spring.datasource.url = jdbc:mysql://192.168.0.11:3306/db"color: #ff0000">解决方案

利用SpEL表达式，动态从环境变量获取数据库配置



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}"htmlcode">

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


这样我们的Springboot应用就可以在启动容器服务的时候动态获取数据库配置了