Scaling an application using Kubernetes involves using the Kubernetes API to create, modify, and delete objects such as Pods, Deployments, and Services.
For example, if you wanted to scale an application running in a Deployment, you could use the Kubernetes API to increase the number of replicas in the Deployment.
You could use the command line tool ‘kubectl’ to do this:
$ kubectl scale deployment –replicas=
This command will scale the Deployment to the desired number of replicas. Kubernetes will then create the necessary Pods to match the desired number of replicas.