Development of new n-tier app

Overview

New app for teaching Advanced Ansible replacing earlier bad-ansible.

Overall architecture is:

          flask1
lb ->               postgres
          flask2

Concept change from bad-ansible

n-tier app is designed to be well written but monolithic in its construction to all useful exercises in refactoring, introducing modularity, and a backdrop to create roles and or collections from sound a sound ansible code base.

Outline of main flow

• common

  • setup yum repos (via satellite)

  • setup firewalld

• setup postgres

  • firewalld rule opening 5432

  • install postgres 10

  • no data load phase - come back to that?

• setup app tier

  • firewalld rule opening 443

Development Environment

While intended to be deployed on a real cloud or virtualization platform it comes with a Vagrantfile and associated playbooks

Deploying the Database Tier

Notes:

Does firewalld need to be configured?

Resources

• Jeff Geerling’s Ansible Galaxy Role

• Useful articles on Postgres

  • Setting it up from scratch

https://opensource.com/article/17/6/ansible-postgresql-operations

Credits

• Aditya Patawari and Vikas Aggarwal

  • I used their phone app during debugging

  • Shout out for their Ansible Automation Cookbook

• Jeff Geerlinguy for his Ansible Galaxy Postgres Role