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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Unable to Autoscale K8s in CS 4.21.0.0","articleBody":"Hello,\n\nI have deployed K8s cluster in my CS 4.21.0.0 environment and I am trying to Autoscale the same to add a worker node and I am seeing below message in management server logs.\n\n```\n2025-11-05 16:07:17,543 INFO  [c.c.k.c.a.KubernetesClusterScaleWorker] (API-Job-Executor-34:[ctx-228e86cd, job-1437, ctx-43619b99]) (logid:56268dc3) Scaling Kubernetes cluster KubernetesCluster {\"id\":71,\"name\":\"CL8S\",\"uuid\":\"da626491-7457-4106-a165-de0d41d2417a\"}\n2025-11-05 16:07:17,553 WARN  [c.c.k.c.a.KubernetesClusterScaleWorker] (API-Job-Executor-34:[ctx-228e86cd, job-1437, ctx-43619b99]) (logid:56268dc3) Scaling Kubernetes cluster : CL8S failed, scaling Kubernetes cluster with running VMs on hypervisor KVM is not supported!\n2025-11-05 16:07:17,553 INFO  [c.c.k.c.a.KubernetesClusterScaleWorker] (API-Job-Executor-34:[ctx-228e86cd, job-1437, ctx-43619b99]) (logid:56268dc3) Revoking launch permission for systemVM template\n2025-11-05 16:07:17,648 INFO  [o.a.c.f.j.i.AsyncJobMonitor] (API-Job-Executor-34:[ctx-228e86cd, job-1437]) (logid:56268dc3) Remove job-1437 from job monitoring\n\n```\n\nI am having a hypevisor as KVM which is running on Ubuntu 24.04.3.\n\nCan anyone help figure out why I am facing this problem and whether KVM is really not supported for CKS Autoscale Feature ? if not, then which hypevisor is supported for Autoscale ?\n\n\nRegards,\nAmit Vyas","author":{"url":"https://github.com/amitmvyas","@type":"Person","name":"amitmvyas"},"datePublished":"2025-11-05T19:34:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":15},"url":"https://github.com/11994/cloudstack/issues/11994"}