Azure Resource Manager Template Functions

• To give additional functionality to ARM template as we are working on json format
• All the functions are documented here

Excercise

• To use copyIndex along with Copy to create 3 subnets

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion" : "1.0.0.0",
    "parameters": {
        "vnetaddresspace": {
            "type": "array",
            "defaultValue":["192.168.0.0/16"] 

        },
        "count": {
            "type" : "int",
            "defaultValue" : 3
        }
    },
    "resources":[
        {
            "name": "fromarm",
            "type": "Microsoft.Network/virtualNetworks",
            "apiVersion": "2019-04-01",
            "location": "Central US",
            "properties": {
                "addressSpace": {
                    "addressPrefixes": "[parameters('vnetaddresspace')]"
                }

            } 
        },
        {
            "name": "subnet1",
            "type": "Microsoft.Network/virtualNetworks/subnets",
            "apiVersion": "2019-04-01",
            "properties": {
                "addressPrefix": "192.168.0.0/24"
            },
            "dependsOn": ["fromarm"],
            "copy": { 
                "name": "websitescopy", 
                "count": "[parameters('count')]" 
            }
                        
        }

    ]
}

• This needs to be corrected.
• Correct this using the following template

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion" : "1.0.0.0",
    "parameters": {
        "vnetaddresspace": {
            "type": "array",
            "defaultValue":["192.168.0.0/16"] 

        },
        "count": {
            "type" : "int",
            "defaultValue" : 3
        },
        "subnetnames":{
            "type": "array",
            "defaultValue": ["web", "business","data"]
        },
        "subnetAddress":{
            "type": "array",
            "defaultValue": ["192.168.0.0/24","192.168.1.0/24", "192.168.2.0/24"]
        }
    },
    "resources":[
        {
            "name": "fromarm",
            "type": "Microsoft.Network/virtualNetworks",
            "apiVersion": "2019-04-01",
            "location": "Central US",
            "properties": {
                "addressSpace": {
                    "addressPrefixes": "[parameters('vnetaddresspace')]"
                }

            } 
        },
        {
            "name": "<Replace this with parametres & Copy Index>",
            "type": "Microsoft.Network/virtualNetworks/subnets",
            "apiVersion": "2019-04-01",
            "properties": {
                "addressPrefix": "<Replace this with parametres & Copy Index>"
            },
            "dependsOn": ["fromarm"],
            "copy": { 
                "name": "websitescopy", 
                "count": "[parameters('count')]" 
            }
                        
        }

    ]
}

• In the subnet resource use parameters. Use copyIndex function to get the current iteration.