services:
  # OpenTelemetry Collector: receives traces from Plano, derives Prometheus
  # metrics via the spanmetrics connector, and forwards traces to Tempo.
  otel-collector:
    image: otel/opentelemetry-collector-contrib:0.102.0
    command: ["--config=/etc/otel-collector-config.yaml"]
    volumes:
      - ./otel-collector-config.yaml:/etc/otel-collector-config.yaml:ro
    ports:
      - "9317:4317"   # OTLP gRPC (Plano sends traces here)
      - "8889:8889"   # Prometheus metrics endpoint (spanmetrics)
    depends_on:
      - tempo

  tempo:
    image: grafana/tempo:2.5.0
    command: ["-config.file=/etc/tempo.yaml"]
    volumes:
      - ./tempo.yaml:/etc/tempo.yaml:ro
    ports:
      - "9200:3200"   # Tempo HTTP API

  prometheus:
    image: prom/prometheus:v2.53.0
    command:
      - "--config.file=/etc/prometheus/prometheus.yml"
      - "--storage.tsdb.retention.time=7d"
    volumes:
      - ./prometheus.yaml:/etc/prometheus/prometheus.yml:ro
    ports:
      - "9190:9090"
    extra_hosts:
      - "host.docker.internal:host-gateway"
    depends_on:
      - otel-collector

  grafana:
    image: grafana/grafana:11.1.0
    environment:
      - GF_SECURITY_ADMIN_USER=admin
      - GF_SECURITY_ADMIN_PASSWORD=admin
      - GF_USERS_ALLOW_SIGN_UP=false
    volumes:
      - ./grafana/provisioning:/etc/grafana/provisioning:ro
      - ./grafana/dashboards:/var/lib/grafana/dashboards:ro
    ports:
      - "9000:3000"
    depends_on:
      - prometheus
      - tempo