Are applications hosted in an App Service / Web App considered serverless?

Question

Sorry for the dumb question. But if I have a requirement to build a "serverless" system in Azure consisting of an Blazor Server app deployed to an App Service, is that considered serverless, despite the application being a Blazor Server app?

Answer 1

Hi @BrownMi

From a similar topic at https://learn.microsoft.com/en-us/answers/questions/122589/is-app-service-serverless.html (answered by LeonLaude)

As far as I know Azure App Service is not serverless, but you can leverage it on serverless by using Azure Function, also if you check the Azure App Service plans, each plan defines the region, number of VM instances etc...

For more information, see:

App Service overview
https://learn.microsoft.com/en-us/azure/app-service/overview

Azure App Service plan overview
https://learn.microsoft.com/en-us/azure/app-service/overview-hosting-plans

Hopefully this helps.

----------------------------

If this is helpful please accept answer.

Answer 2

NO, a blazor server app is by no means serverless. its the complete opposite. connections are persistent, reconnect requires server affinity, every connection maintains client state in server memeory. the blazor sever app also requires signal/r support on the server. A Blazor server app is heavy on CPU, Memory and bandwidth. Scaling also requires scale out. if hosting azure, you should use azure signal/r to support load balancing.

but a Blazor WASM with azure function webapi is a server less solution. use static web app hosting:

https://learn.microsoft.com/en-us/azure/static-web-apps/deploy-blazor