Re: [Puppet Users] How to access $facts['os'] in a manifest

[Henrik Lindberg]

On 02/06/16 15:55, Marc Haber wrote:
On Thu, Jun 02, 2016 at 03:41:35PM +0200, Henrik Lindberg wrote:
On 02/06/16 14:58, Marc Haber wrote:
On Thu, Jun 02, 2016 at 02:42:17PM +0200, Henrik Lindberg wrote:
On 02/06/16 09:22, Marc Haber wrote:
On Wed, Jun 01, 2016 at 05:34:59PM +0200, Henrik Lindberg wrote:
First check what you get in puppet with a simple manifest:
notice($facts)

$ sudo puppet apply -e 'notify{"${os}":}'
Notice: Compiled catalog for host in environment production in 0.02 seconds
Notice: {"name"=>"CentOS", "family"=>"RedHat", "release"=>{"major"=>"7", "minor"=>"2", "full"=>"7.2.1511"}, "lsb"=>{"distcodename"=>"Core", "distid"=>"CentOS", 
"distdescription"=>"CentOS Linux release 7.2.1511 (Core) ", "release"=>":core-4.1-amd64:core-4.1-noarch", "distrelease"=>"7.2.1511", "majdistrelease"=>"7", "minordistrelease"=>"2"}}
Notice: /Stage[main]/Main/Notify[{"name"=>"CentOS", "family"=>"RedHat", "release"=>{"major"=>"7", "minor"=>"2", "full"=>"7.2.1511"}, "lsb"=>{"distcodename"=>"Core", "distid"=>"CentOS", "distdescription"=>"CentOS Linux release 7.2.1511 (Core) ", "release"=>":core-4.1-amd64:core-4.1-noarch", "distrelease"=>"7.2.1511", "majdistrelease"=>"7", "minordistrelease"=>"2"}}]/message: 
defined 'message' as '{"name"=>"CentOS", "family"=>"RedHat", "release"=>{"major"=>"7", "minor"=>"2", "full"=>"7.2.1511"}, "lsb"=>{"distcodename"=>"Core", "distid"=>"CentOS", "distdescription"=>"CentOS Linux release 7.2.1511 (Core) ", "release"=>":core-4.1-amd64:core-4.1-noarch", "distrelease"=>"7.2.1511", "majdistrelease"=>"7", "minordistrelease"=>"2"}}'
Notice: Finished catalog run in 0.70 seconds
$ sudo puppet apply -e 'notify{"foo ${facts}":}'
Notice: Compiled catalog for host in environment production in 0.03 seconds
Notice: foo
Notice: /Stage[main]/Main/Notify[foo ]/message: defined 'message' as 'foo '
Notice: Finished catalog run in 0.81 seconds
$ sudo puppet --version
3.8.6

Unfortunately, I cannot see here whether ${os} is actually a string,
can I?


When you notice ${os} it turns the value into the printed string. That
string looks like a hash, so you are indeed seeing a structure value where
you should be able to access $os[name] etc.

How would it look like if ${os} were actually a hash?

Like in the output you got (above).
i.e. { "name" => "CentOS", "family" => " ...", ... }

We're turning around in circles. So I cannot see in a notify whether I
am notifying a hash or a stringyfied hash.


Correct, you cannot see the difference.

With future parser you can do:

notice($os =~ Hash)

Which will notice 'true' if $os is a hash

There may be a stdlib function that does something similar - look for 
something like is_hash()

- henrik



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