Deprecate and unset the enabled_drivers option

The classic drivers are being removed, with the removal of pxe_ipmitool
already planned. The enabled_drivers option is deprecated in this change
and is made no-op, since there are no more classic drivers to enable
with it. We also force it to be empty, since the ironic team is planning
on a validate that is not set on ironic-conductor start up.

Change-Id: I6e02f59807c98643923d1c2333fcb25114735f25

manifests/conductor.pp

@@ -27,10 +27,6 @@
 #   (optional) Define if the service must be enabled or not.
 #   Defaults to true.
 #
-# [*enabled_drivers*]
-#  (optional) Array of drivers to load during service initialization.
-#  Defaults to ['pxe_ipmitool'].
-#
 # [*enabled_hardware_types*]
 #  (optional) Array of hardware types to load during service initialization.
 #  Defaults to ['ipmi'].
@@ -140,10 +136,16 @@
 #   so that the baremetal node is in the desired new power state.
 #   Defaults to $::os_service_default
 #
+# DEPRECATED PARAMETERS
+#
+# [*enabled_drivers*]
+#  (optional) Array of drivers to load during service initialization.
+#  Deprecated and does nothing since the classic drivers have been removed.
+#  Defaults to undef
+#
 class ironic::conductor (
   $package_ensure                      = 'present',
   $enabled                             = true,
-  $enabled_drivers                     = ['pxe_ipmitool'],
   $enabled_hardware_types              = ['ipmi'],
   $max_time_interval                   = '120',
   $force_power_state_during_sync       = true,
@@ -165,6 +167,7 @@ class ironic::conductor (
   $provisioning_network_name           = undef,
   $rescuing_network_name               = undef,
   $power_state_change_timeout          = $::os_service_default,
+  $enabled_drivers                     = undef,
 ) {
 
   include ::ironic::deps
@@ -185,7 +188,6 @@ class ironic::conductor (
     fail('rescuing_network_name and rescuing_network can not be specified in the same time.')
   }
 
-  validate_array($enabled_drivers)
   validate_array($enabled_hardware_types)
 
   # NOTE(dtantsur): all in-tree drivers are IPA-based, so it won't hurt
@@ -194,8 +196,7 @@ class ironic::conductor (
 
   # On Ubuntu, ipmitool dependency is missing and ironic-conductor fails to start.
   # https://bugs.launchpad.net/cloud-archive/+bug/1572800
-  if (member($enabled_drivers, 'pxe_ipmitool') or
-      member($enabled_hardware_types, 'ipmi')) and $::osfamily == 'Debian' {
+  if member($enabled_hardware_types, 'ipmi') and $::osfamily == 'Debian' {
     ensure_packages('ipmitool',
       {
         ensure => $package_ensure,
@@ -229,7 +230,8 @@ class ironic::conductor (
 
   # Configure ironic.conf
   ironic_config {
-    'DEFAULT/enabled_drivers':                    value => join($enabled_drivers, ',');
+    # Force removal of the deprecated options to avoid failures. Remove in Stein.
+    'DEFAULT/enabled_drivers':                    ensure => absent;
     'DEFAULT/enabled_hardware_types':             value => join($enabled_hardware_types, ',');
     'conductor/max_time_interval':                value => $max_time_interval;
     'conductor/force_power_state_during_sync':    value => $force_power_state_during_sync;

releasenotes/notes/deprecate-enabled-drivers-23273798306f9086.yaml

@@ -0,0 +1,9 @@
+---
+upgrade:
+  - |
+    The ``enabled_drivers`` configuration option will be unset on upgrade.
+deprecations:
+  - |
+    The ``ironic::conductor::enabled_drivers`` option is deprecated and has
+    no effect. Use ``ironic::conductor::enabled_hardware_types`` to configure
+    the enabled hardware types.

spec/classes/ironic_conductor_spec.rb

@@ -25,7 +25,6 @@ describe 'ironic::conductor' do
   let :default_params do
     { :package_ensure                => 'present',
       :enabled                       => true,
-      :enabled_drivers               => ['pxe_ipmitool'],
       :enabled_hardware_types        => ['ipmi'],
       :max_time_interval             => '120',
       :force_power_state_during_sync => true }
@@ -63,7 +62,7 @@ describe 'ironic::conductor' do
     end
 
     it 'configures ironic.conf' do
-      is_expected.to contain_ironic_config('DEFAULT/enabled_drivers').with_value('pxe_ipmitool')
+      is_expected.to contain_ironic_config('DEFAULT/enabled_drivers').with_ensure('absent')
       is_expected.to contain_ironic_config('DEFAULT/enabled_hardware_types').with_value('ipmi')
       is_expected.to contain_ironic_config('conductor/max_time_interval').with_value(p[:max_time_interval])
       is_expected.to contain_ironic_config('conductor/force_power_state_during_sync').with_value(p[:force_power_state_during_sync])
@@ -86,7 +85,6 @@ describe 'ironic::conductor' do
     context 'when overriding parameters' do
       before :each do
         params.merge!(
-          :enabled_drivers               => ['pxe_ilo', 'agent_ilo'],
           :enabled_hardware_types        => ['ipmi', 'irmc'],
           :max_time_interval             => '50',
           :force_power_state_during_sync => false,
@@ -106,7 +104,6 @@ describe 'ironic::conductor' do
         )
       end
       it 'should replace default parameter with new value' do
-        is_expected.to contain_ironic_config('DEFAULT/enabled_drivers').with_value('pxe_ilo,agent_ilo')
         is_expected.to contain_ironic_config('DEFAULT/enabled_hardware_types').with_value('ipmi,irmc')
         is_expected.to contain_ironic_config('conductor/max_time_interval').with_value(p[:max_time_interval])
         is_expected.to contain_ironic_config('conductor/force_power_state_during_sync').with_value(p[:force_power_state_during_sync])