diff --git a/cinder/api/openstack/api_version_request.py b/cinder/api/openstack/api_version_request.py
index f70c0bc081b..7bc492d971c 100644
--- a/cinder/api/openstack/api_version_request.py
+++ b/cinder/api/openstack/api_version_request.py
@@ -89,7 +89,7 @@ REST_API_VERSION_HISTORY = """
              ``message``, ``attachment``, ``group`` and ``group-snapshot``
              list APIs.
     * 3.35 - Add ``volume-type`` filter to Get-Pools API.
-
+    * 3.36 - Add metadata to volumes/summary response body.
 """
 
 # The minimum and maximum versions of the API supported
@@ -97,7 +97,7 @@ REST_API_VERSION_HISTORY = """
 # minimum version of the API supported.
 # Explicitly using /v1 or /v2 endpoints will still work
 _MIN_API_VERSION = "3.0"
-_MAX_API_VERSION = "3.35"
+_MAX_API_VERSION = "3.36"
 _LEGACY_API_VERSION1 = "1.0"
 _LEGACY_API_VERSION2 = "2.0"
 
diff --git a/cinder/api/openstack/rest_api_version_history.rst b/cinder/api/openstack/rest_api_version_history.rst
index a541c876b87..3de8d56b4de 100644
--- a/cinder/api/openstack/rest_api_version_history.rst
+++ b/cinder/api/openstack/rest_api_version_history.rst
@@ -317,3 +317,7 @@ user documentation.
 3.35
 ----
   Add ``volume-type`` filter to Get-Pools API.
+
+3.36
+----
+  Add metadata to volumes/summary response body.
diff --git a/cinder/api/v3/views/volumes.py b/cinder/api/v3/views/volumes.py
index ba126a76d8f..eb9b4058702 100644
--- a/cinder/api/v3/views/volumes.py
+++ b/cinder/api/v3/views/volumes.py
@@ -19,14 +19,22 @@ from cinder.api.v2.views import volumes as views_v2
 class ViewBuilder(views_v2.ViewBuilder):
     """Model a volumes API V3 response as a python dictionary."""
 
-    def quick_summary(self, volume_count, volume_size):
-        """Number of volumes and size of volumes."""
-        return {
+    def quick_summary(self, volume_count, volume_size,
+                      all_distinct_metadata=None):
+        """View of volumes summary.
+
+        It includes number of volumes, size of volumes and all distinct
+        metadata of volumes.
+        """
+        summary = {
             'volume-summary': {
                 'total_count': volume_count,
                 'total_size': volume_size
-            },
+            }
         }
+        if all_distinct_metadata is not None:
+            summary['volume-summary']['metadata'] = all_distinct_metadata
+        return summary
 
     def detail(self, request, volume):
         """Detailed view of a single volume."""
diff --git a/cinder/api/v3/volumes.py b/cinder/api/v3/volumes.py
index c69328bf700..aa483b03cb2 100644
--- a/cinder/api/v3/volumes.py
+++ b/cinder/api/v3/volumes.py
@@ -148,8 +148,17 @@ class VolumeController(volumes_v2.VolumeController):
         utils.remove_invalid_filter_options(context, filters,
                                             self._get_volume_filter_options())
 
-        volumes = self.volume_api.get_volume_summary(context, filters=filters)
-        return view_builder_v3.quick_summary(volumes[0], int(volumes[1]))
+        num_vols, sum_size, metadata = self.volume_api.get_volume_summary(
+            context, filters=filters)
+
+        req_version = req.api_version_request
+        if req_version.matches("3.36"):
+            all_distinct_metadata = metadata
+        else:
+            all_distinct_metadata = None
+
+        return view_builder_v3.quick_summary(num_vols, int(sum_size),
+                                             all_distinct_metadata)
 
     @wsgi.response(http_client.ACCEPTED)
     def create(self, req, body):
diff --git a/cinder/db/sqlalchemy/api.py b/cinder/db/sqlalchemy/api.py
index dda3084536c..c0d3ee1eaf8 100644
--- a/cinder/db/sqlalchemy/api.py
+++ b/cinder/db/sqlalchemy/api.py
@@ -2100,7 +2100,22 @@ def get_volume_summary(context, project_only):
         return []
 
     result = query.first()
-    return (result[0] or 0, result[1] or 0)
+
+    query_metadata = model_query(
+        context, models.VolumeMetadata.key, models.VolumeMetadata.value,
+        read_deleted="no")
+    if project_only:
+        query_metadata = query_metadata.join(
+            models.Volume,
+            models.Volume.id == models.VolumeMetadata.volume_id).filter_by(
+            project_id=context.project_id)
+    result_metadata = query_metadata.distinct().all()
+
+    result_metadata_list = collections.defaultdict(list)
+    for key, value in result_metadata:
+        result_metadata_list[key].append(value)
+
+    return (result[0] or 0, result[1] or 0, result_metadata_list)
 
 
 @require_admin_context
diff --git a/cinder/tests/unit/api/v3/test_volumes.py b/cinder/tests/unit/api/v3/test_volumes.py
index 673d32af5b7..0d0062c7a68 100644
--- a/cinder/tests/unit/api/v3/test_volumes.py
+++ b/cinder/tests/unit/api/v3/test_volumes.py
@@ -30,6 +30,7 @@ from cinder.tests.unit.api import fakes
 from cinder.tests.unit.api.v2 import fakes as v2_fakes
 from cinder.tests.unit.api.v2 import test_volumes as v2_test_volumes
 from cinder.tests.unit import fake_constants as fake
+from cinder.tests.unit import utils as test_utils
 from cinder import utils
 from cinder.volume import api as volume_api
 from cinder.volume import api as vol_get
@@ -156,8 +157,12 @@ class VolumeApiTest(test.TestCase):
         volumes = res_dict['volumes']
         self.assertEqual(2, len(volumes))
 
-    def _fake_volumes_summary_request(self, version='3.12'):
-        req = fakes.HTTPRequest.blank('/v3/volumes/summary')
+    def _fake_volumes_summary_request(self, version='3.12', all_tenant=False,
+                                      is_admin=False):
+        req_url = '/v3/volumes/summary'
+        if all_tenant:
+            req_url += '?all_tenants=True'
+        req = fakes.HTTPRequest.blank(req_url, use_admin_context=is_admin)
         req.headers = {'OpenStack-API-Version': 'volume ' + version}
         req.api_version_request = api_version.APIVersionRequest(version)
         return req
@@ -186,6 +191,63 @@ class VolumeApiTest(test.TestCase):
         expected = {'volume-summary': {'total_size': 1.0, 'total_count': 1}}
         self.assertEqual(expected, res_dict)
 
+    @ddt.data(
+        ('3.35', {'volume-summary': {'total_size': 0.0,
+                                     'total_count': 0}}),
+        ('3.36', {'volume-summary': {'total_size': 0.0,
+                                     'total_count': 0,
+                                     'metadata': {}}}))
+    @ddt.unpack
+    def test_volume_summary_empty(self, summary_api_version, expect_result):
+        req = self._fake_volumes_summary_request(version=summary_api_version)
+        res_dict = self.controller.summary(req)
+        self.assertEqual(expect_result, res_dict)
+
+    @ddt.data(
+        ('3.35', {'volume-summary': {'total_size': 2,
+                                     'total_count': 2}}),
+        ('3.36', {'volume-summary': {'total_size': 2,
+                                     'total_count': 2,
+                                     'metadata': {
+                                         'name': ['test_name1', 'test_name2'],
+                                         'age': ['test_age']}}}))
+    @ddt.unpack
+    def test_volume_summary_return_metadata(self, summary_api_version,
+                                            expect_result):
+        test_utils.create_volume(self.ctxt, metadata={'name': 'test_name1',
+                                                      'age': 'test_age'})
+        test_utils.create_volume(self.ctxt, metadata={'name': 'test_name2',
+                                                      'age': 'test_age'})
+        ctxt2 = context.RequestContext(fake.USER_ID, fake.PROJECT2_ID, True)
+        test_utils.create_volume(ctxt2, metadata={'name': 'test_name3'})
+
+        req = self._fake_volumes_summary_request(version=summary_api_version)
+        res_dict = self.controller.summary(req)
+        self.assertEqual(expect_result, res_dict)
+
+    @ddt.data(
+        ('3.35', {'volume-summary': {'total_size': 2,
+                                     'total_count': 2}}),
+        ('3.36', {'volume-summary': {'total_size': 2,
+                                     'total_count': 2,
+                                     'metadata': {
+                                         'name': ['test_name1', 'test_name2'],
+                                         'age': ['test_age']}}}))
+    @ddt.unpack
+    def test_volume_summary_return_metadata_all_tenant(
+            self, summary_api_version, expect_result):
+        test_utils.create_volume(self.ctxt, metadata={'name': 'test_name1',
+                                                      'age': 'test_age'})
+        ctxt2 = context.RequestContext(fake.USER_ID, fake.PROJECT2_ID, True)
+        test_utils.create_volume(ctxt2, metadata={'name': 'test_name2',
+                                                  'age': 'test_age'})
+
+        req = self._fake_volumes_summary_request(version=summary_api_version,
+                                                 all_tenant=True,
+                                                 is_admin=True)
+        res_dict = self.controller.summary(req)
+        self.assertEqual(expect_result, res_dict)
+
     def _vol_in_request_body(self,
                              size=v2_fakes.DEFAULT_VOL_SIZE,
                              name=v2_fakes.DEFAULT_VOL_NAME,
diff --git a/cinder/tests/unit/utils.py b/cinder/tests/unit/utils.py
index d060e202341..d2ae3f88912 100644
--- a/cinder/tests/unit/utils.py
+++ b/cinder/tests/unit/utils.py
@@ -69,6 +69,7 @@ def create_volume(ctxt,
                   previous_status=None,
                   testcase_instance=None,
                   id=None,
+                  metadata=None,
                   **kwargs):
     """Create a volume object in the DB."""
     vol = {}
@@ -89,6 +90,8 @@ def create_volume(ctxt,
         vol['group_id'] = group_id
     if volume_type_id:
         vol['volume_type_id'] = volume_type_id
+    if metadata:
+        vol['metadata'] = metadata
     for key in kwargs:
         vol[key] = kwargs[key]
     vol['replication_status'] = replication_status
diff --git a/releasenotes/notes/metadata-for-volume-summary-729ba648db4e4e54.yaml b/releasenotes/notes/metadata-for-volume-summary-729ba648db4e4e54.yaml
new file mode 100644
index 00000000000..2c4f7b2f352
--- /dev/null
+++ b/releasenotes/notes/metadata-for-volume-summary-729ba648db4e4e54.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - Added support for get all distinct volumes' metadata from
+    volume-summary API.
\ No newline at end of file