# TicketLab lab observability — Grafana + Tempo + Loki + OTEL Collector (+ Prometheus)
# Start: docker compose up -d
# UI:    http://localhost:3001  (admin / admin)
# OTLP:  http://localhost:4318 (HTTP) | localhost:4317 (gRPC)

services:
  otel-collector:
    image: otel/opentelemetry-collector-contrib:0.120.0
    command: ["--config=/etc/otelcol/config.yaml"]
    volumes:
      - ./observability/otel-collector-config.yaml:/etc/otelcol/config.yaml:ro
    ports:
      - "4317:4317" # OTLP gRPC
      - "4318:4318" # OTLP HTTP
      - "8889:8889" # collector Prometheus metrics (optional)
    depends_on:
      - tempo
      - loki
      - prometheus

  tempo:
    image: grafana/tempo:2.7.1
    command: ["-config.file=/etc/tempo/tempo.yaml"]
    volumes:
      - ./observability/tempo.yaml:/etc/tempo/tempo.yaml:ro
      - tempo-data:/var/tempo
    ports:
      - "3200:3200" # Tempo HTTP / API

  loki:
    image: grafana/loki:3.4.2
    command: ["-config.file=/etc/loki/loki.yaml"]
    volumes:
      - ./observability/loki.yaml:/etc/loki/loki.yaml:ro
      - loki-data:/loki
    ports:
      - "3100:3100"

  prometheus:
    image: prom/prometheus:v3.2.1
    volumes:
      - ./observability/prometheus.yml:/etc/prometheus/prometheus.yml:ro
      - prometheus-data:/prometheus
    ports:
      - "9090:9090"
    # Host scrape: app on the host publishing GET /metrics
    extra_hosts:
      - "host.docker.internal:host-gateway"

  grafana:
    image: grafana/grafana:11.5.2
    environment:
      GF_SECURITY_ADMIN_USER: admin
      GF_SECURITY_ADMIN_PASSWORD: admin
      GF_AUTH_ANONYMOUS_ENABLED: "true"
      GF_AUTH_ANONYMOUS_ORG_ROLE: Viewer
      GF_USERS_DEFAULT_THEME: dark
    volumes:
      - ./observability/grafana/provisioning:/etc/grafana/provisioning:ro
      - grafana-data:/var/lib/grafana
    ports:
      - "3001:3000"
    depends_on:
      - tempo
      - loki
      - prometheus

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