Monitor a web app with web server logs

This sample script creates a resource group, app service plan, and web app, and configures the web app to enable web server logs. It then downloads the log files for review.

If you don't have an Azure subscription, create a free account before you begin.

Open Azure Cloud Shell

Azure Cloud Shell is a free, interactive shell that you can use to run the steps in this article. Common Azure tools are preinstalled and configured in Cloud Shell for you to use with your account. Just select the Copy button to copy the code, paste it in Cloud Shell, and then press Enter to run it. There are a few ways to open Cloud Shell:

Select Try It in the upper-right corner of a code block. Cloud Shell in this article
Open Cloud Shell in your browser. https://shell.azure.com/bash
Select the Cloud Shell button on the menu in the upper-right corner of the Azure portal. Cloud Shell in the portal

If you choose to install and use the CLI locally, you need Azure CLI version 2.0 or later. To find the version, run az --version. If you need to install or upgrade, see Install the Azure CLI.

Sample script

#/bin/bash

# Variables
appName="AppServiceMonitor$random"
location="WestUS"

# Create a Resource Group
az group create --name myResourceGroup --location $location

# Create an App Service Plan
az appservice plan create --name AppServiceMonitorPlan --resource-group myResourceGroup --location $location

# Create a Web App and save the URL
url=$(az webapp create --name $appName --plan AppServiceMonitorPlan --resource-group myResourceGroup --query defaultHostName | sed -e 's/^"//' -e 's/"$//')

# Enable all logging options for the Web App
az webapp log config --name $appName --resource-group myResourceGroup --application-logging true --detailed-error-messages true --failed-request-tracing true --web-server-logging filesystem

# Create a Web Server Log
curl -s -L $url/404

# Download the log files for review
az webapp log download --name $webappname --resource-group myResourceGroup

Clean up deployment

After the sample script has been run, the following command can be used to remove the resource group and all resources associated with it.

az group delete --name myResourceGroup

Script explanation

This script uses the following commands to create a resource group, web app, and all related resources. Each command in the table links to command specific documentation.

Command Notes
az group create Creates a resource group in which all resources are stored.
az appservice plan create Creates an App Service plan.
az webapp create Creates an Azure web app.
az webapp log config Configures which logs an Azure web app persists.
az webapp log download Downloads the logs of an Azure web app to your local machine.

Next steps

For more information on the Azure CLI, see Azure CLI documentation.

Additional App Service CLI script samples can be found in the Azure App Service documentation.