Official documentation: https://kubernetes.github.io/ingress-nginx/deploy/

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Step 1: Add the Ingress-NGINX Helm repository (if not already added)

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update

kubectl create namespace ingress-nginx

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Step 3: Install Ingress-NGINX with Helm

Example with LoadBalancer (Hetzner Cloud). Create a file named values.yaml: 
controller:
  service:
    type: LoadBalancer
    externalTrafficPolicy: Local
    annotations:
      load-balancer.hetzner.cloud/location: hel1
Add to annotations following field:
  • load-balancer.hetzner.cloud/location - Hetzner network zone for LB placement
Finally, install ingress-nginx: 
helm install ingress-nginx ingress-nginx/ingress-nginx \
  --namespace ingress-nginx \
  -f values.yaml
Load balancer will be created automalically: security

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Step 4: Verify installation

Check if the pods are running correctly: 
kubectl get pods --namespace ingress-nginx
Check the service status: 
kubectl get svc --namespace ingress-nginx
Wait for EXTERNAL-IP if you’re using a cloud-based load balancer.

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Step 5: Use Ingress Resources

After installation, you can create Ingress resources in your applications: Example Ingress resource: 
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
  namespace: your-app-namespace
spec:
  ingressClassName: nginx
  rules:
  - host: example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: your-service
            port:
              number: 80
Apply it with: 
kubectl apply -f example-ingress.yaml