istioctl proxy-config clusters <pod-name[.namespace]>

  # Retrieve cluster summary for clusters with port 9080.
  istioctl proxy-config clusters <pod-name[.namespace]> --port 9080

  # Retrieve full cluster dump for clusters that are inbound with a FQDN of details.default.svc.cluster.local.

	// max clusters doesn't check kube only, the test may be written in a way that doesn't loop over all of Clusters()
	if t.requiredMaxClusters > 0 && len(t.s.Environment().Clusters()) > t.requiredMaxClusters {
		t.goTest.Skipf("Skipping %q: number of clusters %d is above required max %d",
			t.goTest.Name(), len(t.s.Environment().Clusters()), t.requiredMaxClusters)
		return
	}

	if t.minKubernetesMinorVersion > 0 {
		for _, c := range ctx.Clusters() {

	// RequireMinClusters ensures that the current environment contains at least the given number of clusters.
	// Otherwise it stops test execution.
	//
	// Deprecated: Tests should not make assumptions about number of clusters.
	RequireMinClusters(minClusters int) Suite
	// RequireMaxClusters ensures that the current environment contains at least the given number of clusters.
	// Otherwise it stops test execution.
	//

        path: %s
        pathType: Prefix
`

			successChecker := check.And(check.OK(), check.ReachedClusters(t.AllClusters(), apps.B.Clusters()))
			failureChecker := check.Status(http.StatusNotFound)
			count := 2 * t.Clusters().Len()

			// TODO check all clusters were hit
			cases := []struct {
				name       string
				path       string
				prefixPath string
				call       echo.CallOptions
			}{

											expectedClusters := to.Clusters().ForNetworks(from.Config().Cluster.NetworkName())
											if !check.IsDNSCaptureEnabled(t) && opts.To.Config().Headless {
												opts.Check = check.And(opts.Check, check.ReachedSourceCluster(t.Clusters()))
											} else {
												opts.Check = check.And(opts.Check, check.ReachedClusters(t.Clusters(), expectedClusters))
											}
										} else {

	}
}

// normalizeClusters normalizes clusters to avoid duplicate clusters. This should be called
// at the end before adding the cluster to list of clusters.
func (cb *ClusterBuilder) normalizeClusters(clusters []*discovery.Resource) []*discovery.Resource {
	// resolve cluster name conflicts. there can be duplicate cluster names if there are conflicting service definitions.

  }

  llvm::SmallVector<Cluster> clusters;
  for (auto &kv : root_clusters) {
    Cluster &cluster = kv.getSecond();
    // Skip degenerate clusters formed by a single basic block argument.
    if (!cluster.operations.empty()) clusters.emplace_back(std::move(cluster));
  }

  LLVM_DEBUG(llvm::dbgs() << "Found " << clusters.size() << " clusters\n");

  return clusters;
}

			clusterSpecifier.WeightedClusters.Clusters = append(clusterSpecifier.WeightedClusters.Clusters, &tcp.TcpProxy_WeightedCluster_ClusterWeight{
				Name:   clusterName,
				Weight: uint32(route.Weight),
			})
		}
	}

	// For weighted clusters set hash policy if any of the upstream destinations have sourceIP.
	maybeSetHashPolicy(destinationRule, tcpProxy, "")

		"If true, pilot will configure an additional IPv4 listener for outbound traffic in IPv6 only clusters, e.g. AWS EKS IPv6 only clusters.").Get()

	EnableAutoSni = env.Register("ENABLE_AUTO_SNI", true,
		"If enabled, automatically set SNI when `DestinationRules` do not specify the same").Get()

	VerifyCertAtClient = env.Register("VERIFY_CERTIFICATE_AT_CLIENT", true,

CNI_HASH=${CNI_HASH:-}
CNI_TAR_PREFIX=${CNI_TAR_PREFIX:-cni-plugins-linux-amd64-}
CNI_STORAGE_URL_BASE=${CNI_STORAGE_URL_BASE:-https://storage.googleapis.com/k8s-artifacts-cni/release}

# Optional: Create autoscaler for cluster's nodes.
export ENABLE_CLUSTER_AUTOSCALER=${KUBE_ENABLE_CLUSTER_AUTOSCALER:-false}
if [[ "${ENABLE_CLUSTER_AUTOSCALER}" = 'true' ]]; then
  export AUTOSCALER_MIN_NODES=${KUBE_AUTOSCALER_MIN_NODES:-}