services:
  # Parca Server - stores and visualizes profiles
  parca-server:
    image: ghcr.io/parca-dev/parca:v0.22.0
    command:
      - /parca
      - --config-path=/etc/parca/parca.yaml
      - --log-level=info
      - --storage-active-memory=2147483648  # 2GB RAM storage
      - --http-address=:7070
      - --storage-path=/var/lib/parca
    volumes:
      - ./parca-server.yaml:/etc/parca/parca.yaml:ro
      - parca-data:/var/lib/parca
    ports:
      - "7070:7070"  # UI and API
    networks:
      - parca-net
    healthcheck:
      test: ["CMD", "wget", "-q", "--spider", "http://localhost:7070/metrics"]
      interval: 10s
      timeout: 5s
      retries: 5

  # Parca Agent - eBPF profiler (privileged)
  # NOTE: Requires Linux host with eBPF support (privileged mode + host pid)
  parca-agent:
    image: ghcr.io/parca-dev/parca-agent:v0.35.0
    privileged: true  # Required for eBPF
    command:
      - /bin/parca-agent
      - --server-address=parca-server:7070
      - --node=compose-node
      - --log-level=info
      - --metadata-external-labels=environment=demo,service=fastapi
      - --kubernetes=false
      - --collect-agent=false
    volumes:
      - /:/host:ro,rslave
      - /sys/kernel/debug:/sys/kernel/debug
      - /sys/fs/cgroup:/sys/fs/cgroup
      - /sys/fs/bpf:/sys/fs/bpf
      - /run:/run
      - /boot:/boot:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
    pid: host
    networks:
      - parca-net
    depends_on:
      parca-server:
        condition: service_healthy

  # FastAPI Application - target for profiling
  fastapi-app:
    build: .
    command: >
      uvicorn main:app 
      --host 0.0.0.0 
      --port 8000 
      --workers 4 
      --log-level info
    ports:
      - "8000:8000"  # Exposed to host for load generator access
    environment:
      - PYTHONUNBUFFERED=1
      - WORKERS=4
    networks:
      - parca-net
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
      interval: 5s
      timeout: 3s
      retries: 3
    deploy:
      resources:
        limits:
          cpus: '2'
          memory: 1G

networks:
  parca-net:
    driver: bridge

volumes:
  parca-data: