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Mastering Ansible - Second Edition.pdf

发布时间：2022-06-05 发布人：admin 分类：说明书 资料大小：17.69M 资料格式：pdf 举报 版权申诉
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    Cover
    Copyright
    Credits
    About the Author
    About the Reviewer
    www.PacktPub.com
    Customer Feedback
    Table of Contents
    Preface
    Chapter 1: System Architecture and Design of Ansible
    Ansible version and configuration
    Inventory parsing and data sources
    Static inventory
    Inventory variable data
    Dynamic inventories
    Runtime inventory additions
    Inventory limiting
    Playbook parsing
    Order of operations
    Relative path assumptions
    Play behavior directives
    Execution strategies
    Host selection for plays and tasks
    Play and task names
    Module transport and execution
    Module reference
    Module arguments
    Module transport and execution
    Task performance
    Variable types and location
    Variable types
    Accessing external data
    Variable precedence
    Precedence order
    Merging hashes
    Summary
    Chapter 2: Protecting Your Secrets with Ansible
    Encrypting data at rest
    Things Vault can encrypt
    Creating new encrypted files
    Password prompt
    Password file
    Password script
    Encrypting existing files
    Editing encrypted files
    Password rotation on encrypted files
    Decrypting encrypted files
    Executing Ansible-playbook with encrypted files
    Protecting secrets while operating
    Secrets transmitted to remote hosts
    Secrets logged to remote or local files
    Summary
    Chapter 3: Unlocking the Power of Jinja2 Templates
    Control structures
    Conditionals
    Inline conditionals
    Loops
    Filtering loop items
    Loop indexing
    Macros
    Macro variables
    name
    arguments
    defaults
    catch_kwargs
    catch_varargs
    caller
    Data manipulation
    Syntax
    Useful built-in filters
    default
    count
    random
    round
    Useful Ansible provided custom filters
    Filters related to task status
    shuffle
    Filters dealing with path names
    basename
    dirname
    expanduser
    Base64 encoding
    Searching for content
    Omitting undefined arguments
    Python object methods
    String methods
    List methods
    int and float methods
    Comparing values
    Comparisons
    Logic
    Tests
    Summary
    Chapter 4: Controlling Task Conditions
    Defining a failure
    Ignoring errors
    Defining an error condition
    Defining a change
    Special handling of the command family
    Suppressing a change
    Error recovery
    Rescue
    Always
    Summary
    Chapter 5: Composing Reusable Ansible Content with Roles
    Task, handler, variable, and playbook include concepts
    Including tasks
    Passing variable values to included tasks
    Passing complex data to included tasks
    Conditional task includes
    Tagging included tasks
    Task includes with loops
    Including handlers
    Including variables
    vars_files
    Dynamic vars_files inclusion
    include_vars
    extra-vars
    Including playbooks
    Roles
    Role structure
    Tasks
    Handlers
    Variables
    Modules and plugins
    Dependencies
    Files and templates
    Putting it all together
    Role dependencies
    Role dependency variables
    Tags
    Role dependency conditionals
    Role application
    Mixing roles and tasks
    Role includes
    Role sharing
    Ansible Galaxy
    Summary
    Chapter 6: Minimizing Downtime with Rolling Deployments
    In-place upgrades
    Expanding and contracting
    Failing fast
    The any_errors_fatal option
    The max_fail_percentage option
    Forcing handlers
    Minimizing disruptions
    Delaying a disruption
    Running destructive tasks only once
    Serializing single tasks
    Summary
    Chapter 7: Troubleshooting Ansible
    Playbook logging and verbosity
    Verbosity
    Logging
    Variable introspection
    Variable sub elements
    Subelement versus Python object method
    Debugging code execution
    Playbook debugging
    Debugging local code
    Debugging inventory code
    Debugging playbook code
    Debugging executor code
    Debugging remote code
    Debugging the action plugins
    Summary
    Chapter 8: Extending Ansible
    Developing modules
    The basic module construct
    Custom modules
    Simple module
    Module documentation
    Providing fact data
    The check mode
    Supporting the check mode
    Handling check mode
    Developing plugins
    Connection type plugins
    Shell plugins
    Lookup plugins
    Vars plugins
    The fact caching plugins
    Filter plugins
    Callback plugins
    Action plugins
    Distributing plugins
    Developing dynamic inventory plugins
    Listing hosts
    Listing host variables
    Simple inventory plugin
    Optimizing script performance
    Contributing to the Ansible project
    Contribution submissions
    The ansible repository
    Executing tests
    Unit tests
    Integration tests
    Code style tests
    Making a pull request
    Summary
    Chapter 9: Infrastructure Provisioning
    Managing cloud infrastructure
    Creating servers
    Booting virtual servers
    Adding to runtime inventory
    Using OpenStack inventory source
    Interacting with Docker containers
    Building images
    Building containers without a Dockerfile
    Docker inventory
    Previewing of Ansible container
    Init
    Build
    Run
    Summary
    Index
    Mastering Ansible Second Edition Master the ins and outs of advanced operations with Ansible Jesse Keating BIRMINGHAM - MUMBAI
    Mastering Ansible Second Edition Copyright © 2017 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: November 2015 Second edition: March 2017 Production reference: 1270317 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78712-568-1 www.packtpub.com
    Credits Author Jesse Keating Reviewer Sreenivas Makam Acquisition Editor Prachi Bisht Content Development Editor Trusha Shriyan Copy Editor Safis Editing Project Coordinator Kinjal Bari Proofreader Safis Editing Indexer Pratik Shirodkar Technical Editor Varsha Shivhare Production Coordinator Nilesh Mohite Graphics Kirk D'Penha
    About the Author Jesse Keating is an accomplished Ansible user, contributor, and presenter. He has been an active member of the Linux and open source community for over fifteen years. He has first- hand experience with a variety of IT activities, software development, and large-scale system administration. He has presented at numerous conferences and meet-ups, and has written many articles on a variety of topics.
    About the Reviewer Sreenivas Makam is a senior engineering manager at Cisco Systems, Bangalore. He has a master's in electrical engineering and has around 18 years’ experience in the networking industry. He has worked in both startups and big, established companies. His interests include Containers, SDN, network automation, devops, and cloud technologies, and he likes to try out and follow open source projects in these areas. His blog can be found at h t t p s ://s r e e n i n e t . w o r d p r e s s . c o m /, he has presentations at h t t p ://w w w . s l i d e s h a r e . n e t /S r e e n i v a s M a k a m , and his hacky code is at h t t p s ://g i t h u b . c o m /s m a k a m . Sreenivas is a Docker Captain, (h t t p s ://w w w . d o c k e r . c o m /c o m m u n i t y /d o c k e r - c a p t a i n s ) and his blog articles have been published in Docker weekly newsletters. He can be reached on Twitter at @srmakam. He has written Mastering CoreOS, also reviewed Mastering Ansible, CoreOS Cookbook, all by Packt Publishing. It was extra special that my second daughter, Masha, was born while reviewing this book. Thanks to my daughters, Sasha and Masha, for keeping me energetic.
    www.PacktPub.com For support files and downloads related to your book, please visit www.PacktPub.com. Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at service@packtpub.com for more details. At www.PacktPub.com, you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks. h t t p s ://w w w . p a c k t p u b . c o m /m a p t Get the most in-demand software skills with Mapt. Mapt gives you full access to all Packt books and video courses, as well as industry-leading tools to help you plan your personal development and advance your career. Why subscribe? Fully searchable across every book published by Packt Copy and paste, print, and bookmark content On demand and accessible via a web browser
    Customer Feedback Thanks for purchasing this Packt book. At Packt, quality is at the heart of our editorial process. To help us improve, please leave us an honest review on this book's Amazon page at h t t p s ://w w w . a m a z o n . c o m /d p /1787282589. If you'd like to join our team of regular reviewers, you can e-mail us at customerreviews@packtpub.com. We award our regular reviewers with free eBooks and videos in exchange for their valuable feedback. Help us be relentless in improving our products!
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