Docker compose

Purpose: compose is a tool designed to create multi-containers app.

Install

sudo apt install python-pip
pip install docker-compose

docker-compose.yml

The magic happens in a file named docker-compose.yml

Run

docker-compose up -d

Stop

docker-compose down -v

Networking

docker-compose handles the creation a private network:

Creating network "n-tiers_default" with the default driver
Creating object-cache ... done
Creating pgsql        ... done
Creating web          ... done

Example

Better than words, take a look at this repo that illustrates a classical n-tiers web app