Here we will consider a web.py application that has two primary components: a web server and a database server. We will provision one host for each role, bootstrap them, and deploy the software onto our new hosts.
Our application stack will consist of the following:
web.pyas our web frameworkPostgreSQL for data storage
EC2 for virtual hosts
We want to define two primary roles that represent our web server and our database server. In addition, we will construct a baseline role for all our servers that will supply any common data we need such as user accounts, SSH keys, network configuration data, shells, common utilities, libraries, and so on.
We will need to find or write cookbooks for the following components we will use:
Python
supervisord
PostgreSQL
User accounts
Our custom web application