args:           strings.Split("--revision canary", " "),
			expectedString: "NAME     CLUSTER     CDS     LDS     EDS     RDS     ECDS     ISTIOD",
			revision:       "canary",
		},
		{ // case 7: supplying type that doesn't select pods should fail
			args:          strings.Split("serviceaccount/sleep", " "),
			wantException: true,
		},
	}

	// init container termination message and exit code.
	SidecarAnnotation  string
	InitContainerName  string
	InitTerminationMsg string
	InitExitCode       int

	// Label and field selectors to select pods managed by race repair.
	LabelSelectors string
	FieldSelectors string
}

func (c InstallConfig) String() string {
	var b strings.Builder
	b.WriteString("CNINetDir: " + c.CNINetDir + "\n")

	ret := make(chan updateResponse, 1)
	req := updateRequest{
		Update: data,
		Fd:     fd,
		Resp:   ret,
	}
	select {
	case z.Updates <- req:
	case <-ctx.Done():
		return nil, ctx.Err()
	}

	select {
	case r := <-ret:
		return r.resp, r.err
	case <-ctx.Done():
		return nil, ctx.Err()
	}
}

		false, "Compare directory.")
	cmd.PersistentFlags().BoolVarP(&diffArgs.verbose, "verbose", "v",
		false, "Verbose output.")
	cmd.PersistentFlags().StringVar(&diffArgs.selectResources, "select", "::",
		"Constrain the list of resources to compare to only the ones in this list, ignoring all others.\n"+

  istioctl x internal-debug syncz --xds-address istio.example.com:15012 --cert-dir ~/.istio-certs

  # Retrieve syncz information via XDS from specific control plane in multi-control plane in-cluster configuration
  # (Select a specific control plane in an in-cluster canary Istio configuration.)
  istioctl x internal-debug syncz --xds-label istio.io/rev=default
`,
		RunE: func(c *cobra.Command, args []string) error {

  istioctl ps --xds-address istio.example.com:15012 --cert-dir ~/.istio-certs

  # Retrieve proxy status information via XDS from specific control plane in multi-control plane in-cluster configuration
  # (Select a specific control plane in an in-cluster canary Istio configuration.)
  istioctl ps --xds-label istio.io/rev=default
`,
		Aliases: []string{"ps"},
		RunE: func(c *cobra.Command, args []string) error {

  //     "kubernetes.io/kubelet-serving".
  //  3. Otherwise, it is assigned "kubernetes.io/legacy-unknown".
  // Distribution of trust for signers happens out of band.
  // You can select on this field using `spec.signerName`.
  // +optional
  optional string signerName = 7;

  // expirationSeconds is the requested duration of validity of the issued

  // Label query over pods whose evictions are managed by the disruption
  // budget.
  // A null selector will match no pods, while an empty ({}) selector will select
  // all pods within the namespace.
  // +patchStrategy=replace
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 2;

    # ID post-install.
    #
    # If the mesh admin does not specify a value, Istio will use the value of the
    # mesh's Trust Domain. The best practice is to select a proper Trust Domain
    # value.
    meshID: ""

    # Configure the mesh networks to be used by the Split Horizon EDS.
    #

However, this means anytime a workload changes (often), we need to update the policy.

Instead, the opposite was chosen: each workload will list the policies that select it.
This works out to be more efficient in common cases where policies change much less often than workloads.