Reorder readiness check

camdetect.py

@@ -484,6 +484,16 @@ async def stream_wrapper(request):
 
 @app.route("/readyz")
 async def ready_check(request):
+    if app.ctx.mask is None:
+        return response.text("Not enough frames", status=503)
+
+    # Check if Mongo is accessible
+    try:
+        async for i in app.ctx.coll.find().limit(1):
+            break
+    except pymongo.errors.ServerSelectionTimeoutError:
+        return response.text("MongoDB server selection timeout", status=503)
+
     # Check if S3 is accessible
     session = aioboto3.Session()
     async with session.resource("s3",
@@ -492,15 +502,6 @@ async def ready_check(request):
                                 endpoint_url=S3_ENDPOINT_URL) as s3:
         bucket = await s3.Bucket(S3_BUCKET_NAME)
         await bucket.upload_fileobj(io.BytesIO(b"test"), "test")
-
-    # Check if Mongo is accessible
-    try:
-        async for i in app.ctx.coll.find().limit(1):
-            break
-    except pymongo.errors.ServerSelectionTimeoutError:
-        return response.text("MongoDB server selection timeout", status=503)
-    if app.ctx.mask is None:
-        return response.text("Not enough frames", status=503)
     return response.text("OK")