K8s - 1

2025 (7)

September (7)

k8s: Announcing Changed Block Tracking API support (alpha)

Kubernetes Official Blog

2025-09-25

Kubernetes announces alpha support for a Changed Block Tracking API that lets CSI drivers report allocated and changed blocks between snapshots to enable faster, incremental backups for block volumes. The feature requires a SnapshotMetadataService CRD, an external-snapshot-metadata sidecar, and CSI SnapshotMetadata gRPC RPCs (GetMetadataAllocated and GetMetadataDelta) with streaming responses.

k8s: Kubernetes v1.34: Pod Level Resources Graduated to Beta

Kubernetes Official Blog

2025-09-22

Kubernetes v1.34 graduates Pod Level Resources to Beta and enables it by default. The feature lets you declare CPU, memory and hugepages for an entire Pod (in addition to per-container settings), with pod-level requests used for scheduling and pod-level limits acting as an absolute runtime cap; it improves intra-pod sharing and QoS handling but has several platform and feature limitations.

k8s: Kubernetes v1.34: Recovery From Volume Expansion Failure (GA)

Kubernetes Official Blog

2025-09-19

Kubernetes v1.34 graduates automated recovery from failed persistent volume expansions to GA. Users can correct an over-sized PersistentVolumeClaim (PVC) by reducing the requested size (as long as the new request is still larger than the PV's original capacity) without cluster-admin intervention; consumed quota from a failed expansion is returned automatically. The release also introduces improved observability and error reporting for expansion operations, retries with reduced request rates, and several resizing workflow bug fixes.

k8s: Kubernetes v1.34: DRA Consumable Capacity

Kubernetes Official Blog

2025-09-18

Kubernetes v1.34 introduces the alpha feature DRAConsumableCapacity for Dynamic Resource Allocation (DRA). It enables finer-grained, consumable device capacity so multiple ResourceClaims or DeviceRequests (even across namespaces) can share portions of a device. The scheduler enforces total consumable capacity, drivers can opt into multiple allocations and define request policies, and a ShareID in allocation status distinguishes individual shared slices. The feature requires enabling a feature gate on control plane and kubelet components and complements other DRA improvements like partitionable devices and device status.

k8s: Kubernetes v1.34: Pods Report DRA Resource Health

Kubernetes Official Blog

2025-09-17

Kubernetes v1.34 introduces an alpha feature (ResourceHealthStatus) that lets Dynamic Resource Allocation (DRA) drivers report device health into a Pod's status via a new dra-health/v1alpha1 gRPC service, enabling the Kubelet to surface per-device health in v1.ContainerStatus. This improves debuggability for hardware-backed workloads by showing device health (Healthy/Unhealthy/Unknown) in allocatedResourcesStatus and requires enabling the feature gate and compatible DRA drivers.

k8s: Kubernetes v1.34: Moving Volume Group Snapshots to v1beta2

Kubernetes Official Blog

2025-09-16

Kubernetes v1.34 advances Volume Group Snapshots to v1beta2. The update adds a VolumeSnapshotInfo type and replaces VolumeSnapshotHandlePairList with VolumeSnapshotInfoList to fix restoreSize handling when CSI drivers do not implement ListSnapshots; objects are migrated from v1beta1 via a conversion webhook and the feature remains CSI-only with GA planned later.

k8s: Kubernetes v1.34: Decoupled Taint Manager Is Now Stable

Kubernetes Official Blog

2025-09-15

Kubernetes v1.34 promotes the SeparateTaintEvictionController feature to GA, splitting responsibilities so the node lifecycle controller only applies NoExecute taints while a dedicated taint eviction controller handles pod eviction. This improves code separation, enables easier improvements or custom eviction implementations, and can be disabled via a kube-controller-manager flag. Documentation and a KEP/beta announcement provide more details.