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Udemy Ansible Assignment

This is a solution for the Ansible Assignment on Udemy https://www.udemy.com/learn-ansible-advanced

This assignment tests the students knowledge on deploying a distributed web application on cloud using fully automated Ansible playbooks. The solution is shared to the instructor and student community using github repository and feedback will be given.

A full video demonstration of the solution is under development. Will update once ready.

Solution

Below is my solution to the problem.

Infrastructure

I chose Google Cloud Platform as I found it easiest to get started. I created a temporary account to get a $300 credit and utilized it as development environment.

Development Environment

I set up a local VM on Oracle Virtual Box as my Ansible Controller. There are some pre-requisites required on the Ansible Controller system to work with Google Cloud. Details are documented here Once the Ansible Controller was setup I proceeded to develop my project.

Ansible Project

I decided to use tasks file for deploying VMs and create my own roles to configure those VMs with Application. ​

  • Tasks: A role to deploy necessary compute instances on on Google Cloud
  • Roles: ansible-role-mysql: A role to install and configure MySQL on any given systems
  • Roles: ansible-role-flask-web: A role to install and configure Flask application on multiple
  • Tasks: Configure native Google Load Balancing and firewalls
  • Tasks: Send email notification

Group Variables to have following properties:

  • project_id: ID of my GCP project

  • service_account_email: ​ Service Account to connect to GCP

  • credentials_file: ​​ Credentials file to connect to GCP

  • num_web_instances: ​ Number of web instances to deploy

  • db_name: Database name

  • db_user: Database user to create

  • db_password: Password for the Database user

  • machine_type: Type of machine to deploy eg: n1-standard-1
    ​- image: Image of instance to deploy debian-7

  • instance_list: An array containing list of servers to deploy

       - web-server-1,web-server-2
   - db-server

  • db_name: Database name

  • db_user: Database user

  • db_user_password: Database user password

  • ansible_user: User to connect to Compute Instances using gcloud compute ssh

  • ansible_ssh_private_key_file: Private key file to connect to Compute Instances using gcloud compute ssh