Deploying Docker Registry Proxy on Cloudflare Worker

Follow these steps to set up your Docker Registry proxy using Cloudflare Workers. This guide assumes you already have a Docker and Cloudflare account.

Step 1: Deploy the Worker

1. Copy the Script:
   • Open the index.js file from this repository.
   • Copy all the content.
2. Paste into Cloudflare Worker:
   • Log into your Cloudflare account.
   • Go to the Workers section and open or create a new worker.
   • Paste the copied content into the script editor in the Cloudflare Worker's dashboard.
   • Save your changes.

Step 2: Bind a Custom Domain

1. Add Route:
   • Still in the Workers section, select your worker.
   • Go to the "Triggers" tab and add a route using your custom domain (e.g., https://your-domain.com/*).
   • Ensure that your DNS settings for the domain are correctly configured in Cloudflare.

Step 3: Configure Docker to Use the Proxy

1. Modify Docker Settings:
   • Open or create the /etc/docker/daemon.json file on your Docker host.
   • Add or modify the registry-mirrors entry to include your custom domain:

     {
       "registry-mirrors": ["https://your-domain.com"]
     }

   • Save the changes.
2. Restart Docker Service:
   • Restart the Docker service to apply the changes. Depending on your system, this can typically be done with a command like sudo systemctl restart docker.

Done! Your Docker installations will now use your Cloudflare Worker as a proxy for Docker Registry requests, which can improve pull performance and provide additional security benefits.