Ruby Passenger + Nginx – Error code explanation: HTTPStatus.NOT_FOUND – Nothing matches the given URI

Are you tired of encountering the frustrating HTTPStatus.NOT_FOUND error when using Ruby Passenger with Nginx? Do you feel like you’ve tried everything to fix the issue, but nothing seems to work? Fear not, dear developer! In this comprehensive guide, we’ll delve into the world of Ruby Passenger and Nginx, and provide you with a step-by-step solution to resolve the “Nothing matches the given URI” error.

What is Ruby Passenger?

Ruby Passenger, also known as Phusion Passenger, is a popular web application server designed to work with Ruby on Rails and other Ruby web frameworks. It’s known for its ease of use, high performance, and robust feature set. When used in conjunction with Nginx, Ruby Passenger provides a powerful and scalable solution for deploying Ruby-based web applications.

What is Nginx?

Nginx (pronounced “engine-x”) is a popular open-source web server software that’s widely used for serving web content, load balancing, and reverse proxying. It’s known for its high performance, scalability, and flexibility, making it an ideal choice for large-scale web applications.

The Error: HTTPStatus.NOT_FOUND – Nothing matches the given URI

The HTTPStatus.NOT_FOUND error, also known as a 404 error, occurs when the Nginx server cannot find a matching URI for the incoming request. This error can occur due to a variety of reasons, including:

• Incorrectly configured Nginx server blocks
• Invalid or missing routes in the Ruby Passenger application
• Misconfigured Passenger settings
• Issues with the Ruby application’s routing mechanism

Troubleshooting Steps

Before we dive into the solution, let’s go through some troubleshooting steps to ensure that we’ve covered all the bases:

1. Check the Nginx error logs for any clues about the error. You can do this by running the command sudo nginx -t and checking the error logs.

2. Verify that the Ruby Passenger application is running correctly by checking the Passenger logs. You can do this by running the command passenger-status.

3. Check the Ruby application’s routing mechanism to ensure that the routes are correctly defined. You can do this by running the command rake routes and checking the output.

4. Verify that the Nginx server blocks are correctly configured. Check the Nginx configuration files (usually located in /etc/nginx/sites-available/) to ensure that the server blocks are correctly defined.

Solution: Configuring Nginx and Ruby Passenger

Now that we’ve completed the troubleshooting steps, let’s move on to the solution. To resolve the HTTPStatus.NOT_FOUND error, we need to configure Nginx and Ruby Passenger correctly.

Configuring Nginx

First, let’s create a new Nginx server block configuration file. Create a new file in the /etc/nginx/sites-available/ directory and add the following code:

server {
  listen 80;
  server_name example.com;

  root /var/www/example.com/public;
  index index.html index.htm;

  passenger_enabled on;
  passenger_ruby /usr/bin/ruby;

  location / {
    try_files $uri $uri/index.html $uri.html @passenger;
  }

  error_page 404 /404.html;
  error_page 500 502 503 504 /50x.html;

  location = /50x.html {
    root /usr/share/nginx/html;
  }
}

This configuration file sets up a new server block for the domain example.com, with the document root set to /var/www/example.com/public. The passenger_enabled directive enables Passenger, and the passenger_ruby directive specifies the Ruby executable to use.

Configuring Ruby Passenger

Next, let’s configure Ruby Passenger. Create a new file in the /etc/passenger/ directory and add the following code:

  ServerName example.com
  DocumentRoot /var/www/example.com/public
  
    Options Indexes FollowSymLinks MultiViews
    AllowOverride None
    Require all granted
  

  PassengerEnabled on
  PassengerRuby /usr/bin/ruby

This configuration file sets up a new VirtualHost for the domain example.com, with the document root set to /var/www/example.com/public. The PassengerEnabled directive enables Passenger, and the PassengerRuby directive specifies the Ruby executable to use.

Restarting Nginx and Passenger

Now that we’ve configured Nginx and Ruby Passenger, let’s restart both services to apply the changes:

sudo service nginx restart
sudo service passenger restart

Testing the Solution

Finally, let’s test the solution by accessing the Ruby application using a web browser. If everything is configured correctly, you should see the Ruby application’s homepage. If you still encounter the HTTPStatus.NOT_FOUND error, double-check the configuration files and troubleshooting steps to ensure that everything is correct.

Conclusion

In this article, we’ve provided a comprehensive guide to resolving the HTTPStatus.NOT_FOUND error when using Ruby Passenger with Nginx. By following the troubleshooting steps and configuring Nginx and Ruby Passenger correctly, you should be able to resolve the “Nothing matches the given URI” error and get your Ruby application up and running smoothly.

Remember to always check the error logs and configuration files to ensure that everything is correct. With a little patience and persistence, you’ll be able to resolve the error and get back to developing your Ruby application.

Troubleshooting Step	Description
Check Nginx error logs	Check the Nginx error logs for any clues about the error.
Verify Ruby Passenger application	Verify that the Ruby Passenger application is running correctly.
Check Ruby application routing	Check the Ruby application’s routing mechanism to ensure that the routes are correctly defined.
Verify Nginx server blocks	Verify that the Nginx server blocks are correctly configured.

By following these troubleshooting steps and configuring Nginx and Ruby Passenger correctly, you’ll be able to resolve the HTTPStatus.NOT_FOUND error and get your Ruby application up and running smoothly.

Frequently Asked Question

Ruby Passenger + Nginx can be a powerful combination, but sometimes it throws errors that leave us scratching our heads. Here are some explanations for the HTTPStatus.NOT_FOUND error, and how to overcome it.