Add Panko expirer class

This sets up a cron task to run periodically and
expire panko events in db.

Change-Id: I23359239008105cd77a599d2c08c067f132099b7
Partial-Bug: #1746514

manifests/expirer.pp

@@ -0,0 +1,60 @@
+#
+# == Class: panko::expirer
+#
+# Setups Panko Expirer service to enable TTL feature.
+#
+# === Parameters
+#
+#  [*enable_cron*]
+#    (optional) Whether to configure a crontab entry to run the expiry.
+#    When set to False, Puppet will try to remove the crontab.
+#    Defaults to true.
+#
+#  [*minute*]
+#    (optional) Defaults to '1'.
+#
+#  [*hour*]
+#    (optional) Defaults to '0'.
+#
+#  [*monthday*]
+#    (optional) Defaults to '*'.
+#
+#  [*month*]
+#    (optional) Defaults to '*'.
+#
+#  [*weekday*]
+#    (optional) Defaults to '*'.
+#
+class panko::expirer (
+  $enable_cron = true,
+  $minute      = 1,
+  $hour        = 0,
+  $monthday    = '*',
+  $month       = '*',
+  $weekday     = '*',
+) {
+
+  include ::panko::params
+  include ::panko::deps
+
+  Anchor['panko::install::end'] ~> Class['panko::expirer']
+
+  if $enable_cron {
+    $ensure = 'present'
+  } else {
+    $ensure = 'absent'
+  }
+
+  cron { 'panko-expirer':
+    ensure      => $ensure,
+    command     => $panko::params::expirer_command,
+    environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
+    user        => 'panko',
+    minute      => $minute,
+    hour        => $hour,
+    monthday    => $monthday,
+    month       => $month,
+    weekday     => $weekday
+  }
+
+}

manifests/params.pp

@@ -4,6 +4,7 @@ class panko::params {
   include ::openstacklib::defaults
   $client_package_name = 'python-pankoclient'
   $group               = 'panko'
+  $expirer_command     = 'panko-expirer'
 
   case $::osfamily {
     'RedHat': {

releasenotes/notes/add-expirer-class-080c2b7a43abcd0d.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Add panko expirer class so we can configure it in crontab accordingly.

spec/classes/panko_expirer_spec.rb

@@ -0,0 +1,53 @@
+#
+# Unit tests for panko::expirer
+#
+
+require 'spec_helper'
+
+describe 'panko::expirer' do
+
+  shared_examples_for 'panko-expirer' do
+
+    it { is_expected.to contain_class('panko::deps') }
+    it { is_expected.to contain_class('panko::params') }
+
+    let :params do
+        { }
+    end
+
+    it 'configures a cron' do
+      is_expected.to contain_cron('panko-expirer').with(
+        :ensure      => 'present',
+        :command     => 'panko-expirer',
+        :environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
+        :user        => 'panko',
+        :minute      => 1,
+        :hour        => 0,
+        :monthday    => '*',
+        :month       => '*',
+        :weekday     => '*'
+      )
+    end
+
+    context 'with cron not enabled' do
+      before do
+        params.merge!({
+          :enable_cron => false })
+      end
+      it {
+        is_expected.to contain_cron('panko-expirer').with(
+          :ensure      => 'absent',
+          :command     => 'panko-expirer',
+          :environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
+          :user        => 'panko',
+          :minute      => 1,
+          :hour        => 0,
+          :monthday    => '*',
+          :month       => '*',
+          :weekday     => '*'
+        )
+      }
+    end
+
+  end
+end