Beyond CAS - Why the World Needs Another Kubernetes Cluster Autoscaler

Learn about Karpenter as a modern alternative to Kubernetes' Cluster Autoscaler (CAS) in this 32-minute conference talk from DevConf.CZ 2025. Discover the limitations of traditional CAS that impact performance in various scenarios and explore how Karpenter addresses these challenges through real-time, workload-specific node provisioning. Examine the development process of a custom IBM Cloud Karpenter provider, including its architecture design, implementation challenges, and experimental outcomes. Analyze scientific benchmarking results comparing scaling efficiency, cost savings, and resource utilization between CAS and Karpenter across AWS and IBM Cloud platforms in different deployment scenarios. Gain practical insights for optimizing autoscaling strategies in cloud-native environments, making this session valuable for cloud architects and Kubernetes practitioners seeking to enhance their dynamic scaling capabilities.