强化PowerShell脚本，用于使用PowerCLI自动使用虚拟机

问题描述：

为了让一个干净的环境运行一些其他脚本，每当计划任务触发它时，我需要在ESX主机上还原虚拟机。强化PowerShell脚本，用于使用PowerCLI自动使用虚拟机

复归可以通过运行来实现：可以实现

Start-VM -VM $VMName

雪夜运行：

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

启动可以通过运行来实现

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

我该如何处理这以一种更安全的方式，例如能够在恢复，启动或停止虚拟机并获得时处理错误如果这些任务之一正在成功执行，则返回？

我正在使用PowerCLI 6.5.0。

作为mentionned看看概念'Try..Catch'如果你以前没有。我在这里写了一篇关于它的博客文章：http://wragg.io/powershell-try-catch/ –

答

您可以使用几种方法来实现此目的。这里有两个例子：

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try/catch语句通过@标记wragg

# 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" 
}

强化PowerShell脚本，用于使用PowerCLI自动使用虚拟机

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