Book Image

Security Automation with Ansible 2

By : Akash Mahajan, MADHU AKULA
Book Image

Security Automation with Ansible 2

By: Akash Mahajan, MADHU AKULA

Overview of this book

Security automation is one of the most interesting skills to have nowadays. Ansible allows you to write automation procedures once and use them across your entire infrastructure. This book will teach you the best way to use Ansible for seemingly complex tasks by using the various building blocks available and creating solutions that are easy to teach others, store for later, perform version control on, and repeat. We’ll start by covering various popular modules and writing simple playbooks to showcase those modules. You’ll see how this can be applied over a variety of platforms and operating systems, whether they are Windows/Linux bare metal servers or containers on a cloud platform. Once the bare bones automation is in place, you’ll learn how to leverage tools such as Ansible Tower or even Jenkins to create scheduled repeatable processes around security patching, security hardening, compliance reports, monitoring of systems, and so on. Moving on, you’ll delve into useful security automation techniques and approaches, and learn how to extend Ansible for enhanced security. While on the way, we will tackle topics like how to manage secrets, how to manage all the playbooks that we will create and how to enable collaboration using Ansible Galaxy. In the final stretch, we’ll tackle how to extend the modules of Ansible for our use, and do all the previous tasks in a programmatic manner to get even more powerful automation frameworks and rigs.
Table of Contents (18 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Free Chapter
1
Introduction to Ansible Playbooks and Roles
5
Automating Web Application Security Testing Using OWASP ZAP

Automated patching approaches using Ansible


Patching and updating is a task that everyone who has to manage production systems has to deal with. There are two approaches that we will look are as follows:

  • Rolling updates
  • BlueGreen deployments

Rolling updates

Imagine that we have five web servers behind a load balancer. What we would like to do is a zero downtime upgrade of our web application. Using certain keywords available in Ansible, we can make this happen. 

In our example, we want to achieve the following: 

  • Tell the load balancer that web server node is down
  • Bring down the web server on that node
  • Copy the updated application files to that node
  • Bring up the web server on that node

The first keyword for us to look at is serial. Let's see this example from Ansible documentation:

- name: test play
  hosts: webservers
  serial: 1

The example is from http://docs.ansible.com/ansible/latest/playbooks_delegation.html#rolling-update-batch-size.

This ensures that the execution of the playbook is done serially...