Enhance health check endpoint

actnow/health.py

@@ -1,14 +1,20 @@
+from django.db import OperationalError, connections
 from rest_framework import status
-from rest_framework.decorators import api_view
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.permissions import AllowAny
+from rest_framework.request import Request
 from rest_framework.response import Response
 
-from .petitions.models import Petition
-
 
 @api_view(["GET"])
-def health_check(request):
+@permission_classes([AllowAny])
+def health_check(request: Request) -> Response:
+    """Meta view to check the status of core services."""
+    data = {"status": "healthy", "detail": "server and core services available"}
     try:
-        Petition.objects.count()
-        return Response(status=status.HTTP_200_OK)
-    except Exception:
-        return Response(status=status.HTTP_503_SERVICE_UNAVAILABLE)
+        connections["default"].cursor()
+    except OperationalError:
+        data["status"] = "unhealthy"
+        data["detail"] = "unable to connect to database server"
+        return Response(data=data, status=status.HTTP_503_SERVICE_UNAVAILABLE)
+    return Response(data=data, status=status.HTTP_200_OK)

docker-compose.yml

@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   db:
     image: postgres:13.3