{
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01-preview/deploymentTemplate.json",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "vmSSName": {
      "type": "string",
      "metadata": {
        "description": "Scale Set name, also used in this template as a base for naming resources (hence limited to 9 characters or less)."
      },
      "maxLength": 10
    },
    "instanceCount": {
      "type": "int",
      "metadata": {
        "description": "Number of VM instances"
      },
      "maxValue": 100
    },
    "adminUsername": {
      "type": "string",
      "metadata": {
        "description": "Admin username on all VMs."
      }
    },
    "adminPassword": {
      "type": "securestring",
      "metadata": {
        "description": "Admin password on all VMs."
      }
    }
  },
  "variables": {
    "vmSize": "Standard_D1_v2",
    "virtualNetworkName": "[concat(parameters('vmssName'), 'vnet')]",
    "subnetName": "[concat(parameters('vmssName'), 'subnet')]",
    "nicName": "[concat(parameters('vmssName'), 'nic')]",
    "ipConfigName": "[concat(parameters('vmssName'), 'ipconfig')]",
    "addressPrefix": "10.0.0.0/16",
    "subnetPrefix": "10.0.0.0/24",
    "storageAccountType": "Standard_LRS",
    "location": "[resourceGroup().location]",
    "osType": {
      "publisher": "Canonical",
      "offer": "UbuntuServer",
      "sku": "16.04-LTS",
      "version": "latest"
    },
    "imageReference": "[variables('osType')]",
    "computeApiVersion": "2017-03-30",
    "networkApiVersion": "2017-04-01"
  },
  "resources": [
    {
      "type": "Microsoft.Network/virtualNetworks",
      "name": "[variables('virtualNetworkName')]",
      "location": "[variables('location')]",
      "apiVersion": "[variables('networkApiVersion')]",
      "properties": {
        "addressSpace": {
          "addressPrefixes": [
            "[variables('addressPrefix')]"
          ]
        },
        "subnets": [
          {
            "name": "[variables('subnetName')]",
            "properties": {
              "addressPrefix": "[variables('subnetPrefix')]"
            }
          }
        ]
      }
    },
    {
      "type": "Microsoft.Compute/virtualMachineScaleSets",
      "name": "[parameters('vmssName')]",
      "location": "[variables('location')]",
      "apiVersion": "[variables('computeApiVersion')]",
      "dependsOn": [
        "[concat('Microsoft.Network/virtualNetworks/', variables('virtualNetworkName'))]"
      ],
      "sku": {
        "name": "[variables('vmSize')]",
        "tier": "Standard",
        "capacity": "[parameters('instanceCount')]"
      },
      "properties": {
        "upgradePolicy": {
          "mode": "Manual"
        },
        "virtualMachineProfile": {
          "storageProfile": {
            "osDisk": {
              "caching": "ReadOnly",
              "createOption": "FromImage"
            },
            "imageReference": "[variables('imageReference')]"
          },
          "osProfile": {
            "computerNamePrefix": "[parameters('vmSSName')]",
            "adminUsername": "[parameters('adminUsername')]",
            "adminPassword": "[parameters('adminPassword')]"
          },
          "networkProfile": {
            "networkInterfaceConfigurations": [
              {
                "name": "[variables('nicName')]",
                "properties": {
                  "primary": "true",
                  "ipConfigurations": [
                    {
                      "name": "[variables('ipConfigName')]",
                      "properties": {
                        "subnet": {
                          "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/virtualNetworks/', variables('virtualNetworkName'), '/subnets/', variables('subnetName'))]"
                        }
                      }
                    }
                  ]
                }
              }
            ]
          }
        },
        "overprovision": "true"
      }
    }
  ]
}