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  • Book Overview & Buying Learning SaltStack
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Learning SaltStack

Learning SaltStack

By : Colton Myers
4.3 (18)
Buy this Book
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Learning SaltStack

Learning SaltStack

4.3 (18)
By: Colton Myers
Buy this Book

Overview of this book

If you are a system administrator who manages multiple servers, then you know how difficult it is to keep your infrastructure in line. If you've been searching for an easier way, this book is for you. No prior experience with SaltStack is required.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Diving In – Our First Salt Commands
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1. Diving In – Our First Salt Commands
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Introducing Salt
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Installing Salt
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Configuring Salt
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A game of ping pong
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Masterless Salt
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Summary
2
2. Controlling Your Minions with Remote Execution
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2. Controlling Your Minions with Remote Execution
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The structure of a remote execution command
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Summary
3
3. Execution Modules – Write Your Own Solution
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3. Execution Modules – Write Your Own Solution
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Exploring the source
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An advanced example
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Summary
4
4. Defining the State of Your Infrastructure
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4. Defining the State of Your Infrastructure
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Our first state
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The pieces of a state declaration
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Expanding to encompass multiple pieces of state
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Dependencies using requisites
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Summary
5
5. Expanding Our States with Jinja2 and Pillar
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5. Expanding Our States with Jinja2 and Pillar
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Adding a new minion
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Jinja2
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Defining secure minion-specific data in pillar
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Summary
6
6. The Highstate and Environments
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6. The Highstate and Environments
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The highstate
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Storing our states in Git with GitFS
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Summary
7
7. Using Salt Cloud to Manage Virtual Minions
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7. Using Salt Cloud to Manage Virtual Minions
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Setting up Salt Cloud
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Managing groups of VMs with map files
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Summary
8
8. The Reactor and the Event System
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8. The Reactor and the Event System
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The Salt event system
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Reacting to events
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Summary
9
Index
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Index

An advanced example

Remote execution modules are endlessly flexible. The tools are there, and you can write whatever you need to extend Salt to handle your infrastructure.

However, we're not going to try to explore every possible need your infrastructure might have as that is impossible to do in the space allotted. Every environment is different, and we have explored the available tools well enough for you to be able to tackle those hurdles on your own.

Instead, we will explore a more complicated example of a remote execution module function from beginning to end and walk through the code.

The example that we will use is file.replace. This remote execution function is designed to replace text in a file based on a pattern. We can set arguments such that if a match is not found, it will prepend or append the text to the file. Here's a full list of arguments in the function declaration:

def replace(path,
            pattern,
            repl,
            count=0,
            flags=0...
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Learning SaltStack
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