Creating Availability Sets for Virtual Machines in Azure with PowerShell

Create a Resource Group

$splat = @{
    Name = 'availabilitySet-rg'
    Location = 'CentralUS'
}

New-AzResourceGroup @splat

Create a Managed Availability Set

$splat = @{
    Location = "CentralUS"
    Name = "availabilitySetPractice"
    ResourceGroupName = "availabilitySet-rg"
    Sku = "aligned"
    PlatformFaultDomainCount = 2
    PlatformUpdateDomainCount = 2
}

New-AzAvailabilitySet @splat

Important notes:

SKU aligned means it uses managed disk.
Fault Domain max is 3 (currently & depends on region)
Update Domain max is 20 (currently)
Availability sets are under a 99.95% Azure SLA.

Create Virtual Machines in an Availability Set

$cred = Get-Credential

1..2 | ForEach-Object -Parallel {
    New-AzVm `
        -ResourceGroupName "availabilitySet-rg" `
        -Name "myVM$_" `
        -Location "CentralUS" `
        -VirtualNetworkName "vNet" `
        -SubnetName "Subnet" `
        -SecurityGroupName "NSG" `
        -PublicIpAddressName "publicIpAddress$_" `
        -AvailabilitySetName "availabilitySetPractice" `
        -Credential $using:cred `
}

Delete Resources Clean-up

Remove-AzResourceGroup -Name 'availabilitySet-rg'

Sources

Tutorial: Create and deploy highly available virtual machines with Azure PowerShell

Manage the availability of Windows virtual machines in Azure

Blog

Creating Availability Sets for Virtual Machines in Azure with PowerShell

Josh Duffney

Create a Resource Group

Create a Managed Availability Set

Create Virtual Machines in an Availability Set

Delete Resources Clean-up

Sources

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