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greg0ire
Asked: 2013-08-13 02:14:09 +0800 CST

Puppet: Move file to a different location based on the existence of a directory

  • 772

I have this configuration:

file { 
     "/tmp/apc.ini":
     source => "puppet:///modules/uc/php/apc.ini",
     require => Package["php-apc"]
  } 

  exec {
    "Add apc.ini to php mods-available":
    command => 'mv /tmp/apc.ini /etc/php5/mods-available/apc.ini',
    onlyif =>  "test -d /etc/php5/mods-available",
    require => File["/tmp/apc.ini"]
  }

  exec { 
    "Add apc.ini to php conf.d":
    command => 'mv /tmp/apc.ini /etc/php5/conf.d/apc.ini',
    unless =>  "test -d /etc/php5/mods-available",
    require => File["/tmp/apc.ini"]
  }

I'd like to be able to simplify this so that the /tmp/apc.ini file isn't created every time I run puppet agent --test

For the moment, I get the following output:

info: Retrieving plugin
info: Loading facts in /var/lib/puppet/lib/facter/root_home.rb
info: Loading facts in /var/lib/puppet/lib/facter/concat_basedir.rb
info: Loading facts in /var/lib/puppet/lib/facter/postgres.rb
info: Loading facts in /var/lib/puppet/lib/facter/puppet_vardir.rb
info: Caching catalog for frontapp0.demo.infra.universcine.com
info: Applying configuration version '1376302253'
notice: /Stage[main]/Uc::Role::Php/File[/tmp/apc.ini]/ensure: defined content as '{md5}e5f5a158bd83469ce031b20ec72ce717'
notice: /Stage[main]/Uc::Role::Php/Exec[Add apc.ini to php mods-available]/returns: executed successfully
notice: Finished catalog run in 36.12 seconds

What can I try ?

UPDATE The goal is to have apc.ini either in mods-available or in conf.d, depending on whether the former exists or not

puppet

1 Answers

  1. Best Answer

    A simple way to accomplish this would be to deploy a custom fact. If you're using the puppet-stdlib module, you can write custom facts in the language of your choice by dropping an executable script into /etc/facter/facts.d (see this article for details). For example, if you created a script /etc/facter/facts.d/apc_ini_path with the following contents (and made sure it was executable):

    #!/bin/sh
if [ -d /etc/php5/mods-available ]; then
  echo "apc_ini_path=/etc/php5/mods-available"
else
  echo "apc_ini_path=/etc/php5/conf.d/"
fi

    Then you would have available a fact "apc_ini_path", and you could do this:

    file { "$apc_ini_path/apc.ini":
    source => "puppet:///modules/uc/php/apc.ini",
    require => Package["php-apc"]
}

    Of course, if you're comfortable with Ruby you can also just drop a Ruby fact into YOURMODULE/lib/facter/yourfact.rb using the examples presented in the same article. They provide a sample Ruby fact that's pretty trivial:

    # hardware_platform.rb

Facter.add("hardware_platform") do
  setcode do
    Facter::Util::Resolution.exec('/bin/uname -i')
  end
end

    It should be fairly easy to replace this with a directory existence check.

    • 4