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# general

sparse-intern-71089

10/26/2021, 10:14 AM

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brave-planet-10645

10/26/2021, 3:02 PM

Hey, your

Main()

method should look like this:

Copy code

static Task Main()
    {
        var serviceCollection = new ServiceCollection();
        var serviceProvider = serviceCollection
                                .AddSingleton<MyStack>()
                                .BuildServiceProvider();

        return Deployment.RunAsync<MyStack>(serviceProvider);
    }

So you're not registering

Stack

in thesingleton, just

MyStack

👍 1

bored-oyster-3147

10/26/2021, 3:15 PM

^. The

Deployment

is trying to resolve for

MyStack

which you provided via

RunAsync<MyStack>

but you only have it registered as

Stack

bored-oyster-3147

10/26/2021, 3:19 PM

Also note that if this is just a trivial example and in practice you will be running multiple deployments against the same

IServiceProvider

than you will want to make sure that it is registered as

Transient

instead of

Singleton

. Pulumi relies on the stack actually being instantiated within the deployment so if you run multiple deployments against the same service provider instance than only the first deployment will actually work when it is registered as singleton. But if you're actually just running it as a console application in practice, like your example, than singleton will suffice.

💯 1

bumpy-grass-54508

10/26/2021, 4:03 PM

also make sure your Main returns

Task<int>

or you can get into some trouble if your stack throws any exceptions: https://github.com/pulumi/pulumi/issues/7050#issuecomment-851580328

☝️ 1

worried-city-86458

10/26/2021, 7:00 PM

I'm running a console app but with multiple passes for preview then update. Use a transient lifetime. https://github.com/gitfool/Pulumi.Dungeon/blob/master/Cli/HostBuilderExtensions.cs#L43

blue-pharmacist-31672

10/27/2021, 11:02 AM

@brave-planet-10645 Thank you so much! That worked perfectly.

blue-pharmacist-31672

10/27/2021, 11:02 AM

Thank you @bored-oyster-3147 and @bumpy-grass-54508 for your tips on improving this as well 😄

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