Publisher
kubernetes.io
Newest story built on kubernetes.io reporting: Kubernetes v1.35 kubelet refuses to start on cgroup v1 nodes by default (October 10, 2026). kubernetes.io reporting informs the Leadership and Build desks, most often on Kubernetes Releases, AI Agent Sandboxing, and API client backpressure. 8 of our current stories draw on it, the earliest from August 23, 2026.
Kubernetes v1.35 sets failCgroupV1 to true by default, so the kubelet will not start on a node still running cgroup v1. Teams below v1.35 now decide before upgrading between migrating every Linux node and carrying a temporary override the project plans to remove.
Reality
Kubernetes' project blog says NVMe-backed node swap, generally available since v1.34, packed up to 3x more pods onto memory-bound nodes in benchmarks. The gain comes from paging out memory that agent sandboxes hold idle between prompts, so swap-based budgets depend on how much of each pod is truly dormant.
Reality
Kubernetes 1.37 turns on the PVC Unused condition by default and records when each storage claim stopped being referenced by a live pod. Finding idle claims is now built in, so platform teams have to decide who sets the deletion threshold and who answers for a mistake.
Reality
The NativeHistograms gate is on by default in v1.37, and components answer /metrics in both formats. What Prometheus stores depends on two per-job flags, one of which defaults to false and leaves classic dashboards with no data.
Reality
Native histograms are beta and on by default, and Kubernetes keeps emitting classic buckets beside them, so the advertised 90 percent cut in time series depends on a later call about what to stop collecting.
Reality
The v1.37 GA puts X.509 delivery and refresh inside Kubelet, but the authority that actually signs those certificates is still integration work, which is why no adjacent tooling comes out of the plan this quarter.
Reality
The release counts 67 enhancements and 16 graduations to Stable, but the item that changes behaviour on every large cluster is a feature gate now locked on, leaving controller authors to absorb HTTP 429 responses.
Reality
In-place Pod resizing is GA and the kubelet can now issue pod certificates itself, but the fix for feature skew between control plane and nodes is still alpha. Read the removals list first.
Reality