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Spis treści

Customizing Chef eBook -- spis treści

• Customizing Chef
• Dedication
• Foreword
• Preface
  • Who This Book Is For
  • How This Book Is Organized
  • Conventions Used in This Book
  • Using Code Examples
  • Safari Books Online
  • How to Contact Us
  • Acknowledgments
• I. Chef and Ruby 101
  • 1. Introduction
    • What Is Configuration Management?
    • So Why Chef?
    • Think Critically
    • Meet AwesomeInc
    • Criteria for Customization
      • How Do We Find Out When Our Chef Runs Are Failing, and Why?
      • How Do We Simplify Our Recipes to Reduce the Amount of Replicated Code?
      • How Do We Stop Our Developers and Ops Staff from Treading All over Each Others Changes?
    • State of the Customization Nation
      • Chef Supermarket
      • Development Tooling
      • Workflow Tooling
      • Knife Plugins
      • Handlers
      • Recipes and Resources
    • Chef Installation Types and Limitations
      • chef-solo
      • Open Source Chef
      • Local Mode
      • Private Enterprise Chef
      • Hosted Enterprise Chef
    • Prerequisites
      • Knife
      • Nodes and Clients
      • Cookbooks, Attributes, Roles, Environments, and Data Bags
      • Chef Search
      • Ruby
    • Assumptions
  • 2. Just Enough Ruby to Customize Chef
    • Ruby Is Object-Oriented
    • Ruby Is Dynamically Typed
    • Classes
      • Getter and Setter Methods
    • Variable Scoping
      • Local Variables
      • Class Instance Variables
    • Inheritance
    • Modules
      • Modules as Namespaces
      • Modules as Mixins
    • Using Other Classes and Modules
      • Local Classes
      • RubyGems
      • Built-in Classes
    • When Things Go Wrong
      • Exceptions
      • Handling Exceptions
      • Defining Custom Exception Types
    • Tying It All Together
      • File Operations
      • HTTP Requests
    • Summary
  • 3. Chef Internals
    • Chef Architecture
      • Chef Client Tools
      • Chef Server
    • Anatomy of a Chef Run
      • Get Configuration Data
        • Ohai
      • Authenticate/Register
      • Load and Build Node Object
      • Synchronize Cookbooks
      • SetUp RunContext
      • Load Cookbook Data
      • Converge Node
      • Finalize
    • Dry-Run and Why-Run
      • The Problem with Dry-Run
      • Why-Run Mode
      • Usefulness of Why-Run
    • Using the Source
      • Getting the Chef Source Code
      • Chef Source Structure
    • Tracing a chef-client Run
      • Execute the chef-client Command
      • Run the Real chef-client Script
      • The Chef::Application::Client Class
      • The Chef::Application::Client run_chef_client Method
      • The Chef::Client Class
      • The Chef::Client Class do_run Method
    • Summary
• II. Customizing Chef Runs
  • 4. Extending Ohai
    • Introduction
      • Ohai Attribute Collection
      • The Ohai Source Code
    • Ohai Example 1: Plugin Skeleton
    • Testing and Running Ohai Plugins
      • Testing Using irb
      • Running Using Chef
    • Ohai Example 2: Adding More to the Plugin
      • The Mash Object
      • Multiple collect_data Methods
      • Running example2.rb
    • Ohai Example 3: Multilevel Plugins
    • Summary
  • 5. Creating Handlers
    • Preparing a Test Environment
      • Create the Test chef-client Configuration
      • Create a Test Cookbook
      • Verify That the Test Environment Works Correctly
    • Introduction to Handlers
    • The Run Status Object
      • Run Status Methods
      • Run Information Methods
      • Run Object Methods
    • Handler Example 1: Start Handler
    • Handler Example 2: Report Handler
    • Handler Example 3: Exception Handler
    • Handlers: Summary and Further Reading
  • 6. Extending Chef Run Events
    • Introduction to the Event Dispatcher
    • Event Dispatcher Initialization
    • Publish Overview
    • Subscribe Overview
    • Creating Formatters
      • Formatter Example 1: Skeleton Formatter
      • Formatter Example 2: Slightly Less Skeletal
      • Formatter Example 3: Custom Event Methods
      • Setting the Default Formatter
      • Formatters: Summary and Further Reading
    • Creating Custom Subscribers
      • Subscriber Example 1: Skeleton Subscriber
      • Subscriber Example 2: Registration with Start Handlers
      • Subscriber Example 3: Custom Event Methods
      • Custom Subscribers: Summary
    • Revisiting AwesomeIncWhich Customization?
    • Summary
• III. Customizing Recipes
  • 7. Definitions and Libraries
    • Cookbook Structure Revisited
    • Creating a Test Environment
    • Definitions
      • What Is a Definition?
      • Definition Example 1: Skeleton
      • Adding Parameters
      • Definition Example 2: Using Parameters
      • Adding Resources
      • Definition Example 3: Using Resources
    • Libraries
      • What Is a Library?
      • Library Example 1: Modules and Mixins
      • Library Example 2: Methods in a Custom Namespace
      • Library Example 3: Extending Core Chef Classes
      • Summary and Further Reading
  • 8. Lightweight Resources and Providers
    • Introduction to Resources and Providers
      • Automatically Choosing Providers
      • Resources and ProvidersLightweight Versus Heavyweight
    • Introduction to LWRPs
    • LWRP Example 1: Getting Started with LWRPs
      • Example 1: Creating a Resource
      • Example 1: Creating a Provider
      • Example 1: Using Our LWRP in a Recipe
    • The LWRP Domain-Specific Language
      • Resource DSL
      • Provider DSL
    • LWRP Example 2: Extending the Provider
    • Provider Internals
      • Desired Resource State
      • Current Resource State
      • Identifying and Executing Changes
        • Keep it simple, keep it relevant
        • Pick your state object sensibly
        • Remember the criteria
      • Informing Chef About Updates
    • LWRP Example 3: Native Provider
      • Example 3: Preparing the Resource and Provider
      • Example 3: The load_current_resource Method
      • Example 3: Coding the Actions
    • Summary and Further Reading
  • 9. Heavyweight Resources and Providers
    • Introduction to HWRPs
      • Why Write HWRPs?
      • HWRPs in Cookbooks
    • HWRP Example 1: Getting Started with HWRPs
      • Example 1: Creating a Resource
      • Example 1: Creating a Provider
      • Example 1: Using Our HWRP in a Recipe
      • Example 1: Extending the Provider
    • Advanced HWRP Tricks
      • Mixing HWRPs and LWRPs
      • Overriding Automatic Provider Resolution
      • Implementing Multi-Provider Resources
    • HWRP Example 2: Extending the package Resource
      • Example 2: Creating a Provider
      • Example 2: Using Our Provider in a Recipe
      • Example 2: Tapping into Chefs Provider Mapping
    • Summary and Further Reading
• IV. Other Customizations
  • 10. Customizing Knife
    • The Knife Source Code
    • Introduction to Knife Plugins
    • Anatomy of a Knife Command
      • Step 1: Validate and Parse Options
      • Step 2: Load Plugins
      • Step 3: Get Subcommand Class
      • Step 4: Load Dependencies
      • Step 5: Create Subcommand Object
      • Step 6: Run Plugin
    • Creating a Test Environment
      • Prerequisites and Preparation
      • Verifying That the Test Environment Works Correctly
    • Knife Example 1: Wrapping an Existing Plugin
    • Presenting Presenters!
      • Chef::Knife::Core::GenericPresenter
      • Chef::Knife::Core::NodePresenter
    • The UI Class
      • User Interaction Methods
      • Message Output Methods
      • Other Output Methods
      • Object Editing Methods
      • HighLine Methods
    • Knife Example 2: Search Plugin
    • Working with Chef Objects
      • Loading Objects: Searching
      • Loading Objects: Direct Loading
      • Editing and Saving Objects Noninteractively
      • Editing and Saving Objects Interactively
      • Creating and Updating Objects from Files
    • Knife Example 3: Tying It All Together
    • Revisiting AwesomeIncPlugin Best Practices
    • Summary and Further Reading
  • 11. The Chef API
    • Introduction to the Chef API
      • So Why Use the Chef API?
      • Authenticating to the Chef API
    • Creating a Test Environment
    • API Example 1: Authenticating and Making a GET Request
    • The Chef::Rest Class
    • API Example 2: Combining Multiple API Requests
    • Error Handling
    • Secrets of the Chef API
      • The /_status Endpoint
      • Partial Search
    • Summary and Further Reading
  • 12. Contributing Your Customizations
    • Documentation
    • Supporting Your Code
    • Managing Contributions
    • Testing Your Software
      • Ruby and Infrastructure Testing Tools
      • Continuous Integration Tools
      • Chef-Specific Tooling
      • Further Reading
    • Versioning Your Software
      • Semantic Versioning
    • Licensing and Copyright
      • Copyright
      • Licensing Your Code
    • Distributing Your Customizations
      • Sharing the Source Code
      • Community Cookbooks
      • RubyGems
      • Distribution via Cookbook
    • Summary
  • A. Chef API Endpoints and Verbs
• Index
• Colophon
• Copyright