Hello everyone, as you may guess, I'm very new to Kotlin server side. Do you know any article about best practices or helpful libraries for reading external configs (like the config.maps on kubernetes)?

are you using spring boot? or just plain kotlin?

It's just plain Kotlin

system properties would be the first step https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html pass

-DXXX=YYY

on the command line

Great! I'll give it a try, thanks

then inside your app

System.getProperty("XXX")

and it returns

YYY

Luckily, I only need it for a very limited number of configs 🙂

in the case it grows too much the next step is to use this system to point to a file

-Dconfig.file=/etc/myapp/my.properties

👍

better late than never : I like the lightbend config stuff much better than system properties. lightbend/config: configuration library for JVM languages using HOCON files (github.com)