如何删除特定 VMSS 实例的自定义脚本扩展

Question

我使用以下代码通过 powershell 删除特定 VMSS 实例的自定义脚本扩展。但是，当使用 Get-AzVmssVM 检索实例视图时，我的代码失败，因为实例 ID 是字母数字而不是数字。您能否帮助我获取数字格式的实例 ID

# Input Parameters
$ResourceGroupName = "MyResourceGroup" # Replace with your resource group name
$VMScaleSetName = "MyVMSS"            # Replace with your VMSS name
$ExtensionName = "CustomScriptExtension" # Replace with the name of the extension to remove

# Get all VMSS instances
$instances = Get-AzVmssVM -ResourceGroupName $ResourceGroupName -VMScaleSetName $VMScaleSetName

# Loop through each instance
foreach ($instance in $instances) {
    $InstanceId = $instance.InstanceId # InstanceId is often alphanumeric
    $InstanceName = $instance.Name

    Write-Output "Processing Instance ID: $InstanceId, Instance Name: $InstanceName"

    try {
        # Get the instance view to check extensions
        $instanceView = Get-AzVmssVM -ResourceGroupName $ResourceGroupName -VMScaleSetName $VMScaleSetName -InstanceId $InstanceId -InstanceView
        $extensionExists = $instanceView.Extensions | Where-Object { $_.Name -eq $ExtensionName }

        if ($extensionExists) {
            Write-Output "Removing extension '$ExtensionName' from Instance ID: $InstanceId"
            # Remove the extension
            Remove-AzVmssVMExtension -ResourceGroupName $ResourceGroupName -VMScaleSetName $VMScaleSetName -InstanceId $InstanceId -Name $ExtensionName -Force
            Write-Output "Extension '$ExtensionName' removed successfully from Instance ID: $InstanceId"
        } else {
            Write-Output "Extension '$ExtensionName' not found on Instance ID: $InstanceId"
        }
    } catch {
        Write-Output "Error processing Instance ID: $InstanceId. Details: $_"
    }

    Write-Output "--------------------------------------------"
}

我想使用实例 Id 获取实例视图，但 Get-AzVmssVM 期望数值，但我得到字母数字实例 Id

Answer 1

您尝试删除扩展的命令 Remove-AzVmssVMExtension 无效。正确的 cmdlet 是 Remove-AzVmssExtension。您可以检查

MS Doc

：Remove-AzVmssExtension

在运行脚本之前，我在 VMSS 中有一个

CustomScriptExtension

。

这里是更新后的 PowerShell 脚本，用于删除

CustomScriptExtension

中的

VMSS

。

$RGName = "venkat-rg"
$vmssName= "venkatvmss" 
$vmssExtensionName= "CustomScriptExtension"

# Get all VMSS instances
$instances = Get-AzVmssVM -ResourceGroupName $ResourceGroupName -VMScaleSetName $VMScaleSetName

# Loop through each instance
foreach ($instance in $instances) {
    $InstanceId = $instance.InstanceId # InstanceId is often alphanumeric
    $InstanceName = $instance.Name

    Write-Output "Processing Instance ID: $InstanceId, Instance Name: $InstanceName"

    try {
        # Get the instance view to check extensions
        $instanceView = Get-AzVmssVM -ResourceGroupName $ResourceGroupName -VMScaleSetName $VMScaleSetName -InstanceId $InstanceId -InstanceView
        $extensionExists = $instanceView.Extensions | Where-Object { $_.Name -eq $ExtensionName }

        if ($extensionExists) {
            Write-Output "Removing extension '$ExtensionName' from Instance ID: $InstanceId"
            # Remove the extension
            Remove-AzVmssExtension -VirtualMachineScaleSet $vmss -Name $vmssExtensionName 
            Write-Output "Extension '$ExtensionName' removed successfully from Instance ID: $InstanceId"

            Write-Host "Updating the VMSS to reflect the removal of the extension..."

            Update-AzVmss -ResourceGroupName $RGName -Name $vmssName -VirtualMachineScaleSet $vmss
        } else {
            Write-Output "Extension '$ExtensionName' not found on Instance ID: $InstanceId"
        }
    } catch {
        Write-Output "Error processing Instance ID: $InstanceId. Details: $_"
    }

    Write-Output "--------------------------------------------"
}

输出

运行脚本后，VMSS 中的扩展已被卸载。

参考： 从 VMSS 中删除实例