Refactor collectd/gnocchi integration

Current implementation of collect_gnocchi plugin configuration blocks
usage of other python-based plugins. This patch leverages puppet-collectd
classes properly to enable configuration of more than one python-based
plugin together.

Change-Id: I248859bf0e4b70e3a057e96b5fb74be64f4008ed

manifests/profile/base/metrics/collectd.pp

@@ -188,6 +188,11 @@
 #  The 'address' value concatenated with the 'name' given will be used
 #  as the send-to address for communications over the messaging link.
 #  Defaults to {}.
+#
+# [*python_read_plugins*]
+#  (Optional) List of strings. List of third party python packages to install.
+#  Defaults to [].
+#
 class tripleo::profile::base::metrics::collectd (
   $step = Integer(hiera('step')),
 
@@ -227,12 +232,20 @@ class tripleo::profile::base::metrics::collectd (
   $amqp_retry_delay = undef,
   $amqp_interval = undef,
   $service_names = hiera('service_names', []),
-  $collectd_manage_repo = false
+  $collectd_manage_repo = false,
+  $python_read_plugins = []
 ) {
   if $step >= 3 {
     class {'::collectd':
       manage_repo => $collectd_manage_repo
     }
+
+    include ::collectd::plugin::python
+    $python_packages = concat(['collectd-python'], $python_read_plugins)
+    package { $python_packages:
+      ensure => 'present'
+    }
+
     if $enable_file_logging {
       include ::collectd::plugin::logfile
     }

manifests/profile/base/metrics/collectd/gnocchi.pp

@@ -139,14 +139,39 @@ define tripleo::profile::base::metrics::collectd::gnocchi (
 ) {
   include ::collectd
 
-  package { ['python-collectd-gnocchi', 'collectd-python']:
+  package { 'python-collectd-gnocchi':
     ensure => $ensure,
   }
 
-  collectd::plugin { 'python':
-    ensure  => $ensure,
-    order   => $order,
-    content => template('tripleo/collectd/collectd-gnocchi.conf.erb'),
-    require => Package['python-collectd-gnocchi']
+  $_conf = {'Auth_Mode' => $auth_mode, 'ResourceType' => $resource_type, 'BatchSize' => $batch_size}
+  if $auth_mode == 'basic' {
+    $conf = merge($_conf, {
+      'Endpoint' => "${protocol}://${server}:${port}",
+      'User' => $user
+    })
+  } elsif $auth_mode == 'keystone' {
+    $conf = merge($_conf, {
+      'Auth_Url' => $keystone_auth_url,
+      'Username' => $keystone_user_name,
+      'User_Id' => $keystone_user_id,
+      'Project_Id' => $keystone_project_id,
+      'Project_Name' => $keystone_project_name,
+      'Password' => $keystone_password,
+      'User_Domain_Id' => $keystone_user_domain_id,
+      'User_Domain_Name' => $keystone_user_domain_name,
+      'Project_Domain_Id' => $keystone_project_domain_id,
+      'Project_Domain_Name' => $keystone_project_domain_name,
+      'Region_Name' => $keystone_region_name,
+      'Interface' => $keystone_interface,
+      'Endpoint' => $keystone_endpoint
+    })
+  } else {
+    fail('Invalid auth mode for collect_gnocchi plugin.')
   }
+
+  $config = $conf.filter |$key, $value| { $value != undef }
+  ::collectd::plugin::python::module { 'collectd_gnocchi':
+    config => [$config]
+  }
+
 }

templates/collectd/collectd-gnocchi.conf.erb

@@ -1,62 +0,0 @@
-<Plugin "python">
-  Import "collectd_gnocchi"
-  <Module "collectd_gnocchi">
-<%- if @auth_mode == 'basic' %>
-    ### Basic authentication
-    Endpoint "<%= @protocol %>://<%= @server %>:<%= @port %>"
-    <%- if @user %>
-    User "<%= @user %>"
-    <%- end -%>
-<%- elsif @auth_mode == 'keystone' %>
-    ### Keystone authentication
-    Auth_Mode "keystone"
-    Auth_Url "<%= @keystone_auth_url %>"
-    <%- if @keystone_user_name %>
-    Username "<%= @keystone_user_name %>"
-    <%- end -%>
-    <%- if @keystone_user_id %>
-    User_Id "<%= @keystone_user_id %>"
-    <%- end -%>
-    <%- if @keystone_project_id %>
-    Project_Id "<%= @keystone_project_id %>"
-    <%- end -%>
-    <%- if @keystone_project_name %>
-    Project_Name "<%= @keystone_project_name %>"
-    <%- end -%>
-    <%- if @keystone_password %>
-    Password "<%= @keystone_password %>"
-    <%- end -%>
-    <%- if @keystone_user_domain_id %>
-    User_Domain_Id "<%= @keystone_user_domain_id %>"
-    <%- end -%>
-    <%- if @keystone_user_domain_name %>
-    User_Domain_Name "<%= @keystone_user_domain_name %>"
-    <%- end -%>
-    <%- if @keystone_project_domain_id %>
-    Project_Domain_Id "<%= @keystone_project_domain_id %>"
-    <%- end -%>
-    <%- if @keystone_project_domain_name %>
-    Project_Domain_Name "<%= @keystone_project_domain_name %>"
-    <%- end -%>
-    <%- if @keystone_region_name %>
-    Region_Name "<%= @keystone_region_name %>"
-    <%- end -%>
-    <%- if @keystone_interface %>
-    Interface "<%= @keystone_interface %>"
-    <%- end -%>
-    <%- if @keystone_endpoint %>
-    Endpoint "<%= @keystone_endpoint %>"
-    <%- end -%>
-<%- end -%>
-
-<%- if @resource_type %>
-    ## Default resource type created by the plugin in Gnocchi
-    ## to store hosts
-    ResourceType "<%= @resource_type %>"
-<%- end -%>
-<%- if @batch_size %>
-    ## Minimum number of values to batch
-    BatchSize <%= @batch_size %>
-<%- end -%>
-  </Module>
-</Plugin>