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)
16
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17
Index

Azure Network Load Balancers

Azure offers load balancers in both the basic and standard SKU. When we discuss the load balancer in this section, we are referring to the Layer 4 TCP and UDP load distribution service instead of the Application Gateway Load Balancer (https://azure.microsoft.com/en-us/services/application-gateway/), which is a layer-7 load-balancing solution.

The typical deployment model is usually a one- or two-layer load distribution for an inbound connection from the internet:

Figure 33: Azure Load Balancer (source: https://docs.microsoft.com/en-us/azure/load-balancer/load-balancer-overview)

The load balancer hashes the incoming connection on a 5-tuple hash (source and destination IP, source and destination port, and protocol) and distributes the flow to one or more destinations. The Standard Load Balancer SKU is a superset of the basic SKU, therefore new designs should adopt the Standard Load Balancer.

As with AWS, Azure is constantly innovating with...