apiVersion: opentelemetry.io/v1beta1
kind: OpenTelemetryCollector
metadata:
  name: otel-agent
  namespace: monitoring
spec:
  mode: daemonset
  image: otel/opentelemetry-collector-contrib:0.144.0
  serviceAccount: otel-collector-sa
  env:
    - name: K8S_NODE_NAME
      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName
    # --- 新增：在这里定义集群名称，Prod 环境改一下这个值即可 ---
    - name: CLUSTER_NAME
      value: "test-k8s-cluster" 
  config:
    receivers:
      hostmetrics:
        collection_interval: 30s
        scrapers:
          cpu: {}
          memory: {}
      kubeletstats:
        collection_interval: 30s
        auth_type: "serviceAccount"
        endpoint: "https://${env:K8S_NODE_NAME}:10250"
        insecure_skip_verify: true

    processors:
      batch: {}
      resourcedetection:
        detectors: [env, system, k8snode]
      
      # --- 新增：强制给所有指标打上集群名称标签 ---
      resource:
        attributes:
          - key: k8s.cluster.name
            value: ${env:CLUSTER_NAME}
            action: insert

    exporters:
      otlp:
        endpoint: "otel-gateway-collector.monitoring.svc.cluster.local:4317"
        tls:
          insecure: true

    service:
      pipelines:
        metrics:
          receivers: [hostmetrics, kubeletstats]
          # 注意：这里要加上 resource 处理器
          processors: [resourcedetection, resource, batch]
          exporters: [otlp]