Kubernetes is a popular container orchestration platform that helps in managing and deploying containerized applications. However, deploying and managing applications in a Kubernetes environment requires a load balancer that can route traffic to the correct pod.
This is where Nginx Ingress Controller comes in. Nginx Ingress Controller is a popular open-source solution for load balancing and routing traffic in a Kubernetes environment. In this article, we will go through the step-by-step process of setting up Nginx Ingress Controller on Kubernetes.
Prerequisites
Before we dive into the setup process, you need to have the following prerequisites:
- A Kubernetes cluster
- kubectl command-line tool installed
- Helm package manager installed
Step 1: Add Nginx Ingress Controller repository
The first step in setting up Nginx Ingress Controller on Kubernetes is to add the Nginx Ingress Controller repository to your Helm.
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
Step 2: Install Nginx Ingress Controller
After adding the Nginx Ingress Controller repository, we can install Nginx Ingress Controller using the following Helm command.
helm install nginx-ingress ingress-nginx/ingress-nginx
Step 3: Verify the installation
After installing Nginx Ingress Controller, we can verify its installation using the following command.
kubectl get pods -n ingress-nginx
The output of the above command should show the Nginx Ingress Controller pods running.
Step 4: Create Ingress resource
Now that we have installed Nginx Ingress Controller, we need to create an Ingress resource that defines the routing rules for incoming traffic.
Here's an example Ingress resource that routes traffic to two different services based on the host name.
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: example-ingress
annotations:
nginx.ingress.kubernetes.io/rewrite-target: /
spec:
rules:
- host: example.com
http:
paths:
- path: /service1
pathType: Prefix
backend:
service:
name: service1
port:
name: http
- path: /service2
pathType: Prefix
backend:
service:
name: service2
port:
name: http
You can modify the above example according to your requirements and apply it using the following command.
kubectl apply -f <filename>
Step 5: Access the application
After creating the Ingress resource, you can access your application using the host name defined in the Ingress resource. In our example, you can access the application using the host name "example.com" and the paths "/service1" and "/service2".
Nginx Ingress Controller is a powerful and flexible solution for load balancing and routing traffic in a Kubernetes environment. In this article, we went through the step-by-step process of setting up Nginx Ingress Controller on Kubernetes. With this setup, you can easily route traffic to different services based on host name and path.
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That's it for this post. Keep practicing and have fun. Leave your comments if any.