Alpine Apache Docker Image with Custom Entrypoint

This Docker image provides an Apache server with an optional PHP-FPM backend. It allows for dynamic enabling of Apache modules and adjusts server settings based on environment variables.

Docker Hub

You can find our builds here:

https://hub.docker.com/r/mxmd/httpd/tags

ie:

docker pull mxmd/httpd:2.4

Building the Docker Image Locally

First, make sure you've cloned the repository and you are inside the directory containing the Dockerfile:

docker build -t mxmd/httpd:2.4.59 .

Running the Docker Image

You can run the image using:

docker run -d -p 80:80 -p 443:443 mxmd/httpd:2.4.59

Custom Entrypoint Features

1. Default Enabled Apache Modules

The following Apache modules come enabled by default:

• core_module (static): Fundamental module for the operation of the Apache server.
• so_module (static): Enables the loading of dynamic modules.
• http_module (static): Core module for processing HTTP requests.
• mpm_event_module (shared): Multi-Processing Module designed for high performance sites.
• authn_file_module (shared): Provides file-based authentication.
• authn_core_module (shared): Core authentication module.
• authz_host_module (shared): Provides host-based authorization.
• authz_groupfile_module (shared): Group file-based authorization.
• authz_user_module (shared): User-based authorization.
• authz_core_module (shared): Core authorization framework.
• access_compat_module (shared): Provides access control compatibility.
• auth_basic_module (shared): Basic authentication.
• reqtimeout_module (shared): Sets timeout for reading request headers and body.
• filter_module (shared): Content filter framework.
• deflate_module (shared): Handles compression of content before it is delivered to the client.
• mime_module (shared): Maps file extensions to MIME types.
• log_config_module (shared): Provides flexible logging capabilities.
• env_module (shared): Provides environment variable manipulation.
• expires_module (shared): Enables control over the setting of Expires and Cache-Control HTTP headers.
• headers_module (shared): Provides directives to manipulate HTTP response headers.
• setenvif_module (shared): Allows conditional setting of environment variables.
• version_module (shared): Determines the configuration layout version.
• proxy_module (shared): Provides basic proxy capabilities.
• proxy_fcgi_module (shared): Enables support for FastCGI proxy.
• unixd_module (shared): UNIX daemon-related functionality.
• status_module (shared): Provides server status information.
• autoindex_module (shared): Generates directory listings.
• dir_module (shared): Handles directory index files.
• alias_module (shared): Provides mapping of URLs to file system locations.
• rewrite_module (shared): Provides URL manipulation capabilities.

2. Dynamic Apache Modules Loading

You can enable additional Apache modules at runtime by passing the APACHE_MODULES environment variable. This variable should contain comma-separated values of the module's name and its path. You can get these paths by running docker run --rm httpd:2.4-alpine cat /usr/local/apache2/conf/extra/httpd-default.conf.

For example, to enable the ratelimit_module and allowmethods_module:

docker run -d -p 80:80 -p 443:443 -e APACHE_MODULES="ratelimit_module modules/mod_ratelimit.so,allowmethods_module modules/mod_allowmethods.so" mxmd/httpd:2.4.59

This setup ensures flexibility in managing your Apache modules based on different requirements.

3. Environment-Specific Server Settings

The Docker image allows you to toggle between production and development settings by using the HOST_ENV environment variable:

• Production Mode: Hide server details.

  docker run -d -p 80:80 -p 443:443 -e HOST_ENV=production mxmd/httpd:2.4.59

• Development Mode: Display full server details.

  docker run -d -p 80:80 -p 443:443 -e HOST_ENV=development mxmd/httpd:2.4.59

Checking Enabled Apache Modules

Upon starting the Docker container, the enabled Apache modules are printed to the console. To view them, you can check the container logs:

docker logs [container_id]

Replace [container_id] with your running container's ID.