Andrei Kvapil f1d86e5045 [keycloak, cozy-lib] Calculate Java heap params (#1157)
## What this PR does

This patch passes Java heap parameters to Keycloak to prevent OOM errors
when the JVM lacks compatibility with cgroups v2 and fails to recognize
container memory requests and limits. A new function is introduced in
cozy-lib to calculate the heap parameters from requests and limits,
setting Xmx to 75% of the memory limit and Xms to the lesser of the
memory request or 25% of the memory limits.

## Release note

```release-note
[keycloak] Calculate and pass Java heap parameters explicitly to prevent OOM errors.
[cozy-lib] Introduce helper function to calculate Java heap params based on memory requests and limits.
```

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added automatic calculation and injection of Java heap size settings
for the Keycloak container, based on resource requests and limits.
* **Improvements**
* Enhanced resource handling to ensure all resource values are
consistently formatted and sanitized.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Cozystack Cozystack

Open Source Apache-2.0 License Support Active GitHub Release GitHub Commit

Cozystack

Cozystack is a free PaaS platform and framework for building clouds.

Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.

With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.

Use Cozystack to build your own cloud or provide a cost-effective development environment.

Cozystack user interface

Use-Cases

Documentation

The documentation is located on the cozystack.io website.

Read the Getting Started section for a quick start.

If you encounter any difficulties, start with the troubleshooting guide and work your way through the process that we've outlined.

Versioning

Versioning adheres to the Semantic Versioning principles.
A full list of the available releases is available in the GitHub repository's Release section.

Contributions

Contributions are highly appreciated and very welcomed!

In case of bugs, please check if the issue has already been opened by checking the GitHub Issues section. If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.

You can express your intention to on the fix on your own. Commits are used to generate the changelog, and their author will be referenced in it.

If you have Feature Requests please use the Discussion's Feature Request section.

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You are welcome to join our Telegram group and come to our weekly community meetings. Add them to your Google Calendar or iCal for convenience.

License

Cozystack is licensed under Apache 2.0.
The code is provided as-is with no warranties.

Commercial Support

A list of companies providing commercial support for this project can be found on official site.

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