Implement Listener service

* Manifest
* Unit tests
* Acceptance tests
* Example manifest

Change-Id: Ib4a65547fee27f1d7dedf0c508ef544a5347b2e6

examples/aodh.pp

@@ -14,4 +14,5 @@ class { '::aodh::auth':
 }
 class { '::aodh::evaluator': }
 class { '::aodh::notifier': }
+class { '::aodh::listener': }
 class { '::aodh::client': }

manifests/listener.pp

@@ -0,0 +1,48 @@
+# Installs the aodh listener service
+#
+# == Params
+#  [*enabled*]
+#    (optional) Should the service be enabled.
+#    Defaults to true.
+#
+#  [*manage_service*]
+#    (optional)  Whether the service should be managed by Puppet.
+#    Defaults to true.
+#
+#  [*package_ensure*]
+#    (optional) ensure state for package.
+#    Defaults to 'present'
+#
+class aodh::listener (
+  $manage_service = true,
+  $enabled        = true,
+  $package_ensure = 'present',
+) {
+
+  include ::aodh::params
+
+  Aodh_config<||> ~> Service['aodh-listener']
+
+  Package[$::aodh::params::listener_package_name] -> Service['aodh-listener']
+  ensure_resource( 'package', [$::aodh::params::listener_package_name],
+    { ensure => $package_ensure }
+  )
+
+  if $manage_service {
+    if $enabled {
+      $service_ensure = 'running'
+    } else {
+      $service_ensure = 'stopped'
+    }
+  }
+
+  Package['aodh'] -> Service['aodh-listener']
+  service { 'aodh-listener':
+    ensure     => $service_ensure,
+    name       => $::aodh::params::listener_service_name,
+    enable     => $enabled,
+    hasstatus  => true,
+    hasrestart => true,
+    tag        => 'aodh-service',
+  }
+}

spec/acceptance/aodh_wsgi_apache_spec.rb

@@ -125,6 +125,7 @@ describe 'basic aodh' do
       }
       class { '::aodh::client': }
       class { '::aodh::notifier': }
+      class { '::aodh::listener': }
       case $::osfamily {
         'Debian': {
           warning('aodh-evaluator cannot be run on ubuntu system, package is broken. See LP#1508463')

spec/classes/aodh_listener_spec.rb

@@ -0,0 +1,98 @@
+require 'spec_helper'
+# LP1492636 - Cohabitation of compile matcher and webmock
+WebMock.disable_net_connect!(:allow => "169.254.169.254")
+
+describe 'aodh::listener' do
+
+  let :pre_condition do
+    "class { '::aodh': }"
+  end
+
+  shared_examples_for 'aodh-listener' do
+
+    context 'when enabled' do
+      it { is_expected.to contain_class('aodh::params') }
+
+      it 'installs aodh-listener package' do
+        is_expected.to contain_package(platform_params[:listener_package_name]).with(
+          :ensure => 'present'
+        )
+      end
+
+      it 'configures aodh-listener service' do
+        is_expected.to contain_service('aodh-listener').with(
+          :ensure     => 'running',
+          :name       => platform_params[:listener_service_name],
+          :enable     => true,
+          :hasstatus  => true,
+          :hasrestart => true,
+          :tag        => 'aodh-service',
+        )
+      end
+
+    end
+
+    context 'when disabled' do
+      let :params do
+        { :enabled => false }
+      end
+
+      # Catalog compilation does not crash for lack of aodh::db
+      it { is_expected.to compile }
+      it 'configures aodh-listener service' do
+        is_expected.to contain_service('aodh-listener').with(
+          :ensure     => 'stopped',
+          :name       => platform_params[:listener_service_name],
+          :enable     => false,
+          :hasstatus  => true,
+          :hasrestart => true,
+          :tag        => 'aodh-service',
+        )
+      end
+    end
+
+    context 'when service management is disabled' do
+      let :params do
+        { :enabled        => false,
+          :manage_service => false }
+      end
+
+      it 'configures aodh-listener service' do
+        is_expected.to contain_service('aodh-listener').with(
+          :ensure     => nil,
+          :name       => platform_params[:listener_service_name],
+          :enable     => false,
+          :hasstatus  => true,
+          :hasrestart => true,
+          :tag        => 'aodh-service',
+        )
+      end
+    end
+  end
+
+  context 'on Debian platforms' do
+    let :facts do
+      { :osfamily => 'Debian' }
+    end
+
+    let :platform_params do
+      { :listener_package_name => 'aodh-listener',
+        :listener_service_name => 'aodh-listener' }
+    end
+
+    it_configures 'aodh-listener'
+  end
+
+  context 'on RedHat platforms' do
+    let :facts do
+      { :osfamily => 'RedHat' }
+    end
+
+    let :platform_params do
+      { :listener_package_name => 'openstack-aodh-listener',
+        :listener_service_name => 'openstack-aodh-listener' }
+    end
+
+    it_configures 'aodh-listener'
+  end
+end