feat: add prometheus flask metrics

app/__init__.py

@@ -20,12 +20,14 @@ from app.models.automation import Automation, AutomationState
 from app.portal import portal
 from app.portal.report import report
 from app.tfstate import tfstate
+from prometheus_flask_exporter import PrometheusMetrics
 
 app = Flask(__name__)
 app.config.from_file("../config.yaml", load=yaml.safe_load)
 
 # create new registry to avoid multiple metrics registration in global REGISTRY
 registry = CollectorRegistry()
+metrics = PrometheusMetrics(app, registry=registry)
 
 app.wsgi_app = DispatcherMiddleware(app.wsgi_app, {  # type: ignore[method-assign]
     '/metrics': make_wsgi_app(registry)
@@ -137,6 +139,7 @@ class AutomationCollector(Collector):
                 ok.add_metric(["automation_state"], 0)
             yield ok
 
+
 # register all custom collectors to registry
 if not_migrating() and 'DISABLE_METRICS' not in os.environ:
     registry.register(DefinedProxiesCollector())

requirements.txt

@@ -17,6 +17,7 @@ markupsafe
 nose
 openpyxl
 prometheus_client
+prometheus_flask_exporter
 pytest
 python-dateutil
 python-gitlab