Configuring Intellij memory limits in Quarkus Devcontainer

[milgner]

In order to familiarise myself with the codebase, I'm looking into working on some items from the issue list. After cloning the repository and opening it in IntelliJ IDEA, I was asked whether I wanted to start a devcontainer.
After confirming, a Docker image was built and a container started. But shortly after IntelliJ had installed and started its backend service inside the container, it started to complain about having too little memory available and shortly after stopped working.

This leads me to a couple of questions:

• are devcontainers the recommended approach for working with the codebase? Are they maintained?
• are people using devcontainers with IntelliJ? How do I enable the runtime inside the container to consume more memory?

I already tried changing devcontainer.json and adding --shm-size=32gb to the runArgs - but that didn't change a thing. I assume that I'd also have to change the .vmoptions of IntelliJ that's inside the container but I'm not familiar enough with the architecture of IntelliJ and its setup of devcontainers.

I'm fine with not using the devcontainers but since the configuration is there, I assume that I might not be the only one with issues using them with IntelliJ.

[quarkus-bot[bot]]

/cc @edeandrea (container-image), @geoand (container-image), @radcortez (config)

[geoand]

are devcontainers the recommended approach for working with the codebase? Are they maintained?

I am not aware of any regular maintainers of Quarkus who use them.

are people using devcontainers with IntelliJ? How do I enable the runtime inside the container to consume more memory?

cc @jabrena who added devcontainers support

[jabrena]

Hi @milgner,

I added Devcontainer support in Quarkus mainly to cover the gap when a software engineer wants to review Quarkus but at that moment doesn't have the developer environment ready. In that case, the combination of devcontainer.json + Github Codespaces could help to do the first steps in the Quarkus ecosystem. But if you have IntelliJ or another Java IDE locally, it is better to not use Devcontainer and just clone the repo and interact with the repository with your favorite Java IDE because you are adding an extra layer.

Maybe the folder: https://github.com/quarkusio/quarkus/tree/main/.devcontainer could require a minimum README.md or similar to clarify this kind of doubt. @geoand, do you see value in minimum documentation about when to use Devcontainer in Quarkus?

Note: Personally, I continue learning about it—it is a massive monorepo :)

Juan Antonio

[geoand]

@jabrena sure yeah, that README makes sense to me

[jabrena]

Oki, next week I will submit a PR with it. Happy weekend.

[geoand]

Thanks! You too!