apiVersion: opentelemetry.io/v1beta1
kind: OpenTelemetryCollector
metadata:
  name: otel-gateway
  namespace: opentelemetry-operator-system
spec:
  mode: deployment
  replicas: 1 
  serviceAccount: otel-gateway-collector # Operator 会自动创建并绑定权限
  config:
    receivers:
      otlp:
        protocols:
          grpc:
            endpoint: 0.0.0.0:4317
          http:
            endpoint: 0.0.0.0:4318
      
      # --- 核心：采集 K8s 集群状态指标 ---
      # 采集 Deployment, DaemonSet, StatefulSet, HPA, Node 等资源的状态
      k8s_cluster:
        collection_interval: 30s
        node_conditions_to_report: [Ready, MemoryPressure, DiskPressure, PIDPressure]
        allocatable_types_to_report: [cpu, memory]

    processors:
      batch:
        send_batch_size: 1000
        timeout: 10s
      memory_limiter:
        check_interval: 1s
        limit_percentage: 70
        spike_limit_percentage: 30
      
      # 增加 K8s 元数据标签 (这也是 Gateway 的重要作用)
      k8sattributes:
        extract:
          metadata:
            - k8s.namespace.name
            - k8s.pod.name
            - k8s.deployment.name
            - k8s.statefulset.name
            - k8s.daemonset.name
            - k8s.cronjob.name
            - k8s.job.name
            - k8s.node.name
        pod_association:
          - sources:
            - from: resource_attribute
              name: k8s.pod.ip
          - sources:
            - from: resource_attribute
              name: k8s.pod.uid
          - sources:
            - from: connection

    exporters:
      # 1. 导出 Metrics 到外部 Prometheus (使用 Remote Write)
      prometheusremotewrite:
        endpoint: "http://10.0.0.38:9090/api/v1/write"
        # 如果有 Basic Auth，在此配置
        # external_labels:
        #   cluster: "test-k8s-cluster" 

      # 2. 导出 Traces 到外部 Tempo (使用 OTLP gRPC)
      # otlp/tempo:
      #   endpoint: "<你的TEMPO_IP>:4317" 
      #   tls:
      #     insecure: true

      # 3. 导出 Logs 到外部 Elasticsearch (可选)
      # elasticsearch:
      #   endpoints: ["http://<你的ES_IP>:9200"]
      #   logs_index: "k8s-logs"

      debug:
        verbosity: basic

    service:
      pipelines:
        metrics:
          receivers: [otlp, k8s_cluster]
          processors: [memory_limiter, batch] 
          # 确保 k8sattributes 在 batch 之前或之后取决于架构，Gateway通常主要做转发
          # 这里 k8s_cluster 产生的数据自带标签，otlp 来的数据应在 Agent 端打好标签
          exporters: [prometheusremotewrite]
        
        traces:
          receivers: [otlp]
          processors: [memory_limiter, batch]
          exporters: [otlp/tempo]

        # logs:
        #   receivers: [otlp]
        #   processors: [memory_limiter, batch]
        #   exporters: [elasticsearch]