at two levels. For distributing workload certificates, Envoy will send [SDS](https://www.envoyproxy.io/docs/envoy/latest/configuration/security/secret)
requests to the agent, causing the agent to submit a CSR to the configured CA (generally Istiod). For other configuration,

{
 "configs": [
  {
   "@type": "type.googleapis.com/envoy.admin.v3.RoutesConfigDump",
   "static_route_configs": [
    {
     "route_config": {
      "@type": "type.googleapis.com/envoy.config.route.v3.RouteConfiguration",
      "virtual_hosts": [
       {
        "name": "backend",
        "domains": [
         "*"
        ],
        "routes": [
         {
          "match": {
           "prefix": "/healthz/ready"
          },

{
 "configs": [
  {
   "@type": "type.googleapis.com/envoy.admin.v3.RoutesConfigDump",
   "static_route_configs": [
    {
     "route_config": {
      "@type": "type.googleapis.com/envoy.config.route.v3.RouteConfiguration",
      "virtual_hosts": [
       {
        "name": "backend",
        "domains": [
         "*"
        ],
        "routes": [
         {
          "match": {
           "prefix": "/stats/prometheus"

            "@type": "type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.Secret",
            "name": "ROOTCA",
            "validation_context": {
              "trusted_ca": {
              },
              "custom_validator_config": {
                "name": "envoy.tls.cert_validator.spiffe",
                "typed_config": {

  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

{
  "configs": [
    {
      "@type": "type.googleapis.com/envoy.admin.v3.SecretsConfigDump",
      "dynamic_active_secrets": [
        {
          "name": "default",
          "last_updated": "2023-05-15T01:32:52.262Z",
          "secret": {
            "@type": "type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.Secret",
            "name": "default",
            "tls_certificate": {
              "certificate_chain": {

including Citadel (acting as Certificate Authority), citadel agent, etc.

- [istio/proxy](https://github.com/istio/proxy). The Istio proxy contains
extensions to the [Envoy proxy](https://github.com/envoyproxy/envoy) (in the form of
Envoy filters) that support authentication, authorization, and telemetry collection.

- [istio/ztunnel](https://github.com/istio/ztunnel). The repository contains the Rust implementation of the ztunnel

package configdump

import (
	"encoding/json"
	"fmt"
	"sort"
	"strconv"
	"strings"
	"text/tabwriter"

	core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
	endpoint "github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3"
	"google.golang.org/protobuf/types/known/anypb"
	"sigs.k8s.io/yaml"

	"istio.io/istio/istioctl/pkg/util/proto"
	"istio.io/istio/pilot/pkg/networking/util"

### Pilot Integration Tests

- **Location**: `tests/integration/pilot`
- **Purpose**: Tests related to the Istio Pilot component, which is responsible for configuring the Envoy proxies.
- **Focus**:
  1. Configuration of Envoy proxies by Pilot.
  1. Communication between Pilot and Envoy proxies.
  1. Validation of service discovery.
  1. Testing of traffic management policies (e.g., routing, retries, timeouts).

package pilot

import (
	"bytes"
	"encoding/json"
	"os"
	"testing"

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

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