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Title
# dotnet
m

mysterious-australia-14256

07/23/2021, 9:26 AM
Can anyone provide information on how to use a stack reference with C# and Azure? As an example I have one project that is creating a Log Analytics Workspace (Pulumi.AzureNative.OperationalInsights.Workspace) that I need to reference from additional projects. I have tried outputting the workspace object using
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[Output]
public Output<Pulumi.AzureNative.OperationalInsights.Workspace> LogAnalyticsWorkspace { get; set; }
That seems to go out OK with the results something like
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Outputs:
  + LogAnalyticsWorkspace: {
      + URN: "urn:pulumi:<stackname>::<projectname>::azure-native:resources:ResourceGroup$azure-native:operationalinsights:Workspace::<workspacename>"
      + ID : "/subscriptions/<subscriptionid>/resourcegroups/<resourcegroupname>/providers/microsoft.operationalinsights/workspaces/<workspacename>"
      + PackageVersion: ""
    }
However when I try create a stack reference in the second project with the following code I get an error
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var coreStackReference = new StackReference("coreStackReference", new StackReferenceArgs
{
	Name = "<stackname>",
});
The error is
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invocation of pulumi:pulumi:getResource returned an error: unknown resource urn:pulumi:<stackname>::<projectname>::azure-native:resources:ResourceGroup$azure-native:operationalinsights:Workspace::<workspacename>
Is it incorrect to try and pass objects in this way? I don't seem to get the errors when just passing strings so do I need to just pass IDs rather than objects and then rehydrate them somehow?
b

brave-planet-10645

07/23/2021, 9:39 AM
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var other = new StackReference("<stackname>");
var otherOutput = other.GetOutput("x");
m

mysterious-australia-14256

07/23/2021, 9:54 AM
Thanks @brave-planet-10645. I am still getting the same error using the above syntax though. In the top level project I am creating my workspace and storing it in a variable called workspace (type Pulumi.AzureNative.OperationalInsights.Workspace). In order to pass this to
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[Output]
public Output<Pulumi.AzureNative.OperationalInsights.Workspace> LogAnalyticsWorkspace { get; set; }
I am using
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this.LogAnalyticsWorkspace = Pulumi.Output.Create(workspace);
Does that look correct?
b

brave-planet-10645

07/23/2021, 9:56 AM
I think that's because you're passing a resource between stacks. You can't do that. I suggest passing the name of the resource, and then using the
GetWorkspace
method in the second project to get the values you need. https://www.pulumi.com/docs/reference/pkg/azure-native/operationalinsights/getworkspace/
m

mysterious-australia-14256

07/23/2021, 9:57 AM
OK thanks
@brave-planet-10645 OK I think I'm making progress. I can pass across the names happily now. I am passing the resourceGroupName and the workspaceName as the getWorkspace function seems to need both. They get read into the second project as types Output<string> so I can't pass them to getWorkspace directly as it only accepts strings. I can work around this with some ugly code like
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var ws = Pulumi.Output.Tuple(resourceGroupName, workspaceName).Apply(names =>
{
	return Pulumi.AzureNative.OperationalInsights.GetWorkspace.InvokeAsync(new Pulumi.AzureNative.OperationalInsights.GetWorkspaceArgs
	{
		ResourceGroupName = names.Item1,
		WorkspaceName = names.Item2
     });
});
Am I overcomplicating things with the above or is that the only way? That still only returns me an Output<GetWorkspaceResult> so I assume I would then need to use something like Pulumi.AzureNative.OperationalInsights.Workspace.Get to get at the actual workspace. If so then I guess I can just pass IDs between projects and skip the getWorkspace piece altogether and just use Workspace.Get...? Am I missing something or does that look like the basic process?
b

brave-planet-10645

07/23/2021, 10:38 AM
if you just need the IDs, just have the IDs as outputs