Docker将db容器与弹簧引导连接并获取环境变量 [英] Docker linking db container with spring boot and get environment variables

问题描述

  docker run -p 27017：27017 -d  - 我在Docker中有一个springboot应用程序容器和mongodb容器。 name myMongo mongo 
  

所以我先运行mongodb容器，然后再启动springboot容器。

  docker run -p 8080：8080 --name mySpringApp --link myMongo：mongodb mySpringApp 
  pre> 
 
 
之后，我想在我的springboot应用程序中获取环境变量。
  MONGODB_PORT = tcp：//172.17.0.5：27017 
 MONGODB_PORT_5432_TCP = tcp：//172.17.0.5：27017 
 MONGODB_PORT_5432_TCP_PROTO = tcp 
 MONGODB_PORT_5432_TCP_PORT = 27017 
 MONGODB_PORT_5432_TCP_ADDR = 172.17.0.5 
  
在application.properties文件中通常我喜欢ip和port的常量配置，所以它连接mongodb容器没有任何问题。
  spring.data.mongodb.host = 172.17.0.56 
 spring.data .mongodb.port = 27017 
  
但是在该application.properties文件中，我有一种方法来获取环境变量，btw我试过＃{systemEnvironment ['MONGODB_PORT_5432_TCP_ADDR']} 像这样的符号。但我的应用程序无法连接到mongodb容器。有没有一种方法这种情况的任何好的做法，我也试图实现 AbstractMongoConfiguration 获取系统环境变量与 @Value 注释
解决方案
我的建议是丢弃环境变量和属性中的IP。
   - 链接myMongo：mongodb 
  
 
 
 
 
 
将myMongo容器链接到主机'mongodb'。这将管理您的主机配置中的docker。
 
 
现在调整您的属性如下：
  spring.data.mongodb.host = mongodb 
 spring.data.mongodb.port = 27017 
  
 
 
 
 
 
现在不需要管理容器内的IP。
 
 
 
I have an springboot application container and mongodb container in docker.
docker run -p 27017:27017 -d --name myMongo mongo
So I'm running mongodb container first and after springboot container.
docker run -p 8080:8080 --name mySpringApp --link myMongo:mongodb mySpringApp
After that I want to get that environment variables in my springboot app.
MONGODB_PORT=tcp://172.17.0.5:27017
MONGODB_PORT_5432_TCP=tcp://172.17.0.5:27017
MONGODB_PORT_5432_TCP_PROTO=tcp
MONGODB_PORT_5432_TCP_PORT=27017
MONGODB_PORT_5432_TCP_ADDR=172.17.0.5
In application.properties file normally I have like that constant configuration for ip and port, so it connect mongodb container without any problem.
spring.data.mongodb.host=172.17.0.56
spring.data.mongodb.port=27017
But in that application.properties file i there a way to get that environment variables , btw i tried  #{systemEnvironment['MONGODB_PORT_5432_TCP_ADDR']} like this notation. But my app couldn't connect to mongodb container. Is there a way any good practise for this situation , also i tried to implement AbstractMongoConfiguration get systemEnvironment variables with @Value annotation.
解决方案
My advise is to discard the IP inside the environment variables and properties at all.
--link myMongo:mongodb



  
Links myMongo container to host 'mongodb'. This manages docker inside your host config.
Now adjust your properties as follows:
spring.data.mongodb.host=mongodb
spring.data.mongodb.port=27017



  
Now there is no need to manage IPs inside the container.


                        
这篇关于Docker将db容器与弹簧引导连接并获取环境变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！