# 数据库服务独立配置文件
# 可用于单独启动和管理数据库服务

version: '3.8'

services:
  # MySQL数据库服务
  anxin-mysql:
    image: mysql:8.0
    container_name: ${COMPOSE_PROJECT_NAME:-anxin}-mysql
    restart: unless-stopped
    
    # 环境变量配置
    environment:
      # 必需的环境变量
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:-root123}
      MYSQL_DATABASE: ${DB_NAME:-anxin}
      MYSQL_USER: ${DB_USER:-anxin}
      MYSQL_PASSWORD: ${DB_PASSWORD:-anxin123}
      
      # 可选的环境变量
      MYSQL_ALLOW_EMPTY_PASSWORD: ${MYSQL_ALLOW_EMPTY_PASSWORD:-no}
      MYSQL_RANDOM_ROOT_PASSWORD: ${MYSQL_RANDOM_ROOT_PASSWORD:-no}
      
      # 系统配置
      TZ: ${TIMEZONE:-Asia/Shanghai}
      
    # 端口映射
    ports:
      - "${DB_PORT:-3306}:3306"
    
    # 卷挂载配置
    volumes:
      # 数据持久化 - 挂载数据目录
      - mysql-data:/var/lib/mysql
      
      # 初始化脚本 - 按字母顺序执行
      - ./init:/docker-entrypoint-initdb.d:ro
      
      # MySQL配置文件
      - ../configs/my.cnf.template:/etc/mysql/conf.d/custom.cnf:ro
      
      # 日志目录
      - mysql-logs:/var/log/mysql
      
      # 临时文件目录
      - mysql-tmp:/tmp
    
    # 网络配置
    networks:
      - anxin-network
    
    # 资源限制
    deploy:
      resources:
        limits:
          memory: ${DATABASE_MEMORY_LIMIT:-512M}
          cpus: '${DATABASE_CPU_LIMIT:-0.5}'
        reservations:
          memory: ${DATABASE_MEMORY_RESERVATION:-256M}
          cpus: '${DATABASE_CPU_RESERVATION:-0.25}'
    
    # 健康检查
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "-p${MYSQL_ROOT_PASSWORD:-root123}"]
      interval: 30s
      timeout: 20s
      retries: 10
      start_period: 60s
    
    # 安全配置
    security_opt:
      - no-new-privileges:true
    
    # 用户配置（可选，用于安全加固）
    # user: "999:999"
    
    # 命令覆盖（可选，用于自定义启动参数）
    command: >
      --character-set-server=utf8mb4
      --collation-server=utf8mb4_unicode_ci
      --default-time-zone='+08:00'
      --max-connections=200
      --innodb-buffer-pool-size=128M
      --innodb-log-file-size=32M
      --innodb-flush-log-at-trx-commit=1
      --slow-query-log=1
      --slow-query-log-file=/var/log/mysql/slow.log
      --long-query-time=3
      --log-error=/var/log/mysql/error.log

# 网络配置
networks:
  anxin-network:
    name: ${NETWORK_NAME:-anxin-network}
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: ${SUBNET:-172.20.0.0/16}
          gateway: ${GATEWAY:-172.20.0.1}

# 卷配置
volumes:
  # 数据库数据卷 - 持久化存储
  mysql-data:
    driver: local
    driver_opts:
      type: none
      o: bind
      device: ${MYSQL_DATA_PATH:-./data/mysql}
  
  # 数据库日志卷
  mysql-logs:
    driver: local
    driver_opts:
      type: none
      o: bind
      device: ${MYSQL_LOGS_PATH:-./data/logs/mysql}
  
  # 临时文件卷
  mysql-tmp:
    driver: local