Docker Compose Notes #2

How to set up multiple websites on docker-compose

To set up multiple websites on Docker Compose, you’ll need to create a docker-compose.yml file for each website. A docker-compose.yml file defines the services that make up your website, such as a web server and a database, and how they are connected.

Here’s an example docker-compose.yml file that defines a simple web service:

version: "3"
services:
web:
build: .
ports:
- "8000:8000"

This file defines a single service called web that is built from the current directory (.) and exposes port 8000 on the host machine.

To set up multiple websites, you’ll need to create a docker-compose.yml file for each website. Each file should define the services for the website, including any dependencies and connections between the services.

Once you have your docker-compose.yml files, you can use the docker-compose command to build and run your websites. For example, to build and run the web service defined above, you would run:

$ docker-compose build 

$ docker-compose up

This will build the web service and run it in a Docker container. You can then access the website at http://localhost:8000.

You can repeat these steps for each website you want to set up with Docker Compose. This will allow you to run multiple websites on the same machine using Docker.

How to set up multiple websites on docker-compose using the same ports

To set up multiple websites on Docker Compose using the same ports, you’ll need to use a reverse proxy to route incoming requests to the correct website. A reverse proxy is a server that receives incoming requests and forwards them to the appropriate service based on the hostname or other information in the request.

To set up a reverse proxy for your websites, you’ll need to do the following:

1. Create a docker-compose.yml file for each website, as described in the previous answer. Make sure that each website’s services are listening on different ports.
2. Create a new service in your docker-compose.yml file for the reverse proxy. This service should run a reverse proxy server, such as nginx or Apache, and be connected to all other services in your docker-compose.yml file.
3. Configure the reverse proxy to route incoming requests to the correct service based on the hostname or other information in the request. For example, if you have two websites, example.com and example.org, you would configure the reverse proxy to forward requests for example.com to the service for that website and requests for example.org to the service for that website.
4. Use the docker-compose command to build and run your services, including the reverse proxy.

With this setup, incoming requests to your websites will be routed by the reverse proxy to the correct service, allowing you to use the same ports for multiple websites.