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require 'puppet/node'
require 'puppet/indirector/ldap'
class Puppet::Node::Ldap < Puppet::Indirector::Ldap
desc "Search in LDAP for node configuration information. See
the `LdapNodes`:trac: page for more information. This will first
search for whatever the certificate name is, then (if that name
contains a '.') for the short name, then 'default'."
# The attributes that Puppet class information is stored in.
def class_attributes
# LAK:NOTE See http://snurl.com/21zf8 [groups_google_com]
x = Puppet[:ldapclassattrs].split(/\s*,\s*/)
end
# Separate this out so it's relatively atomic. It's tempting to call
# process() instead of name2hash() here, but it ends up being
# difficult to test because all exceptions get caught by ldapsearch.
# LAK:NOTE Unfortunately, the ldap support is too stupid to throw anything
# but LDAP::ResultError, even on bad connections, so we are rough handed
# with our error handling.
def name2hash(name,name_env,node_type)
info = nil
ldapsearch(search_filter(name)) {
|entry| info = entry2hash(entry)
if info[:environment]
if name_env == info[:environment]
return info
else
info = nil
end
else
info_env = "production"
if name_env == info[:environment]
return info
else
info = nil
end
end
}
if node_type == 'parent'
raise Puppet::Error.new("Could not find node '%s' with environment '%s'" % [name,name_env])
end
info = name2hash('default',name_env,'parent')
return info
end
# Look for our node in ldap.
def find(request)
names = [request.key]
if request.key.include?(".") # we assume it's an fqdn
names << request.key.sub(/\..+/, '')
end
names << "default"
node = nil
names.each do |name|
facts = Puppet::Node::Facts.find(name)
if facts.values["environment"]
name_env = facts.values["environment"]
else
name_env = "production"
end
info = name2hash(name,name_env,'child')
next if info == nil
if info
break if node = info2node(request.key, info)
end
end
return node
end
# Find more than one node. LAK:NOTE This is a bit of a clumsy API, because the 'search'
# method currently *requires* a key. It seems appropriate in some cases but not others,
# and I don't really know how to get rid of it as a requirement but allow it when desired.
def search(request)
if classes = request.options[:class]
classes = [classes] unless classes.is_a?(Array)
filter = "(&(objectclass=puppetClient)(puppetclass=" + classes.join(")(puppetclass=") + "))"
else
filter = "(objectclass=puppetClient)"
end
infos = []
ldapsearch(filter) { |entry| infos << entry2hash(entry, request.options[:fqdn]) }
return infos.collect do |info|
info2node(info[:name], info)
end
end
# The parent attribute, if we have one.
def parent_attribute
if pattr = Puppet[:ldapparentattr] and ! pattr.empty?
pattr
else
nil
end
end
# The attributes that Puppet will stack as array over the full
# hierarchy.
def stacked_attributes(dummy_argument=:work_arround_for_ruby_GC_bug)
Puppet[:ldapstackedattrs].split(/\s*,\s*/)
end
# Convert the found entry into a simple hash.
def entry2hash(entry, fqdn = false)
result = {}
cn = entry.dn[ /cn\s*=\s*([^,\s]+)/i,1]
dcs = entry.dn.scan(/dc\s*=\s*([^,\s]+)/i)
result[:name] = fqdn ? ([cn]+dcs).join('.') : cn
result[:parent] = get_parent_from_entry(entry) if parent_attribute
result[:classes] = get_classes_from_entry(entry)
result[:stacked] = get_stacked_values_from_entry(entry)
result[:parameters] = get_parameters_from_entry(entry)
result[:environment] = result[:parameters]["environment"] if result[:parameters]["environment"]
result[:stacked_parameters] = {}
if result[:stacked]
result[:stacked].each do |value|
param = value.split('=', 2)
result[:stacked_parameters][param[0]] = param[1]
end
end
if result[:stacked_parameters]
result[:stacked_parameters].each do |param, value|
result[:parameters][param] = value unless result[:parameters].include?(param)
end
end
result[:parameters] = convert_parameters(result[:parameters])
result
end
# Default to all attributes.
def search_attributes
ldapattrs = Puppet[:ldapattrs]
# results in everything getting returned
return nil if ldapattrs == "all"
search_attrs = class_attributes + ldapattrs.split(/\s*,\s*/)
if pattr = parent_attribute
search_attrs << pattr
end
search_attrs
end
# The ldap search filter to use.
def search_filter(name)
filter = Puppet[:ldapstring]
if filter.include? "%s"
# Don't replace the string in-line, since that would hard-code our node
# info.
filter = filter.gsub('%s', name)
end
filter
end
private
# Add our hash of ldap information to the node instance.
def add_to_node(node, information)
node.classes = information[:classes].uniq unless information[:classes].nil? or information[:classes].empty?
node.parameters = information[:parameters] unless information[:parameters].nil? or information[:parameters].empty?
node.environment = information[:environment] if information[:environment]
end
def convert_parameters(parameters)
result = {}
parameters.each do |param, value|
if value.is_a?(Array)
result[param] = value.collect { |v| convert(v) }
else
result[param] = convert(value)
end
end
result
end
# Convert any values if necessary.
def convert(value)
case value
when Integer, Fixnum, Bignum; value
when "true"; true
when "false"; false
else
value
end
end
# Find information for our parent and merge it into the current info.
def find_and_merge_parent(parent, information)
if information[:environment]
name_env = information[:environment]
else
name_env = 'production'
end
parent_info = name2hash(parent,name_env,'parent')
if parent_info
information[:classes] += parent_info[:classes]
parent_info[:parameters].each do |param, value|
# Specifically test for whether it's set, so false values are handled
# correctly.
information[:parameters][param] = value unless information[:parameters].include?(param)
end
information[:environment] ||= parent_info[:environment]
parent_info[:parent]
else
raise Puppet::Error.new("Could not find parent node '%s'" % parent)
nil
end
end
# Take a name and a hash, and return a node instance.
def info2node(name, info)
merge_parent(info) if info[:parent]
node = Puppet::Node.new(name)
add_to_node(node, info)
node.fact_merge
node
end
def merge_parent(info)
parent_info = nil
parent = info[:parent]
# Preload the parent array with the node name.
parents = [info[:name]]
while parent
if parents.include?(parent)
raise ArgumentError, "Found loop in LDAP node parents; %s appears twice" % parent
end
parents << parent
parent = find_and_merge_parent(parent, info)
end
return info
end
def get_classes_from_entry(entry)
result = class_attributes.inject([]) do |array, attr|
if values = entry.vals(attr)
values.each do |v| array << v end
end
array
end
result.uniq
end
def get_parameters_from_entry(entry)
stacked_params = stacked_attributes
entry.to_hash.inject({}) do |hash, ary|
unless stacked_params.include?(ary[0]) # don't add our stacked parameters to the main param list
if ary[1].length == 1
hash[ary[0]] = ary[1].shift
else
hash[ary[0]] = ary[1]
end
end
hash
end
end
def get_parent_from_entry(entry)
pattr = parent_attribute
return nil unless values = entry.vals(pattr)
if values.length > 1
raise Puppet::Error,
"Node entry %s specifies more than one parent: %s" % [entry.dn, values.inspect]
end
return nil if values.empty?
return values.shift
end
def get_stacked_values_from_entry(entry)
stacked_attributes.inject([]) do |result, attr|
if values = entry.vals(attr)
result += values
end
result
end
end
end
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