diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index 572d425..adbd2dc 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -247,3 +247,9 @@
  * `2.42`_
 
  .. _2.42: http://docs.openstack.org/developer/nova/api_microversion_history.html#maximum-in-ocata
+
+* Volume
+
+ * `3.3`_
+
+ .. _3.3:  https://docs.openstack.org/developer/cinder/devref/api_microversion_history.html#id4
diff --git a/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml b/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml
new file mode 100644
index 0000000..0075a36
--- /dev/null
+++ b/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml
@@ -0,0 +1,9 @@
+---
+upgrade:
+  - The ``JSON_ENC`` and ``TXT_ENC`` option in the ``_error_checker``
+    section have been added with additional content-type which are
+    defined in RFC7231 but missing in the currnt rest_client.py file.
+    The lack of these additional content-type will cause defcore test
+    to fail for OpenStack public cloud which uses tomcat module in the
+    api gateway. The additions are ``application/json;charset=utf-8``,
+    ``text/html;charset=utf-8``,``text/plain;charset=utf-8``
\ No newline at end of file
diff --git a/releasenotes/notes/add-tempest-lib-remote-client-adbeb3f42a36910b.yaml b/releasenotes/notes/add-tempest-lib-remote-client-adbeb3f42a36910b.yaml
new file mode 100644
index 0000000..c21751b
--- /dev/null
+++ b/releasenotes/notes/add-tempest-lib-remote-client-adbeb3f42a36910b.yaml
@@ -0,0 +1,10 @@
+---
+features:
+  - Add remote_client under tempest.lib.
+    This remote_client under tempest.lib is defined as stable
+    interface, and now this module provides the following
+    essential methods.
+
+      * exec_command
+      * validate_authentication
+      * ping_host
diff --git a/releasenotes/notes/fix-volume-v2-service-clients-bugfix-1667354-73d2c3c8fedc08bf.yaml b/releasenotes/notes/fix-volume-v2-service-clients-bugfix-1667354-73d2c3c8fedc08bf.yaml
new file mode 100644
index 0000000..6d31576
--- /dev/null
+++ b/releasenotes/notes/fix-volume-v2-service-clients-bugfix-1667354-73d2c3c8fedc08bf.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fix below volume v2 service clients to make v2 API call: Bug#1667354
+
+    - SchedulerStatsClient
+    - CapabilitiesClient
diff --git a/releasenotes/notes/remove-sahara-service-available-44a642aa9c634ab4.yaml b/releasenotes/notes/remove-sahara-service-available-44a642aa9c634ab4.yaml
new file mode 100644
index 0000000..c0dc7d7
--- /dev/null
+++ b/releasenotes/notes/remove-sahara-service-available-44a642aa9c634ab4.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    The 'sahara' config option in the 'service-available' group has been moved to the sahara plugin
+    (openstack/sahara-tests) along with tests and service client during the Ocata timeframe.
+    A 'sahara' config option was left over on Tempest side, and it's removed now.
+    As long as the sahara plugin is installed, this change as no impact on users of sahara tests.
diff --git a/tempest/api/object_storage/base.py b/tempest/api/object_storage/base.py
index 642c1ac..e0216fd 100644
--- a/tempest/api/object_storage/base.py
+++ b/tempest/api/object_storage/base.py
@@ -16,8 +16,8 @@
 import time
 
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import exceptions as lib_exc
 import tempest.test
diff --git a/tempest/api/object_storage/test_account_quotas.py b/tempest/api/object_storage/test_account_quotas.py
index cbf0d4b..84e4508 100644
--- a/tempest/api/object_storage/test_account_quotas.py
+++ b/tempest/api/object_storage/test_account_quotas.py
@@ -13,8 +13,8 @@
 # under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_account_services.py b/tempest/api/object_storage/test_account_services.py
index cf7dbe8..de64dfe 100644
--- a/tempest/api/object_storage/test_account_services.py
+++ b/tempest/api/object_storage/test_account_services.py
@@ -20,8 +20,8 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_container_acl.py b/tempest/api/object_storage/test_container_acl.py
index aa4e92c..d4e5ec5 100644
--- a/tempest/api/object_storage/test_container_acl.py
+++ b/tempest/api/object_storage/test_container_acl.py
@@ -14,8 +14,8 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/object_storage/test_container_acl_negative.py b/tempest/api/object_storage/test_container_acl_negative.py
index d5d5ea7..c0f7b3a 100644
--- a/tempest/api/object_storage/test_container_acl_negative.py
+++ b/tempest/api/object_storage/test_container_acl_negative.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_quotas.py b/tempest/api/object_storage/test_container_quotas.py
index d3b456a..7ff337e 100644
--- a/tempest/api/object_storage/test_container_quotas.py
+++ b/tempest/api/object_storage/test_container_quotas.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_services.py b/tempest/api/object_storage/test_container_services.py
index 2e617f3..a82d2cc 100644
--- a/tempest/api/object_storage/test_container_services.py
+++ b/tempest/api/object_storage/test_container_services.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_container_services_negative.py b/tempest/api/object_storage/test_container_services_negative.py
index ebbb84e..be066ba 100644
--- a/tempest/api/object_storage/test_container_services_negative.py
+++ b/tempest/api/object_storage/test_container_services_negative.py
@@ -16,8 +16,8 @@
 import testtools
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_staticweb.py b/tempest/api/object_storage/test_container_staticweb.py
index a280248..9e01c26 100644
--- a/tempest/api/object_storage/test_container_staticweb.py
+++ b/tempest/api/object_storage/test_container_staticweb.py
@@ -14,7 +14,7 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_sync.py b/tempest/api/object_storage/test_container_sync.py
index 63fb93d..1c45a98 100644
--- a/tempest/api/object_storage/test_container_sync.py
+++ b/tempest/api/object_storage/test_container_sync.py
@@ -18,10 +18,9 @@
 from six.moves.urllib import parse as urlparse
 import testtools
 
-
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_formpost.py b/tempest/api/object_storage/test_object_formpost.py
index 2829ac7..c100629 100644
--- a/tempest/api/object_storage/test_object_formpost.py
+++ b/tempest/api/object_storage/test_object_formpost.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_formpost_negative.py b/tempest/api/object_storage/test_object_formpost_negative.py
index 52b3978..c4e6a3a 100644
--- a/tempest/api/object_storage/test_object_formpost_negative.py
+++ b/tempest/api/object_storage/test_object_formpost_negative.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_object_services.py b/tempest/api/object_storage/test_object_services.py
index 58fd822..d463827 100644
--- a/tempest/api/object_storage/test_object_services.py
+++ b/tempest/api/object_storage/test_object_services.py
@@ -21,8 +21,8 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_slo.py b/tempest/api/object_storage/test_object_slo.py
index 8ed9bf8..085ad13 100644
--- a/tempest/api/object_storage/test_object_slo.py
+++ b/tempest/api/object_storage/test_object_slo.py
@@ -18,7 +18,7 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 from tempest import test
diff --git a/tempest/api/object_storage/test_object_temp_url.py b/tempest/api/object_storage/test_object_temp_url.py
index 5e3c9f7..912deab 100644
--- a/tempest/api/object_storage/test_object_temp_url.py
+++ b/tempest/api/object_storage/test_object_temp_url.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_temp_url_negative.py b/tempest/api/object_storage/test_object_temp_url_negative.py
index d0e0935..9c1393f 100644
--- a/tempest/api/object_storage/test_object_temp_url_negative.py
+++ b/tempest/api/object_storage/test_object_temp_url_negative.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_object_version.py b/tempest/api/object_storage/test_object_version.py
index 1b12dac..dc0d179 100644
--- a/tempest/api/object_storage/test_object_version.py
+++ b/tempest/api/object_storage/test_object_version.py
@@ -16,8 +16,8 @@
 import testtools
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/orchestration/base.py b/tempest/api/orchestration/base.py
index 3701b55..4e17c3d 100644
--- a/tempest/api/orchestration/base.py
+++ b/tempest/api/orchestration/base.py
@@ -14,8 +14,8 @@
 
 import yaml
 
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 import tempest.test
 
diff --git a/tempest/api/orchestration/stacks/test_environment.py b/tempest/api/orchestration/stacks/test_environment.py
index 0a9b3e5..c8a9aa7 100644
--- a/tempest/api/orchestration/stacks/test_environment.py
+++ b/tempest/api/orchestration/stacks/test_environment.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/orchestration/stacks/test_limits.py b/tempest/api/orchestration/stacks/test_limits.py
index b079435..9c9d4f9 100644
--- a/tempest/api/orchestration/stacks/test_limits.py
+++ b/tempest/api/orchestration/stacks/test_limits.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 
diff --git a/tempest/api/orchestration/stacks/test_neutron_resources.py b/tempest/api/orchestration/stacks/test_neutron_resources.py
index 0154658..6faca71 100644
--- a/tempest/api/orchestration/stacks/test_neutron_resources.py
+++ b/tempest/api/orchestration/stacks/test_neutron_resources.py
@@ -14,8 +14,8 @@
 from oslo_log import log as logging
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions
 from tempest import test
diff --git a/tempest/api/orchestration/stacks/test_non_empty_stack.py b/tempest/api/orchestration/stacks/test_non_empty_stack.py
index f106349..6b9c88b 100644
--- a/tempest/api/orchestration/stacks/test_non_empty_stack.py
+++ b/tempest/api/orchestration/stacks/test_non_empty_stack.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/orchestration/stacks/test_nova_keypair_resources.py b/tempest/api/orchestration/stacks/test_nova_keypair_resources.py
index 4d1db6d..a51648f 100644
--- a/tempest/api/orchestration/stacks/test_nova_keypair_resources.py
+++ b/tempest/api/orchestration/stacks/test_nova_keypair_resources.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/orchestration/stacks/test_soft_conf.py b/tempest/api/orchestration/stacks/test_soft_conf.py
index 89b10cc..dae0bab 100644
--- a/tempest/api/orchestration/stacks/test_soft_conf.py
+++ b/tempest/api/orchestration/stacks/test_soft_conf.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/orchestration/stacks/test_stacks.py b/tempest/api/orchestration/stacks/test_stacks.py
index 7b5f161..0be135b 100644
--- a/tempest/api/orchestration/stacks/test_stacks.py
+++ b/tempest/api/orchestration/stacks/test_stacks.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/orchestration/stacks/test_swift_resources.py b/tempest/api/orchestration/stacks/test_swift_resources.py
index 505abe7..97fdac4 100644
--- a/tempest/api/orchestration/stacks/test_swift_resources.py
+++ b/tempest/api/orchestration/stacks/test_swift_resources.py
@@ -13,8 +13,8 @@
 # under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/orchestration/stacks/test_templates.py b/tempest/api/orchestration/stacks/test_templates.py
index 21548a0..4ff951d 100644
--- a/tempest/api/orchestration/stacks/test_templates.py
+++ b/tempest/api/orchestration/stacks/test_templates.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/orchestration/stacks/test_volumes.py b/tempest/api/orchestration/stacks/test_volumes.py
index d34eb89..86323e1 100644
--- a/tempest/api/orchestration/stacks/test_volumes.py
+++ b/tempest/api/orchestration/stacks/test_volumes.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/admin/test_multi_backend.py b/tempest/api/volume/admin/test_multi_backend.py
index c3e904a..4a46adc 100644
--- a/tempest/api/volume/admin/test_multi_backend.py
+++ b/tempest/api/volume/admin/test_multi_backend.py
@@ -12,9 +12,9 @@
 
 import six
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/admin/test_qos.py b/tempest/api/volume/admin/test_qos.py
index e1cfb30..7a91985 100644
--- a/tempest/api/volume/admin/test_qos.py
+++ b/tempest/api/volume/admin/test_qos.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils as utils
 from tempest.common import waiters
+from tempest.lib.common.utils import data_utils as utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/volume/admin/test_volume_quotas.py b/tempest/api/volume/admin/test_volume_quotas.py
index 83fca45..3fd9b01 100644
--- a/tempest/api/volume/admin/test_volume_quotas.py
+++ b/tempest/api/volume/admin/test_volume_quotas.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 QUOTA_KEYS = ['gigabytes', 'snapshots', 'volumes', 'backups']
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 5d08416..6e56be9 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
index 5f590bc..d491f23 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/admin/test_volumes_backup.py b/tempest/api/volume/admin/test_volumes_backup.py
index 13b7384..b771d8a 100644
--- a/tempest/api/volume/admin/test_volumes_backup.py
+++ b/tempest/api/volume/admin/test_volumes_backup.py
@@ -17,9 +17,9 @@
 from oslo_serialization import jsonutils as json
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/admin/v3/test_user_messages.py b/tempest/api/volume/admin/v3/test_user_messages.py
index ed85d4d..991397a 100755
--- a/tempest/api/volume/admin/v3/test_user_messages.py
+++ b/tempest/api/volume/admin/v3/test_user_messages.py
@@ -14,8 +14,8 @@
 #    under the License.
 
 from tempest.api.volume.v3 import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/base.py b/tempest/api/volume/base.py
index fd10fb3..496594c 100644
--- a/tempest/api/volume/base.py
+++ b/tempest/api/volume/base.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 from tempest.common import compute
-from tempest.common.utils import data_utils
 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 exceptions
 import tempest.test
diff --git a/tempest/api/volume/test_volumes_actions.py b/tempest/api/volume/test_volumes_actions.py
index 0a6901c..d39b07a 100644
--- a/tempest/api/volume/test_volumes_actions.py
+++ b/tempest/api/volume/test_volumes_actions.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 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
 from tempest.lib import exceptions
diff --git a/tempest/api/volume/test_volumes_backup.py b/tempest/api/volume/test_volumes_backup.py
index e24a142..83006c0 100644
--- a/tempest/api/volume/test_volumes_backup.py
+++ b/tempest/api/volume/test_volumes_backup.py
@@ -16,9 +16,9 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_get.py b/tempest/api/volume/test_volumes_get.py
index a3e46a8..d870534 100644
--- a/tempest/api/volume/test_volumes_get.py
+++ b/tempest/api/volume/test_volumes_get.py
@@ -17,9 +17,9 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_list.py b/tempest/api/volume/test_volumes_list.py
index d1da95d..1d6d35f 100644
--- a/tempest/api/volume/test_volumes_list.py
+++ b/tempest/api/volume/test_volumes_list.py
@@ -18,7 +18,7 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index 28e65ed..76ffc03 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/test_volumes_snapshots.py b/tempest/api/volume/test_volumes_snapshots.py
index 5abda5e..82b4fc2 100644
--- a/tempest/api/volume/test_volumes_snapshots.py
+++ b/tempest/api/volume/test_volumes_snapshots.py
@@ -13,8 +13,8 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_snapshots_negative.py b/tempest/api/volume/test_volumes_snapshots_negative.py
index 9e44379..d3e3c9b 100644
--- a/tempest/api/volume/test_volumes_snapshots_negative.py
+++ b/tempest/api/volume/test_volumes_snapshots_negative.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/v2/test_volumes_snapshots_negative.py b/tempest/api/volume/v2/test_volumes_snapshots_negative.py
index e5581b9..4608b07 100644
--- a/tempest/api/volume/v2/test_volumes_snapshots_negative.py
+++ b/tempest/api/volume/v2/test_volumes_snapshots_negative.py
@@ -14,8 +14,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/common/utils/linux/remote_client.py b/tempest/common/utils/linux/remote_client.py
index b7c776b..6dfc579 100644
--- a/tempest/common/utils/linux/remote_client.py
+++ b/tempest/common/utils/linux/remote_client.py
@@ -11,17 +11,12 @@
 #    under the License.
 
 import re
-import sys
 import time
 
-import netaddr
-import six
-
 from oslo_log import log as logging
 
 from tempest import config
-from tempest.lib.common import ssh
-from tempest.lib.common.utils import test_utils
+from tempest.lib.common.utils.linux import remote_client
 import tempest.lib.exceptions
 
 CONF = config.CONF
@@ -29,39 +24,11 @@
 LOG = logging.getLogger(__name__)
 
 
-def debug_ssh(function):
-    """Decorator to generate extra debug info in case off SSH failure"""
-    def wrapper(self, *args, **kwargs):
-        try:
-            return function(self, *args, **kwargs)
-        except tempest.lib.exceptions.SSHTimeout:
-            try:
-                original_exception = sys.exc_info()
-                caller = test_utils.find_test_caller() or "not found"
-                if self.server:
-                    msg = 'Caller: %s. Timeout trying to ssh to server %s'
-                    LOG.debug(msg, caller, self.server)
-                    if self.log_console and self.servers_client:
-                        try:
-                            msg = 'Console log for server %s: %s'
-                            console_log = (
-                                self.servers_client.get_console_output(
-                                    self.server['id'])['output'])
-                            LOG.debug(msg, self.server['id'], console_log)
-                        except Exception:
-                            msg = 'Could not get console_log for server %s'
-                            LOG.debug(msg, self.server['id'])
-                # re-raise the original ssh timeout exception
-                six.reraise(*original_exception)
-            finally:
-                # Delete the traceback to avoid circular references
-                _, _, trace = original_exception
-                del trace
-    return wrapper
+class RemoteClient(remote_client.RemoteClient):
 
-
-class RemoteClient(object):
-
+    # TODO(oomichi): Make this class deprecated after migrating
+    #                necessary methods to tempest.lib and cleaning
+    #                unnecessary methods up from this class.
     def __init__(self, ip_address, username, password=None, pkey=None,
                  server=None, servers_client=None):
         """Executes commands in a VM over ssh
@@ -73,35 +40,15 @@
         :param server: server dict, used for debugging purposes
         :param servers_client: servers client, used for debugging purposes
         """
-        self.server = server
-        self.servers_client = servers_client
-
-        ssh_timeout = CONF.validation.ssh_timeout
-        connect_timeout = CONF.validation.connect_timeout
-        self.log_console = CONF.compute_feature_enabled.console_output
-        self.ssh_shell_prologue = CONF.validation.ssh_shell_prologue
-        self.ping_count = CONF.validation.ping_count
-        self.ping_size = CONF.validation.ping_size
-
-        self.ssh_client = ssh.Client(ip_address, username, password,
-                                     ssh_timeout, pkey=pkey,
-                                     channel_timeout=connect_timeout)
-
-    @debug_ssh
-    def exec_command(self, cmd):
-        # Shell options below add more clearness on failures,
-        # path is extended for some non-cirros guest oses (centos7)
-        cmd = self.ssh_shell_prologue + " " + cmd
-        LOG.debug("Remote command: %s", cmd)
-        return self.ssh_client.exec_command(cmd)
-
-    @debug_ssh
-    def validate_authentication(self):
-        """Validate ssh connection and authentication
-
-           This method raises an Exception when the validation fails.
-        """
-        self.ssh_client.test_connection_auth()
+        super(RemoteClient, self).__init__(
+            ip_address, username, password=password, pkey=pkey,
+            server=server, servers_client=servers_client,
+            ssh_timeout=CONF.validation.ssh_timeout,
+            connect_timeout=CONF.validation.connect_timeout,
+            console_output_enabled=CONF.compute_feature_enabled.console_output,
+            ssh_shell_prologue=CONF.validation.ssh_shell_prologue,
+            ping_count=CONF.validation.ping_count,
+            ping_size=CONF.validation.ping_size)
 
     def get_disks(self):
         # Select root disk devices as shown by lsblk
@@ -132,19 +79,6 @@
         cmd = 'sudo sh -c "echo \\"%s\\" >/dev/console"' % message
         return self.exec_command(cmd)
 
-    def ping_host(self, host, count=None, size=None, nic=None):
-        if count is None:
-            count = self.ping_count
-        if size is None:
-            size = self.ping_size
-
-        addr = netaddr.IPAddress(host)
-        cmd = 'ping6' if addr.version == 6 else 'ping'
-        if nic:
-            cmd = 'sudo {cmd} -I {nic}'.format(cmd=cmd, nic=nic)
-        cmd += ' -c{0} -w{0} -s{1} {2}'.format(count, size, host)
-        return self.exec_command(cmd)
-
     def set_mac_address(self, nic, address):
         self.set_nic_state(nic=nic, state="down")
         cmd = "sudo ip link set dev {0} address {1}".format(nic, address)
diff --git a/tempest/common/validation_resources.py b/tempest/common/validation_resources.py
index 88697c4..b15796f 100644
--- a/tempest/common/validation_resources.py
+++ b/tempest/common/validation_resources.py
@@ -15,7 +15,7 @@
 
 from tempest import config
 
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import exceptions as lib_exc
 
 CONF = config.CONF
diff --git a/tempest/config.py b/tempest/config.py
index b79f502..3ad7684 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -984,9 +984,6 @@
     cfg.BoolOpt('heat',
                 default=False,
                 help="Whether or not Heat is expected to be available"),
-    cfg.BoolOpt('sahara',
-                default=False,
-                help="Whether or not Sahara is expected to be available"),
 ]
 
 debug_group = cfg.OptGroup(name="debug",
@@ -1188,6 +1185,12 @@
             # loaded, options registered, and _config is set.
             _register_tempest_service_clients()
 
+            # Registering service clients and pushing their configuration to
+            # the service clients register. Doing this in the config module
+            # ensures that the configuration is available by the time we
+            # discover tests from plugins.
+            plugins.TempestTestPluginManager()._register_service_clients()
+
         return getattr(self._config, attr)
 
     def set_config_path(self, path):
diff --git a/tempest/lib/common/rest_client.py b/tempest/lib/common/rest_client.py
index 3246d6a..99ba6ab 100644
--- a/tempest/lib/common/rest_client.py
+++ b/tempest/lib/common/rest_client.py
@@ -732,12 +732,21 @@
         if resp.status < 400:
             return
 
-        JSON_ENC = ['application/json', 'application/json; charset=utf-8']
+        # NOTE(zhipengh): There is a purposefully duplicate of content-type
+        # with the only difference is with or without spaces, as specified
+        # in RFC7231.
+        JSON_ENC = ['application/json', 'application/json; charset=utf-8',
+                    'application/json;charset=utf-8']
+
         # NOTE(mtreinish): This is for compatibility with Glance and swift
         # APIs. These are the return content types that Glance api v1
         # (and occasionally swift) are using.
+        # NOTE(zhipengh): There is a purposefully duplicate of content-type
+        # with the only difference is with or without spaces, as specified
+        # in RFC7231.
         TXT_ENC = ['text/plain', 'text/html', 'text/html; charset=utf-8',
-                   'text/plain; charset=utf-8']
+                   'text/plain; charset=utf-8', 'text/html;charset=utf-8',
+                   'text/plain;charset=utf-8']
 
         if ctype.lower() in JSON_ENC:
             parse_resp = True
diff --git a/tempest/lib/common/utils/linux/__init__.py b/tempest/lib/common/utils/linux/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/lib/common/utils/linux/__init__.py
diff --git a/tempest/lib/common/utils/linux/remote_client.py b/tempest/lib/common/utils/linux/remote_client.py
new file mode 100644
index 0000000..64d6be2
--- /dev/null
+++ b/tempest/lib/common/utils/linux/remote_client.py
@@ -0,0 +1,117 @@
+#    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.
+
+import sys
+
+import netaddr
+from oslo_log import log as logging
+import six
+
+from tempest.lib.common import ssh
+from tempest.lib.common.utils import test_utils
+import tempest.lib.exceptions
+
+LOG = logging.getLogger(__name__)
+
+
+def debug_ssh(function):
+    """Decorator to generate extra debug info in case off SSH failure"""
+    def wrapper(self, *args, **kwargs):
+        try:
+            return function(self, *args, **kwargs)
+        except tempest.lib.exceptions.SSHTimeout:
+            try:
+                original_exception = sys.exc_info()
+                caller = test_utils.find_test_caller() or "not found"
+                if self.server:
+                    msg = 'Caller: %s. Timeout trying to ssh to server %s'
+                    LOG.debug(msg, caller, self.server)
+                    if self.console_output_enabled and self.servers_client:
+                        try:
+                            msg = 'Console log for server %s: %s'
+                            console_log = (
+                                self.servers_client.get_console_output(
+                                    self.server['id'])['output'])
+                            LOG.debug(msg, self.server['id'], console_log)
+                        except Exception:
+                            msg = 'Could not get console_log for server %s'
+                            LOG.debug(msg, self.server['id'])
+                # re-raise the original ssh timeout exception
+                six.reraise(*original_exception)
+            finally:
+                # Delete the traceback to avoid circular references
+                _, _, trace = original_exception
+                del trace
+    return wrapper
+
+
+class RemoteClient(object):
+
+    def __init__(self, ip_address, username, password=None, pkey=None,
+                 server=None, servers_client=None, ssh_timeout=300,
+                 connect_timeout=60, console_output_enabled=True,
+                 ssh_shell_prologue="set -eu -o pipefail; PATH=$$PATH:/sbin;",
+                 ping_count=1, ping_size=56):
+        """Executes commands in a VM over ssh
+
+        :param ip_address: IP address to ssh to
+        :param username: Ssh username
+        :param password: Ssh password
+        :param pkey: Ssh public key
+        :param server: Server dict, used for debugging purposes
+        :param servers_client: Servers client, used for debugging purposes
+        :param ssh_timeout: Timeout in seconds to wait for the ssh banner
+        :param connect_timeout: Timeout in seconds to wait for TCP connection
+        :param console_output_enabled: Support serial console output?
+        :param ssh_shell_prologue: Shell fragments to use before command
+        :param ping_count: Number of ping packets
+        :param ping_size: Packet size for ping packets
+        """
+        self.server = server
+        self.servers_client = servers_client
+        self.console_output_enabled = console_output_enabled
+        self.ssh_shell_prologue = ssh_shell_prologue
+        self.ping_count = ping_count
+        self.ping_size = ping_size
+
+        self.ssh_client = ssh.Client(ip_address, username, password,
+                                     ssh_timeout, pkey=pkey,
+                                     channel_timeout=connect_timeout)
+
+    @debug_ssh
+    def exec_command(self, cmd):
+        # Shell options below add more clearness on failures,
+        # path is extended for some non-cirros guest oses (centos7)
+        cmd = self.ssh_shell_prologue + " " + cmd
+        LOG.debug("Remote command: %s", cmd)
+        return self.ssh_client.exec_command(cmd)
+
+    @debug_ssh
+    def validate_authentication(self):
+        """Validate ssh connection and authentication
+
+           This method raises an Exception when the validation fails.
+        """
+        self.ssh_client.test_connection_auth()
+
+    def ping_host(self, host, count=None, size=None, nic=None):
+        if count is None:
+            count = self.ping_count
+        if size is None:
+            size = self.ping_size
+
+        addr = netaddr.IPAddress(host)
+        cmd = 'ping6' if addr.version == 6 else 'ping'
+        if nic:
+            cmd = 'sudo {cmd} -I {nic}'.format(cmd=cmd, nic=nic)
+        cmd += ' -c{0} -w{0} -s{1} {2}'.format(count, size, host)
+        return self.exec_command(cmd)
diff --git a/tempest/lib/services/volume/v2/capabilities_client.py b/tempest/lib/services/volume/v2/capabilities_client.py
index b6de5b9..40cb8bf 100644
--- a/tempest/lib/services/volume/v2/capabilities_client.py
+++ b/tempest/lib/services/volume/v2/capabilities_client.py
@@ -19,6 +19,7 @@
 
 
 class CapabilitiesClient(rest_client.RestClient):
+    api_version = "v2"
 
     def show_backend_capabilities(self, host):
         """Shows capabilities for a storage back end.
diff --git a/tempest/lib/services/volume/v2/scheduler_stats_client.py b/tempest/lib/services/volume/v2/scheduler_stats_client.py
index 637254b..3f56f82 100644
--- a/tempest/lib/services/volume/v2/scheduler_stats_client.py
+++ b/tempest/lib/services/volume/v2/scheduler_stats_client.py
@@ -19,6 +19,7 @@
 
 
 class SchedulerStatsClient(rest_client.RestClient):
+    api_version = "v2"
 
     def list_pools(self, detail=False):
         """List all the volumes pools (hosts).
diff --git a/tempest/test_discover/plugins.py b/tempest/test_discover/plugins.py
index abe2b73..9ddcd9b 100644
--- a/tempest/test_discover/plugins.py
+++ b/tempest/test_discover/plugins.py
@@ -124,7 +124,6 @@
             'tempest.test_plugins', invoke_on_load=True,
             propagate_map_exceptions=True,
             on_load_failure_callback=self.failure_hook)
-        self._register_service_clients()
 
     @staticmethod
     def failure_hook(_, ep, err):
diff --git a/tempest/tests/common/utils/linux/test_remote_client.py b/tempest/tests/common/utils/linux/test_remote_client.py
index 7199206..48cb86b 100644
--- a/tempest/tests/common/utils/linux/test_remote_client.py
+++ b/tempest/tests/common/utils/linux/test_remote_client.py
@@ -182,7 +182,7 @@
                                            user='user',
                                            password='pass')))
         self.log = self.useFixture(fixtures.FakeLogger(
-            name='tempest.common.utils.linux.remote_client',
+            name='tempest.lib.common.utils.linux.remote_client',
             level='DEBUG'))
 
     def test_validate_debug_ssh_console(self):
diff --git a/tempest/tests/lib/common/utils/linux/__init__.py b/tempest/tests/lib/common/utils/linux/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/tests/lib/common/utils/linux/__init__.py
diff --git a/tempest/tests/lib/common/utils/linux/test_remote_client.py b/tempest/tests/lib/common/utils/linux/test_remote_client.py
new file mode 100644
index 0000000..cf312f4
--- /dev/null
+++ b/tempest/tests/lib/common/utils/linux/test_remote_client.py
@@ -0,0 +1,67 @@
+# Copyright 2017 NEC Corporation.
+# All Rights Reserved.
+#
+#    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.
+
+import mock
+
+from tempest.lib.common import ssh
+from tempest.lib.common.utils.linux import remote_client
+from tempest.lib import exceptions as lib_exc
+from tempest.tests import base
+
+
+class FakeServersClient(object):
+
+    def get_console_output(self, server_id):
+        return {"output": "fake_output"}
+
+
+class TestRemoteClient(base.TestCase):
+
+    @mock.patch.object(ssh.Client, 'exec_command', return_value='success')
+    def test_exec_command(self, mock_ssh_exec_command):
+        client = remote_client.RemoteClient('192.168.1.10', 'username')
+        client.exec_command('ls')
+        mock_ssh_exec_command.assert_called_once_with(
+            'set -eu -o pipefail; PATH=$$PATH:/sbin; ls')
+
+    @mock.patch.object(ssh.Client, 'test_connection_auth')
+    def test_validate_authentication(self, mock_test_connection_auth):
+        client = remote_client.RemoteClient('192.168.1.10', 'username')
+        client.validate_authentication()
+        mock_test_connection_auth.assert_called_once_with()
+
+    @mock.patch.object(remote_client.LOG, 'debug')
+    @mock.patch.object(ssh.Client, 'exec_command')
+    def test_debug_ssh_without_console(self, mock_exec_command, mock_debug):
+        mock_exec_command.side_effect = lib_exc.SSHTimeout
+        server = {'id': 'fake_id'}
+        client = remote_client.RemoteClient('192.168.1.10', 'username',
+                                            server=server)
+        self.assertRaises(lib_exc.SSHTimeout, client.exec_command, 'ls')
+        mock_debug.assert_called_with(
+            'Caller: %s. Timeout trying to ssh to server %s',
+            'TestRemoteClient:test_debug_ssh_without_console', server)
+
+    @mock.patch.object(remote_client.LOG, 'debug')
+    @mock.patch.object(ssh.Client, 'exec_command')
+    def test_debug_ssh_with_console(self, mock_exec_command, mock_debug):
+        mock_exec_command.side_effect = lib_exc.SSHTimeout
+        server = {'id': 'fake_id'}
+        client = remote_client.RemoteClient('192.168.1.10', 'username',
+                                            server=server,
+                                            servers_client=FakeServersClient())
+        self.assertRaises(lib_exc.SSHTimeout, client.exec_command, 'ls')
+        mock_debug.assert_called_with(
+            'Console log for server %s: %s', server['id'], 'fake_output')