- [readiness probes](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)
- [replica count](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/)
- [HorizontalPodAutoscaler](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/)

"targets": [ { "expr": "sum(container_memory_working_set_bytes{pod=~\"istio-ingressgateway-.*\"}) / count(container_memory_working_set_bytes{pod=~\"istio-ingressgateway-.*\",container!=\"POD\"})", "format": "time_series", "intervalFactor": 1, "legendFormat": "per istio-ingressgateway", "refId": "A" }, { "expr": "sum(container_memory_working_set_bytes{namespace!=\"istio-system\",container=\"istio-proxy\"}) / count(container_memory_working_set_bytes{namespace!=\"istio-system\",container=\"istio-proxy\"})",...

                                  Valid Options: ALL_METRICS, REQUEST_COUNT, REQUEST_DURATION, REQUEST_SIZE, RESPONSE_SIZE, TCP_OPENED_CONNECTIONS, TCP_CLOSED_CONNECTIONS, TCP_SENT_BYTES, TCP_RECEIVED_BYTES, GRPC_REQUEST_MESSAGES, GRPC_RESPONSE_MESSAGES
                                enum:
                                - ALL_METRICS
                                - REQUEST_COUNT
                                - REQUEST_DURATION

  // metrics contains the specifications for which to use to calculate the
  // desired replica count (the maximum replica count across all metrics will
  // be used).  The desired replica count is calculated multiplying the
  // ratio between the target value and the current value by the current
  // number of pods.  Ergo, metrics used must decrease as the pod count is
  // increased, and vice-versa.  See the individual metric source types for

  // metrics contains the specifications for which to use to calculate the
  // desired replica count (the maximum replica count across all metrics will
  // be used).  The desired replica count is calculated multiplying the
  // ratio between the target value and the current value by the current
  // number of pods.  Ergo, metrics used must decrease as the pod count is
  // increased, and vice-versa.  See the individual metric source types for

  // information.
  // +optional
  optional string message = 2;
}

// VolumeNodeResources is a set of resource limits for scheduling of volumes.
message VolumeNodeResources {
  // count indicates the maximum number of unique volumes managed by the CSI driver that can be used on a node.
  // A volume that is both attached and mounted on a node is considered to be used once, not twice.

  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time lastTimestamp = 7;

  // The number of times this event has occurred.
  // +optional
  optional int32 count = 8;

  // Type of this event (Normal, Warning), new types could be added in the future
  // +optional
  optional string type = 9;

  // Time when this Event was first observed.
  // +optional

			countVersions(versionCount, configVersion.ListenerVersion)
			countVersions(versionCount, configVersion.EndpointVersion)
		}
	}

	for version, count := range versionCount {
		if slices.Contains(acceptedVersions, version) {
			present += count
		} else {
			notpresent += count
		}
	}
	return present, notpresent, sdcnum, nil
}

// getAndWatchResource ensures that Generations always contains

	}

	// Return the shortest non-numeric domain.  Count of domains seems uninteresting.
	max := 2
	withoutPort := make([]string, 0, len(domains))
	for _, d := range domains {
		if !strings.Contains(d, ":") {
			withoutPort = append(withoutPort, d)
			// if the domain contains IPv6, such as [fd00:10:96::7fc7] and [fd00:10:96::7fc7]:8090
		} else if strings.Count(d, ":") > 2 {

  // daemon pod and have none of the daemon pod running and available
  // (ready for at least spec.minReadySeconds)
  // +optional
  optional int32 numberUnavailable = 8;

  // Count of hash collisions for the DaemonSet. The DaemonSet controller
  // uses this field as a collision avoidance mechanism when it needs to
  // create the name for the newest ControllerRevision.
  // +optional