Puppet 无法评估获取错误：无法确定卷是否存在

运行puppet

puppet代理-t时出现此错误：

Error: /Stage[main]/Environment/Environment::Createenv[shared2]/Volume[shared2]: Could not evaluate: No ability to determine if volume exists
Error: /Stage[main]/Environment/Environment::Createenv[shared1]/Volume[shared1]: Could not evaluate: No ability to determine if volume exists

以下是environment/manifest/init.pp的代码

class environment(){
            volume { "${title}":
              ensure      => present,
              location    => "/home",
              mode        => 0750,
              owner       => "${title}",
              group       => "env",
              device_name => undef,
              device_size => 10,
              az          => undef,
              instance_id => undef,
            }
}

和提供程序文件（lib/puppet/provider/ebs.rb）：

和类型（lib/puppet/type/volume.rb）：

Puppet版本3.0.1（服务器和客户端）。有人知道吗？谢谢你找到了

只需将提供程序文件移动到与类型同名的目录。在我的例子中/etc/puppet/modules/environment/lib/puppet/provider/volume/ebs.rb

其中environment是自定义模块的名称，volume是自定义类型。
这对我很有帮助。谢谢
require 'puppet/resource'
require 'puppet/resource/catalog'
require 'fileutils'
require 'rubygems'
require 'facter'
require 'aws-sdk'
require File.dirname(__FILE__) + '/aws-config'
include Puppet::Util::Volume
include AwsConfig

Puppet::Type.type(:volume).provide(:ebs) do
  desc "Create, attach, format and mount EBS volumes"

  defaultfor :kernel => "Linux"

  def create
    az = Facter.value('ec2_placement_availability_zone')
    puts "Some code here ..."
  end

  def destroy
    raise NotImplementedError
  end

  def exists?
    return File.directory?(@resource[:name])
  end

end

require 'puppet/type'
Puppet::Type.newtype(:volume) do
  @doc = "Create new volume. Limited to EBS volumes"

  ensurable do
    self.defaultvalues
    defaultto :present
  end

  newparam(:name) do
    desc "Name of resource"
    isnamevar
  end

  newparam(:location) do
    desc "path to directory where the volume will be mounted"
  end
end