Nova Hypervisor Resource Exhaustion Detection
criticalResource ContentionUpdated Nov 5, 2025
Detect compute node resource exhaustion before instance provisioning failures occur by monitoring hypervisor resource metrics alongside scheduler errors.
Sources
How to detect:
Monitor the gap between total and used resources (RAM, vCPUs, disk) on hypervisors. Alert when available resources drop below thresholds or when 'No valid host found' errors appear in nova-scheduler logs alongside high resource utilization.
Recommended action:
Scale out compute capacity, rebalance workloads across hypervisors, or adjust scheduler filters. Check for scheduling inefficiencies causing uneven distribution.