Lampros - Weird Bricks

"Hello World" with Sinatra and Puma using MRI and Jruby

11 February, 2017 | Sinatra

Hello internet,

A long time ago, I wrote about installing Jruby 1.7.3 on FreeBSD 9.1. Recently I was looking to build a small Sinatra application on CentOS 6.x.

Here's my notes on how I got it done.

MRI Ruby first:

1. Install MRI Ruby:

I used my own repository so I don't spend time rebuilding Ruby from source:

yum -y install
yum -y install ruby

Check that Ruby was installed correctly:

ruby -v
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]

2. Install some dependencies:

yum -y install gcc

3. Install the sinatra and puma gems:

gem install sinatra puma --no-ri --no-rdoc

4. Add a file called sinatra-puma.rb with content:

require 'sinatra'

get '/' do
"Hello World!"

5. Run Puma:

ruby sinatra-puma.rb -s Puma -p 80 -o

Do the same thing with Jruby!

1. (Optional) If you are on the same server, uninstall the MRI Ruby:

yum -y remove ruby\*

2. Install Jruby (this assumes that you have installed my repository)

yum -y install jruby

3. Install the sinatra and puma gems for Jruby:

jruby -S gem install sinatra puma --no-ri --no-rdoc

4. Run Puma:

jruby sinatra-puma.rb -s Puma -p 80 -o