Book Image

Network Automation Cookbook

By : Karim Okasha
Book Image

Network Automation Cookbook

By: Karim Okasha

Overview of this book

Network Automation Cookbook is designed to help system administrators, network engineers, and infrastructure automation engineers to centrally manage switches, routers, and other devices in their organization's network. This book will help you gain hands-on experience in automating enterprise networks and take you through core network automation techniques using the latest version of Ansible and Python. With the help of practical recipes, you'll learn how to build a network infrastructure that can be easily managed and updated as it scales through a large number of devices. You'll also cover topics related to security automation and get to grips with essential techniques to maintain network robustness. As you make progress, the book will show you how to automate networks on public cloud providers such as AWS, Google Cloud Platform, and Azure. Finally, you will get up and running with Ansible 2.9 and discover troubleshooting techniques and network automation best practices. By the end of this book, you'll be able to use Ansible to automate modern network devices and integrate third-party tools such as NAPALM, NetBox, and Batfish easily to build robust network automation solutions.
Table of Contents (15 chapters)

Creating custom Python filters for Ansible

Ansible provides a rich set of filters from Jinja2, as well as some additional built-in filters to manipulate data; however, in some cases, you may find that there is no filter available to satisfy your requirements. In this recipe, we will outline how to build custom filters in Python to extend Ansible functionality to manipulate data.

How to do it...

  1. In the project directory (ch13_ansible_best_practice), create a new folder, filter_plugins.
  1. Create a new Python script called under the filter_plugins folder, with the following content:
class FilterModule(object):
def filters(self):
return {
'acl_state': self.acl_state
def acl_state...