{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json",
    "contentVersion": "1.0.0.0",
    "apiProfile": "2018-03-01-hybrid",
    "parameters": {
        "vmSku": { 
            "defaultValue": "Standard_A1",
            "type": "String",
            "metadata": {
                "description": "Size of VMs in the VM Scale Set."
            }
        },
        "vmssName": {
            "type": "String",
            "defaultValue": "[substring(concat('vmss', uniquestring(replace(resourceGroup().Id,'-',''))), 0, 8)]",
            "metadata": {
                "description": "String used as a base for naming resources. Must be 3-10 characters in length and globally unique across Azure Stack. A hash is prepended to this string for some resources, and resource-specific information is appended."
            }
        },
        "instanceCount": {
            "defaultValue": 2,
            "maxValue": 20,
            "type": "Int",
            "metadata": {
                "description": "Number of VM instances (20 or less)."
            }
        },
        "adminUsername": {
            "type": "String",
            "defaultValue": "azureuser",
            "metadata": {
                "description": "Admin username on all VMs."
            }
        },
        "adminPassword": {
            "type": "SecureString",
            "defaultValue": "[concat('Subscription#', subscription().subscriptionId)]",
            "metadata": {
                "description": "Admin password on all VMs."
            }
        },
        "osImagePublisher": {
            "type": "string",
            "defaultValue": "MicrosoftWindowsServer",
            "metadata": {
                "description": "Maps to the publisher in the Azure Stack Platform Image Repository manifest file."
            }
        },
        "osImageOffer": {
            "type": "string",
            "defaultValue": "WindowsServer",
            "metadata": {
                "description": "Maps to the Offer in the Azure Stack Platform Image Repository manifest file."
            }
        },
        "osImageSku": {
            "type": "string",
            "defaultValue": "2016-Datacenter",
            "allowedValues": [
                "2012-R2-Datacenter",
                "2016-Datacenter-Server-Core",
                "2016-Datacenter"
            ],
            "metadata": {
                "description": "The Windows version for the VM. This will pick a fully patched image of this given Windows version. Allowed values: 2008-R2-SP1, 2012-Datacenter, 2012-R2-Datacenter."
            }
        }
    },
    "variables": {
        "location": "[resourceGroup().location]",
        "vnetName": "[toLower(concat('vnet', uniqueString(resourceGroup().id)))]",
        "subnetName": "[toLower(concat('subnet', uniqueString(resourceGroup().id)))]",
        "vnetID": "[resourceId('Microsoft.Network/virtualNetworks', variables('vnetName'))]",
        "subnetRef": "[concat(variables('vnetID'),'/subnets/', variables('subnetName'))]",
        "publicIPAddressName": "[toLower(concat('pip', uniqueString(resourceGroup().id)))]",
        "vmssDomainName": "[toLower(concat('pubdns', uniqueString(resourceGroup().id)))]",
        "loadBalancerName": "[concat('LB', uniqueString(resourceGroup().id))]",
        "loadBalancerFrontEndName": "[concat('LBFrontEnd', uniqueString(resourceGroup().id))]",
        "loadBalancerBackEndName": "[concat('LBBackEnd', uniqueString(resourceGroup().id))]",
        "loadBalancerProbeName": "[concat('LBHttpProbe', uniqueString(resourceGroup().id))]",
        "loadBalancerNatPoolName": "[concat('LBNatPool', uniqueString(resourceGroup().id))]"
    },
  "resources": [
    {
      "type": "Microsoft.Network/virtualNetworks",
      "name": "[variables('vnetName')]",
      "location": "[variables('location')]",
      "properties": {
        "addressSpace": {
          "addressPrefixes": [
            "10.0.0.0/16"
          ]
        },
        "subnets": [
          {
            "name": "[variables('subnetName')]",
            "properties": {
              "addressPrefix": "10.0.0.0/24"
            }
          }
        ]
      }
    },
    {
      "type": "Microsoft.Network/publicIPAddresses",
      "name": "[variables('publicIPAddressName')]",
      "location": "[variables('location')]",
      "properties": {
        "publicIPAllocationMethod": "Dynamic",
        "dnsSettings": {
          "domainNameLabel": "[variables('vmssDomainName')]"
        }
      }
    },
    {
      "type": "Microsoft.Network/loadBalancers",
      "name": "[variables('loadBalancerName')]",
      "location": "[variables('location')]",
      "properties": {
        "frontendIPConfigurations": [
          {
            "name": "[variables('loadBalancerFrontEndName')]",
            "properties": {
              "publicIPAddress": {
                "id": "[resourceId('Microsoft.Network/publicIPAddresses', variables('publicIPAddressName'))]"
              }
            }
          }
        ],
        "backendAddressPools": [
          {
            "name": "[variables('loadBalancerBackendName')]"
          }
        ],
        "loadBalancingRules": [
          {
            "name": "roundRobinLBRule",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('loadBalancerName')), '/frontendIPConfigurations/', variables('loadBalancerFrontEndName'))]"
              },
              "backendAddressPool": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('loadBalancerName')), '/backendAddressPools/', variables('loadBalancerBackendName'))]"
              },
              "protocol": "tcp",
              "frontendPort": 80,
              "backendPort": 80,
              "enableFloatingIP": false,
              "idleTimeoutInMinutes": 5,
              "probe": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('loadBalancerName')), '/probes/', variables('loadBalancerProbeName'))]"
              }
            }
          }
        ],
        "probes": [
          {
            "name": "[variables('loadBalancerProbeName')]",
            "properties": {
              "protocol": "tcp",
              "port": 80,
              "intervalInSeconds": "5",
              "numberOfProbes": "2"
            }
          }
        ],
        "inboundNatPools": [
          {
            "name": "[variables('loadBalancerNatPoolName')]",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('loadBalancerName')), '/frontendIPConfigurations/', variables('loadBalancerFrontEndName'))]"
              },
              "protocol": "tcp",
              "frontendPortRangeStart": "50000",
              "frontendPortRangeEnd": "50019",
              "backendPort": "3389"
            }
          }
        ]
      },
      "dependsOn": [
        "[concat('Microsoft.Network/publicIPAddresses/', variables('publicIPAddressName'))]"
      ]
    },
    {
      "type": "Microsoft.Compute/virtualMachineScaleSets",
      "sku": {
        "name": "[parameters('vmSku')]",
        "tier": "Standard",
        "capacity": "[parameters('instanceCount')]"
      },
      "name": "[parameters('vmssName')]",
      "location": "[variables('location')]",
      "properties": {
        "upgradePolicy": {
          "mode": "Manual"
        },
        "virtualMachineProfile": {
          "storageProfile": {
            "osDisk": {
              "caching": "ReadOnly",
              "createOption": "FromImage"
            },
            "imageReference": {
              "publisher": "[parameters('osImagePublisher')]",
              "offer": "[parameters('osImageOffer')]",
              "sku": "[parameters('osImageSku')]",
              "version": "latest"
            }
          },
          "osProfile": {
            "computerNamePrefix": "[parameters('vmssName')]",
            "adminUsername": "[parameters('adminUsername')]",
            "adminPassword": "[parameters('adminPassword')]"
          },
          "networkProfile": {
            "networkInterfaceConfigurations": [
              {
                "name": "nic",
                "properties": {
                  "primary": "true",
                  "ipConfigurations": [
                    {
                      "name": "ipconfig",
                      "properties": {
                        "subnet": {
                          "id": "[variables('subnetRef')]"
                        },
                        "loadBalancerBackendAddressPools": [
                          {
                            "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/loadBalancers/', variables('loadBalancerName'), '/backendAddressPools/', variables('loadBalancerBackEndName'))]"
                          }
                        ],
                        "loadBalancerInboundNatPools": [
                          {
                            "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/loadBalancers/', variables('loadBalancerName'), '/inboundNatPools/', variables('loadBalancerNatPoolName'))]"
                          }
                        ]
                      }
                    }
                  ]
                }
              }
            ]
          }
        }
      },
      "dependsOn": [
        "[concat('Microsoft.Network/virtualNetworks/', variables('vnetName'))]",
        "[resourceId('Microsoft.Network/loadBalancers', variables('loadBalancerName'))]"
      ]
    }
  ]
}