Ruby can't 'put', gives error 'Unknown function puts'

Question

First off, I'm a ruby noob and I'm in a bit over my head, please be gentile.

I'm getting an exception on line 14 of this file, (written by someone else).

https://github.com/theforeman/kafo/blob/master/modules/kafo_configure/manifests/yaml_to_class.pp

 if is_hash($kafo_configure::params[$name]) { # The quotes around $classname seem to matter to puppet's parser... $params = { "${classname}" => $kafo_configure::params[$name] } create_resources( 'class', $params )

I need to adding a debugging to determine why the 'create_resources' function call is crashing.

exception object expected at /usr/local/var/rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems\ /kafo-0.6.0/modules/kafo_configure/manifests/yaml_to_class.pp:14 on node foo.bar

When I try and print out the value of $name, I encounter an error that 'puts' is an unknown function.

 if is_hash($kafo_configure::params[$name]) { puts "debugging name is #{name}" # The quotes around $classname seem to matter to puppet's parser... $params = { "${classname}" => $kafo_configure::params[$name] } create_resources( 'class', $params )

I've also tried the following syntaxes:

 puts "debugging name is #{name}" print "debugging name is #{name}" puts "debugging name is $name" print "debugging name is $name" puts "debugging name is #{$name}"

Can anyone explain:
1. Why this function is unable to print/put ?
2. Is there another way to show what the value of that $name variable is?

Update

As pointed out, I've also used this syntax puts "debugging name is #{$name}"

I don't see it from that 4 lines. Add to them then, to avoid misunderstanding. — Alexander Kireyev
– Alexander Kireyev, Commented May 29, 2014 at 1:04
This is not Ruby — it looks like Perl. Er, correction, from looking at the file, it looks like it's Puppet's manifest language. At any rate, not Ruby. — Chuck
– Chuck, Commented May 29, 2014 at 1:10
It's not Perl. It's the Puppet DSL. Ruby is a no go there. you can use something like $foo = inline_template("<%= puts 'foo' %>"). I don't remember what log file this would write to though. — ptierno
– ptierno, Commented Jun 1, 2014 at 5:26
@Chuck: Sorry, just realized you noticed it was Puppet. My bad :) — ptierno
– ptierno, Commented Jun 1, 2014 at 5:27

Emyl · Accepted Answer · 2014-05-29 11:22:35Z

You can use the notice function for printing debugging messages.

The fail function you've pointed out will print the message, but will also break the manifest execution.

spuder · Accepted Answer · 2014-05-29 01:34:56Z

Figured it out. Since puppet is written in ruby, I mistakenly assumed that I could use ruby inside of the puppet file.

I was able to print out the debuging statement I needed using puppet's built in 'fail' function

fail("if the value of name is ${name}")

Working solution

if is_hash($kafo_configure::params[$name]) { # The quotes around $classname seem to matter to puppet's parser... fail("if the value of name is ${name}") $params = { "${classname}" => $kafo_configure::params[$name] } create_resources( 'class', $params )

Since puppet is written in ruby, I mistakenly assumed that I could use ruby inside of the puppet file. Normally, that would not be a mistake.

Felix Frank · Accepted Answer · 2014-05-30 10:34:09Z

1

To make debug messages visible on the agent side, you can employ the notify { } resource type.

answered May 30, 2014 at 10:34

Felix Frank

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