Facter unable to parse custom fact

[Maxim Nikolaev]

Hello

I have strange experience with facter on newly installed servers.

Puppet: 3.6.2
Facter: 2.1.0
OS: Amazon Linux

when I set custom fact to /etc/facter/facts.d and run facter locally I get following error
Fact file /etc/facter/facts.d/services.rb was parsed but returned an empty data set


When I copy same file to
/usr/lib/ruby/site_ruby/1.8/facter/
and run same command - facter works ok.


Can someone advise why thi can happen?

[Peter Bukowinski]

When using external facts -- those placed into /etc/facter/facts.d -- on linux, you can use either structured data (yaml, json, or txt), or executable files (shell/ruby/python/perl/etc) to generate facts, but the content/output of these executable files must be in 'key=value'.

If you are unable to run '/etc/facter/facts.d/services.rb' directly from the terminal and have it generate STDOUT in the form of 'factname=factvalue' then you must modify it so that it does. Check that you have a shebang line (like '#!/usr/bin/env ruby') at the top and that the file is executable.

--
Peter Bukowinski

[Maxim Nikolaev]

The problem is not fact script. I I run it from /usr/lib/ruby/site_ruby/1.8/facter/ it's working. When I set it to
/etc/facter/facts.d - I get errors. More. If I make link from /etc/facter/facts.d to /usr/lib/ruby/site_ruby/1.8/facter/ also other fact scripts fail.

[David Schmitt]

Dear Maxim,

/etc/facter/facts.d and /usr/lib/ruby/site_ruby/1.8/facter/ are used for
two completely different kinds of scripts that cannot be mixed.

/etc/facter/facts.d contains either text files with *static* facts OR
executable *programs* returning a specific text format.

/usr/lib/ruby/site_ruby/1.8/facter/ contains autoloaded ruby code that
is loaded into facter and produces a value internally.

Since these two locations are handled completely differently, linking or
copying from one location to the other cannot work.

Please see the custom fact documentation for more details:

> http://docs.puppetlabs.com/guides/custom_facts.html



Regards, David

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[Maxim Nikolaev]

As I understand from Facrer 2 manual (http://docs.puppetlabs.com/facter/2.1/custom_facts.html#adding-custom-facts-to-facter) I can set all custom facts to  /etc/facts/facts.d.
Fact example:

Facter.add("role") do
  setcode do
    Facter::Util::Resolution.exec('ec2-describe-tags -O KEY -W KEY --filter "resource-id=$(ec2-metadata -i | cut -d " " -f2)" --filter "key=Role" | cut -f5 -')
  end
end

It's not far from examples that are in manual.

When I try to set this fact to /etc/facts/facts.d - I get error: Fact file /etc/facter/facts.d/role.rb was parsed but returned an empty data set
Even if I try to use simple example from manual (

hardware_platform.rb) - I get same error.

On Tuesday, July 15, 2014 5:10:59 PM UTC+3, Maxim Nikolaev wrote:

[José Luis Ledesma]

You are confusing custom and external facts, as david explained.

Regards,

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