diff --git a/doc/source/conf.py b/doc/source/conf.py
index 4e7a72d..0cfdf34 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -25,8 +25,6 @@
 import os
 import subprocess
 
-import openstackdocstheme
-
 # Build the plugin registry
 def build_plugin_registry(app):
     root_dir = os.path.dirname(
diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index 336aa5b..d80081d 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -330,13 +330,9 @@
 
  .. _2.47: http://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id42
 
- * `2.52`_
+ * `2.48`_
 
- .. _2.52: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id47
-
- * `2.53`_
-
- .. _2.53: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id48
+ .. _2.48: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id43
 
 * Volume
 
diff --git a/releasenotes/notes/add-create-group-from-src-tempest-tests-9eb8b0b4b5c52055.yaml b/releasenotes/notes/add-create-group-from-src-tempest-tests-9eb8b0b4b5c52055.yaml
new file mode 100644
index 0000000..dec4a27
--- /dev/null
+++ b/releasenotes/notes/add-create-group-from-src-tempest-tests-9eb8b0b4b5c52055.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Add create_group_from_source to groups_client in the volume service library.
diff --git a/releasenotes/notes/add-show-volume-image-metadata-api-to-v2-volumes-client-ee3c027f35276561.yaml b/releasenotes/notes/add-show-volume-image-metadata-api-to-v2-volumes-client-ee3c027f35276561.yaml
new file mode 100644
index 0000000..ac7c74e
--- /dev/null
+++ b/releasenotes/notes/add-show-volume-image-metadata-api-to-v2-volumes-client-ee3c027f35276561.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add show volume image metadata API to v2 volumes_client library.
+    This feature enables the possibility to show volume's image metadata.
diff --git a/releasenotes/notes/plugin-client-registration-enhancements-e09131742391225b.yaml b/releasenotes/notes/plugin-client-registration-enhancements-e09131742391225b.yaml
new file mode 100644
index 0000000..b6391b6
--- /dev/null
+++ b/releasenotes/notes/plugin-client-registration-enhancements-e09131742391225b.yaml
@@ -0,0 +1,12 @@
+---
+features:
+  - |
+    When registering service clients from installed plugins, all registrations
+    are now processed, even if one or more fails. All exceptions encountered
+    during the registration process are recorded.  If at least one exception
+    was encountered, the registration process fails and all interim errors are
+    reported.
+  - |
+    The __repr__ method is now implemented for the base `tempest.Exception`
+    class, its implementation is identical to __str__: it reports the error
+    message merged with input parameters.
diff --git a/tempest/api/compute/admin/test_aggregates.py b/tempest/api/compute/admin/test_aggregates.py
index 902ea9a..57d3983 100644
--- a/tempest/api/compute/admin/test_aggregates.py
+++ b/tempest/api/compute/admin/test_aggregates.py
@@ -125,7 +125,6 @@
             name=aggregate_name, availability_zone=az_name)
 
         self.assertEqual(az_name, aggregate['availability_zone'])
-        self.assertIsNotNone(aggregate['id'])
 
         aggregate_id = aggregate['id']
         new_aggregate_name = aggregate_name + '_new'
diff --git a/tempest/api/compute/admin/test_hosts.py b/tempest/api/compute/admin/test_hosts.py
index 0e1e7ed..00f3256 100644
--- a/tempest/api/compute/admin/test_hosts.py
+++ b/tempest/api/compute/admin/test_hosts.py
@@ -65,9 +65,4 @@
             resources = self.client.show_host(hostname)['host']
             self.assertNotEmpty(resources)
             host_resource = resources[0]['resource']
-            self.assertIsNotNone(host_resource)
-            self.assertIsNotNone(host_resource['cpu'])
-            self.assertIsNotNone(host_resource['disk_gb'])
-            self.assertIsNotNone(host_resource['memory_mb'])
-            self.assertIsNotNone(host_resource['project'])
             self.assertEqual(hostname, host_resource['host'])
diff --git a/tempest/api/compute/keypairs/test_keypairs.py b/tempest/api/compute/keypairs/test_keypairs.py
index a35e60a..3a54d51 100644
--- a/tempest/api/compute/keypairs/test_keypairs.py
+++ b/tempest/api/compute/keypairs/test_keypairs.py
@@ -51,13 +51,10 @@
         # Keypair should be created, verified and deleted
         k_name = data_utils.rand_name('keypair')
         keypair = self.create_keypair(k_name)
-        private_key = keypair['private_key']
         key_name = keypair['name']
         self.assertEqual(key_name, k_name,
                          "The created keypair name is not equal "
                          "to the requested name")
-        self.assertIsNotNone(private_key,
-                             "Field private_key is empty or not found.")
 
     @decorators.idempotent_id('a4233d5d-52d8-47cc-9a25-e1864527e3df')
     def test_get_keypair_detail(self):
@@ -68,9 +65,6 @@
         self.assertEqual(keypair_detail['name'], k_name,
                          "The created keypair name is not equal "
                          "to requested name")
-        public_key = keypair_detail['public_key']
-        self.assertIsNotNone(public_key,
-                             "Field public_key is empty or not found.")
 
     @decorators.idempotent_id('39c90c6a-304a-49dd-95ec-2366129def05')
     def test_keypair_create_with_pub_key(self):
diff --git a/tempest/api/compute/servers/test_virtual_interfaces.py b/tempest/api/compute/servers/test_virtual_interfaces.py
index 6b625d9..a42b968 100644
--- a/tempest/api/compute/servers/test_virtual_interfaces.py
+++ b/tempest/api/compute/servers/test_virtual_interfaces.py
@@ -56,7 +56,6 @@
                 self.client.list_virtual_interfaces(self.server['id'])
         else:
             output = self.client.list_virtual_interfaces(self.server['id'])
-            self.assertIsNotNone(output)
             virt_ifaces = output
             self.assertNotEmpty(virt_ifaces['virtual_interfaces'],
                                 'Expected virtual interfaces, got 0 '
diff --git a/tempest/api/compute/volumes/test_volumes_get.py b/tempest/api/compute/volumes/test_volumes_get.py
index cb6ab43..d83d49e 100644
--- a/tempest/api/compute/volumes/test_volumes_get.py
+++ b/tempest/api/compute/volumes/test_volumes_get.py
@@ -55,8 +55,6 @@
         self.assertEqual(volume['displayName'], v_name,
                          "The created volume name is not equal "
                          "to the requested name")
-        self.assertIsNotNone(volume['id'],
-                             "Field volume id is empty or not found.")
         # GET Volume
         fetched_volume = self.volumes_client.show_volume(
             volume['id'])['volume']
diff --git a/tempest/api/volume/admin/test_groups.py b/tempest/api/volume/admin/test_groups.py
index 4c1a3eb..5f01166 100644
--- a/tempest/api/volume/admin/test_groups.py
+++ b/tempest/api/volume/admin/test_groups.py
@@ -17,6 +17,7 @@
 from tempest.common import waiters
 from tempest import config
 from tempest.lib.common.utils import data_utils
+from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
@@ -27,34 +28,43 @@
     min_microversion = '3.14'
     max_microversion = 'latest'
 
-    @classmethod
-    def setup_clients(cls):
-        super(GroupsTest, cls).setup_clients()
-        cls.volumes_client = cls.admin_volume_client
-
     def _delete_group(self, grp_id, delete_volumes=True):
-        self.admin_groups_client.delete_group(grp_id, delete_volumes)
-        vols = self.admin_volume_client.list_volumes(detail=True)['volumes']
+        self.groups_client.delete_group(grp_id, delete_volumes)
+        vols = self.volumes_client.list_volumes(detail=True)['volumes']
         for vol in vols:
             if vol['group_id'] == grp_id:
-                self.admin_volume_client.wait_for_resource_deletion(vol['id'])
-        self.admin_groups_client.wait_for_resource_deletion(grp_id)
+                self.volumes_client.wait_for_resource_deletion(vol['id'])
+        self.groups_client.wait_for_resource_deletion(grp_id)
 
     def _delete_group_snapshot(self, group_snapshot_id, grp_id):
-        self.admin_group_snapshots_client.delete_group_snapshot(
+        self.group_snapshots_client.delete_group_snapshot(
             group_snapshot_id)
-        vols = self.admin_volume_client.list_volumes(detail=True)['volumes']
-        snapshots = self.admin_snapshots_client.list_snapshots(
+        vols = self.volumes_client.list_volumes(detail=True)['volumes']
+        snapshots = self.snapshots_client.list_snapshots(
             detail=True)['snapshots']
         for vol in vols:
             for snap in snapshots:
                 if (vol['group_id'] == grp_id and
                         vol['id'] == snap['volume_id']):
-                    self.admin_snapshots_client.wait_for_resource_deletion(
+                    self.snapshots_client.wait_for_resource_deletion(
                         snap['id'])
-        self.admin_group_snapshots_client.wait_for_resource_deletion(
+        self.group_snapshots_client.wait_for_resource_deletion(
             group_snapshot_id)
 
+    def _create_group(self, group_type, volume_type, grp_name=None):
+        if not grp_name:
+            grp_name = data_utils.rand_name('Group')
+        grp = self.groups_client.create_group(
+            group_type=group_type['id'],
+            volume_types=[volume_type['id']],
+            name=grp_name)['group']
+        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
+                        self._delete_group, grp['id'])
+        waiters.wait_for_volume_resource_status(
+            self.groups_client, grp['id'], 'available')
+        self.assertEqual(grp_name, grp['name'])
+        return grp
+
     @decorators.idempotent_id('4b111d28-b73d-4908-9bd2-03dc2992e4d4')
     def test_group_create_show_list_delete(self):
         # Create volume type
@@ -65,21 +75,13 @@
 
         # Create group
         grp1_name = data_utils.rand_name('Group1')
-        grp1 = self.admin_groups_client.create_group(
-            group_type=group_type['id'],
-            volume_types=[volume_type['id']],
-            name=grp1_name)['group']
-        waiters.wait_for_volume_resource_status(
-            self.admin_groups_client, grp1['id'], 'available')
+        grp1 = self._create_group(group_type, volume_type,
+                                  grp_name=grp1_name)
         grp1_id = grp1['id']
 
         grp2_name = data_utils.rand_name('Group2')
-        grp2 = self.admin_groups_client.create_group(
-            group_type=group_type['id'],
-            volume_types=[volume_type['id']],
-            name=grp2_name)['group']
-        waiters.wait_for_volume_resource_status(
-            self.admin_groups_client, grp2['id'], 'available')
+        grp2 = self._create_group(group_type, volume_type,
+                                  grp_name=grp2_name)
         grp2_id = grp2['id']
 
         # Create volume
@@ -88,23 +90,23 @@
                   'volume_type': volume_type['id'],
                   'group_id': grp1['id'],
                   'size': CONF.volume.volume_size}
-        vol1 = self.admin_volume_client.create_volume(**params)['volume']
+        vol1 = self.volumes_client.create_volume(**params)['volume']
         self.assertEqual(grp1['id'], vol1['group_id'])
         waiters.wait_for_volume_resource_status(
-            self.admin_volume_client, vol1['id'], 'available')
+            self.volumes_client, vol1['id'], 'available')
         vol1_id = vol1['id']
 
         # Get a given group
-        grp1 = self.admin_groups_client.show_group(grp1['id'])['group']
+        grp1 = self.groups_client.show_group(grp1['id'])['group']
         self.assertEqual(grp1_name, grp1['name'])
         self.assertEqual(grp1_id, grp1['id'])
 
-        grp2 = self.admin_groups_client.show_group(grp2['id'])['group']
+        grp2 = self.groups_client.show_group(grp2['id'])['group']
         self.assertEqual(grp2_name, grp2['name'])
         self.assertEqual(grp2_id, grp2['id'])
 
         # Get all groups with detail
-        grps = self.admin_groups_client.list_groups(
+        grps = self.groups_client.list_groups(
             detail=True)['groups']
         filtered_grps = [g for g in grps if g['id'] in [grp1_id, grp2_id]]
         self.assertEqual(2, len(filtered_grps))
@@ -112,7 +114,7 @@
             self.assertEqual([volume_type['id']], grp['volume_types'])
             self.assertEqual(group_type['id'], grp['group_type'])
 
-        vols = self.admin_volume_client.list_volumes(
+        vols = self.volumes_client.list_volumes(
             detail=True)['volumes']
         filtered_vols = [v for v in vols if v['id'] in [vol1_id]]
         self.assertEqual(1, len(filtered_vols))
@@ -124,7 +126,7 @@
         self._delete_group(grp1_id)
         # grp2 is empty so delete_volumes flag can be set to False
         self._delete_group(grp2_id, delete_volumes=False)
-        grps = self.admin_groups_client.list_groups(
+        grps = self.groups_client.list_groups(
             detail=True)['groups']
         self.assertEmpty(grps)
 
@@ -137,15 +139,7 @@
         group_type = self.create_group_type()
 
         # Create group
-        grp_name = data_utils.rand_name('Group')
-        grp = self.admin_groups_client.create_group(
-            group_type=group_type['id'],
-            volume_types=[volume_type['id']],
-            name=grp_name)['group']
-        waiters.wait_for_volume_resource_status(
-            self.admin_groups_client, grp['id'], 'available')
-        self.addCleanup(self._delete_group, grp['id'])
-        self.assertEqual(grp_name, grp['name'])
+        grp = self._create_group(group_type, volume_type)
 
         # Create volume
         vol = self.create_volume(volume_type=volume_type['id'],
@@ -154,28 +148,28 @@
         # Create group snapshot
         group_snapshot_name = data_utils.rand_name('group_snapshot')
         group_snapshot = (
-            self.admin_group_snapshots_client.create_group_snapshot(
+            self.group_snapshots_client.create_group_snapshot(
                 group_id=grp['id'],
                 name=group_snapshot_name)['group_snapshot'])
-        snapshots = self.admin_snapshots_client.list_snapshots(
+        snapshots = self.snapshots_client.list_snapshots(
             detail=True)['snapshots']
         for snap in snapshots:
             if vol['id'] == snap['volume_id']:
                 waiters.wait_for_volume_resource_status(
-                    self.admin_snapshots_client, snap['id'], 'available')
+                    self.snapshots_client, snap['id'], 'available')
         waiters.wait_for_volume_resource_status(
-            self.admin_group_snapshots_client,
+            self.group_snapshots_client,
             group_snapshot['id'], 'available')
         self.assertEqual(group_snapshot_name, group_snapshot['name'])
 
         # Get a given group snapshot
-        group_snapshot = self.admin_group_snapshots_client.show_group_snapshot(
+        group_snapshot = self.group_snapshots_client.show_group_snapshot(
             group_snapshot['id'])['group_snapshot']
         self.assertEqual(group_snapshot_name, group_snapshot['name'])
 
         # Get all group snapshots with detail
         group_snapshots = (
-            self.admin_group_snapshots_client.list_group_snapshots(
+            self.group_snapshots_client.list_group_snapshots(
                 detail=True)['group_snapshots'])
         self.assertIn((group_snapshot['name'], group_snapshot['id']),
                       [(m['name'], m['id']) for m in group_snapshots])
@@ -183,6 +177,84 @@
         # Delete group snapshot
         self._delete_group_snapshot(group_snapshot['id'], grp['id'])
         group_snapshots = (
-            self.admin_group_snapshots_client.list_group_snapshots(
+            self.group_snapshots_client.list_group_snapshots(
                 detail=True)['group_snapshots'])
         self.assertEmpty(group_snapshots)
+
+    @decorators.idempotent_id('eff52c70-efc7-45ed-b47a-4ad675d09b81')
+    def test_create_group_from_group_snapshot(self):
+        # Create volume type
+        volume_type = self.create_volume_type()
+
+        # Create group type
+        group_type = self.create_group_type()
+
+        # Create Group
+        grp = self._create_group(group_type, volume_type)
+
+        # Create volume
+        vol = self.create_volume(volume_type=volume_type['id'],
+                                 group_id=grp['id'])
+
+        # Create group_snapshot
+        group_snapshot_name = data_utils.rand_name('group_snapshot')
+        group_snapshot = (
+            self.group_snapshots_client.create_group_snapshot(
+                group_id=grp['id'],
+                name=group_snapshot_name)['group_snapshot'])
+        self.addCleanup(self._delete_group_snapshot,
+                        group_snapshot['id'], grp['id'])
+        self.assertEqual(group_snapshot_name, group_snapshot['name'])
+        snapshots = self.snapshots_client.list_snapshots(
+            detail=True)['snapshots']
+        for snap in snapshots:
+            if vol['id'] == snap['volume_id']:
+                waiters.wait_for_volume_resource_status(
+                    self.snapshots_client, snap['id'], 'available')
+        waiters.wait_for_volume_resource_status(
+            self.group_snapshots_client,
+            group_snapshot['id'], 'available')
+
+        # Create Group from Group snapshot
+        grp_name2 = data_utils.rand_name('Group_from_snap')
+        grp2 = self.groups_client.create_group_from_source(
+            group_snapshot_id=group_snapshot['id'],
+            name=grp_name2)['group']
+        self.addCleanup(self._delete_group, grp2['id'])
+        self.assertEqual(grp_name2, grp2['name'])
+        vols = self.volumes_client.list_volumes(detail=True)['volumes']
+        for vol in vols:
+            if vol['group_id'] == grp2['id']:
+                waiters.wait_for_volume_resource_status(
+                    self.volumes_client, vol['id'], 'available')
+        waiters.wait_for_volume_resource_status(
+            self.groups_client, grp2['id'], 'available')
+
+    @decorators.idempotent_id('2424af8c-7851-4888-986a-794b10c3210e')
+    def test_create_group_from_group(self):
+        # Create volume type
+        volume_type = self.create_volume_type()
+
+        # Create group type
+        group_type = self.create_group_type()
+
+        # Create Group
+        grp = self._create_group(group_type, volume_type)
+
+        # Create volume
+        self.create_volume(volume_type=volume_type['id'], group_id=grp['id'])
+
+        # Create Group from Group
+        grp_name2 = data_utils.rand_name('Group_from_grp')
+        grp2 = self.groups_client.create_group_from_source(
+            source_group_id=grp['id'], name=grp_name2)['group']
+        self.addCleanup(self._delete_group, grp2['id'])
+        self.assertEqual(grp_name2, grp2['name'])
+        vols = self.volumes_client.list_volumes(
+            detail=True)['volumes']
+        for vol in vols:
+            if vol['group_id'] == grp2['id']:
+                waiters.wait_for_volume_resource_status(
+                    self.volumes_client, vol['id'], 'available')
+        waiters.wait_for_volume_resource_status(
+            self.groups_client, grp2['id'], 'available')
diff --git a/tempest/api/volume/test_image_metadata.py b/tempest/api/volume/test_image_metadata.py
index 77baf18..129981b 100644
--- a/tempest/api/volume/test_image_metadata.py
+++ b/tempest/api/volume/test_image_metadata.py
@@ -40,7 +40,7 @@
 
     @decorators.idempotent_id('03efff0b-5c75-4822-8f10-8789ac15b13e')
     @test.services('image')
-    def test_update_image_metadata(self):
+    def test_update_show_delete_image_metadata(self):
         # Update image metadata
         image_metadata = {'image_id': '5137a025-3c5f-43c1-bc64-5f41270040a5',
                           'image_name': 'image',
@@ -49,7 +49,7 @@
         self.volumes_client.update_volume_image_metadata(self.volume['id'],
                                                          **image_metadata)
 
-        # Fetch image metadata from the volume
+        # Fetch volume's image metadata by show_volume method
         volume_image_metadata = self.volumes_client.show_volume(
             self.volume['id'])['volume']['volume_image_metadata']
 
@@ -62,9 +62,9 @@
                                                          'ramdisk_id')
         del image_metadata['ramdisk_id']
 
-        # Fetch the new image metadata from the volume
-        volume_image_metadata = self.volumes_client.show_volume(
-            self.volume['id'])['volume']['volume_image_metadata']
+        # Fetch volume's image metadata by show_volume_image_metadata method
+        volume_image_metadata = self.volumes_client.show_volume_image_metadata(
+            self.volume['id'])['metadata']
 
         # Verify image metadata was updated after item deletion
         self.assertThat(volume_image_metadata.items(),
diff --git a/tempest/cmd/verify_tempest_config.py b/tempest/cmd/verify_tempest_config.py
index 8e71ecc..714a476 100644
--- a/tempest/cmd/verify_tempest_config.py
+++ b/tempest/cmd/verify_tempest_config.py
@@ -30,6 +30,8 @@
 from tempest.common import credentials_factory as credentials
 from tempest import config
 import tempest.lib.common.http
+from tempest.lib import exceptions as lib_exc
+from tempest.services import object_storage
 
 
 CONF = config.CONF
@@ -69,7 +71,25 @@
 
 def verify_glance_api_versions(os, update):
     # Check glance api versions
-    _, versions = os.image_client.get_versions()
+    # Since we want to verify that the configuration is correct, we cannot
+    # rely on a specific version of the API being available.
+    try:
+        _, versions = os.image_v1.ImagesClient().get_versions()
+    except lib_exc.NotFound:
+        # If not found, we use v2. The assumption is that either v1 or v2
+        # are available, since glance is marked as available in the catalog.
+        # If not, glance should be disabled in Tempest conf.
+        try:
+            versions = os.image_v2.VersionsClient().list_versions()['versions']
+            versions = [x['id'] for x in versions]
+        except lib_exc.NotFound:
+            msg = ('Glance is available in the catalog, but no known version, '
+                   '(v1.x or v2.x) of Glance could be found, so Glance should '
+                   'be configured as not available')
+            LOG.warn(msg)
+            print_and_or_update('glance', 'service-available', False, update)
+            return
+
     if CONF.image_feature_enabled.api_v1 != contains_version('v1.', versions):
         print_and_or_update('api_v1', 'image-feature-enabled',
                             not CONF.image_feature_enabled.api_v1, update)
@@ -92,10 +112,15 @@
 
 
 def _get_api_versions(os, service):
+    # Clients are used to obtain the base_url. Each client applies the
+    # appropriate filters to the catalog to extract a base_url which
+    # matches the configured region and endpoint_type.
+    # The base URL is used to obtain the list of versions available.
     client_dict = {
-        'nova': os.servers_client,
-        'keystone': os.identity_client,
-        'cinder': os.volumes_client_latest,
+        'nova': os.compute.ServersClient(),
+        'keystone': os.identity_v3.IdentityClient(
+            endpoint_type=CONF.identity.v3_endpoint_type),
+        'cinder': os.volume_v3.VolumesClient(),
     }
     if service != 'keystone' and service != 'cinder':
         # Since keystone and cinder may be listening on a path,
@@ -166,14 +191,15 @@
 
 
 def get_extension_client(os, service):
+    params = config.service_client_config('object-storage')
     extensions_client = {
-        'nova': os.extensions_client,
-        'neutron': os.network_extensions_client,
-        'swift': os.capabilities_client,
+        'nova': os.compute.ExtensionsClient(),
+        'neutron': os.network.ExtensionsClient(),
+        'swift': object_storage.CapabilitiesClient(os.auth_provider, **params),
         # NOTE: Cinder v3 API is current and v2 and v1 are deprecated.
         # V3 extension API is the same as v2, so we reuse the v2 client
         # for v3 API also.
-        'cinder': os.volumes_v2_extension_client,
+        'cinder': os.volume_v2.ExtensionsClient(),
     }
 
     if service not in extensions_client:
diff --git a/tempest/common/credentials_factory.py b/tempest/common/credentials_factory.py
index 5dc1a3e..cecb8e3 100644
--- a/tempest/common/credentials_factory.py
+++ b/tempest/common/credentials_factory.py
@@ -265,8 +265,6 @@
     return credentials
 
 
-# Wrapper around auth.get_credentials to use the configured identity version
-# if none is specified
 def get_credentials(fill_in=True, identity_version=None, **kwargs):
     """Get credentials from dict based on config
 
diff --git a/tempest/lib/services/volume/v2/volumes_client.py b/tempest/lib/services/volume/v2/volumes_client.py
index 62b9992..e932adc 100644
--- a/tempest/lib/services/volume/v2/volumes_client.py
+++ b/tempest/lib/services/volume/v2/volumes_client.py
@@ -355,6 +355,15 @@
         self.expected_success(200, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def show_volume_image_metadata(self, volume_id):
+        """Show image metadata for the volume."""
+        post_body = json.dumps({'os-show_image_metadata': {}})
+        url = "volumes/%s/action" % volume_id
+        resp, body = self.post(url, post_body)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     @removals.remove(message="use list_pools from tempest.lib.services."
                              "volume.v2.scheduler_stats_client")
     def show_pools(self, detail=False):
diff --git a/tempest/lib/services/volume/v3/groups_client.py b/tempest/lib/services/volume/v3/groups_client.py
index 9b53bb7..e261e8e 100644
--- a/tempest/lib/services/volume/v3/groups_client.py
+++ b/tempest/lib/services/volume/v3/groups_client.py
@@ -84,6 +84,19 @@
         self.expected_success(200, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def create_group_from_source(self, **kwargs):
+        """Creates a group from source.
+
+        For a full list of available parameters, please refer to the official
+        API reference:
+        https://developer.openstack.org/api-ref/block-storage/v3/#create-group-from-source
+        """
+        post_body = json.dumps({'create-from-src': kwargs})
+        resp, body = self.post('groups/action', post_body)
+        body = json.loads(body)
+        self.expected_success(202, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def is_resource_deleted(self, id):
         try:
             self.show_group(id)
diff --git a/tempest/tests/cmd/test_verify_tempest_config.py b/tempest/tests/cmd/test_verify_tempest_config.py
index 1415111..810f9e5 100644
--- a/tempest/tests/cmd/test_verify_tempest_config.py
+++ b/tempest/tests/cmd/test_verify_tempest_config.py
@@ -16,9 +16,13 @@
 import mock
 from oslo_serialization import jsonutils as json
 
+from tempest import clients
 from tempest.cmd import verify_tempest_config
+from tempest.common import credentials_factory
 from tempest import config
+from tempest.lib.common import rest_client
 from tempest.lib.common.utils import data_utils
+from tempest.lib import exceptions as lib_exc
 from tempest.tests import base
 from tempest.tests import fake_config
 
@@ -234,10 +238,15 @@
         print_mock.assert_not_called()
 
     def test_verify_glance_version_no_v2_with_v1_1(self):
-        def fake_get_versions():
-            return (None, ['v1.1'])
+        # This test verifies that wrong config api_v2 = True is detected
+        class FakeClient(object):
+            def get_versions(self):
+                return (None, ['v1.0'])
+
         fake_os = mock.MagicMock()
-        fake_os.image_client.get_versions = fake_get_versions
+        fake_module = mock.MagicMock()
+        fake_module.ImagesClient = FakeClient
+        fake_os.image_v1 = fake_module
         with mock.patch.object(verify_tempest_config,
                                'print_and_or_update') as print_mock:
             verify_tempest_config.verify_glance_api_versions(fake_os, True)
@@ -245,10 +254,15 @@
                                            False, True)
 
     def test_verify_glance_version_no_v2_with_v1_0(self):
-        def fake_get_versions():
-            return (None, ['v1.0'])
+        # This test verifies that wrong config api_v2 = True is detected
+        class FakeClient(object):
+            def get_versions(self):
+                return (None, ['v1.0'])
+
         fake_os = mock.MagicMock()
-        fake_os.image_client.get_versions = fake_get_versions
+        fake_module = mock.MagicMock()
+        fake_module.ImagesClient = FakeClient
+        fake_os.image_v1 = fake_module
         with mock.patch.object(verify_tempest_config,
                                'print_and_or_update') as print_mock:
             verify_tempest_config.verify_glance_api_versions(fake_os, True)
@@ -256,24 +270,59 @@
                                            False, True)
 
     def test_verify_glance_version_no_v1(self):
-        def fake_get_versions():
-            return (None, ['v2.0'])
+        # This test verifies that wrong config api_v1 = True is detected
+        class FakeClient(object):
+            def get_versions(self):
+                raise lib_exc.NotFound()
+
+            def list_versions(self):
+                return {'versions': [{'id': 'v2.0'}]}
+
         fake_os = mock.MagicMock()
-        fake_os.image_client.get_versions = fake_get_versions
+        fake_module = mock.MagicMock()
+        fake_module.ImagesClient = FakeClient
+        fake_module.VersionsClient = FakeClient
+        fake_os.image_v1 = fake_module
+        fake_os.image_v2 = fake_module
         with mock.patch.object(verify_tempest_config,
                                'print_and_or_update') as print_mock:
             verify_tempest_config.verify_glance_api_versions(fake_os, True)
         print_mock.assert_called_once_with('api_v1', 'image-feature-enabled',
                                            False, True)
 
+    def test_verify_glance_version_no_version(self):
+        # This test verifies that wrong config api_v1 = True is detected
+        class FakeClient(object):
+            def get_versions(self):
+                raise lib_exc.NotFound()
+
+            def list_versions(self):
+                raise lib_exc.NotFound()
+
+        fake_os = mock.MagicMock()
+        fake_module = mock.MagicMock()
+        fake_module.ImagesClient = FakeClient
+        fake_module.VersionsClient = FakeClient
+        fake_os.image_v1 = fake_module
+        fake_os.image_v2 = fake_module
+        with mock.patch.object(verify_tempest_config,
+                               'print_and_or_update') as print_mock:
+            verify_tempest_config.verify_glance_api_versions(fake_os, True)
+        print_mock.assert_called_once_with('glance',
+                                           'service-available',
+                                           False, True)
+
     def test_verify_extensions_neutron(self):
         def fake_list_extensions():
             return {'extensions': [{'alias': 'fake1'},
                                    {'alias': 'fake2'},
                                    {'alias': 'not_fake'}]}
         fake_os = mock.MagicMock()
-        fake_os.network_extensions_client.list_extensions = (
-            fake_list_extensions)
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['fake1', 'fake2', 'fake3'])))
@@ -295,8 +344,11 @@
                                    {'alias': 'fake2'},
                                    {'alias': 'not_fake'}]}
         fake_os = mock.MagicMock()
-        fake_os.network_extensions_client.list_extensions = (
-            fake_list_extensions)
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['all'])))
@@ -313,15 +365,17 @@
                                    {'alias': 'fake2'},
                                    {'alias': 'not_fake'}]}
         fake_os = mock.MagicMock()
-        # NOTE (e0ne): mock both v1 and v2 APIs
-        fake_os.volumes_extension_client.list_extensions = fake_list_extensions
-        fake_os.volumes_v2_extension_client.list_extensions = (
-            fake_list_extensions)
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['fake1', 'fake2', 'fake3'])))
         results = verify_tempest_config.verify_extensions(fake_os,
                                                           'cinder', {})
+
         self.assertIn('cinder', results)
         self.assertIn('fake1', results['cinder'])
         self.assertTrue(results['cinder']['fake1'])
@@ -338,10 +392,11 @@
                                    {'alias': 'fake2'},
                                    {'alias': 'not_fake'}]}
         fake_os = mock.MagicMock()
-        # NOTE (e0ne): mock both v1 and v2 APIs
-        fake_os.volumes_extension_client.list_extensions = fake_list_extensions
-        fake_os.volumes_v2_extension_client.list_extensions = (
-            fake_list_extensions)
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['all'])))
@@ -357,7 +412,11 @@
             return ([{'alias': 'fake1'}, {'alias': 'fake2'},
                      {'alias': 'not_fake'}])
         fake_os = mock.MagicMock()
-        fake_os.extensions_client.list_extensions = fake_list_extensions
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['fake1', 'fake2', 'fake3'])))
@@ -379,7 +438,11 @@
                                     {'alias': 'fake2'},
                                     {'alias': 'not_fake'}]})
         fake_os = mock.MagicMock()
-        fake_os.extensions_client.list_extensions = fake_list_extensions
+        fake_client = mock.MagicMock()
+        fake_client.list_extensions = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['all'])))
@@ -397,7 +460,11 @@
                     'not_fake': 'metadata',
                     'swift': 'metadata'}
         fake_os = mock.MagicMock()
-        fake_os.capabilities_client.list_capabilities = fake_list_extensions
+        fake_client = mock.MagicMock()
+        fake_client.list_capabilities = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['fake1', 'fake2', 'fake3'])))
@@ -419,7 +486,11 @@
                     'not_fake': 'metadata',
                     'swift': 'metadata'}
         fake_os = mock.MagicMock()
-        fake_os.capabilities_client.list_capabilities = fake_list_extensions
+        fake_client = mock.MagicMock()
+        fake_client.list_capabilities = fake_list_extensions
+        self.useFixture(fixtures.MockPatchObject(
+            verify_tempest_config, 'get_extension_client',
+            return_value=fake_client))
         self.useFixture(fixtures.MockPatchObject(
             verify_tempest_config, 'get_enabled_extensions',
             return_value=(['all'])))
@@ -429,3 +500,13 @@
         self.assertIn('extensions', results['swift'])
         self.assertEqual(sorted(['not_fake', 'fake1', 'fake2']),
                          sorted(results['swift']['extensions']))
+
+    def test_get_extension_client(self):
+        creds = credentials_factory.get_credentials(
+            fill_in=False, username='fake_user', project_name='fake_project',
+            password='fake_password')
+        os = clients.Manager(creds)
+        for service in ['nova', 'neutron', 'swift', 'cinder']:
+            extensions_client = verify_tempest_config.get_extension_client(
+                os, service)
+            self.assertIsInstance(extensions_client, rest_client.RestClient)
diff --git a/tempest/tests/lib/services/image/v2/test_images_client.py b/tempest/tests/lib/services/image/v2/test_images_client.py
index 9648985..ee4d4cb 100644
--- a/tempest/tests/lib/services/image/v2/test_images_client.py
+++ b/tempest/tests/lib/services/image/v2/test_images_client.py
@@ -12,6 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import six
+
+from tempest.lib.common.utils import data_utils
 from tempest.lib.services.image.v2 import images_client
 from tempest.tests.lib import fake_auth_provider
 from tempest.tests.lib.services import base
@@ -42,6 +45,57 @@
         "container_format": None
     }
 
+    FAKE_LIST_IMAGES = {
+        "images": [
+            {
+                "status": "active",
+                "name": "cirros-0.3.2-x86_64-disk",
+                "tags": [],
+                "container_format": "bare",
+                "created_at": "2014-11-07T17:07:06Z",
+                "disk_format": "qcow2",
+                "updated_at": "2014-11-07T17:19:09Z",
+                "visibility": "public",
+                "self": "/v2/images/1bea47ed-f6a9-463b-b423-14b9cca9ad27",
+                "min_disk": 0,
+                "protected": False,
+                "id": "1bea47ed-f6a9-463b-b423-14b9cca9ad27",
+                "file": "/v2/images/1bea47ed-f6a9-463b-b423-14b9cca9ad27/file",
+                "checksum": "64d7c1cd2b6f60c92c14662941cb7913",
+                "owner": "5ef70662f8b34079a6eddb8da9d75fe8",
+                "size": 13167616,
+                "min_ram": 0,
+                "schema": "/v2/schemas/image",
+                "virtual_size": None
+            },
+            {
+                "status": "active",
+                "name": "F17-x86_64-cfntools",
+                "tags": [],
+                "container_format": "bare",
+                "created_at": "2014-10-30T08:23:39Z",
+                "disk_format": "qcow2",
+                "updated_at": "2014-11-03T16:40:10Z",
+                "visibility": "public",
+                "self": "/v2/images/781b3762-9469-4cec-b58d-3349e5de4e9c",
+                "min_disk": 0,
+                "protected": False,
+                "id": "781b3762-9469-4cec-b58d-3349e5de4e9c",
+                "file": "/v2/images/781b3762-9469-4cec-b58d-3349e5de4e9c/file",
+                "checksum": "afab0f79bac770d61d24b4d0560b5f70",
+                "owner": "5ef70662f8b34079a6eddb8da9d75fe8",
+                "size": 476704768,
+                "min_ram": 0,
+                "schema": "/v2/schemas/image",
+                "virtual_size": None
+            }
+        ],
+        "schema": "/v2/schemas/images",
+        "first": "/v2/images"
+    }
+
+    FAKE_TAG_NAME = "fake tag"
+
     def setUp(self):
         super(TestImagesClient, self).setUp()
         fake_auth = fake_auth_provider.FakeAuthProvider()
@@ -74,6 +128,14 @@
             bytes_body,
             image_id="e485aab9-0907-4973-921c-bb6da8a8fcf8")
 
+    def _test_list_images(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_images,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_IMAGES,
+            bytes_body,
+            mock_args=['images'])
+
     def test_create_image_with_str_body(self):
         self._test_create_image()
 
@@ -104,8 +166,56 @@
             'tempest.lib.common.rest_client.RestClient.delete',
             {}, image_id="e485aab9-0907-4973-921c-bb6da8a8fcf8", status=204)
 
+    def test_store_image_file(self):
+        data = six.BytesIO(data_utils.random_bytes())
+
+        self.check_service_client_function(
+            self.client.store_image_file,
+            'tempest.lib.common.rest_client.RestClient.raw_request',
+            {},
+            image_id=self.FAKE_CREATE_UPDATE_SHOW_IMAGE["id"],
+            status=204,
+            data=data)
+
+    def test_show_image_file(self):
+        # NOTE: The response for this API returns raw binary data, but an error
+        # is thrown if random bytes are used for the resp body since
+        # ``create_response`` then calls ``json.dumps``.
+        self.check_service_client_function(
+            self.client.show_image_file,
+            'tempest.lib.common.rest_client.RestClient.get',
+            {},
+            resp_as_string=True,
+            image_id=self.FAKE_CREATE_UPDATE_SHOW_IMAGE["id"],
+            headers={'Content-Type': 'application/octet-stream'},
+            status=200)
+
+    def test_add_image_tag(self):
+        self.check_service_client_function(
+            self.client.add_image_tag,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            image_id=self.FAKE_CREATE_UPDATE_SHOW_IMAGE["id"],
+            status=204,
+            tag=self.FAKE_TAG_NAME)
+
+    def test_delete_image_tag(self):
+        self.check_service_client_function(
+            self.client.delete_image_tag,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            image_id=self.FAKE_CREATE_UPDATE_SHOW_IMAGE["id"],
+            status=204,
+            tag=self.FAKE_TAG_NAME)
+
     def test_show_image_with_str_body(self):
         self._test_show_image()
 
     def test_show_image_with_bytes_body(self):
         self._test_show_image(bytes_body=True)
+
+    def test_list_images_with_str_body(self):
+        self._test_list_images()
+
+    def test_list_images_with_bytes_body(self):
+        self._test_list_images(bytes_body=True)
diff --git a/tempest/tests/lib/services/volume/v2/test_volumes_client.py b/tempest/tests/lib/services/volume/v2/test_volumes_client.py
index e53e0a2..d7b042e 100644
--- a/tempest/tests/lib/services/volume/v2/test_volumes_client.py
+++ b/tempest/tests/lib/services/volume/v2/test_volumes_client.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from oslo_serialization import jsonutils as json
+
 from tempest.lib.services.volume.v2 import volumes_client
 from tempest.tests.lib import fake_auth_provider
 from tempest.tests.lib.services import base
@@ -26,6 +28,19 @@
         }
     }
 
+    FAKE_VOLUME_IMAGE_METADATA = {
+        "metadata": {
+            "container_format": "bare",
+            "min_ram": "0",
+            "disk_format": "raw",
+            "image_name": "xly-ubuntu16-server",
+            "image_id": "3e087b0c-10c5-4255-b147-6e8e9dbad6fc",
+            "checksum": "008f5d22fe3cb825d714da79607a90f9",
+            "min_disk": "0",
+            "size": "8589934592"
+        }
+    }
+
     def setUp(self):
         super(TestVolumesClient, self).setUp()
         fake_auth = fake_auth_provider.FakeAuthProvider()
@@ -76,6 +91,17 @@
             volume_id="a3be971b-8de5-4bdf-bdb8-3d8eb0fb69f8",
             id="key1")
 
+    def _test_show_volume_image_metadata(self, bytes_body=False):
+        fake_volume_id = "a3be971b-8de5-4bdf-bdb8-3d8eb0fb69f8"
+        self.check_service_client_function(
+            self.client.show_volume_image_metadata,
+            'tempest.lib.common.rest_client.RestClient.post',
+            self.FAKE_VOLUME_IMAGE_METADATA,
+            to_utf=bytes_body,
+            mock_args=['volumes/%s/action' % fake_volume_id,
+                       json.dumps({"os-show_image_metadata": {}})],
+            volume_id=fake_volume_id)
+
     def test_force_detach_volume_with_str_body(self):
         self._test_force_detach_volume()
 
@@ -88,6 +114,12 @@
     def test_show_volume_metadata_item_with_bytes_body(self):
         self._test_show_volume_metadata_item(bytes_body=True)
 
+    def test_show_volume_image_metadata_with_str_body(self):
+        self._test_show_volume_image_metadata()
+
+    def test_show_volume_image_metadata_with_bytes_body(self):
+        self._test_show_volume_image_metadata(bytes_body=True)
+
     def test_retype_volume_with_str_body(self):
         self._test_retype_volume()
 
diff --git a/tempest/tests/lib/services/volume/v3/test_groups_client.py b/tempest/tests/lib/services/volume/v3/test_groups_client.py
index 00db5b4..4d0d860 100644
--- a/tempest/tests/lib/services/volume/v3/test_groups_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_groups_client.py
@@ -28,6 +28,22 @@
         }
     }
 
+    FAKE_CREATE_GROUP_FROM_GROUP_SNAPSHOT = {
+        "create-from-src": {
+            "name": "group-002",
+            "description": "Test group 2",
+            "group_snapshot_id": "79c9afdb-7e46-4d71-9249-1f022886963c",
+        }
+    }
+
+    FAKE_CREATE_GROUP_FROM_GROUP = {
+        "create-from-src": {
+            "name": "group-003",
+            "description": "Test group 3",
+            "source_group_id": "e92f9dc7-0b20-492d-8ab2-3ad8fdac270e",
+        }
+    }
+
     FAKE_INFO_GROUP = {
         "group": {
             "id": "0e701ab8-1bec-4b9f-b026-a7ba4af13578",
@@ -134,3 +150,17 @@
             {},
             group_id='0e701ab8-1bec-4b9f-b026-a7ba4af13578',
             status=202)
+
+    def test_create_group_from_group_snapshot(self):
+        self.check_service_client_function(
+            self.client.create_group_from_source,
+            'tempest.lib.common.rest_client.RestClient.post',
+            self.FAKE_CREATE_GROUP_FROM_GROUP_SNAPSHOT,
+            status=202)
+
+    def test_create_group_from_group(self):
+        self.check_service_client_function(
+            self.client.create_group_from_source,
+            'tempest.lib.common.rest_client.RestClient.post',
+            self.FAKE_CREATE_GROUP_FROM_GROUP,
+            status=202)