spec:
  hosts:
  - reviews
  http:
  - route:
    - destination:
        host: reviews
        subset: v3
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - ratings
  http:
  - route:
    - destination:
        host: ratings
        subset: v2-mysql-vm

spec:
  hosts:
  - reviews
  http:
  - match:
    - headers:
        end-user:
          exact: jason
    route:
    - destination:
        host: reviews
        subset: v2
  - route:
    - destination:
        host: reviews

    fault:
      delay:
        percentage:
          value: 100.0
        fixedDelay: 7s
    route:
    - destination:
        host: ratings
        subset: v1
  - route:
    - destination:
        host: ratings

spec:
  hosts:
  - reviews
  http:
  - route:
    - destination:
        host: reviews
        subset: v3
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - ratings
  http:
  - route:
    - destination:
        host: ratings
        subset: v2

	}
	subset1 := func(eps *discovery.EndpointSlice) {
		eps.AddressType = discovery.AddressTypeIPv4
		eps.Endpoints = []discovery.Endpoint{{
			Addresses: []string{"10.1.1.1"},
		}}
		eps.Ports = []discovery.EndpointPort{{
			Name:     ptr.To("p11"),
			Port:     ptr.To[int32](11),
			Protocol: ptr.To(v1.ProtocolUDP),
		}}
	}
	subset2 := func(eps *discovery.EndpointSlice) {

metadata:
  name: valid-virtual-service
spec:
  hosts:
    - c
  http:
    - route:
      - destination:
          host: c
          subset: v1
        weight: 75
      - destination:
          host: c
          subset: v2
        weight: 25`
	validVirtualServiceJSON = `{
"apiVersion": "networking.istio.io/v1alpha3",
"kind": "VirtualService",
"metadata": {

        subset: external-svc-tcp
        port:
          number: {{ .forwardProxyPort }}
  tls:
  - match:
    - sniHosts:
      - external.{{ .externalNamespace }}.svc.cluster.local
      port: {{ .externalSvcTlsPort }}
    route:
    - destination:
        host: external-forward-proxy.{{ .externalNamespace }}.svc.cluster.local
        subset: external-svc-tls
        port:

// could have labels gitCommit=aeiou234, region=us-east, while v2 instances could
// have labels name=kittyCat,region=us-east.
type Instance map[string]string

// SubsetOf is true if the label has same values for the keys
func (i Instance) SubsetOf(that Instance) bool {
	if len(i) == 0 {
		return true
	}

	if len(that) == 0 || len(that) < len(i) {
		return false
	}

	for k, v1 := range i {

	maps.Copy(dst, override)
	return dst
}

// Contains checks if all key-value pairs in 'subset' are present in 'superset'.
// It returns true only if every key in 'subset' exists in 'superset' and their corresponding values are equal.
func Contains[M1, M2 ~map[K]V, K comparable, V comparable](superset M1, subset M2) bool {
	for key, value := range subset {
		if supersetValue, ok := superset[key]; !ok || supersetValue != value {
			return false
		}

		return true
	}, exclude(excluded...))
}

// Configs returns the subset that are config clusters.
func (c Clusters) Configs(excluded ...Cluster) Clusters {
	return c.filterClusters(func(cc Cluster) bool {
		return cc.IsConfig()
	}, exclude(excluded...))
}

// Remotes returns the subset that are remote clusters.
func (c Clusters) Remotes(excluded ...Cluster) Clusters {