Ansible For Linux by Examples E-Book

Luca Berton

• Herausgeber: Luca Berton
• Kategorie: Wissenschaft und neue Technologien
• Sprache: Englisch

Veröffentlichungsjahr: 2022

Beschreibung

Ansible is an Open Source IT automation tool. This book contains all of the obvious and not-so-obvious best practices of Ansible automation. Every successful IT department needs automation nowadays for bare metal servers, virtual machines, could, containers, and edge computing. Automate your IT journey with Ansible automation technology.
You are going to start with the installation of Ansible in Enterprise and Community Linux using the most command package manager and archives.
Each of the 100+ lessons summarizes a module: from the most important parameter to some Ansible code and real-life usage. Each code is battle proved in the real life. Simplifying mundane activities like creating a text file, extracting and archiving, fetching a repository using HTTPS or SSH connections could be automated with some lines of code and these are only some of the long lists included in the course.
There are some Ansible codes usable in all the Linux systems, some specific for RedHat-like, Debian-like, and Suse-like.
The 20+ Ansible troubleshooting lesson teaches you how to read the error message, how to reproduce, and the process of troubleshooting and resolution.
Are you ready to automate your day with Ansible?
Examples in the book are tested with the latest version of Ansible 2.9+ and Ansible Core 2.11+.

Leseprobe

Ansible For Linux by Examples

100+ Automation Examples For Linux System Administrator and DevOps

Luca Berton

This book is for sale at http://leanpub.com/ansibleforlinuxbyexamples

This version was published on 2022-04-08

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This is a Leanpub book. Leanpub empowers authors and publishers with the Lean Publishing process. Lean Publishing is the act of publishing an in-progress ebook using lightweight tools and many iterations to get reader feedback, pivot until you have the right book and build traction once you do.

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© 2022 Luca Berton

ISBN for EPUB version: 978-80-908536-4-5

ISBN for MOBI version: 978-80-908536-5-2

Table of Contents

Introduction

Whois Luca Berton

Ansible For Beginners With Examples

What is Ansible

Getting Started

Inventory

Playbook

Variables

Facts and Magic Variables

Vault

Conditional

Loop

Handler

Role

Ansible Best Practices

Install Ansible

Ansible terminology - ansible vs ansible-core packages

How to install Ansible in RedHat Enterprise Linux (RHEL) 8 with Ansible Engine

How to install Ansible in Ubuntu 20.04

How to install Ansible in Fedora 35

How to install Ansible in CentOS 9 Stream

How to install Ansible in SUSE Linux Enterprise Server (SLES) 15 SP3

How to install Ansible with PIP

How to install Ansible in RedHat Enterprise Linux 9 Beta

How to install Ansible in Amazon Linux 2 (AWS EC2)

How to install Ansible in Debian 11

Ansible For Linux

Ansible terminology - ansible_hostname vs inventory_hostname vs ansible_fqdn

Three options to Safely Limit Ansible Playbooks Execution to a Single Machine

Ansible modules - command vs shell

Test host availability - Ansible module ping

How to print a text or a variable during the execution with Ansible

Edit single-line text - Ansible module lineinfile

Edit multi-line text - Ansible module blockinfile

Pause execution - Ansible module pause

Execute command on the Ansible host - Ansible localhost

Read a file into a variable on host - Ansible lookup plugin file

Reboot remote hosts - Ansible module reboot

Checkout git repository via HTTPS - Ansible module git

Checkout git repository via SSH - Ansible module git

Copy files to remote hosts - Local to Remote - Ansible module copy

Copy files from remote hosts - Remote to Local - Ansible module fetch

Start and enable services on boot on Linux remote hosts - Ansible module service_facts, service

Restart services on remote hosts - Ansible module service

Stop and disable services on boot on remote hosts - Ansible module service_facts, service

Apply a file template - Ansible module template - HTML placeholder

Loop in file template - Ansible module template - Generate hosts file

Schedule a Cron Job task in Linux - Ansible module cron

How to Pass Variables to Ansible Playbook in command line? - Ansible extra variables

Break a string over multiple lines - Ansible Literal and Folded Block Scalar operators

Read a file from remote hosts - Ansible module slurp

Read an environment variable - Ansible lookup plugin env”

Set remote environment per task or play - Ansible environment statement

Permanently Set Remote System Wide Environment Variables on Linux - /etc/environment - Ansible module lineinfile

Ansible Code reuse: Roles and Collections with Ansible Galaxy

Download and Use Ansible Galaxy Role - ansible-galaxy and requirements.yml

Download and Use Ansible Galaxy Collection - ansible-galaxy and requirements.yml

Ansible for Linux Filesystem

Create an empty file - Ansible module file

Create a text file - Ansible module copy

Check if a file exists - Ansible module stat

How to create a directory with Ansible?

How to check if a directory exists in Ansible?

How to rename a file or directory using an Ansible task on a remote system?

Change file permission - Ansible module file

Add Execute Permission 755 Linux file - Ansible module file

Delete file or directory - Ansible module file

Download a file - Ansible module get_url

Extract an archive - Ansible module unarchive

Create a symbolic link (also symlink or soft link) in Linux - Ansible module file

Create a hard link in Linux - Ansible module file

Mount a Windows share in Linux SMB/CIFS - Ansible module mount

Mount an NFS share in Linux - Ansible module mount

Concatenate multiple files in a specific order - Ansible module template and YAML

Backup With Rsync - Local to Remote - Ansible module synchronize

Ansible For Linux User Management

Ansible create a user account

Ansible remove user account

Ansible change user password

Ansible disable user account

Ansible enable user account

Ansible user password expiration

Ansible creates a group

Ansible deletes a group account

Ansible changes the User Primary Group on Linux

Ansible adds a user to a secondary group(s)

Ansible Playbook Code interact with Web Services API

Submit a GET request to a REST API endpoint - Interact with web services - Ansible module uri

Token-Based Authentication in REST API - Interact with web-service - Ansible module uri - Authentication request using the REST API token

Ansible For Containers

Ansible install Docker in Debian-like systems

Ansible install Docker in RedHat-like systems

Install Red Hat CodeReady Containers to run OpenShift 4 in macOS

Create Kubernetes K8s or OpenShift OCP namespace project - Ansible module k8s

Install Zoom flatpak in Debian-like systems - Ansible module flatpak

Install Zoom flatpak in RedHat-like systems - Ansible module flatpak

Update Zoom flatpak(s) in Linux systems - Ansible module command

Install Spotify snap in Debian-like systems - Ansible module snap

Install Spotify snap in RedHat-like systems - Ansible module snap

Deploy Apache Web Server in a Docker Container for Debian-like systems - Ansible modules docker_image and docker_container

Deploy Apache Web Server in a Podman Container for RedHat-like systems - Ansible modules podman_image and podman_container

Ansible For Linux Security

Set sysctl kernel parameters - Ansible module sysctl

Load and Unload Kernel Modules in Linux - Ansible module modprobe

Set the SELinux Policy States and Modes on Linux - Ansible module selinux

Configure Kernel Parameters in RedHat-like Linux systems - Ansible system role

Enable or Disable SELinux Boolean on Linux - Ansible module seboolean

Enable or Disable Permissive Domain in SELinux policy on Linux - Ansible module selinux_permissive

Vulnerability Scanner/Detector Log4Shell Remote Code Execution Log4j (CVE-2021–44228) — Ansible log4j-cve-2021–44228

Ansible Playbook Code for RedHat-like systems

Register a system with Red Hat Subscription-Manager - Ansible module redhat_subscription

Install a package in RedHat like systems - Ansible module yum

Rolling Update RedHat like systems - Ansible module yum

Open firewall ports in RedHat like systems - Ansible module firewalld

Install Google Chrome in RedHat-like systems - Ansible module rpm_key, yum_repos

Install Microsoft Edge in RedHat-like systems - Ansible module rpm_key, yum_repository and yum

NFS Server - Export an NFS Share in RedHat-like systems: RHEL, CentOS, CentOS Stream, Fedora - Ansible modules yum, file, lineinfile, command, firewalld, service

Deploy a web server apache httpd on RedHat-like systems - Ansible modules yum, copy, service firewalld

Deploy a proxy server squid on RedHat-like systems - Ansible modules yum, template, service and firewalld

Deploy a web server apache httpd virtualhost on RedHat-like systems - Ansible modules yum, file, copy, template, service and firewalld

Ansible Playbook Code for Debian-like systems

Install a package in Debian like systems - Ansible module apt

Rolling Update Debian-like systems - Ansible module apt

Open firewall ports in Debian like systems - Ansible module ufw

Install Google Chrome in Debian-like systems - Ansible module apt_key, apt_repos

Install Google Chrome in Debian-like systems - Ansible module apt_key, apt_repos

Deploy a web server apache httpd on Debian-like systems - Ansible modules apt, copy, service and ufw

Deploy a web server apache httpd virtual host on Debian-like systems - Ansible modules apt, file, copy, template, command, ufw and service

Ansible Playbook Code for Suse-like systems

Install a package in Suse-like systems - Ansible module zypper

Install Google Chrome in Suse-like systems - Ansible module rpm_key, zypper_repo

Ansible Troubleshooting The Most Common Errors

Ansible troubleshooting - connection failed

Ansible troubleshooting - macOS fork error

Ansible troubleshooting - indentation error

Ansible troubleshooting - syntax error

Ansible troubleshooting - undefined variable

Ansible troubleshooting - invalid argument

Ansible troubleshooting - privilege escalation error

Ansible troubleshooting - missing sudo password and incorrect sudo password

Ansible troubleshooting - missing module parameter

Ansible troubleshooting - failure downloading

Ansible troubleshooting - chgrp failed

Ansible troubleshooting - not a valid attribute for a Play error

Ansible troubleshooting - fatal template error while templating string

Ansible troubleshooting - PowerShell incompatible with the sudo become plugin

Ansible troubleshooting - passwordless account

Ansible troubleshooting - user module password_expiry_min bug

Ansible troubleshooting - urlopen error

Ansible troubleshooting - destination does not exist

Ansible troubleshooting - “role not found” error

Ansible troubleshooting - permission denied Errno 13

Ansible troubleshooting - VARIABLE IS NOT DEFINED! ansible_hostname

Ansible troubleshooting - This command has to be run under the root user

Thank you

Guide

Begin Reading

Introduction

This book provides an introduction to the Ansible language.

Ansible is a popular open source IT automation technology for scripting applications in a wide variety of domains.

It is free, portable, powerful, and remarkably easy and fun to use.

This book is a tool to learn the Ansible automation technology with some real-life examples.

Whenever you are new to automation or a profession automation engineer, this book’s goal is to bring you quickly up to speed on the fundamentals of the core Ansible language.

Every successful IT department needs automation nowadays for bare metal servers, virtual machines, cloud providers, containers, and edge computing. Automate your IT journey with Ansible automation technology.

I’m going to teach you example by example how to accomplish the most common System Administrator tasks.

You are going to start with the installation of Ansible in Red Hat Enterprise Linux, Ubuntu, and macOS using the most command package manager and archives.

Each of the 100+ lessons summarizes a module: from the most important parameter to some live demo of code and real-life usage. Each code is battle proved in the real life. Console interaction and verification are included in every video. A mundane activity like creating a text file, extracting and archiving, fetching a repository using HTTPS or SSH connections could be automated with some lines of code and these are only some of the long lists included in the course.

There are some Ansible codes usable in all the Linux systems, some specific for RedHat-like, Debian-like, and Windows systems.

The 20+ Ansible troubleshooting lesson teaches you how to read the error message, how to reproduce, and the process of troubleshooting and resolution.

Are you ready to automate your day with Ansible?

Whois Luca Berton

I’m Luca Berton and we’re going to have a lot of fun together.

First of all, let me introduce myself.

I’ve been Ansible Technical Support Engineer of Red Hat, based in the Czech Republic, even if I’m Italian.

I’ve been more than 15 years System Administration, working with infrastructure, either on-premise or on the major cloud providers.

I’m an enthusiast of the Open Source support the community by sharing my knowledge in different events of public access.

I’m also a co-founder of my hometown Linux Users Group, visited by Richard Stallman, the founder of the Free Software Movement.

I consider myself a lazy person so I always try new ways to automate the repetitive task of my work.

After years of Perl, Bash, and python scripting I landed in Ansible technology. I took the certification and worked for more than a year with the Ansible Engineer Team.

I consider Ansible the best infrastructure automation technology nowadays, it’s human-readable, the learning curve is accessible, and very requested by the recruiters in the market.

This ultimate guide contains all of the obvious and not-so-obvious solutions using Ansible automation.

In every lesson of this course, I’m going to share with you one specific use case, the possible solution, the code, the execution, and the verification of the target system.

All these solutions are battle-tested and used by me in my everyday automation.

You could easily jump between lessons and review again all the times that you need.

Awards & Recognition

2022

Ansible Anwendertreffen - From Zero to Hero: How to build the Ansible Pilot Community - by Luca Berton (Red Hat CZ) 15:15 - 16:00 15 Feb 2022Red Hat Ansible Playbook included in RHSB-2021-009 Log4Shell - Remote Code Execution - log4j (CVE-2021-44228) 12 Jan 2022AWS Tip Set sysctl kernel parameters — Ansible module sysctl 12 Jan 2022The Ansible Bullhorn #41 - A Newsletter for the Ansible Developer Community 7 Jan 2022

2021

The Ansible Bullhorn #34 - A Newsletter for the Ansible Developer Community 17 Sep 2021

The course is going to keep track of the evolution of the Ansible technology adding more content whenever is needed.

Are you ready to have fun?