EKS - Ingress

To expose your Nginx application using the Nginx Ingress Controller, follow these steps:

1. Install Nginx Ingress Controller

The Nginx Ingress Controller is required to manage incoming traffic. If it's not already installed, deploy it:

For Bare Metal or Minikube

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

For Cloud Providers (EKS, AKS, GKE)

If using a cloud provider, use Helm:

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update
helm install nginx-ingress ingress-nginx/ingress-nginx --set controller.publishService.enabled=true

Check if the ingress controller is running:

kubectl get pods -n ingress-nginx
kubectl get svc -n ingress-nginx

The LoadBalancer or NodePort IP from the output is the external IP for accessing your application.

2. Deploy the Nginx Application

Ensure your Nginx deployment exists, or create one:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

Apply the deployment:

kubectl apply -f nginx-deployment.yaml

3. Create a Service for Nginx

Expose the deployment using a ClusterIP service:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
  type: ClusterIP

Apply the service:

kubectl apply -f nginx-service.yaml

4. Create an Ingress Resource

Define an Ingress to route traffic to the Nginx service:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx
  rules:
  - host: nginx.local
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: nginx-service
            port:
              number: 80

Apply the Ingress:

kubectl apply -f nginx-ingress.yaml

5. Test the Ingress Route

If Using Minikube

Run:

minikube addons enable ingress
minikube tunnel

Then, add the following entry to your /etc/hosts file (Linux/macOS) or C:\Windows\System32\drivers\etc\hosts (Windows):

127.0.0.1  nginx.local

If Using a Cloud Provider

Get the EXTERNAL IP of the Ingress Controller:
```
kubectl get svc -n ingress-nginx
```
Add the IP to your /etc/hosts:
```
<EXTERNAL_IP>  nginx.local
```

Access Nginx

Now, open your browser or run:

curl http://nginx.local

You should see the Nginx welcome page. 🎉