docker-compose java application connection to mongodb

Question

2 Containers, one Java application and the second mongodb.

If I run my java app locally and mongodb in a container, it connects but if both run inside a container, java

Answer 1

You probably cant connect because you set the MONGO_HOST as localhost and mongo is a linked service.

In order to use linked services network, you must specify the MONGO_HOST as the name of the service - mongo, like that:

 MONGO_HOST=mongo