diff --git a/tripleo_common/image/base.py b/tripleo_common/image/base.py
index 0062cd648..c9656a7de 100644
--- a/tripleo_common/image/base.py
+++ b/tripleo_common/image/base.py
@@ -55,7 +55,7 @@ class BaseImageManager(object):
                     data = yaml.safe_load(cf.read()).get(section)
                     if not data:
                         return None
-                    self.logger.debug('%s JSON: %s' % (section, str(data)))
+                    self.logger.debug('%s JSON: %s', (section, str(data)))
                 for item in data:
                     image_name = item.get('imagename')
                     if image_name is None:
@@ -65,7 +65,7 @@ class BaseImageManager(object):
 
                     if self.images is not None and \
                             image_name not in self.images:
-                        self.logger.debug('Image %s ignored' % image_name)
+                        self.logger.debug('Image %s ignored', image_name)
                         continue
 
                     existing_image = config_data.get(image_name)
@@ -84,11 +84,11 @@ class BaseImageManager(object):
 
                     config_data[image_name] = existing_image
             else:
-                self.logger.error('No config file exists at: %s' % config_file)
+                self.logger.error('No config file exists at: %s', config_file)
                 raise IOError('No config file exists at: %s' % config_file)
         return [x for x in config_data.values()]
 
     def json_output(self):
-        self.logger.info('Using config files: %s' % self.config_files)
+        self.logger.info('Using config files: %s', self.config_files)
         disk_images = self.load_config_files(self.DISK_IMAGES)
         print(json.dumps(disk_images))
diff --git a/tripleo_common/image/build.py b/tripleo_common/image/build.py
index bd3b31b78..f24db23e5 100644
--- a/tripleo_common/image/build.py
+++ b/tripleo_common/image/build.py
@@ -44,7 +44,7 @@ class ImageBuildManager(BaseImageManager):
     def build(self):
         """Start the build process"""
 
-        self.logger.info('Using config files: %s' % self.config_files)
+        self.logger.info('Using config files: %s', self.config_files)
 
         disk_images = self.load_config_files(self.DISK_IMAGES)
 
@@ -59,13 +59,13 @@ class ImageBuildManager(BaseImageManager):
             node_dist = image.get('distro')
             if node_dist is None:
                 raise ImageSpecificationException('distro is required')
-            self.logger.info('imagename: %s' % image_name)
+            self.logger.info('imagename: %s', image_name)
             image_extension = image.get('imageext', image_type)
             image_path = os.path.join(self.output_directory, image_name)
             if self.skip:
-                self.logger.info('looking for image at path: %s' % image_path)
+                self.logger.info('looking for image at path: %s', image_path)
                 if os.path.exists('%s.%s' % (image_path, image_extension)):
-                    self.logger.info('Image file exists for image name: %s' %
+                    self.logger.info('Image file exists for image name: %s',
                                      image_name)
                     self.logger.info('Skipping image build')
                     continue
diff --git a/tripleo_common/image/image_builder.py b/tripleo_common/image/image_builder.py
index 9c4d8cd25..9c887ee1d 100644
--- a/tripleo_common/image/image_builder.py
+++ b/tripleo_common/image/image_builder.py
@@ -117,8 +117,8 @@ class DibImageBuilder(ImageBuilder):
 
         log_file = '%s.log' % image_path
 
-        self.logger.info('Running %s' % cmd)
-        self.logger.info('Logging output to %s' % log_file)
+        self.logger.info('Running %s', cmd)
+        self.logger.info('Logging output to %s', log_file)
         process = subprocess.Popen(cmd,
                                    stdout=subprocess.PIPE,
                                    stderr=subprocess.STDOUT)
diff --git a/tripleo_common/image/kolla_builder.py b/tripleo_common/image/kolla_builder.py
index 736d822b0..98de70440 100644
--- a/tripleo_common/image/kolla_builder.py
+++ b/tripleo_common/image/kolla_builder.py
@@ -549,7 +549,7 @@ class KollaImageBuilder(base.BaseImageManager):
             raise subprocess.CalledProcessError(process.returncode, cmd, err)
 
         if template_only:
-            self.logger.info('Running %s' % ' '.join(cmd_deps))
+            self.logger.info('Running %s', ' '.join(cmd_deps))
             env = os.environ.copy()
             process = subprocess.Popen(cmd_deps, env=env,
                                        stdout=subprocess.PIPE,