Purpose

This docker project sets up a basic architecture based on:

one nginx reverse proxy frontend
three apache2 backends

Each backend is running on a different port and is displaying a basic html page with different background color.

The background color of the page is managed using an environment variable named color that is passed to the apache2 backends.

Thanks to the color variable, you can easily monitor on which backend the http request has been dispatched.

Demonstration

You can use this project to create a Christmas garland:

Usage

Start

docker-compose up -d

Test

curl localhost

returns:

<!DOCTYPE html>
<html lang="en">
<head>
    <style>
        body {
            background-color: red; <!-- color value from env var -->
            color:white;
        }
    </style>
    <meta charset="UTF-8">
    <title>red</title>
</head>
<body>
<h1>red</h1>
</body>
</html>

Stop