// +optional
  optional string restartPolicy = 3;

  // Optional duration in seconds the carp needs to terminate gracefully. May be decreased in delete request.
  // Value must be non-negative integer. The value zero indicates delete immediately.
  // If this value is nil, the default grace period will be used instead.
  // The grace period is the duration in seconds after the processes running in the carp are sent

  //   * increase no more than 4 pods per 60 seconds
  //   * double the number of pods per 60 seconds
  // No stabilization is used.
  // +optional
  optional HPAScalingRules scaleUp = 1;

  // scaleDown is scaling policy for scaling Down.
  // If not set, the default value is to allow to scale down to minReplicas pods, with a
  // 300 second stabilization window (i.e., the highest recommendation for

  meshConfig:
    defaultConfig:
      proxyMetadata: {}

  # This value defines:
  # 1. how many seconds kube waits for ztunnel pod to gracefully exit before forcibly terminating it (this value)
  # 2. how many seconds ztunnel waits to drain its own connections (this value - 1 sec)
  # Default K8S value is 30 seconds
  terminationGracePeriodSeconds: 30

  optional ProbeHandler handler = 1;

  // Number of seconds after the container has started before liveness probes are initiated.
  // More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle#container-probes
  // +optional
  optional int32 initialDelaySeconds = 2;

  // Number of seconds after which the probe times out.
  // Defaults to 1 second. Minimum value is 1.

  //   * increase no more than 4 pods per 60 seconds
  //   * double the number of pods per 60 seconds
  // No stabilization is used.
  // +optional
  optional HPAScalingRules scaleUp = 1;

  // scaleDown is scaling policy for scaling Down.
  // If not set, the default value is to allow to scale down to minReplicas pods, with a
  // 300 second stabilization window (i.e., the highest recommendation for

  // The deployment strategy to use to replace existing pods with new ones.
  // +optional
  // +patchStrategy=retainKeys
  optional DeploymentStrategy strategy = 4;

  // minReadySeconds is the minimum number of seconds for which a newly created pod should be ready
  // without any of its container crashing, for it to be considered available.
  // Defaults to 0 (pod will be considered available as soon as it is ready)
  // +optional

      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },
          "expr": "(sum(irate(container_cpu_usage_seconds_total{pod=~\"istio-ingressgateway-.*\",container=\"istio-proxy\"}[1m])) / (round(sum(irate(istio_requests_total{source_workload=\"istio-ingressgateway\", reporter=\"source\"}[1m])), 0.001)/1000))",
          "format": "time_series",

          "format": "table",

  // object refers to a metric describing a single kubernetes object
  // (for example, hits-per-second on an Ingress object).
  // +optional
  optional ObjectMetricSource object = 2;

  // pods refers to a metric describing each pod in the current scale target
  // (for example, transactions-processed-per-second).  The values will be
  // averaged together before being compared to the target value.
  // +optional

	v1 "k8s.io/api/core/v1"

	"istio.io/istio/pkg/monitoring"
	"istio.io/istio/pkg/spiffe"
	"istio.io/istio/pkg/zdsapi"
)

var (
	ztunnelKeepAliveCheckInterval = 5 * time.Second
	readWriteDeadline             = 5 * time.Second
)

var ztunnelConnected = monitoring.NewGauge("ztunnel_connected",
	"number of connections to ztunnel")

type ZtunnelServer interface {
	Run(ctx context.Context)