Online note of a manifest I regularly use to create swap on AWS EC2 Ubuntu instances.

swap.pp

exec { "mkswap":
  command => "dd if=/dev/zero of=/swap bs=1024 count=$((1226*1024)); mkswap /var/swapfile",
  creates => "/var/swapfile"
}

file { "/var/swapfile":
  ensure => present,
  mode => 600,
  require => Exec["mkswap"]
}

mount { "swap":
  ensure => defined,
  device => "/var/swapfile",
  options => "defaults",  
  fstype => swap,
  require => [ Exec["mkswap"], File["/var/swapfile"]]
}

exec { "swapon -a":
  require => Mount["swap"]
}