Terraform – Specifying parameters to azurerm_resource_group_template_deployment

Here is a quick example on how to provide parameters to azurerm_resource_group_template_deployment, as the documentation is currently very poor.

Here is a quick main.tf:

variable "location" {
  default     = "westeurope"
  type        = string
  description = "The Azure location where all resources in this example should be created"
}

provider "azurerm" {
    features {} 
}

data "azurerm_client_config" "current" {}
data "azurerm_subscription" "current" {}

resource "azurerm_resource_group" "rg" {
    name     = "testResourceGroup1"
    location = var.location
}


resource "azurerm_resource_group_template_deployment" "example" {
    name                = "testLogicApp1"
    resource_group_name = azurerm_resource_group.rg.name
    deployment_mode     = "Complete"
    template_content    = file("logicapp.json")

    parameters_content =  jsonencode({
        azure_location                    = {value = azurerm_resource_group.rg.location}
        name                              = {value = "testLogicApp1"}
        azure_function_code               = {value = "testtesttest"}
    })
}

As you can see, the parameters_content is converted from a Terraform object to JSON using jsonencode, and all values must be provided like you would define parameters using az deployment, with “value=xx”.

And this is my ARM template for the LogicApp:

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "azure_location": {
            "defaultValue": "westeurope",
            "type": "string"
        },
        "name": {
            "type": "String"
        },
        "azure_function_code": {
            "type": "String"
        }
    },
    "variables": {
    },
    "outputs": {
        "principalId": {
            "type": "string",
            "value": "[reference(concat(resourceId('Microsoft.Logic/workflows', parameters('name')), '/providers/Microsoft.ManagedIdentity/Identities/default'), '2018-11-30').principalId]"
        },
        "tenantid": {
            "type": "string",
            "value": "[reference(concat(resourceId('Microsoft.Logic/workflows', parameters('name')), '/providers/Microsoft.ManagedIdentity/Identities/default'), '2018-11-30').tenantid]"
        },
        "resourceId": {
            "type": "string",
            "value": "[resourceId('Microsoft.Logic/workflows', parameters('name'))]"
        }
    },
    "resources": [
        {
            "type": "Microsoft.Logic/workflows",
            "apiVersion": "2017-07-01",
            "name": "[parameters('name')]",
            "location": "[parameters('azure_location')]",
            "identity": {
                "type": "SystemAssigned"
            },
            "dependsOn": [
            ],
            "resources": [],
            "properties": {
                "state": "Enabled",
                "definition": {
                    "$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
                    "contentVersion": "1.0.0.0",
                    "parameters": {
                        "azurefunctioncode": {
                            "defaultValue": "[parameters('azure_function_code')]",
                            "type": "String"
                        }
                    },
                    "triggers": {
                        "Recurrence": {
                            "recurrence": {
                                "frequency": "Day",
                                "interval": 1,
                                "schedule": {
                                    "hours": [
                                        "2"
                                    ],
                                    "minutes": [
                                        5
                                    ]
                                }
                            },
                            "type": "Recurrence"
                        }
                    },
                    "actions": {
                        
                    },
                    "outputs": {}
                }
            }
        }
    ]
}

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