Railgun by Cloudflare

With Cloudflare's Railgun you can decrease your Heroku app’s load time across the world by 2-3 times.


Railgun is only available on Business plan.

We assume your Heroku app is already configured to use CloudFlare DNS and CDN features.

You'll need a Railgun Activation Key. Copy it from your CloudFlare Account Settings and assign to RAILGUN_ACTIVATION_KEY Heroku config variable

My Subscriptions page

heroku config:set RAILGUN_ACTIVATION_KEY=xxxxxxxxx

Running the stack

heroku addons:create dockhero
heroku plugins:install dockhero

heroku dh:generate railgun    # this generates dockhero-compose.yml
heroku dh:compose up -d

Now turn on Railgun for your entire Cloudflare domain. Click “Test” button to make sure everything works.

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That's it. Try sending requests to your app via CloudFlare domain name. Cf-Railgun HTTP header should appear on all of the responses from your app.

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