| Stable release | 3.0.8 |
|---|---|
| Website | modrails.com |
Phusion Passenger (informally also known as mod_rails and mod_rack) is a module for the Apache HTTP Server and nginx for deployment of Ruby applications, including those built using the Ruby on Rails framework. It is available as a Gem package and is supported on Unix-like operating systems. Phusion Passenger also supports arbitrary Ruby web applications that follow the Rack interface.
At this time, Phusion Passenger is the preferred way to deploy Ruby on Rails applications,[1] having been recommended by the Ruby on Rails authors.[2][3] The Rails Hosting 2009 Survey concluded that Phusion Passenger is the most popular way to deploy Rails applications.[4] The Chief Evangelist of Planet Argon, the company who conducted the survey, speaks favorably of Phusion Passenger and highly recommends it in production environments.[5] The survey's conclusion is also supported by data from sites such as The Ruby Toolbox.[6]
In combination with Ruby Enterprise Edition, Phusion Passenger claims that it is capable of reducing Rails's memory consumption by 33% as well as increasing its performance.[7] This claim has been verified by Shopify.[8]
Version 2.0 of Passenger added WSGI support, allowing it to also serve Python applications.[9]
A standalone version of Passenger exists, that can be used to run multiple Ruby versions in the same webserver.[10]
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