Azure Durable Functions - where's the HostBuilder equivalent?

Question

I'm using an Azure Durable Function<\/a> to orchestrate other functions, currently contained in the same project. I want to configure services and logging for those orchestrated functions. How can I do that?

var host = new HostBuilder()
    .ConfigureFunctionsWorkerDefaults()
    .ConfigureLogging(loggingBuilder => { loggingBuilder.SetMinimumLevel(LogLevel.Trace); })... etc. pp.

Answer 1

By default the ILogger instance is injected in your functions, unless you are using DI.All you need to do is Use the ILogger.

[FunctionName("funcname")]
public async static Task RunOrchestrator(
    [OrchestrationTrigger] DurableOrchestrationContext context,
    ILogger log)
{
    log.LogInformation("Starting Orchestration");
}

Check Incase if you using Dependency injection you should just do the below in your startup builder.Services.AddLogging();

Also check

Answer 2

So the solution is to use a FunctionsStartup<\/code> class as outlined here<\/a> . This should make dependency injection work, also for Durable Functions.

What I tried is adding an additional parameter ( myService<\/code> ) to the static methods like so:

[FunctionName("DurableFunctionsOrchestrationCSharp1_Hello")]
public static string SayHello([ActivityTrigger] string name, ILogger log, IMyService myService)
{
    log.LogInformation($"Saying hello to {name}.");
    return $"Hello {name}!";
}