diff --git a/releasenotes/notes/Tempest-library-interface-0eb680b810139a50.yaml b/releasenotes/notes/10.0.0-Tempest-library-interface-0eb680b810139a50.yaml
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diff --git a/releasenotes/notes/start-using-reno-ed9518126fd0e1a3.yaml b/releasenotes/notes/10.0.0-start-using-reno-ed9518126fd0e1a3.yaml
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diff --git a/releasenotes/notes/api-microversion-testing-support-2ceddd2255670932.yaml b/releasenotes/notes/11.0.0-api-microversion-testing-support-2ceddd2255670932.yaml
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diff --git a/releasenotes/notes/compute-microversion-support-e0b23f960f894b9b.yaml b/releasenotes/notes/11.0.0-compute-microversion-support-e0b23f960f894b9b.yaml
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diff --git a/releasenotes/notes/add-network-versions-client-d90e8334e1443f5c.yaml b/releasenotes/notes/12.1.0-add-network-versions-client-d90e8334e1443f5c.yaml
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diff --git a/releasenotes/notes/add-scope-to-auth-b5a82493ea89f41e.yaml b/releasenotes/notes/12.1.0-add-scope-to-auth-b5a82493ea89f41e.yaml
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diff --git a/releasenotes/notes/add-tempest-run-3d0aaf69c2ca4115.yaml b/releasenotes/notes/12.1.0-add-tempest-run-3d0aaf69c2ca4115.yaml
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diff --git a/releasenotes/notes/add-tempest-workspaces-228a2ba4690b5589.yaml b/releasenotes/notes/12.1.0-add-tempest-workspaces-228a2ba4690b5589.yaml
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diff --git a/releasenotes/notes/add_subunit_describe_calls-5498a37e6cd66c4b.yaml b/releasenotes/notes/12.1.0-add_subunit_describe_calls-5498a37e6cd66c4b.yaml
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diff --git a/releasenotes/notes/bug-1486834-7ebca15836ae27a9.yaml b/releasenotes/notes/12.1.0-bug-1486834-7ebca15836ae27a9.yaml
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diff --git a/releasenotes/notes/identity-clients-as-library-e663c6132fcac6c2.yaml b/releasenotes/notes/12.1.0-identity-clients-as-library-e663c6132fcac6c2.yaml
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diff --git a/releasenotes/notes/image-clients-as-library-86d17caa26ce3961.yaml b/releasenotes/notes/12.1.0-image-clients-as-library-86d17caa26ce3961.yaml
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diff --git a/releasenotes/notes/new-test-utils-module-adf34468c4d52719.yaml b/releasenotes/notes/12.1.0-new-test-utils-module-adf34468c4d52719.yaml
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diff --git a/releasenotes/notes/remove-input-scenarios-functionality-01308e6d4307f580.yaml b/releasenotes/notes/12.1.0-remove-input-scenarios-functionality-01308e6d4307f580.yaml
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diff --git a/releasenotes/notes/remove-integrated-horizon-bb57551c1e5f5be3.yaml b/releasenotes/notes/12.1.0-remove-integrated-horizon-bb57551c1e5f5be3.yaml
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diff --git a/releasenotes/notes/remove-legacy-credential-providers-3d653ac3ba1ada2b.yaml b/releasenotes/notes/12.1.0-remove-legacy-credential-providers-3d653ac3ba1ada2b.yaml
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diff --git a/releasenotes/notes/remove-trove-tests-666522e9113549f9.yaml b/releasenotes/notes/12.1.0-remove-trove-tests-666522e9113549f9.yaml
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diff --git a/releasenotes/notes/routers-client-as-library-25a363379da351f6.yaml b/releasenotes/notes/12.1.0-routers-client-as-library-25a363379da351f6.yaml
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diff --git a/releasenotes/notes/support-chunked-encoding-d71f53225f68edf3.yaml b/releasenotes/notes/12.1.0-support-chunked-encoding-d71f53225f68edf3.yaml
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diff --git a/releasenotes/notes/tempest-init-global-config-dir-location-changes-12260255871d3a2b.yaml b/releasenotes/notes/12.1.0-tempest-init-global-config-dir-location-changes-12260255871d3a2b.yaml
similarity index 100%
rename from releasenotes/notes/tempest-init-global-config-dir-location-changes-12260255871d3a2b.yaml
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diff --git a/releasenotes/notes/add-volume-clients-as-a-library-d05b6bc35e66c6ef.yaml b/releasenotes/notes/add-volume-clients-as-a-library-d05b6bc35e66c6ef.yaml
new file mode 100644
index 0000000..8125ab9
--- /dev/null
+++ b/releasenotes/notes/add-volume-clients-as-a-library-d05b6bc35e66c6ef.yaml
@@ -0,0 +1,12 @@
+---
+features:
+  - |
+    Define volume service clients as libraries.
+    The following volume service clients are defined as library interface,
+    so the other projects can use these modules as stable libraries without
+    any maintenance changes.
+
+    * encryption_types_client (v1)
+    * snapshots_client (v1)
+    * snapshots_client (v2)
+
diff --git a/tempest/services/volume/base/base_snapshots_client.py b/tempest/lib/services/volume/v1/snapshots_client.py
old mode 100755
new mode 100644
similarity index 91%
copy from tempest/services/volume/base/base_snapshots_client.py
copy to tempest/lib/services/volume/v1/snapshots_client.py
index 38a6dc7..1881078
--- a/tempest/services/volume/base/base_snapshots_client.py
+++ b/tempest/lib/services/volume/v1/snapshots_client.py
@@ -17,8 +17,8 @@
 from tempest.lib import exceptions as lib_exc
 
 
-class BaseSnapshotsClient(rest_client.RestClient):
-    """Base Client class to send CRUD Volume API requests."""
+class SnapshotsClient(rest_client.RestClient):
+    """Client class to send CRUD Volume V1 API requests."""
 
     create_resp = 200
 
@@ -26,7 +26,7 @@
         """List all the snapshot.
 
         Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#listSnapshots
+                              api-ref-blockstorage-v1.html#listSnapshots
         """
         url = 'snapshots'
         if detail:
@@ -43,7 +43,7 @@
         """Returns the details of a single snapshot.
 
         Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#showSnapshot
+                              api-ref-blockstorage-v1.html#showSnapshot
         """
         url = "snapshots/%s" % snapshot_id
         resp, body = self.get(url)
@@ -55,7 +55,7 @@
         """Creates a new snapshot.
 
         Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#createSnapshot
+                              api-ref-blockstorage-v1.html#createSnapshot
         """
         post_body = json.dumps({'snapshot': kwargs})
         resp, body = self.post('snapshots', post_body)
@@ -63,23 +63,11 @@
         self.expected_success(self.create_resp, resp.status)
         return rest_client.ResponseBody(resp, body)
 
-    def update_snapshot(self, snapshot_id, **kwargs):
-        """Updates a snapshot.
-
-        Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#updateSnapshot
-        """
-        put_body = json.dumps({'snapshot': kwargs})
-        resp, body = self.put('snapshots/%s' % snapshot_id, put_body)
-        body = json.loads(body)
-        self.expected_success(200, resp.status)
-        return rest_client.ResponseBody(resp, body)
-
     def delete_snapshot(self, snapshot_id):
         """Delete Snapshot.
 
         Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#deleteSnapshot
+                              api-ref-blockstorage-v1.html#deleteSnapshot
         """
         resp, body = self.delete("snapshots/%s" % snapshot_id)
         self.expected_success(202, resp.status)
@@ -126,11 +114,24 @@
         self.expected_success(200, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def update_snapshot(self, snapshot_id, **kwargs):
+        """Updates a snapshot.
+
+        Available params: see http://developer.openstack.org/
+                              api-ref-blockstorage-v1.html#
+                              updateSnapshotMetadata
+        """
+        put_body = json.dumps({'snapshot': kwargs})
+        resp, body = self.put('snapshots/%s' % snapshot_id, put_body)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def show_snapshot_metadata(self, snapshot_id):
         """Get metadata of the snapshot.
 
         Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#
+                              api-ref-blockstorage-v1.html#
                               showSnapshotMetadata
         """
         url = "snapshots/%s/metadata" % snapshot_id
@@ -143,7 +144,7 @@
         """Update metadata for the snapshot.
 
         Available params: see http://developer.openstack.org/
-                              api-ref-blockstorage-v2.html#
+                              api-ref-blockstorage-v1.html#
                               updateSnapshotMetadata
         """
         put_body = json.dumps(kwargs)
diff --git a/tempest/services/volume/base/base_snapshots_client.py b/tempest/lib/services/volume/v2/snapshots_client.py
old mode 100755
new mode 100644
similarity index 97%
rename from tempest/services/volume/base/base_snapshots_client.py
rename to tempest/lib/services/volume/v2/snapshots_client.py
index 38a6dc7..c84e557
--- a/tempest/services/volume/base/base_snapshots_client.py
+++ b/tempest/lib/services/volume/v2/snapshots_client.py
@@ -17,10 +17,10 @@
 from tempest.lib import exceptions as lib_exc
 
 
-class BaseSnapshotsClient(rest_client.RestClient):
-    """Base Client class to send CRUD Volume API requests."""
-
-    create_resp = 200
+class SnapshotsClient(rest_client.RestClient):
+    """Client class to send CRUD Volume V2 API requests."""
+    api_version = "v2"
+    create_resp = 202
 
     def list_snapshots(self, detail=False, **params):
         """List all the snapshot.
diff --git a/tempest/services/volume/v1/__init__.py b/tempest/services/volume/v1/__init__.py
index a7d9270..02eaa7f 100644
--- a/tempest/services/volume/v1/__init__.py
+++ b/tempest/services/volume/v1/__init__.py
@@ -20,13 +20,13 @@
 from tempest.lib.services.volume.v1.hosts_client import HostsClient
 from tempest.lib.services.volume.v1.quotas_client import QuotasClient
 from tempest.lib.services.volume.v1.services_client import ServicesClient
+from tempest.lib.services.volume.v1.snapshots_client import SnapshotsClient
 from tempest.lib.services.volume.v1.types_client import TypesClient
 from tempest.services.volume.v1.json.backups_client import BackupsClient
 from tempest.services.volume.v1.json.qos_client import QosSpecsClient
-from tempest.services.volume.v1.json.snapshots_client import SnapshotsClient
 from tempest.services.volume.v1.json.volumes_client import VolumesClient
 
 __all__ = ['AvailabilityZoneClient', 'EncryptionTypesClient',
            'ExtensionsClient', 'HostsClient', 'QuotasClient', 'ServicesClient',
-           'TypesClient', 'BackupsClient', 'QosSpecsClient', 'SnapshotsClient',
+           'SnapshotsClient', 'TypesClient', 'BackupsClient', 'QosSpecsClient',
            'VolumesClient', ]
diff --git a/tempest/services/volume/v1/json/snapshots_client.py b/tempest/services/volume/v1/json/snapshots_client.py
deleted file mode 100644
index b039c2b..0000000
--- a/tempest/services/volume/v1/json/snapshots_client.py
+++ /dev/null
@@ -1,17 +0,0 @@
-#    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.
-
-from tempest.services.volume.base import base_snapshots_client
-
-
-class SnapshotsClient(base_snapshots_client.BaseSnapshotsClient):
-    """Client class to send CRUD Volume V1 API requests."""
diff --git a/tempest/services/volume/v2/__init__.py b/tempest/services/volume/v2/__init__.py
index c99a81a..58f7af4 100644
--- a/tempest/services/volume/v2/__init__.py
+++ b/tempest/services/volume/v2/__init__.py
@@ -18,15 +18,15 @@
 from tempest.lib.services.volume.v2.hosts_client import HostsClient
 from tempest.lib.services.volume.v2.quotas_client import QuotasClient
 from tempest.lib.services.volume.v2.services_client import ServicesClient
+from tempest.lib.services.volume.v2.snapshots_client import SnapshotsClient
 from tempest.lib.services.volume.v2.types_client import TypesClient
 from tempest.services.volume.v2.json.backups_client import BackupsClient
 from tempest.services.volume.v2.json.encryption_types_client import \
     EncryptionTypesClient
 from tempest.services.volume.v2.json.qos_client import QosSpecsClient
-from tempest.services.volume.v2.json.snapshots_client import SnapshotsClient
 from tempest.services.volume.v2.json.volumes_client import VolumesClient
 
 __all__ = ['AvailabilityZoneClient', 'ExtensionsClient', 'HostsClient',
-           'QuotasClient', 'ServicesClient', 'TypesClient', 'BackupsClient',
-           'EncryptionTypesClient', 'QosSpecsClient', 'SnapshotsClient',
+           'QuotasClient', 'ServicesClient', 'SnapshotsClient', 'TypesClient',
+           'BackupsClient', 'EncryptionTypesClient', 'QosSpecsClient',
            'VolumesClient', ]
diff --git a/tempest/services/volume/v2/json/snapshots_client.py b/tempest/services/volume/v2/json/snapshots_client.py
deleted file mode 100644
index a2d415f..0000000
--- a/tempest/services/volume/v2/json/snapshots_client.py
+++ /dev/null
@@ -1,19 +0,0 @@
-#    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.
-
-from tempest.services.volume.base import base_snapshots_client
-
-
-class SnapshotsClient(base_snapshots_client.BaseSnapshotsClient):
-    """Client class to send CRUD Volume V2 API requests."""
-    api_version = "v2"
-    create_resp = 202