Scaling an Application in Kubernetes

There is a built-in way of scaling an application horizontally on a Kubernetes cluster. You can utilize the native Kubernetes resource deployment for scaling your application quickly. When you create a deployment object, you need to provide a value for the number of replicas. Once the deployment is applied to the cluster, it will generate a Replication Controller, which is responsible for controlling the number of replicas created by this deployment. Each replica represents a rod that includes the application containers. When you change this value for the number of replicas, it will be automatically reflected on the cluster, either by deleting the existing pods or by creating new ones. In this way, scalability is handled out of the box by Kubernetes.

While creating new pods, Kubernetes also ensures there are enough resources on nodes before scheduling a pod to them. In this way, a pod is only scheduled if there are enough resources for it to...