Docker Alpine (mcr.microsoft.com/dotnet/runtime) - Resolve "Microsoft.WindowsAzure.Storage.StorageException: Only the invariant culture is supported in globalization-invariant mode."

.NET app running with mcr.microsoft.com/dotnet/runtime docker alpine images, might run into issue "Microsoft.WindowsAzure.Storage.StorageException: Only the invariant culture is supported in globalization-invariant mode" if your app is requiring globalization. Let's look at what needs to be done to get the issue fixed.

The error

fail: Host.Startup[0]

      The listener for function 'Functions.MyDemoAsync' was unable to start.

      Microsoft.Azure.WebJobs.Host.Listeners.FunctionListenerException: The listener for function 'Functions.MyDemoAsync' was unable to start.

       ---> Microsoft.WindowsAzure.Storage.StorageException: Only the invariant culture is supported in globalization-invariant mode. See https://aka.ms/GlobalizationInvariantMode for more information. (Parameter 'name')

      en-US is an invalid culture identifier.

       ---> System.Globalization.CultureNotFoundException: Only the invariant culture is supported in globalization-invariant mode. See https://aka.ms/GlobalizationInvariantMode for more information. (Parameter 'name')

      en-US is an invalid culture identifier.

         at System.Globalization.CultureInfo..ctor(String name, Boolean useUserOverride)

         at Microsoft.WindowsAzure.Storage.Core.Util.AuthenticationUtility.AppendCanonicalizedCustomHeaders(CanonicalizedString canonicalizedString, HttpRequestMessage request)

         at Microsoft.WindowsAzure.Storage.Core.Auth.SharedKeyCanonicalizer.CanonicalizeHttpRequest(HttpRequestMessage request, String accountName)

         at Microsoft.WindowsAzure.Storage.Auth.Protocol.StorageAuthenticationHttpHandler.GetSharedKeyAuthenticationTask(StorageRequestMessage request, CancellationToken cancellationToken)

         at Microsoft.WindowsAzure.Storage.Auth.Protocol.StorageAuthenticationHttpHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

         at System.Net.Http.HttpMessageInvoker.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

         at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)

         at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.ExecuteAsyncInternal[T](RESTCommand`1 cmd, IRetryPolicy policy, OperationContext operationContext, CancellationToken token)

         --- End of inner exception stack trace ---

         at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.ExecuteAsyncInternal[T](RESTCommand`1 cmd, IRetryPolicy policy, OperationContext operationContext, CancellationToken token)

         at Microsoft.Azure.EventHubs.Processor.PartitionManager.InitializeStoresAsync()

         at Microsoft.Azure.EventHubs.Processor.PartitionManager.StartAsync()

         at Microsoft.Azure.EventHubs.Processor.EventProcessorHost.RegisterEventProcessorFactoryAsync(IEventProcessorFactory factory, EventProcessorOptions processorOptions)

         at Microsoft.Azure.WebJobs.EventHubs.EventHubListener.StartAsync(CancellationToken cancellationToken)

         at Microsoft.Azure.WebJobs.Host.Listeners.FunctionListener.StartAsync(CancellationToken cancellationToken, Boolean allowRetry) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Listeners\FunctionListener.cs:line 68

      Request Information

      RequestID:

      RequestDate:

      StatusMessage:

      ErrorCode:

The fix

You should add below two lines to your base image  which is used in your as the final runtime image, to add International Components for Unicode (ICU).

RUN apk add --no-cache icu-data-full icu-libs
ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false

Then use the base image as final image.

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "DemoApp.dll"]

To learn more refer to Runtime configuration options for globalization.