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pythonazureloggingazure-functionsazure-application-insights

Why can not I see logs in Azure Function app?

I am working on Azure Function App (Python on Linux), but I am unable to view the logs.

When I go to web portal to the Function App - tab Log Stream, the page never loads. There is just a spinning circle.

The same happens when I open the Function itself and go to "Code + Test". The console says, Connecting to Application Insights..., but it never loads.

The Function App is not linked to "Application Insights". But to my understanding I do not need to create Application Insights resource to just see simple logs. Or am I wrong?

I am quite new to Azure, so I appreciate any help!

In this post one of the users says that log streaming has been limited, so I assume that I am facing the similar issue. I have tried using VS Code extension Azure to stream logs, but it also requires Application Insights. Error: You must configure Application Insights to stream logs on Linux Function Apps.

Do I really have to create Application Insights resource? (It's complicated for me to create new resource due to corporate structure)

Edit:

As requested I am adding the code. I don't think that the issue is with the code itself. I am unable to view any logging page in Azure web portal as well as I am unable to stream logs to VS Code. The issues occurs even before running the code.

I am expecting to see at least something. Any print or log statement, or even error message. But I am unable to anything.

Also here here are some screenshots from Azure Portal and the issues I am facing.

""" function_app.py """
import azure.functions as func
import logging
@app.route(route="http_trigger_test")
def http_trigger_test(req: func.HttpRequest) -> func.HttpResponse:
    logging.info('Python HTTP trigger function processed a request.')
    return func.HttpResponse(f"Code finished", status_code=200)


""" requirements.txt """
# DO NOT include azure-functions-worker in this file
# The Python Worker is managed by Azure Functions platform
# Manually managing azure-functions-worker may cause unexpected issues
azure-functions


""" http_trigger_test.json """
{
    "name": "http_trigger_test",
    "entryPoint": "http_trigger_test",
    "scriptFile": "function_app.py",
    "language": "python",
    "functionDirectory": "/home/site/wwwroot",
    "bindings": [
        {
            "direction": "IN",
            "type": "httpTrigger",
            "name": "req",
            "authLevel": "ANONYMOUS",
            "route": "http_trigger_test"
        },
        {
            "direction": "OUT",
            "type": "http",
            "name": "$return"
        }
    ]
}
Solution

  • The Function App is not linked to "Application Insights". But to my understanding I do not need to create Application Insights resource to just see simple logs. Or am I wrong?

    For getting simple logs or complex logs will definitely use application insights, there is no other option to get logs. Refer this SO for further clarification.

    I have created http trigger function by using vs code and it ran successfully.

    enter image description here

    I have deployed the above function into azure portal. check below:

    enter image description here

    Before enable the application insights, when I tried to visit logs getting like below:

    enter image description here

    I was enabled the application insights and rans the function successfully in portal. check below:

    enter image description here

    I was able to see the logs after enabled the application insights. check below:

    Output:

    enter image description here