Name: Implementing DevOps with Ansible 2
Author: Jonathan McAllister
ISBN: 9781787126510

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Implementing DevOps with Ansible 2

Jonathan McAllister

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Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Why subscribe?
Customer Feedback
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Downloading the color images of this book
Errata
Piracy
Questions
DevOps Fundamentals
DevOps 101
Culture
Automation
Measurement
Sharing
The History of DevOps
Strides toward the future
DevOps in the Modern Software Organization
The DevOps assembly line
Correlations between a DevOps assembly line and manufacturing
DevOps architectures and practices
Encapsulated software development
Microservices
Continuous Integration and Continuous Delivery
Modularity
Horizontal scalability
Blue-green deployments
Artifact management and versioning
Symmetrical environments
Summary
Configuration Management Essentials
Understanding Configuration Management
Origins of Configuration Management
The Aims of Configuration Management
Scenario 1
Scenario 2
Scenario 3
Scenario 4
Basic Principles of Configuration Management
Configuration Management Best Practices
How Ansible Simplifies DevOps Implementations
Binary Artifact Management and Ansible
Summary
Installing, Configuring, and Running Ansible
Installing Ansible
Red Hat Enterprise Linux via Configuration Management
Apt for Debian/Apt for Ubuntu
Porting Ansible to Gentoo
PKG for FreeBSD
Pip for macOS
OpenCSW for Solaris/SunOS
Via Python pip
Once Ansible has been installed
Setting up authentication between the control server and hosts
The Ansible Architecture
Open source
Module-based
Agentless
Pluggable
Local automation execution using Ansible
Remote automation execution using Ansible
Container-oriented automation
The Ansible Command-Line Interface
Usage: ansible <host-pattern> [options]
Ansible command-line examples
Configuring Ansible
Common base configuration items
The Ansible Inventory
Defined inventory groups
Loose inventory items/hosts/devices
Executing playbook s and targeting specific inventory files and groups
Summary
Playbooks and Inventory Files
Ansible Playbook Constructs
The programming languages that make up a playbook
YAML
Jinja2 – a brief introduction
Constructing an Ansible playbook
Hosts
Variables (vars/vars_files)
Tasks/plays
Ansible Play s and Task s
Ansible plays
Ansible tasks
Multiline task parameters
Variables and Variable Files
Basic variable syntax
Variable files
Hosts and Inventory
Targeting Infrastructure
Ansible Modules
Managing packages in Ansible
Yum
The apt-get and dpkg
Managing users in Ansible
File and directory management in Ansible
Managing services in Ansible
Transferring files in Ansible
Summary
Playbooks – Beyond the Fundamentals
playbook s and Conditional Logic
Iterators and Loops
Basic loops using with_items
Nested loops using with_nested
Looping over hashes using with_dict
Iterating over files using with_file
Iterating over sequential numbers
The do until iterator
Iterating over inventory hosts using play_hosts
Includes
Play-level includes
Task-level includes
Dynamic includes
Ansible Roles
Ansible Register Variables
Simple Ansible registers
Accessing registers
Additional conditional logic with registers
Null or empty comparisons
Vars and Ansible registers
Iterating over register contents
Ansible Handlers
Summary
Jinja in Ansible
Introducing Jinja
Jinja2 Programming Constructs
Expressions, filters, and variables
Jinja string concatenation and manipulation
Basic arithmetic operations in Jinja
Compound math equations and order of operations in Jinja
Filters available
Conditional logic (if-then-else)
Loops and iterators
Simple counters
List iterators
Complex iterators using Jinja
Applying Jinja in Ansible Playbook s
Summary
Ansible Vault
The Ansible Vault Architecture
Basic Vault Usage
Encrypting an Ansible vault YAML file
To decrypt
To rekey an Ansible vault file
Editing in place
Decrypting the vault when running a playbook
Automatically decrypting using password files
Manually decrypting vault data
Real-world Ansible Vault Workflow
Ansible vault with roles
Summary
Ansible Modules and Libraries
Introducing Ansible Modules
Integrating Ansible with Other Technologies
Ansible with JIRA
Ansible and Git
Ansible and Jenkins
Ansible and Docker
Summary
Integrating Ansible with CI and CD Solutions
Overview of Continuous Integration
Continuous integration concepts and practices
Handling unfinished work
Branch by abstraction
Feature toggles
A/B testing patterns
Overview of Continuous Delivery
Continuous Delivery defined
Handling complex and long running builds and deployments
CI->CD feedback loop
Blue-green deployments
CI->CD anti-patterns
Ansible s Role in CI->CD
Ansible best practices in CI->CD
Integrating Ansible with Jenkins
The Jenkins Ansible plugin
The Jenkins Ansible API modules
The jenkins_job Ansible Module
Integrating Ansible with Vagrant
Leveraging Ansible for Vagrant provisioning
Summary
Ansible and Docker
Understanding Docker s Architecture
Understanding Docker containers as environments
Managing Docker Containers with Ansible
Creating Docker containers
Removing Docker containers
Launching and stopping Docker containers
Managing network access Docker containers
Using Ansible to Create Docker Images
Using Dockerfiles to launch Ansible playbooks
Managing Docker Images with Ansible
Pulling, pushing, and tagging images
Building and archiving Docker images
Saving and loading archived Docker images
Gathering Facts About Docker Containers
Summary
Extending Ansible
Understanding Ansible Plugins and its Architecture
When should we create a module?
Setting Up the Ansible Module Development Environment
Ansible module testing tool setup
Developing Hello World Ansible Module
Testing a developmental Ansible module
Reading input parameters
Adding custom facts to a module
Setting up the Ansible Plugin Development Environment
Understanding the Different Types of Plugins
Action plugins
Callback plugins
Connection plugins
Lookup plugins
Distributing Ansible plugins
Summary
Ansible Galaxy
Ansible Galaxy Fundamentals
The Ansible Galaxy website
The Ansible Galaxy command-line interface
Ansible Galaxy command-line options explained
The install subcommand
The delete subcommand
The import subcommand
The ifo subcommand
The init command
The list subcommand
The login subcommand
The remove subcommand
The search subcommand
The setup subcommand
The help command
Summary

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Implementing DevOps with Ansible 2