Let’s assume that I have a multi-service application that is supposed to be built using docker-compose.

We have two services A and B. A is an internal service and B is an external one that communicates with the outside world.

HTTP Requests ---> B ---> A

To make A more secure it requires an API key to be used to access it. There is a command line script that can be called to generate a key.

Hence the problem. How to generate the key during the launch of A and passing it to B using docker compose?

Use shared volumes?

Generate secrets on the go? Is that possible?

What?

I tried nothing yet.