Add defined type to manage plugin packages

Sahara has separate plugin packages according to the software used in
the data processing cluster, and in Ubuntu we have to install
the required plugin packages additionally.

This introduces the defined resource type which can be used to manage
plugin packages.

Change-Id: I224a5e32bd20aa86e14d738efd80d88ff9505a39

manifests/params.pp

@@ -18,6 +18,7 @@ class sahara::params {
       $engine_service_name       = 'openstack-sahara-engine'
       $sahara_wsgi_script_path   = '/var/www/cgi-bin/sahara'
       $sahara_wsgi_script_source = '/usr/bin/sahara-wsgi-api'
+      $plugin_package_name_base  = 'python3-sahara-plugin-'
     }
     'Debian': {
       $common_package_name       = 'sahara-common'
@@ -27,6 +28,7 @@ class sahara::params {
       $engine_service_name       = 'sahara-engine'
       $sahara_wsgi_script_path   = '/usr/lib/cgi-bin/sahara'
       $sahara_wsgi_script_source = '/usr/bin/sahara-wsgi-api'
+      $plugin_package_name_base  = 'python3-sahara-plugin-'
     }
     default: {
       fail("Unsupported osfamily: ${facts['os']['family']}")

manifests/plugin.pp

@@ -0,0 +1,23 @@
+# == Define: sahara::plugin
+#
+#  Sahara plugin configuration
+#
+# === Parameters
+#
+# [*package_ensure*]
+#   (Optional) Ensure state for package
+#   Defaults to 'present'.
+#
+define sahara::plugin(
+  $package_ensure = 'present',
+) {
+
+  include sahara::deps
+  include sahara::params
+
+  package { "sahara-plugin-${name}":
+    ensure => $package_ensure,
+    name   => "${::sahara::params::plugin_package_name_base}${name}",
+    tag    => ['openstack', 'sahara-package'],
+  }
+}

releasenotes/notes/plugin-7754b64caa4a80cc.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The new ``sahara::plugin`` defined resource type has been added. This can
+    be used to manage plugin packages.

spec/defines/sahara_plugin_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+describe 'sahara::plugin' do
+  let(:title) {'vanilla'}
+
+  shared_examples_for 'sahara::plugin' do
+
+    context 'with default parameters' do
+
+      it 'installs the plugin package' do
+        is_expected.to contain_package('sahara-plugin-vanilla').with(
+          :ensure => 'present',
+          :name   => 'python3-sahara-plugin-vanilla',
+          :tag    => ['openstack', 'sahara-package'],
+        )
+      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 'sahara::plugin'
+    end
+  end
+
+end