environmentpath in manifest

[Daniele Palumbo]

Hi,

i need to check if a file exists on the puppet master.

No big deal:
http://stackoverflow.com/questions/18784329/how-to-test-for-existence-of-a-file-on-the-puppet-master

So i made:
--
cat ./modules/braveconf/lib/puppet/parser/functions/file_exists.rb
require"puppet"
module Puppet::Parser::Functions
newfunction(:file_exists, :type => :rvalue) do |args|
if File.exists?(args[0])
return 1
else
return 0
end
end
end
--

Now, my problem is about path.

Since i have environmentpath, as seen is
puppet config print environmentpath --section master --environment development
/etc/puppetlabs/code/environments

I would like to use, in the manifest:
--
if ( file_exists ("${::environmentpath}/${::environment}/modules/module/files/configfile-${::hostname}") == 1 ) {
--

But ${::environmentpath} is empty.

How can i manage this topic, avoiding to hardcode /etc/puppetlabs/code/environments in the code?
Is there a way to get variable from puppet master config?

Thanks,
Daniele

[Martin Alfke]

Hi Daniele,

You might want to access the Puppet settings:

Puppet.initialize_settings unless Puppet[:confdir]

and then check for the environmentpath setting.

>
> How can i manage this topic, avoiding to hardcode /etc/puppetlabs/code/environments in the code?
> Is there a way to get variable from puppet master config?
>
> Thanks,
> Daniele
>
>

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[Daniele Palumbo]

Il giorno 12/mag/2016, alle ore 10:19, Martin Alfke <tux...@gmail.com> ha scritto:
> You might want to access the Puppet settings:
>
> Puppet.initialize_settings unless Puppet[:confdir]
>
> and then check for the environmentpath setting.

Hi Martin,

Thank you very much for your hint.

But I am not able to understand how to write it.
How can I interlock between this ruby code and the manifest?

Sorry if this is a FAQ question :)
Do you have some link or example to understand how this should work?

Thank you very much,
Daniele

[Martin Alfke]

Hi Daniele,

On 13 May 2016, at 02:13, Daniele Palumbo <dan...@retaggio.net> wrote:

> Il giorno 12/mag/2016, alle ore 10:19, Martin Alfke <tux...@gmail.com> ha scritto:
>> You might want to access the Puppet settings:
>>
>> Puppet.initialize_settings unless Puppet[:confdir]
>>
>> and then check for the environmentpath setting.
>
>
> Hi Martin,
>
> Thank you very much for your hint.
>
> But I am not able to understand how to write it.
> How can I interlock between this ruby code and the manifest?

The Ruby part must be a function - like in the example you provided in your first email.
You can then use the function inside your manifest.

Functions are always executed on the Master.

Best,
Martin

>
> Sorry if this is a FAQ question :)
> Do you have some link or example to understand how this should work?
>
> Thank you very much,
> Daniele
>

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[watt...@gmail.com]

You may need to create a custom fact to determine the environment when
the agent runs. For example, here's a
custom fact that reads the environment from a file.

Facter.add("environment") do
setcode do
Facter::Util::Resolution.exec('/bin/cat /usr/local/etc/environment')
end
end

Your site manifest can also be set to update the file contents when it runs.

[Michael Watters]

You may need to create a custom fact to determine the environment when 
the agent runs.  For example, here's a
custom fact that reads the environment from a file.

Facter.add("environment") do
   setcode do
     Facter::Util::Resolution.exec('/bin/cat /usr/local/etc/environment')
   end
end

Your site manifest can also be set to update the file contents when it runs.

[Daniele Palumbo]

Hi Michael,

there are 2 possibilities:
1) i have not got what you mean.

2) you have not got what i mean.

To better explain:
your suggestion is to look over a fact in the agents.
my needed environmentpath variable is the master one.
i need to check over the existence of a file, but i want to have the full path as variables.
in example: $confdir in puppet.conf, but master section, not agent one.

which of the 2 cases? :)

Thanks in any case!

Daniele

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[Daniele Palumbo]

Hi Martin,

Il giorno 13/mag/2016, alle ore 09:36, Martin Alfke <tux...@gmail.com> ha scritto:
> The Ruby part must be a function - like in the example you provided in your first email.
> You can then use the function inside your manifest.
>
> Functions are always executed on the Master.

After a couple of try, i understood it.

for anyone looking at the same solution, my code:

manifest:
$masterenvpath = print_environmentpath()
$path = "${masterenvpath}/${::environment}/modules/braveconf/files/puppet/puppet.conf-${::hostname}"
if ( file_exists ("${path}") == 1 ) {

function:
lib/puppet/parser/functions/print_environmentpath.rb

require"puppet"
module Puppet::Parser::Functions

newfunction(:print_environmentpath, :type => :rvalue) do |args|
Puppet.initialize_settings unless Puppet[:environmentpath]
path = Puppet[:environmentpath]
if File.exists?(path)
path
else
nil
end
end
end


Thank you very much Martin!

Daniele