// how this struct is updated on heartbeats and can guide customized reporter implementations.
message EventSeries {
  // count is the number of occurrences in this series up to the last heartbeat time.
  optional int32 count = 1;

  // lastObservedTime is the time when last Event from the series was seen before last heartbeat.

  optional int32 replicas = 1;

  // selector is a label query over pods that should match the replicas count. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
  // +optional
  // +mapType=atomic
  map<string, string> selector = 2;

  // label selector for pods that should match the replicas count. This is a serializated
  // version of both map-based and more expressive set-based selectors. This is done to

                                  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

  // Specifies the number of retries before marking this job failed.
  // Defaults to 6
  // +optional
  optional int32 backoffLimit = 7;

  // A label query over pods that should match the pod count.
  // Normally, the system sets this field for you.
  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors
  // +optional

  // 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.

        {
          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },
          "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",

- [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\"})",...

  // 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