back to GunicornPrometheusMetrics, CollectoRegistry, port 9200

Dockerfile

@@ -101,6 +101,10 @@ ENTRYPOINT ["dumb-init", "--"]
 
 ENV PROMETHEUS_MULTIPROC_DIR /tmp
 ENV prometheus_multiproc_dir /tmp
+ENV METRICS_PORT 9200
+EXPOSE 9200
+
+COPY container/gunicorn_prometheus_config.py /src/
 
 # Start application
-CMD gunicorn --worker-class sync --workers 5 --bind 0.0.0.0:8000 wsgi:app --keep-alive 5 --log-level info
+CMD gunicorn -c /src/gunicorn_prometheus_config.py --worker-class sync --workers 5 --bind 0.0.0.0:8000 wsgi:app --keep-alive 5 --log-level info

container/gunicorn_prometheus_config.py

@@ -0,0 +1,11 @@
+import os
+
+from prometheus_flask_exporter.multiprocess import GunicornPrometheusMetrics
+
+
+def when_ready(server):
+    GunicornPrometheusMetrics.start_http_server_when_ready(int(os.getenv('METRICS_PORT')))
+
+
+def child_exit(server, worker):
+    GunicornPrometheusMetrics.mark_process_dead_on_child_exit(worker.pid)

container/wsgi.py

@@ -20,7 +20,7 @@
 import os
 import sys
 
-from prometheus_flask_exporter.multiprocess import GunicornInternalPrometheusMetrics
+from prometheus_flask_exporter.multiprocess import GunicornPrometheusMetrics
 from werkzeug.middleware.dispatcher import DispatcherMiddleware
 from prometheus_client import make_wsgi_app, CollectorRegistry
 from prometheus_client.core import REGISTRY
@@ -35,6 +35,6 @@
 app = App()
 REGISTRY.register(CollectorRegistry())
 app.wsgi_app = DispatcherMiddleware(app.wsgi_app, {
-    '/metrics': make_wsgi_app(REGISTRY)
+    '/metrics': make_wsgi_app(registry=REGISTRY)
 })
-GunicornInternalPrometheusMetrics(app, path='/metrics', registry=REGISTRY)
+GunicornPrometheusMetrics(app, path='/metrics', registry=REGISTRY)