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DevOps & SRE

DevOps & SRE knowledge cards on KnowBite — curated from specialist publications, updated throughout the day.

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

    Kubernetes v1.37 brings important storage security features: emptyDir permission modes and bind mount options. They help application programmers and security professionals implement rigorous security policies, for example, prohibiting deletion of files across containers or execution of arbitrary binaries from writable volumes, directly in Kubernetes without any complicated circumvention. Linux storage and permission…

    Kubernetes Blog · 2026-09-16T18:30:00Z

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

    With the release of Kubernetes v1.37, the Pod-Level Resource Managers feature has graduated to Beta status (disabled by default)! First introduced as an Alpha feature in Kubernetes v1.36 , this enhancement builds on Pod-Level Resources by equipping Kubelet's Topology Manager, CPU Manager, and Memory Manager to use Pod-level resource declarations ( .spec.resources ) directly when making hardware placement decisions…

    Kubernetes Blog · 2026-09-15T18:30:00Z

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

    Memory QoS has graduated to Beta in Kubernetes v1.37 and is now enabled by default. On Linux nodes running cgroup v2, the feature uses the memory controller to give the kernel better guidance on how to treat container memory. It was first introduced as Alpha in v1.22, and expanded in v1.36 with tiered memory reservation. This post covers what changed in v1.37, what the Beta promotion means for cluster operators, and…

    Kubernetes Blog · 2026-09-14T18:30:00Z

  4. Below the Harness: Governing a Multi-Model, Multi-Harness World

    We believe the future is a multi-model, multi-harness world. And we think it needs a new trust model. In 1988, Norm Hardy described a problem that had been quietly breaking systems for years: the confused deputy. A program that takes action using its permissions instead of yours. Today, every AI agent is that deputy. It...

    Docker Blog · 2026-09-02T13:00:00Z

  5. Kubernetes Changed Block Tracking API - Beta Differences

    Changed Block Tracking (CBT) support for CSI drivers shipped as Alpha in September 2025. With the March 2026 v1.0.0 release of the external-snapshot-metadata project, the feature moved to Beta . If you aren't yet familiar with changed block tracking for storage in Kubernetes, the Alpha announcement covers the motivation, the three primary components (the CSI SnapshotMetadata gRPC service, the SnapshotMetadataService…

    Kubernetes Blog · 2026-09-14T18:30:00Z

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

    I'm excited to announce that native histogram support for Kubernetes metrics is graduating to Beta and is enabled by default in Kubernetes v1.37! Native histograms (previously introduced as Alpha in Kubernetes v1.36 under KEP-5808 ) bring high-resolution, low-cardinality observability to Kubernetes metrics. By adopting Prometheus Native Histograms , Kubernetes components now expose latency and duration metrics with…

    Kubernetes Blog · 2026-09-11T18:30:00Z

  7. Secure by default is your only way forward

    The newest worker on your team builds with whatever it finds and never asks what deserves your trust. Our answer is a hardened foundation and a boundary built for agents.

    Docker Blog · 2026-08-31T13:00:00Z

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

    In Kubernetes, resource allocation has historically been a static decision made during a Pod's initial scheduling and placement. With the graduation of the core in-Place Pod resize feature to General Availability in v1.35, application developers and cluster operators gained the powerful ability to dynamically adjust CPU and memory allocations of running containers without incurring disruptive restarts or application…

    Kubernetes Blog · 2026-09-10T18:30:00Z

  9. Kubernetes v1.37: Introducing Node Lifecycle Conditions

    Kubernetes has many ways to describe what is happening on a Node. Readiness, taints, Pod state, labels, annotations, and provider-specific APIs each expose part of the picture. What has been missing is a shared, Kubernetes-owned way to say that a Node is draining , undergoing maintenance, or undergoing Graceful Node Shutdown . Kubernetes v1.37 introduces five well-known Node conditions that provide that description…

    Kubernetes Blog · 2026-09-09T18:30:00Z

  10. MinIO End of Life: How to Stay Patched and Audit-Ready with Docker ELS

    MinIO reached end of life in February 2026. Docker Extended Lifecycle Support (ELS) keeps end-of-life software like it patched, compliant, and audit-ready for up to five years, covering versions upstream no longer supports all the way up to entire projects.

    Docker Blog · 2026-08-24T13:00:00Z

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

    AI/ML and complex batch workloads continue to push the boundaries of Kubernetes scheduling. Following the foundational workload-centric enhancements introduced in previous releases, Kubernetes v1.37 delivers the next major milestone in the Workload-Aware Scheduling (WAS) journey. In this release, the core Workload and PodGroup APIs—enabling gang scheduling—along with Workload-Aware Preemption (WAP) and shared DRA…

    Kubernetes Blog · 2026-09-08T18:30:00Z

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

    Kubernetes v1.37 promotes the KubeletInUserNamespace feature gate to beta. With this feature enabled, all of the node components (kubelet, CRI and OCI runtimes, CNI plugins, and kube-proxy) can run as a non-root user on the host, using a Linux user namespace . This technique is also known as rootless mode . The work started as an experiment in 2018, and was merged into Kubernetes v1.22 (2021) as an alpha feature…

    Kubernetes Blog · 2026-09-04T18:30:00Z