In my puppet config I need to lowercase a variable value before using it in a template. How to achieve this? Is there a way to lowercase a variable value inside the puppet manifest? Do I need to do this in the template?
And more general: where are string manipulation functions that I could use in manifests.
Do I have to write my own custom ruby functions to achieve this?
There are two general solutions I can think of for this problem. By general, I mean they'll work in manifest files and templates instead of just templates.
The solution I recommend is to use the downcase() parser function in the standard library module. I recommend this because you don't need to write any ruby code and it's easier to read:
class helloworld {
$os_downcase = downcase($osfamily)
}
include helloworld
If you don't want to depend on the stdlib module, then you can use the inline_template function to generalize the solution Shane mentioned:
class helloworld {
$os_downcase = inline_template('<%= osfamily.downcase %>')
}
include helloworld
inline_template avoids the need to create a separate *.erb file.
Hope this helps. -Jeff
Puppet's string manipulation capabilities inside manifests are very limited. Manifests aren't really intended to handle stuff like this.
But, in the template, it's easy; normal ruby functions are available. Say I wanted a lowercase of the osfamily fact:
<%= osfamily.downcase %>
