动态传参数

接下来我们在Springboot配置文件把数据库配置用spEL表达式替换 #配置数据库链接

spring.datasource.url = jdbc:mysql://${DB_HOST}:${DB_PORT}/${DB_NAME}?useUnicode=true&characterEncoding=utf8
#配置数据库用户名
spring.datasource.username = ${DB_USER}
#配置数据库密码
spring.datasource.password = ${DB_PASSWORD}

在 docker-compose.yml 配置我们的数据库参数

version: '3'
services:
  web:
    restart: always
    depends_on:
      - db
    image: springboot-app-image
    build: .
    ports:
      - 8080:8080
    environment:
      - DB_HOST=192.168.0.11
      - DB_PORT=3306
      - DB_USER=root
      - DB_PASSWORD=123456
      - DB_NAME=db
    networks:
      - credit-facility-net
    deploy:
      mode: replicated
      replicas: 3
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3
      update_config:
        parallelism: 1
        delay: 10s