Скачать или смотреть Understanding Kubernetes Nginx Ingress Controller with Multiple Ingress Resource Objects

Learn how to efficiently manage multiple `ingress` resource objects in Kubernetes while ensuring Auth and TLS capabilities are handled correctly.
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Understanding Kubernetes Nginx Ingress Controller with Multiple Ingress Resource Objects

In the world of container orchestration, Kubernetes continues to be a leader, especially when it comes to managing incoming requests to applications. When deploying applications, you often need to handle routes, manage authentication, and implement TLS (Transport Layer Security) for secure communication. Some users wonder if it’s feasible to maintain separate ingress resource files for different functionalities while employing a single nginx ingress controller. In this guide, we'll explore this question in detail.

The Problem

Imagine you have multiple requirements for your Kubernetes deployment:

External Authentication: Using an auth-url for securing routes.

TLS Termination: Ensuring incoming traffic is secure.

Routing for Multiple Backends: Using different backends for different applications.

You have a vision of separating these concerns into individual ingress resource YAML files, such as:

Ingress1.yaml for SSL termination

Ingress2.yaml for JWT authentication

Ingress3.yaml for the application routing itself

The question arises: Can you achieve this separation while having them function correctly? Or will you need to combine all functionalities into a single ingress resource file?

The Solution

TL;DR

The simple answer is that you will need to keep these multiple functionalities together in a single ingress resource.

Explanation

Let's break down why combining into a single ingress resource is necessary:

Ingress Concept:

At its core, an ingress defines a route to your deployed application. Think of it as a gateway through which all traffic must pass.

Properties Explained:

Ingress1.yaml: This file only defines a route for SSL termination without any backend defined.

Ingress2.yaml: This file focuses on JWT authentication also without a specified backend route.

Ingress3.yaml: Here is where your application is defined, but it lacks the necessary properties to handle TLS and JWT.

Why Combine?

Functionality Overlap: While it might seem cleaner to separate concerns, authentication and security features (like TLS) are properties of a route. They cannot exist independently without a defined traffic path to an application.

Unified Configuration: By combining all functionalities into one ingress resource, you ensure that TLS and JWT authentication apply directly to the routes serving your application.

Example Combined Ingress Resource

Below is an example of how you could combine these features into a single ingress resource:

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

Conclusion

In Kubernetes, separating configurations for ingress resource objects may sound appealing, but ultimately they are meant to work in conjunction. Combining your ingress resources into a single cohesive configuration allows you to effectively manage authentication and TLS handling, ensuring your application is secure and reachable.

If you're deploying with an nginx ingress controller, keep in mind that you will need to utilize a unified approach to ingress definitions. By doing so, you can leverage the power of Kubernetes to maintain a robust and secure application environment.

Now that you understand how to set up and manage ingress resources effectively, you can confidently configure your Kubernetes deployments to handle security and routing seamlessly!