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Practical Virtualization for Learners

Get Started with Cloud Computing and Tools - VirtualBox, Vagrant, Wireshark, AWS, Azure, GCP, Ansible, Docker, and PostgreSQL

Okki Lee

We tend to learn more in the process of building something. However, it is difficult for learners to get started and to make hands dirty in cloud computing. This book presents the reader with a practical guide, from creating multiple virtual machines to running PostgreSQL replication on them, not trivial or too daunting.

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About

About

About the Book

This book starts with virtual machines in VirtualBox on a local computer (Windows 10, macOS or Linux) and briefly covers those in the cloud (AWS, Azure or GCP). It  will help the reader get started with cloud computing and have a feel in a short period of time through hands-on activities. Hopefully, the reader will familiarize herself/himself with some important concepts (virtualization, virtual machines, hypervisors, automation, containers and networking) and tools (VirtualBox, Vagrant, Ansible, Wireshark, Docker and PostgreSQL).

If you prefer a kindle edition, you can get it here: https://www.amazon.com/dp/B082G9ZXTC?ref=aw_sitb_digital-text

Also, a paperback edition here: https://www.amazon.com/Practical-Virtualization-Learners-Personal-Computer/dp/0648741621/

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Cloud Computing

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Author

About the Author

Okki Lee

Okki Lee has worked at LG R&D Lab, CSIRO and Korea Meteorological Administration in the area of information technology over twenty years. Lee received a bachelor’s degree in mathematics from Seoul National University and earned his doctorate in computer science at the University of Nottingham.

Contents

Table of Contents

Cover

Title Page

Preface

Chapter 1 VirtualBox 1

Creating a virtual machine

Importing a guest appliance

Up and running a virtual machine using Vagrant

Ubuntu 18.04 on Windows 10

Graphical User Interface on Ubuntu 18.04

CentOS 7 on Ubuntu 18.04

Cloning a virtual machine using VirtualBox GUI

Exercises

Chapter 2 Networking in virtual machines 11

Networking basics

Networking modes in VirtualBox

NAT adapter in virtual machines

Establishing a network between two virtual machines

Configuring VirtualBox

Configuring network interfaces in virtual machines

Wireshark on a virtual machine

Seeing network protocols between two virtual machines

Exercises

Chapter 3 Vagrant for multiple virtual machines 26

Creating multiple virtual machines with configurations

Stopping/destroying multiple virtual machines

Establishing SSH connections between virtual machines

Generating a pair of public/private keys

Copying the public key file to the target

Exercises

Chapter 4 Ansible 35

Ansible on Ubuntu 18.04

Configuration of Ansible

Ansible Playbook

Running Ansible playbook on VirtualBox VMs

Provisioning Ansible via Vagrant

Exercises

Chapter 5 Virtual machines in the cloud 48

Virtual machines on AWS

A pair of SSH public and private keys

Copy and paste the public key

SSH Access to AWS EC2 instances

Running Ansible playbook on AWS

Virtual machines on Azure

SSH Access to Azure virtual machines

Ansible configuration on Azure

Running Ansible playbook on Azure

Virtual machines on Google Cloud Platform

SSH Access to VM instances

Uploading a public key file to Metadata

Running Ansible playbook on GCP

Exercises

Chapter 6 PostgreSQL Replication 64

Preparation

Ansible playbook for PostgreSQL

PostgreSQL Replication

Step 1 Configure the master and the slave

Step 2 Create a database on the master and verify that it is propagated

Exercises

Chapter 7 PostgreSQL in Docker 76

Preparation

Running multiple containers using docker-compose

Preparation

Bring up the containers with docker-compose

Ping test between two containers

PostgreSQL replication in Docker

Step 1 Configure the master and the slave

Step 2 Create a sample database and populate the master

Step 3 Verify the sample database has been replicated to the slave

Exercises

Chapter 8 Summary 97

Answers to Selected Exercises 98

Acknowledgments 115

About the author 116

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