Mastering Go Network Automation: Automating Networks, Container Orchestration, Kubernetes with Puppet, Vegeta and Apache JMeter
By Ian Taylor
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About this ebook
"Mastering Go Network Administration" is a structured beginning for network administrators looking to improve network efficiency, scalability, and security. This book provides a one-stop solution for all of your network administration needs, with comprehensive coverage of automation, security, containerization,
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Mastering Go Network Automation - Ian Taylor
Mastering Go Network Automation
Automating Networks, Container Orchestration, Kubernetes with Puppet, Vegeta and Apache JMeter
Ian Taylor
Content
Preface
Chapter 1: Go Essentials for Networks
Why Go for Networking?
Overview
Features of Networking
Overview of Network Automation
Understanding Data Types
Boolean
Numeric Types
All about Loops!
For Loop
While Loop
Range Loop
Infinite Loop
Nested Loop
Early Exit
Continue Statement
Exploring Functions
Defining Functions
Calling Functions
Return Values
Multiple Return Values
Variadic Functions
Anonymous Functions
File Handling in Go
Creating a File
Opening a File
Writing to a File
Reading from a File
Appending to a File
Deleting a File
Go Modules
What is a Module?
Creating a Module
Adding Dependencies
Managing Dependencies
Using a Module
Publishing a Module
My First Go Script
Summary
Chapter 2: Setting Up Network Automation Environment
Components of a Network Automation Lab
Virtualization Environment
Network Devices
Configuration Management
Monitoring and Logging
Testing Framework
Scripting and Automation
Security
Install EVE-NG Network Simulator
Download EVE-NG Community Edition
Install Dependencies
Install EVE-NG
Configure EVE-NG
Import EVE-NG Images
Create a Network Topology
Configure the Devices
Save and Export the Topology
Install Go for Network Automation Lab
Download Go
Install Go
Verify Go Installation
Set up a Go Workspace
Test the Go Installation
Install Vim IDE
Install Vim
Install Vundle
Configure Vim
Install Plugins
Configure Plugins
Configure Go Networking Libraries
Import the Net Package
Create a TCP Listener
Create a UDP Connection
Use the HTTP Package
Use the SSH Package
Configure Ports with Go
Import os/exec
Package
Use exec.Command
Function
Use exec.Output
Function
Use os/exec
Package to Configure Ports
Use os
Package to Configure Ports
Summary
Chapter 3: Configuring Modern Networks
Components of Modern Networks
Hosts
Servers
Networks
Types of Networks
Configure Hosts
Import os/exec
Package
Use exec.Command
Function to Run Command
Use exec.Output
Function to Capture Output
Use os/exec
Package to Configure Multiple Hosts
Use os
Package to Configure Hosts
Configure Servers
Import os/exec
Package
Use exec.Command
Function to Run Command
Use exec.Output
Function to Capture Output
Use os/exec
Package to Configure Multiple Servers
Use os
Package to Configure Servers
Configure Network Encryption
Import crypto/tls
Package
Use tls.Dial
Function to Create TLS Connection
Use tls.Listen
Function to Listen TLS Connections
Use tls.Config
Struct to Configure TLS Connection
Use crypto/rand
Package to Generate Random Numbers
Use crypto/tls
Package to Create Self-Signed Certificate
Verify the TLS Connection
Test Simulator, Ports, Hosts and Server
Testing the Simulator
Testing Installed Libraries
Testing Ports
Testing Hosts
Testing Servers
Summary
Chapter 4: Write, Test and Validate Automation Scripts
Understanding Go Network Automation Scripts
Procedure to Code Network Automation Scripts
Ways to Write Automation Scripts
Write, Test and Validate Automation Scripts
Define Scope of Script
Install Required Libraries
Write Codes
Test the Script
Validate the Script
Iterate and Improve the Script
Document the Script
Define Variables for Automation Scripts
Declare the Variable
Initialize the Variable
Use the Variable
Sample Program to Define Variables
Automate Configuring Host Name
Import Required Packages
Define Connection Parameters
Establish SSH Connection
Send Commands to Device
Test and Validate the Code
Testing Automation Script in Test Environment
Set up a Test Environment
Copy Automation Code to Test Environment
Test the Code
Sample Program of Testing Automation Script in Test Environment
Debug Errors in Testing
Install Go Debugger
Add Breakpoints to Code
Run the Code with Debugger
Inspect Program's State
Continue Execution
Validate Automation Scripts in Production
Prepare the Production Environment
Build and Package the Code
Copy Binary to Production Device
Run the Code on Production Device
Verify the Configuration Changes
Repeat Steps 1-5 for Each Device
Summary
Chapter 5: Automation of Configuration Management
Neccessity of Configuration Management
Overview
Benefits of Configuration Management
Role of Go in Configuration Management
Server Provisioning with Puppet and Go
Install Puppet on Server(s)
Apply Puppet Manifest to Server(s)
Automation of System Settings
Importing Necessary Packages
Defining Function to Set Timezone
Calling the Function
Building and Running the Program
Automating the Process
Modify Base Configurations
Identify Base Configurations to Modify
Write the Go Script
Apply the Changes
Verify the Changes
Automating System Identification
Install Puppet and Go
Define Puppet Manifests
Write Go Scripts
Run the Go Script
Automating System Patches and Updates
Create New Directory for Project
Initialize New Go Module in Directory
Create New Go File ‘main.go’ and Import Necessary Packages
Create Puppet Manifest ‘patching.pp’ to Manage Go Code
Apply the Puppet Manifest
Identifying Unstable and Non-compliant Configuration
Install InSpec
Create an InSpec Profile
Define Policies and Rules
Run InSpec Audit
Integrate with Go
Summary
Chapter 6: Networking with Container and Docker
Understanding Docker and Containers
Overview
Role of Go in Containerization
Installing Docker
Building Docker Images
Install Docker
Create a Dockerfile
Build the Docker Image
Verify the Docker Image
Running Containers
Create a Go Program
Build the Docker Image using Dockerfile
Run the Docker Container
Automate Container Operations
Install Docker and Docker Compose
Define the Container Configurations
Build and Start the Containers
Test the Running Containers
Stop and Remove the Containers
Managing Container Networks
Need of Container Networking
Managing Containers using Docker CLI
Summary
Chapter 7: Orchestrating Containers and Automating Workloads
Networking for Container Workloads
Understanding Container Scheduling
Container Scheduling Techniques
Role of Networking Automation for Containers
Service Discovery
Automating Service Discovery with Zookeeper
Understanding Service Discovery
Practical Demonstration to Automate Service Discovery
Essentials of Load Balancers
Add or Remove Servers using Traefik
Understanding Traefik
Procedure to Add/Remove Servers from Load Balancers
Configure Load Balancing Algorithms
Summary
Chapter 8: Automate SSL, Container-native Storage and Performance
SSL Security Protocol
Automate Setting Up SSL Certificates
Install and Import Necessary Libraries
Create New HTTPS Server
Generate Self-signed SSL Certificate
Container-native Storage
Manage Container Storage using Docker
Procedure to Work with Docker Storage
Using Docker Client to Create New Container
Create File inside Container
Benefit of Container Performance
Using Go to Monitor Container Performance
Automate Deployment of Updates
Summary
Chapter 9: Kubernetes Automation
Kubernetes Networking
Understanding Kubernetes In-Detail
Networking Makes Kubernetes Easy
Advantages of Kubernetes Networking
Inside Kubernetes Networking
Role of Go Networking Inside Kubernetes
Go Tools for Kubernetes Networking
Setup K8s Cluster with kubeadm
Sample Program to Setup Kubernetes Cluster
Envoy Ingress Controllers
Introducing Envoy
Benefits of Envoy
Deploy Envoy Ingress Controllers using Go
Detailed Steps of Envoy Deployment
Sample Program to Deploy Envoy
Install the Required Dependencies
Deploy Envoy Ingress Controller using Helm
Create an Ingress Resource
Summary
Chapter 10: Service Mesh, Firewall and Network Policies
Understanding Service Mesh
Overview
Advantages of Service Mesh
Service Mesh Tools
Service Mesh with Linkerd
Procedure to Adopt Service Mesh
Sample Program to Implement Linkerd Service Mesh
Install and Configure Linkerd
Deploy the Application
Create a Service
Install Linkerd Proxy
Verify the Setup
Automate Firewall Configuration
Install the Necessary Packages
Define Firewall Rules
Create Go Program to Automate Firewall Configuration
Test the Program
Automate the Program
Sample Program to Automate Firewall
Automate Linkerd Network Policies
Sample Program to Automate Network Policies
Summary
Chapter 11: Network Performance Testing
Performance Testing
Importance of Performance Testing
Tasks and Operations Involved in Performance Testing
Automate Load Testing
Volume Testing
Stress Testing
Spike Testing
Soak Testing
Endurance Testing
Benefits of Load Testing
Enhanced User Experience
Increased Productivity
Reduced Downtime
Exploring Go Vegeta Tool
Overview
Benefits of Vegeta Testing Tool
Sample Program to Run Load Testing
Stress Testing
Overview
Go Tools for Stress Testing
Procedure to Run Stress Testing
Install Stress Testing Tool
Create Test File
Run the Test
Sample Program to Run Stress Testing
Install Vegeta
Write a Test Script
Run the Test
Analyze the Results
Scalability Testing
Overview
Techniques of Scalability Testing
Exploring Apache JMeter
Using Apache JMeter with Go
Procedure to Run Apache JMeter Testing
Sample Program to Run Scalability Testing with Apache JMeter
Summary
Preface
Mastering Go Network Automation
is a structured beginning for network administrators looking to improve network efficiency, scalability, and security. This book provides a one-stop solution for all of your network administration needs, with comprehensive coverage of automation, security, containerization, monitoring, and performance testing.
Beginning with the fundamentals of creating a network automation lab with the EVE-NG network simulator and the Go programming language, readers will learn the step-by-step process of installing EVE-NG, followed by the importance of service mesh in automation and how it can simplify network operations.
The book delves deeply into critical topics such as deploying ingress controllers and implementing service mesh with Linkerd. Readers will learn about container-native storage, container storage management with Docker, and automating SSL certificates, firewall configuration, and network policies.
Monitoring and performance tuning are also covered in the book, including how to monitor container performance and automatically roll out updates. The book concludes with a discussion of performance testing strategies like load testing, stress testing, and scalability testing. It shows readers how to find performance bottlenecks and optimise their network with the help of tools like Vegeta and Apache JMeter through the use of real-world examples.
In this book you will learn how to:
Setting up an EVE-NG network simulator, VIM IDE, kubeadm, and a comprehensive network automation lab to improve network efficiency, scalability, and security.
Configuring ports, hosts, and servers using Go scripting to streamline network automation.
Writing, testing, and validating network automation scripts to ensure smooth and reliable network administration.
Building Docker images, running containers, and managing container deployments for efficient containerization.
Automating load balancing, firewall configuration, and Kubernetes network policies for seamless network management.
Working with popular tools such as Puppet, Zookeeper, Traefik, Envoy, and various Go networking packages.
Automating SSL setup, container storage, container performance monitoring, and rolling updates.
Using powerful load testing tools like Vegeta and Apache JMeter for efficient load testing, stress testing, and scalability testing to identify and eliminate performance bottlenecks.
GitforGits
Prerequisites
If you're a network administrator who wants to level up your game, Mastering Go Network Administration
is the book for you. This book will help you become a more efficient, effective, and confident network administrator by providing clear explanations, practical examples, and comprehensive coverage.
Codes Usage
Are you in need of some helpful code examples to assist you in your programming and documentation? Look no further! Our book offers a wealth of supplemental material, including code examples and exercises.
Not only is this book here to aid you in getting your job done, but you have our permission to use the example code in your programs and documentation. However, please note that if you are reproducing a significant portion of the code, we do require you to contact us for permission.
But don't worry, using several chunks of code from this book in your program or answering a question by citing our book and quoting example code does not require permission. But if you do choose to give credit, an attribution typically includes the title, author, publisher, and ISBN. For example, Mastering Go Network Automation by Ian Taylor
.
If you are unsure whether your intended use of the code examples falls under fair use or the permissions outlined above, please do not hesitate to reach out to us at [email protected].
We are happy to assist and clarify any concerns.
Acknowledgement
Ian Taylor expresses his gratitude to all of the other contributors to Go and work tirelessly to improve the quality of the programming language. Ian would want to express his gratitude to the copywriters, tech editors, and reviewers who helped create a powerful yet simple book that outperforms Go coding in a relatively short period of time. And, lastly to his entire family and friends extending their support to finish the project at the earliest.
Chapter 1: Go Essentials for Networks
Why Go for Networking?
Overview
Go, also known as Golang, is a programming language that was developed by Google in 2007. It is an open-source language that was designed with the goal of simplifying the process of developing high-performance network applications. The language's syntax is simple and easy to learn, and it is known for its efficiency, scalability, and reliability. Due to these features, Go has become increasingly popular for network programming and network automation.
Network programming refers to the development of applications that communicate over a network. These applications can include web servers, microservices, and other network-based services.
Features of Networking
Go provides a number of features that make it well-suited for network programming. These features include:
● Concurrency: Go has built-in support for concurrency, which allows developers to write applications that can handle multiple tasks simultaneously. This is particularly useful for network programming, where applications need to handle multiple requests and responses at the same time.
● Garbage collection: Go has an efficient garbage collector that automatically frees up memory that is no longer in use. This feature makes it easy for developers to write network applications without worrying about memory management.
● Standard library: Go comes with a comprehensive standard library that includes