diff --git a/cinder/tests/unit/test_vmware_vmdk.py b/cinder/tests/unit/test_vmware_vmdk.py
index cf76beb2ad8..761525a3467 100644
--- a/cinder/tests/unit/test_vmware_vmdk.py
+++ b/cinder/tests/unit/test_vmware_vmdk.py
@@ -147,6 +147,7 @@ class VMwareEsxVmdkDriverTestCase(test.TestCase):
     IMG_TX_TIMEOUT = 10
     MAX_OBJECTS = 100
     TMP_DIR = "/vmware-tmp"
+    CA_FILE = "/etc/ssl/rui-ca-cert.pem"
     VMDK_DRIVER = vmdk.VMwareEsxVmdkDriver
 
     def setUp(self):
@@ -163,6 +164,7 @@ class VMwareEsxVmdkDriverTestCase(test.TestCase):
         self._config.vmware_image_transfer_timeout_secs = self.IMG_TX_TIMEOUT
         self._config.vmware_max_objects_retrieval = self.MAX_OBJECTS
         self._config.vmware_tmp_dir = self.TMP_DIR
+        self._config.vmware_ca_file = self.CA_FILE
         self._db = mock.Mock()
         self._driver = vmdk.VMwareEsxVmdkDriver(configuration=self._config,
                                                 db=self._db)
@@ -2835,6 +2837,22 @@ class VMwareVcVmdkDriverTestCase(VMwareEsxVmdkDriverTestCase):
         vops.move_backing_to_folder.assert_called_once_with(backing,
                                                             folder)
 
+    @mock.patch('oslo_vmware.api.VMwareAPISession')
+    def test_session(self, apiSession):
+        self._session = None
+
+        self._driver.session()
+
+        apiSession.assert_called_once_with(
+            self._config.vmware_host_ip,
+            self._config.vmware_host_username,
+            self._config.vmware_host_password,
+            self._config.vmware_api_retry_count,
+            self._config.vmware_task_poll_interval,
+            wsdl_loc=self._config.safe_get('vmware_wsdl_location'),
+            pbm_wsdl_loc=None,
+            cacert=self._config.vmware_ca_file)
+
 
 class ImageDiskTypeTest(test.TestCase):
     """Unit tests for ImageDiskType."""
diff --git a/cinder/volume/drivers/vmware/vmdk.py b/cinder/volume/drivers/vmware/vmdk.py
index 9f318e33190..af7600dab85 100644
--- a/cinder/volume/drivers/vmware/vmdk.py
+++ b/cinder/volume/drivers/vmware/vmdk.py
@@ -106,7 +106,10 @@ vmdk_opts = [
     cfg.StrOpt('vmware_tmp_dir',
                default='/tmp',
                help='Directory where virtual disks are stored during volume '
-                    'backup and restore.')
+                    'backup and restore.'),
+    cfg.StrOpt('vmware_ca_file',
+               default=None,
+               help='CA bundle file to verify vCenter server certificate.')
 ]
 
 CONF = cfg.CONF
@@ -1884,11 +1887,13 @@ class VMwareVcVmdkDriver(VMwareEsxVmdkDriver):
             task_poll_interval = self.configuration.vmware_task_poll_interval
             wsdl_loc = self.configuration.safe_get('vmware_wsdl_location')
             pbm_wsdl = self.pbm_wsdl if hasattr(self, 'pbm_wsdl') else None
+            ca_file = self.configuration.vmware_ca_file
             self._session = api.VMwareAPISession(ip, username,
                                                  password, api_retry_count,
                                                  task_poll_interval,
                                                  wsdl_loc=wsdl_loc,
-                                                 pbm_wsdl_loc=pbm_wsdl)
+                                                 pbm_wsdl_loc=pbm_wsdl,
+                                                 cacert=ca_file)
         return self._session
 
     def _get_vc_version(self):