Azure Classroomnotes 10/Aug/2023

ARM Templates contd

• When we apply the template developed so far

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "resources": [
        {
            "type": "Microsoft.Network/virtualNetworks",
            "apiVersion": "2022-09-01",
            "name": "ntier",
            "location": "East US",
            "tags": {
                "env": "dev"
            },
            "properties": {
                "addressSpace": {
                    "addressPrefixes": [ "10.10.0.0/16" ]
                },
                "subnets": [
                    {
                        "name": "web",
                        "properties": {
                            "addressPrefix": "10.10.0.0/24"
                        }
                    },
                    {
                        "name": "app",
                        "properties": {
                            "addressPrefix": "10.10.1.0/24"
                        }
                    },
                    {
                        "name": "db",
                        "properties": {
                            "addressPrefix": "10.10.2.0/24"
                        }
                    }
                ]

            }
        }
    ]
}

• This will always create network in east us region with address space 10.10.0.0/16 and it creates 3 subnets

Change 1: I want to make a change which will create this network in the resource group’s location rather than east us always

• lets use functions in ARM Templates Refer Here and there is a function called as resourceGroup Refer Here
• Refer Here for changes.

Change 2: I want to give an option to the user to set address space for network and subnets

• To acheive this i should be using parameters Refer Here
• ARM Templates support the following types Refer Here
  • Array
  • bool
  • int
  • object
  • secureObject
  • secureString
  • string
• Refer Here for the changes
• Now lets apply latest changes
  
  
  
  

Change 3: Create subnets depending on the variable passed

• Subnets are childs to vnets and Refer Here for better understanding of parent child
• Refer Here for the changes done to add subnets as outside resources rather than with in network resource
• Refer Here for fixing order of creation
• Now lets implement resource iteration using copy Refer Here
• Refer Here for the changeset containing subnet creation depending on the subnet cidr ranges passed