Deploy-Bastion.ps1
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function Deploy-Bastion { param ([string] $AzureRunAsConnection, [string] $ResourceGroupName, [string] $Name, [string] $pip, [string] $vnet, [string]$sku) Connect-AzAccount -Identity Write-Output ('AzureRunAsConnection: {0} ResourceGroupName: {1} Name: {2} PIP: {3} VNET: {4} SKU: {5}' -F $AzureRunAsConnection, $ResourceGroupName, $Name, $pip, $vnet, $SKU) # $servicePrincipalConnection = Get-AutomationConnection -Name $AzureRunAsConnection # $azAccount = Add-AzAccount -ServicePrincipal -SubscriptionId $servicePrincipalConnection.SubscriptionId -TenantId $servicePrincipalConnection.TenantId -ApplicationId $servicePrincipalConnection.ApplicationId -CertificateThumbprint $servicePrincipalConnection.CertificateThumbprint # preReqs checking # Fetch the VNET configuration try { $rgLocation = (Get-AzResourceGroup -Name $ResourceGroupName).location if (!$rgLocation) { throw ( $_.Exception) } $publicip = Get-AzPublicIpAddress -Name $pip -ResourceGroupName $ResourceGroupName if (!$publicip) { throw ( $_.Exception) Write-Output ('PublicIP: {0} in ResourceGroupName: {1} dosenot exist, Creating new for mapping' -F $PIP, $ResourceGroupName) $publicip = New-AzPublicIpAddress -ResourceGroupName $ResourceGroupName -Name $PIP -Location $rgLocation -AllocationMethod Static -Sku Standard Zone = {} } $VNetDetails = Get-AzVirtualNetwork -Name $vnet -ResourceGroupName $ResourceGroupName #Fetch the SubnetConfig from the VNETConfig $VnetSubnetConfig = Get-AzVirtualNetworkSubnetConfig -Name 'AzureBastionSubnet' -VirtualNetwork $VNetDetails -ErrorAction SilentlyContinue if (!$VNetDetails) { Write-Output ("Missing [AzureBastionSubnet], Check if it exist in VNET : {0}" -F $VNET) throw ( $_.Exception) } if (!$VnetSubnetConfig) { throw ( $_.Exception) # $addressPrefix = ((Get-AzVirtualNetwork -Name $VNET -ResourceGroupName $ResourceGroupName | Select-Object -First 1 # ).subnets.Addressprefix).split('/')[0] # $octets = $addressPrefix.Split('.') # or $octets = $addressPrefix -split "\." # $octets[2] = [string]([int]$octets[2] + 1) # or other manipulation of the third octet # $newAddressPrefix = $octets -join '.' # $newAddressPrefix # Write-Output ('Missing [AzureBastionSubnet] Subnet for RG: {0}. Creating one for Bastion {1} using address prefix {2}/29 ' -F $ResourceGroupName, $Name, $addressPrefix) # ('Creating AzureBastionSubnet subnet...') # $AzureBastionSubnet = Add-AzVirtualNetworkSubnetConfig -Name 'AzureBastionSubnet' -VirtualNetwork $VNetDetails -AddressPrefix "$($newAddressPrefix)/29" # $AzureBastionSubnet = $VNetDetails | Set-AzVirtualNetwork # $AzureBastionSubnet } #Fetch the IPUsage from the SubnetID. $PrivateIPUsage = Get-AzVirtualNetworkUsageList -ResourceGroupName $ResourceGroupName -Name $vnet | Where-Object ID -EQ $VnetSubnetConfig.id [int] $TotalIPLimit = $PrivateIPUsage.Limit [int] $TotalIPUsed = $PrivateIPUsage.CurrentValue if ($TotalIPUsed -lt $TotalIPLimit) { Write-Output ("Private IP's are available in this Subnet [AzureBastionSubnet] for Usage.") } else { throw "Private IP's are not available in [AzureBastionSubnet] Subnet for Usage." } } catch { Write-Output 'Resource not found ' $_ } # Considering VNET and PIP in the same RG Write-Output ("Creating bastion {0} in ResourceGroupName: {1} with PIP: {2} and VNET: {3} pricing tier {4}" -F $Name, $ResourceGroupName, $pip, $vnet, $SKU) New-AzBastion -ResourceGroupName $ResourceGroupName -Name $Name -PublicIpAddressRgName $ResourceGroupName -PublicIpAddressName $pip -VirtualNetworkRgName $ResourceGroupName -VirtualNetworkName $vnet -Sku $SKU -ErrorAction Stop Write-Output ('Resource "{0}" successfully deployed' -F $Name) } |