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)

Running Ansible in check mode

In this recipe, we will outline how to run our Ansible playbooks in dry-run mode. This mode is also called check mode and, in this mode, Ansible will not perform any changes on the remotely managed nodes. We can consider this as a simulation run for our playbook that will make us understand which changes will be made by Ansible, if we execute the playbook in check mode.

How to do it...

  1. Update our ACL declaration in the ACLs.yml file with the new entry, as shown in the following code snippet:
< --- Output Omitted for brevity -- >
- src:
dport: dns
state: present
  1. Run the pb_push_acl.yml provision playbook using check mode...