Posts in 2023
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 …
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 …
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 …
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 …
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 …
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, …
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 …
Kubernetes 1.27: Single Pod Access Mode for PersistentVolumes Graduates to Beta
By Chris Henzie (Google) | Thursday, April 20, 2023 in Blog
With the release of Kubernetes v1.27 the ReadWriteOncePod feature has graduated to beta. In this blog post, we'll take a closer look at this feature, what it does, and how it has evolved in the beta release. What is ReadWriteOncePod? ReadWriteOncePod …
Kubernetes 1.27: Efficient SELinux volume relabeling (Beta)
By Jan Šafránek (Red Hat) | Tuesday, April 18, 2023 in Blog
The problem On Linux with Security-Enhanced Linux (SELinux) enabled, it's traditionally the container runtime that applies SELinux labels to a Pod and all its volumes. Kubernetes only passes the SELinux label from a Pod's securityContext fields to …
Kubernetes 1.27: More fine-grained pod topology spread policies reached beta
By Alex Wang (Shopee), Kante Yin (DaoCloud), Kensei Nakada (Mercari) | Monday, April 17, 2023 in Blog
In Kubernetes v1.19, Pod topology spread constraints went to general availability (GA). As time passed, we - SIG Scheduling - received feedback from users, and, as a result, we're actively working on improving the Topology Spread feature via three …