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What can I do with erb templates in Puppet?

asked 2013-01-17 13:07:12 -0500

ramindk gravatar image

Most of the examples of templates in Puppet are quite simple. What are some interesting or complex uses of template that Puppet users find useful.

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answered 2013-01-17 13:30:05 -0500

ramindk gravatar image

Puppet uses Ruby erb template which are quite powerful. Text between <% %> is executed as Ruby code. Text between <%= %> will be interpolated as a variable.

This would write the operating system fact to a file

<%= @operatingsystem %>

This would do it twice with on a new line at the end because of the -%> in the first instance.

<%= @operatingsystem -%> <%= @operatingsystem %>

If the value you want is not a fact or local variable, you'll need to look it up like this.

<%= scope.lookupvar('rvm::data::ruby_version') %>

You can of course manipulate the data in each. Keep in mind that all facts are strings ... (more)

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Asked: 2013-01-17 13:07:12 -0500

Seen: 14,491 times

Last updated: Jan 17 '13