azure ARm Template - Fails to associate AD app registration with function app - azure

Question

Background
I am trying to create an AD app registration for my function app to use for authentication.
I would like it to be for just our tenant, using Azure AD. The app is function app made up of a few endpoints
When I deploy the ARM template below, I don't get any errors, but in poking around and comparing it with what happens when I create authentication manually for my app, i see the following problems:
the application registration is created but there's no Application ID URI specified. When I create this manually via the portal I believe it's auto filled with a value "api://[applicationClientId]"
there are no scopes defined. again, when i create an authentication policy for my app manually via the portal, it does create a user_impersonation scope for me.
When i open up the function app in the portal, under "authentication" this new app registration hasn't been associated with it / or added.
Code
Here's what the ARM template looks like:
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"functionAppName": {
"type": "string",
"defaultValue": "[concat('widgets-', uniqueString(resourceGroup().id),'-app')]",
"minLength": 2,
"metadata": {
"description": "my function app"
}
},
"storageAccountName": {
"type": "string",
"defaultValue": "[concat('widgets', uniqueString(resourceGroup().id))]",
"minLength": 2,
"metadata": {
"description": "StorageAccount"
}
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]",
"metadata": {
"description": "Location for all resources."
}
},
"serviceBusNamespaceName": {
"type": "string",
"defaultValue": "[concat('widgets-', uniqueString(resourceGroup().id),'-bus')]",
"metadata": {
"description": "Name of the Service Bus namespace"
}
},
"serviceBusQueueName": {
"type": "string",
"defaultValue": "workspaces",
"metadata": {
"description": "Name of the Queue"
}
},
"queueAuthorizationRuleName": {
"type": "string",
"defaultValue": "myRule",
"metadata": {
"description": "Name of the Queue AuthorizationRule"
}
},
"aadAppClientId": {
"type": "string"
},
"tenant": {
"type": "string"
}
},
"variables": {
"appServicePlanPortalName": "[concat(parameters('functionAppName'),'servicePlan')]",
"appInsightsName": "[concat(parameters('functionAppName'),'-insights')]",
"identityName": "[concat(parameters('functionAppName'),'-userId')]",
"clientSecret": ""
},
"resources": [
{
"name": "[variables('identityName')]",
"type": "Microsoft.ManagedIdentity/userAssignedIdentities",
"apiVersion": "2018-11-30",
"location": "[parameters('location')]"
},
{
"type": "Microsoft.Storage/storageAccounts",
"name": "[parameters('storageAccountName')]",
"apiVersion": "2019-06-01",
"location": "[parameters('location')]",
"kind": "StorageV2",
"sku": {
"name": "Standard_LRS",
"tier": "Standard"
}
},
{
"type": "Microsoft.Storage/storageAccounts/queueServices",
"apiVersion": "2020-08-01-preview",
"name": "[concat(parameters('storageAccountName'), '/default')]",
"dependsOn": [
"[resourceId('Microsoft.Storage/storageAccounts', parameters('storageAccountName'))]"
],
"properties": {
"cors": {
"corsRules": []
}
}
},
{
"type": "Microsoft.Storage/storageAccounts/queueServices/queues",
"apiVersion": "2020-08-01-preview",
"name": "[concat(parameters('storageAccountName'), '/default/workspaces')]",
"dependsOn": [
"[resourceId('Microsoft.Storage/storageAccounts/queueServices', parameters('storageAccountName'), 'default')]",
"[resourceId('Microsoft.Storage/storageAccounts', parameters('storageAccountName'))]"
],
"properties": {
"metadata": {}
}
},
{
"type": "Microsoft.Storage/storageAccounts/tableServices/tables",
"apiVersion": "2021-06-01",
"name": "[concat(parameters('storageAccountName'), '/default/provisionedWorkspaces')]",
"dependsOn": [
"[resourceId('Microsoft.Storage/storageAccounts', parameters('storageAccountName'))]"
],
"properties": {
"partitionName": "workspaces"
}
},
{
"type": "Microsoft.ServiceBus/namespaces",
"apiVersion": "2017-04-01",
"name": "[parameters('serviceBusNamespaceName')]",
"location": "[parameters('location')]",
"sku": {
"name": "Standard"
},
"properties": {}
},
{
"type": "Microsoft.ServiceBus/namespaces/queues",
"apiVersion": "2017-04-01",
"name": "[format('{0}/{1}', parameters('serviceBusNamespaceName'), parameters('serviceBusQueueName'))]",
"properties": {
"lockDuration": "PT5M",
"maxSizeInMegabytes": 1024,
"requiresDuplicateDetection": false,
"requiresSession": false,
"defaultMessageTimeToLive": "P10675199DT2H48M5.4775807S",
"deadLetteringOnMessageExpiration": false,
"duplicateDetectionHistoryTimeWindow": "PT10M",
"maxDeliveryCount": 10,
"autoDeleteOnIdle": "P10675199DT2H48M5.4775807S",
"enablePartitioning": false,
"enableExpress": false
},
"resources": [
{
"apiVersion": "2017-04-01",
"name": "[parameters('queueAuthorizationRuleName')]",
"type": "AuthorizationRules",
"dependsOn": ["[parameters('serviceBusQueueName')]"],
"properties": {
"rights": ["Listen", "Send", "Manage"]
}
}
],
"dependsOn": [
"[resourceId('Microsoft.ServiceBus/namespaces', parameters('serviceBusNamespaceName'))]"
]
},
{
"apiVersion": "2015-05-01",
"name": "[variables('appInsightsName')]",
"type": "Microsoft.Insights/components",
"kind": "web",
"location": "[parameters('location')]",
"tags": {
"[concat('hidden-link:', resourceGroup().id, '/providers/Microsoft.Web/sites/', parameters('functionAppName'))]": "Resource"
},
"properties": {
"Application_Type": "web",
"ApplicationId": "[variables('appInsightsName')]"
}
},
{
"type": "Microsoft.Web/serverfarms",
"apiVersion": "2020-06-01",
"name": "[variables('appServicePlanPortalName')]",
"location": "[parameters('location')]",
"sku": {
"tier": "Standard",
"name": "S1"
},
"kind": "functionapp,linux",
"properties": {
"name": "[variables('appServicePlanPortalName')]",
"reserved": true
}
},
{
"type": "Microsoft.Web/sites",
"apiVersion": "2020-06-01",
"name": "[parameters('functionAppName')]",
"location": "[parameters('location')]",
"kind": "functionapp,linux",
"identity": {
"type": "UserAssigned",
"userAssignedIdentities": {
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', variables('identityName'))]": {}
}
},
"dependsOn": [
"[resourceId('Microsoft.Web/serverfarms', variables('appServicePlanPortalName'))]",
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', variables('identityName'))]"
],
"properties": {
"reserved": true,
"serverFarmId": "[resourceId('Microsoft.Web/serverfarms', variables('appServicePlanPortalName'))]",
"siteConfig": {
"linuxFxVersion": "DOTNETCORE|6.0",
"appSettings": [
{
"name": "APPINSIGHTS_INSTRUMENTATIONKEY",
"value": "[reference(resourceId('Microsoft.Insights/components', variables('appInsightsName')), '2015-05-01').InstrumentationKey]"
},
{
"name": "AzureWebJobsStorage",
"value": "[concat('DefaultEndpointsProtocol=https;AccountName=', parameters('storageAccountName'), ';EndpointSuffix=', environment().suffixes.storage, ';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', parameters('storageAccountName')), '2019-06-01').keys[0].value)]"
},
{
"name": "FUNCTIONS_EXTENSION_VERSION",
"value": "~4"
},
{
"name": "FUNCTIONS_WORKER_RUNTIME",
"value": "dotnet"
}
],
"resources": [
{
"type": "config",
"apiVersion": "2020-12-01",
"name": "authsettingsV2",
"location": "[resourceGroup().location]",
"dependsOn": [
"[concat('Microsoft.Web/sites/', parameters('functionAppName'))]"
],
"properties": {
"platform": {
"enabled": true,
"runtimeVersion": "~1"
},
"identityProviders": {
"azureActiveDirectory": {
"isAutoProvisioned": false,
"registration": {
"clientId": "[parameters('aadAppClientId')]",
"clientSecret": "[variables('clientSecret')]",
"openIdIssuer": "[concat('https://sts.windows.net/', parameters('tenant'), '/v2.0')]"
},
"validation": {
"allowedAudiences": [
"https://management.core.windows.net/"
]
}
}
}
},
"login": {
"routes": {},
"tokenStore": {
"enabled": true,
"tokenRefreshExtensionHours": 72,
"fileSystem": {},
"azureBlobStorage": {}
},
"preserveUrlFragmentsForLogins": false,
"allowedExternalRedirectUrls": [],
"cookieExpiration": {
"convention": "FixedTime",
"timeToExpiration": "08:00:00"
},
"nonce": {
"validateNonce": true,
"nonceExpirationInterval": "00:05:00"
}
},
"globalValidation": {
"redirectToProvider": "azureactivedirectory",
"unauthenticatedClientAction": "RedirectToLoginPage"
},
"httpSettings": {
"requireHttps": true,
"routes": {
"apiPrefix": "/.auth"
},
"forwardProxy": {
"convention": "NoProxy"
}
}
}
]
}
}
}
]
}
Two comments in case they help / are relevant:
client secret - As you can see I have a variable defined, but its blank. I'm not supplying a client secret value because I was assuming it would auto create for me. But maybe I shouldn't include that parameter at all?
Also, I'm using a linux container for the web app.
Any tips on how to fix these issues would be appreciated.
EDIT 1
I manually created and added an authencation policy and then I've been using resources.azure.com to see what's been created for me. I have two relevant sections under config.
One is called authsettings and looks like this:
And the other is under authsettingsV2 and looks like this:
I'm trying to use the authsettingsV2 for now... but it's not clear where I should paste it into in the ARM template.
Any suggestions?
EDIT 2
Added all the authsettingsv2 stuff under the site resource. No errors. but still the same results.

Answer 1

Found out that I can use the Az Powershell commandlets:
New-AzADApplication
New-AzADAppCredential