Book Image

Mastering Python Networking - Third Edition

Book Image

Mastering Python Networking - Third Edition

Overview of this book

Networks in your infrastructure set the foundation for how your application can be deployed, maintained, and serviced. Python is the ideal language for network engineers to explore tools that were previously available to systems engineers and application developers. In Mastering Python Networking, Third edition, you’ll embark on a Python-based journey to transition from traditional network engineers to network developers ready for the next-generation of networks. This new edition is completely revised and updated to work with Python 3. In addition to new chapters on network data analysis with ELK stack (Elasticsearch, Logstash, Kibana, and Beats) and Azure Cloud Networking, it includes updates on using newer libraries such as pyATS and Nornir, as well as Ansible 2.8. Each chapter is updated with the latest libraries with working examples to ensure compatibility and understanding of the concepts. Starting with a basic overview of Python, the book teaches you how it can interact with both legacy and API-enabled network devices. You will learn to leverage high-level Python packages and frameworks to perform network automation tasks, monitoring, management, and enhanced network security followed by Azure and AWS Cloud networking. Finally, you will use Jenkins for continuous integration as well as testing tools to verify your network.
Table of Contents (18 chapters)
16
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17
Index

Lab preparation

For this chapter, we will continue to use the same lab topology we used in Chapter 4, The Python Automation Framework – Ansible Basics. We will also follow the best practice suggested with offloading the host variables in a host_vars directory. We will also use a few options on ansible.cfg such as disabling host_key_checking and Python interpreter discovery.

For more information on the ansible.cfg options: host_key_checking: https://docs.ansible.com/ansible/latest/user_guide/intro_getting_started.html#host-key-checking; and Python interpreter discovery: https://docs.ansible.com/ansible/latest/reference_appendices/config.html.

We will follow the Ansible version and file structure as illustrated below:

$ ansible --version
ansible 2.8.5
$ tree host_vars/
host_vars/
├── ios-r1
└── ios-r2
<skip>

$ cat ansible.cfg 
[defaults]
host_key_checking...