So I have a solution which is using App Configuration and Managed Identity.

A function app is linked to ServiceBus as a trigger, to use managed identity it needs a configuration parameter called ServiceBusConnection__fullyQualifiedNamespace. If I add that to me local.settings then the functions will run. So I know the ServiceBus and Identity is set up correctly.

If I add this to my App Configuration then it won't run, in App Configuration you have to replace the __ with a : or similar.

When the function app starts I can look at the configuration settings. And in those settings I can see the ServiceBusConnection:fullyQualifiedNamespace correctly and the provider is App Configuration, so I know that the connection to App Configuration is working okay.

I have tried many combinations and so far have not made any progress. The errors I get vary depending on setting but usually

"The listener for function 'Functions.TbQueueTrigger' was unable to start. Azure.Messaging.ServiceBus: The connection string could not be parsed; either it was malformed or contains no well-known tokens"

But the string contains exactly the same (FQN) as the local.settings. Now this is when I have the settings in both local.settings AND AppConfiguration. If I look in the Config data I can see the App Configuration choices and not the local.settings.

If I remove the parameters from local.settings then the error is

"The listener for function 'Functions.TbQueueTrigger' was unable to start. Microsoft.Azure.WebJobs.Extensions.ServiceBus: Service Bus account connection string with name 'ServiceBusConnection' does not exist in the settings. Make sure that it is a defined App Setting."

So I looks like the function trigger is NOT looking in App Configuration at all. In which case the Run is decorated as such

   public async Task Run([ServiceBusTrigger("notifications-dev", Connection = "ServiceBusConnection")]
        ServiceBusReceivedMessage message
        )

So what am I missing? How can I force the trigger to use App Configuration here? Is there a better way to decorate the function or ensure that the ServiceBus is set up correctly?

thanks!

So I have a solution which is using App Configuration and Managed Identity.

A function app is linked to ServiceBus as a trigger, to use managed identity it needs a configuration parameter called ServiceBusConnection__fullyQualifiedNamespace. If I add that to me local.settings then the functions will run. So I know the ServiceBus and Identity is set up correctly.

If I add this to my App Configuration then it won't run, in App Configuration you have to replace the __ with a : or similar.

When the function app starts I can look at the configuration settings. And in those settings I can see the ServiceBusConnection:fullyQualifiedNamespace correctly and the provider is App Configuration, so I know that the connection to App Configuration is working okay.

I have tried many combinations and so far have not made any progress. The errors I get vary depending on setting but usually

"The listener for function 'Functions.TbQueueTrigger' was unable to start. Azure.Messaging.ServiceBus: The connection string could not be parsed; either it was malformed or contains no well-known tokens"

But the string contains exactly the same (FQN) as the local.settings. Now this is when I have the settings in both local.settings AND AppConfiguration. If I look in the Config data I can see the App Configuration choices and not the local.settings.

If I remove the parameters from local.settings then the error is

"The listener for function 'Functions.TbQueueTrigger' was unable to start. Microsoft.Azure.WebJobs.Extensions.ServiceBus: Service Bus account connection string with name 'ServiceBusConnection' does not exist in the settings. Make sure that it is a defined App Setting."

So I looks like the function trigger is NOT looking in App Configuration at all. In which case the Run is decorated as such

   public async Task Run([ServiceBusTrigger("notifications-dev", Connection = "ServiceBusConnection")]
        ServiceBusReceivedMessage message
        )

So what am I missing? How can I force the trigger to use App Configuration here? Is there a better way to decorate the function or ensure that the ServiceBus is set up correctly?

thanks!

• azure
• azure-functions
• servicebus
• azure-app-configuration

• Please share your Program.cs file. – Harshitha Commented Nov 19, 2024 at 9:09
• @paulinventome Make sure your Azure Function App is set up to read from Azure App Configuration by implementing the AddAzureAppConfiguration() method in Program.cs and enabling Managed Identity for authentication. – Dasari Kamali Commented Nov 19, 2024 at 9:17
• Why are you not using Azure Key Vault for your settings? – Svein Terje Gaup Commented Nov 19, 2024 at 9:19

1 Answer 1

ServiceBus, Managed ID, Azure Functions and App Configuration not working together

It worked for me using below process:

Firstly created a function and deployed to azure and then in Environment Variables:

I have given Azure Service Bus Receiver role to Function app's identity:

Output:

If you have integrated in App Configuration service then you need to follow steps:

Firstly create:

then IAM give the App Conjuration Data Owner and Contributor role:

Then wait for 10 min and then add this to Environment Variables:

@Microsoft.AppConfiguration(Endpoint=https://rithwik98.azconfig.io; Key=test)

After adding then pull reference.

Output: