Impossible to deploy to Function APP with ContainerClient

Question

I want to deploy a easy function to Azure. When i deploy with this code it's ok :

import azure.functions as func

@app = func.FunctionApp()
@app.function_name(name="echo")
@app.route(route="echo")
def echo_function(req: func.HttpRequest) -> func.HttpResponse:
    return func.HttpResponse("Echo OK")

I see in Azure Portal my function echo.

But when i add a new function to my function_app.py i don't see any function :

import azure.functions as func
from azure.storage.blob import ContainerClient
from azure.identity import ManagedIdentityCredential


@app.function_name(name="Logging")
@app.route(route="Logging")
def logging_function(req: func.HttpRequest) -> func.HttpResponse:
    credential = ManagedIdentityCredential()
    container_client = ContainerClient(account_url="https://sae2sbxfchpv00002.blob.core.windows.net",
                        container_name="f03temp",
                        credential=credential)
container_client.delete_container()

return func.HttpResponse(f"Blob", status_code=200)

My function app have a managed Identity enabled. I have a container name "f03temp" in my storage account. My fonction app have the "Data Storage contributor" acess for the storage account. In vs code i have all the librairies neccesary.

I can't test in local, because i don't have blob acess with my account.

Anyone can help me for understand? Thanks in advance

I want to see my function in Azure Portail after the deployment.

Mohsin Raza · Accepted Answer · 2025-09-16 13:16:50Z

1

import azure.functions as func
from azure.storage.blob import ContainerClient
from azure.identity import ManagedIdentityCredential

app = func.FunctionApp()

@app.function_name(name="echo")
@app.route(route="echo")
def echo_function(req: func.HttpRequest) -> func.HttpResponse:
    return func.HttpResponse("Echo OK")

@app.function_name(name="Logging")
@app.route(route="Logging")
def logging_function(req: func.HttpRequest) -> func.HttpResponse:
    try:
        credential = ManagedIdentityCredential()
        container_client = ContainerClient(
            account_url="https://sae2sbxfchpv00002.blob.core.windows.net",
            container_name="f03temp",
            credential=credential
        )
    
        container_client.delete_container()
        return func.HttpResponse("Container deleted successfully", status_code=200)
    
    except Exception as e:
        return func.HttpResponse(f"Error: {str(e)}", status_code=500)

Missing app initialization: You had @app but never created the app instance. Should be app = func.FunctionApp()
Code outside function scope: The container client operations were outside the function, which causes deployment issues. All Azure operations must be inside the function.
No error handling: Azure operations can fail, so proper error handling is essential.
Missing try-catch: Container operations should be wrapped in exception handling.

Test locally by using Azure CLI authentication:

az login

Verify permissions: Ensure your Function App's managed identity has "Storage Blob Data Contributor" role on the storage account.

answered Sep 16 at 13:16

Mohsin Raza

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1 Comment

Corentin Gerbout Sep 18 at 15:28

Hello, Thank you for your response. I made the change you mentioned. When I'm connected with the Azure CLI and I publish the code folder using: func azure functionapp publish fahpvs00001api --no-build I still encounter the same issue. If I only include the "echo" function in the code, it works — I can see it in Azure. But when I add the "Logging" function, I don't see either function in the Azure portal. In Azure, I can confirm that the files host.json, requirements.txt, and function_app.py are updated. But the result is the same. I don't understand why.

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