Deploying a Reddit Clone App on Kubernetes with Ingress and Minikube

Essentials: First You have to install some essential packages for this deployment. You can find the essential here.

Step 1: Clone the source code

To begin, clone the source code for the application by executing the following command:

git clone https://github.com/BSatishSutar/reddit-clone-k8s-ingress.git

Step 2: Containerize the Application using Docker

Create a Dockerfile with the following sophisticated code:

FROM node:19-alpine3.15

WORKDIR /reddit-clone

COPY . /reddit-clone

RUN npm install 

EXPOSE 3000

CMD ["npm", "run", "dev"]

Step 3) Building Docker-Image

Next, build the Docker image from the Dockerfile using the command:

docker build -t <DockerHub_Username>/<Imagename> .

Ensure you replace <DockerHub_Username> and <Imagename> with appropriate values.

Step 4) Push the Image to DockerHub

Push the Docker image to DockerHub so that the Deployment file can pull the image and run the app in Kubernetes pods. Follow these steps:

1. Log in to your DockerHub account using the command: docker login and provide your username and password.

2. Push the image to DockerHub using the command: docker push <DockerHub_Username>/<Imagename>

Alternatively, you can use an existing Docker image, such as satishsutar1111/reddit-clone:tagname, for deployment.

Step 5) Write a Kubernetes Manifest File

Now, let's create a Kubernetes manifest file that describes the deployment and service for the application. The manifest file enables version control and ensures a repeatable deployment process.

Create a Deployment.yml file with the following sophisticated code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: reddit-clone-deployment
  labels:
    app: reddit-clone
spec:
  replicas: 2
  selector:
    matchLabels:
      app: reddit-clone
  template:
    metadata:
      labels:
        app: reddit-clone
    spec:
      containers:
      - name: reddit-clone
        image: satishsutar1111/reddit-clone
        ports:
        - containerPort: 3000

Create a Service.yml file with the following code:

apiVersion: v1
kind: Service
metadata:
  name: reddit-clone-service
  labels:
    app: reddit-clone
spec:
  type: NodePort
  ports:
  - port: 3000
    targetPort: 3000
    nodePort: 31000
  selector:
    app: reddit-clone

Step 6) Deploy the app to Kubernetes & Create a Service

With the deployment and service manifest files ready, you can now deploy the app to Kubernetes. Execute the following commands:

kubectl apply -f Deployment.yml
kubectl apply -f Service.yml

To verify the deployment and service, you can use the commands kubectl get deployment and kubectl get services.

Step 7) Configure Ingress

Ingress provides rules for inbound connections to access Kubernetes cluster services. To configure Ingress, create an ingress.yml file and add the following sophisticated code:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-reddit-app
spec:
  rules:
  - host: "domain.com"
    http:
      paths:
      - pathType: Prefix
        path: "/test"
        backend:
          service:
            name: reddit-clone-service

            port:
              number: 3000
  - host: "*.domain.com"
    http:
      paths:
      - pathType: Prefix
        path: "/test"
        backend:
          service:
            name: reddit-clone-service
            port:
              number: 3000

By executing the command minikube addons enable ingress, you can enable Ingress on Minikube. Use kubectl apply -f ingress.yml to apply the Ingress settings. To verify the Ingress resource, use kubectl get ingress ingress-reddit-app.

Step 8) Expose the app

To expose the deployment, use the command kubectl expose deployment reddit-clone-deployment --type=NodePort. You can test the deployment by executing curl -L http://192.168.49.2:31000, where 192.168.49.2 is the Minikube IP and 31000 is the defined port in Service.yml.

Next, expose the app service using kubectl port-forward svc/reddit-clone-service 3000:3000 --address 0.0.0.0.

Test Ingress

To test the Ingress configuration, use the command curl -L domain/test in the terminal. Additionally, you can access the deployed application using "publicip:3000".

Note: Ensure that port 3000 is open in the security group of your EC2 instance.

Congratulations!

You have successfully deployed a Reddit clone on Kubernetes with Ingress enabled.