Add readiness check for S3

camdetect.py

@@ -483,6 +483,16 @@ async def stream_wrapper(request):
 
 @app.route("/readyz")
 async def ready_check(request):
+    # Check if S3 is accessible
+    session = aioboto3.Session()
+    async with session.resource("s3",
+        aws_access_key_id=AWS_ACCESS_KEY_ID,
+        aws_secret_access_key=AWS_SECRET_ACCESS_KEY,
+        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