Puppet

When you create a resourcetype with more than one namevar creating an instance of your type will lead to an error:

Instance creation:

ressource =  @class.new(:title => 'telnet:tcp', :name => 'telnet', :protocol => :tcp, :number => '23')

Error:

Resource type port does not support parameter false

with port beeing a resourcetype with name and protocal as a namevar. The reason is that puppet treats the parameter :name special. When puppet tries to set the name with resource[:name] = value, it substitutes :name with whatever the namevar is. Because namevar returns false when we have more than one key_attribute, puppet tries to set a parameter “false” which does not exists.