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  • Book Overview & Buying Mastering SaltStack
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Mastering SaltStack

Mastering SaltStack - Second Edition

By : Joseph Hall
4.6 (5)
Buy this Book
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Mastering SaltStack

Mastering SaltStack

4.6 (5)
By: Joseph Hall
Buy this Book

Overview of this book

SaltStack is a powerful configuration management and automation suite designed to manage servers and tens of thousands of nodes. This book showcases Salt as a very powerful automation framework. We will review the fundamental concepts to get you in the right frame of mind, and then explore Salt in much greater depth. You will explore Salt SSH as a powerful tool and take Salt Cloud to the next level. Next, you’ll master using Salt services with ease in your infrastructure. You will discover methods and strategies to scale your infrastructure properly. You will also learn how to use Salt as a powerful monitoring tool. By the end of this book, you will have learned troubleshooting tips and best practices to make the entire process of using Salt pain-free and easy.
Table of Contents (14 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. Essentials Revisited
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1. Essentials Revisited
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Executing commands remotely
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SLS file trees
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Using states for configuration management
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The basics of grains, pillars, and templates
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Summary
2
2. Diving into Salt Internals
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2. Diving into Salt Internals
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Understanding the Salt configuration
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The renderer
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Understanding the loader
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Plunging into the state compiler
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Summary
3
3. Managing States
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3. Managing States
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Handling multiple states
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Spanning multiple environments
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Understanding master_tops
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Using Salt Stack Formulas on GitHub
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Using the Salt Package Manager
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Summary
4
4. Exploring Salt SSH
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4. Exploring Salt SSH
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Grappling with SSH
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Using rosters
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Understanding the salt-thin agent
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Using the raw SSH mode
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Summary
5
5. Managing Tasks Asynchronously
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5. Managing Tasks Asynchronously
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Looking at the event system
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Building reactors
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Using Thorium
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Using the queue system
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Summary
6
6. Taking Advantage of Salt Information Systems
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6. Taking Advantage of Salt Information Systems
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Understanding pillar_roots
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Using Salt's external pillars
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Understanding SDB
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Comparing pillars and SDB
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Summary
7
7. Taking Salt Cloud to the Next Level
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7. Taking Salt Cloud to the Next Level
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Examining the Salt Cloud configuration
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Using SDB with Salt Cloud
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Building custom deploy scripts
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Taking a look at cloud maps
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Using reactors with Salt Cloud
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Working with autoscale reactors
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Summary
8
8. Using Salt with REST
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8. Using Salt with REST
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Looking at Salt's HTTP library
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Understanding the Salt API
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Working with webhooks
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Summary
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9. Understanding the RAET and TCP Transports
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9. Understanding the RAET and TCP Transports
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Comparing RAET and ZeroMQ
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Flow-based programming
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Driving with RAET
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Looking at asynchronous programming
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Examining the TCP transport
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Using the TCP transport
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Summary
10
10. Strategies for Scaling
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10. Strategies for Scaling
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All about syndication
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High availability with multiple masters
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Incorporating external data sources
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Using the master API
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Testing the load in the infrastructure
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Summary
11
11. Monitoring with Salt
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11. Monitoring with Salt
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Monitoring basics
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Monitoring with returners
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Using monitoring states
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Working with beacons
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Setting up alerts
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Using aggregate data with Thorium
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Summary
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12. Exploring Best Practices
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12. Exploring Best Practices
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Future-proofing your infrastructure
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Setting up your directories
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The SLS efficiency
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Naming conventions
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Templates and variables
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Summary
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13. Troubleshooting Problems
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13. Troubleshooting Problems
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What the...?
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Using salt-call locally
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Working with YAML
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Asking the community for help
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Summary

Using Thorium

The Thorium system is another component of Salt with the ability to watch the event bus and react based on what it sees there. But the ideas behind it are much different than with the reactor.

A word on engines

Thorium is one of the engines that started shipping with Salt in version 2016.3. Engines are a type of long-running process that can be written to work with the master or minion. Like other module types, they have access to the Salt configuration and certain Salt subsystems.

Engines are separate processes that are managed by Salt. The event reactor runs inside the Salt processes themselves, which means that long-running reactor operations can affect the rest of Salt. Because Thorium is an engine, it does not suffer from this limitation.

Looking at Thorium basics

Like the reactor, Thorium watches the event bus. But unlike the reactor, which is configured entirely via SLS files, Thorium uses its own subsystem of modules (which are written in Python) and SLS files. Because these...

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Mastering SaltStack
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