Update prereq.azuredeploy.json

Author: PraveenAnil

201-vmss-scale-existing/prereqs/prereq.azuredeploy.json

@@ -16,7 +16,7 @@
         }
     },
     "variables": {
-        "namingInfix": "[toLower(substring(concat('existingvmss', uniqueString(resourceGroup().id)), 0, 16))]",
+        "namingInfix": "existingvmss",
         "virtualNetworkName": "[concat(variables('namingInfix'), 'vnet')]",
         "publicIPAddressName": "[concat(variables('namingInfix'), 'pip')]",
         "subnetName": "[concat(variables('namingInfix'), 'subnet')]",
@@ -93,7 +93,7 @@
             "type": "Microsoft.Compute/virtualMachineScaleSets",
             "name": "existingvmss",
             "location": "[resourceGroup().location]",
-            "apiVersion": "2016-04-30-preview",
+            "apiVersion": "2017-03-30",
             "dependsOn": [
                 "[concat('Microsoft.Network/loadBalancers/', variables('loadBalancerName'))]",
                 "[concat('Microsoft.Network/virtualNetworks/', variables('virtualNetworkName'))]"
@@ -121,7 +121,7 @@
                         }
                     },
                     "osProfile": {
-                        "computerNamePrefix": "[toLower(substring(concat('existingvmss', uniqueString(resourceGroup().id)), 0, 9))]",
+                        "computerNamePrefix": "existvmss",
                         "adminUsername": "[parameters('adminUsername')]",
                         "adminPassword": "[parameters('adminPassword')]"
                     },
@@ -134,13 +134,13 @@
                                     "name": "[concat(variables('namingInfix'), 'ipconfig')]",
                                     "properties": {
                                         "subnet": {
-                                            "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/virtualNetworks/', variables('virtualNetworkName'), '/subnets/', variables('subnetName'))]"
+                                            "id": "[resourceId('Microsoft.Network/virtualNetworks/subnets', variables('virtualNetworkName'), variables('subnetName'))]"
                                         },
                                         "loadBalancerBackendAddressPools": [{
-                                            "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/loadBalancers/', variables('loadBalancerName'), '/backendAddressPools/', variables('bePoolName'))]"
+                                            "id": "[resourceId('Microsoft.Network/loadBalancers/backendAddressPools', variables('loadBalancerName'), variables('bePoolName'))]"
                                         }],
                                         "loadBalancerInboundNatPools": [{
-                                            "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/loadBalancers/', variables('loadBalancerName'), '/inboundNatPools/', variables('natPoolName'))]"
+                                            "id": "[resourceId('Microsoft.Network/loadBalancers/inboundNatPools', variables('loadBalancerName'), variables('natPoolName'))]"
                                         }]
                                     }
                                 }]
@@ -218,4 +218,4 @@
             "value": "existingvmss"
         }
     }
-}
+}