How to launch rails app with react in SSR mode,. customizing fly.rake or fly.toml

How To
1

Hello, community

I have a rails application setup with react in SSR mode, and below is the Procfile which is used with foreman,

backend: bin/rails s -p 8000
frontend: bin/vite ssr # runs on port 13714

Here the rails server will run on port 8000 and a node.js app runs on port 13714.

I am a bit confused to configure these startup commands with fly, like whether I have to use fly.rake file or fly.toml file.

Could someone help me with customizing the startup commands?
Thanks in advance.

2

Assuming that you are following the recommendation to Don’t Bundle Foreman; add ruby-foreman to the DEPLOY_PACKAGES in your Dockerfile, then change your lib/tasks/fly.toml as follows:

  task :server => %i(swapfile) do
    Bundler.with_original_env do
      sh "foreman start --procfile=Procfile.fly"
    end
  end

Feel free to adjust the path to the procfile and add additional setup tasks as dependencies.

3

Thank you @rubys ,

It is helpful. Yes I m not bundling foreman into my Gemfile dependencies.

I wanted to get rid of foreman, so can I do the following in server task definition of fly.rake ?

  task :server => :swapfile do
    sh 'bin/rails server'
    sh 'bin/vite my-node-server-script'
  end
4

Since bin/rails server normally won’t ever return, you won’t launch your node server.

There are a number of ways to launch multiple processes which are expected to run simultaneously. Foreman (and similar tools like overwind) are one way. See Running Multiple Processes Inside A Fly.io App for more options. Multi process machines are another.

Finally, since the Rakefile is ruby code, the following will also work:

fork { sh 'bin/rails server' }
fork { sh 'bin/vite my-node-server-script' }
Process.wait
1 Like
5

Much clear now, Thanks a lot @rubys will give it a short :pray:

6

Thank you @rubys it worked :heart_eyes: