istioctl experimental envoy-stats <pod-name[.namespace]>

  # Retrieve Envoy server metrics in prometheus format
  istioctl experimental envoy-stats <pod-name[.namespace]> --output prom

  # Retrieve Envoy server metrics in prometheus format with custom proxy admin port
  istioctl experimental envoy-stats <pod-name[.namespace]> --output prom --proxy-admin-port 15000

func TestPrint(t *testing.T) {
	a := &Analyzer{
		listenerDump: &envoy_admin.ListenersConfigDump{
			DynamicListeners: []*envoy_admin.ListenersConfigDump_DynamicListener{
				{
					Name: "10.102.11.148_15021",
					ActiveState: &envoy_admin.ListenersConfigDump_DynamicListenerState{
						VersionInfo: "2023-06-20T09:07:41Z/3",
						Listener: &anypb.Any{
							TypeUrl: "type.googleapis.com/envoy.config.listener.v3.Listener",
						},

                                  "factory_key": "envoy.string"
                                }
                              ]
                            }
                          },
                          {
                            "name": "envoy.filters.http.router",
                            "typed_config": {
                              "@type": "type.googleapis.com/envoy.extensions.filters.http.router.v3.Router"

// limitations under the License.

package compare

import (
	"encoding/json"
	"fmt"
	"io"
	"strings"

	admin "github.com/envoyproxy/go-control-plane/envoy/admin/v3"
	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
	legacyproto "github.com/golang/protobuf/proto" // nolint: staticcheck
	exprpb "google.golang.org/genproto/googleapis/api/expr/v1alpha1"

	"io"
	"strings"
	"text/tabwriter"

	adminv3 "github.com/envoyproxy/go-control-plane/envoy/admin/v3"
	"sigs.k8s.io/yaml"

	"istio.io/istio/istioctl/pkg/util/configdump"
	sdscompare "istio.io/istio/istioctl/pkg/writer/compare/sds"
	"istio.io/istio/pkg/util/protomarshal"
)

// ConfigWriter is a writer for processing responses from the Envoy Admin config_dump endpoint
type ConfigWriter struct {
	Stdout     io.Writer

)

// ClusterDiff prints a diff between Istiod and Envoy clusters to the passed writer
func (c *Comparator) ClusterDiff() error {
	envoyBytes, istiodBytes := &bytes.Buffer{}, &bytes.Buffer{}
	envoyClusterDump, err := c.envoy.GetDynamicClusterDump(true)
	if err != nil {
		envoyBytes.WriteString(err.Error())
	} else {
		envoy, err := protomarshal.ToJSONWithAnyResolver(envoyClusterDump, "    ", &envoyResolver)

                                  "factory_key": "envoy.string"
                                }
                              ]
                            }
                          },
                          {
                            "name": "envoy.filters.http.router",
                            "typed_config": {
                              "@type": "type.googleapis.com/envoy.extensions.filters.http.router.v3.Router"

		Long: `
Retrieves last sent and last acknowledged xDS sync from Istiod to each Envoy in the mesh
`,
		Example: `  # Retrieve sync status for all Envoys in a mesh
  istioctl proxy-status

  # Retrieve sync status for Envoys in a specific namespace
  istioctl proxy-status --namespace foo

  # Retrieve sync diff for a single Envoy and Istiod

)

// ListenerDiff prints a diff between Istiod and Envoy listeners to the passed writer
func (c *Comparator) ListenerDiff() error {
	envoyBytes, istiodBytes := &bytes.Buffer{}, &bytes.Buffer{}
	envoyListenerDump, err := c.envoy.GetDynamicListenerDump(true)
	if err != nil {
		envoyBytes.WriteString(err.Error())
	} else {
		envoy, err := protomarshal.ToJSONWithAnyResolver(envoyListenerDump, "    ", &envoyResolver)

		CommandLong:  `Open the Envoy admin dashboard for a sidecar`,
		CommandExample: `  # Open Envoy dashboard for the productpage-123-456.default pod
  istioctl dashboard envoy productpage-123-456.default

  # Open Envoy dashboard for one pod under a deployment
  istioctl dashboard envoy deployment/productpage-v1

  # with short syntax
  istioctl dash envoy productpage-123-456.default
  istioctl d envoy productpage-123-456.default
`,