diff --git a/tacker/common/rpc_compat.py b/tacker/common/rpc_compat.py
index 58f2a9389..92518d314 100644
--- a/tacker/common/rpc_compat.py
+++ b/tacker/common/rpc_compat.py
@@ -107,7 +107,7 @@ class Service(service.Service):
         super(Service, self).start()
 
         self.conn = create_connection(new=True)
-        LOG.debug("Creating Consumer connection for Service %s" %
+        LOG.debug("Creating Consumer connection for Service %s",
                   self.topic)
 
         endpoints = [self.manager]
diff --git a/tacker/openstack/common/fileutils.py b/tacker/openstack/common/fileutils.py
index 5e1c98267..46f3a8a14 100644
--- a/tacker/openstack/common/fileutils.py
+++ b/tacker/openstack/common/fileutils.py
@@ -60,7 +60,7 @@ def read_cached_file(filename, force_reload=False):
     cache_info = _FILE_CACHE.setdefault(filename, {})
 
     if not cache_info or mtime > cache_info.get('mtime', 0):
-        LOG.debug(_("Reloading cached file %s") % filename)
+        LOG.debug(_("Reloading cached file %s"), filename)
         with open(filename) as fap:
             cache_info['data'] = fap.read()
         cache_info['mtime'] = mtime
diff --git a/tacker/openstack/common/loopingcall.py b/tacker/openstack/common/loopingcall.py
index f226d0419..c644503f4 100644
--- a/tacker/openstack/common/loopingcall.py
+++ b/tacker/openstack/common/loopingcall.py
@@ -80,7 +80,7 @@ class FixedIntervalLoopingCall(LoopingCallBase):
                     delay = interval - timeutils.delta_seconds(start, end)
                     if delay <= 0:
                         LOG.warning(_('task run outlasted interval by %s '
-                                      'sec') % -delay)
+                                      'sec'), -delay)
                     greenthread.sleep(delay if delay > 0 else 0)
             except LoopingCallDone as e:
                 self.stop()
diff --git a/tacker/openstack/common/middleware/notifier.py b/tacker/openstack/common/middleware/notifier.py
index 7c0d9cf0b..44201b4f9 100644
--- a/tacker/openstack/common/middleware/notifier.py
+++ b/tacker/openstack/common/middleware/notifier.py
@@ -38,7 +38,7 @@ def log_and_ignore_error(fn):
             return fn(*args, **kwargs)
         except Exception as e:
             LOG.exception(_LE('An exception occurred processing '
-                              'the API call: %s ') % e)
+                              'the API call: %s '), e)
     return wrapped
 
 
diff --git a/tacker/openstack/common/policy.py b/tacker/openstack/common/policy.py
index b778ef5e1..ba458a7c1 100644
--- a/tacker/openstack/common/policy.py
+++ b/tacker/openstack/common/policy.py
@@ -391,7 +391,7 @@ def _parse_check(rule):
     try:
         kind, match = rule.split(':', 1)
     except Exception:
-        LOG.exception(_("Failed to understand rule %(rule)s") % locals())
+        LOG.exception(_("Failed to understand rule %(rule)s"), locals())
         # If the rule is invalid, we'll fail closed
         return FalseCheck()
 
@@ -401,7 +401,7 @@ def _parse_check(rule):
     elif None in _checks:
         return _checks[None](kind, match)
     else:
-        LOG.error(_("No handler for matches of kind %s") % kind)
+        LOG.error(_("No handler for matches of kind %s"), kind)
         return FalseCheck()
 
 
@@ -676,7 +676,7 @@ def _parse_text_rule(rule):
         return state.result
     except ValueError:
         # Couldn't parse the rule
-        LOG.exception(_("Failed to understand rule %(rule)r") % locals())
+        LOG.exception(_("Failed to understand rule %(rule)r"), locals())
 
         # Fail closed
         return FalseCheck()
diff --git a/tacker/openstack/common/processutils.py b/tacker/openstack/common/processutils.py
index b7e5411c6..8ea97ad6f 100644
--- a/tacker/openstack/common/processutils.py
+++ b/tacker/openstack/common/processutils.py
@@ -238,7 +238,7 @@ def ssh_execute(ssh, cmd, process_input=None,
 
     # exit_status == -1 if no exit code was returned
     if exit_status != -1:
-        LOG.debug(_('Result was %s') % exit_status)
+        LOG.debug(_('Result was %s'), exit_status)
         if check_exit_code and exit_status != 0:
             raise ProcessExecutionError(exit_code=exit_status,
                                         stdout=stdout,
diff --git a/tacker/vm/tosca/utils.py b/tacker/vm/tosca/utils.py
index f12f237da..c8ffc4f24 100644
--- a/tacker/vm/tosca/utils.py
+++ b/tacker/vm/tosca/utils.py
@@ -95,7 +95,7 @@ def updateimports(template):
 
         template['imports'].append(nfvfile)
 
-    LOG.debug(_("%s") % path)
+    LOG.debug(_("%s"), path)
 
 
 @log.log
@@ -131,7 +131,7 @@ def get_mgmt_ports(tosca):
                 if vdu is not None:
                     name = 'mgmt_ip-%s' % vdu
                     mgmt_ports[name] = nt.name
-    LOG.debug('mgmt_ports: %s' % mgmt_ports)
+    LOG.debug('mgmt_ports: %s', mgmt_ports)
     return mgmt_ports
 
 
@@ -185,7 +185,7 @@ def post_process_heat_template(heat_tpl, mgmt_ports, res_tpl,
             heat_dict['outputs'].update(output)
         else:
             heat_dict['outputs'] = output
-        LOG.debug(_('Added output for %s') % outputname)
+        LOG.debug(_('Added output for %s'), outputname)
     add_resources_tpl(heat_dict, res_tpl)
     if unsupported_res_prop:
         convert_unsupported_res_prop(heat_dict, unsupported_res_prop)