{})
	resourceVersion := oldVs.ObjectMeta.ResourceVersion
	var (
		httpRouteList []*networkingv1alpha3.HTTPRoute
		HTTPRouteDestinationList      []*networkingv1alpha3.HTTPRouteDestination
	)
	HTTPRouteDestination := &networkingv1alpha3.HTTPRouteDestination{
		Destination:         &networkingv1alpha3.Destination{
			Host:                 "reviews",
			Subset:               "v3",
		},

		Weight:               51,
	}
	HTTPRouteDestinationList = append(HTTPRouteDestinationList,HTTPRouteDestination)
	httpRouteSign := networkingv1alpha3.HTTPRoute{

		Route:                 HTTPRouteDestinationList,

	}
	httpRouteList = append(httpRouteList,&httpRouteSign)
	virtualService := &v1alpha3.VirtualService{
		ObjectMeta: v1.ObjectMeta{
			Name: "vs-test", 
			Namespace: namespace,
			ResourceVersion: resourceVersion,
		},
		Spec:       networkingv1alpha3.VirtualService{
			Hosts: []string{"reviews"}, 
			Gateways: []string{"knative-serving/knative-ingress-gateway"},
			Http:  httpRouteList, 
		},
	}
	vs,err :=istioClient.NetworkingV1alpha3().VirtualServices(namespace).Update(context.TODO(),virtualService,v1.UpdateOptions{})
	if err != nil {
		log.Print("Update error:%s", err)
		return
	}
	log.Print(vs)
}

　　

 

patch方法：

JSON Patch 和 JSON Merge Patch 的不同