How to fix unable to get metrics for resource cpu: no metrics returned from resource metrics API in Kubernetes

kubectl get deployment metrics-server -n kube-system
kubectl get pods -n kube-system -l k8s-app=metrics-server
kubectl logs -n kube-system -l k8s-app=metrics-server

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

kubectl top nodes
kubectl top pods -n <namespace>

resources:
  requests:
    cpu: 100m           # REQUIRED for HPA
    memory: 128Mi       # REQUIRED for HPA
  limits:
    cpu: 500m
    memory: 512Mi

kubectl get pods -n <namespace> -o wide
kubectl describe pod <pod-name> -n <namespace> | grep -A5 "Conditions"

kubectl get hpa -n <namespace>
kubectl describe hpa <hpa-name> -n <namespace>

kubectl get hpa <hpa-name> -n <namespace> --watch

# Generate load for testing
kubectl run -it --rm load -- busybox sh -c "while true; do wget -q -O- http://<service>; done"

# Monitor pod creation
kubectl get pods -n <namespace> --watch

# Verify custom metrics adapter is running
kubectl get deployment -n custom-metrics

# Test custom metric availability
kubectl get --raw "/apis/custom.metrics.k8s.io/v1beta1" | jq