clusterConfigCmd.PersistentFlags().StringVar(&fqdn, "fqdn", "", "Filter clusters by substring of Service FQDN field")
	clusterConfigCmd.PersistentFlags().StringVar(&direction, "direction", "", "Filter clusters by Direction field")
	clusterConfigCmd.PersistentFlags().StringVar(&subset, "subset", "", "Filter clusters by substring of Subset field")
	clusterConfigCmd.PersistentFlags().IntVar(&port, "port", 0, "Filter clusters by Port field")

	"istio.io/istio/pkg/config/host"
)

// ClusterFilter is used to pass filter information into cluster based config writer print functions
type ClusterFilter struct {
	FQDN      host.Name
	Port      int
	Subset    string
	Direction model.TrafficDirection
}

// Verify returns true if the passed cluster matches the filter fields
func (c *ClusterFilter) Verify(cluster *cluster.Cluster) bool {
	name := cluster.Name

https://istio.io/docs/reference/config/networking/envoy-filter.html' properties: configPatches: description: One or more patches with match conditions. items: properties: applyTo: description: Specifies where in the Envoy configuration, the patch should be applied. enum: - INVALID - LISTENER - FILTER_CHAIN - NETWORK_FILTER - HTTP_FILTER - ROUTE_CONFIGURATION - VIRTUAL_HOST - HTTP_ROUTE - CLUSTER - EXTENSION_CONFIG - BOOTSTRAP - LISTENER_FILTER type: string match: description: Match on listener/route...

  // you made the request against.  If empty, it is defaulted.
  optional SubjectAccessReviewSpec spec = 2;

  // Status is filled in by the server and indicates whether the request is allowed or not
  // +optional
  optional SubjectAccessReviewStatus status = 3;
}

	// this can happen if the pod was dynamically added to the mesh after it was created.
	// in that case, try finding the netns using procfs.
	filter := map[types.UID]*corev1.Pod{
		pod.UID: pod,
	}
	return s.scanProcForPodsAndCache(filter)
}

func (s *NetServer) getOrOpenNetns(pod *corev1.Pod, netNs string) (Netns, error) {
	if netNs == "" {
		return s.getNetns(pod)
	}
	return s.openNetns(pod, netNs)

package cmd

import (
	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
)

var helpFlags = map[string]bool{
	"log_as_json":          true,
	"log_stacktrace_level": true,
	"log_target":           true,
	"log_caller":           true,
	"log_output_level":     true,
	// istioctl also inherits support for log_rotate, log_rotate_max_age, log_rotate_max_backups,

             503
            ]
           },
           "cluster_not_found_response_code": "INTERNAL_SERVER_ERROR",
           "max_grpc_timeout": "0s"
          },
          "metadata": {
           "filter_metadata": {
            "istio": {
             "config": "/apis/networking.istio.io/v1alpha3/namespaces/default/virtual-service/http-0-istio-autogenerated-k8s-gateway"
            }
           }
          },

      maxUnavailable: {{ $gateway.rollingMaxUnavailable }}
  template:
    metadata:
      labels:
{{ $gateway.labels | toYaml | indent 8 }}
{{- if eq .Release.Namespace "istio-system"}}
        heritage: Tiller
        release: istio
        chart: gateways
{{- end }}
        service.istio.io/canonical-name: {{ $gateway.name }}

            (has(object.spec.metrics) ? object.spec.metrics : {}).exists(m, has(m.reportingInterval)) ||
            (has(object.spec.accessLogging) ? object.spec.accessLogging : {}).exists(l, has(l.filter))
          )
        )
---
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: "stable-channel-default-policy-binding.istio.io"
spec:

func getLinkWithDestinationOf(ip string) (netlink.Link, error) {
	routes, err := netlink.RouteListFiltered(
		netlink.FAMILY_V4,
		&netlink.Route{Dst: &net.IPNet{IP: net.ParseIP(ip), Mask: net.CIDRMask(32, 32)}},
		netlink.RT_FILTER_DST)
	if err != nil {
		return nil, err
	}

	if len(routes) == 0 {
		return nil, fmt.Errorf("no routes found for %s", ip)
	}

	linkIndex := routes[0].LinkIndex
	return netlink.LinkByIndex(linkIndex)
}