You have to figure out the resource[:name] var yourself for
self.instances. The resource hash is not meant to be used at that
stage.
The goal for self.instances is to retrieve all existing resources (and
their attributes) without prior knowledge from Puppet. This is how
Puppet creates its internal representation of what resources exist on
the current system - and is used for purge and also for 'puppet
resource foo' :-).
The methodology is going to differ depending on the implementation but
for iptables for example we use the --comment field, extract that &
stuff it into :name. For onecluster/onehost from Opennebula its in the
initial list I get from onecluster/onehost list etc. etc.
ken.
On Mon, Jun 13, 2011 at 4:49 AM, Dan Bode <bod...@gmail.com> wrote:
> Hi all,
>
> I am trying to understand how self.instances is supposed to work.
>
> I have implemented it as below (which I tried to construct based on examples
> I found in puppet's source) :
>
> def self.instances
> rabbitmqctl('list_users').split(/\n/)[1..-2].collect do |line|
> if line =~ /^(\S+)\s+(\S+)$/
> new(:name => $1, :admin => $2)
> else
> raise Puppet::Error, "Cannot parse invalid user line: #{line}"
> end
> end
> end
>
> By making a single call, I can retrieve all namevars and their properties
> (which I return as an array of Provider instances)
>
> When running:
>
> puppet resource rabbitmq_user
>
> I get the following error:
>
> /vagrant/modules/rabbitmq/lib/puppet/provider/rabbitmq_user/rabbitmqctl.rb:41:in
> `admin': undefined method `[]' for nil:NilClass (NoMethodError)
> from
> /vagrant/modules/rabbitmq/lib/puppet/provider/rabbitmq_user/rabbitmqctl.rb:40:in
> `each'
> from
> /vagrant/modules/rabbitmq/lib/puppet/provider/rabbitmq_user/rabbitmqctl.rb:40:in
> `admin'
> from /vagrant/puppet/lib/puppet/property.rb:246:in `send'
> from /vagrant/puppet/lib/puppet/property.rb:246:in `retrieve'
> from /vagrant/puppet/lib/puppet/type.rb:710:in `retrieve'
> from /vagrant/puppet/lib/puppet/type.rb:704:in `each'
> from /vagrant/puppet/lib/puppet/type.rb:704:in `retrieve'
> from /vagrant/puppet/lib/puppet/type.rb:718:in `retrieve_resource'
> from /vagrant/puppet/lib/puppet/type.rb:1893:in `to_trans'
> from /vagrant/puppet/lib/puppet/type.rb:1918:in `to_resource'
> from /vagrant/puppet/lib/puppet/indirector/resource/ral.rb:16:in
> `search'
> from /vagrant/puppet/lib/puppet/indirector/resource/ral.rb:14:in `map'
> from /vagrant/puppet/lib/puppet/indirector/resource/ral.rb:14:in
> `search'
> from /vagrant/puppet/lib/puppet/indirector/indirection.rb:248:in
> `search'
> from /vagrant/puppet/lib/puppet/application/resource.rb:186:in `main'
> from /vagrant/puppet/lib/puppet/application.rb:315:in `run_command'
> from /vagrant/puppet/lib/puppet/application.rb:307:in `run'
> from /vagrant/puppet/lib/puppet/application.rb:411:in `hook'
> from /vagrant/puppet/lib/puppet/application.rb:307:in `run'
> from /vagrant/puppet/lib/puppet/application.rb:402:in `exit_on_fail'
> from /vagrant/puppet/lib/puppet/application.rb:307:in `run'
> from /vagrant/puppet/lib/puppet/util/command_line.rb:62:in `execute'
> from /vagrant/puppet/bin/puppet:4
>
> The error is because retrieve is being called on the type (which causes
> retrieve to be called for the admin property)
>
> This causes the following code to be invoked:
>
> def admin
> #puts resource.inspect
> rabbitmqctl('list_users').split(/\n/)[1..-2].each do |line|
> return line.match(/^#{resource[:name]}\s+(\S+)$/)[1].to_sym
> end
> raise 'Admin field is only supported on version 2.4.1'
> end
>
> which fails b/c resource is not set
>
> my questions follow:
>
> 1. Am I doing something blatantly wrong?
> 2. Is self.instances just supposed to set parameters and then rely on
> calling type.retrieve to fill in its properties?
> if this is the case, how am I supposed to set the :name param (or any
> other params it may need)
>
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