isabella232 / puppet-ldapquery

Query an LDAP server using Puppet.

Puppet-LDAPquery

A Puppet function to query LDAP.

Dependencies

The Ruby net-ldap gem is required to communicate with LDAP.

Sample Usage

On the Master

You must set the necessary variables in puppet.conf so the master can connect to your LDAP server.

You can simply add the static values like so:

[master]
ldaptls = true
ldapport = 636
ldapserver = ldap.example.com
ldapbase = dc=example,dc=com
ldapuser = cn=puppet,ou=people,dc=example,dc=com
ldappassword = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Or, use Puppet to manage the values in puppet.conf by adding something like the following to the manifest that manages your master's puppet.conf.

$ldap_base   = hiera('ldap_base') # dc=example,dc=com
$ldap_user   = hiera('ldap_user') # cn=ldapuser,dc=puppetlabs,dc=com
$ldap_pass   = hiera('ldap_pass') # ultrasecure

package { 'net-ldap':
  ensure   => present,
  provider => 'gem'
}

file { '/etc/puppet/ldap_ca.pem':
  owner  => 'root',
  group  => '0',
  mode   => '0644',
  source => /path/to/my/ldap/ca.pem,
}

Ini_setting {
  ensure  => present,
  section => 'master',
  path    => '/etc/puppet/puppet.conf',
}

ini_setting { 'ldapserver':
  setting => 'ldapserver',
  value   => 'ldap.example.com',
}

ini_setting { 'ldapport':
  setting => 'ldapport',
  value   => '636',
}

ini_setting { 'ldapbase':
  setting => 'ldapbase',
  value   => $ldap_base,
}

ini_setting { 'ldapuser':
  setting => 'ldapuser',
  value   => $ldap_user,
}

ini_setting { 'ldappassword':
  setting => 'ldappassword',
  value   => $ldap_pass,
}

ini_setting { 'ldaptls':
  setting => 'ldaptls',
  value   => true,
}

In manifest

Simply passing an rfc4515 search filter string to ldapquery() will return the results of the query in list form. Optionally, a list of attributes of which to return the values may also be passed.

Consider the following manifest.

$attributes = [
  'loginshell',
  'uidnumber',
  'uid',
  'homedirectory',
]

$zach = ldapquery('(uid=zach)', $attributes)

Assuming there is only one LDAP object with the uid=zach, then the variable $zach now holds the following data structure:

[
  {
    'uid' => ['zach'],
    'loginshell' => ['/bin/zsh'],
    'uidnumber' => ['123'],
    'homedirectory' => ['/var/users/zach'],
  }
]

Note that the key values are an array. This should make implementation code simpler, if a bit more verbose, and avoid having to check if the value is an array or a string, because it always is.

Here is a slightly more complicate example that will generate virtual ssh_authorized_key resources for every 'posixAccount' that has a non-empty 'sshPublicKey' attribute.

$attributes = [
  'uid',
  'sshPublicKey'
]

$key_query = '(&(objectClass=ldapPublicKey)(sshPublicKey=*)(objectClass=posixAccount))'

$key_results  = ldapquery($key_query, $attributes)
$key_results.each |$u| {
  any2array($u['sshpublickey']).each |$k| {
    $keyparts = split($k, ' ')

    # Retrieve the comment portion
    if $keyparts =~ Array[String, 3] {
      $comment  = $keyparts[2]
    } else {
      $comment  = ''
    }

    $uid = $u['uid'][0]

    @ssh_authorized_key { "${uid}_${comment}":
      user => $uid,
      type => $keyparts[0],
      key  => $keyparts[1],
      tag  => 'ldap',
    }
  }
}