Mastering Python Networking: Utilize Python packages and frameworks for network automation, monitoring, cloud, and management, 4th Edition

Cover
Copyright
Contributors
Table of Contents
Preface
Chapter 1: Review of TCP/IP Protocol Suite and Python
	An overview of the Internet
		Servers, hosts, and network components
		The rise of data centers
			Enterprise data centers
			Cloud data centers
			Edge data centers
	The OSI model
	The client-server model
	Network protocol suites
		The transmission control protocol
			Functions and characteristics of TCP
			TCP messages and data transfer
		The user datagram protocol
		The Internet protocol
			IP network address translation (NAT) and network security
			IP routing concepts
	Python language overview
		Python versions
		Operating system
		Running a Python program
		Python built-in types
			The None type
			Numerics
			Sequences
			Mapping
			Sets
		Python operators
		Python control flow tools
		Python functions
		Python classes
		Python modules and packages
	Summary
Chapter 2: Low-Level Network Device Interactions
	The challenges of the CLI
	Constructing a Virtual lab
		Physical devices
		Virtual devices
		Cisco modeling labs
			CML tips
		Cisco DevNet
		GNS3 and others
	Python virtual environment
	Python pexpect library
		Pexpect installation
		Pexpect overview
		Our first Pexpect program
		More Pexpect Features
		Pexpect and SSH
		Pexpect complete example
	The Python Paramiko library
		Installation of Paramiko
		Paramiko overview
		First Paramiko program
		More Paramiko features
			Paramiko for servers
		More Paramiko examples
	The Netmiko library
	The Nornir framework
		Downsides of Pexpect and Paramiko compared to other tools
			Idempotent network device interaction
			Bad automation speeds up bad things
	Summary
Chapter 3: APIs and Intent-Driven Networking
	Infrastructure-as-Code (IaC)
		Intent-driven networking
		Screen scraping versus API structured output
		Data modeling for IaC
		YANG and NETCONF
	Cisco API examples
		Cisco NX-API
			Lab preparation
			NX-API examples
		The Cisco YANG Model
		The Cisco ACI examples
	Cisco Meraki controller
	The Python API for Juniper Networks
		Juniper and NETCONF
			Device preparation
			Juniper NETCONF examples
		Juniper PyEZ for developers
			Installation and preparation
			PyEZ examples
	The Arista Python API
		Arista eAPI management
			eAPI preparation
			eAPI examples
		The Arista Pyeapi library
			Pyeapi installation
			Pyeapi examples
	VyOS example
	Other libraries
	Summary
Chapter 4: The Python Automation Framework – Ansible
	Ansible – A More Declarative Framework
		Ansible Versions
	Our First Ansible Network Example
		The Control Node Installation
		Lab Topology
			The Variable Files
			Our First Playbook
	The Advantages of Ansible
		Agentless
		Idempotence
		Simple and Extensible
	Ansible Content Collections
	More Ansible Network Examples
		Inventory Nesting
		Ansible Conditionals
		Configuration Change
		Ansible Network Facts
		Ansible Loops
			Standard Loops
			Looping over Dictionaries
		Templates
			The Jinja Template Variables
			Jinja Template Loops
			Jinja Template Conditional
	Summary
Chapter 5: Docker Containers for Network Engineers
	Docker Overview
		Advantages of Docker
	Building Python applications in Docker
		Installing Docker
		Useful Docker commands
		Building hello world
		Building our application
		Sharing Docker images
		Container orchestration with Docker-compose
	Container networking
		Container host network
		Custom bridge network
		Other container network options
	Containers in the network engineering field
		Containerlab
	Docker and Kubernetes
	Summary
Chapter 6: Network Security with Python
	The Lab Setup
	Python Scapy
		Installing Scapy
		Interactive examples
		Packet captures with Scapy
		The TCP port scan
		The ping collection
		Common attacks
		Scapy resources
	Access lists
		Implementing access lists with Ansible
		MAC access lists
	The Syslog search
		Searching with the regular expression module
	Other tools
		Private VLANs
		UFW with Python
	Further reading
	Summary
Chapter 7: Network Monitoring with Python – Part 1
	Lab Setup
	SNMP
		Setup
		PySNMP
	Python for Data Visualization
		Matplotlib
			Installation
			Matplotlib – the first example
			Matplotlib for SNMP results
			Additional Matplotlib resources
		Pygal
			Installation
			Pygal – the first example
			Pygal for SNMP results
			Additional Pygal resources
	Python for Cacti
		Installation
		Python script as an input source
	Summary
Chapter 8: Network Monitoring with Python – Part 2
	Graphviz
		Lab setup
		Installation
		Graphviz examples
		Python with Graphviz examples
		LLDP neighbor graphing
			Information retrieval
			Python parser script
			Testing the playbook
	Flow-based monitoring
		NetFlow parsing with Python
			Python Socket and Struct
	ntop traffic monitoring
		Python extension for ntop
		sFlow
			SFlowtool and sFlow-RT with Python
	Summary
Chapter 9: Building Network Web Services with Python
	Comparing Python web frameworks
	Flask and lab setup
	Introduction to Flask
		Flask versions
		Flask examples
		The HTTPie client
		URL routing
		URL variables
		URL generation
		The jsonify return
	Network resource API
		Flask-SQLAlchemy
		The network content API
		The devices API
		The device ID API
	Network dynamic operations
		Asynchronous operations
	Authentication and Authorization
	Running Flask in containers
	Summary
Chapter 10: Introduction to Async IO
	Asynchronous operations overview
		Python multiprocessing
		Python multithreading
	Python asyncio module
	The Scrapli project
		Scrapli example
		Scrapli async example
	Summary
Chapter 11: AWS Cloud Networking
	AWS setup
		The AWS CLI and Python SDK
	AWS network overview
	Virtual Private Cloud
		Route tables and route targets
		Automation with CloudFormation
		Security Groups and Network ACLs
		Elastic IP
		NAT gateways
	Direct Connect and VPN
		VPN gateways
		Direct Connect
	Network scaling services
		Elastic Load Balancing
		Route 53 DNS service
		CloudFront CDN services
	Other AWS network services
	Summary
Chapter 12: Azure Cloud Networking
	Azure and AWS network service comparison
	Azure setup
	Azure administration and APIs
		Azure service principals
		Python versus PowerShell
	Azure global infrastructure
	Azure virtual networks
		Internet access
		Network resource creation
		VNet service endpoints
		VNet peering
	VNet routing
		Network security groups
	Azure VPNs
	Azure ExpressRoute
	Azure network load balancers
	Other Azure network services
	Summary
Chapter 13: Network Data Analysis with Elastic Stack
	What is the Elastic Stack?
	Lab topology
	Elastic Stack as a service
	First End-to-End example
	Elasticsearch with a Python client
	Data ingestion with Logstash
	Data ingestion with Beats
	Search with Elasticsearch
	Data visualization with Kibana
	Summary
Chapter 14: Working with Git
	Content management considerations and Git
	Introduction to Git
		Benefits of Git
		Git Terminology
		Git and GitHub
	Setting up Git
		Gitignore
	Git Usage Examples
	Git Branch
		GitHub Example
			Collaborating with Pull Requests
	Git with Python
		GitPython
		PyGitHub
	Automating Configuration Backup
	Collaborating with Git
	Summary
Chapter 15: Continuous Integration with GitLab
	The traditional change management process
	Introduction to continuous integration
	Installing GitLab
	GitLab runners
	First GitLab example
	GitLab network example
	Summary
Chapter 16: Test-Driven Development for Networks
	Test-driven development overview
		Test definitions
	Topology as code
		XML parsing example
		Python’s unittest module
		More on Python testing
		pytest examples
	Writing tests for networking
		Testing for reachability
		Testing for network latency
		Testing for security
		Testing for transactions
		Testing for network configuration
		Testing for Ansible
	pyATS and Genie
	Summary
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