Chapter 2. Building Puppet Modules from Scratch One key point to remember in Puppet is, classes with parameters are not added using the include function, rather the resulting class can be added as a definition. Puppet Beginner's Guide — Bitfield Consulting Parameter data types | Puppet 5 Beginner's Guide - Packt Typically, parameters are some kind of configuration information that is provided to the class when it is instantiated. Parameterized Classes (and Interfaces) - JMU Metaparameters are known as global parameters in Puppet. Validations: Must be a String The parameters of the class are listed in angle brackets. Click on the foreman class, and you should get a page with 3 tabs, like so: The midddle tab, "Smart Class Parameter", is the important one. Validations: Must be a String. If you include a data type, Puppet checks the resource parameter's value at runtime to make sure that it has the right data type; if the value is illegal, Puppet raises an error. parameter_type. This won't use any facts, and won't know how to compile . Passing parameters to classes Sometimes it's very useful to parameterize some aspect of a class. it {is_expected. password. Manual - Foreman Previously, this was not allowed because Puppet 4 parameter types can be automatically determined without extra documentation. String Integer, Float, and Numeric Boolean Array Hash Regexp Timespan and Timestamp Undef Default Resource and class references Puppet is a system management tool for centralizing and automating the configuration management process. Uploading modules to the Puppet Forge.