How to get two docker-compose services to talk to each other

Imagine you have two services that are started by two different docker-compose files. And you would like these two services to talk to each other. How can we achieve this?

Why would you want to do this in the first place?

I had a use-case for this, that's why! The use case was as follows:

I have a docker-compose file that contains linux-swag and mysql. These are resources that are not updated very often. So I can start them and forget about them.

I have another docker-compose file that contains a Spring Boot application. This application can have different versions (prod, staging, dev). And these version get automatically deployed on each git-push.

Ubuntu Wireless iwlwifi and Windows 10 Dual Boot

If you have Windows 10 and an Ubuntu Dual boot, this may cause your wireless in Ubuntu to stop working. And the culprit seems to the the 'Fast startup' option in Windows. What you need to do is described here. Make sure that 'Fast startup' is turned off! Otherwise it can be that your iwlwifi doesn't get loaded into the Linux Kernel.

Gremlin Console with preloaded Air Routes Graph Data

I am currently learning Apache Tinkerpop. An excellent resource is the free online book PRACTICAL GREMLIN by Kelvin R. Lawrence. And one part of this following this book requires one to setup a Gremlin console. And this was a pain to do each time I would start reading/following the book. So I created a Docker Image which contains the Gremlin Console with the air-routes data preloaded so that you can start working immediately.