Add support for redis message store

This adds new class to setup redis as the messaging backend.

Change-Id: I0ef259f2dfcc661a30b5a55c23eac3eb1240f462

manifests/messaging/redis.pp

@@ -0,0 +1,31 @@
+# == class: zaqar::messaging::redis
+#
+# [*uri*]
+#   Redis Connection URI. Required.
+#
+# [*max_reconnect_attempts*]
+#   Maximum number of times to retry an operation that failed due to a
+#   primary node failover. (integer value)
+#   Defaults to $::os_service_default.
+#
+# [*reconnect_sleep*]
+#   Base sleep interval between attempts to reconnect after a primary
+#   node failover. The actual sleep time increases exponentially (power
+#   of 2) each time the operation is retried. (floating point value)
+#   Defaults to $::os_service_default.
+#
+class zaqar::messaging::redis(
+  $uri,
+  $max_reconnect_attempts = $::os_service_default,
+  $reconnect_sleep        = $::os_service_default,
+) {
+
+  include ::zaqar::deps
+
+  zaqar_config {
+    'drivers:message_store:redis/uri':                    value => $uri, secret => true;
+    'drivers:message_store:redis/max_reconnect_attempts': value => $max_reconnect_attempts;
+    'drivers:message_store:redis/reconnect_sleep':        value => $reconnect_sleep;
+  }
+
+}

releasenotes/notes/redis_support-8a25b7ec5975e501.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Support using Redis as message store.

spec/classes/zaqar_messaging_redis_spec.rb

@@ -0,0 +1,64 @@
+require 'spec_helper'
+
+describe 'zaqar::messaging::redis' do
+
+  shared_examples_for 'zaqar::messaging::redis' do
+    let :pre_condition do
+      "class { '::zaqar::keystone::authtoken':
+         password =>'foo',
+       }
+       class { '::zaqar':
+         message_store =>'redis',
+       }"
+
+    end
+    let :req_params do
+      {
+        :uri   => 'redis://127.0.0.1:6379',
+      }
+    end
+
+    describe 'with only required params' do
+      let :params do
+        req_params
+      end
+
+      it 'should config redis messaging driver' do
+        is_expected.to contain_zaqar_config('drivers/message_store').with(
+         :value => 'redis'
+        )
+        is_expected.to contain_zaqar_config('drivers:message_store:redis/uri').with(
+         :value => 'redis://127.0.0.1:6379'
+        )
+      end
+
+    end
+
+    describe 'with custom values' do
+      let :params do
+        req_params.merge!({
+          :max_reconnect_attempts => '4',
+          :reconnect_sleep => '5',
+        })
+      end
+
+      it 'configures custom values' do
+        is_expected.to contain_zaqar_config('drivers:message_store:redis/max_reconnect_attempts').with_value('4')
+        is_expected.to contain_zaqar_config('drivers:message_store:redis/reconnect_sleep').with_value('5')
+      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_configures 'zaqar::messaging::redis'
+    end
+  end
+end
+