diff --git a/manifests/node.pp b/manifests/node.pp
index e61aa2e..7d65f37 100644
--- a/manifests/node.pp
+++ b/manifests/node.pp
@@ -1,165 +1,179 @@
 # munin::node - Configure a munin node, and export configuration a
 # munin master can collect.
 #
 # Parameters:
 #
 # allow: List of IPv4 and IPv6 addresses and networks to allow to connect.
 #
 # config_root: Root directory for munin configuration.
 #
 # nodeconfig: List of lines to append to the munin node configuration.
 #
 # host_name: The host name munin node identifies as. Defaults to
 # the $::fqdn fact.
 #
 # log_dir: The log directory for the munin node process. Defaults
 # change according to osfamily, see munin::params::node for details.
 #
 # log_file: Appended to "log_dir". Defaults to "munin-node.log".
 #
 # log_destination: "file" or "syslog".  Defaults to "file".  If log_destination
 # is "syslog", the "log_file" and "log_dir" parameters are ignored, and the
 # "syslog_*" parameters are used if set.
 #
+# purge_configs: Removes all other munin plugins and munin plugin
+# configuration files.  Boolean, defaults to false.
+#
 # syslog_ident: Defaults to undef, which makes munin-node use its
 # default of "munin-node".
 #
 # syslog_facility: Defaults to undef, which makes munin-node use the
 # perl Net::Server module default of "daemon". Possible values are any
 # syslog facility by number, or lowercase name.
 #
 # masterconfig: List of configuration lines to append to the munin
 # master node definitinon
 #
 # mastername: The name of the munin master server which will collect
 # the node definition.
 #
 # mastergroup: The group used on the master to construct a FQN for
 # this node. Defaults to "", which in turn makes munin master use the
 # domain. Note: changing this for a node also means you need to move
 # rrd files on the master, or graph history will be lost.
 #
 # plugins: A hash used by create_resources to create munin::plugin
 # instances.
 #
 # address: The address used in the munin master node definition.
 #
 # package_name: The name of the munin node package to install.
 #
 # service_name: The name of the munin node service.
 #
 # service_ensure: Defaults to "". If set to "running" or "stopped", it
 # is used as parameter "ensure" for the munin node service.
 #
 # export_node: "enabled" or "disabled". Defaults to "enabled".
 # Causes the node config to be exported to puppetmaster.
 #
 # file_group: The UNIX group name owning the configuration files,
 # log files, etc.
 
 class munin::node (
   $address         = $munin::params::node::address,
   $allow           = $munin::params::node::allow,
   $config_root     = $munin::params::node::config_root,
   $host_name       = $munin::params::node::host_name,
   $log_dir         = $munin::params::node::log_dir,
   $log_file        = $munin::params::node::log_file,
   $masterconfig    = $munin::params::node::masterconfig,
   $mastergroup     = $munin::params::node::mastergroup,
   $mastername      = $munin::params::node::mastername,
   $nodeconfig      = $munin::params::node::nodeconfig,
   $package_name    = $munin::params::node::package_name,
   $plugins         = $munin::params::node::plugins,
+  $purge_configs   = $munin::params::node::purge_configs,
   $service_ensure  = $munin::params::node::service_ensure,
   $service_name    = $munin::params::node::service_name,
   $export_node     = $munin::params::node::export_node,
   $file_group      = $munin::params::node::file_group,
   $log_destination = $munin::params::node::log_destination,
   $syslog_ident    = $munin::params::node::syslog_ident,
   $syslog_facility = $munin::params::node::syslog_facility,
 ) inherits munin::params::node {
 
   validate_array($allow)
   validate_array($nodeconfig)
   validate_array($masterconfig)
   if $mastergroup { validate_string($mastergroup) }
   if $mastername { validate_string($mastername) }
   validate_hash($plugins)
   validate_string($address)
   validate_absolute_path($config_root)
   validate_string($package_name)
   validate_string($service_name)
   if $service_ensure { validate_re($service_ensure, '^(running|stopped)$') }
   validate_re($export_node, '^(enabled|disabled)$')
   validate_absolute_path($log_dir)
   validate_re($log_destination, '^(?:file|syslog)$')
   validate_string($log_file)
   validate_string($file_group)
+  validate_bool($purge_configs)
 
   case $log_destination {
     'file': {
       $_log_file = "${log_dir}/${log_file}"
       validate_absolute_path($_log_file)
     }
     'syslog': {
       $_log_file = 'Sys::Syslog'
       if $syslog_ident { validate_string($syslog_ident) }
       if $syslog_facility {
         validate_string($syslog_facility)
         validate_re($syslog_facility,
                     '^(?:\d+|(?:kern|user|mail|daemon|auth|syslog|lpr|news|uucp|authpriv|ftp|cron|local[0-7]))$')
       }
     }
     default: {
       fail('log_destination is not set')
     }
   }
 
   if $mastergroup {
     $fqn = "${mastergroup};${host_name}"
   }
   else {
     $fqn = $host_name
   }
 
   if $service_ensure { $_service_ensure = $service_ensure }
   else { $_service_ensure = undef }
 
   # Defaults
   File {
     ensure => present,
     owner  => 'root',
     group  => $file_group,
     mode   => '0444',
   }
 
   package { $package_name:
     ensure => installed,
   }
 
   service { $service_name:
     ensure  => $_service_ensure,
     enable  => true,
     require => Package[$package_name],
   }
 
   file { "${config_root}/munin-node.conf":
     content => template('munin/munin-node.conf.erb'),
     require => Package[$package_name],
     notify  => Service[$service_name],
   }
 
   # Export a node definition to be collected by the munin master
   if $export_node == 'enabled' {
     @@munin::master::node_definition{ $fqn:
       address    => $address,
       mastername => $mastername,
       config     => $masterconfig,
       tag        => [ "munin::master::${mastername}" ]
     }
   }
 
   # Generate plugin resources from hiera or class parameter.
   create_resources(munin::plugin, $plugins, {})
 
+  # Purge unmanaged plugins and plugin configuration files.
+  if $purge_configs {
+    file { ["${config_root}/plugins", "${config_root}/plugin-conf.d" ]:
+      ensure  => directory,
+      recurse => true,
+      purge   => true,
+    }
+  }
+
 }
diff --git a/manifests/params/node.pp b/manifests/params/node.pp
index cdd14e3..f5fd490 100644
--- a/manifests/params/node.pp
+++ b/manifests/params/node.pp
@@ -1,74 +1,75 @@
 class munin::params::node {
 
   $message = "Unsupported osfamily: ${::osfamily}"
 
   $address        = $::fqdn
   $host_name      = $::fqdn
   $allow          = []
   $masterconfig   = []
   $mastergroup    = undef
   $mastername     = undef
   $nodeconfig     = []
   $plugins        = {}
   $service_ensure = undef
   $export_node    = 'enabled'
   $log_file       = 'munin-node.log'
   $log_destination = 'file'
   $syslog_ident    = undef
   $syslog_facility = undef
+  $purge_configs   = false
 
   case $::osfamily {
     'RedHat': {
       $config_root  = '/etc/munin'
       $log_dir      = '/var/log/munin-node'
       $service_name = 'munin-node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/share/munin/plugins'
       $file_group   = 'root'
     }
     'Debian': {
       $config_root  = '/etc/munin'
       $log_dir      = '/var/log/munin'
       $service_name = 'munin-node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/share/munin/plugins'
       $file_group   = 'root'
     }
     'Solaris': {
       case $::operatingsystem {
         'SmartOS': {
           $config_root  = '/opt/local/etc/munin'
           $log_dir      = '/var/opt/log/munin'
           $service_name = 'smf:/munin-node'
           $package_name = 'munin-node'
           $plugin_share_dir = '/opt/local/share/munin/plugins'
           $file_group   = 'root'
         }
         default: {
           fail("Unsupported operatingsystem ${::operatingsystem} for osfamily ${::osfamily}")
         }
       }
     }
     'FreeBSD', 'DragonFly': {
       $config_root  = '/usr/local/etc/munin'
       $log_dir      = '/var/log/munin'
       $service_name = 'munin-node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/local/share/munin/plugins'
       $file_group   = 'wheel'
     }
     'OpenBSD': {
       $config_root  = '/etc/munin'
       $log_dir      = '/var/log/munin'
       $service_name = 'munin_node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/local/libexec/munin/plugins'
       $file_group   = 'wheel'
     }
     default: {
       fail($message)
     }
   }
 }
 
 
diff --git a/spec/classes/munin_node_spec.rb b/spec/classes/munin_node_spec.rb
index 02c2499..0d856ba 100644
--- a/spec/classes/munin_node_spec.rb
+++ b/spec/classes/munin_node_spec.rb
@@ -1,151 +1,173 @@
 require 'spec_helper'
 
 describe 'munin::node' do
 
   on_supported_os.each do |os, facts|
     context "on #{os}" do
       let(:facts) do
         facts
       end
 
       it { should compile.with_all_deps }
 
       it { should contain_package('munin-node') }
 
       case facts[:osfamily]
       when 'Solaris'
         munin_confdir = '/opt/local/etc/munin'
       when 'FreeBSD', 'DragonFly'
         munin_confdir = '/usr/local/etc/munin'
       else
         munin_confdir = '/etc/munin'
       end
 
       munin_node_conf = "#{munin_confdir}/munin-node.conf"
       munin_plugin_dir = "#{munin_confdir}/plugins"
       munin_plugin_conf_dir = "#{munin_confdir}/plugin-conf.d"
 
       case facts[:osfamily]
       when 'Solaris'
         munin_node_service = 'smf:/munin-node'
       else
         munin_node_service = 'munin-node'
       end
 
       case facts[:osfamily]
       when 'Solaris'
         log_dir = '/var/opt/log/munin'
       when 'RedHat'
         log_dir = '/var/log/munin-node'
       else
         log_dir = '/var/log/munin'
       end
 
       it { should contain_service(munin_node_service) }
       it { should contain_file(munin_node_conf) }
 
       context 'with no parameters' do
         it { should compile.with_all_deps }
         it do
           should contain_service(munin_node_service)
                   .without_ensure()
         end
         it do
           should contain_file(munin_node_conf)
                   .with_content(/host_name\s+foo.example.com/)
                   .with_content(/log_file\s+#{log_dir}\/munin-node.log/)
         end
       end
 
       context 'with parameter allow' do
         let(:params) do
           { allow: ['2001:db8:1::',
                     '2001:db8:2::/64',
                     '192.0.2.129',
                     '192.0.2.0/25',
                     '192\.0\.2']
           }
         end
         it { should compile.with_all_deps }
         it do
           should contain_file('/etc/munin/munin-node.conf')
                   .with_content(/^cidr_allow 192.0.2.0\/25$/)
                   .with_content(/^cidr_allow 2001:db8:2::\/64$/)
                   .with_content(/^allow \^192\\.0\\.2\\.129\$$/)
                   .with_content(/^allow 192\\.0\\.2$/)
                   .with_content(/^allow \^2001:db8:1::\$$/)
         end
       end
 
       context 'with parameter host_name' do
         let(:params) do
           { host_name: 'something.example.com' }
         end
         it { should compile.with_all_deps }
         it do
           should contain_file('/etc/munin/munin-node.conf')
                   .with_content(/host_name\s+something.example.com/)
         end
       end
 
       context 'with parameter service_ensure' do
         let(:params) do
           { service_ensure: 'running' }
         end
         it { should compile.with_all_deps }
         it do
           should contain_service('munin-node')
             .with_ensure('running')
         end
       end
 
       context 'logging to syslog' do
         context 'defaults' do
           let(:params) do
             { log_destination: 'syslog' }
           end
           it{ should compile.with_all_deps }
           it do
             should contain_file(munin_node_conf)
                     .with_content(/log_file\s+Sys::Syslog/)
           end
         end
 
         context 'with syslog options' do
           let(:params) do
             { log_destination: 'syslog',
               syslog_ident: 'munin-granbusk',
               syslog_facility: 'local1',
             }
           end
           it{ should compile.with_all_deps }
           it do
             should contain_file(munin_node_conf)
                     .with_content(/log_file\s+Sys::Syslog/)
                     .with_content(/syslog_ident\s+"munin-granbusk"/)
                     .with_content(/syslog_facility\s+local1/)
           end
         end
 
         context 'with syslog_facility set to wrong value ' do
           let(:params) do
             { log_destination: 'syslog',
               syslog_facility: 'wrong',
             }
           end
           it { expect { should compile.with_all_deps }.to raise_error(/validate_re/) }
         end
       end
+
+      context 'purge_configs' do
+        context 'set' do
+          let(:params) { { purge_configs: true } }
+          it { should compile.with_all_deps }
+          it do should contain_file(munin_plugin_dir)
+                        .with_ensure('directory')
+                        .with_recurse(true)
+                        .with_purge(true)
+          end
+          it do should contain_file(munin_plugin_conf_dir)
+                        .with_ensure('directory')
+                        .with_recurse(true)
+                        .with_purge(true)
+          end
+        end
+        context 'unset' do
+          it { should compile.with_all_deps }
+          it { should_not contain_file(munin_plugin_dir) }
+          it { should_not contain_file(munin_plugin_conf_dir) }
+        end
+      end
     end
   end
 
   context 'unsupported' do
     include_context :unsupported
     it {
       expect {
         should contain_class('munin::node')
       }.to raise_error(Puppet::Error, /Unsupported osfamily/)
     }
   end
 
 end