Report DF metrics as percentage too

This change includes a workaround for a bug [1] found in the upstream
puppet-collectd module.

[1] voxpupuli/puppet-collectd#162

Change-Id: I560e0436cfefb026d2c7a979091208a399bbe2fd

deployment_scripts/puppet/modules/lma_collector/files/plugins/decoders/collectd.lua

@@ -86,6 +86,10 @@ function process_message ()
                 local entity
                 if sample['type'] == 'df_inodes' then
                     entity = 'inodes'
+                elseif sample['type'] == 'percent_inodes' then
+                    entity = 'inodes_percent'
+                elseif sample['type'] == 'percent_bytes' then
+                    entity = 'space_percent'
                 else -- sample['type'] == 'df_complex'
                     entity = 'space'
                 end

deployment_scripts/puppet/modules/lma_collector/lib/facter/collectd_version.rb

@@ -0,0 +1,28 @@
+#    Copyright 2015 Mirantis, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+# Workaround because the puppet-collectd module cannot detect the collectd's
+# version until the package is installed.
+#
+# See https://github.com/pdxcat/puppet-module-collectd/issues/162 for details.
+Facter.add("collectd_version") do
+    setcode do
+        case Facter.value('osfamily')
+        when /(?i)(debian)/
+            "5.4.0-3ubuntu2"
+        when /(?i)(redhat)/
+            "5.4.1-5.mira1.mira1"
+        end
+    end
+end

deployment_scripts/puppet/modules/lma_collector/manifests/collectd/base.pp

@@ -64,7 +64,8 @@
 
   # TODO: pass this list as a parameter or add a custom fact
   class { 'collectd::plugin::df':
-    mountpoints => ['/', '/boot'],
+    mountpoints       => ['/', '/boot'],
+    valuespercentage  => true,
   }
 
   $block_devices = join(split($::blockdevices, ','), '|')