supporting the ability to push exceptions to sentry (#843)

lemur/extensions.py

@@ -20,3 +20,6 @@ smtp_mail = Mail()
 
 from lemur.metrics import Metrics
 metrics = Metrics()
+
+from raven.contrib.flask import Sentry
+sentry = Sentry()

lemur/factory.py

@@ -19,7 +19,7 @@ from logging.handlers import RotatingFileHandler
 
 from flask import Flask
 from lemur.common.health import mod as health
-from lemur.extensions import db, migrate, principal, smtp_mail, metrics
+from lemur.extensions import db, migrate, principal, smtp_mail, metrics, sentry
 
 
 DEFAULT_BLUEPRINTS = (
@@ -121,6 +121,7 @@ def configure_extensions(app):
     principal.init_app(app)
     smtp_mail.init_app(app)
     metrics.init_app(app)
+    sentry.init_app(app)
 
 
 def configure_blueprints(app, blueprints):

setup.py

@@ -62,6 +62,7 @@ install_requires = [
     'retrying==1.3.3',
     'tabulate==0.7.7',
     'pem==16.1.0',
+    'raven[flask]==6.1.0',
     'paramiko==2.2.1'  # required for lemur_linuxdst plugin
 ]