Deploy Nginx Web Server on Kubernetes Cluster with Replicas

Introduction

Nginx is an open-source and free web server and reverse proxy server. It is designed to handle high traffic websites efficiently and reliably. Nginx is known for its low memory usage and ability to handle large numbers of concurrent connections with minimal resources.

Kubernetes is a free and open source container management tool, we can deploy and manage containerized applications across a cluster of nodes. It provides features such as automated rollouts and rollbacks, self-healing, load balancing, and scaling, all of which make it easier to manage and scale containerized applications.

In this post, We will show you how to deploy nginx web server on Kubernetes cluster.

Step 1: Creating Nginx Deployment YAML

We need to create the nginx web server deployment yaml config file and where we can update the replica count and image version and other things.

nano nginx-deployment.yaml

Paste the following configuration.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: nginx:latest
          imagePullPolicy: "IfNotPresent"
          ports:
            - containerPort: 80

Step 2: Deploy Nginx Web Server

We are good to deploy the nginx web server on k8s resources by following the given commands.

To deploy the nginx.

kubectl create -f nginx-deployment.yaml

To validate the deployment.

kubectl get deployment

To validate the pods.

kubectl get pods

Step 3: Deploy Nginx Service

We need to create the nginx service yaml config to make accessible nginx web server from network, Use the following command for the same.

nano nginx-service.yaml

Paste the following configuration.

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  labels:
    app: nginx
spec:
  type: LoadBalancer
  ports:
   - port: 80
  selector:
   app: nginx

We can replace the port number and network type as per your need.

To deploy the nginx service.

kubectl create -f nginx-service.yaml

To validate the nginx service.

kubectl get svc

Step 4: Accessing Nginx Web Server

We need to use the external IP address / dns name with port 80 to get nginx web server on the browser.

Step 5: Scaling Nginx Web Server

We need to edit and put the number of count of nginx replicas in the nginx-depoyment.yaml file.

To edit the nginx-deployment.yaml file.

nano nginx-deployment.yaml

Update the replica count like 5 online number 6.

  replicas: 5

To apply new change.

kubectl apply -f nginx-deployment.yaml

To validate the nginx running pods.

kubectl get pods

We can control the apache replicas count by using replicas count in nginx-deployment.yaml file.

Step 6: Clean Up

If we want to destroy the nginx resources, We can do that by following given commands.

To destroy nginx service.

kubectl delete svc nginx-service

To destroy nginx deployment.

kubectl delete deployment nginx

Conclusion

We have successfully deployed the nginx web server on the K8S cluster. If you are still facing problems, feel free to leave a commit.