Kubernetes Configuration Files for Horizontal Pod Autoscaler (HPA)

Overview

This repository contains Kubernetes manifests to demonstrate the configuration of the Horizontal Pod Autoscaler (HPA). HPA automatically scales the number of pod replicas in a deployment based on observed CPU utilization or other select metrics.

Files

• deployment.yaml: Defines the Deployment resource for the application.
• service.yaml: Specifies the Service resource to expose the application.
• ingress.yaml: Configures Ingress resource for external access to the application.
• k8s_hpa.yaml: Contains the HPA configuration to enable automatic scaling.

Prerequisites

• A running Kubernetes cluster.
• kubectl configured to interact with your cluster.
• Metrics Server installed in the cluster to provide resource utilization metrics.

Usage

1. Deploy the Application:

   Apply the Deployment and Service manifests to deploy the application:

   kubectl apply -f deployment.yaml
   kubectl apply -f service.yaml

2. Configure Ingress (Optional):

   If you have an Ingress controller set up and wish to expose the application externally, apply the Ingress manifest:

   kubectl apply -f ingress.yaml

3. Set Up Horizontal Pod Autoscaler:

   Apply the HPA configuration to enable automatic scaling:

   kubectl apply -f k8s_hpa.yaml

4. Verify HPA Status:

   Check the status of the HPA to ensure it's monitoring the application's metrics:

   kubectl get hpa

   For detailed information:

   kubectl describe hpa

Customization

• Deployment: Modify deployment.yaml to change the application's image, resource requests, and limits.
• HPA Configuration: Adjust k8s_hpa.yaml to set different metrics, utilization thresholds, or replica counts as needed.