How does azure function app with python code updates azure app insights

Azure Application Insights helps monitor logs, exceptions, performance metrics, and telemetry data for Azure Functions. To integrate Python-based Azure Functions with Application Insights, follow these steps:

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1. Prerequisites

Azure Function App (Python)

Azure Application Insights Resource

Instrumentation Key or Connection String

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2. Enable Application Insights for Azure Function App

Option 1: Enable via Azure CLI

az monitor app-insights component create --app <APP_INSIGHTS_NAME> --resource-group <RESOURCE_GROUP> --location eastus

az functionapp config appsettings set --name <FUNCTION_APP_NAME> --resource-group <RESOURCE_GROUP> \

    --settings "APPINSIGHTS_INSTRUMENTATIONKEY=<YOUR_INSTRUMENTATION_KEY>"

OR use the Connection String (recommended for newer versions):

az functionapp config appsettings set --name <FUNCTION_APP_NAME> --resource-group <RESOURCE_GROUP> \

    --settings "APPLICATIONINSIGHTS_CONNECTION_STRING=<YOUR_CONNECTION_STRING>"

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3. Install & Configure Application Insights in Python

Install the Azure Monitor OpenTelemetry SDK:

pip install opentelemetry-sdk opentelemetry-exporter-azure-monitor

Modify your __init__.py to include Application Insights logging:

import logging

import azure.functions as func

from opentelemetry.sdk.trace import TracerProvider

from opentelemetry.sdk.trace.export import SimpleSpanProcessor

from opentelemetry.exporter.azuremonitor import AzureMonitorSpanExporter

# Setup Application Insights Telemetry

instrumentation_key = "<YOUR_INSTRUMENTATION_KEY>"  # Or fetch from env variable

tracer = TracerProvider()

tracer.add_span_processor(SimpleSpanProcessor(AzureMonitorSpanExporter.from_connection_string(instrumentation_key)))

def main(req: func.HttpRequest) -> func.HttpResponse:

    logging.info("Processing request...")

    return func.HttpResponse("Hello from Azure Function with App Insights!")

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4. Verify Logs in Application Insights

1. Go to Azure Portal → Application Insights

2. Navigate to Logs → Run the following Kusto Query:

traces

| where timestamp > ago(10m)

| order by timestamp desc

3. Check if your function's logs appear.