Solving the Traefik Prefix Issue: A Guide to Correct Middleware Configuration

Struggling with `Traefik` not adding the `/admin` prefix for your `PiHole` instance? Discover the simple fix and enhance your Docker setup with our step-by-step guide!
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Solving the Traefik Prefix Issue: A Guide to Correct Middleware Configuration

If you’re venturing into the world of homelabs and using Docker, you might run into some challenges. One such issue is getting Traefik to add a desired prefix to your service’s URL. For many users, including those running the popular ad-blocker PiHole, this can feel like a small hurdle that has a big impact. In this post, we’ll walk through how to resolve the problem of Traefik not adding the /admin prefix as you intended for your PiHole service.

Understanding the Problem

In your setup, you successfully launched the PiHole dashboard and can access it through pihole.local.myurl.com/admin. However, the goal is to have the URL automatically append the /admin prefix for easier access. You might have thought this through Docker Compose configuration using Traefik labels, but are facing issues with it not working as expected.

The Solution

The good news is this problem is often resolved by properly specifying the location of the middleware in your docker-compose.yml file. In particular, you'll need to append @docker to the middleware lines that are being applied to the routers. Let’s break down how to make this happen:

Step-by-Step Configuration

Open Your Docker Compose File: Begin by editing your existing docker-compose.yml for your PiHole setup.

Identify Middleware Application: In your existing labels, you have defined middlewares for your pihole router. Specifically, look at the following lines:

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

Modify Middleware Lines: To ensure the middleware is recognized correctly, append @docker to each line as follows:

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

Complete Configuration: If you have other middlewares running as well, ensure to add the @docker suffix where applicable. Here’s a sample of how your updated section might look:

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

Example Configuration

Here’s a simple configuration showcasing how to correctly apply these changes:

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

Conclusion

By appending @docker to your middleware configurations in Traefik, you can easily resolve the prefix issue and ensure your PiHole URL routing works seamlessly. This small adjustment can make a significant difference in the usability of your Docker services. With these steps, you're one step closer to a smoother homelab experience!

If you encounter any more issues or have further questions about Traefik, Docker, or setting up your homelab, feel free to reach out!

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