Remove sahara support

The sahara project has been retired because of inactivity[1].

[1] https://review.opendev.org/c/openstack/governance/+/919374

Change-Id: Icd57662a55ca8f0e4ee28aee7eae7f06e498ae9e

ceilometer/notification.py

@@ -68,7 +68,7 @@ OPTS = [
 EXCHANGES_OPTS = [
     cfg.MultiStrOpt('notification_control_exchanges',
                     default=['nova', 'glance', 'neutron', 'cinder', 'heat',
-                             'keystone', 'sahara', 'trove', 'zaqar', 'swift',
+                             'keystone', 'trove', 'zaqar', 'swift',
                              'ceilometer', 'magnum', 'dns', 'ironic', 'aodh'],
                     deprecated_group='DEFAULT',
                     deprecated_name="http_control_exchanges",

ceilometer/pipeline/data/event_definitions.yaml

@@ -202,33 +202,6 @@
       fields: payload.stack_identity
     name:
       fields: payload.name
-- event_type: sahara.cluster.*
-  traits: &sahara_crud
-    project_id:
-      fields: payload.project_id
-    user_id:
-      fields: ctxt.user_id
-    resource_id:
-      fields: payload.cluster_id
-    name:
-      fields: payload.name
-- event_type: sahara.cluster.health
-  traits: &sahara_health
-    <<: *sahara_crud
-    verification_id:
-      fields: payload.verification_id
-    health_check_status:
-      fields: payload.health_check_status
-    health_check_name:
-      fields: payload.health_check_name
-    health_check_description:
-      fields: payload.health_check_description
-    created_at:
-      type: datetime
-      fields: payload.created_at
-    updated_at:
-      type: datetime
-      fields: payload.updated_at
 - event_type: ['identity.user.*', 'identity.project.*', 'identity.group.*', 'identity.role.*', 'identity.OS-TRUST:trust.*',
                'identity.region.*', 'identity.service.*', 'identity.endpoint.*', 'identity.policy.*']
   traits: &identity_crud

ceilometer/tests/unit/test_notification.py

@@ -93,7 +93,7 @@ class TestNotification(BaseNotificationTest):
         self.srv = notification.NotificationService(0, self.CONF)
 
     def test_targets(self):
-        self.assertEqual(15, len(self.srv.get_targets()))
+        self.assertEqual(14, len(self.srv.get_targets()))
 
     def test_start_multiple_listeners(self):
         urls = ["fake://vhost1", "fake://vhost2"]

releasenotes/notes/remove-sahara-9254593d4fb137b9.yaml

@@ -0,0 +1,9 @@
+---
+upgrade:
+  - |
+    Default value of the ``[notification] notification_control_exchanges``
+    option has been updated and ``sahara`` is no longer included by default.
+
+  - |
+    The default event definiton has been updated and no longer includes
+    events for sahara.