azure function app managed identity key vault

A managed identity from Azure Active Directory allows your app to easily access other AAD-protected resources such as Azure Key Vault. We will now create a new PowerShell Function App that will use Managed Service Identity to retrieve credentials from an Azure Key Vault. Navigate to the “Platform features” tab and select “Identity”: From your Azure Function App, next to Functions select the + to create a New Function. This article shows how Azure Key Vault could be used together with Azure Functions. After enabling the managed service identity, I went into my key vault and added an access policy so my Azure Function app had permissions to read secrets. I’m using a HttpTrigger PowerShell Function. By using the Microsoft.Azure.KeyVault and the Microsoft.Extensions.Configuration.AzureKeyVault … Even though Azure App Configuration can keep secrets and keys, App Configuration is not designed to do this. I’m no developer, so this information is all based on the examples in the documentation. Prerequisites: This article assumes that you have a basic idea on Prerequisites. Creating a New Azure Function App that uses Managed Service Identity. Therefore, we need a combination of Azure App Configuration and Key Vault. If not, links to more information can be found throughout the article. By using Access Policies on the Azure Key Vault, we can grant access to the Azure Function App, and if it's using Managed Identity it can do this without credentials anywhere in configuration. Before we can use Azure Key Vault secrets in the Azure Function code, we have to assign a Managed Identity to it. Figure: Key vault Access policy When an app setting is defined like this, the Azure Functions runtime will use the Managed Identity to access the Key Vault and read the secret. The Azure Functions can use the system assigned identity to access the Key Vault. Figure: Enabling system assigned managed identity on Function app Next step is to add a rule to the key vault’s access policies for the service principal created in earlier step. This will create a service principal with the same name as Azure Function application you have. Our Managed Identity now has access to Key Vault. Step 6 - Accessing the secrets in Azure Functions Once we've set this all up, an Azure Function can simply access the secret by reading the environment variable with the app setting name. This needs to be configured in the Key Vault access policies using the service principal. Now we have MI setup, and with access to our Key Vault, we need to update our application to be able to use it. NOTE: This article assumes you have a good handle on Azure-managed Identity and Key Vault. The identity is managed by the Azure platform and does not require you to provision or rotate any secrets. Using Managed Identity in our Application. Grant the Function App access to the Azure Key Vault. This below procedure is to demonstrate how Azure function app access key vault using Azure managed identity. This is recommended. If you are not familiar with Managed Identities, I encourage you to read more in this article. However, in order to retrieve keys and secrets from Azure Key Vault, you need to authorize a user or application with Azure Key Vault, which in its turn needs another credential. Enable system-asigned managed identity for the Function App. This article demonstrates how you can take advantage of Azure App Configuration with Azure-managed Identity and Key Vault. As Azure Function App that will use Managed service Identity to it such as Azure Function App next! On Azure-managed Identity and Key Vault could be used together with Azure Functions a new Function Key..., next to Functions select the + to create azure function app managed identity key vault new PowerShell Function App access to the Azure application. 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