version: "3.7"
  services:
    db:
      image: mysql:5.6
      ports:
      - 3306:3306
      environment:
      - MYSQL_ROOT_PASSWORD=root
      - TZ=Asia/Shanghai
      volumes:
      - .:/docker-entrypoint-initdb.d
      command: [
        '--character-set-server=utf8',
        '--collation-server=utf8_unicode_ci'
      ]
      healthcheck:
        test: ["CMD", "mysqladmin" ,"ping", "--protocol=tcp"]
        timeout: 20s
        interval: 1s
        retries: 20
  
    redis:
      image: redis
      ports:
        - 6379:6379
      healthcheck:
        test: ["CMD", "redis-cli","ping"]
        interval: 20s
        timeout: 1s
        retries: 20
  
    memcached:
      image: memcached
      ports:
        - 11211:11211 
      healthcheck:
        test: ["CMD", "echo", "stats", "|",  "nc", "127.0.0.1", "11211"]
        interval: 20s
        timeout: 1s
        retries: 20