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Otel - kubeletstats

This dashboard shows important information from pods running in a kubernetes cluster. It relies on metrics collected using Otel’s Kubelet Stats receiver and Otel’s Kubernetes cluster receiver. The following snippet shows an OpenTelemetry collector’s configuration that should scrape the metrics required by this dashboard:

receivers:
  kubeletstats:
    auth_type: serviceAccount
    collection_interval: 20s
    endpoint: https://${env:OTEL_K8S_NODE_NAME}:10250
    extra_metadata_labels:
    - k8s.volume.type
    insecure_skip_verify: true
    metric_groups:
    - container
    - pod
    - volume
    - node
  k8s_cluster:
    allocatable_types_to_report:
    - cpu
    - memory
    - storage
    - ephemeral-storage
    collection_interval: 15s
    node_conditions_to_report:
    - Ready
    - MemoryPressure
processors:
  resource/remove_container_id:
    attributes:
    - action: delete
      key: container.id
    - action: delete
      key: container_id
exporters:
  prometheusremotewrite/local:
    endpoint: http://prometheus-server/api/v1/write
    resource_to_telemetry_conversion:
      enabled: true
service:
  extensions:
  - health_check
  - memory_ballast
  pipelines
    metrics:
      exporters:
      - prometheusremotewrite/local
      processors:
      - resource/remove_container_id
      receivers:
      - kubeletstats
      - k8s_cluster

Two things from that config snippet should be explained further:

  • container_id label is removed from metrics. The biggest reason why this is done is because, when containers get restarted, they will create a new time series (because container_id labe is different). This demands more resources from prometheus and would break some panels (like rate(containers_restart))
  • prometheusremotewrite exporter enables resource_to_telemetry_conversion is required to export existing attributes as prometheus labels.

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