Create an application gateway with TLS termination using Azure PowerShell
You can use Azure PowerShell to create an application gateway with a certificate for TLS/SSL termination that uses a virtual machine scale set for backend servers. In this example, the scale set contains two virtual machine instances that are added to the default backend pool of the application gateway.
In this article, you learn how to:
- Create a self-signed certificate
- Set up a network
- Create an application gateway with the certificate
- Create a virtual machine scale set with the default backend pool
If you don't have an Azure subscription, create a free account before you begin.
Note
We recommend that you use the Azure Az PowerShell module to interact with Azure. To get started, see Install Azure PowerShell. To learn how to migrate to the Az PowerShell module, see Migrate Azure PowerShell from AzureRM to Az.
This article requires the Azure PowerShell module version 1.0.0 or later. Run Get-Module -ListAvailable Az to find the version. If you need to upgrade, see Install Azure PowerShell module. If you're running PowerShell locally, you also need to run Login-AzAccount to create a connection with Azure.
Create a self-signed certificate
For production use, you should import a valid certificate signed by trusted provider. For this article, you create a self-signed certificate using New-SelfSignedCertificate. You can use Export-PfxCertificate with the Thumbprint that was returned to export a pfx file from the certificate.
New-SelfSignedCertificate `
-certstorelocation cert:\localmachine\my `
-dnsname www.contoso.com
You should see something like this result:
PSParentPath: Microsoft.PowerShell.Security\Certificate::LocalMachine\my
Thumbprint Subject
---------- -------
E1E81C23B3AD33F9B4D1717B20AB65DBB91AC630 CN=www.contoso.com
Use the thumbprint to create the pfx file:
$pwd = ConvertTo-SecureString -String "Azure123456!" -Force -AsPlainText
Export-PfxCertificate `
-cert cert:\localMachine\my\E1E81C23B3AD33F9B4D1717B20AB65DBB91AC630 `
-FilePath c:\appgwcert.pfx `
-Password $pwd
Create a resource group
A resource group is a logical container into which Azure resources are deployed and managed. Create an Azure resource group named myResourceGroupAG with New-AzResourceGroup.
New-AzResourceGroup -Name myResourceGroupAG -Location eastus
Create network resources
Configure the subnets named myBackendSubnet and myAGSubnet using New-AzVirtualNetworkSubnetConfig. Create the virtual network named myVNet using New-AzVirtualNetwork with the subnet configurations. And finally, create the public IP address named myAGPublicIPAddress using New-AzPublicIpAddress. These resources are used to provide network connectivity to the application gateway and its associated resources.
$backendSubnetConfig = New-AzVirtualNetworkSubnetConfig `
-Name myBackendSubnet `
-AddressPrefix 10.0.1.0/24
$agSubnetConfig = New-AzVirtualNetworkSubnetConfig `
-Name myAGSubnet `
-AddressPrefix 10.0.2.0/24
$vnet = New-AzVirtualNetwork `
-ResourceGroupName myResourceGroupAG `
-Location eastus `
-Name myVNet `
-AddressPrefix 10.0.0.0/16 `
-Subnet $backendSubnetConfig, $agSubnetConfig
$pip = New-AzPublicIpAddress `
-ResourceGroupName myResourceGroupAG `
-Location eastus `
-Name myAGPublicIPAddress `
-AllocationMethod Static `
-Sku Standard
Create an application gateway
Create the IP configurations and frontend port
Associate myAGSubnet that you previously created to the application gateway using New-AzApplicationGatewayIPConfiguration. Assign myAGPublicIPAddress to the application gateway using New-AzApplicationGatewayFrontendIPConfig.
$vnet = Get-AzVirtualNetwork `
-ResourceGroupName myResourceGroupAG `
-Name myVNet
$subnet=$vnet.Subnets[0]
$gipconfig = New-AzApplicationGatewayIPConfiguration `
-Name myAGIPConfig `
-Subnet $subnet
$fipconfig = New-AzApplicationGatewayFrontendIPConfig `
-Name myAGFrontendIPConfig `
-PublicIPAddress $pip
$frontendport = New-AzApplicationGatewayFrontendPort `
-Name myFrontendPort `
-Port 443
Create the backend pool and settings
Create the backend pool named appGatewayBackendPool for the application gateway using New-AzApplicationGatewayBackendAddressPool. Configure the settings for the backend pool using New-AzApplicationGatewayBackendHttpSettings.
$defaultPool = New-AzApplicationGatewayBackendAddressPool `
-Name appGatewayBackendPool
$poolSettings = New-AzApplicationGatewayBackendHttpSettings `
-Name myPoolSettings `
-Port 80 `
-Protocol Http `
-CookieBasedAffinity Enabled `
-RequestTimeout 120
Create the default listener and rule
A listener is required to enable the application gateway to route traffic appropriately to the backend pool. In this example, you create a basic listener that listens for HTTPS traffic at the root URL.
Create a certificate object using New-AzApplicationGatewaySslCertificate and then create a listener named mydefaultListener using New-AzApplicationGatewayHttpListener with the frontend configuration, frontend port, and certificate that you previously created. A rule is required for the listener to know which backend pool to use for incoming traffic. Create a basic rule named rule1 using New-AzApplicationGatewayRequestRoutingRule.
$pwd = ConvertTo-SecureString `
-String "Azure123456!" `
-Force `
-AsPlainText
$cert = New-AzApplicationGatewaySslCertificate `
-Name "appgwcert" `
-CertificateFile "c:\appgwcert.pfx" `
-Password $pwd
$defaultlistener = New-AzApplicationGatewayHttpListener `
-Name mydefaultListener `
-Protocol Https `
-FrontendIPConfiguration $fipconfig `
-FrontendPort $frontendport `
-SslCertificate $cert
$frontendRule = New-AzApplicationGatewayRequestRoutingRule `
-Name rule1 `
-RuleType Basic `
-HttpListener $defaultlistener `
-BackendAddressPool $defaultPool `
-BackendHttpSettings $poolSettings `
-priority 100
Create the application gateway with the certificate
Now that you created the necessary supporting resources, specify parameters for the application gateway named myAppGateway using New-AzApplicationGatewaySku, and then create it using New-AzApplicationGateway with the certificate.
Create the application gateway
$sku = New-AzApplicationGatewaySku `
-Name Standard_v2 `
-Tier Standard_v2 `
-Capacity 2
$appgw = New-AzApplicationGateway `
-Name myAppGateway `
-ResourceGroupName myResourceGroupAG `
-Location eastus `
-BackendAddressPools $defaultPool `
-BackendHttpSettingsCollection $poolSettings `
-FrontendIpConfigurations $fipconfig `
-GatewayIpConfigurations $gipconfig `
-FrontendPorts $frontendport `
-HttpListeners $defaultlistener `
-RequestRoutingRules $frontendRule `
-Sku $sku `
-SslCertificates $cert
Create a virtual machine scale set
In this example, you create a virtual machine scale set to provide servers for the backend pool in the application gateway. You assign the scale set to the backend pool when you configure the IP settings.
$vnet = Get-AzVirtualNetwork `
-ResourceGroupName myResourceGroupAG `
-Name myVNet
$appgw = Get-AzApplicationGateway `
-ResourceGroupName myResourceGroupAG `
-Name myAppGateway
$backendPool = Get-AzApplicationGatewayBackendAddressPool `
-Name appGatewayBackendPool `
-ApplicationGateway $appgw
$ipConfig = New-AzVmssIpConfig `
-Name myVmssIPConfig `
-SubnetId $vnet.Subnets[1].Id `
-ApplicationGatewayBackendAddressPoolsId $backendPool.Id
$vmssConfig = New-AzVmssConfig `
-Location eastus `
-SkuCapacity 2 `
-SkuName Standard_DS2 `
-UpgradePolicyMode Automatic
Set-AzVmssStorageProfile $vmssConfig `
-ImageReferencePublisher MicrosoftWindowsServer `
-ImageReferenceOffer WindowsServer `
-ImageReferenceSku 2016-Datacenter `
-ImageReferenceVersion latest `
-OsDiskCreateOption FromImage
Set-AzVmssOsProfile $vmssConfig `
-AdminUsername azureuser `
-AdminPassword "Azure123456!" `
-ComputerNamePrefix myvmss
Add-AzVmssNetworkInterfaceConfiguration `
-VirtualMachineScaleSet $vmssConfig `
-Name myVmssNetConfig `
-Primary $true `
-IPConfiguration $ipConfig
New-AzVmss `
-ResourceGroupName myResourceGroupAG `
-Name myvmss `
-VirtualMachineScaleSet $vmssConfig
Install IIS
$publicSettings = @{ "fileUris" = (,"https://raw.githubusercontent.com/Azure/azure-docs-powershell-samples/master/application-gateway/iis/appgatewayurl.ps1");
"commandToExecute" = "powershell -ExecutionPolicy Unrestricted -File appgatewayurl.ps1" }
$vmss = Get-AzVmss -ResourceGroupName myResourceGroupAG -VMScaleSetName myvmss
Add-AzVmssExtension -VirtualMachineScaleSet $vmss `
-Name "customScript" `
-Publisher "Microsoft.Compute" `
-Type "CustomScriptExtension" `
-TypeHandlerVersion 1.8 `
-Setting $publicSettings
Update-AzVmss `
-ResourceGroupName myResourceGroupAG `
-Name myvmss `
-VirtualMachineScaleSet $vmss
Test the application gateway
You can use Get-AzPublicIPAddress to get the public IP address of the application gateway. Copy the public IP address, and then paste it into the address bar of your browser.
Get-AzPublicIPAddress -ResourceGroupName myResourceGroupAG -Name myAGPublicIPAddress
To accept the security warning if you used a self-signed certificate, select Details and then Go on to the webpage. Your secured IIS website is then displayed as in the following example:
Clean up resources
When no longer needed, remove the resource group, application gateway, and all related resources using Remove-AzResourceGroup.
Remove-AzResourceGroup -Name myResourceGroupAG