sfc: Accept array for drivers

The drivers option in networking-sfc both accept list values, which
defines ordered lists of drivers.

Change-Id: Iecc9cfda8bd74c758b4dbf433fed2ea293725afd
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

manifests/services/sfc.pp

@@ -25,12 +25,12 @@
 #   Whether to install the sfc extension package
 #   Default to 'present'
 #
-# [*sfc_driver*]
+# [*sfc_drivers*]
-#   (optional) SFC driver to use
+#   (optional) An ordered list of service chain drivers
 #   Defaults to $facts['os_service_default']
 #
-# [*fc_driver*]
+# [*fc_drivers*]
-#   (optional) Flow classifier driver to use
+#   (optional) An ordered list of flow classifier drivers
 #   Defaults to $facts['os_service_default']
 #
 # [*sync_db*]
@@ -42,17 +42,44 @@
 #   in the sfc config.
 #   Default to false.
 #
+# DEPRECATED PARAMETERS
+#
+# [*sfc_driver*]
+#   (optional) SFC driver to use
+#   Defaults to $facts['os_service_default']
+#
+# [*fc_driver*]
+#   (optional) Flow classifier driver to use
+#   Defaults to $facts['os_service_default']
+#
 class neutron::services::sfc (
   $package_ensure    = 'present',
-  $sfc_driver        = $facts['os_service_default'],
+  $sfc_drivers       = $facts['os_service_default'],
-  $fc_driver         = $facts['os_service_default'],
+  $fc_drivers        = $facts['os_service_default'],
   Boolean $sync_db   = false,
   $purge_config      = false,
+  # DEPRECATED PARAMETERS
+  $sfc_driver        = undef,
+  $fc_driver         = undef,
 ) {
 
   include neutron::deps
   include neutron::params
 
+  if $sfc_driver != undef {
+    warning('The sfc_driver parameter is deprecated. Use the sfc_drivers parameter instead.')
+    $sfc_drivers_real = $sfc_driver
+  } else {
+    $sfc_drivers_real = $sfc_drivers
+  }
+
+  if $fc_driver != undef {
+    warning('The fc_driver parameter is deprecated. Use the fc_drivers parameter instead.')
+    $fc_drivers_real = $fc_driver
+  } else {
+    $fc_drivers_real = $fc_drivers
+  }
+
   package { 'python-networking-sfc':
     ensure => $package_ensure,
     name   => $::neutron::params::sfc_package,
@@ -60,8 +87,8 @@ class neutron::services::sfc (
   }
 
   neutron_sfc_service_config {
-    'sfc/drivers':            value => $sfc_driver;
+    'sfc/drivers':            value => join(any2array($sfc_drivers_real), ',');
-    'flowclassifier/drivers': value => $fc_driver;
+    'flowclassifier/drivers': value => join(any2array($fc_drivers_real), ',');
   }
 
   resources { 'neutron_sfc_service_config':

releasenotes/notes/sfc-drivers-0efd36ce488c3026.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    The ``neutron::servics::sfc::sfc_driver`` parameter has been deprecated,
+    in favor of the new ``sfc_drivers`` parameter.
+
+  - |
+    The ``neutron::servics::sfc::fc_driver`` parameter has been deprecated,
+    in favor of the new ``fc_drivers`` parameter.

spec/classes/neutron_services_sfc_spec.rb

@@ -59,6 +59,20 @@ describe 'neutron::services::sfc' do
     end
 
     context 'with sfc and classifier drivers' do
+      let :params do
+        {
+          :sfc_drivers => 'odl_v2',
+          :fc_drivers  => 'odl_v2'
+        }
+      end
+
+      it 'configures networking-sfc.conf' do
+        should contain_neutron_sfc_service_config('sfc/drivers').with_value('odl_v2')
+        should contain_neutron_sfc_service_config('flowclassifier/drivers').with_value('odl_v2')
+      end
+    end
+
+    context 'with sfc and classifier drivers (deprecated parameters)' do
       let :params do
         {
           :sfc_driver => 'odl_v2',