Scaling

The number of Pods a Deployment runs is its replica count, and you can change it at any time:

kubectl scale deployment web --replicas=3

Kubernetes answers deployment.apps/web scaled and starts two more Pods. kubectl get pods now shows three, each with its own generated name.

Scaling down works the same way: ask for fewer replicas and the extra Pods are deleted. You can also choose the count when creating the Deployment:

kubectl create deployment web --image=nginx --replicas=2

The Deployment table shows the effect at a glance: READY 3/3 means all three replicas are up. Scaling is how you handle more traffic without changing anything about the application itself.