Remove deprecated manager option in cells.py

The manager option in cells group is deprecated in mitaka
and hence removed in newton.

Checked cells.py for check_deprecation_status and
removed the tag according to wiki.
https://wiki.openstack.org/wiki/ConfigOptionsConsistency

Blueprint centralize-config-options-newton

Change-Id: Iebd6c261d7e5ca531dbf473f1d986b2e42f02e41

nova/cmd/cells.py

@@ -40,6 +40,6 @@ def main():
 
     server = service.Service.create(binary='nova-cells',
                                     topic=CONF.cells.topic,
-                                    manager=CONF.cells.manager)
+                                    manager='nova.cells.manager.CellsManager')
     service.serve(server)
     service.wait()

nova/conf/cells.py

@@ -1,6 +1,3 @@
-# needs:check_deprecation_status
-
-
 # Copyright 2015 OpenStack Foundation
 # All Rights Reserved.
 #
@@ -23,6 +20,7 @@
                             help="""
 Cells options allow you to use cells functionality in openstack
 deployment.
+
 """)
 
 cells_opts = [
@@ -46,6 +44,7 @@
 * name: A unique cell name must be given when this functionality
   is enabled.
 * cell_type: Cell type should be defined for all cells.
+
 """),
     cfg.StrOpt('topic',
                 default='cells',
@@ -60,31 +59,6 @@
 
 * cells: This is the recommended and the default value.
 
-"""),
-    cfg.StrOpt('manager',
-               default='nova.cells.manager.CellsManager',
-               deprecated_for_removal=True,
-               help="""
-Manager for cells
-
-The nova-cells manager class. This class defines RPC methods that
-the local cell may call. This class is NOT used for messages coming
-from other cells. That communication is driver-specific.
-
-Communication to other cells happens via the nova.cells.messaging module.
-The MessageRunner from that module will handle routing the message to
-the correct cell via the communication driver. Most methods below
-create 'targeted' (where we want to route a message to a specific cell)
-or 'broadcast' (where we want a message to go to multiple cells)
-messages.
-
-Scheduling requests get passed to the scheduler class.
-
-Possible values:
-
-* 'nova.cells.manager.CellsManager' is the only possible value for
-  this option as of the Mitaka release
-
 """),
     cfg.StrOpt('name',
                 default='nova',
@@ -99,6 +73,7 @@
 
 * enabled: This option is meaningful only when cells service
   is enabled
+
 """),
     cfg.ListOpt('capabilities',
                 default=['hypervisor=xenserver;kvm', 'os=linux;windows'],
@@ -291,6 +266,7 @@
 
 * This value is used with the ``instance_update_num_instances``
   value in a periodic task run.
+
 """),
         cfg.IntOpt("instance_update_num_instances",
                 default=1,
@@ -311,6 +287,7 @@
 
 * This value is used with the ``instance_updated_at_threshold``
   value in a periodic task run.
+
 """)
 ]
 
@@ -339,7 +316,6 @@
 the full Python path to the class to be used. If nothing is specified
 in this option, the CellsScheduler is used.
 
-
 """)
 ]
 
@@ -443,6 +419,7 @@
 
 * This value is used with the ``scheduler_retry_delay`` value
   while retrying to find a suitable cell.
+
 """),
         cfg.IntOpt('scheduler_retry_delay',
                 default=2,
@@ -463,6 +440,7 @@
 
 * This value is used with the ``scheduler_retries`` value
   while retrying to find a suitable cell.
+
 """)
 ]
 

nova/tests/functional/api_sample_tests/test_cells.py

@@ -32,7 +32,8 @@ def setUp(self):
         # db_check_interval < 0 makes cells manager always hit the DB
         self.flags(enable=True, db_check_interval=-1, group='cells')
         super(CellsSampleJsonTest, self).setUp()
-        self.cells = self.start_service('cells', manager=CONF.cells.manager)
+        self.cells = self.start_service('cells',
+                                 manager='nova.cells.manager.CellsManager')
         self._stub_cells()
 
     def _stub_cells(self, num_cells=5):

releasenotes/notes/remove-deprecated-cells-manager-option-d9d20691c08d2752.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - The 'manager' option in [cells] group was deprecated in Mitaka and
+    now it is removed completely in newton. There is no impact.