Question

要获得运行其他脚本的干净环境，每次计划任务触发时，我都需要在ESX主机上还原虚拟机。

恢复可以通过运行：

来实现

Set-VM -VM $VMName -Snapshot "MySnapshot" -Confirm:$false

可以通过运行来实现启动：

Start-VM -VM $VMName

停止可以通过运行：

来实现

Shutdown-VMGuest -VM $VMName -Confirm:$false

如何以更安全的方式处理此问题，例如，在还原，启动或停止VM时能够处理错误，并在成功执行其中一个任务时获得返回？

我使用的是PowerCLI 6.5.0。

Answer 1

您可以使用多种方法来实现此目的。以下是两个例子：

使用-ErrorVariable

# Revert VM
Set-VM -VM $VMName -Snapshot "MySnapshot" -Confirm:$false -ErrorVariable revertError

If ($revertError)
{
    Write-Host "An error occured while reverting snapshot !" -ForegroundColor Red
    Write-Host $revertError
}
Else
{
    Write-Host "Successfully reverted to snapshot." -ForegroundColor Green
}

# Start VM
Start-VM -VM $VMName -ErrorVariable startError

If ($startError)
{
    Write-Host "An error occured while starting VM :" -ForegroundColor Red
    Write-Host $startError
}
Else
{
    Write-Host "Successfully started VM." -ForegroundColor Green
}

# Stop VM
Shutdown-VMGuest -VM $VMName -Confirm:$false -ErrorVariable shutdownError

If ($shutdownError)
{
    Write-Host "An error occured while shutting down guest OS of VM :" -ForegroundColor Red
    Write-Host $shutdownError
}
Else
{
    Write-Host "Successfully stopped VM." -ForegroundColor Green
}

使用@ mark-wragg

提及的Try / Catch

# Revert VM
Try
{
    # Temporarily make all errors terminating
    $errorActionPreference = "Stop"
    Set-VM -VM $VMName -Snapshot "MySnapshot" -Confirm:$false
    Write-Host "Successfully reverted to snapshot." -ForegroundColor Green
}
Catch
{
    Write-Host "An error occured while reverting snapshot !" -ForegroundColor Red
    Write-Host $_.Exception.Message
}
Finally
{
    $errorActionPreference = "Continue"
}

# Start VM
Try
{
    # Temporarily make all errors terminating
    $errorActionPreference = "Stop"
    Start-VM -VM $VMName
    Write-Host "Successfully started VM." -ForegroundColor Green
}
Catch
{
    Write-Host "An error occured while starting VM :" -ForegroundColor Red
    Write-Host $_.Exception.Message
}
Finally
{
    $errorActionPreference = "Continue"
}

# Stop VM
Try
{
    # Temporarily make all errors terminating
    $errorActionPreference = "Stop"
    Shutdown-VMGuest -VM $VMName -Confirm:$false
    Write-Host "Successfully stopped VM." -ForegroundColor Green
}
Catch
{
    Write-Host "An error occured while shutting down guest OS of VM :" -ForegroundColor Red
    Write-Host $_.Exception.Message
}
Finally
{
    $errorActionPreference = "Continue"
}

使用PowerCLI强化自动使用VM的PowerShell脚本

1 个答案: