Writing Puppet Classes - Using Puppet to Perform Configuration ... - Oracle For example, here is the sample "if" statement from the Puppet documentation: In this statement, the . This include function declares a class without explicitly setting any parameters, allowing any parameters in the class to use their default values. A class definition contains the code for a specific class. For information on the classes and types, see the REFERENCE.md. Video Script. A common issue with Puppet manifests is a clash of resource definitions that appears in the Puppet log file as: 'Duplicate definition: File[resource-name] is already defined; cannot redefine at…' This issue is likely to occur when building a service stack from reusable Puppet modules and you try to alter a . class apache { class { 'apache::service': } class { 'apache::package': } class { 'apache::config': }} A class declaration is a class that is defined within a manifest. Chapter 3. Adding Puppet Modules to Red Hat Satellite 6 Reference. . Hiera allows hierarchical configuration in Puppet, which is difficult to achieve with native Puppet code. Puppet Module Design. Preferring the include keyword. This way we can define facts in whichever classes we want, but all the logic is encapsulated inside the mcollective module. Passing parameters to classes Sometimes it's very useful to parameterize some aspect of a class. Puppet Classes - javatpoint 4. Puppet Module Design - Puppet Best Practices [Book] node default {include stdlib class {java: stage => 'runtime'}} The stdlib::manage class provides an interface for generating trivial resource declarations via the create_resources parameter. Puppet Class: apache::mod::status - PuppetModule.info The syntax is very similar to most other languages. Puppet Programming Constructs & Classes :: CIS 527 Textbook