How to create multiple vm by using powershell

Punitha Keswani 20

Hi Team,

I am creating multiple virtual machine by using powershell script.

I am getting below error. How can I fix this.

New-AzNetworkInterface : Cannot attach a Standard public IP address '/subscriptions/e06136ac-e2b0-4ba9-8b70-a6274295ed26/resourceGroups/Multivm1/providers/Microsoft.Network/publicIPAddresses/PublicIP3' to an IP configuration

'/subscriptions/e06136ac-e2b0-4ba9-8b70-a6274295ed26/resourceGroups/Multivm1/providers/Microsoft.Network/networkInterfaces/NIC3/ipConfigurations/IPConfig3' that has no reference to a subnet.

Accepted answer

akinbade abiola 1,810 Reputation points

2024-05-13T09:01:50.2433333+00:00
Hello Punitha Keswani,

Thanks for your question.

From the error message you provided, it seems that the IP config for your NIC does not have a reference to a subnet

I would recommend the following:

Ensure you have a Subnet defined in the Vnet where the VM will be deployed

Attach the subnet to the nic config. This can be done using https://learn.microsoft.com/en-us/powershell/module/az.network/new-aznetworkinterfaceipconfig?view=azps-11.6.0

You can test and confirm.

Also please see https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/associate-public-ip-address-vm?tabs=azure-portal

Please let me know if you have further questions

You can mark it 'Accept Answer' if this helped.
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1 additional answer

Virender Singh Rawat 67

Hi, please share your script, and will confirm where you are wrong.

Punitha Keswani 20

Hi Virender thanks for your time. I solved the problem but I have some questions in my profile.

I had issues like by automated username and password so I changed it manually.
I thought of creating new disk and associate those disk into my vm but I failed so removed all commands.

How to fix these two issues.

Connect to Azure

Connect-AzAccount 



$resourceGroupName = "Multivm3"

 # Create a new resource group (if it doesn't exist)

 New-AzResourceGroup -Name $resourceGroupName -Location $location

 # Specify VM details

$location = "East US"  # Azure region for VM deployment

$vmSize = "Standard_DS1_v2"  # VM size

$offer = "UbuntuServer"

$sku = "18.04-LTS"

$adminUsername = "adminuser"  # Admin username for the VMs

$adminPassword = ConvertTo-SecureString "karthik@1234" -AsPlainText -Force  # Admin password for the VMs

Loop to create 3 VMs

for ($i = 1; $i -le 3; $i++) {

$vmName = "VM$i"  # VM name

$nicName = "NIC$i"  # NIC name

$ipConfigName = "IPConfig$i"  # IP configuration name

$publicIpName = "PublicIP$i"  # Public IP address name

$diskName = "Disk$i"  # Disk name

$nsgName = "NSG$i"  # Network Security Group name

# Create a new subnet

$subnetName = "Subnet$i"

$subnetAddressPrefix = "10.$i.0.0/24"

# Create a new virtual network

$vnetName = "VNet$i"

$vnet = New-AzVirtualNetwork -ResourceGroupName $resourceGroupName -Location $location -Name $vnetName -AddressPrefix "10.$i.0.0/16" 

# Create a new subnet

$subnet = New-AzVirtualNetworkSubnetConfig -Name $subnetName -AddressPrefix $subnetAddressPrefix

# Add the subnet configuration to the virtual network

$vnet.Subnets.Add($subnet)

# Associate the subnet with the virtual network

$vnet = Set-AzVirtualNetwork -VirtualNetwork $vnet 

# Create a new public IP address

$publicIp = New-AzPublicIpAddress -ResourceGroupName $resourceGroupName -Location $location -Name $publicIpName -AllocationMethod Static 

# Create a new IP configuration

$ipConfig = New-AzNetworkInterfaceIpConfig -Name $ipConfigName -PublicIpAddressId $publicIp.Id -PrivateIpAddressVersion IPv4  -SubnetId $vnet.Subnets[0].Id

# Create a new network security group (NSG)

$nsg = New-AzNetworkSecurityGroup -ResourceGroupName $resourceGroupName -Name $nsgName -Location $location  

# Create a new network interface

$nic = New-AzNetworkInterface -ResourceGroupName $resourceGroupName -Location $location -Name $nicName -IpConfiguration $ipConfig 

# Create a new disk

 #$disk = New-AzDisk -ResourceGroupName $resourceGroupName -DiskName $diskName -Location $location -CreateOption Empty -DiskSizeGB 10 

# Create a new VM configuration

$vmConfig = New-AzVMConfig -VMName $vmName -VMSize $vmSize

# Specify the operating system image

#$vmConfig = Set-AzVMOperatingSystem -VM $vmConfig -Linux -ComputerName $vmName -Credential (New-Object System.Management.Automation.PSCredential ($adminUsername, $adminPassword)) -ProvisionVMAgent -EnableAutoUpdate

$vmConfig = Set-AzVMOperatingSystem -VM $vmConfig -Linux -ComputerName $vmName -Credential (Get-Credential -UserName $adminUsername -Message "Enter your password")

# Specify the Azure VM source image

$vmConfig = Set-AzVMSourceImage -VM $vmConfig -PublisherName "Canonical" -Offer $offer -Skus $sku -Version "latest"

# Add the network interface to the VM configuration

$vmConfig = Add-AzVMNetworkInterface -VM $vmConfig -Id $nic.Id

# Attach the disk to the VM

$vmConfig = Set-AzVMOSDisk -VM $vmConfig -Name $diskName -CreateOption Attach -ManagedDiskId $disk.Id -Windows

# Define network profile for the VM

$networkProfile = New-AzVMNetworkProfile -NetworkInterfacesId @($nic.Id)

# Create the VM with the defined network profile

New-AzVM -ResourceGroupName $resourceGroupName -Location $location -VM $vmConfig  -Verbose

}