1fb7b057-4030-4839-a1f8-68638ed52a4e

This is my Dockerfile: https://gist.github.com/budivoogt/d750e8c2b6ef24748446899b094f3cdb

What could continue to cause this error? Could it be the Railway injected variable is not available during the Docker build step, and only injected upon runtime once deployed?

I'm running Redis in the same environment with the Railway template. The REDIS_URL is a reference variable in the main app service.

Interestingly, the deployment does succeed and the private networking to the IPv6 URL resolves fine during runtime.

The private network is not available during build

I see - so what's the recommended solution here? Using a hardcoded PUBLIC_URL, since there's no way to inject it?

is it possible for your application to simply not use redis during build?

I'm using a dependency injection container which also has my database and other clients. So it's initialised there during the build phase. Perhaps I could lazy load it. Do you have any other ideas?

Use the public URL during build (don't hardcode it though) and then use the private URL during runtime

I see. Will the public url provided by Railway be available during the Dockerfile build stage though? Or is the var only injected during runtime?

And hi Brody! Good to see your name again. I hope you're well 🙂

Are you doing a build with a Dockerfile?

Yep! See the gist above.

Then all service variables are going to be available during build as long as you ref them with ARG and then all service variables will be available during runtime automatically.

Okay excellent so I can simply reference the public url during build and it'll be injected.

Cool I will give that a try.

Sounds good!