Aleksei Sviridkin
f6f5c7ab75
Strimzi sizes a broker heap by asking the image's JDK 17 what heap it
would pick at MaxRAMPercentage=50, capped at 5 GiB.
On kernels built without CONFIG_MEMCG_V1 that JDK cannot see the limit
and reports host RAM, so every broker and controller starts with up to
a 5 GiB heap inside a 1Gi limit and is OOM-killed. The topic and user
operators run the same JDK with percentage-based defaults, and the
drain-time Cruise Control takes 75% of host RAM for its heap.
Each of these containers now gets JAVA_TOOL_OPTIONS with -XX:MaxRAM set
to its memory limit, plus -XX:ActiveProcessorCount where the chart sets
a CPU limit. The entity operators and Cruise Control have none in the
chart, so a LimitRange default still leaves them counting host CPUs:
Strimzi template env takes no resourceFieldRef. Every java in the
container reads JAVA_TOOL_OPTIONS, Strimzi's heap probe included, so
Strimzi's own heap rules and Kafka's G1 defaults apply to the real
memory limit. jvmOptions would not do: Strimzi turns -XX options into
KAFKA_JVM_PERFORMANCE_OPTS, and kafka-run-class.sh skips its G1 settings
when that is set. Each JVM prints a "Picked up JAVA_TOOL_OPTIONS" line
on start. Existing clusters roll once on upgrade, because the pod
environment changes.
Assisted-by: LLM
Signed-off-by: Aleksei Sviridkin <f@lex.la>
(cherry picked from commit 479d17abc8)
Cozystack
Cozystack is a free and open-source platform and framework for building clouds.
Cozystack is a CNCF Sandbox 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.
Use-Cases
-
Using Cozystack to build a public cloud
You can use Cozystack as a backend for a public cloud -
Using Cozystack to build a private cloud
You can use Cozystack as a platform to build a private cloud powered by Infrastructure-as-Code approach -
Using Cozystack to build your own platform
You can install only the Cozystack components you need on an existing Kubernetes cluster
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 are welcome to take on the fix yourself. Commits are used to generate the changelog, and their author will be referenced in it.
If you have a concrete feature request, open an issue. For a cross-cutting or architectural change, open a design proposal in the community repo. For questions or early ideas, use GitHub Discussions. See CONTRIBUTING.md for the full routing.
Community
You are welcome to join us in #cozystack, on either CNCF Slack (get an invite) or Kubernetes Slack (get an invite), in our Telegram group, and at our community meetings. Add them to your Google Calendar or iCal for convenience.
Project documents
| Document | What it covers |
|---|---|
| Governance | How decisions are made and who makes them |
| Contributor Ladder | How to grow from contributor to maintainer |
| Maintainers | Who maintains the project |
| Code of Conduct | What we expect of each other |
| Security Policy | Reporting a vulnerability, and which releases get fixes |
| Adopters | Who runs Cozystack in production |
| Roadmap | Where the project is going |
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.