How to deploy NestJS with TCP listener on function app

Question

How to deploy NestJS with TCP listener on function app

Brad Wong 1

I have some problems on NestJS microservice. The microservice is using TCP listener and follow NestJS documentation to develop all services on my localhost. Everything is good and able to run without issue. However, when I install Azure Function App and build the Apps with:

npm run start:azure

On my microservices and API entity point(REST API) The TCP listener is stop working.

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Answer 1

MayankBargali-MSFT 70,936 Moderator

@Brad Wong The only way an application can be accessed via the internet is through the already-exposed HTTP (80) and HTTPS (443) TCP ports. Applications may not listen on other ports for packets arriving from the internet as mentioned in this document. If you are trying to create the service on any other port or apart from HTTP/HTTPS protocol then it may not work.

To start with creating Node JS function app I will suggest you to review this document. In case if I misunderstand your requirement please share the reference document if any you are following deployed your application on the azure function app and if there are any/error exception.

Brad Wong 1 Reputation point

2022-03-07T22:16:58.377+00:00

Hi @MayankBargali-MSFT ,

Thank you very much to answer my question.
So the only way to get this feature able to work is service bus?
If yes, I will let NestJS people know about it and ask them to put some documentation on:
https://docs.nestjs.com/microservices/basics
And let people know Azure function apps not support TCP pipe.

Regards
Brad
MayankBargali-MSFT 70,936 Reputation points Moderator

2022-03-08T09:00:36.043+00:00

@Brad Wong Looking into the nestjs document it is the framework for building the server-side application and you can create node js application in azure function but on specific ports as I mentioned previously. Quick search I can find third-party documents on the steps on deploying NestJS to azure function but as I am not an expert on nestjs how does it create the framework and if they use the default port while communicating.

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How to deploy NestJS with TCP listener on function app

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