Nginx is a high-performance web server and reverse proxy server used to handle the load of modern web applications. It is known for its stability, rich feature set, simple configuration, and low resource consumption. Nginx is widely used for serving static content, load balancing, and as a reverse proxy for HTTP and HTTPS servers.
When an Nginx module is not loaded, you may encounter errors such as 'unknown directive' or 'module not found' in your Nginx error logs. This typically happens when a configuration directive requires a specific module that is not currently loaded or installed.
nginx: [emerg] unknown directive "module_name"nginx: [emerg] module "module_name" is not installedNginx modules extend the functionality of the server, but they must be explicitly included in the configuration. If a module is not compiled with Nginx or not specified in the configuration file, it will not be loaded, leading to errors when directives from that module are used.
To resolve the issue of a module not being loaded, follow these steps:
First, verify if the module is compiled with your Nginx installation. You can do this by running:
nginx -V
This command will list all the modules compiled with Nginx. Look for your required module in the output.
If the module is not compiled, you may need to install it. For example, to install the ngx_http_image_filter_module, you can use:
sudo apt-get install nginx-module-image-filter
After installation, ensure the module is included in the Nginx configuration file.
Edit your Nginx configuration file (usually located at /etc/nginx/nginx.conf) to include the module:
load_module modules/ngx_http_image_filter_module.so;
Ensure that the path to the module is correct.
After making changes, test the Nginx configuration for syntax errors:
sudo nginx -t
If the test is successful, reload Nginx to apply the changes:
sudo systemctl reload nginx
For more information on Nginx modules, you can visit the official Nginx documentation. If you are interested in compiling Nginx from source with additional modules, refer to the Nginx installation guide.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)
