services:
  otel-collector:
    image: otel/opentelemetry-collector-contrib:latest
    container_name: otel-collector
    command: ["--config=/etc/otelcol/config.yaml"]
    configs:
      - source: otel-collector-config
        target: /etc/otelcol/config.yaml
    ports:
      - "4317:4317" # OTLP gRPC
      - "4318:4318" # OTLP HTTP
      - "8888:8888" # Collector /metrics
      - "9464:9464" # Prometheus scrape endpoint
      - "13133:13133" # Health check
      - "1777:1777" # pprof
      - "55679:55679" # zpages
    restart: unless-stopped
    depends_on:
      - tempo

  tempo:
    image: grafana/tempo:latest
    container_name: tempo
    command: ["-config.file=/etc/tempo.yaml"]
    configs:
      - source: tempo-config
        target: /etc/tempo.yaml
    ports:
      - "3200:3200" # tempo HTTP/gRPC API (multiplexed)
    expose:
      - "4317" # OTLP gRPC (internal)
    volumes:
      - tempo-data:/var/tempo
    restart: unless-stopped

  prometheus:
    image: prom/prometheus:latest
    container_name: prometheus
    depends_on:
      - otel-collector
    command:
      - "--config.file=/etc/prometheus/prometheus.yml"
      - "--storage.tsdb.path=/prometheus"
      - "--web.console.libraries=/usr/share/prometheus/console_libraries"
      - "--web.console.templates=/usr/share/prometheus/consoles"
      - "--web.enable-remote-write-receiver"
    ports:
      - "9090:9090"
    volumes:
      - prometheus-data:/prometheus
    configs:
      - source: prometheus-config
        target: /etc/prometheus/prometheus.yml
    restart: unless-stopped

  grafana:
    image: grafana/grafana:latest
    container_name: grafana
    depends_on:
      - prometheus
      - tempo
    environment:
      GF_SECURITY_ADMIN_USER: admin
      GF_SECURITY_ADMIN_PASSWORD: admin
      GF_AUTH_ANONYMOUS_ENABLED: "true"
      GF_AUTH_ANONYMOUS_ORG_ROLE: Viewer
      GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS: "grafana-pyroscope-app,grafana-exploretraces-app,grafana-metricsdrilldown-app"
      GF_PLUGINS_ENABLE_ALPHA: "true"
      GF_INSTALL_PLUGINS: ""
      GF_LOG_LEVEL: "warn"
      GF_FEATURE_TOGGLES_ENABLE: ""
    ports:
      - "4000:3000"
    volumes:
      - grafana-data:/var/lib/grafana
    configs:
      - source: grafana-datasources
        target: /etc/grafana/provisioning/datasources/datasources.yml
    restart: unless-stopped

configs:
  otel-collector-config:
    content: |
      receivers:
        otlp:
          protocols:
            grpc:
              endpoint: 0.0.0.0:4317
            http:
              endpoint: 0.0.0.0:4318

      processors:
        batch:

      exporters:
        prometheus:
          endpoint: 0.0.0.0:9464
          namespace: otel
          const_labels:
            source: otelcol
            
        otlp/tempo:
          endpoint: tempo:4317
          tls:
            insecure: true
            
        debug:
          verbosity: detailed

      extensions:
        health_check:
          endpoint: 0.0.0.0:13133
        pprof:
          endpoint: 0.0.0.0:1777
        zpages:
          endpoint: 0.0.0.0:55679

      service:
        extensions: [health_check, pprof, zpages]
        telemetry:
          logs:
            level: debug
          metrics:
            level: detailed
        pipelines:
          traces:
            receivers: [otlp]
            processors: [batch]
            exporters: [debug, otlp/tempo]
          metrics:
            receivers: [otlp]
            processors: [batch]
            exporters: [debug, prometheus]
          logs:
            receivers: [otlp]
            processors: [batch]
            exporters: [debug]

  tempo-config:
    content: |
      server:
        http_listen_port: 3200
        grpc_listen_port: 3201
        log_level: info

      distributor:
        receivers:
          otlp:
            protocols:
              grpc:
                endpoint: 0.0.0.0:4317

      ingester:
        max_block_duration: 5m
        trace_idle_period: 10s

      compactor:
        compaction:
          block_retention: 1h

      storage:
        trace:
          backend: local
          wal:
            path: /var/tempo/wal
          local:
            path: /var/tempo/blocks

      metrics_generator:
        registry:
          external_labels:
            source: tempo
        storage:
          path: /var/tempo/generator/wal
          remote_write:
            - url: http://prometheus:9090/api/v1/write

  prometheus-config:
    content: |
      global:
        scrape_interval: 15s
      scrape_configs:
        - job_name: "otelcol-internal"
          static_configs:
            - targets: ["otel-collector:8888"]
        - job_name: "otelcol-exporter"
          static_configs:
            - targets: ["otel-collector:9464"]
        - job_name: "tempo"
          static_configs:
            - targets: ["tempo:3200"]

  grafana-datasources:
    content: |
      apiVersion: 1
      datasources:
        - name: Prometheus
          uid: prometheus
          type: prometheus
          access: proxy
          orgId: 1
          url: http://prometheus:9090
          isDefault: true
          editable: true
        - name: Tempo
          uid: tempo
          type: tempo
          access: proxy
          orgId: 1
          url: http://tempo:3200
          editable: true
          jsonData:
            nodeGraph:
              enabled: true
            tracesToLogs:
              datasourceUid: prometheus
            tracesToMetrics:
              datasourceUid: prometheus
            serviceMap:
              datasourceUid: prometheus
            search:
              hide: false
            lokiSearch:
              datasourceUid: prometheus

volumes:
  prometheus-data:
  grafana-data:
  tempo-data: