Posts in 2023

  • Kubernetes 1.27: Avoid Collisions Assigning Ports to NodePort Services

    By Xu Zhenglun (Alibaba) | Thursday, May 11, 2023 in Blog

    In Kubernetes, a Service can be used to provide a unified traffic endpoint for applications running on a set of Pods. Clients can use the virtual IP address (or VIP) provided by the Service for access, and Kubernetes provides load balancing for …

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  • Kubernetes 1.27: Safer, More Performant Pruning in kubectl apply

    By Katrina Verey (independent), Justin Santa Barbara (Google) | Tuesday, May 09, 2023 in Blog

    Declarative configuration management with the kubectl apply command is the gold standard approach to creating or modifying Kubernetes resources. However, one challenge it presents is the deletion of resources that are no longer needed. In Kubernetes …

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  • Kubernetes 1.27: Introducing An API For Volume Group Snapshots

    By Xing Yang (VMware) | Monday, May 08, 2023 in Blog

    Volume group snapshot is introduced as an Alpha feature in Kubernetes v1.27. This feature introduces a Kubernetes API that allows users to take crash consistent snapshots for multiple volumes together. It uses a label selector to group multiple …

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  • Kubernetes 1.27: Quality-of-Service for Memory Resources (alpha)

    By Dixita Narang (Google) | Friday, May 05, 2023 in Blog

    Kubernetes v1.27, released in April 2023, introduced changes to Memory QoS (alpha) to improve memory management capabilites in Linux nodes. Support for Memory QoS was initially added in Kubernetes v1.22, and later some limitations around the formula …

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  • Kubernetes 1.27: StatefulSet PVC Auto-Deletion (beta)

    By Matthew Cary (Google) | Thursday, May 04, 2023 in Blog

    Kubernetes v1.27 graduated to beta a new policy mechanism for StatefulSets that controls the lifetime of their PersistentVolumeClaims (PVCs). The new PVC retention policy lets users specify if the PVCs generated from the StatefulSet spec template …

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  • Kubernetes 1.27: HorizontalPodAutoscaler ContainerResource type metric moves to beta

    By Kensei Nakada (Mercari) | Tuesday, May 02, 2023 in Blog

    Kubernetes 1.20 introduced the ContainerResource type metric in HorizontalPodAutoscaler (HPA). In Kubernetes 1.27, this feature moves to beta and the corresponding feature gate (HPAContainerMetrics) gets enabled by default. What is the …

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  • Kubernetes 1.27: StatefulSet Start Ordinal Simplifies Migration

    By Peter Schuurman (Google) | Friday, April 28, 2023 in Blog

    Kubernetes v1.26 introduced a new, alpha-level feature for StatefulSets that controls the ordinal numbering of Pod replicas. As of Kubernetes v1.27, this feature is now beta. Ordinals can start from arbitrary non-negative numbers. This blog post will …

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  • Updates to the Auto-refreshing Official CVE Feed

    By Cailyn Edwards (Shopify), Mahé Tardy (Isovalent), Pushkar Joglekar | Tuesday, April 25, 2023 in Blog

    Since launching the Auto-refreshing Official CVE feed as an alpha feature in the 1.25 release, we have made significant improvements and updates. We are excited to announce the release of the beta version of the feed. This blog post will outline the …

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  • Kubernetes 1.27: Server Side Field Validation and OpenAPI V3 move to GA

    By Jeffrey Ying (Google), Antoine Pelisse (Google) | Monday, April 24, 2023 in Blog

    Before Kubernetes v1.8 (!), typos, mis-indentations or minor errors in YAMLs could have catastrophic consequences (e.g. a typo like forgetting the trailing s in replica: 1000 could cause an outage, because the value would be ignored and missing, …

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  • Kubernetes 1.27: Query Node Logs Using The Kubelet API

    By Aravindh Puthiyaparambil (Red Hat) | Friday, April 21, 2023 in Blog

    Kubernetes 1.27 introduced a new feature called Node log query that allows viewing logs of services running on the node. What problem does it solve? Cluster administrators face issues when debugging malfunctioning services running on the node. They …

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