Unable to access hash elements directly from templates

[Josh]

I am using puppet version 6.2 (the one that comes with squeeze) in case it makes a difference.

I am new to puppet and am having a problem getting access to the elements of a hash in my erb templates and no matter what I google for I cannot seem to find out what I am doing wrong. 

I have stripped everything back to example code to rule out other things, in reality I have split my files up a but to avoid the monolithic init.pp and nodes.pp. Anyway...

my nodes.pp has this in it:

node 'pc01.domain.com' {

  # Test code

  $myhash = { 

    key => { 

      subkey1 => 'foo',

      subkey2 => 'bar'

    }

  }

  include mymodule

}

Then in the modules init.pp I have:

class mymodule {

  # Test code

  notice($myhash[key][subkey1])

  notice($myhash[key][subkey2])

  file { "/tmp/test":

    ensure => present,

    content => template("mymodule/test.erb"),

  }

}

If I run puppet against this the two notice lines work fine so I have access to the data within the module, the problem is getting it into the template. I tried a few different syntaxes to no effect:

So first I tried a template like so:

TEST: <%= $myhash[key][subkey1] %>

This gave me the error:

err: Could not retrieve catalog from remote server: Error 400 on SERVER: Failed to parse template mymodule/test.erb: Could not find value for 'key' at /etc/puppet/modules/mymodule/manifests/init.pp:7 on node pc01.domain.com

If I quote the string in the template (i.e. "<%= $myhash[key][subkey1] %>") then it just spits out that string into the file rather than interpreting the data.

I have similar errors if I try to use scope.lookupvar to explicitly specify where things are too.

So, what am I doing wrong or is it just not possible to pick a single hash element and put it into a template.

Thanks

Josh

p.s. my Ruby sucks so if I have to go down that route it'll need to be a noddy explanation

[Gary Larizza]

Hey Josh,

Don't use the $ for variables in Templates - Puppet variables and arrays are accessed as local variables/arrays in templates.  So try this:  TEST: <%= myhash[key][subkey1] %>

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[Josh]

On Wednesday, 11 April 2012 17:14:10 UTC+1, Gary Larizza wrote:

Don't use the $ for variables in Templates - Puppet variables and arrays are accessed as local variables/arrays in templates.  So try this:  TEST: <%= myhash[key][subkey1] %>

Ah, I did try that before. I get the error:

err: Could not retrieve catalog from remote server: Error 400 on SERVER: Failed to parse template mymodule/test.erb: Could not find value for 'key' at /etc/puppet/modules/mymodule/manifests/config.pp:22 on node pc01.domain.com

Thanks

Josh

[Josh]

Sorry, that should be:

err: Could not retrieve catalog from remote server: Error 400 on SERVER: Failed to parse template mymodule/test.erb: Could not find value for 'key' at /etc/puppet/modules/mymodule/manifests/init.pp:7 on node pc01.domain.com

(i.e. it errors on the content => ... line)

Josh

[Josh]

Eventually I worked this out (nothing like trying every possible combination eh), solution was to remove the $ at the start as you said and also quote the keys in single quotes like so:

TEST: <%= myhash['key']['subkey1'] %>

Thanks again for your help

Josh