How to tag Current time as a Tag for an ARM Deployment - azure

Question

I am trying to create a Log Analytics Workspace using an ARM template and a parameter files. I am also thinking to tag currrent time as CreatedOn tag for the resource.
Below is my ARM template-
{
"$schema": "http://schema.management.azure.com/schemas/2014-04-01-preview/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"LAWName": {
"type": "string"
},
"LocationName": {
"type": "string"
},
"SKUName": {
"type": "string"
},
"Tags": {
"type": "object"
}
},
"resources": [
{
"apiVersion": "2017-03-15-preview",
"name": "[parameters('LAWName')]",
"location": "[parameters('LocationName')]",
"tags": "[parameters('Tags')]",
"type": "Microsoft.OperationalInsights/workspaces",
"properties": {
"sku": {
"name": "[parameters('SKUName')]"
}
}
}
]
}
and here is my param file-
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"LAWName": {
"value": "atifmtest1"
},
"LocationName": {
"value": "westeurope"
},
"SKUName": {
"value": "pergb2018"
}
"Tags": {
"value": {
"CreatedBy": "Atif",
"CreatedOn": "[utcNow()]",
"Purpose": "Monitoring"
}
}
}
}
I read here https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/template-functions-date#utcnow that there is utcNow() function for ARM template but that is being considered as a string here and the current time does not appear as a tag for the resource.
What is the other way using which this can be achieved ?
Thanks in advance !!

Answer 1

Here is a working example:
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"utcShort": {
"type": "string",
"defaultValue": "[utcNow('d')]"
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]"
}
},
"resources": [
{
"apiVersion": "2019-04-01",
"type": "Microsoft.Storage/storageAccounts",
"name": "[concat('storage', uniqueString(resourceGroup().id))]",
"location": "[parameters('location')]",
"tags": {
"Dept": "Finance",
"Environment": "Production",
"LastDeployed": "[parameters('utcShort')]"
},
"sku": {
"name": "Standard_LRS"
},
"kind": "Storage",
"properties": {}
}
]
}
Source.

Answer 2

Please follow the below steps for better results.
Add the utcShort in parameters and give a default value "[utcNow()]", Its not work from the parameters file. add utcShort into variables to make an object type. Follow the below steps.
"utcShort ": {
"type": "string",
"defaultValue": "[utcNow()]"
},
"resourceTags": {
"type": "object"
}
},
"variables":{
"createdDate": {
"createdDate": "[parameters('utcShort ')]"
}
},
Use this variable in Tags like below..
"tags": "[union(parameters('resourceTags'), variables('createdDate'))]"