Create a block of pool accounts for grid with puppet.

steves.pp

#!/usr/bin/puppet apply 

class {'grid_users':}

class grid_users {
  #group { "cmsusr":
  #  ensure => present,
  #  gid => 4050
  #}
  #group { "cmssgm":
  #  ensure => present,
  #  gid => 4070
  #}
  
  userblock{ 'cmssgm':
      startuid  => 43590,
      count     => 9,
      prefix    => 'cmsusr',
      group     => 'cmsusr',
      secondary => ['cmssgm','random']
  }
}


define userblock ($prefix = $title, $count = 1, $startuid , $secondary = [], $group = $title ) {


   $yaml = inline_template('
---
<% @count.to_i.times do |i| -%>
<%= @prefix %><%= i.to_s %>:
      uid: <%= i + @count.to_i %>
      gid: <%= @title %>
<% if @secondary.length >= 1 then -%>
      groups:
<% @secondary.each do |grp| -%>
         <%= grp %>
<% end -%>
<% end -%>
<% end -%>
')  
   notice($yaml)
   $userdata = parseyaml($yaml)
   create_resources(user,$userdata)


}

users.yaml

---
cmsusr0:
      uid: 9
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr1:
      uid: 10
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr2:
      uid: 11
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr3:
      uid: 12
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr4:
      uid: 13
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr5:
      uid: 14
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr6:
      uid: 15
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr7:
      uid: 16
      gid: cmssgm
      groups:
         cmssgm
         random
cmsusr8:
      uid: 17
      gid: cmssgm
      groups:
         cmssgm
         random

Fantastic, you use inline_template to represent the hash of user data as yaml and then parseyaml to
convert to a hash before feeding the whole lot to create_resources.

Job done.