domain-routing-demo's Introduction

Domain Routing with Flask and Nginx

Prerequisites

Install Docker: Make sure you have Docker installed on your machine. You can download it from the official Docker website.
Run the Docker containers:
```
docker-compose up
```
Access the application:
- Open your web browser and visit http://example.com and http://blog.example.com. Since this is a local setup, you'll need to update your local hosts file to map these domains to 127.0.0.1.
- Add the following lines to your /etc/hosts file (Linux/macOS) or C:\Windows\System32\drivers\etc\hosts file (Windows):
```
127.0.0.1 example.com
127.0.0.1 blog.example.com
```
- Now, try accessing http://example.com and http://blog.example.com again.

FAQs

What is use of :ro in file compose.yaml?

In the Docker Compose configuration, the :ro at the end of the volume mount (/etc/nginx/nginx.conf:ro) stands for "read-only." This means that the file or directory from the host machine is mounted into the container in read-only mode. In the case of the Nginx container, the nginx.conf file is mounted into the container at the path /etc/nginx/nginx.conf, and it is marked as read-only (:ro). This ensures that the Nginx container can read the configuration but cannot modify it. It's a good practice to use read-only mounts for configuration files to enhance security and prevent accidental modifications within the container.

What is use of proxy_set_header Host $host; in nginx.conf?

The proxy_set_header Host $host; directive in the nginx.conf file preserves the original Host header, ensuring accurate domain/subdomain information when forwarding requests to the Flask application.