K8s - 1

2026 (12)

September (12)

k8s: Spotlight on SIG Apps

Kubernetes Official Blog

2026-09-22

SIG Apps is working on workload controller reliability, node lifecycle handling, and new patterns for AI and distributed workloads while preserving backward compatibility. The article highlights current focus areas, the trade-offs in changing core APIs, and a proposed Job API update for Kubernetes 1.38.

k8s: Kubernetes v1.37: Tracking When a PersistentVolumeClaim Was Last Used (Beta)

Kubernetes Official Blog

2026-09-21

Kubernetes v1.37 promotes PersistentVolumeClaimUnusedSinceTime to Beta and enables it by default. PVCs now get an Unused condition in status so you can tell whether any running or pending pod references the claim, and use lastTransitionTime to see when it last became idle.

k8s: Kubernetes v1.37: Hardening Container Storage with Bind Mount Options and EmptyDir Permissions

Kubernetes Official Blog

2026-09-16

Kubernetes v1.37 adds alpha support for bind mount options on volume mounts and configurable permission modes for emptyDir volumes. These features let users apply Linux mount flags like noexec, nosuid, and nodev, and set emptyDir modes such as 01777 or 0750 without init-container workarounds.

k8s: Kubernetes v1.37: Pod-Level Resource Managers graduated to Beta

Kubernetes Official Blog

2026-09-15

Kubernetes v1.37 graduates Pod-Level Resource Managers to Beta, disabled by default behind the PodLevelResourceManagers feature gate. Kubelet’s Topology Manager, CPU Manager, and Memory Manager can now use pod-level resource declarations for NUMA-aware placement, and the PodResources API reports top-level CPU and memory assignments.

k8s: Kubernetes v1.37: Memory QoS Graduates to Beta

Kubernetes Official Blog

2026-09-14

Kubernetes v1.37 makes Memory QoS Beta and turns it on by default, but it does not change runtime behavior unless you explicitly set throttling or reservation fields. The main config change is that `memoryThrottlingFactor` now defaults to `null`, so existing clusters will not start writing `memory.high` unless they already set it.

k8s: Kubernetes Changed Block Tracking API - Beta Differences

Kubernetes Official Blog

2026-09-14

Kubernetes changed block tracking for CSI drivers is now Beta with external-snapshot-metadata v1.0.0. The main Beta change is promotion of SnapshotMetadataService from cbt.storage.k8s.io/v1alpha1 to v1beta1, with no schema change but no served v1alpha1 version.

k8s: Kubernetes v1.37: Native Histograms Graduates to Beta

Kubernetes Official Blog

2026-09-11

Kubernetes v1.37 enables native histogram support for metrics by default and moves the feature to Beta. Components now dual-expose classic buckets and native spans, and users must adjust Prometheus scraping and queries depending on Prometheus version.

k8s: Kubernetes v1.37: Scheduler Preemption for In-Place Pod Resize (Alpha)

Kubernetes Official Blog

2026-09-10

Kubernetes v1.37 adds alpha support for scheduler preemption during in-place Pod resize, gated by InPlacePodVerticalScalingSchedulerPreemption. If a running Pod’s resize is Deferred due to lack of node capacity, the scheduler can now preempt lower-priority Pods on the same node so the resize can complete without restarting the Pod.

k8s: Kubernetes v1.37: Introducing Node Lifecycle Conditions

Kubernetes Official Blog

2026-09-09

Kubernetes v1.37 reserves five well-known Node lifecycle condition types and adds an alpha feature gate for future built-in behavior, but the gate is disabled by default and no core components act on the conditions yet. The release is meant to provide a shared, Kubernetes-owned signal for drains, maintenance, and graceful shutdown so operators and external controllers can report Node lifecycle state consistently.

k8s: Kubernetes v1.37: Advancing Workload-Aware Scheduling

Kubernetes Official Blog

2026-09-08

Kubernetes v1.37 advances Workload-Aware Scheduling: Workload and PodGroup APIs, gang scheduling, workload-aware preemption, and shared DRA ResourceClaims graduate to Beta. It also introduces Alpha support for CompositePodGroup and multi-level topology-aware scheduling, plus new controller integration APIs and Job controller integration for explicit WAS configuration.

k8s: Kubernetes v1.37: KubeletInUserNamespace (aka Rootless mode) Graduates to Beta

Kubernetes Official Blog

2026-09-04

Kubernetes v1.37 moves KubeletInUserNamespace to beta and enables the feature gate by default. It allows node components to run as a non-root user in a Linux user namespace, reducing host impact from node-component exploits, while leaving existing rootful clusters unchanged unless explicitly configured.

k8s: Kubernetes v1.37: DRA Updates

Kubernetes Official Blog

2026-09-03

Kubernetes 1.37 adds several DRA updates, including GA support for extended resources, stable device taints/tolerations, and stable standardized NUMA node attributes. It also promotes multiple DRA features to Beta or Alpha, with focus areas including workload-level ResourceClaims, device metadata/status, scheduling performance, and fractional consumable capacity.