- k8s.io/kubernetes/pkg/apis/core/install
      - k8s.io/kubernetes/pkg/apis/core/v1
      - k8s.io/kubernetes/pkg/apis/discovery
      - k8s.io/kubernetes/pkg/apis/discovery/install
      - k8s.io/kubernetes/pkg/apis/discovery/v1alpha1
      - k8s.io/kubernetes/pkg/apis/discovery/v1beta1
      - k8s.io/kubernetes/pkg/apis/events
      - k8s.io/kubernetes/pkg/apis/events/install
      - k8s.io/kubernetes/pkg/apis/events/v1beta1

		{ // case 2, with Istiod instance
			args:           []string{"adsz"},
			expectedString: "",
		},
	}
	multixds.GetXdsResponse = func(_ *discovery.DiscoveryRequest, _ string, _ string, _ clioptions.CentralControlPlaneOptions, _ []grpc.DialOption,
	) (*discovery.DiscoveryResponse, error) {
		return &discovery.DiscoveryResponse{}, nil
	}
	t.Cleanup(func() {
		multixds.GetXdsResponse = xds.GetXdsResponse
	})

	for i, c := range cases {

	hpaClient := controllerContext.ClientBuilder.ClientOrDie("horizontal-pod-autoscaler")

	apiVersionsGetter := custom_metrics.NewAvailableAPIsGetter(hpaClient.Discovery())
	// invalidate the discovery information roughly once per resync interval our API
	// information is *at most* two resync intervals old.
	go custom_metrics.PeriodicallyInvalidate(
		apiVersionsGetter,

```bash
iop istio-control istio-discovery $IBASE/istio-control/istio-discovery \
            --set global.istioNamespace=istio-system

# Second istio-discovery, using master version of istio
TAG=latest HUB=gcr.io/istio-testing iop istio-master istio-discovery-master $IBASE/istio-control/istio-discovery \
            --set policy.enable=false \

See the License for the specific language governing permissions and
limitations under the License.
*/

package apiserver

import (
	"k8s.io/apiserver/pkg/endpoints/discovery"
	genericapiserver "k8s.io/apiserver/pkg/server"
)

type completedConfig struct {
	Generic genericapiserver.CompletedConfig
	*Extra
}

// See the License for the specific language governing permissions and
// limitations under the License.

package xds

import (
	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"

	"istio.io/istio/pilot/pkg/model"
	"istio.io/istio/pilot/pkg/networking/core"
	"istio.io/istio/pilot/pkg/util/protoconv"
	"istio.io/istio/pkg/config/schema/kind"

)

// Interface is from "k8s.io/apiserver/pkg/endpoints/handlers/negotiation"

// DiscoveryEndpointRestrictions allows requests to /apis to provide a Content Negotiation GVK for aggregated discovery.
var DiscoveryEndpointRestrictions = discoveryEndpointRestrictions{}

type discoveryEndpointRestrictions struct{}

		SetDefaults_APIEndpoint(&obj.LocalAPIEndpoint)
	}
}

// SetDefaults_Discovery assigns default values for the discovery process
func SetDefaults_Discovery(obj *Discovery) {
	if len(obj.TLSBootstrapToken) == 0 && obj.BootstrapToken != nil {
		obj.TLSBootstrapToken = obj.BootstrapToken.Token
	}

	if obj.Timeout == nil {
		obj.Timeout = &metav1.Duration{
			Duration: DefaultDiscoveryTimeout,
		}
	}

// limitations under the License.

package xds

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/url"
	"strconv"

	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	anypb "google.golang.org/protobuf/types/known/anypb"

	"istio.io/istio/pilot/pkg/model"

// SetDefaults_Discovery assigns default values for the discovery process
func SetDefaults_Discovery(obj *Discovery) {
	if len(obj.TLSBootstrapToken) == 0 && obj.BootstrapToken != nil {
		obj.TLSBootstrapToken = obj.BootstrapToken.Token
	}

	if obj.File != nil {
		SetDefaults_FileDiscovery(obj.File)
	}
}

// SetDefaults_FileDiscovery assigns default values for file based discovery
func SetDefaults_FileDiscovery(obj *FileDiscovery) {