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Announcing etcd v3.7.0

This article is a mirror of the original announcement Today, SIG etcd is releasing etcd v3.7.0, the latest minor release of the popular distributed key-value store and core Kubernetes component. v3.7 ships the long-requested RangeStream feature, delivers several other performance improvements, removes the last remnants of the legacy v2store, and completes a major protobuf overhaul. You can download etcd v3.7.0 here: Source code Binaries Official container images This release also includes new versions of the two core etcd dependencies, bbolt v1.5.0 and raft v3.7.0.

9 min readNews
Technology

Operating AI/ML Workloads on Kubernetes: A Headlamp Plugin for Kubeflow

Kubernetes has quietly become the default platform for AI and machine learning. Whether you run notebook servers for data scientists, schedule distributed training jobs, tune hyperparameters, or orchestrate multi-step ML pipelines, those workloads increasingly land on a Kubernetes cluster. Kubeflow is one of the most popular ways to assemble that stack, and it does so the Kubernetes-native way: every capability is exposed as a Custom Resource Definition (CRD). That design is a gift to cluster operators, because it means ML workloads can be observed and managed with the same primitives as everything else in the cluster. But in practice the specialized ML dashboards that ship with these platforms hide the Kubernetes layer underneath. When a notebook is stuck or a training run fails, the operator is often left dropping back to kubectl to find out what actually happened at the Pod level.

4 min readNews
Technology

Building a Custom Metrics Exporter for Kubernetes

Kubernetes ships with built-in awareness of CPU and memory, but most real-world scaling decisions depend on signals that live entirely outside that narrow window: how many messages are waiting in a queue, how long the last batch job took, how many active WebSocket connections a pod is holding. When the built-in metrics are not enough, a metrics exporter bridges that gap. This post walks through writing one from scratch, packaging it as a container, and wiring it into a cluster so that Prometheus — and ultimately the HorizontalPodAutoscaler — can consume it.

7 min readNews
Technology

How the controller-runtime Cache Actually Works, and Why Your Controller Does Not Crash the API Server

This article has been revised since it was first published, to correct several significant technical inaccuracies in the original text. Kubernetes has long been the default platform for distributed workloads, and writing your own controller for it is now a matter of a few hours. The common path — Golang, using kubebuilder on top of controller-runtime — gives you a project scaffold, types, and a reconciler. For typical scenarios that is more than enough. But as soon as load grows or the controller starts behaving in ways you did not expect, a whole class of edge cases shows up. Most of them trace back to the same root cause: a fuzzy mental model of how controller-runtime works inside. If you write Kubernetes controllers in Go, this article should help you build a coherent picture and avoid expensive surprises in production.

32 min readNews
Technology

Kubernetes v1.37 Sneak Peek

As we get closer to the release date for Kubernetes v1.37, the project develops and matures, features may be deprecated, removed, or replaced with better ones for the project's overall health. This blog outlines some of the planned changes for the Kubernetes v1.37 release that the release team feels you should be aware of for the continued maintenance of your Kubernetes environment and keeping up to date with the latest changes. The information below reflects the current status of the v1.37 release and may change before the actual release date.

6 min readNews
Technology

Gateway API v1.6: TCPRoute and UDPRoute Graduate to Standard

The Kubernetes SIG Network community is thrilled to share the release of Gateway API v1.6.0, which was released on June 30th of this year! Gateway API has become the standard for modern, role-oriented, and expressive service networking in Kubernetes. In previous releases, Gateway API established a production-grade foundation for HTTP and TLS layer 7 traffic. With version 1.6.0, Gateway API takes a major step forward by expanding standard layer 4 protocol routing and introducing cleaner API boundaries for experimental innovation.

5 min readNews
Gateway API v1.6: TCPRoute and UDPRoute Graduate to Standard
Technology

Why Is My Kubernetes Job Still Pending? Tracing Kueue Admission with Headlamp

You submit a Kubernetes Job and wait for its Pods to appear. A minute passes. Then another. The Job is still suspended, there are no application logs, and there may not even be a Pod to inspect. In a cluster managed by Kueue, this can be completely normal. Kueue may still be deciding whether the Job can use the requested resources. The useful question is not only “Why is the Pod pending?” It is first “Has Kueue admitted the Workload?”

9 min readNews
Technology

How to Pretty-Print Your Kubernetes YAML as KYAML and Why You'd Want To

YAML has been the standard way to write Kubernetes manifests for years. Every example, tutorial, and configuration file you come across is written in it. The problem isn't that YAML is a bad format. It's that YAML gives you a lot of choices, and not all of them are equally good for writing Kubernetes manifests. Some features make files harder to read, some are easy to misuse and others can lead to surprising behavior.

5 min readNews
Technology

Kubernetes v1.37: Garhwal

Editors: Arsh Sharma, Christopher Tineo, Kirti Goyal, Sophia Ugochukwu, Swathi Rao, Troy Connor Similar to previous releases, the release of Kubernetes v1.37 introduces new Stable, Beta, and Alpha features. The consistent delivery of high-quality releases underscores the strength of our development cycle and the vibrant support from our community. This release consists of 67 enhancements. Of those enhancements, 16 have graduated to Stable, 23 have graduated to Beta, 27 are entering Alpha, and 1 is a deprecation/removal.

38 min readNews
Technology

Kubernetes v1.37: Metrics API graduates to stable

Kubernetes v1.37 promotes the metrics.k8s.io API to stable (v1). This API provides CPU and memory usage for nodes and Pods, and is the API behind commands such as kubectl top and resource-metrics-based autoscaling. For cluster operators and application developers, this graduation means that the API now has the stability guarantees associated with a Kubernetes stable API. The v1 API has the same resource types and fields as v1beta1; this is an API-version graduation, not a change to the metrics that are collected or returned.

2 min readNews