Kubernetes - Monitoring and Logging
You installed Metrics Server but
kubectl top nodes returns no metrics. What is a common cause?You installed Metrics Server but kubectl top nodes returns no metrics. What is a common cause?
medium📝 Troubleshoot Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Check Metrics Server permissions
Metrics Server needs proper RBAC permissions to access metrics API data.Step 2: Understand other options
kubectl version usually doesn't block metrics, clusters have nodes, and Metrics Server is deployed as Deployment, not DaemonSet.Final Answer:
Metrics Server lacks permissions to access metrics API -> Option BQuick Check:
Missing RBAC permissions cause no metrics [OK]
Quick Trick: Check Metrics Server RBAC permissions if no metrics shown [OK]
Common Mistakes:
- Blaming kubectl version instead of permissions
- Assuming no nodes exist in cluster
- Confusing Deployment with DaemonSet for Metrics Server
Master "Monitoring and Logging" in Kubernetes
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