Unable to use Connection string URI in python flask app on Google App Engine

[Parayya]

I'm deploying python flask application on Google App Engine(runtime: python27), which uses database connection and I'm using Mongodb Atlas connection string uri.
But I'm getting the error as 'ServerSelectionTimeoutError:SeverSe..denied'.

[shane....@10gen.com]

MongoDB Atlas blocks connections from unknown IP addresses by default. Have you whitelisted your Google App Engine IP address? https://docs.atlas.mongodb.com/security-whitelist/

[Parayya]

Thanks for the reply Shane,

I allowed it to access public(0.0.0.0/0). I'm getting error at Mongodb insert operation.

[Wan Bachtiar]

I allowed it to access public(0.0.0.0/0). I’m getting error at Mongodb insert operation.

Hi Parayya,

Could you post the exact error stacktrace that you’re getting ?
Are you getting the error message when you’re developing locally ?

If the error is related to some restrictions on Google App Engine side (i.e. sockets ), I’d suggest to post the question at Google App Engine Community forum to reach a more suitable audience.

Regards,
Wan.

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[Parayya]

Hi Wan Bachtiar,

Yes, It is working fine local server.
But in GAE I'm getting error at line where I'm inserting a document into mongodb.
I'm getting error as 'ServerSelectionTimeoutError: ServerSe...denied',)'.
Not able to do any operations (CRUD) on database. And I'm using MongoDB connection string URI and its working fine locally.

[Wan Bachtiar]

I’m using MongoDB connection string URI and its working fine locally.

Hi Parayya,

Try to contact Google Cloud Platform Support to make sure that the necessary sockets/ports are available from within Google App Engine to connect to an external database.

Regards,
Wan.

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