![]() ![]() Key Vault references work for both App Services and Function Apps and are particularly useful for existing applications that have their secrets stored in settings because securing the secrets with Azure Key Vault references does not require any code change. When running, your function will automatically have access to the secret and its value as an environment variable, as if it was a normal application setting. ![]() These are called Key Vault references because an application setting does not contain directly the value of a secret but a reference to the secret which is stored in Key Vault. Once your secrets are in the key vault, you have to grant the Key Vault access to the identity of your Function App and you can then reference the secrets you need directly in your application settings. The right way is to use an Azure Key Vault which is the Azure component for securely storing and accessing secrets □. Why not? Because secrets would be available to anyone who has access to the Function App in the Azure Portal. Speaking of secrets, they should never be directly stored in the application settings of a Function App (the same goes for App Services by the way). Furthermore, this file should never be committed to avoid putting settings corresponding to secrets in source control. But as its name suggests, the purpose of this file is to be used for local development only: its settings are not used when the function runs on Azure. ![]() The settings from will be loaded as environment variables when debugging locally. When developing locally you have to use a file that will contain copies of the settings stored in Azure portal. ![]() A quick reminder about configuration and secrets in Azure FunctionsĬonfiguration used by functions in a Function App is stored in settings that can be set in the Configuration section of a Function App in Azure Portal. But that is not the only reason, it is also because with this feature you almost don't need to use key vault references!īut before deep dive into this topic, let's give a bit of context about configuration and secrets in Azure Functions (just skip the next section if you already are familiar with all that). I have been waiting for this feature for a long time (like many people I think) because it brings to Azure Functions all the things we are used to with configuration in ASP.NET Core □. The possibility to add configuration sources in Azure Functions has just been released with the latest version of NuGet package. ![]()
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