docker-rails-example VS dockerfile-rails

I took a 13,000 line Rails 7.0 app and updated it to 7.1. I had to change 1 line of test configuration code to make everything work.

I would say that's a success for having an easy upgrade path. Now the fun part is going back to refactor some of the code to use the new features in 7.1.

If anyone is curious, I updated my Rails / Docker example app to use 7.1 too https://github.com/nickjj/docker-rails-example. Even though Rails 7.1 comes with a Dockerfile, there's still a lot of opinions you can add such as using Docker Compose to have a fully working out of the box experience that works in development and production -- complete with Postgres, Redis, Action Cable, Sidekiq and more.

Even though Rails 7.1 comes with a Dockerfile, there's still a lot of opinions you can add such as using Docker Compose to have a fully working out of the box experience that works in development and production.

If anyone is interested in that, I updated my example Rails app https://github.com/nickjj/docker-rails-example to use Rails 7.1 a few hours after 7.1 dropped.

If you're itching for Docker compatibility I maintain https://github.com/nickjj/docker-rails-example.

- https://github.com/nickjj/docker-rails-example

There's https://github.com/nickjj/docker-rails-example if you're looking for an end to end 1 command solution that works in dev and prod. It pulls together Puma, Sidekiq, Action Cable, Postgres, Redis, esbuild and Tailwind. It's all set up and ready to use Hotwire as well.

If anyone is looking for a more complete guide I put together this a while back: https://nickjanetakis.com/blog/a-guide-for-running-rails-in-...

The post also includes a ~1h hour ad-free YouTube video. It includes running Rails and also Sidekiq, Postgres, Redis, Action Cable and ties in esbuild and Tailwind too. It's all managed by Docker Compose.

The example app is open source at https://github.com/nickjj/docker-rails-example and it's optimized for both development and production. No strings attached.

If you're interested I've created https://github.com/nickjj/docker-rails-example with a base project using Docker Compose, Postgres, Redis, Sidekiq, Tailwind and esbuild.

I create an Up controller https://github.com/nickjj/docker-rails-example/blob/main/app/controllers/up_controller.rb and then have Uptime Robot https://uptimerobot.com/ hit it every few minutes.

If you want to automatically generate Dockerfiles for more versions of Rails (not just the latest) that detect OS packages that need to be installed from gems present in your Gemfile, check out https://github.com/fly-apps/dockerfile-rails

You can install it in your rails app by running:

1. bundle add dockerfile-rails

2. rails g dockerfile

> I felt bad

Don't. I can honestly say that I didn't write this post targeting HN. I'll go further... this post wasn't meant for people who are unlikely to use https://github.com/fly-apps/dockerfile-rails#overview. I recently added some features to that gem whose usage may not be intuitively obvious. I wrote this post to explain some of the motivation for those features.

I don't know how to mark posts as not intended for HN (and truth be told, if there was such a feature, I'd be inclined to overuse it). I don't know where else I should have posted this content, but I'm not sure I would be inclined to move it. In any case, this post, as written, serves a purpose for me. Somebody not you and not me felt it belonged here. We can both second guess that decision. Either way, there is no reason for either of us to feel bad.

Did you try migrating with this guide? https://fly.io/docs/rails/getting-started/migrate-from-herok...

The issues you ran into with older versions of Rails was probably because the Dockerfile that `fly launch` generated was for new versions of Rails. We switched to https://github.com/rubys/dockerfile-rails to streamline Dockerfile generation and support older versions of Rails.

If you try it again and run into issues you can open an issue at https://github.com/rubys/dockerfile-rails/issues or post in https://community.fly.io and somebody will help get that sorted out.

The more versions of Rails we can deploy the better!

At the moment Rails is focused on simplicity/readability. I've got a gem that I'm proposing (and DHH is evaluating) that adds caching as an option: https://github.com/rubys/dockerfile-rails#overview

even though the article does not go deep into multistage builds Fly.io does provide cookbooks and even a link to a Rails generator there.