Bits of .NET

Manual scaling is reactive and slow. HPA automatically scales pods based on resource usage.

Create HPA:

kubectl autoscale deployment myapp \
  --cpu-percent=70 \
  --min=2 \
  --max=10

# When CPU > 70%, adds pods (up to 10)
# When CPU < 70%, removes pods (down to 2)

YAML Version:

apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: myapp-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: myapp
  minReplicas: 2
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70

Check Status: kubectl get hpa

Automatic scaling saves money and handles traffic spikes!