diff --git a/compass/api/api.py b/compass/api/api.py
index 53841ed1..d5c16937 100644
--- a/compass/api/api.py
+++ b/compass/api/api.py
@@ -1379,12 +1379,11 @@ def convert_flavor_metadata(flavor_id):
         flavor_id, user=current_user
     )
     metadata = metadatas['flavor_config']
-    clusters = cluster_api.list_clusters(
+    flavor = metadata_api.get_flavor(
+        flavor_id,
         user=current_user
     )
-    for cluster in clusters:
-        if cluster['flavor']['id'] == flavor_id:
-            flavor_name = cluster['flavor_name'].replace('-', '_')
+    flavor_name = flavor['name'].replace('-', '_')
     configs = util.load_configs(setting.FLAVOR_MAPPING_DIR)
     for item in configs:
         if flavor_name in item.keys():
diff --git a/compass/db/api/cluster.py b/compass/db/api/cluster.py
index 3c586ebe..d377d6e3 100644
--- a/compass/db/api/cluster.py
+++ b/compass/db/api/cluster.py
@@ -467,8 +467,8 @@ def update_cluster_config(cluster_id, user=None, session=None, **kwargs):
         )
 
     def package_config_validates(config):
-        metadata_api.validate_package_config(
-            session, config, adapter_id=cluster.adapter_id
+        metadata_api.validate_flavor_config(
+            session, config, flavor_id=cluster.flavor.id
         )
 
     @utils.input_validates(
@@ -511,8 +511,8 @@ def patch_cluster_config(cluster_id, user=None, session=None, **kwargs):
         )
 
     def package_config_validates(config):
-        metadata_api.validate_package_config(
-            session, config, adapter_id=cluster.adapter_id
+        metadata_api.validate_flavor_config(
+            session, config, flavor_id=cluster.flavor.id
         )
 
     @utils.output_validates(
@@ -1081,8 +1081,8 @@ def _update_clusterhost_config(session, user, clusterhost, **kwargs):
     def package_config_validates(package_config):
         cluster = clusterhost.cluster
         is_cluster_editable(session, cluster, user)
-        metadata_api.validate_package_config(
-            session, package_config, cluster.adapter_id
+        metadata_api.validate_flavor_config(
+            session, package_config, cluster.flavor.id
         )
 
     @utils.supported_filters(
@@ -1241,8 +1241,8 @@ def _patch_clusterhost_config(session, user, clusterhost, **kwargs):
     def package_config_validates(package_config):
         cluster = clusterhost.cluster
         is_cluster_editable(session, cluster, user)
-        metadata_api.validate_package_config(
-            session, package_config, cluster.adapter_id
+        metadata_api.validate_flavor_config(
+            session, package_config, cluster.flavor.id
         )
 
     @utils.supported_filters(
@@ -1528,8 +1528,8 @@ def review_cluster(cluster_id, review={}, user=None, session=None, **kwargs):
         cluster=cluster
     )
     if package_config:
-        metadata_api.validate_package_config(
-            session, package_config, cluster.adapter_id, True
+        metadata_api.validate_flavor_config(
+            session, package_config, cluster.flavor.id, True
         )
         for clusterhost in clusterhosts:
             clusterhost_package_config = copy.deepcopy(
@@ -1542,9 +1542,9 @@ def review_cluster(cluster_id, review={}, user=None, session=None, **kwargs):
             deployed_package_config = util.merge_dict(
                 package_config, clusterhost_package_config
             )
-            metadata_api.validate_package_config(
+            metadata_api.validate_flavor_config(
                 session, deployed_package_config,
-                cluster.adapter_id, True
+                cluster.flavor.id, True
             )
             validate_clusterhost(session, clusterhost)
             utils.update_db_object(
diff --git a/compass/db/api/metadata_holder.py b/compass/db/api/metadata_holder.py
index 87513f04..a91900a0 100644
--- a/compass/db/api/metadata_holder.py
+++ b/compass/db/api/metadata_holder.py
@@ -21,6 +21,7 @@ from compass.db.api import permission
 from compass.db.api import user as user_api
 from compass.db.api import utils
 from compass.db import exception
+from compass.db import models
 from compass.utils import setting_wrapper as setting
 from compass.utils import util
 
@@ -28,6 +29,9 @@ from compass.utils import util
 RESP_METADATA_FIELDS = [
     'os_config', 'package_config', 'flavor_config'
 ]
+RESP_FLAVORS_FIELDS = [
+    'id', 'name', 'display_name', 'template', 'roles'
+]
 
 
 @database.run_in_session()
@@ -99,6 +103,17 @@ def validate_package_config(
     )
 
 
+def validate_flavor_config(
+    session, config, flavor_id, whole_check=False, **kwargs
+):
+    if not FLAVOR_METADATA_MAPPING:
+        load_flavor_metadatas_internal(session)
+    _validate_config(
+        config, flavor_id, 'flavor', FLAVOR_METADATA_MAPPING,
+        whole_check, session=session, **kwargs
+    )
+
+
 def _filter_metadata(metadata, **kwargs):
     if not isinstance(metadata, dict):
         return metadata
@@ -176,6 +191,32 @@ def get_flavor_metadata(flavor_id, user=None, session=None, **kwargs):
     }
 
 
+@utils.supported_filters([])
+@database.run_in_session()
+@user_api.check_user_permission_in_session(
+    permission.PERMISSION_LIST_METADATAS
+)
+@utils.wrap_to_dict(RESP_FLAVORS_FIELDS)
+def list_flavors(user=None, session=None, **filters):
+    """List flavors."""
+    return utils.list_db_objects(
+        session, models.AdapterFlavor, **filters
+    )
+
+
+@utils.supported_filters([])
+@database.run_in_session()
+@user_api.check_user_permission_in_session(
+    permission.PERMISSION_LIST_METADATAS
+)
+@utils.wrap_to_dict(RESP_FLAVORS_FIELDS)
+def get_flavor(flavor_id, user=None, session=None, **kwargs):
+    """Get flavor."""
+    return utils.get_db_object(
+        session, models.AdapterFlavor, id=flavor_id
+    )
+
+
 def get_os_metadata_internal(session, os_id):
     """get os metadata internal."""
     if not OS_METADATA_MAPPING:
diff --git a/compass/tests/db/api/test_metadata_holder.py b/compass/tests/db/api/test_metadata_holder.py
index 38df5c82..8c3149e8 100644
--- a/compass/tests/db/api/test_metadata_holder.py
+++ b/compass/tests/db/api/test_metadata_holder.py
@@ -310,6 +310,55 @@ class TestGetPackageOsMetadata(MetadataTestCase):
         )
 
 
+class TestListFlavors(MetadataTestCase):
+    def setUp(self):
+        super(TestListFlavors, self).setUp()
+
+    def tesrDown(self):
+        super(TestListFlavors, self).tearDown()
+
+    def test_list_flavors(self):
+        """Test list flavors."""
+        flavors = metadata.list_flavors(
+            user=self.user_object
+        )
+        flavor_name = []
+        for flavor in flavors:
+            flavor_name.append(flavor['name'])
+        expected = [
+            'allinone',
+            'multiroles',
+            'HA-multinodes',
+            'single-contoller-multi-compute'
+        ]
+        for expect in expected:
+            self.assertIn(expect, flavor_name)
+
+
+class TestGetFlavors(MetadataTestCase):
+    def setUp(self):
+        super(TestGetFlavors, self).setUp()
+
+    def tearDown(self):
+        super(TestGetFlavors, self).tearDown()
+
+    def test_get_flavor(self):
+        """Test get a flavor."""
+        flavor = metadata.get_flavor(
+            self.flavor_id,
+            user=self.user_object
+        )
+        expected = {
+            'display_name': 'Multi-node Cluster with HA',
+            'id': 3,
+            'template': 'ha_multinodes.tmpl',
+            'name': 'HA-multinodes'
+        }
+        self.assertTrue(
+            all(item in flavor.items() for item in expected.items())
+        )
+
+
 if __name__ == '__main__':
     flags.init()
     logsetting.init()
diff --git a/conf/package_metadata/openstack.conf b/conf/package_metadata/openstack.conf
index ed90df23..fc44e3dc 100644
--- a/conf/package_metadata/openstack.conf
+++ b/conf/package_metadata/openstack.conf
@@ -135,15 +135,4 @@ METADATA = {
             }
         }
     },
-    'ha_proxy': {
-        '_self': {
-        },
-        'vip': {
-           '_self': {
-               'is_required': True,
-               'field': 'general',
-               'mapping_to': 'ha_vip'
-           }
-        }
-    }
 }