Puppet Templates

 • Templates are documents that combine code, data, and literal text to produce a final rendered output

• The goal of a template is to manage a complicated piece of text with simple inputs

• In Puppet, you’ll usually use templates to manage the content of configuration files


Templating Language

• Templates are written in a templating language, which is specialized for generating text from data

• Puppet supports two templating languages:

• Embedded Puppet (EPP) uses Puppet expressions in special tags

• It’s easy for any Puppet user to read, but only works with newer Puppet versions

• Embedded Ruby (ERB) uses Ruby code in tags

• You need to know a small bit of Ruby to read it, but it works with all Puppet versions


With Template

• You can put template files in the templates directory of a module

• EPP files should have the .epp extension, and ERB files should have the .erb extension 

# epp(<FILE REFERENCE>, [<PARAMETER HASH>]) 

file { '/etc/ntp.conf': ensure => file, content => epp('ntp/ntp.conf.epp', {'service_name' => 'xntpd', 'iburst_enable' => true}), # Loads

 /etc/puppetlabs/code/environments/production/modules/ntp/templates/ntp.conf.epp } # template(<FILE REFERENCE>, [<ADDITIONAL FILES>, ...]) 

file { '/etc/ntp.conf': ensure => file, content => template('ntp/ntp.conf.erb'), # Loads /etc/puppetlabs/code/environments/production/modules/ntp/templates/ntp.conf.erb }

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