Azure Blob Storage on IOT Edge offline

Question

I am looking to use the azure blob storage module on an iot edge device that needs to be able to be started up offline. The problem we are having is that on startup with no internet connect the azure blob storage won't started. All my other modules work offline just having issues with azure blob storage. Is the blob storage able to be started offline like the sql server logs? Here is the logs:

Starting Azure Blob Storage on IoT Edge, version 1.4.1.0.
Unhandled exception. System.AggregateException: One or more errors occurred. (One or more errors occurred. (Transient network error occurred, please retry.))
 ---> System.AggregateException: One or more errors occurred. (Transient network error occurred, please retry.)
 ---> Microsoft.Azure.Devices.Client.Exceptions.IotHubCommunicationException: Transient network error occurred, please retry.
 ---> System.Net.Sockets.SocketException (104): Connection reset by peer
   at Microsoft.Azure.Devices.Client.Transport.Mqtt.MqttTransportHandler.OpenAsyncInternal(CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.Transport.Mqtt.MqttTransportHandler.OpenAsync(CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.Transport.ProtocolRoutingDelegatingHandler.OpenAsync(CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.<>c__DisplayClass22_0.<<ExecuteWithErrorHandlingAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.ExecuteWithErrorHandlingAsync[T](Func`1 asyncOperation)
   --- End of inner exception stack trace ---
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.ExecuteWithErrorHandlingAsync[T](Func`1 asyncOperation)
   at Microsoft.Azure.Devices.Client.Transport.RetryDelegatingHandler.<>c__DisplayClass32_0.<<OpenAsyncInternal>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Azure.Devices.Client.Transport.RetryDelegatingHandler.EnsureOpenedAsync(CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.Transport.RetryDelegatingHandler.<>c__DisplayClass23_0.<<EnableTwinPatchAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Azure.Devices.Client.Transport.RetryDelegatingHandler.EnableTwinPatchAsync(CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.InternalClient.SetDesiredPropertyUpdateCallbackAsync(DesiredPropertyUpdateCallback callback, Object userContext, CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.InternalClient.SetDesiredPropertyUpdateCallbackAsync(DesiredPropertyUpdateCallback callback, Object userContext)
   at Microsoft.Azure.Devices.BlobStorage.IoT.ModuleTwinConfigurationProvider.Initialize()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait()
   at Microsoft.Azure.Devices.BlobStorage.IoT.ModuleTwinConfigurationProvider..ctor(ModuleClient iotModuleClient)
   at Microsoft.Azure.Devices.BlobStorage.IoT.ModuleTwinConfigurationSource.Build(IConfigurationBuilder builder)
   at Microsoft.Extensions.Configuration.ConfigurationBuilder.Build()
   at Microsoft.Extensions.Hosting.HostBuilder.BuildAppConfiguration()
   at Microsoft.Extensions.Hosting.HostBuilder.Build()
   at Microsoft.AzureStack.Services.Storage.FrontEnd.Program.BuildServices(String[] args)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait()
   at Microsoft.AzureStack.Services.Storage.FrontEnd.Program.Main(String[] args)

Answer 1

Jeffrey Greetings!

Azure Blob Storage on IoT Edge module requires an internet connection to start up. If there is no internet connection, the module will not start. However, once the module is started, it can continue to run offline as long as it has access to the local storage.

If you need to use Azure Blob Storage on IoT Edge module in an offline environment, you can consider using Azure Blob Storage SDKs for .NET, Java, Python, and other languages to interact with Blob Storage directly from your code. This way, you can store and retrieve data from Blob Storage without requiring an internet connection.

You can find more information on how to use Azure Blob Storage SDKs.

Do let me know if you have any further queries.