How to set up a Custom Redirect in Coolify

With the right Dockerfile, you can quickly and easily set up a custom HTTP redirect in Coolify.

Background

I recently migrated an old Fider instance from a manual Docker install to Coolify, and I wanted to update the domain as well - with a redirect from the old domain.

Instead of performing the redirect on another server, I decided I would keep things organized and set up the redirect on my Coolify server. Additionally, I wanted a solution that wouldn't get in the way of Coolify's default installation, and wouldn't complicate things in the future. After some trial and error I landed on a solution: Spin up a new Coolify "application" that runs a simple server whose sole job is to redirect a single url.

Instructions

1. Take note of the SOURCE URL (the old url that you're redrecting from) and the TARGET URL (the new url that you're redirecting to).
2. Make sure that the appropriate DNS records are pointing your SOURCE URL to the IP address of your Coolify server. Check that your DNS changes have propagated at https://dnschecker.org/
3. On the Coolify Dashboard click Create New Resource

4. Then click Application
5. On the Select a Source page, enter the following under Simple Dockerfile:

# Use an existing Caddy image as the base image
FROM caddy:2.3.0-alpine

# Expose port 80 for HTTP traffic
EXPOSE 80

# Create the Caddyfile with the desired configuration
RUN echo "{" > /etc/caddy/Caddyfile
RUN echo "  auto_https off" >> /etc/caddy/Caddyfile
RUN echo "}" >> /etc/caddy/Caddyfile
RUN echo ":80 {" >> /etc/caddy/Caddyfile
RUN echo "  redir https://targeturl.com{uri}" >> /etc/caddy/Caddyfile
RUN echo "}" >> /etc/caddy/Caddyfile

# Start the Caddy server
CMD ["caddy", "run", "--config", "/etc/caddy/Caddyfile"]

(Make sure that you change targeturl.com to your TARGET URL.)

4. Click Deploy Dockerfile
5. Set up the config of your new Application as follows, making sure that the URL is set as your SOURCE URL:

6. Click Save
7. Click Deploy in the upper right hand corner, and wait a minute or two for the deploy to complete.

8. Click Open in the upper righthand corner, and your browser should open to the TARGET URL.
9. Check if your redirect is working at https://httpstatus.io/

Hopefully this helps!