installing the digicert CIS plugin (#537)

lemur/common/managers.py

@@ -8,6 +8,8 @@
 """
 from flask import current_app
 
+from lemur.exceptions import InvalidConfiguration
+
 
 # inspired by https://github.com/getsentry/sentry
 class InstanceManager(object):
@@ -58,8 +60,10 @@ class InstanceManager(object):
                     results.append(cls())
                 else:
                     results.append(cls)
+            except InvalidConfiguration as e:
+                current_app.logger.warning("Plugin '{0}' may not work correctly. {1}".format(class_name, e))
             except Exception as e:
-                current_app.logger.exception('Unable to import %s. Reason: %s', cls_path, e)
+                current_app.logger.exception("Unable to import {0}. Reason: {1}".format(cls_path, e))
                 continue
         self.cache = results
 

lemur/common/utils.py

@@ -14,6 +14,8 @@ from cryptography.hazmat.backends import default_backend
 
 from flask_restful.reqparse import RequestParser
 
+from lemur.exceptions import InvalidConfiguration
+
 paginated_parser = RequestParser()
 
 paginated_parser.add_argument('count', type=int, default=10, location='args')
@@ -61,6 +63,4 @@ def validate_conf(app, required_vars):
     """
     for var in required_vars:
         if not app.config.get(var):
-            raise Exception("Required variable {var} is not set, ensure that it is set in Lemur's configuration file".format(
-                var=var
-            ))
+            raise InvalidConfiguration("Required variable '{var}' is not set in Lemur's conf.".format(var=var))