Unable to Add DSC Extension JSON ARM

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I'm trying to add an extension to an azure arm template, so when it loops around it adds the extension to each vm.

The full JSON is at the link below: https://pastebin.com/embed_iframe/7uvwdZ6e

The error I'm getting is:

Error: Code=InvalidTemplate; Message=Deployment template validation failed: 'The resource 'Microsoft.Compute/virtualMachines/vmt1dsc/extensions/CreateADPDC' at line 
'0' and column '0' is defined multiple times in a template.

CreateADPDC' is the name of the extension.

Thanks in advance :)

dsc azure-template arm-template azure powershell
1 Answers

your dsc extension (line 444, I believe) is this (and because of that it complains it is defined multipli times):

"name": "[concat(parameters('VMNames'),'/',parameters('vmNameDscConfig'))]",

but should be this:

"name": "[parameters('vmNameDscConfig')]",

small remark, you need full name\type for "sub" resource (think subnet, vm extension, nsg rule, etc) if you are declaring it as a stand alone resource, but yours is a nested resource of the VM resource, so type should be extensions, just like with other extensions, not:

"type": "Microsoft.Compute/virtualMachines/extensions",
user_60677410
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