1. Advanced Azure Template Functions
Awesome Deployment
Advanced Azure Template Functions
James Bannan
Principal Consultant
Vibrato

2. Principal Consultant
Vibrato (
From Melbourne / Australia
Microsoft Azure MVP
Pluralsight Author
Author: Learn System Center Configuration Manager in a Month of Lunches

3. ARM template function docs
resource-manager/resource-group-template- functions

4. Function types Numeric functions (e.g. addition, subtraction)
String functions (e.g. concat, substring, toLower)
Array functions (e.g. concat, length)
Deployment functions (e.g. parameters, variables)
Resource functions: (e.g. resourceGroup, resourceId)

5. Demo Scenario Subnets Network Security Groups User Defined Routes
Storage account
Virtual network
Subnets
Network Security Groups
User Defined Routes
Linux VMs

6. Environment Requirements
Fully templated
Automated build
Resource isolation
Utilise deployment state
Minimise template size

7. Demo:
Storage Deployment

8. resourceGroup() {
"id": "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}",
"name": "{resourceGroupName}",
"location": "{resourceGroupLocation}",
"tags": { },
"properties": {
"provisioningState": "{status}" }
"resources": [ {
"name": "[variables('storageAccountName')]",
"type": "Microsoft.Storage/storageAccounts",
"location": "[resourceGroup().location]",
... } ]

9. uniqueString
"storageAccountName": "[concat(demo', uniqueString(resourceGroup().id))]"
"storageAccountName": "[concat(demo', abcdefghijklm)]"
"storageAccountName": “demoabcdefghijklm"

10. Demo:
Network Deployment

11. Arrays as parameters "parameters": { "subnetProperties": {
"value": [ {
"name": "subnet-dmz-a",
"ipRange": " /24" },
"name": "subnet-dmz-b",
"ipRange": " /24"
... ] }
"parameters": {
"subnetProperties": {
"type": "array", },
... }
"subnets": [ {
"name": "[parameters('subnetProperties')[0].Name]",
"properties": {
"addressPrefix": "[parameters('subnetProperties')[0].ipRange]",
"networkSecurityGroup": {
"id": "[reference('nsgMaster').outputs.nsgIds.value[0]]" },
"routeTable": {
"id": "[reference('udrMaster').outputs.udrIds.value[0]]" }
... ]

12. reference "outputs": { "nsgID": { "type": "string",
"nsgIDs": {
"type": "array",
"value": [
"[reference(concat(parameters('subnetProperties')[0].Name,'-nsg')).outputs.nsgID.value]",
"[reference(concat(parameters('subnetProperties')[1].Name,'-nsg')).outputs.nsgID.value]",
... ] }
"outputs": {
"nsgID": {
"type": "string",
"value": "[resourceId('Microsoft.Network/networkSecurityGroups',parameters('nsgNa me'))]" }
"subnets": [ {
"name": "[parameters('subnetProperties')[0].Name]",
"properties": {
"addressPrefix": "[parameters('subnetProperties')[0].ipRange]",
"networkSecurityGroup": {
"id": "[reference('nsgMaster').outputs.nsgIds.value[0]]" },

13. Demo:
VM Deployment

14. Use array length to determine copy count
copyIndex
“count” = 4
"resources": [ {
"name": "[concat(‘website-', copyIndex())]",
"type": "Microsoft.Web/sites",
"copy": {
"name": "websitecopy",
"count": "[parameters('count')]" },
... } ]
copyIndex() 1 2 3
copyIndex(1) 1 2 3 4
Use array length to determine copy count

15. length { "name": "[parameters('vmProperties')[copyIndex()].vmName]",
"type": "Microsoft.Compute/virtualMachines",
"location": “westus2",
"apiVersion": " ",
"copy": {
"name": "vmCopy",
"count": "[length(parameters('vmProperties'))]" },
"dependsOn": [
"vmNicCopy" ],
... }
"parameters": {
"vmProperties": {
"value": [ {
"vmName": “vm1",
"vmSize": "Standard_F1",
"vmAdminUsername": "vmAdmin",
"subnetName": "subnet-app-a",
"ipAddress": " ",
"vmImagePublisher": "OpenLogic",
"vmImageOffer": "CentOS",
"vmOSVersion": "7.3" },
... ] }

16. Mastering Microsoft Azure Resource Manager
microsoft-azure-resource-manager- mastering

17. Advanced Azure Template Functions
Awesome Deployment
Advanced Azure Template Functions
James Bannan
Principal Consultant
Vibrato