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Salt Cookbook

Salt Cookbook

By : Anirban Saha
3.5 (2)
Buy this Book
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Salt Cookbook

Salt Cookbook

3.5 (2)
By: Anirban Saha
Buy this Book

Overview of this book

If you are a professional associated with system and infrastructure management, looking at automated infrastructure and deployments, then this book is for you. No prior experience of Salt is required.
Table of Contents (13 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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Sections
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Salt Architecture and Components
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1. Salt Architecture and Components
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Introduction
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Installing and configuring the Salt master
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Configuring the Salt environment and pillar paths
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Understanding and configuring Salt pillars
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Understanding and writing Salt states
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Understanding and writing the top file
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Installing and configuring the Salt minion
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Configuring environments and grains on the minion
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Applying Salt states to minions
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2. Writing Advanced Salt Configurations
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2. Writing Advanced Salt Configurations
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Introduction
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Writing and retrieving pillar data
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Using pillar data in states
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Using grains in states
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Using conditionals in states and pillars
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Using Python functions in conditionals
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Using iterations in states
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Setting and using variables in states
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Testing a state run before applying to minions
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Configuring nodegroups
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Targeting minions
3
3. Modules, Orchestration, and Scaling Salt
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3. Modules, Orchestration, and Scaling Salt
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Introduction
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Using execution modules
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Using state modules
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Configuring templates
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Using requisites
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Using Salt runners
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Orchestration with Salt orchestrate
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Salt multi-master setup (active-active mode)
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Salt multi-master setup (active-passive mode)
4
4. General Administration Tasks
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4. General Administration Tasks
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Introduction
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Running commands
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Setting host entries and grains
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Setting time zone, locale, and kernel configurations
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Handling archive files
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Adding groups and users
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Performing SSH authentication tasks
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Scheduling jobs with cron
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Managing volumes
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Working with disks and mounts
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Managing network configurations
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5. Advanced Administration Tasks
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5. Advanced Administration Tasks
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Introduction
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Managing package repositories
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Managing packages using the default package manager
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Managing packages using rvm, gem, and pip
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Managing files
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Managing services
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Managing code repositories with Git
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Managing code repositories with svn
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Configuring alternatives
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6. Managing Application Servers
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6. Managing Application Servers
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Introduction
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Apache web server packages and services
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Managing web server modules
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Adding web server configuration
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Web server security with htpasswd
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Setting up Java for Apache Tomcat
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Apache Tomcat packages, files, and services
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Deploying the WAR file in Apache Tomcat
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7. Managing Databases
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7. Managing Databases
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Introduction
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Using MySQL packages, files, and services
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Using MySQL databases
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Creating MySQL database users
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Running MySQL queries
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Providing MySQL user grants
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Using PostgreSQL packages, files, and services
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Setting up PostgreSQL groups and users
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Configuring PostgreSQL databases
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8. Configuring Salt Cloud
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8. Configuring Salt Cloud
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Introduction
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Configuring the Salt cloud environment
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Configuring cloud providers
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Configuring cloud profiles
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Extending profiles and providers
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Configuring cloud maps
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Using post-install scripts
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Launching, querying, and destroying instances
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Performing general cloud functions
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9. Managing Amazon Web Services
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9. Managing Amazon Web Services
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Introduction
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Implementing security groups
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Using elastic load balancers
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Configuring DNS with Route53
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Configuring Simple Queue Service
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Deploying ElastiCache clusters
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Configuring CloudWatch alarms
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10. Salt Event and Reactor System
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10. Salt Event and Reactor System
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Introduction
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Learning the basics of the event system
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Listening to events
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Firing events
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Identifying and working with Salt event types
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Integrating and configuring the reactor system
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Using reactors for Salt tasks
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11. Troubleshooting
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11. Troubleshooting
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Introduction
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Troubleshooting the Salt master
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Troubleshooting the Salt minion
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Dealing with too many open files
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Connectivity, DNS, and ports
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Dealing with YAML configuration problems
12
Index
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Index

Using requisites

In infrastructure management, almost all the time, we have situations where we need a task to happen only if another condition is true. This is achieved by creating dependencies between definitions. In Salt, these dependencies are known as requisites, and in this recipe, you will learn about how to use them.

How to do it...

We will use the same minion as the previous recipe.

  1. Create a new state called ntp by creating a directory called ntp in the base directory of the staging environment, and then create a directory called files in the ntp state directory.
  2. Create a file called init.sls in the ntp state directory and edit it to have the following entries:
    ntp_package:
  pkg.installed:
    - name: ntp

ntp_conf_file:
  file.managed:patch antenna circular polarization
    - name: /etc/ntp.conf
    - source: salt://ntp/files/ntp.conf
    - user: root
    - group: root
    - mode: 644
    - require:
      - pkg: ntp_package

ntp_service:
  service:
    - name: ntpd
    - running
...

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