Azure Classroomnotes 30/Jun/2022

Inbuilt Functions in arm templates

• Functions in arm templates can be called with the following syntax "[<function>(arg1, arg2....,argn)]"
• ARM Template functions Refer Here
• To define parameters in ARM Templates Refer Here
• For creating iterations in ARM Templates Refer Here
• Refer Here for the changes done in the template and below for the complete template

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "primaryregion": {
            "type": "string",
            "metadata": {
                "description": "This is the primary region"
            },
            "defaultValue": "southindia"
        },
        "secondaryregion": {
            "type": "string",
            "metadata": {
                "description": "This is the primary region"
            },
            "defaultValue": "centralindia"
        },
        "primary-cidr": {
            "type": "string",
            "metadata": {
                "description": "This is the primary vnet address space"
            },
            "defaultValue": "10.0.0.0/16"
        },
        "secondary-cidr": {
            "type": "string",
            "metadata": {
                "description": "This is the secondary vnet address space"
            },
            "defaultValue": "10.1.0.0/16"
        },
        "subnet-names": {
            "type": "array",
            "metadata": {
                "description": "subnet name"
            },
            "defaultValue": ["web", "app", "db", "mgmt"]
        },
        "primary-subnet-cidr-format": {
            "type": "string",
            "metadata": {
                "description": "subnet cidr format"
            },
            "defaultValue": "10.0.{0}.0/24"
        },
        "secondary-subnet-cidr-format": {
            "type": "string",
            "metadata": {
                "description": "subnet cidr format"
            },
            "defaultValue": "10.1.{0}.0/24"
        }

    },
    "resources": [
        {
            "type": "Microsoft.Network/virtualNetworks",
            "apiVersion": "2020-11-01",
            "name": "primaryvnet",
            "location": "[parameters('primaryregion')]",
            "properties": {
                "addressSpace": {
                    "addressPrefixes": [ "[parameters('primary-cidr')]" ]
                }
            }
        },
        {
            "type": "Microsoft.Network/virtualNetworks/subnets",
            "apiVersion": "2020-11-01",
            "name": "[format('primaryvnet/{0}',parameters('subnet-names')[copyIndex()])]",
            "properties": {
                "addressPrefix": "[format(parameters('primary-subnet-cidr-format'),copyIndex())]"
            },
            "copy": {
                "name": "primary-subnet-copy",
                "count": "[length(parameters('subnet-names'))]",
                "mode": "Serial"

            },
            "dependsOn": [
                "[resourceId('Microsoft.Network/virtualNetworks','primaryvnet')]"
            ]

        },
        {
            "type": "Microsoft.Network/virtualNetworks",
            "apiVersion": "2020-11-01",
            "name": "secondaryvnet",
            "location": "[parameters('secondaryregion')]",
            "properties": {
                "addressSpace": {
                    "addressPrefixes": [ "[parameters('secondary-cidr')]" ]
                }
            }
        },
        {
            "type": "Microsoft.Network/virtualNetworks/subnets",
            "apiVersion": "2020-11-01",
            "name": "[format('secondaryvnet/{0}',parameters('subnet-names')[copyIndex()])]",
            "properties": {
                "addressPrefix": "[format(parameters('secondary-subnet-cidr-format'),copyIndex())]"
            },
            "copy": {
                "name": "secondary-subnet-copy",
                "count": "[length(parameters('subnet-names'))]",
                "mode": "Serial"

            },
            "dependsOn": [
                "[resourceId('Microsoft.Network/virtualNetworks','secondaryvnet')]"
            ]

        }
    ]
}

• Try deploying
  
• Note: fix in the template try this template and deploy