Simple Form

Architecture

Introduction

This simple application should display a form that accepts three fields as input: "Name", "Favorite Color", "Cats or Dog". This form will save the result in a relational database and ensure that "Name" is unique. To achieve this I used Python Flask and MySQL, as well as ansible deploying the entire stack. (infrastructure and application on aws)

Dependencies:

- local python-pip, awscli and ansible installation
- inform default vpc (inform vpc_id, subnet_id and az)
- access_key & secret_key (admin)
- inform aws region
- an existing .pem key
- move .pem key to ~/.ssh (ansible default)
- chmod 400 .pem key
- create ~/.boto file
- configure aws credentials
- ansible version 2.8.4 deployed

Example files

# Example ~/.boto file
[Credentials]
aws_access_key_id = foo
aws_secret_access_key = bar

Example ~/.aws/credentials file
[default]
aws_access_key_id = foo
aws_secret_access_key = bar

Ansible Installation

Installation Guide

First Steps

In order to run the playbook you need to replace some information

.hosts: change ansible_ssh_private_key_file to your ~/.ssh/.pem file
get_rds_endpoint.sh: change the variable PEM to your ~/.ssh/.pem file
get_rds_endpoint.sh: change the variable REGION at your choice
infra.yml: in the vars section, update your region, azones_1a, azones_1c, subnets, keypair variables

Deploy Infrastructure

1. run the command 'ansible-playbook infra.yml -vvvv'
   PS: it is possible to have a failing in the security_group_RDS creation, run again the step 1. (probably it is a bug depending on the ansible version)
2. add the two instances public ip in .hosts files under #xxx.xxx.xx.xxx (the terminal will display both of them)
3. some tasks may take several minutes do deploy

Deploy Application

1.  run the commmand 'ansible-playbook deploy.yml'

Get RDS endpoint and replace into webservers

1. run the command './get_rds_endpoint.sh'
   PS: make sure you have the access_key & secret_key configured on ~/.aws/credentials.