{"id":40179,"date":"2026-05-08T02:16:27","date_gmt":"2026-05-08T00:16:27","guid":{"rendered":"https:\/\/www.cloudmagazin.com\/2026\/05\/08\/kubernetes-1-36-haru-ist-ga-was-die-cgroup-v1-abschaltung\/"},"modified":"2026-05-08T02:16:27","modified_gmt":"2026-05-08T00:16:27","slug":"kubernetes-1-36-haru-ist-ga-was-die-cgroup-v1-abschaltung","status":"publish","type":"post","link":"https:\/\/www.cloudmagazin.com\/en\/2026\/05\/08\/kubernetes-1-36-haru-ist-ga-was-die-cgroup-v1-abschaltung\/","title":{"rendered":"DRA Stability Forces GPU Workloads to Reimagine Themselves"},"content":{"rendered":"<p style=\"color:#0bb7fd;font-size:0.9em;margin:0 0 16px;\">6 Min. Reading Time<\/p>\n<p><strong>Kubernetes 1.36 \u201cHaru\u201d has been generally available since April 22, 2026, and brings two changes that require immediate action for DACH enterprise clusters: cgroup v1 is not deprecated but completely removed \u2013 Dynamic Resource Allocation for GPU workloads is now stable. Anyone still running on cgroup v1 can no longer perform an upgrade without migrating first.<\/strong><\/p>\n<h2>Key Takeaways<\/h2>\n<ul>\n<li>Kubernetes 1.36 \u201cHaru\u201d GA since April 22, 2026: cgroup v1 completely removed, no path back after upgrade<\/li>\n<li>cgroup v2 mandatory: all nodes must be migrated to cgroup v2 before upgrading \u2013 RHEL 9+, Ubuntu 22.04+, and SLES 15 SP5+ have it enabled by default<\/li>\n<li>Dynamic Resource Allocation (DRA) stable: structured GPU\/FPGA scheduling without device plugin workarounds is now production-ready<\/li>\n<li>Job API: successive parallelism control stable \u2013 max-in-flight management for batch workloads significantly improved<\/li>\n<li>Recommendation: lift upgrade freeze only after validating cgroup v2 on all worker nodes across all clusters<\/li>\n<\/ul>\n<p style=\"font-size:0.88em;color:#666;margin:20px 0 32px 0;border-top:1px solid #e5e5e5;border-bottom:1px solid #e5e5e5;padding:10px 0;\">Related: <a href=\"https:\/\/www.cloudmagazin.com\/en\/2026\/05\/03\/s3-vs-efs-vs-fsx-which-aws-file-service-fits-your-2026-cloud-workload\/\">S3 Files vs. EFS vs. FSx: Comparing AWS File System Services 2026<\/a><\/p>\n<p><strong>What is cgroup v2?<\/strong> Control Groups Version 2 (cgroup v2) is the Linux kernel mechanism for resource control of processes and containers. Unlike cgroup v1, cgroup v2 operates with a unified hierarchy instead of multiple parallel subsystem hierarchies \u2013 this simplifies resource accounting and enables more precise memory OOM control, pressure signaling, and I\/O latency control for container workloads.<\/p>\n<h2>cgroup v1 is gone \u2013 not deprecated, but removed<\/h2>\n<p>The key difference from previous announcements: The Kubernetes project hasn&#8217;t deprecated cgroup v1, but removed it outright. There&#8217;s no &#8220;deprecation grace period&#8221; for 1.36. Anyone upgrading without first migrating all nodes to cgroup v2 will fail to upgrade.<\/p>\n<p>Specifically: kubelet and the container runtime (containerd, CRI-O) expect cgroup v2 as an active kernel feature on every node. On nodes still running in cgroup v1 mode, kubelet won&#8217;t start after the upgrade. This particularly affects organizations still running older RHEL 8 or Ubuntu 20.04 nodes \u2013 both systems use cgroup v1 by default.<\/p>\n<div style=\"background:#f0f7ff;border-radius:8px;padding:24px 28px;margin:28px 0;\">\n<p style=\"margin:0 0 14px 0;font-size:0.8em;font-weight:700;text-transform:uppercase;letter-spacing:0.15em;color:#0bb7fd;\">Migration status by distro<\/p>\n<table style=\"width:100%;border-collapse:collapse;font-size:0.88em;\">\n<tr style=\"background:#e8f4ff;\">\n<th style=\"padding:8px 12px;text-align:left;\">Distribution<\/th>\n<th style=\"padding:8px 12px;text-align:left;\">cgroup v2 default from<\/th>\n<th style=\"padding:8px 12px;text-align:left;\">Action required<\/th>\n<\/tr>\n<tr>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">RHEL 9 \/ Rocky 9 \/ Alma 9<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">from release (2022)<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">None \u2013 already on cgroup v2<\/td>\n<\/tr>\n<tr style=\"background:#f8fbff;\">\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">RHEL 8 \/ CentOS 8<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">Not default<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">OS upgrade to RHEL 9 or manual activation<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">Ubuntu 22.04 LTS<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">from release (2022)<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">None \u2013 already on cgroup v2<\/td>\n<\/tr>\n<tr style=\"background:#f8fbff;\">\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">Ubuntu 20.04 LTS<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">Not default<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">Set systemd kernel parameter or upgrade to 22.04<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">SLES 15 SP5+<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">from SP5<\/td>\n<td style=\"padding:8px 12px;border-top:1px solid #dce8f5;\">None from SP5 \u2013 check older SPs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<blockquote style=\"border-left:none;background:#f9f9f9;padding:20px 24px;border-radius:8px;margin:28px 0;\">\n<p style=\"margin:0 0 8px 0;font-size:0.95em;color:#003340;font-style:italic;\">&#8220;The decision to remove cgroup v1 entirely instead of deprecating it reflects the maturity of cgroup v2 in the kernel and in container runtimes. There&#8217;s no technical reason to stay on v1.&#8221;<\/p>\n<p style=\"margin:0;font-size:0.82em;color:#666;\">Kubernetes SIG-Node, Release Notes 1.36<\/p>\n<\/blockquote>\n<h2>Dynamic Resource Allocation (DRA) Stable: What it Means for GPU Workloads<\/h2>\n<p>Dynamic Resource Allocation has transitioned from beta to stable in version 1.36. DRA solves a fundamental problem with GPU and accelerator workloads: device plugins like the NVIDIA device plugin have so far implemented a static 1:1 mapping of GPU slots to pods. Multiple pods couldn&#8217;t share a GPU in a structured way. With DRA, cluster administrators can granularly allocate GPU resources via ResourceClasses and ResourceClaims \u2013 one GPU slice for an inference pod, another for a training job.<\/p>\n<div style=\"display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:28px 0;\">\n<div style=\"background:#e8f5e9;border-radius:8px;padding:20px 24px;\">\n<p style=\"font-size:0.75em;font-weight:700;text-transform:uppercase;letter-spacing:0.12em;color:#2e7d32;margin:0 0 12px 0;\">DRA Benefits for Enterprise<\/p>\n<ul style=\"margin:0;padding-left:20px;line-height:1.9;color:#333;font-size:0.9em;\">\n<li>GPU sharing without NVIDIA MIG hardware requirements<\/li>\n<li>ResourceClaims are namespaced \u2013 multi-tenant capable<\/li>\n<li>Better utilization of expensive accelerator hardware<\/li>\n<li>Declarative configuration instead of device plugin hacks<\/li>\n<\/ul>\n<\/div>\n<div style=\"background:#fce8e6;border-radius:8px;padding:20px 24px;\">\n<p style=\"font-size:0.75em;font-weight:700;text-transform:uppercase;letter-spacing:0.12em;color:#b71c1c;margin:0 0 12px 0;\">Migration Requires<\/p>\n<ul style=\"margin:0;padding-left:20px;line-height:1.9;color:#333;font-size:0.9em;\">\n<li>Existing device plugins must be migrated to the DRA API<\/li>\n<li>NVIDIA device plugin v0.17+ required for DRA compatibility<\/li>\n<li>Scheduler and kubelet must have DRA feature gate enabled<\/li>\n<li>No automatic migration path from old device plugin deployments<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h2>What Enterprise Teams in DACH Need to Check Now<\/h2>\n<div style=\"background:#f9f9f9;border-radius:8px;padding:24px 28px;margin:28px 0;\">\n<p style=\"margin:0 0 14px 0;font-size:0.8em;font-weight:700;text-transform:uppercase;letter-spacing:0.15em;color:#0bb7fd;\">Kubernetes 1.36 Upgrade Checklist<\/p>\n<ol style=\"margin:0;padding-left:22px;line-height:2.0;color:#333;font-size:0.9em;\">\n<li>Check all worker nodes for cgroup v2: <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">stat -fc %T \/sys\/fs\/cgroup\/<\/span> must return <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">cgroup2fs<\/span><\/li>\n<li>Check container runtime version: containerd 1.7+ and CRI-O 1.28+ support cgroup v2 natively<\/li>\n<li>Check managed cluster: EKS, GKE, and AKS migrate nodes automatically during Kubernetes version upgrade<\/li>\n<li>Self-managed cluster: rotate or manually migrate all nodes before upgrade<\/li>\n<li>Check NVIDIA device plugin version if GPU workloads are in use<\/li>\n<\/ol>\n<\/div>\n<p><em style=\"font-size:0.85em;color:#555;\">Source: Kubernetes Blog, Kubernetes 1.36 Release Notes, CNCF TAG-Runtime, NVIDIA Blog April 2026.<\/em><\/p>\n<div style=\"background:#f4f8ff;border-radius:8px;padding:20px 24px;margin:32px 0;\">\n<p style=\"margin:0 0 12px 0;font-size:0.78em;font-weight:700;text-transform:uppercase;letter-spacing:0.14em;color:#0bb7fd;\">More from the MBF Media Network<\/p>\n<ul style=\"margin:0;padding-left:20px;line-height:1.9;color:#333;font-size:0.9em;\">\n<li><a href=\"https:\/\/www.securitytoday.de\/2026\/05\/03\/ivanti-epmm-zero-days-cve-2025-4427-und-cve-2025-4428-was-kritis-betreiber-jetzt-tun-muessen\/\">SecurityToday: Ivanti EPMM Zero-Days \u2013 What KRITIS Operators Need to Do Now<\/a><\/li>\n<li><a href=\"https:\/\/www.digital-chiefs.de\/smart-city-governance-2026-was-cios-aus-dem-deutschen-staedte-rueckstand-bei-digitaler-infrastruktur-fuer-ihre-eigene-organisation-lernen\/\">Digital Chiefs: Smart City Governance 2026 \u2013 CIO Learnings from German Cities&#8217; Digital Infrastructure Backlog<\/a><\/li>\n<li><a href=\"https:\/\/mybusinessfuture.com\/ifat-und-circular-economy-als-mittelstands-pflichtaufgabe-was-der-clean-industrial-deal-fuer-produktionsbetriebe-ab-2027-bedeutet\/\">MyBusinessFuture: Clean Industrial Deal \u2013 What Production Companies Need to Implement from 2027<\/a><\/li>\n<\/ul>\n<\/div>\n<h2>Frequently Asked Questions<\/h2>\n<details>\n<summary><strong>Can I still enable cgroup v1 under Kubernetes 1.36?<\/strong><\/summary>\n<p style=\"margin:8px 0 4px 24px;color:#555;line-height:1.6;\">No. With Kubernetes 1.36, the cgroup v1 code is completely removed from kubelet and the internal Kubernetes libraries. There is no feature gate that would reactivate cgroup v1. Those who stay on 1.35 or older can continue to use cgroup v1, but an upgrade to 1.36+ requires cgroup v2 on all nodes.<\/p>\n<\/details>\n<details>\n<summary><strong>How can I check if my nodes are already using cgroup v2?<\/strong><\/summary>\n<p style=\"margin:8px 0 4px 24px;color:#555;line-height:1.6;\">On each node: <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">stat -fc %T \/sys\/fs\/cgroup\/<\/span>. If it returns <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">cgroup2fs<\/span>, it means cgroup v2 is active. If it returns <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">tmpfs<\/span>, it still means cgroup v1. Alternatively: <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">cat \/proc\/1\/cgroup<\/span> \u2013 if all entries converge into a single line with <span style=\"font-family:monospace;background:#f4f4f4;padding:1px 5px;border-radius:3px;font-size:0.92em;\">0::\/<\/span>, the system is using cgroup v2 unified.<\/p>\n<\/details>\n<details>\n<summary><strong>Does the cgroup v1 removal also affect managed Kubernetes on AWS\/GCP\/Azure?<\/strong><\/summary>\n<p style=\"margin:8px 0 4px 24px;color:#555;line-height:1.6;\">For EKS, GKE, and AKS, the node migration to cgroup v2 is automatically performed by the cloud provider during the Kubernetes version upgrade \u2013 new node pools or managed node groups rotate to cgroup v2-capable base images. Problematic are self-managed node groups or spot instance pools with custom AMIs that still run on Ubuntu 20.04 or Amazon Linux 2 (without cgroup v2 configuration).<\/p>\n<\/details>\n<details>\n<summary><strong>When should I start upgrading to 1.36?<\/strong><\/summary>\n<p style=\"margin:8px 0 4px 24px;color:#555;line-height:1.6;\">Only after complete cgroup v2 validation of all worker nodes in the cluster. The recommended path: Upgrade staging clusters, monitor all workloads for 2 weeks, then perform a rolling upgrade of production clusters node by node. For managed clusters with auto-upgrade: Open the auto-upgrade window only after validated node compatibility.<\/p>\n<\/details>\n<details>\n<summary><strong>What changes for teams operating GPU workloads with the NVIDIA device plugin?<\/strong><\/summary>\n<p style=\"margin:8px 0 4px 24px;color:#555;line-height:1.6;\">The classic NVIDIA device plugin continues to work in Kubernetes 1.36 \u2013 it uses the device plugin API, not DRA. Those who want to migrate from device plugin to DRA need NVIDIA device plugin v0.17+ and must redefine ResourceClasses and ResourceClaims for their GPU workloads. The migration is optional but recommended for multi-tenant GPU clusters that need to share accelerator hardware.<\/p>\n<\/details>\n<p style=\"text-align:right;font-style:italic;color:#666;font-size:0.85em;\"><em>Source title image: Pexels | Fact basis: Kubernetes Blog, CNCF, NVIDIA Developer Blog<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<span class=\"evm-reading-time\" style=\"display:inline-block;padding:3px 12px;border-radius:14px;background:#0bb7fd;color:#fff;font-size:0.78em;font-weight:600;letter-spacing:0.02em;line-height:1.4;vertical-align:middle;\">~6 Min. Lesezeit<\/span><span class=\"evm-meta-sep\" style=\"display:inline-block;margin:0 8px;color:#999;font-size:0.85em;vertical-align:middle;\">&#8211;<\/span> 6 Min. Reading Time Kubernetes 1.36 \u201cHaru\u201d has been generally available since April 22, 2026, and brings two changes that require immediate action for DACH enterprise clusters: cgroup v1 is not deprecated but completely removed \u2013 Dynamic Resource Allocation for GPU workloads is now stable. Anyone still running on cgroup v1 can no longer perform&#8230; <a class=\"view-article\" href=\"https:\/\/www.cloudmagazin.com\/en\/2026\/05\/08\/kubernetes-1-36-haru-ist-ga-was-die-cgroup-v1-abschaltung\/\">&raquo; Artikel<\/a>","protected":false},"author":98,"featured_media":39170,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Kubernetes 1.36 fully removes cgroup v1\u2014no upgrade without migration. DRA for GPU workloads is stable. Checklist for DACH enterprise clusters.","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_meta-robots-adv":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_opengraph-image":"","_yoast_wpseo_opengraph-image-id":0,"_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","_yoast_wpseo_twitter-image":"","_yoast_wpseo_twitter-image-id":0,"ngg_post_thumbnail":0,"pre_headline":"","bildquelle":"","teasertext":"","language":"de","footnotes":""},"categories":[13],"tags":[],"industry":[],"class_list":["post-40179","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aktuelles"],"evm_reading_time_minutes":6,"wpml_language":"en","wpml_translation_of":39166,"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DRA Stability Forces GPU Workloads to Reimagine Themselves - cloudmagazin<\/title>\n<meta name=\"description\" content=\"Kubernetes 1.36 fully removes cgroup v1\u2014no upgrade without migration. 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