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Kubernetes - 3

2026 (9)

July (9)

k8s: How the controller-runtime Cache Actually Works, and Why Your Controller Does Not Crash the API Server

Kubernetes Official Blog

2026-07-29

The article explains that controller-runtime controllers read from a local informer cache, not directly from the API server, and that writes go to the API server while the cache catches up asynchronously via watch events. It also details how shared informers, DeltaFIFO, indexing, cache scoping, APIReader, and cache disabling affect consistency, memory use, and query behavior.

azure: [Launched] Generally Available: Application Routing with Gateway API

Azure Updates

2026-07-28

Application Routing with Gateway API is now generally available on Azure Kubernetes Service (AKS). It lets teams use the Kubernetes Gateway API for ingress routing while supporting existing deployments.

azure: [Launched] Generally Available: Resource placement in Azure Kubernetes Fleet Manager

Azure Updates

2026-07-28

Resource placement in Azure Kubernetes Fleet Manager is now generally available. It lets users define where Kubernetes resources should be scheduled across multiple clusters to reduce manual work and improve consistency.

azure: [In preview] Public Preview: Maximum allowed failures for update runs in Azure Kubernetes Fleet Manager

Azure Updates

2026-07-28

Azure Kubernetes Fleet Manager now has a preview option to set a maximum number of allowed failures for update runs. In fail-fast rollouts, this lets some member cluster update failures occur without stopping the broader deployment immediately.

aks: Release 2026-07-17

Release notes from AKS

2026-07-24

AKS v20260717 adds Artifact Streaming GA, new preview networking and scheduling features, and multiple behavior changes and bug fixes. It also updates Kubernetes patch versions, core add-ons, node images, and includes several retirement notices and upcoming defaults.

k8s: Building a Custom Metrics Exporter for Kubernetes

Kubernetes Official Blog

2026-07-14

The post explains how to build a custom Prometheus metrics exporter for Kubernetes in Go, package it as a minimal container image, and expose it for scraping by Prometheus. It also shows how to verify the target in Prometheus and notes that a metrics adapter such as Prometheus Adapter is needed if you want to use the exported metrics for HorizontalPodAutoscaler scaling.

k8s: Operating AI/ML Workloads on Kubernetes: A Headlamp Plugin for Kubeflow

Kubernetes Official Blog

2026-07-13

Kubernetes announced a Headlamp plugin for Kubeflow that surfaces Kubeflow CRDs and related Pod-level state directly in the Headlamp Kubernetes UI. The plugin is aimed at operators and SREs troubleshooting ML workloads and works with modular Kubeflow installs by discovering available API groups at runtime.

k8s: Kubernetes Dashboard to Headlamp: A Step-by-Step Guide

Kubernetes Official Blog

2026-07-13

Kubernetes Dashboard users can migrate to Headlamp by choosing either a desktop or in-cluster deployment. The guide covers kubeconfig-based auth, OIDC for shared installs, multi-cluster support, YAML-based resource creation, debugging features, and cleanup of Dashboard-specific access and RBAC.

k8s: Announcing etcd v3.7.0

Kubernetes Official Blog

2026-07-08

etcd v3.7.0 adds RangeStream for chunked range results, improves range/lease/watch performance, and completes the move off legacy v2store dependencies. It also includes protobuf dependency cleanup, Unix socket support, new metrics, and several upgrade-breaking removals.