Scaling

Scale a Deployment

Imperative scale is fine for labs.

kubectl scale deployment web --replicas=3
kubectl get pods -l app=web

Watch the rollout

New pods appear; surplus pods terminate when scaling down.

kubectl get pods -w

Autoscaling (awareness)

Horizontal Pod Autoscalers adjust replicas from metrics. Learn manual scaling first; add HPA when metrics are available in your cluster.

kubectl get hpa

Match capacity to need

More replicas need CPU/memory headroom on nodes. Local clusters are small—scale gently.