Configure a Virtual Machine Scale Set with an existing Azure Standard Load Balancer

Prerequisites

• An Azure subscription.
• An existing standard sku load balancer in the subscription where the Virtual Machine Scale Set will be deployed.
• An Azure Virtual Network for the Virtual Machine Scale Set.

Sign in to the Azure portal

Sign in to the Azure portal.

Deploy Virtual Machine Scale Set with existing load balancer

In this section, you'll create a Virtual Machine Scale Set in the Azure portal with an existing Azure load balancer.

1. On the top left-hand side of the screen, select Create a resource and search for Virtual Machine Scale Set in the marketplace search.

2. Select Virtual machine scale set and Select Create.

3. In Create a virtual machine scale set, enter, or select this information in the Basics tab:

   Setting	Value
   Project details
   Subscription	Select your Azure subscription
   Resource Group	Select Create new, enter myResourceGroup, then select OK, or select an existing resource group.
   Scale set details
   Virtual machine scale set name	Enter myVMSS
   Region	Select China North 3
   Availability zone	Select None
   Instance details
   Image	Select Ubuntu Server 18.04 LTS
   Size	Leave at default
   Administrator account
   Authentication type	Select Password
   Username	Enter your admin username
   Password	Enter your admin password
   Confirm password	Reenter your admin password

   

4. Select the Networking tab.

5. Enter or select this information in the Networking tab:

   Setting	Value
   Virtual Network Configuration
   Virtual network	Select myVNet or your existing virtual network.
   Load balancing
   Use a load balancer	Select Yes
   Load balancing settings
   Load balancing options	Select Azure load balancer
   Select a load balancer	Select myLoadBalancer or your existing load balancer
   Select a backend pool	Select myBackendPool or your existing backend pool.

   

6. Select the Management tab.

7. In the Management tab, set Boot diagnostics to Off.

8. Select the blue Review + create button.

9. Review the settings and select the Create button.

Prerequisites

• An Azure account with an active subscription. Create a trial subscription.

• You need an existing standard sku load balancer in the subscription where the Virtual Machine Scale Set will be deployed.

• You need an Azure Virtual Network for the Virtual Machine Scale Set.

• If you prefer to run CLI reference commands locally, install the Azure CLI. If you're running on Windows or macOS, consider running Azure CLI in a Docker container. For more information, see How to run the Azure CLI in a Docker container.

  • If you're using a local installation, sign in to the Azure CLI by using the az login command. To finish the authentication process, follow the steps displayed in your terminal. For other sign-in options, see Sign in with the Azure CLI.

  • When you're prompted, install the Azure CLI extension on first use. For more information about extensions, see Use extensions with the Azure CLI.

  • Run az version to find the version and dependent libraries that are installed. To upgrade to the latest version, run az upgrade.

• This article requires version 2.0.28 or later of the Azure CLI. If using Azure Poweshell Shell, the latest version is already installed.

Deploy a Virtual Machine Scale Set with existing load balancer

Deploy a Virtual Machine Scale Set with az vmss create. Replace the values in brackets with the names of the resources in your configuration.

az vmss create \
    --resource-group <resource-group> \
    --name <vmss-name>\
    --image <your-image> \
    --admin-username <admin-username> \
    --generate-ssh-keys  \
    --upgrade-policy-mode Automatic \
    --instance-count 3 \
    --vnet-name <virtual-network-name> \
    --subnet <subnet-name> \
    --lb <load-balancer-name> \
    --backend-pool-name <backend-pool-name>

The below example deploys a Virtual Machine Scale Set with:

• Virtual Machine Scale Set named myVMSS
• Azure Load Balancer named myLoadBalancer
• Load balancer backend pool named myBackendPool
• Azure Virtual Network named myVnet
• Subnet named mySubnet
• Resource group named myResourceGroup
• Ubuntu Server image for the Virtual Machine Scale Set

az vmss create \
    --resource-group myResourceGroup \
    --name myVMSS \
    --image Canonical:UbuntuServer:18.04-LTS:latest \
    --admin-username adminuser \
    --generate-ssh-keys \
    --upgrade-policy-mode Automatic \
    --instance-count 3 \
    --vnet-name myVnet\
    --subnet mySubnet \
    --lb myLoadBalancer \
    --backend-pool-name myBackendPool

Prerequisites

• An Azure account with an active subscription. Create a trial subscription.
• An existing resource group for all resources.
• An existing standard sku load balancer in the subscription where the Virtual Machine Scale Set will be deployed.
• An Azure Virtual Network for the Virtual Machine Scale Set.

Sign in to Azure CLI

Sign into Azure with Connect-AzAccount -Environment AzureChinaCloud

Connect-AzAccount -Environment AzureChinaCloud

Deploy a Virtual Machine Scale Set with existing load balancer

Deploy a Virtual Machine Scale Set with New-AzVMss. Replace the values in brackets with the names of the resources in your configuration.

$rsg = <resource-group>
$loc = <location>
$vms = <vm-scale-set-name>
$vnt = <virtual-network>
$sub = <subnet-name>
$lbn = <load-balancer-name>
$pol = <upgrade-policy-mode>
$img = <image-name>
$bep = <backend-pool-name>

$lb = Get-AzLoadBalancer -ResourceGroupName $rsg -Name $lbn

New-AzVmss -ResourceGroupName $rsg -Location $loc -VMScaleSetName $vms -VirtualNetworkName $vnt -SubnetName $sub -LoadBalancerName $lb -UpgradePolicyMode $pol

The below example deploys a Virtual Machine Scale Set with the following values:

• Virtual Machine Scale Set named myVMSS
• Azure Load Balancer named myLoadBalancer
• Load balancer backend pool named myBackendPool
• Azure Virtual Network named myVnet
• Subnet named mySubnet
• Resource group named myResourceGroup

$rsg = "myResourceGroup"
$loc = "China East 2"
$vms = "myVMSS"
$vnt = "myVnet"
$sub = "mySubnet"
$pol = "Automatic"
$lbn = "myLoadBalancer"
$bep = "myBackendPool"

$lb = Get-AzLoadBalancer -ResourceGroupName $rsg -Name $lbn

New-AzVmss -ResourceGroupName $rsg -Location $loc -VMScaleSetName $vms -VirtualNetworkName $vnt -SubnetName $sub -LoadBalancerName $lb -UpgradePolicyMode $pol -BackendPoolName $bep

Next steps

In this article, you deployed a Virtual Machine Scale Set with an existing Azure Load Balancer. To learn more about Virtual Machine Scale Sets and load balancer, see:

• What is Azure Load Balancer?
• What are Virtual Machine Scale Sets?