Docker撰写从链接迁移到网络MongoDB数据库问题

我正在尝试通过Dockerfile从使用链接迁移到网络,但遇到了一些问题。我将首先绘制我的原始设置:

原始-链接

Dockerfile文件:

FROM java:8
VOLUME /tmp
ADD docker_micro_maven-0.0.1-SNAPSHOT.jar app.jar
RUN bash -c 'touch /app.jar'
EXPOSE 8080
ENTRYPOINT ["java","-Dspring.data.mongodb.uri=mongodb://mongodb/micros", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

docker-compose.yml:

mongodb:
 image: mongo
employee:
 image: jdruwe/docker_micro_maven
 links:
  - mongodb
 ports:
  - "8080"

新建-网络

Dockerfile文件:

FROM java:8
VOLUME /tmp
ADD docker_micro_maven-0.0.1-SNAPSHOT.jar app.jar
RUN bash -c 'touch /app.jar'
EXPOSE 8080
ENTRYPOINT ["java","-Dspring.data.mongodb.uri=mongodb://${MONGO_URI_DOCKER}/micros", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

docker-compose.yml:

mongodb:
 container_name: "db"
 image: mongo
employee:
 image: jdruwe/docker_micro_maven
 environment:
  - MONGO_URI_DOCKER=db:27017
 ports:
  - "8080"

当我在springboot应用程序中调用rest端点时(原始情况),我总是得到一个响应(一些json数据)。当我现在调用它时,我得到以下错误响应:

{
  "timestamp": 1453405937191,
  "status": 500,
  "error": "Internal Server Error",
  "exception": "org.springframework.dao.DataAccessResourceFailureException",
  "message": "Timed out after 10000 ms while waiting to connect. Client view of cluster state is {type=Unknown, servers=[{address=db:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.UnknownHostException: db: unknown error}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 10000 ms while waiting to connect. Client view of cluster state is {type=Unknown, servers=[{address=db:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.UnknownHostException: db: unknown error}}]",
  "path": "/employee"
}

我用Devox的视频作为参考: https://youtu.be/aSATsLG59Zs?t=53m33s

我似乎一直在做错事,但我不确定是什么,欢迎任何帮助。提前谢谢!