Book Image

Mastering Python Networking - Third Edition

By : Eric Chou
Book Image

Mastering Python Networking - Third Edition

By: Eric Chou

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)
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Writing your own custom module

By now, you may get the feeling that network management in Ansible is largely dependent on finding the right module for your task. There is certainly a lot of truth in that logic.

Modules provide a way to abstract the interaction between the managed host and the control machine; they allow us to focus on the logic of our operations. Up to this point, we have seen the major vendors providing a wide range of modules for Cisco, Juniper, and Arista.

Using the Cisco Nexus modules as an example, besides specific tasks such as managing the BGP neighbor (nxos_bgp) and the aaa server (nxos_aaa_server), most vendors also provide ways to run arbitrary show (nxos_command) and configuration commands (nxos_config). This generally covers most of our use cases.

Starting with Ansible 2.5, there is also the streamline naming and usage of network facts modules.

What if the device you are using does not currently have the module for the task...