Right method to create CustomScript in Azure JSON template - json

Question

I am trying add a custom PowerShell script to an ARM template.
I have tried it in many different ways and always get an error, wrong URI, couldn't find file, or something similar. Could you guys please correct me?
So in variables I have the path to the file:
"CustomScriptScript": https://raw.githubusercontent.com/starwinddeploy/azure-sw-cluster/master/scripts/CustomScript.ps1
In the resource section I have a VM with another resource:
{
"type": "Microsoft.Compute/virtualMachines",
"resources": [
{
"name": "CustomScript",
"type": "extensions",
"location": "[parameters('location')]",
"apiVersion": "2015-06-15",
"dependsOn": [
"[concat('Microsoft.Compute/virtualMachines/', concat(variables('vmName'), copyindex(1)))]"
],
"tags": {
"displayName": "CustomScript"
},
"properties": {
"publisher": "Microsoft.Compute",
"type": "CustomScriptExtension",
"typeHandlerVersion": "1.4",
"autoUpgradeMinorVersion": true,
"settings": {
"fileUris": [
"[concat(variables('CustomScriptScript'))]"
],
"commandToExecute": "[concat('powershell -ExecutionPolicy Unrestricted -File ', variables('CustomScriptScript'))]"
}
}
}
]
}

Answer 1

I see a couple problems:
Change "type": "extensions" to "type": "Microsoft.Compute/virtualMachines/extensions"
Variable CustomScriptScript should be the URI of the ps1 file that you want to execute. It doesn't make sense to try and use it as the URI, and then in commandToExecute use it as the name of the script. You would need two different variables.
There may be other mistakes in your template. I would recommend starting with this template: https://github.com/Azure/azure-quickstart-templates/blob/master/201-vm-custom-script-windows/azuredeploy.json
Once you have that working, modify it to fit your needs.