Fixed Azure resource name through Aspire

[mip1983]

Today if you do something like:

var cosmos = builder.AddAzureCosmosDB("ecoDriverCosmosDb");

You'll get a unique name generated in the bicep:
name: toLower(take('ecoDriverCosmosDb${uniqueString(resourceGroup().id)}', 24))

It makes sense that it does the safe thing by default, but is there any way to override this in Aspire (without having to drop down into the Bicep) to a fixed name (no uniqueString)?

It would be quite handy for provisioning a fixed instance within the scope of a resource group. Locally it could provision or use the existing resource with that name, like a shared development database. It would be handy in multi-solution scenarios, not having to copy a connection string round, it can just go off and find that fixed resource.

Also it would look prettier in Azure, and I could make things a bit more readable for me.

[davidfowl]

cc @eerhardt

[eerhardt]

.NET Aspire 9 added a better way to enable this. There are 2 ways to do this:

1. Locally per resource

builder.AddAzureCosmosDB("ecoDriverCosmosDb")
    .ConfigureInfrastructure(infrastructure =>
    {
        // set the resource's Name to a fixed value
        var cosmosAccount = infrastructure.GetProvisionableResources().OfType<CosmosDBAccount>().Single();
        cosmosAccount.Name = "ecoDriverCosmosDb";
    })

2. Globally across all resources

var builder = DistributedApplication.CreateBuilder(args);

builder.Services.Configure<AzureProvisioningOptions>(options =>
{
    options.ProvisioningBuildOptions.InfrastructureResolvers.Insert(0, new FixedNameInfrastructureResolver());
});

builder.AddAzureCosmosDB("ecoDriverCosmosDb")

// ...

internal sealed class FixedNameInfrastructureResolver : InfrastructureResolver
{
    public override void ResolveProperties(ProvisionableConstruct construct, ProvisioningBuildOptions options)
    {
        if (construct is CosmosDBAccount account) // whatever check you want here
        {
            account.Name = "ecoDriverCosmosDb";
        }

        base.ResolveProperties(construct, options);
    }
}

NOTE: if you are using 9.0.0-rc.1, the above code won't work. We changed some names in between rc1 and 9.0 GA. To do this in 9.0-rc1, use the following code:

builder.AddAzureCosmosDB("ecoDriverCosmosDb")
    .ConfigureConstruct(infrastructure =>
    {
        // set the resource's Name to a fixed value
        var cosmosAccount = infrastructure.GetResources().OfType<CosmosDBAccount>().Single();
        cosmosAccount.Name = "ecoDriverCosmosDb";
    })

and

builder.Services.Configure<AzureResourceOptions>(options =>
{
    options.ProvisioningContext.PropertyResolvers.Insert(0, new FixedNameInfrastructureResolver());
});

builder.AddAzureCosmosDB("ecoDriverCosmosDb")

// ...

internal sealed class FixedNameInfrastructureResolver : PropertyResolver
{
    public override void ResolveProperties(ProvisioningContext context, ProvisioningConstruct construct)
    {
        if (construct is CosmosDBAccount account) // whatever check you want here
        {
            account.Name = "ecoDriverCosmosDb";
        }
    }
}