Add zaqar::server_instance class.

This class manages N instances of zaqar-server each using an
alternate /etc/zaqar/n.conf file to control select service
settings which take priority over settings in /etc/zaqar/zaqar.conf.

The primary use case for this class would be to enable websockets
alongside of wsgi. The only way to do this with Zaqar today is
to run multiple processes.

Change-Id: Ib730206ece73efe57aca7df4a65c906e95cdd606

manifests/server_instance.pp

@@ -0,0 +1,43 @@
+# = Class: zaqar::server_instance
+#
+# This class manages N instances of zaqar-server each using an
+# alternate /etc/zaqar/n.conf file to control select service
+# settings which take priority over settings in /etc/zaqar/zaqar.conf.
+#
+# [*transport*]
+#  Set to either 'wsgi' or 'websocket'. Required.
+#
+# [*enabled*]
+#   (Optional) Service enable state for zaqar-server.
+#   Defaults to true
+#
+define zaqar::server_instance(
+  $transport,
+  $enabled = true,
+) {
+
+  if $enabled {
+    $service_ensure = 'running'
+  } else {
+    $service_ensure = 'stopped'
+  }
+
+  file { "/etc/zaqar/${name}.conf":
+    ensure  => file,
+    content => template('zaqar/zaqar.conf.erb'),
+  }
+
+  include ::zaqar
+  include ::zaqar::params
+
+  service { "openstack-zaqar@${name}":
+    ensure => $service_ensure,
+    enable => $enabled,
+  }
+
+  Package[$::zaqar::params::package_name] ~> Service["${::zaqar::params::service_name}@${name}"]
+  Package[$::zaqar::params::package_name] ~> File["/etc/zaqar/${name}.conf"]
+  File["/etc/zaqar/${name}.conf"] ~> Service["${::zaqar::params::service_name}@${name}"]
+  Zaqar_config<||> ~> Service["${::zaqar::params::service_name}@${name}"]
+
+}

spec/classes/zaqar_server_instance_spec.rb

@@ -0,0 +1,26 @@
+require 'spec_helper'
+describe 'zaqar' do
+
+  let :pre_condition do
+    "zaqar::server_instance{ '1': transport => 'websocket' }"
+  end
+
+  let :facts do
+    { :osfamily => 'RedHat' }
+  end
+
+  let :params do
+    { :admin_password => 'foo' }
+  end
+
+  describe 'with a websocket server instance 1' do
+
+    it { is_expected.to contain_service('openstack-zaqar@1').with(
+        :ensure => 'running',
+        :enable => true
+    )}
+    it {is_expected.to contain_file('/etc/zaqar/1.conf') }
+
+  end
+
+end

templates/zaqar.conf.erb

@@ -0,0 +1,2 @@
+[drivers]
+transport=<%= @transport %>