OBS-001.md

OBS-001 metrics-server not deployed

Summary

When the cluster has no metrics-server or it is not ready, kubectl top and HPA resource metrics (CPU/memory) are unavailable. Autoscaling and resource monitoring based on usage cannot work.

Severity

Warning

Example

N/A

Symptoms

• Report shows metrics-server is missing or not ready
• No metrics-server pods Ready in kube-system

Resolution

1. Deploy metrics-server using the official manifest or Helm chart
2. Ensure it can reach kubelet metrics port (e.g. 10250) and resolve TLS/network policy
3. Verify: kubectl top nodes and kubectl top pods -n <namespace>
4. If using HPA, ensure HPA can get resource metrics after metrics-server is ready

References

• metrics-server
• HPA and metrics