Deploy Sinatra app on Heroku

Question

I have simple Sinatra app.

web.rb:

require 'sinatra'

get '/' do 
    "Hello" 
end

Gemfile:*

source :rubygems

gem 'sinatra', '1.1.0'
gem 'thin', '1.2.7'

config.ru:

require './web'
run Sinatra::Application

But when I deploy my app on Heroku I'll get the error on logs:

2012-03-27T19:17:48+00:00 heroku[router]: Error H14 (No web processes running) -> GET furious-waterfall-6586.herokuapp.com/ dyno= queue= wait= service= status=503 bytes=

How can I fix it?

Nothing. Only this error. 'heroku ps' shows that there is not running processes. 'heroku restart' didn't help me — ceth, Mar 27 '12 at 20:36
I don't know. I'm just got sinatra-bootstrap as template for my project and it works. — ceth, Mar 29 '12 at 05:20

Patrick Oscity · Answer 1 · 2013-08-11T13:21:43.540

25

Here's how to create a minimal sinatra app that deploys to heroku:

app.rb:

require 'sinatra'

get '/' do
  "hello world"
end

Gemfile:

source 'https://rubygems.org'

gem 'heroku'
gem 'sinatra'
gem 'thin'

config.ru:

require './app'
run Sinatra::Application

Type these commands in your command line to deploy (without the $ signs):

$ bundle install
$ git init
$ git add -f app.rb Gemfile Gemfile.lock config.ru
$ git commit -am "initial commit"
$ heroku create <my-app-name>
$ git push heroku master

Then test your app:

$ curl <my-app-name>.heroku.com

and you should see:

hello world

edited Aug 11 '13 at 13:21

answered Mar 27 '12 at 21:22

Patrick Oscity

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I got this error when trying the above "The source :rubygems is deprecated because HTTP requests are insecure. Please change your source to 'https://rubygems.org' if possible, or 'http://rubygems.org' if not." – JGallardo Aug 10 '13 at 01:02
@JGallardo, thanks for your comment! Bundler wants you to use HTTPS instead of HTTP, so you just have to change the line `source :rubygems` to `source 'https://rubygems.org'`. I changed that in my answer as well. Cheers – Patrick Oscity Aug 11 '13 at 13:21
The `heroku` gem is now deprecated (replaced by the Heroku Toolbelt). More info here: https://devcenter.heroku.com/articles/getting-started-with-ruby – ben.snape Jul 23 '14 at 14:29

score 16 · Accepted Answer · edited Apr 08 '18 at 21:58

16

You need a Procfile file alongside your config.ru to tell Heroku how to run your app. Here is the content of an example Procfile:

web: bundle exec ruby web.rb -p $PORT

Heroku Ruby docs on Procfiles

EDIT: Here's a sample config.ru from one of my sinatra/Heroku apps:

$:.unshift File.expand_path("../", __FILE__)
require 'rubygems'
require 'sinatra'
require './web'
run Sinatra::Application

You may need to require sinatra and rubygems for it to work.

edited Apr 08 '18 at 21:58

Boguslaw

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answered Mar 27 '12 at 20:00

Eric Wendelin

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@demas I've added a sample config.ru file in case that helps. Your Gemfile looks solid (though that is a kinda old version of sinatra, not sure if that plays in at all) – Eric Wendelin Mar 27 '12 at 20:32
Can you pls create minimal Sinatra-app on Github? I have tried your changes, but it doesn't help me – ceth Mar 27 '12 at 20:35
Sure, I'll spin one up in a few hours if you don't get it figured by then. Sorry, my sinatra apps thus far have been closed source :(( – Eric Wendelin Mar 27 '12 at 20:47
1

You might find this sinatra-bootstrap project useful in the meantime: https://github.com/adambair/sinatra-bootstrap – Eric Wendelin Mar 27 '12 at 20:49
1

as far as i know a Procfile should not be needed. – Patrick Oscity Mar 27 '12 at 21:23
You do not need the Procfile, unless you wish to run a webserver other than Webrick. Check out `heroku ps` and you can see what command was executed by Heroku to run your app! – danielricecodes Jun 26 '14 at 17:07

score 10 · Answer 3 · edited Nov 30 '17 at 09:10

10

I have had this problem a number of times in the past, and it was all because I didn't include my config.ru file with the requiring of [app].rb & then pushing to Heroku. Even if I added it afterwards and restarted, Heroku would never pick it up.

Destroy your small app on Heroku's site (http://www.heroku.com)
Then remove the remote from your project folder
```
$ git remote rm heroku
```
Then recreate the app

edited Nov 30 '17 at 09:10

Alex M

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answered Jul 16 '12 at 12:51

rpearce

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2

I just had the same problem reported by the OP, this is the only thing that fixed the problem. Thanks! – Matt Aimonetti Jul 20 '12 at 08:36
Same thing here. It seems that once you pushed an app with a missing or incorrect config.ru, the only fix is to recreate it. – Andre Bernardes May 01 '14 at 12:54
Thanks so much for your help. This is the only thing that worked. – rails4sandeep May 26 '17 at 08:13

score 1 · Answer 4 · answered Apr 25 '15 at 06:55

As an update, here is a slightly more minimal app that I created, and confirmed to be working as of today. The thin gem was not needed, and a Procfile was not needed to get an initial working app.

Gemfile

source 'https://rubygems.org'
gem 'sinatra'

config.ru

require './app'

run Sinatra::Application

Note: The require line uses './app' instead of 'app'.

app.rb

require 'sinatra'

get '/' do
  'Hello, World! Find me in app.rb'
end

If you want to use this template, you can copy it, bundle, and push the Git repo.

$ git init
$ git add .
$ git commit -m "initial sinatra app"
$ bundle
$ git add Gemfile.lock
$ git commit -m "bundle install"
$ heroku create
$ git push heroku master
$ heroku open

score 0 · Answer 5 · answered Sep 26 '12 at 21:44

0

By adding the gem 'heroku' to the Gemfile, I got it working. No Procfile needed.

answered Sep 26 '12 at 21:44

coderberry

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Deploy Sinatra app on Heroku

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