Avoid registering Flask endpoint in forked debug mode, Fixes #4

prometheus_flask_exporter/__init__.py

@@ -5,6 +5,7 @@
 
 from flask import request, make_response
 from flask import Flask, Response
+from werkzeug.serving import is_running_from_reloader
 from werkzeug.exceptions import HTTPException
 from prometheus_client import Counter, Histogram, Gauge, Summary
 from prometheus_client import generate_latest, CONTENT_TYPE_LATEST
@@ -99,6 +100,9 @@ def register_endpoint(self, path, app=None):
             (by default it is the application registered with this class)
         """
 
+        if is_running_from_reloader():
+            return
+
         if app is None:
             app = self.app
 
@@ -124,6 +128,9 @@ def start_http_server(self, port, host='0.0.0.0', endpoint='/metrics'):
             (default: `/metrics`)
         """
 
+        if is_running_from_reloader():
+            return
+
         app = Flask('prometheus-flask-exporter-%d' % port)
         self.register_endpoint(endpoint, app)
 
@@ -423,4 +430,4 @@ def info(self, name, description, labelnames=None, labelvalues=None, **labels):
         return gauge
 
 
-__version__ = '0.2.0'
+__version__ = '0.2.1'

setup.py

@@ -8,14 +8,14 @@
 setup(
     name='prometheus_flask_exporter',
     packages=['prometheus_flask_exporter'],
-    version='0.2.0',
+    version='0.2.1',
     description='Prometheus metrics exporter for Flask',
     long_description=long_description,
     license='MIT',
     author='Viktor Adam',
     author_email='rycus86@gmail.com',
     url='https://github.com/rycus86/prometheus_flask_exporter',
-    download_url='https://github.com/rycus86/prometheus_flask_exporter/archive/0.2.0.tar.gz',
+    download_url='https://github.com/rycus86/prometheus_flask_exporter/archive/0.2.1.tar.gz',
     keywords=['prometheus', 'flask', 'monitoring', 'exporter'],
     classifiers=[
         'Development Status :: 4 - Beta',