# ========================================
# DOCKER COMPOSE - MONITORING STACK
# Prometheus + Grafana + Exporters
# ========================================

version: '3.9'

services:
  # ========================================
  # Prometheus
  # ========================================
  prometheus:
    image: prom/prometheus:latest
    container_name: math-prometheus
    volumes:
      - ./monitoring/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
      - ./monitoring/prometheus/rules:/etc/prometheus/rules:ro
      - prometheus_data:/prometheus
    command:
      - '--config.file=/etc/prometheus/prometheus.yml'
      - '--storage.tsdb.path=/prometheus'
      - '--storage.tsdb.retention.time=15d'
      - '--web.console.libraries=/usr/share/prometheus/console_libraries'
      - '--web.console.templates=/usr/share/prometheus/consoles'
      - '--web.enable-lifecycle'
    ports:
      - "127.0.0.1:9090:9090"
    networks:
      - monitoring
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "50m"
        max-file: "3"

  # ========================================
  # Grafana
  # ========================================
  grafana:
    image: grafana/grafana:latest
    container_name: math-grafana
    volumes:
      - grafana_data:/var/lib/grafana
      - ./monitoring/grafana/datasources:/etc/grafana/provisioning/datasources:ro
      - ./monitoring/grafana/dashboards:/etc/grafana/provisioning/dashboards:ro
    environment:
      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_PASSWORD:-admin}
      - GF_USERS_ALLOW_SIGN_UP=false
      - GF_SERVER_ROOT_URL=${GRAFANA_URL:-http://localhost:3001}
      - GF_INSTALL_PLUGINS=grafana-clock-panel,grafana-simple-json-datasource
    ports:
      - "127.0.0.1:3001:3000"
    depends_on:
      - prometheus
    networks:
      - monitoring
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "50m"
        max-file: "3"

  # ========================================
  # PostgreSQL Exporter
  # ========================================
  postgres-exporter:
    image: prometheuscommunity/postgres-exporter:latest
    container_name: math-postgres-exporter
    environment:
      DATA_SOURCE_NAME: "postgresql://${DB_USER:-mathuser}:${DB_PASSWORD}@postgres:5432/${DB_NAME:-mathdb}?sslmode=disable"
    ports:
      - "127.0.0.1:9187:9187"
    networks:
      - monitoring
      - backend
    restart: unless-stopped

  # ========================================
  # Redis Exporter
  # ========================================
  redis-exporter:
    image: oliver006/redis_exporter:latest
    container_name: math-redis-exporter
    environment:
      REDIS_ADDR: "redis://redis:6379"
      REDIS_PASSWORD: ${REDIS_PASSWORD}
    ports:
      - "127.0.0.1:9121:9121"
    networks:
      - monitoring
      - backend
    restart: unless-stopped

  # ========================================
  # Node Exporter
  # ========================================
  node-exporter:
    image: prom/node-exporter:latest
    container_name: math-node-exporter
    volumes:
      - /proc:/host/proc:ro
      - /sys:/host/sys:ro
      - /:/rootfs:ro
    command:
      - '--path.procfs=/host/proc'
      - '--path.rootfs=/rootfs'
      - '--path.sysfs=/host/sys'
      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
    ports:
      - "127.0.0.1:9100:9100"
    networks:
      - monitoring
    restart: unless-stopped

  # ========================================
  # Nginx Exporter
  # ========================================
  nginx-exporter:
    image: nginx/nginx-prometheus-exporter:latest
    container_name: math-nginx-exporter
    command:
      - '-nginx.scrape-uri=http://nginx:80/stub_status'
    ports:
      - "127.0.0.1:9113:9113"
    networks:
      - monitoring
      - frontend
    restart: unless-stopped

  # ========================================
  # Alertmanager
  # ========================================
  alertmanager:
    image: prom/alertmanager:latest
    container_name: math-alertmanager
    volumes:
      - ./monitoring/alertmanager/alertmanager.yml:/etc/alertmanager/alertmanager.yml:ro
      - alertmanager_data:/alertmanager
    command:
      - '--config.file=/etc/alertmanager/alertmanager.yml'
      - '--storage.path=/alertmanager'
    ports:
      - "127.0.0.1:9093:9093"
    networks:
      - monitoring
    restart: unless-stopped

  # ========================================
  # cAdvisor (Container Advisor)
  # ========================================
  cadvisor:
    image: gcr.io/cadvisor/cadvisor:latest
    container_name: math-cadvisor
    privileged: true
    devices:
      - /dev/kmsg:/dev/kmsg
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker:/var/lib/docker:ro
      - /cgroup:/cgroup:ro
    ports:
      - "127.0.0.1:8080:8080"
    networks:
      - monitoring
    restart: unless-stopped

volumes:
  prometheus_data:
    driver: local
  grafana_data:
    driver: local
  alertmanager_data:
    driver: local

networks:
  monitoring:
    driver: bridge
  backend:
    external: true
  frontend:
    external: true