myasnikovdaniil
df0da594c0
## What this PR does metrics-server is the third component serving on port 10250 — the kubelet's port — after the webhooks addressed in #3359 and #3360. It ships default-enabled in the platform bundle and is also installed into every tenant Kubernetes cluster with no value overrides, so a package-root override propagates to both. The hard defect here is different from the webhook cases. The chart has first-class `hostNetwork.enabled` support, documented upstream for clusters where the API server cannot reach pod IPs — and on the default port that mode cannot start at all: the kubelet already holds 10250, so the process dies with `bind: address already in use`. Upstream is aware (kubernetes-sigs/metrics-server#1026 carries the exact panic) and declined to change the chart default, advising hostNetwork users to set their own port. This override is that port, set ahead of need. The misleading-certificate angle of the sibling fixes mostly does not apply: the chart defaults `apiService.insecureSkipTLSVerify` to true, so a connection misrouted to a node would fail silently rather than with a wrong-certificate error — and with endpoints resolving to pod IPs such a misroute is not established to occur here at all. The comment states that as a hypothesis, not a fact. What is factual is the consumer set: `kubectl top`, tenant HPAs, and the console's cluster-usage page all read `metrics.k8s.io`; the shipped VPA does not — it is configured with Prometheus storage. The port is 4443 rather than the siblings' 10260, for a reason worth keeping: metrics-server is the one component of the three with supported hostNetwork, and parking it on 10260 would put a live host-network listener on exactly the port the webhook fixes rely on being silent — turning their honest connection refusals back into answered handshakes. 4443 is the value metrics-server's own manifests shipped through v0.6.4, before v0.7.0 moved them to 10250; it sits outside the 10248-10259 node-component block, and nothing in the tree binds it. No chart patch is needed: the Service, both probes and the ServiceMonitor already reference the port by name, so the rollout-gap that required a vendored patch in #3360 does not exist here. The package also gains the standard `test:` target it was missing. Not verified without a cluster: that the aggregated APIService stays Available through an upgrade, and that no supported substrate filters 4443 inbound on nodes — the tree configures no host firewall, but Talos and managed substrates are outside what a render can prove. There is no e2e coverage of `metrics.k8s.io` at all; a wrong guess here would surface as HPAs silently not scaling. ### Release note ```release-note fix(metrics-server): move the listener off port 10250, which the kubelet also holds. The default made hostNetwork mode unable to start at all, and the new port keeps node-port collisions out of the metrics path. ``` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Bug Fixes** * Configured the metrics server to listen on secure port 4443. * Updated service routing and health checks to use the named HTTPS port, improving reliability when port settings change. * Ensured pod networking does not rely on host networking. * **Tests** * Added automated chart tests covering container ports, service routing, and liveness/readiness probes. * Added a test command for running the chart test suite. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
Cozystack
Cozystack is a free 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.
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 as a Kubernetes distribution
You can use Cozystack as a Kubernetes distribution for Bare Metal
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 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 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.