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AWS elastic beanstalk nginx proxy

Basically, Elastic Beanstalk uses nginx as the reverse proxy to map your application to your Elastic Load Balancing load balancer on port 80.

Elastic Beanstalk provides a default nginx configuration that you can either extend or override completely with your own configuration.

By default, Elastic Beanstalk configures the nginx proxy to forward requests to your application on port 5000.

You can override the default port by setting the PORT environment property to the port on which your main application listens.

All Amazon Linux 2 platform versions use nginx as their default reverse proxy server.

The Tomcat, Node.js, PHP, and Python platform also support Apache HTTPD as an alternative.

To select Apache on these platforms, set the ProxyServer option in the aws:elasticbeanstalk:environment:proxy namespace to apache.

All platforms enable proxy server configuration in a uniform way, as described in this section.

Elastic Beanstalk configures the proxy server on your environment’s instances to forward web traffic to the main web application on the root URL of the environment; for example, http://my-env.elasticbeanstalk.com.

By default, Elastic Beanstalk configures the proxy to forward requests coming in on port 80 to your main web application on port 5000. You can configure this port number by setting the PORT environment property using the aws:elasticbeanstalk:application:environment namespace in a configuration file

Your application should listen on the port that is configured for it in the proxy. If you change the default port using the PORT environment property, your code can access it by reading the value of the PORT environment variable.

If you configure your proxy to send traffic to multiple application processes, you can configure several environment properties, and use their values in both proxy configuration and your application code.

Another option is to pass the port value to the process as a command argument in the Procfile.

How to configure nginx?

Elastic Beanstalk uses nginx as the default reverse proxy to map your application to your Elastic Load Balancing load balancer.

Elastic Beanstalk provides a default nginx configuration that you can extend or override completely with your own configuration.

Kindly note when you add or edit an nginx .conf configuration file, be sure to encode it as UTF-8.

To extend the Elastic Beanstalk default nginx configuration, add .conf configuration files to a folder named .platform/nginx/conf.d/ in your application source bundle. The Elastic Beanstalk nginx configuration includes .conf files in this folder automatically.

~/workspace/my-app/
|-- .platform
|   `-- nginx
|       `-- conf.d
|           `-- myconf.conf
`-- other source files

To override the Elastic Beanstalk default nginx configuration completely, include a configuration in your source bundle at .platform/nginx/nginx.conf:

~/workspace/my-app/
|-- .platform
|   `-- nginx
|       `-- nginx.conf
`-- other source files

If you override the Elastic Beanstalk nginx configuration, add the following line to your nginx.conf to pull in the Elastic Beanstalk configurations for Enhanced health reporting and monitoring, automatic application mappings, and static files.

 include conf.d/elasticbeanstalk/*.conf;

Conclusion

In conclusion, our Support Engineers showed us how to configure AWS elastic beanstalk nginx proxy. Drop us a line in the comments if you face any trouble.