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Learn how to resolve the issue of being unable to access your Node.js server tunneled via Ingress in Kubernetes. Follow our step-by-step guide!
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This video is based on the question https://stackoverflow.com/q/65300312/ asked by the user 'Mr-Programer' ( https://stackoverflow.com/u/10701530/ ) and on the answer https://stackoverflow.com/a/65303149/ provided by the user 'Debasis Das' ( https://stackoverflow.com/u/11253637/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Ingress-Nginx Access Issues with Kubernetes in Node.js

When working with Kubernetes, particularly with Ingress-Nginx, you may encounter issues accessing your server. If you're trying to reach a backend service through a defined URL, you might experience a failure where your route does not respond as expected. In this guide, we will explore a recent issue faced by a user attempting to access a Node.js server through Kubernetes and provide a systematic solution to resolve it.

The Problem

In this scenario, the user is unable to access their Node.js server via the route https://ticketing.dev/api/user/curren..., despite the server working correctly when accessed directly through localhost on port 4000. The user had set up their Kubernetes configuration, including a skaffold.yaml, a deployment and service YAML for the Node.js application, and an Ingress configuration.

Environment Setup

The user’s configuration included:

A skaffold.yaml to define the build and deployment process.

Deployment setup for the app including a service that listens on port 4000.

An Ingress resource with the name minimal-ingress configuring the routing based on the host ticketing.dev.

However, there was a configuration oversight causing the application to be unreachable through the specified domain.

Solution Steps

To resolve the access issue, the following steps should be taken:

Step 1: Obtain Minikube IP

First, you need to acquire the internal IP address of your Minikube cluster. This can be easily done through your command-line terminal:

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For example, this command might return an IP address like 172.17.0.2.

Step 2: Edit the Hosts File

You need to modify your /etc/hosts file so that your domain ticketing.dev points to the Minikube IP rather than the default loopback address (127.0.1.1). This crucial change allows your local machine to recognize the domain as being addressed to your Minikube instance.

Follow these steps:

Open your terminal and type the following command to edit the hosts file:

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Locate the line that reads:

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Replace it with:

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(Substitute 172.17.0.2 with the actual IP address returned by the minikube ip command.)

Step 3: Verify the Changes

After updating the hosts file, it’s a good practice to check that the change took effect. Try accessing your route again via a web browser or a tool like Postman:

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If everything was done correctly, your Node.js server should now respond properly as it routes through your Ingress-Nginx configuration.

Conclusion

Accessing a service through Ingress-Nginx in Kubernetes comes with its own set of challenges. However, by ensuring that your /etc/hosts file correctly points to the Minikube IP, the issue can be resolved effectively. We hope this guide helps you troubleshoot similar issues in your Kubernetes setup effectively. Happy coding!