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Spis treści

Ansible: Up and Running. 3rd Edition eBook -- spis treści

• Preface to the Third Edition
  • Conventions Used in This Book
  • Using Code Examples
  • OReilly Online Learning
  • How to Contact Us
  • Acknowledgments
    • From Lorin
    • From René
    • From Bas
• 1. Introduction
  • A Note About Versions
  • Ansible: What Is It Good For?
  • How Ansible Works
  • Whats So Great About Ansible?
    • Simple
      • Easy-to-read syntax
      • Easy to audit
      • Little to nothing to install on the remote hosts
      • Ansible scales down
      • Easy to share
      • System abstraction
      • Top to bottom tasks
    • Powerful
      • Batteries included
      • Push-based
      • Multitier orchestration
      • Masterless
      • Pluggable and embeddable
      • Works with lots of stuff
      • Really scalable
    • Secure
      • Codified knowledge
      • Reproducible systems
      • Equivalent environments
      • Encrypted variables
      • Secure transport
      • Idempotency
      • No daemons
  • Is Ansible Too Simple?
  • What Do I Need to Know?
  • What Isnt Covered
  • Moving Forward
• 2. Installation and Setup
  • Installing Ansible
    • Loose Dependencies
    • Running Ansible in Containers
    • Ansible Development
  • Setting Up a Server for Testing
    • Using Vagrant to Set Up a Test Server
    • Telling Ansible About Your Servers
    • Simplifying with the ansible.cfg File
    • Kill Your Darlings
  • Convenient Vagrant Configuration Options
    • Port Forwarding and Private IP Addresses
    • Enabling Agent Forwarding
  • The Docker Provisioner
  • The Ansible Local Provisioner
  • When the Provisioner Runs
  • Vagrant Plug-ins
    • Hostmanager
    • VBGuest
  • VirtualBox Customization
  • Vagrantfile Is Ruby
  • Production Setup
  • Conclusion
• 3. Playbooks: A Beginning
  • Preliminaries
  • A Very Simple Playbook
    • Specifying an NGINX Config File
    • Creating a Web Page
    • Creating a Group
  • Running the Playbook
  • Playbooks Are YAML
    • Start of Document
    • End of File
    • Comments
    • Indentation and Whitespace
    • Strings
    • Booleans
    • Lists
    • Dictionaries
    • Multiline Strings
    • Pure YAML Instead of String Arguments
  • Anatomy of a Playbook
  • Plays
    • Tasks
    • Modules
    • Viewing Ansible Module Documentation
    • Putting It All Together
  • Did Anything Change? Tracking Host State
  • Getting Fancier: TLS Support
    • Generating a TLS Certificate
    • Variables
    • Quoting in Ansible Strings
    • Generating the NGINX Configuration Template
    • Loop
    • Handlers
    • A Few Things to Keep in Mind About Handlers
    • Testing
    • Validation
    • The Playbook
    • Running the Playbook
  • Conclusion
• 4. Inventory: Describing Your Servers
  • Inventory/Hosts Files
    • Preliminaries: Multiple Vagrant Machines
  • Behavioral Inventory Parameters
    • Changing Behavioral Parameter Defaults
  • Groups and Groups and Groups
    • Example: Deploying a Django App
    • Aliases and Ports
    • Groups of Groups
    • Numbered Hosts (Pets Versus Cattle)
  • Hosts and Group Variables: Inside the Inventory
  • Host and Group Variables: In Their Own Files
  • Dynamic Inventory
    • Inventory Plug-ins
    • Amazon EC2
    • Azure Resource Manager
    • The Interface for a Dynamic Inventory Script
      • Showing host details
      • Listing groups
    • Writing a Dynamic Inventory Script
  • Breaking the Inventory into Multiple Files
  • Adding Entries at Runtime with add_host and group_by
    • add_host
    • group_by
  • Conclusion
• 5. Variables and Facts
  • Defining Variables in Playbooks
    • Defining Variables in Separate Files
    • Directory Layout
  • Viewing the Values of Variables
    • Variable Interpolation
  • Registering Variables
  • Facts
    • Viewing All Facts Associated with a Server
    • Viewing a Subset of Facts
    • Any Module Can Return Facts or Info
    • Local Facts
    • Using set_fact to Define a New Variable
  • Built-In Variables
    • hostvars
    • inventory_hostname
    • groups
  • Extra Variables on the Command Line
  • Precedence
  • Conclusion
• 6. Introducing Mezzanine: Our Test Application
  • Why Is Deploying to Production Complicated?
  • Postgres: The Database
  • Gunicorn: The Application Server
  • NGINX: The Web Server
  • Supervisor: The Process Manager
  • Conclusion
• 7. Deploying Mezzanine with Ansible
  • Listing Tasks in a Playbook
  • Organization of Deployed Files
  • Variables and Secret Variables
  • Installing Multiple Packages
  • Adding the Become Clause to a Task
  • Updating the apt Cache
  • Checking Out the Project Using Git
  • Installing Mezzanine and Other Packages into a Virtual Environment
  • Complex Arguments in Tasks: A Brief Digression
  • Configuring the Database
  • Generating the local_settings.py File from a Template
  • Running django-manage Commands
  • Running Custom Python Scripts in the Context of the Application
    • Setting Service Configuration Files
  • Enabling the NGINX Configuration
  • Installing TLS Certificates
  • Installing Twitter Cron Job
  • The Full Playbook
  • Running the Playbook Against a Vagrant Machine
  • Troubleshooting
    • Cannot Check Out Git Repository
    • Cannot Reach 192.168.33.10.nip.io
    • Bad Request (400)
  • Conclusion
• 8. Debugging Ansible Playbooks
  • Humane Error Messages
  • Debugging SSH Issues
  • Common SSH Challenges
    • PasswordAuthentication no
    • SSH as a Different User
    • Host Key Verification Failed
    • Private Networks
  • The debug Module
  • Playbook Debugger
  • The assert Module
  • Checking Your Playbook Before Execution
    • Syntax Check
    • List Hosts
    • List Tasks
    • Check Mode
    • Diff (Show File Changes)
    • Tags
    • Limits
  • Conclusion
• 9. Roles: Scaling Up Your Playbooks
  • Basic Structure of a Role
  • Example: Deploying Mezzanine with Roles
    • Using Roles in Your Playbooks
    • Pre-Tasks and Post-Tasks
    • A database Role for Deploying the Database
    • A mezzanine Role for Deploying Mezzanine
  • Creating Role Files and Directories with ansible-galaxy
  • Dependent Roles
  • Ansible Galaxy
    • Web Interface
    • Command-Line Interface
      • Installing a role
      • Listing installed roles
      • Uninstalling a role
    • Role Requirements in Practice
    • Contributing Your Own Role
  • Conclusion
• 10. Complex Playbooks
  • Dealing with Badly Behaved Commands
  • Filters
    • The default Filter
    • Filters for Registered Variables
    • Filters That Apply to Filepaths
    • Writing Your Own Filter
  • Lookups
    • file
    • pipe
    • env
    • password
    • template
    • csvfile
    • dig
    • redis
    • Writing Your Own Lookup Plug-in
  • More Complicated Loops
    • With Lookup Plug-in
    • with_lines
    • with_fileglob
    • with_dict
    • Looping Constructs as Lookup Plug-ins
  • Loop Controls
    • Setting the Variable Name
    • Labeling the Output
  • Imports and Includes
    • Dynamic Includes
    • Role Includes
    • Role Flow Control
  • Blocks
  • Error Handling with Blocks
  • Encrypting Sensitive Data with ansible-vault
    • Multiple Vaults with Different Passwords
  • Conclusion
• 11. Customizing Hosts, Runs, and Handlers
  • Patterns for Specifying Hosts
  • Limiting Which Hosts Run
  • Running a Task on the Control Machine
  • Manually Gathering Facts
  • Retrieving an IP Address from the Host
  • Running on One Host at a Time
  • Running on a Batch of Hosts at a Time
  • Running Only Once
  • Limiting Which Tasks Run
    • step
    • start-at-task
    • Running Tags
    • Skipping Tags
  • Running Strategies
    • Linear
    • Free
  • Advanced Handlers
    • Handlers in Pre- and Post-Tasks
    • Flush Handlers
    • Meta Commands
    • Handlers Notifying Handlers
    • Handlers Listen
    • The SSL Case for the listen Feature
  • Conclusion
• 12. Managing Windows Hosts
  • Connection to Windows
  • PowerShell
  • Windows Modules
  • Our Java Development Machine
  • Adding a Local User
  • Windows Features
  • Installing Software with Chocolatey
  • Configuration of Java
  • Updating Windows
  • Conclusion
• 13. Ansible and Containers
  • Kubernetes
  • Docker Application Life Cycle
  • Registries
  • Ansible and Docker
  • Connecting to the Docker Daemon
  • Example Application: Ghost
  • Running a Docker Container on Our Local Machine
  • Building an Image from a Dockerfile
  • Pushing Our Image to the Docker Registry
  • Orchestrating Multiple Containers on Our Local Machine
  • Querying Local Images
  • Deploying the Dockerized Application
    • Provisioning MySQL
    • Deploying the Ghost Database
    • Frontend
    • Frontend: Ghost
    • Frontend: NGINX
    • Cleaning Out Containers
  • Conclusion
• 14. Quality Assurance with Molecule
  • Installation and Setup
  • Configuring Molecule Drivers
  • Creating an Ansible Role
  • Scenarios
    • Desired State
    • Configuring Scenarios in Molecule
    • Managing Virtual Machines
    • Managing Containers
  • Molecule Commands
  • Linting
    • YAMLlint
    • ansible-lint
    • ansible-later
  • Verifiers
    • Ansible
    • Goss
    • TestInfra
  • Conclusion
• 15. Collections
  • Installing Collections
  • Listing Collections
  • Using Collections in a Playbook
  • Developing a Collection
  • Conclusion
• 16. Creating Images
  • Creating Images with Packer
    • Vagrant VirtualBox VM
    • Combining Packer and Vagrant
    • Cloud Images
    • Google Cloud Platform
    • Azure
    • Amazon EC2
    • The Playbook
  • Docker Image: GCC 11
  • Conclusion
• 17. Cloud Infrastructure
  • Terminology
    • Instance
    • Amazon Machine Image
    • Tags
  • Specifying Credentials
    • Environment Variables
    • Configuration Files
  • Prerequisite: Boto3 Python Library
  • Dynamic Inventory
    • Inventory Caching
    • Other Configuration Options
  • Defining Dynamic Groups with Tags
    • Applying Tags to Existing Resources
    • Nicer Group Names
  • Virtual Private Clouds
  • Configuring ansible.cfg for Use with ec2
  • Launching New Instances
  • EC2 Key Pairs
    • Creating a New Key
    • Uploading Your Public Key
  • Security Groups
    • Permitted IP Addresses
    • Security Group Ports
  • Getting the Latest AMI
  • Create a New Instance and Add It to a Group
  • Waiting for the Server to Come Up
  • Putting It All Together
  • Specifying a Virtual Private Cloud
    • Dynamic Inventory and VPC
  • Conclusion
• 18. Callback Plug-ins
  • Stdout Plug-ins
    • ARA
    • debug
    • default
    • dense
    • json
    • minimal
    • null
    • oneline
  • Notification and Aggregate Plug-ins
    • Python Requirements
    • foreman
    • jabber
    • junit
    • log_plays
    • logentries
    • logstash
    • mail
    • profile_roles
    • profile_tasks
    • say
    • slack
    • splunk
    • timer
  • Conclusion
• 19. Custom Modules
  • Example: Checking That You Can Reach a Remote Server
    • Using the Script Module Instead of Writing Your Own
    • can_reach as a Module
  • Should You Develop a Module?
  • Where to Put Your Custom Modules
  • How Ansible Invokes Modules
    • Generate a Standalone Python Script with the Arguments (Python Only)
    • Copy the Module to the Host
    • Create an Arguments File on the Host (Non-Python Only)
    • Invoke the Module
  • Expected Outputs
    • Output Variables That Ansible Expects
      • changed
      • failed
      • msg
  • Implementing Modules in Python
    • Parsing Arguments
    • Accessing Parameters
    • Importing the AnsibleModule Helper Class
    • Argument Options
      • required
      • default
      • choices
      • aliases
      • type
    • AnsibleModule Initializer Parameters
      • argument_spec
      • no_log
      • check_invalid_arguments
      • mutually_exclusive
      • required_one_of
      • add_file_common_args
      • bypass_checks
    • Returning Success or Failure
    • Invoking External Commands
    • Check Mode (Dry Run)
  • Documenting Your Module
  • Debugging Your Module
  • Implementing the Module in Bash
  • Specifying an Alternative Location for Bash
  • Conclusion
• 20. Making Ansible Go Even Faster
  • SSH Multiplexing and ControlPersist
    • Manually Enabling SSH Multiplexing
    • SSH Multiplexing Options in Ansible
  • More SSH Tuning
    • Algorithm Recommendations
  • Pipelining
    • Enabling Pipelining
    • Configuring Hosts for Pipelining
  • Mitogen for Ansible
  • Fact Caching
    • JSON File Fact-Caching Backend
    • Redis Fact-Caching Backend
    • Memcached Fact-Caching Backend
  • Parallelism
  • Concurrent Tasks with Async
  • Conclusion
• 21. Networking and Security
  • Network Management
    • Supported Vendors
    • Ansible Connection for Network Automation
    • Privileged Mode
    • Network Inventory
    • Network Automation Use Cases
  • Security
    • Comply with Compliance?
    • Secured, but Not Secure
    • Shadow IT
    • Sunshine IT
    • Zero Trust
  • Conclusion
• 22. CI/CD and Ansible
  • Continuous Integration
    • Elements in a CI System
      • Artifact repository
      • Gitea
      • Code quality
      • CI server
      • Jenkins
    • Jenkins and Ansible
      • Jenkins configuration as code
      • Jenkins job configurations as code
    • Running CI for Ansible Roles
  • Staging
  • Ansible Plug-in
  • Ansible Tower Plug-in
  • Conclusion
• 23. Ansible Automation Platform
  • Subscription Models
    • Ansible Automation Platform Trial
  • What Ansible Automation Platform Solves
    • Access Control
    • Projects
    • Inventory Management
    • Run Jobs by Job Templates
  • RESTful API
  • AWX.AWX
    • Installation
    • Create an Organization
    • Create an Inventory
    • Running a Playbook with a Job Template
  • Using Containers to Run Ansible
    • Creating Execution Environments
  • Conclusion
• 24. Best Practices
  • Simplicity, Modularity, and Composability
  • Organize Content
  • Decouple Inventories from Projects
  • Decouple Roles and Collections
  • Playbooks
  • Code Style
  • Tag and Test All the Things
  • Desired State
  • Deliver Continuously
  • Security
  • Deployment
  • Performance Indicators
  • Benchmark Evidence
  • Final Words
• Bibliography
• Index