Heroku rails Procfile

Question

I am very new to Heroku.

I uploaded my Rails app to Heroku and would like to run it with Thin instead of Webrick. Following Heroku’s guide I am supposed to use web: bundle exec rails server thin -p $PORT -e $RACK_ENV to create the procfile. However I always get the response web:: command not found.

What am I missing?

Answer 1

You’re not supposed to run web: bundle exec rails server thin -p $PORT -e $RACK_ENV as a command, rather you create a new file called Procfile with that as its contents.

Either create the file and paste it in using your editor, or just do:

echo "web: bundle exec rails server thin -p \$PORT -e \$RACK_ENV" > Procfile 

Answer 2

Have you bundled thin into your application?

gem 'thin' 

If not, you're looking at Rails trying to use the default server. Personally, I would look at using Unicorn on Heroku, but be careful with how many workers you might need.

http://neilmiddleton.com/the-procfile-is-your-friend. Cached version: https://web.archive.org/web/20130926005616/http://www.neilmiddleton.com/the-procfile-is-your-friend

http://neilmiddleton.com/getting-more-from-your-heroku-dynos