services:
  zookeeper:
    image: registry.cn-chengdu.aliyuncs.com/reghao/zookeeper:3.8.4 # 生产环境建议锁定具体版本
    restart: always
    container_name: zookeeper
    ports:
      - "2181:2181"
    volumes:
      - /opt/docker/zookeeper/data:/data
      - /opt/docker/zookeeper/datalog:/datalog
      - /opt/docker/zookeeper/logs:/logs
    environment:
      ZOO_MY_ID: 1
      # 1. 自动清理快照和事务日志 (Data & DataLog)
      ZOO_AUTOPURGE_PURGEINTERVAL: 24
      ZOO_AUTOPURGE_SNAPRETAINCOUNT: 5
      # 2. 限制运行日志 (zookeeper.log) 的大小和数量
      # 格式: [日志级别], [Appender]
      # RollingFile: 滚动文件模式
      ZOO_LOG4J_PROP: "INFO, ROLLINGFILE"
      # 每个日志文件最大 100MB
      ZOO_LOG_MAXFILESIZE: "100MB"
      # 最多保留 10 个历史日志文件
      ZOO_LOG_MAXBACKUPINDEX: 10
      # 3. 资源配额与内存
      JVMFLAGS: "-Xms512m -Xmx512m"
      ZOO_MAX_CLIENT_CNXNS: 60
    deploy:
      resources:
        limits:
          cpus: '1.0'
          memory: 1G
        reservations:
          cpus: '0.5'
          memory: 512M
    logging:
      driver: "json-file"
      options:
        max-size: "100m"
        max-file: "3"
    healthcheck:
      # 使用官方提供的 zkServer.sh 状态检查工具
      test: ["CMD", "zkServer.sh", "status"]
      interval: 10s
      timeout: 5s
      retries: 3