2.5. kubelet Stats Receiver

Kubelet Stats Receiver 从 kubelet 的 API 服务器中提取与节点、Pod、容器和卷相关的指标。然后，这些指标通过 metrics-processing 管道进行额外的分析。

启用了 Kubelet Stats Receiver 的 OpenTelemetry Collector 自定义资源

# ...
  config:
    receivers:
      kubeletstats:
        collection_interval: 20s
        auth_type: "serviceAccount"
        endpoint: "https://${env:K8S_NODE_NAME}:10250"
        insecure_skip_verify: true
    service:
      pipelines:
        metrics:
          receivers: [kubeletstats]
  env:
    - name: K8S_NODE_NAME 
      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName
# ...

# ...
  config:
    receivers:
      kubeletstats:
        collection_interval: 20s
        auth_type: "serviceAccount"
        endpoint: "https://${env:K8S_NODE_NAME}:10250"
        insecure_skip_verify: true
    service:
      pipelines:
        metrics:
          receivers: [kubeletstats]
  env:
    - name: K8S_NODE_NAME


      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName
# ...

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1: 设置 K8S_NODE_NAME 以向 API 进行身份验证。

对于用于运行 OpenTelemetry Collector 的服务帐户，Kubelet Stats Receiver 需要额外权限。

服务帐户所需的权限

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: otel-collector
rules:
  - apiGroups: ['']
    resources: ['nodes/stats']
    verbs: ['get', 'watch', 'list']
  - apiGroups: [""]
    resources: ["nodes/proxy"] 
    verbs: ["get"]
# ...

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: otel-collector
rules:
  - apiGroups: ['']
    resources: ['nodes/stats']
    verbs: ['get', 'watch', 'list']
  - apiGroups: [""]
    resources: ["nodes/proxy"]


    verbs: ["get"]
# ...

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1: 使用 extra_metadata_labels 或 request_utilization 或 limit_utilization 指标时所需的权限。

2.5. kubelet Stats Receiver

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