How do I run a Sinatra app as a deamon from the command line?

Question

How do I run a Sinatra app as a deamon from the command line?

It is using Thin:

ruby app.rb -p 3000 -e production

I don't like to set it up in the app.rb itself. I want to deamonise it from the command line.

Answer 1

From Start Sinatra app in the background with stdout and stderr redirected (append) to a file:

nohup ruby app.rb -p 3000 -e production >> log/log_file 2>&1 &

Answer 2

I don't know if it's possible with Ruby. But it's an easy task with rackup.

Just add a config.ru:

require './app'
run Sinatra::Application

And with this in place you can start it as a daemon:

rackup -p 3000 -E production -D