Add glance-cache-cleaner and glance-cache-pruner

* glance::cache::cleaner: Installs a cron job to remove stalled and
  invalid cached images.
* glance::cache::pruner: Installs a cron job to keep the image cache
  at or below the maximum cache size.

Change-Id: I99cb1809446f1a1126454ff5fa5bdceb8044ee28

manifests/cache/cleaner.pp

@@ -0,0 +1,42 @@
+# == Class: glance::cache::cleaner
+#
+# Installs a cron job to run glance-cache-cleaner.
+#
+# === Parameters
+#
+#  [*minute*]
+#    (optional) Defaults to '1'.
+#
+#  [*hour*]
+#    (optional) Defaults to '0'.
+#
+#  [*monthday*]
+#    (optional) Defaults to '*'.
+#
+#  [*month*]
+#    (optional) Defaults to '*'.
+#
+#  [*weekday*]
+#    (optional) Defaults to '*'.
+#
+class glance::cache::cleaner (
+  $minute   = 1,
+  $hour     = 0,
+  $monthday = '*',
+  $month    = '*',
+  $weekday  = '*',
+) {
+
+  include glance::params
+
+  cron { 'glance-cache-cleaner':
+    command     => $glance::params::cache_cleaner_command,
+    environment => 'PATH=/bin:/usr/bin:/usr/sbin',
+    user        => 'glance',
+    minute      => $minute,
+    hour        => $hour,
+    monthday    => $monthday,
+    month       => $month,
+    weekday     => $weekday
+  }
+}

manifests/cache/pruner.pp

@@ -0,0 +1,42 @@
+# == Class: glance::cache::pruner
+#
+# Installs a cron job to run glance-cache-pruner.
+#
+# === Parameters
+#
+#  [*minute*]
+#    (optional) Defaults to '*/30'.
+#
+#  [*hour*]
+#    (optional) Defaults to '*'.
+#
+#  [*monthday*]
+#    (optional) Defaults to '*'.
+#
+#  [*month*]
+#    (optional) Defaults to '*'.
+#
+#  [*weekday*]
+#    (optional) Defaults to '*'.
+#
+class glance::cache::pruner (
+  $minute   = '*/30',
+  $hour     = '*',
+  $monthday = '*',
+  $month    = '*',
+  $weekday  = '*',
+) {
+
+  include glance::params
+
+  cron { 'glance-cache-pruner':
+    command     => $glance::params::cache_pruner_command,
+    environment => 'PATH=/bin:/usr/bin:/usr/sbin',
+    user        => 'glance',
+    minute      => $minute,
+    hour        => $hour,
+    monthday    => $monthday,
+    month       => $month,
+    weekday     => $weekday
+  }
+}

manifests/params.pp

@@ -5,6 +5,9 @@ class glance::params {
   $client_package_name = 'python-glanceclient'
   $pyceph_package_name = 'python-ceph'
 
+  $cache_cleaner_command = 'glance-cache-cleaner'
+  $cache_pruner_command  = 'glance-cache-pruner'
+
   case $::osfamily {
     'RedHat': {
       $package_name          = 'openstack-glance'

spec/classes/glance_cache_cleaner_spec.rb

@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+describe 'glance::cache::cleaner' do
+
+  let :facts do
+    { :osfamily => 'Debian' }
+  end
+
+  it 'configures a cron' do
+    should contain_cron('glance-cache-cleaner').with(
+      :command     => 'glance-cache-cleaner',
+      :environment => 'PATH=/bin:/usr/bin:/usr/sbin',
+      :user        => 'glance',
+      :minute      => 1,
+      :hour        => 0,
+      :monthday    => '*',
+      :month       => '*',
+      :weekday     => '*'
+    )
+  end
+end

spec/classes/glance_cache_pruner_spec.rb

@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+describe 'glance::cache::pruner' do
+
+  let :facts do
+    { :osfamily => 'Debian' }
+  end
+
+  it 'configures a cron' do
+    should contain_cron('glance-cache-pruner').with(
+      :command     => 'glance-cache-pruner',
+      :environment => 'PATH=/bin:/usr/bin:/usr/sbin',
+      :user        => 'glance',
+      :minute      => '*/30',
+      :hour        => '*',
+      :monthday    => '*',
+      :month       => '*',
+      :weekday     => '*'
+    )
+  end
+end