What are classes in Puppet?
What are classes in Puppet?
Classes are named blocks of Puppet code that are stored in modules and applied later when they are invoked by name. You can add classes to a node’s catalog by either declaring them in your manifests or assigning them from an external node classifier (ENC).
What is the benefit of grouping resources into classes when using Puppet?
In Puppet, classes are code blocks that can be called in a code elsewhere. Using classes allows you reuse Puppet code, and can make reading manifests easier.
How do you create a class in Puppet?
Create a class by writing a class definition in a manifest ( . pp ) file. Store class manifests in the manifests/ directory of a module. Define only one class in a manifest, and give the manifest file the same name as the class.
Where are Puppet classes stored?
manifests/ directory
Puppet is automatically aware of any classes in a valid module and can autoload them by name. Classes should be stored in the manifests/ directory of a module with one class per file, and each filename should reflect the name of its class; see Module Fundamentals for more details.
How do you call a class in Puppet?
Basically: You want to put your class/module structured code within Puppet’s module path ( puppet config print modulepath ) then you want to use another manifest file (. pp) to include your class. Your class sshd(){ } code goes in the init.
What are Puppet manifests?
A manifest is a file containing Puppet configuration language that describes how resources should be configured. The manifest is the closest thing to what one might consider a Puppet program. It declares resources that define state to be enforced on a node.
Is Ruby a Puppet?
Puppet is produced by Puppet, Inc, founded by Luke Kanies in 2005. Puppet’s primary product, Puppet Enterprise, is a commercially supported version of its open-source product. Puppet itself is written in Ruby, while Facter is written in C++, and Puppet Server and Puppet DB are written in Clojure.
What is init PP in Puppet?
The init. pp manifest is the main class of a module and, unlike other classes or defined types, it is referred to only by the name of the module itself. For example, the class in init. pp in the puppetlabs-motd module is the mot d class. The manifest file name, without the extension.
What is Puppet node?
A node definition, also known as a node statement, is a block of Puppet code that is included only in matching nodes’ catalogs. This allows you to assign specific configurations to specific nodes. Puppet code that is outside any node definition is compiled for every node.
What is hiera in Puppet?
Hiera is a built-in key-value configuration data lookup system, used for separating data from Puppet code. About Hiera. Puppet’s strength is in reusable code. Code that serves many needs must be configurable: put site-specific information in external configuration data files, rather than in the code itself.
What Puppet means?
1a : a small-scale figure (as of a person or animal) usually with a cloth body and hollow head that fits over and is moved by the hand. b : marionette. 2 : doll sense 1. 3 : one whose acts are controlled by an outside force or influence a puppet ruler.
Can puppet manage workstations?
Yes, you can use Puppet Enterprise to manage Windows workstations. A quick search shows that there are almost 100 modules that list Windows compatibility on the Puppet Forge that you can use to make it easier to manage Windows.
How are classes assigned to nodes in puppet?
Assign classes to node groups. Nodes can match the rules of many node groups. They receive classes, class parameters, and variables from all the node groups that they match. Node groups exist in a hierarchy of parent and child relationships. Nodes inherit classes, class parameters and variables, and rules from all ancestor groups.
What are the two types of conditions in puppet?
Conditions are situations when the user wishes to execute a set of statement or code when the defined condition or the required condition is satisfied. Puppet supports two types of conditions. The selector condition which can only be used within the defined resources to pick the correct value of the machine.
How does the OOP concept work in puppet?
In Puppet, the OOP concept of inheritance is supported by default wherein classes can extend the functionality of previous without copying and pasting the complete code bit again in newly created class. Inheritance allows the subclass to override the resource settings defined in the parent class.
What is the concept of aggregation in puppet?
Puppet supports a very powerful concept of aggregation. In Puppet, aggregation is used for grouping resource which is the fundamental unit of Puppet together. This concept of aggregation in Puppet is achieved by using two powerful methods known as classes and definition. Classes are responsible for modeling the fundamental aspects of node.