puppet/modules/site_config/manifests/hosts.pp


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class site_config::hosts() {

  $hosts = hiera('hosts','')
  $hostname = hiera('name')

  file { "/etc/hostname":
    ensure => present,
    content => $hostname
  }

  exec { "/bin/hostname $hostname":
    subscribe   => [ File['/etc/hostname'], File['/etc/hosts'] ],
    refreshonly => true;
  }

  file { '/etc/hosts':
    content => template('site_config/hosts'),
    mode    => '0644', owner => root, group => root;
  }
}