You're reading from Linux: Powerful Server Administration Recipes for CentOS 7, RHEL 7, and Ubuntu Server Administration

Product type Course

Published in Apr 2017

Publisher Packt

ISBN-13 9781788293778

Length 995 pages

Edition 1st Edition

Tools

CentOS

Concepts

System Administration

Authors (4):

Uday Sawant

William Leemans

Jonathan Hobson

Oliver Pelz

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Table of Contents (6) Chapters

Preface

1. Module 1 FREE CHAPTER

2. Module 2

3. Module 3

Bibliography

Index

Chapter 6. Orchestrating with Ansible

In this chapter, the following recipes will be addressed:

Installing Ansible
Configuring the Ansible inventory
Creating the template for a kickstart file
Creating a playbook to deploy a new VM with kickstart
Creating a playbook to perform system configuration tasks
Troubleshooting Ansible

Introduction

Ansible is an easy-to-use agentless system configuration management tool. It allows us to deploy complex configurations without the hassle of a complex interface or language.

Ansible uses playbooks, which are collections of tasks to deploy configurations and applications to multiple nodes over SSH in a controlled way. However, it doesn't stop there.

Ansible's modules, which are used to execute tasks, are all built to be idempotent in their execution.

The definition of Idempotence, according to Wikipedia, is as follows:

Idempotence (/?a?d?m'po?t?ns/ eye-d?m-poh-t?ns [citation needed]) is the property of certain operations in mathematics and...

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Authors (4)

Uday Sawant

Uday Sawant has completed Master's in Computer Applications from Mumbai University. He is skilled with more than four years of experience in software development and operations field. Before working as a software developer, he worked extensively with server hardware as a system administrator. He is an expert with the LAMP stack, JavaScript, and cloud infrastructure. Before starting as a software developer, he worked extensively with server hardware and has 2+ years' experience as system administrator. Currently, he is working as Software Scientist in a Mumbai based start-up called Sweetcouch. His responsibilities include developing back-end services, setting up a real-time communication server, and automating various daily tasks. With an immense interest in Machine Learning, he likes to spend his spare time exploring this subject. His first book was Instant Building Multipage Forms with Yii published by Packt publishing

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William Leemans

William Leemans has over 20 years of experience in the IT industry in various positions and supporting several environments. In 2005, he started his own consulting company, Critter BVBA, in the hope of offering open source solutions to his customers, who are mainly enterprises. In 2010, William started supporting Red Hat products full time with the Federal Police, Belgium. Since then, he has moved on to support Red Hat products at Proximus and now Euroclear. William is a strong open source supporter and contributes where he can. He has a couple of projects running at GitHub (https://github.com/bushvin). During the course of writing this book, William recertified himself as a Red Hat Certified Engineer, hoping to one day become a Red Hat Certified Architect. When he's not tapping away at the keyboard of his laptop, William likes to play around with his two young children, listen to rock music (Foo Fighters, AC/DC, and Queens of the Stone Age are some of his favorites), and devising complicated and intricate plots for the stories that he runs at his biweekly roleplaying sessions with his friends.

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Jonathan Hobson

Jonathan is a web developer, systems engineer and applications programmer, who, for more than 20 years has been working behind the scenes to support companies, organizations and individuals around the world to realize their digital ambitions. With an honors degree in both English and History and as a respected practitioner of many computer languages Jonathan enjoys writing code, publishing articles, building computers, playing the video games and getting 'out and about' in the big outdoors. He has been using CentOS since its inception and over the years, it has not only earned his trust, but it has become his first choice server solution. CentOS is a first class community based enterprise class operating system, it is a pleasure to work with, and because of this Jonathan has written this book in order that his knowledge and experience can be passed on to others.

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Oliver Pelz

Oliver Pelz has more than 10 years of experience as a software developer and system administrator. He graduated with a diploma degree in Bioinformatics and is currently working at the German Cancer Research center in Heidelberg where he authored and co-authored several scientific publications in the field of Bioinformatics. Next to developing web applications and biological databases for his department and scientists all over the world he is administrating a division-wide Linux-based data center and has setup two high-performance CentOS clusters for the analysis of high-troughput microscope and genome sequencing data. He loves writing code, riding his mountainbike in the Black Forest of Germany and is an absolute Linux and open-source enthusiast for many years. He has contributed to several open-source projects in the past and also worked as a reviewer on the book Centos 7 High Performance. He maintains an IT tech blog at www.oliverpelz.de **********************************Acknowledgement************************************** I would like to thank my family and especially my wonderful wife Beatrice and little son Jonah for their patience and understanding for all these long working hours while writing this book. Also I would like to thank the folks at Packt Publishing for all their support and the opportunity to to write this book, it was a great pleasure for me. Last but not least I would like to thank Jonathan Hobson for writing the first edition of this book, without him no second edition of this book would have been possible. I would also like to thank all of the mentors that I've had over the years, especially Tobias Dykerhoff who introduced me to the whole world of Linux a long time ago and infected me with his enthusiasm about open-source and the free software movement. **********************************Dedication*********************************** This work is dedicated to my son Marlin Pelz who was stillborn on 2.10.15 just a few days before his expected date of delivery while writing the last few chapters of this book. Marlin, words can not express how much I miss you!

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You're reading from Linux: Powerful Server Administration Recipes for CentOS 7, RHEL 7, and Ubuntu Server Administration

Table of Contents (6) Chapters

Chapter 6. Orchestrating with Ansible

Introduction

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Authors (4)

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