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Scenario #86
Cluster Management
K8s v1.20, GKE
Cluster Autoscaler Not Scaling Up
The cluster autoscaler failed to scale up the node pool despite high resource demand.
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What Happened
The cluster autoscaler did not add nodes when resource utilization reached critical levels.
Diagnosis Steps
- 1Checked the autoscaler logs and found that scaling events were not triggered.
- 2Reviewed the node pool configuration and autoscaler settings.
Root Cause
The autoscaler was not configured with sufficient thresholds or permissions to scale up the node pool.
Fix/Workaround
• Adjusted the scaling thresholds in the autoscaler configuration.
• Verified the correct IAM permissions for the autoscaler to scale the node pool.Lessons Learned
Ensure the cluster autoscaler is correctly configured and has the right permissions.
How to Avoid
- 1Regularly review cluster autoscaler configuration and permissions.
- 2Monitor scaling behavior to ensure it functions as expected during high load.