Connect an App Service app to Cosmos DB using CLI

This sample script creates an Azure Cosmos DB account using the Azure Cosmos DB's API for MongoDB and an App Service app. It then links a MongoDB connection string to the web app using app settings.

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. Select Copy 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. Example of Try It for Azure Cloud Shell
Open Cloud Shell in your browser. Launch Azure Cloud Shell button
Select the Cloud Shell button on the menu in the upper-right corner of the Azure portal. Cloud Shell button in the Azure 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 Azure CLI.

Sample script

#/bin/bash

# Variables
appName="webappwithcosmosdb$RANDOM"
location="WestUS"

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

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

# Create a Web App
az webapp create --name $appName --plan myAppServicePlan --resource-group myResourceGroup 

# Create a Cosmos DB with MongoDB API
az cosmosdb create --name $appName --resource-group myResourceGroup --kind MongoDB

# Get the MongoDB URL
connectionString=$(az cosmosdb list-connection-strings --name $appName --resource-group myResourceGroup \
--query connectionStrings[0].connectionString --output tsv)

# Assign the connection string to an App Setting in the Web App
az webapp config appsettings set --name $appName --resource-group myResourceGroup \
--settings "MONGODB_URL=$connectionString" 

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, Cosmos DB, 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 cosmosdb create Creates a Cosmos DB account.
az cosmosdb list-connection-strings Lists connection strings for the specified Cosmos DB account.
az webapp config appsettings set Creates or updates an app setting for an App Service app. App settings are exposed as environment variables for your app.

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.