Kubernetes Blog

• Kubernetes 1.32: Moving Volume Group Snapshots to Beta 2024-12-18
  Volume group snapshots were introduced as an Alpha feature with the Kubernetes 1.27 release. The recent release of Kubernetes v1.32 moved that support to beta. The support for volume group snapshots relies on a set of extension APIs for group snapshots. These APIs allow users to take crash consistent snapshots for a set of volumes. […]
• Enhancing Kubernetes API Server Efficiency with API Streaming 2024-12-17
  Managing Kubernetes clusters efficiently is critical, especially as their size is growing. A significant challenge with large clusters is the memory overhead caused by list requests. In the existing implementation, the kube-apiserver processes list requests by assembling the entire response in-memory before transmitting any data to the client. But what if the response body is […]
• Kubernetes v1.32 Adds A New CPU Manager Static Policy Option For Strict CPU Reservation 2024-12-16
  In Kubernetes v1.32, after years of community discussion, we are excited to introduce a strict-cpu-reservation option for the CPU Manager static policy. This feature is currently in alpha, with the associated policy hidden by default. You can only use the policy if you explicitly enable the alpha behavior in your cluster. Understanding the feature The […]
• Kubernetes v1.32: Memory Manager Goes GA 2024-12-13
  With Kubernetes 1.32, the memory manager has officially graduated to General Availability (GA), marking a significant milestone in the journey toward efficient and predictable memory allocation for containerized applications. Since Kubernetes v1.22, where it graduated to beta, the memory manager has proved itself reliable, stable and a good complementary feature for the CPU Manager. As […]
• Kubernetes v1.32: QueueingHint Brings a New Possibility to Optimize Pod Scheduling 2024-12-12
  The Kubernetes scheduler is the core component that selects the nodes on which new Pods run. The scheduler processes these new Pods one by one. Therefore, the larger your clusters, the more important the throughput of the scheduler becomes. Over the years, Kubernetes SIG Scheduling has improved the throughput of the scheduler in multiple enhancements. […]
• Kubernetes v1.32: Penelope 2024-12-11
  Editors: Matteo Bianchi, Edith Puclla, William Rizzo, Ryota Sawada, Rashan Smith Announcing the release of Kubernetes v1.32: Penelope! In line with previous releases, the release of Kubernetes v1.32 introduces new stable, beta, and alpha features. The consistent delivery of high-quality releases underscores the strength of our development cycle and the vibrant support from our community. […]
• Gateway API v1.2: WebSockets, Timeouts, Retries, and More 2024-11-21
  Kubernetes SIG Network is delighted to announce the general availability of Gateway API v1.2! This version of the API was released on October 3, and we're delighted to report that we now have a number of conformant implementations of it for you to try out. Gateway API v1.2 brings a number of new features to […]
• How we built a dynamic Kubernetes API Server for the API Aggregation Layer in Cozystack 2024-11-21
  Hi there! I'm Andrei Kvapil, but you might know me as @kvaps in communities dedicated to Kubernetes and cloud-native tools. In this article, I want to share how we implemented our own extension api-server in the open-source PaaS platform, Cozystack. Kubernetes truly amazes me with its powerful extensibility features. You're probably already familiar with the […]
• Kubernetes v1.32 sneak peek 2024-11-08
  As we get closer to the release date for Kubernetes v1.32, the project develops and matures. Features may be deprecated, removed, or replaced with better ones for the project's overall health. This blog outlines some of the planned changes for the Kubernetes v1.32 release, that the release team feels you should be aware of, for […]
• Spotlight on Kubernetes Upstream Training in Japan 2024-10-28
  We are organizers of Kubernetes Upstream Training in Japan. Our team is composed of members who actively contribute to Kubernetes, including individuals who hold roles such as member, reviewer, approver, and chair. Our goal is to increase the number of Kubernetes contributors and foster the growth of the community. While Kubernetes community is friendly and […]
• Announcing the 2024 Steering Committee Election Results 2024-10-02
  The 2024 Steering Committee Election is now complete. The Kubernetes Steering Committee consists of 7 seats, 3 of which were up for election in 2024. Incoming committee members serve a term of 2 years, and all members are elected by the Kubernetes Community. This community body is significant since it oversees the governance of the […]
• Spotlight on CNCF Deaf and Hard-of-hearing Working Group (DHHWG) 2024-09-30
  In recognition of Deaf Awareness Month and the importance of inclusivity in the tech community, we are spotlighting Catherine Paganini, facilitator and one of the founding members of CNCF Deaf and Hard-of-Hearing Working Group (DHHWG). In this interview, Sandeep Kanabar, a deaf member of the DHHWG and part of the Kubernetes SIG ContribEx Communications team, […]
• Spotlight on SIG Scheduling 2024-09-24
  In this SIG Scheduling spotlight we talked with Kensei Nakada, an approver in SIG Scheduling. Introductions Arvind: Hello, thank you for the opportunity to learn more about SIG Scheduling! Would you like to introduce yourself and tell us a bit about your role, and how you got involved with Kubernetes? Kensei: Hi, thanks for the […]
• Kubernetes v1.31: kubeadm v1beta4 2024-08-23
  As part of the Kubernetes v1.31 release, kubeadm is adopting a new (v1beta4) version of its configuration file format. Configuration in the previous v1beta3 format is now formally deprecated, which means it's supported but you should migrate to v1beta4 and stop using the deprecated format. Support for v1beta3 configuration will be removed after a minimum […]
• Kubernetes 1.31: Custom Profiling in Kubectl Debug Graduates to Beta 2024-08-22
  There are many ways of troubleshooting the pods and nodes in the cluster. However, kubectl debug is one of the easiest, highly used and most prominent ones. It provides a set of static profiles and each profile serves for a different kind of role. For instance, from the network administrator's point of view, debugging the […]
• Kubernetes v1.31: New Kubernetes CPUManager Static Policy: Distribute CPUs Across Cores 2024-08-22
  In Kubernetes v1.31, we are excited to introduce a significant enhancement to CPU management capabilities: the distribute-cpus-across-cores option for the CPUManager static policy. This feature is currently in alpha and hidden by default, marking a strategic shift aimed at optimizing CPU utilization and improving system performance across multi-core processors. Understanding the feature Traditionally, Kubernetes' CPUManager […]
• Kubernetes 1.31: Fine-grained SupplementalGroups control 2024-08-22
  This blog discusses a new feature in Kubernetes 1.31 to improve the handling of supplementary groups in containers within Pods. Motivation: Implicit group memberships defined in /etc/group in the container image Although this behavior may not be popular with many Kubernetes cluster users/admins, kubernetes, by default, merges group information from the Pod with information defined […]
• Kubernetes 1.31: Autoconfiguration For Node Cgroup Driver (beta) 2024-08-21
  Historically, configuring the correct cgroup driver has been a pain point for users running new Kubernetes clusters. On Linux systems, there are two different cgroup drivers: cgroupfs and systemd. In the past, both the kubelet and CRI implementation (like CRI-O or containerd) needed to be configured to use the same cgroup driver, or else the […]
• Kubernetes 1.31: Streaming Transitions from SPDY to WebSockets 2024-08-20
  In Kubernetes 1.31, by default kubectl now uses the WebSocket protocol instead of SPDY for streaming. This post describes what these changes mean for you and why these streaming APIs matter. Streaming APIs in Kubernetes In Kubernetes, specific endpoints that are exposed as an HTTP or RESTful interface are upgraded to streaming connections, which require […]
• Kubernetes 1.31: Pod Failure Policy for Jobs Goes GA 2024-08-19
  This post describes Pod failure policy, which graduates to stable in Kubernetes 1.31, and how to use it in your Jobs. About Pod failure policy When you run workloads on Kubernetes, Pods might fail for a variety of reasons. Ideally, workloads like Jobs should be able to ignore transient, retriable failures and continue running to […]