CAST AI incident
Degraded: CAST AI node provisioning issues on AKS with Kubernetes 1.36
CAST AI is currently experiencing a major incident affecting EU Node Autoscaler and Node Autoscaler, which began 2h ago. The vendor's full update timeline is below.
Affected components
Update timeline
- identified Jun 16, 2026, 11:14 AM UTC
Status: Identified CAST AI node provisioning fails on AKS clusters running Kubernetes 1.36.0 or above. This is caused by Azure removing support for Ubuntu 22.04 (the OS currently used by CAST AI for AKS worker nodes) on Kubernetes 1.36+. Impact: Clusters upgraded to Kubernetes 1.36 on AKS will be unable to provision new nodes via CAST AI. Workaround: Do not upgrade AKS control plane to Kubernetes 1.36 until further notice. Next update: We are working on Ubuntu 24.04 support / temporary workaround and will provide an update once a fix is available. Affected components EU Node Autoscaler (Degraded performance) Node Autoscaler (Degraded performance)