Monitor an App Service app with web server logs using Azure CLI

This sample script creates a resource group, App Service plan, and app, and configures the 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.

Use Azure Cloud Shell

Azure hosts Azure Cloud Shell, an interactive shell environment that you can use through your browser. You can use either Bash or PowerShell with Cloud Shell to work with Azure services. You can use the Cloud Shell preinstalled commands to run the code in this article without having to install anything on your local environment.

To start Azure Cloud Shell:

Option Example/Link
Select Try It in the upper-right corner of a code block. Selecting Try It doesn't automatically copy the code to Cloud Shell. Example of Try It for Azure Cloud Shell
Go to https://shell.azure.com, or select the Launch Cloud Shell button to open Cloud Shell in your browser. Launch Cloud Shell in a new window
Select the Cloud Shell button on the menu bar at the upper right in the Azure portal. Cloud Shell button in the Azure portal

To run the code in this article in Azure Cloud Shell:

  1. Start Cloud Shell.

  2. Select the Copy button on a code block to copy the code.

  3. Paste the code into the Cloud Shell session by selecting Ctrl+Shift+V on Windows and Linux or by selecting Cmd+Shift+V on macOS.

  4. Select Enter to run the code.

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, App Service 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 App Service app.
az webapp log config Configures which logs an App Service app persists.
az webapp log download Downloads the logs of an App Service 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.