~/talk

Beyond CAS: Why the world needs another Kubernetes Cluster Autoscaler

Talkat DevConf.CZ 2025 · 2025-06-12..06-14· [kubernetes, cloud-infrastructure]
slides:none on file

Built a IBM Cloud Karpenter provider and benchmarked it against Cluster Autoscaler across EKS and IKS using Terraform, Ansible, kube-burner, Prometheus and cloud billing APIs; experiments run four clusters (3 initial nodes, max 10), 1‑hour tests with a 20‑minute spike. Implementation faces IBM API sprawl and custom CRD work. Results show 33% fewer nodes on average, about 50% faster provisioning latency, and cost savings up to 33% on AWS and ~20–23% on IKS.

AI-written summary · about

  1. 0:00Research project intro
  2. 1:06Why autoscaling matters
  3. 4:01How Cluster Autoscaler works
  4. 6:52Introducing Carpenter
  5. 9:44Carpenter on IBM Cloud
  6. 11:31Benchmarking setup
  7. 13:59Automation with Ansible
  8. 15:50Workload simulation with Kube-burner
  9. 17:14Results and savings
  10. 18:40Does the world need it?
  11. 19:45Q&A
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