Introduction

Puppet implementations have developed in tandem with DevOps developments. Puppet is, basically, one of the first configuration management systems, and as a result, it has a sizable user and support base. When it is about configuring, installing, maintaining, and controlling, a device or a computer, Puppet is a powerful tool. Through this Puppet Tutorial, we’ll learn more.

  1. What is Puppet?
  2. Why do we use Puppet?
  3. Understanding the Puppet Components and Puppet Architecture
  4. How does Puppet work?
  5. Installation and Configuration on Linux
  6. Understanding Puppet Modules

1. What is Puppet?

Before we get into Puppet in this Puppet Tutorial, we’ll need to understand what configuration management is. Configuration management refers to a collection of rules for keeping track of a system’s current build status and architecture and methodologies to know. Puppet is a configuration management tool that is prevalent in both enterprise and open-source versions.

2. Why do we use Puppet?

Currently, one of the most widely used configuration management systems in the IT world is Puppet. Fortune 500 firms are also making heavy use of it. The majority of companies that use methodologies based on DevOps are gravitating toward Puppet.

For example, we can use Puppet to control the following platforms:

  • Debian/Ubuntu
  • Microsoft Windows
  • Red Hat/CentOS/Fedora
  • MacOS X

That clarifies the issue of “What is Puppet in DevOps?”

3. Understanding the Puppet Components and Puppet Architecture

Puppet uses a client-server architecture, with the client being referred to as a Puppet agent.

 The server is referred to as a Puppet master. The elements of the Puppet architecture are as follows:

  • Puppet master
  • Puppet agent
  • Config repository
  • Facts
  • Catalog
  • Manifests
  • Modules
  • Classes
  • Resources
  • Nodes

Puppet has more comprehensive documentation. Puppet, unlike other configuration management systems, verifies configurations at regular intervals after they’ve been deployed on a device. These intervals can also be modified. Puppet is used by some of the industry’s biggest names, including Google, Red Hat, and others. Puppet enables DevOps and System Administrators to function more efficiently and effectively.

4. How does Puppet work?

Puppet, generally, has a quick but effective workflow. Puppet master stores all information related to configuration for the various nodes it manages through Puppet manifests.

In this Puppet Tutorial, we’ll go through the Puppet workflow one step at a time:

  • Puppet agents are installed on the nodes that are managed by Puppet master.
  • Puppet master compiles a catalog based on how the nodes should be configured after gathering all of the details.
  • Each agent makes appropriate configuration changes on their nodes using the information contained in them, then reverts to Puppet master.
  • If necessary, Puppet master may exchange reports with a third-party tool.
  • The Connection between Puppet Agent Nodes and Puppet Master Server 

Puppet agent and Puppet master communicate via HTTPS with verification of the client. When the Puppet agent needs to send a request Puppet master, it simply sends an HTTPS request to one of the endpoints mentioned in the Puppet master’s HTTP interface.

5. Installation and Configuration on Linux

  • Installation

To install Puppet on RHEL, we’ll use a series of Puppet script one by one.

Step 1: Activating Puppet’s package repository

Step 2: Puppet master upgrade

Step 3: Installing the agent nodes

Step 4: Updating the Puppet agent

  • Puppet Configurations

Step 1: Making a certificate for a Puppet master

Ascertain that our platform has a key name for Puppet services and that DNS resolves it to the Puppet master. Make a list of comma-separated hostnames that the master is permitted to use in the ‘main’ section of the master’s puppet.conf file and set those as the values of ‘dns alt names’.

Step 2: Starting and activating the Puppet master service

Step 3: Configuring the agent node

Step 4: Starting the Puppet agent service

Step 5: For the Puppet agent node, create a signing order

Step 6: Starting and activating the Puppet agent

Step 7: Verifying certificates

6. Understanding Puppet Modules

All of our Puppet code is held in modules. Each module in our infrastructure has a particular role, such as downloading and configuring a piece of software. Puppet modules allow you to break your code into several manifests. The best practice for organizing manifest files in Puppet is to use modules. Another advantage of using modules is that code can be shared. We can include any model from anywhere and drop it into the module path since modules are self-contained.

Puppet and Puppet Enterprise, open-source IT automation tools, have large communities. The people in these groups write and create the pre-existing Puppet modules. The pre-existing modules can be written by anyone. These modules are open source and free to download, install, and use. There are currently over 5,000 pre-existing Puppet modules available for use by anyone.

Conclusion

Our Puppet Tutorial is now complete. Puppet is on its way to being the de facto configuration management standard. System Administrators can now perform all of the activities that were previously deemed boring with Puppet. System administrators no longer have to worry about tasks like maintaining, running, checking, and implementing improvements in software, regardless of where it runs, since Puppet, a DevOps tool, has come to the rescue! We hope this Puppet Tutorial was a help to you. The next tutorial will be Puppet automation tutorial.

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