Add VM scaleset with autoscaling example

docs/examples/201/vmss-windows-autoscale/main.bicep

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+param vmSku string {
+  default: 'Standard_A1_v2'
+}
+param windowsOSVersion string {
+  default: '2019-Datacenter'
+  allowed: [
+    '2019-Datacenter'
+    '2016-Datacenter'
+    '2012-R2-Datacenter'
+    '2012-Datacenter'
+  ]
+}
+param vmssName string {
+  maxLength: 61
+}
+param instanceCount int {
+  maxValue: 100
+  minValue: 1
+}
+param adminUsername string
+param adminPassword string {
+  secure: true
+}
+param location string = resourceGroup().location
+
+var namingInfix = toLower(substring(concat(vmssName, uniqueString(resourceGroup().id)), 0, 9))
+var longNamingInfix = toLower(vmssName)
+var addressPrefix = '10.0.0.0/16'
+var subnetPrefix = '10.0.0.0/24'
+var virtualNetworkName = '${namingInfix}vnet'
+var publicIPAddressName = '${namingInfix}pip'
+var subnetName = '${namingInfix}subnet'
+var loadBalancerName = '${namingInfix}lb'
+var natPoolName = '${namingInfix}natpool'
+var bePoolName = '${namingInfix}bepool'
+var natStartPort = 50000
+var natEndPort = 50119
+var natBackendPort = 3389
+var nicname = '${namingInfix}nic'
+var ipConfigName = '${namingInfix}ipconfig'
+var osType = {
+  publisher: 'MicrosoftWindowsServer'
+  offer: 'WindowsServer'
+  sku: windowsOSVersion
+  version: 'latest'
+}
+var imageReference = osType
+
+resource virtualNetwork 'Microsoft.Network/virtualnetworks@2015-05-01-preview' = {
+  name: virtualNetworkName
+  location: location
+  properties: {
+    addressSpace: {
+      addressPrefixes: [
+        addressPrefix
+      ]
+    }
+    subnets: [
+      {
+        name: subnetName
+        properties: {
+          addressPrefix: subnetPrefix
+        }
+      }
+    ]
+  }
+}
+
+resource publicIP 'Microsoft.Network/publicIPAddresses@2020-06-01' = {
+  name: publicIPAddressName
+  location: location
+  properties: {
+    publicIPAllocationMethod: 'Dynamic'
+    dnsSettings: {
+      domainNameLabel: longNamingInfix
+    }
+  }
+}
+
+resource loadBalancer 'Microsoft.Network/loadBalancers@2020-06-01' = {
+  name: loadBalancerName
+  location: location
+  properties: {
+    frontendIPConfigurations: [
+      {
+        name: 'LoadBalancerFrontEnd'
+        properties: {
+          publicIPAddress: {
+            id: publicIP.id
+          }
+        }
+      }
+    ]
+    backendAddressPools: [
+      {
+        name: bePoolName
+      }
+    ]
+    inboundNatPools: [
+      {
+        name: natPoolName
+        properties: {
+          frontendIPConfiguration: {
+            id: resourceId('Microsoft.Network/loadBalancers/frontendIPConfigurations', loadBalancerName, 'loadBalancerFrontEnd')
+          }
+          protocol: 'Tcp'
+          frontendPortRangeStart: natStartPort
+          frontendPortRangeEnd: natEndPort
+          backendPort: natBackendPort
+        }
+      }
+    ]
+  }
+}
+
+resource vmss 'Microsoft.Compute/virtualMachineScaleSets@2020-06-01' = {
+  name: vmssName
+  location: location
+  sku: {
+    name: vmSku
+    tier: 'Standard'
+    capacity: instanceCount
+  }
+  properties: {
+    overprovision: true
+    upgradePolicy: {
+      mode: 'Manual'
+    }
+    virtualMachineProfile: {
+      storageProfile: {
+        osDisk: {
+          createOption: 'FromImage'
+          caching: 'ReadWrite'
+        }
+        imageReference: imageReference
+      }
+      osProfile: {
+        computerNamePrefix: namingInfix
+        adminUsername: adminUsername
+        adminPassword: adminPassword
+      }
+      networkProfile: {
+        networkInterfaceConfigurations: [
+          {
+            name: nicname
+            properties: {
+              primary: true
+              ipConfigurations: [
+                {
+                  name: ipConfigName
+                  properties: {
+                    subnet: {
+                      id: '${virtualNetwork.id}/subnets/${subnetName}'
+                    }
+                    loadBalancerBackendAddressPools: [
+                      {
+                        id: '${loadBalancer.id}/backendAddressPools/${bePoolName}'
+                      }
+                    ]
+                    loadBalancerInboundNatPools: [
+                      {
+                        id: '${loadBalancer.id}/inboundNatPools/${natPoolName}'
+                      }
+                    ]
+                  }
+                }
+              ]
+            }
+          }
+        ]
+      }
+    }
+  }
+}
+
+resource autoScaleSettings 'microsoft.insights/autoscalesettings@2015-04-01' = {
+  name: 'cpuautoscale'
+  location: location
+  properties: {
+    name: 'cpuautoscale'
+    targetResourceUri: vmss.id
+    enabled: true
+    profiles: [
+      {
+        name: 'Profile1'
+        capacity: {
+          minimum: '1'
+          maximum: '10'
+          default: '1'
+        }
+        rules: [
+          {
+            metricTrigger: {
+              metricName: 'Percentage CPU'
+              metricNamespace: ''
+              metricResourceUri: vmss.id
+              timeGrain: 'PT1M'
+              timeWindow: 'PT5M'
+              timeAggregation: 'Average'
+              operator: 'GreaterThan'
+              threshold: 50
+              statistic: 'Average'
+            }
+            scaleAction: {
+              direction: 'Increase'
+              type: 'ChangeCount'
+              value: '1'
+              cooldown: 'PT5M'
+            }
+          }
+          {
+            metricTrigger: {
+              metricName: 'Percentage CPU'
+              metricNamespace: ''
+              metricResourceUri: vmss.id
+              timeGrain: 'PT1M'
+              timeWindow: 'PT5M'
+              timeAggregation: 'Average'
+              operator: 'LessThan'
+              threshold: 30
+              statistic: 'Average'
+            }
+            scaleAction: {
+              direction: 'Decrease'
+              type: 'ChangeCount'
+              value: '1'
+              cooldown: 'PT5M'
+            }
+          }
+        ]
+      }
+    ]
+  }
+}