diff --git a/venus/cmd/api.py b/venus/cmd/api.py
index dcda7e9..c9763a4 100644
--- a/venus/cmd/api.py
+++ b/venus/cmd/api.py
@@ -45,8 +45,8 @@ def main():
 
     gmr.TextGuruMeditation.setup_autorun(version)
 
-    launcher = service.get_launcher()
     server = service.WSGIService('osapi_venus')
+    launcher = service.get_launcher()
     launcher.launch_service(server, workers=server.workers)
     launcher.wait()
 
diff --git a/venus/conf/api.py b/venus/conf/api.py
index cc2cf5a..ba8fc38 100644
--- a/venus/conf/api.py
+++ b/venus/conf/api.py
@@ -12,6 +12,29 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from oslo_config import cfg
+
+
+service_opts = [
+    cfg.IntOpt('periodic_interval',
+               default=60,
+               help='Interval, in seconds, between running periodic tasks'),
+    cfg.IntOpt('periodic_fuzzy_delay',
+               default=60,
+               help='Range, in seconds, to randomly delay when starting the'
+                    ' periodic task scheduler to reduce stampeding.'
+                    ' (Disable by setting to 0)'),
+    cfg.StrOpt('osapi_venus_listen',
+               default="0.0.0.0",
+               help='IP address on which OpenStack Venus API listens'),
+    cfg.IntOpt('osapi_venus_listen_port',
+               default=8560,
+               min=1, max=65535,
+               help='Port on which OpenStack Venus API listens'),
+    cfg.IntOpt('osapi_venus_workers',
+               help='Number of workers for OpenStack Venus API service. '
+                    'The default is equal to the number of CPUs available.'), ]
+
 
 def register_opts(conf):
-    pass
+    conf.register_opts(service_opts)
diff --git a/venus/service.py b/venus/service.py
index 7d0bdc9..bf5bd2c 100644
--- a/venus/service.py
+++ b/venus/service.py
@@ -20,7 +20,6 @@ import os
 import random
 
 from oslo_concurrency import processutils
-from oslo_config import cfg
 from oslo_log import log as logging
 from oslo_service import loopingcall
 from oslo_service import service
@@ -29,6 +28,7 @@ import osprofiler.notifier
 from osprofiler import profiler
 import osprofiler.web
 
+from venus.conf import CONF
 from venus import context
 from venus import exception
 from venus.i18n import _, _LI, _LW
@@ -36,32 +36,9 @@ from venus import version
 from venus.wsgi import common as wsgi_common
 from venus.wsgi import eventlet_server as wsgi
 
+
 LOG = logging.getLogger(__name__)
 
-service_opts = [
-    cfg.IntOpt('periodic_interval',
-               default=60,
-               help='Interval, in seconds, between running periodic tasks'),
-    cfg.IntOpt('periodic_fuzzy_delay',
-               default=60,
-               help='Range, in seconds, to randomly delay when starting the'
-                    ' periodic task scheduler to reduce stampeding.'
-                    ' (Disable by setting to 0)'),
-    cfg.StrOpt('osapi_venus_listen',
-               default="0.0.0.0",
-               help='IP address on which OpenStack Venus API listens'),
-    cfg.IntOpt('osapi_venus_listen_port',
-               default=8560,
-               min=1, max=65535,
-               help='Port on which OpenStack Venus API listens'),
-    cfg.IntOpt('osapi_venus_workers',
-               help='Number of workers for OpenStack Venus API service. '
-                    'The default is equal to the number of CPUs available.'), ]
-
-
-CONF = cfg.CONF
-CONF.register_opts(service_opts)
-
 
 def setup_profiler(binary, host):
     if CONF.profiler.profiler_enabled: