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Execute a list of resources only if path exist

asked 2017-04-26 03:14:45 -0500

I try to install jdk from source, simply decompress file in a location:

exec { "rm -f /tmp/${filename}":
  path    => [ "/bin" ],
  cwd     => "/tmp",
  command => "rm -f /tmp/${filename}",
  require => Exec["tar xzf /tmp/${filename} -C ${path}"],
}

exec { "tar xzf /tmp/${filename} -C ${path}":
  path    => [ "/bin/" ],
  cwd     => "/tmp",
  command => "tar xzf /tmp/${filename} -C ${path}",
  require => File["/tmp/${filename}"],
}

file { "/tmp/${filename}":
  source => "puppet:///software/java/${version}/${filename}",
  mode => '0755',
  require => File["${path}"],
}

file { "${path}":
  ensure => 'directory',
  owner  => 'root',
  group  => 'root',
  mode   => '0750',
}

but i can execute this only if not install previously. I want to do something like this:

if /opt/java/jdk1.8.0_20 directory don't exist {

executre resources

}

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answered 2017-05-02 17:55:02 -0500

The only way I could find to do this was with a custom fact that used Ruby to query the local file system. In my case, I don't want to configure an apache vhost until Let's Encrypt has delivered me a certificate. However, the traditional method of using a requires means that the vhost startup fails, and then prevents all of apache starting up, meaning let's encrypt won't work.

Here's the custom fact code that I use. Modify it to match the conditions you require:

require "pathname"

cert_dir = "/etc/letsencrypt/live"

Facter.add(:webserver_certs_live) do
  live_certs_hash = {}

  if File.exists?(cert_dir)
    live_certs_hash = Pathname.new(cert_dir).children.select(&:directory?).collect(&:basename)
  end

  setcode do
    live_certs_hash
  end
end

Then in my module, I use this:

if $vhost_fqdn in $::webserver_certs_live {
  apache::vhost { ....
  }
}
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Asked: 2017-04-26 03:14:45 -0500

Seen: 23 times

Last updated: Apr 26