Setting Up Kubernetes Ingress on AWS EKS

In this blog post, we will walk through the steps to configure Kubernetes Ingress on AWS EKS (Elastic Kubernetes Service). Ingress is an API object that manages external access to services within a Kubernetes cluster. We will be using the Nginx Ingress Controller for this demonstration

Kubernetes Ingress is a powerful tool for managing external access to services within a Kubernetes cluster. In this tutorial, we will walk through the process of setting up Kubernetes Ingress on an Amazon Elastic Kubernetes Service (EKS) cluster. We will create and configure an Ingress Controller, deploy two sample applications, and configure path-based routing using Ingress resources.

To clone the content of the repository "https://github.com/BalajiiBharath/kubernetes-ingress.git" for your blog, you can follow these steps:

Run the following command to clone the repository:

git clone https://github.com/BalajiiBharath/kubernetes-ingress.git

Step 1: Configure Ingress Controller

Create a namespace for the Ingress Controller:

kubectl create ns ingress-nginx

2. Deploy the Ingress Controller using the provided YAML file:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.2.1/deploy/static/provider/cloud/deploy.yaml

To check all the Ingress Controller resources using the kubectl get all -n ingress-nginx command, you can include the following content

kubectl get all -n ingress-nginx

Step 2: Deploy Sample Applications

Deploy the Nginx Application

Next, we will deploy two example services to test the Ingress functionality. We will deploy an Nginx service and an Apache service.

Create a file named onedeploy.yml and add the following YAML:

 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
         ports:
         - containerPort: 80
         env:
         - name: TITLE
           value: "NGINX APP1"
 ---
 apiVersion: v1
 kind: Service
 metadata:
   name: nginx
 spec:
   type: ClusterIP
   ports:
   - port: 80
   selector:
     app: nginx

Apply the deployment using the following command:

kubectl apply -f onedeploy.yml

Deploy the Apache Httpd Application

Repeat the same steps for the Apache service by creating a file named twodeploy.yml with the following YAML:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: httpd
spec:
  replicas: 1
  selector:
    matchLabels:
      app: httpd
  template:
    metadata:
      labels:
        app: httpd
    spec:
      containers:
      - name: httpd
        image: httpd
        ports:
        - containerPort: 80
        env:
        - name: TITLE
          value: "APACHE APP2"
---
apiVersion: v1
kind: Service
metadata:
  name: httpd
spec:
  type: ClusterIP
  ports:
  - port: 80
  selector:
    app: httpd

Apply the deployment using the following command:

kubectl apply -f twodeploy.yml

To verify that the deployments and services are running, use the following commands:

kubectl get deploy
kubectl get svc
kubectl get pods

Step 3: Configure Path-Based Routing with Ingress

Now, we will deploy the Ingress resource to route traffic to the respective services.

Create a file named ingress-resource.yml and add the following YAML:Now, we will deploy the Ingress resource to route traffic to the respective services.

Create a file named ingress-resource.yml and add the following YAML:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: k8s-ingress
  annotations:
    nginx.ingress.kubernetes.io/ssl-redirect: "false"
    nginx.ingress.kubernetes.io/use-regex: "true"
    nginx.ingress.kubernetes.io/rewrite-target: /$2
spec:
  ingressClassName: nginx
  rules:
  - http:
      paths:
      - path: /nginx(/|$)(.*)
        pathType: Prefix
        backend:
          service:
            name: nginx
            port:
              number: 80
      - path: /httpd(/|$)(.*)
        pathType: Prefix
        backend:
          service:
            name: httpd
            port:
              number: 80
      - path: /(.*)
        pathType: Prefix
        backend:
          service:
            name: nginx
            port:
              number: 80

Apply the Ingress using the following command:

kubectl apply -f ingress-resource.yml

Step 4: Verify and Access the Ingress

To check the status of the Ingress, use the following command:
```
 kubectl get ing
```
After a few minutes, the Ingress will be provisioned, and you will see an address associated with it.

To access the services through the Ingress, use the load balancer DNS name provided by your cloud provider.

To check all the Ingress controller resources for the ingress-nginx namespace and display the output in the form of a table, you can use the following command:

kubectl get service ingress-nginx

This command will list all the Ingress resources and Services in the ingress-nginx namespace. The output will include information such as the name, namespace, and other details of each resource.

Access the Nginx application:

http://<Ingress_IP_or_DNS>/nginx

Access the Apache Httpd application:

http://<Ingress_IP_or_DNS>/httpd

Congratulations! You have successfully configured Kubernetes Ingress on AWS EKS. Ingress allows you to route traffic to different services based on the defined rules. This provides a flexible and scalable way to expose your applications to the outside world.

Certainly, here are the steps to delete all the resources you've created based on the previous steps:

Step 1: Delete Ingress Controller and Namespace

Delete the Ingress Controller deployment:

 kubectl delete -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.2.1/deploy/static/provider/cloud/deploy.yaml

Delete the Ingress Controller namespace:
```
 kubectl delete ns ingress-nginx
```

Step 2: Delete Sample Applications

Delete the Nginx deployment and service:
```
 kubectl delete -f onedeploy.yml
```
Delete the Apache Httpd deployment and service:
```
 kubectl delete -f twodeploy.yml
```

Step 3: Delete Ingress Resource

Delete the Ingress resource:

 kubectl delete -f ingress-resource.yml

By following these steps, you will remove all the resources you previously created. Please be cautious while performing deletions to avoid accidental loss of important data

Balaji S