Virtual resources ?

[Jakov Sosic]

Hi guys,

I have a `test.pp` manifest that looks like:


```
define basket($arg) {
file { "/tmp/$name":
ensure => present,
content => $arg,
}
}

foobar = {
'fruit' => { arg => 'apple' },
'berry' => { arg => 'watermelon' }
}

@basket[$foobar]

realize( Basket[fruit] )
realize( Basket[berry] )
```


When I run `puppet apply test.pp`, this is what I get:

Error: Could not parse for environment production: Virtual (@) can only
be applied to a Resource Expression at /tmp/pero.pp:16:1 on node workstation


Any ideas?

[Martin Alfke]

Hi,

You are passing a Hash as an parameter to a define.
Inside the define you expect the parameter to be of type String - according to what you do in the define.

You need to take care of splitting data accordingly in your define:
With Puppet 4 this is very easy to achieve:

define basket (
Hash $arg,
){
$arg.each |String $key, Hash $value| {
file { “/tmp/${key}”:
ensure => file,
content => $value[‘arg’],
}
}
}

hth,
Martin

>
>
> Any ideas?
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[Jakov Sosic]

On 03/31/2016 05:10 PM, Martin Alfke wrote:

> You are passing a Hash as an parameter to a define.
> Inside the define you expect the parameter to be of type String - according to what you do in the define.
>
> You need to take care of splitting data accordingly in your define:
> With Puppet 4 this is very easy to achieve:
>
> define basket (
> Hash $arg,
> ){
> $arg.each |String $key, Hash $value| {
> file { “/tmp/${key}”:
> ensure => file,
> content => $value[‘arg’],
> }
> }
> }

Thanks for an idea. I didn't know something like that is possible...



Why couldn't I just use create_resources? If I try with create_resources:

create_resources(@basket, $foobar)


I get this:

[Martin Alfke]

You need to fix the content of $foobar

Generally it works:
https://github.com/puppetlabs/puppet/blob/master/lib/puppet/parser/functions/create_resources.rb

But no longer required since Puppet 4:
https://docs.puppetlabs.com/puppet/latest/reference/lang_resources_advanced.html#implementing-the-createresources-function

>
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> To unsubscribe from this group and stop receiving emails from it, send an email to puppet-users...@googlegroups.com.

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[Jakov Sosic]

On 03/31/2016 05:40 PM, Martin Alfke wrote:
> Generally it works:
> https://github.com/puppetlabs/puppet/blob/master/lib/puppet/parser/functions/create_resources.rb
>
> But no longer required since Puppet 4:
> https://docs.puppetlabs.com/puppet/latest/reference/lang_resources_advanced.html#implementing-the-createresources-function

Thanks!

I've decided to stick with create_resources :)