Accessing Your Application in Kubernetes with NGINX Ingress

Описание: Learn how to effectively access your application using Kubernetes and NGINX Ingress. Stop facing connection issues and get your app up and running seamlessly!
---
This video is based on the question https://stackoverflow.com/q/63124560/ asked by the user 'RamPrakash' ( https://stackoverflow.com/u/11058704/ ) and on the answer https://stackoverflow.com/a/63125100/ provided by the user 'Serge' ( https://stackoverflow.com/u/3386551/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: kubernetes - nginx ingress - How to access

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Accessing Your Application in Kubernetes with NGINX Ingress

Are you having trouble accessing your application running in a Kubernetes (K8s) cluster using an NGINX ingress controller? This common issue leaves many developers scratching their heads. While NodePort might be working just fine, accessing your app through the ingress controller can be a different story. To help you navigate this problem, let’s dive into a clear solution so you can connect with ease.

Understanding the Problem

When deploying applications in Kubernetes, it's essential to configure your networking correctly. In the scenario we’re tackling:

The ingress controller has been created successfully.

You can ping the IP address but receive a "Connection refused" error when attempting to connect via telnet, preventing access to your application.

Key Observations

The output from kubectl get ing -n test reveals your ingress resource but indicates that the IP address displayed is not an externally accessible one.

The ingress controller is working, but the method of access may need reviewing.

Analyzing the Ingress Setup

To effectively access your application, it is crucial to ensure you’re using the correct IP address. Here are steps to help you resolve the access issue:

Step 1: Identify the Ingress Controller's Service IP

Check the Ingress Controller: Your NGINX Ingress Controller Deployment will have a service associated with it. Depending on its type, it may or may not be reachable externally.

Determine Service Type: In this case, your ingress controller is deployed via a NodePort service, which does not provide an external IP address. Instead, you must use the Node's IP address.

Step 2: Identify the Node IP

To obtain the IP address of the node where your ingress controller pod is running, you can execute the following commands:

[[See Video to Reveal this Text or Code Snippet]]

What This Common Code Does: These commands first find the node the ingress pod is running on and then retrieve the node's IP address.

Important Notes for Managed Clusters

If your Kubernetes cluster is on a managed service (like GKE, Azure, or AWS), you have the option to use a LoadBalancer service. This will provide an external IP that allows easier access to hit your ingress controller, enabling seamless connections to your applications.

Conclusion

Navigating Kubernetes networking can be tricky, especially when dealing with NGINX ingress controllers. Remember:

The IP from your ingress resource may not be what you should use to connect externally.

Always check that you’re accessing the right Node IP if utilizing NodePort services.

By following these steps and understanding your ingress configuration, you can successfully access your applications in a Kubernetes cluster without the hassle of connection issues. Happy deploying!