diff --git a/senlin/common/senlin_consts.py b/senlin/common/senlin_consts.py
new file mode 100644
index 000000000..64c9fe241
--- /dev/null
+++ b/senlin/common/senlin_consts.py
@@ -0,0 +1,33 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+
+# ACTION PHRASES
+CLUSTER_CREATE = 'CLUSTER_CREATE'
+CLUSTER_DELETE = 'CLUSTER_DELETE'
+CLUSTER_UPDATE = 'CLUSTER_UPDATE'
+CLUSTER_ADD_NODES = 'CLUSTER_ADD_NODES'
+CLUSTER_DEL_NODES = 'CLUSTER_DEL_NODES'
+CLUSTER_SCALE_UP = 'CLUSTER_SCALE_UP'
+CLUSTER_SCALE_DOWN = 'CLUSTER_SCALE_DOWN'
+CLUSTER_ATTACH_POLICY = 'CLUSTER_ATTACH_POLICY'
+CLUSTER_DETACH_POLICY = 'CLUSTER_DETACH_POLICY'
+
+NODE_CREATE = 'NODE_CREATE'
+NODE_DELETE = 'NODE_DELETE'
+NODE_UPDATE = 'NODE_UPDATE'
+NODE_JOIN_CLUSTER = 'NODE_JOIN_CLUSTER'
+NODE_LEAVE_CLUSTER = 'NODE_LEAVE_CLUSTER'
+
+POLICY_ENABLE = 'POLICY_ENABLE'
+POLICY_DISABLE = 'POLICY_DISABLE'
+POLICY_UPDATE = 'POLICY_UPDATE'
diff --git a/senlin/policies/deletion_policy.py b/senlin/policies/deletion_policy.py
index 85f26b14d..296ea18be 100644
--- a/senlin/policies/deletion_policy.py
+++ b/senlin/policies/deletion_policy.py
@@ -12,6 +12,7 @@
 
 import random
 
+from senlin.common import senlin_consts as consts
 from senlin.db import api as db_api
 from senlin.policies import base
 
@@ -30,9 +31,9 @@ class DeletionPolicy(base.Policy):
     )
 
     TARGET = [
-        ('WHEN', 'CLUSTER_SCALE_DOWN'),
-        ('AFTER', 'CLUSTER_DEL_NODES'),
-        ('AFTER', 'CLUSTER_SCALE_DOWN'),
+        ('WHEN', consts.CLUSTER_SCALE_DOWN),
+        ('AFTER', consts.CLUSTER_DEL_NODES),
+        ('AFTER', consts.CLUSTER_SCALE_DOWN),
     ]
 
     PROFILE_TYPE = [