Add support for aodh-expirer cron job

Change-Id: I8c0e806112b947fccc6b0a6e47c3e0d3722a3e84

manifests/expirer.pp

@@ -0,0 +1,65 @@
+#
+# == Class: aodh::expirer
+#
+# Setups Aodh Expirer service to enable TTL feature.
+#
+# === Parameters
+#
+#  [*ensure*]
+#    (optional) The state of cron job.
+#    Defaults to present.
+#
+#  [*minute*]
+#    (optional) Defaults to '1'.
+#
+#  [*hour*]
+#    (optional) Defaults to '0'.
+#
+#  [*monthday*]
+#    (optional) Defaults to '*'.
+#
+#  [*month*]
+#    (optional) Defaults to '*'.
+#
+#  [*weekday*]
+#    (optional) Defaults to '*'.
+#
+#  [*maxdelay*]
+#    (optional) In Seconds. Should be a positive integer.
+#    Induces a random delay before running the cronjob to avoid running
+#    all cron jobs at the same time on all hosts this job is configured.
+#    Defaults to 0.
+#
+class aodh::expirer (
+  $ensure   = 'present',
+  $minute   = 1,
+  $hour     = 0,
+  $monthday = '*',
+  $month    = '*',
+  $weekday  = '*',
+  $maxdelay = 0,
+) {
+
+  include aodh::params
+  include aodh::deps
+
+  if $maxdelay == 0 {
+    $sleep = ''
+  } else {
+    $sleep = "sleep `expr \${RANDOM} \\% ${maxdelay}`; "
+  }
+
+  cron { 'aodh-expirer':
+    ensure      => $ensure,
+    command     => "${sleep}${aodh::params::expirer_command}",
+    environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
+    user        => 'aodh',
+    minute      => $minute,
+    hour        => $hour,
+    monthday    => $monthday,
+    month       => $month,
+    weekday     => $weekday,
+    require     => Anchor['aodh::install::end'],
+  }
+
+}

manifests/params.pp

@@ -6,6 +6,7 @@ class aodh::params {
 
   $client_package_name = "python${pyvers}-aodhclient"
   $group               = 'aodh'
+  $expirer_command     = 'aodh-expirer'
 
   case $::osfamily {
     'RedHat': {

releasenotes/notes/expirer-a53e68fe61ff3f17.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The new ``aodh::expirer`` class has been added to support a cron job to run
+    aodh-expirer command.

spec/classes/aodh_expirer_spec.rb

@@ -0,0 +1,65 @@
+require 'spec_helper'
+
+describe 'aodh::expirer' do
+  shared_examples 'aodh::expirer' do
+    let :params do
+      {}
+    end
+
+    context 'with default' do
+      it { is_expected.to contain_class('aodh::deps') }
+      it { is_expected.to contain_class('aodh::params') }
+
+      it { is_expected.to contain_cron('aodh-expirer').with(
+        :ensure      => 'present',
+        :command     => 'aodh-expirer',
+        :environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
+        :user        => 'aodh',
+        :minute      => 1,
+        :hour        => 0,
+        :monthday    => '*',
+        :month       => '*',
+        :weekday     => '*',
+        :require     => 'Anchor[aodh::install::end]'
+      )}
+    end
+
+    context 'with overridden parameters' do
+      before do
+        params.merge!(
+          :ensure   => 'absent',
+          :maxdelay => 300
+        )
+      end
+
+      it { is_expected.to contain_class('aodh::deps') }
+      it { is_expected.to contain_class('aodh::params') }
+
+      it { is_expected.to contain_cron('aodh-expirer').with(
+        :ensure      => 'absent',
+        :command     => 'sleep `expr ${RANDOM} \\% 300`; aodh-expirer',
+        :environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
+        :user        => 'aodh',
+        :minute      => 1,
+        :hour        => 0,
+        :monthday    => '*',
+        :month       => '*',
+        :weekday     => '*',
+        :require     => 'Anchor[aodh::install::end]'
+      )}
+    end
+
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      it_behaves_like 'aodh::expirer'
+    end
+  end
+end