PowerShell批量重启脚本报错：如何静默处理不可达主机

要解决不可达主机导致控制台报错的问题，核心是捕获重启阶段的错误并仅记录到日志，同时保留原有验证逻辑。以下是修改后的完整核心代码及说明：

修改后的代码 #

#Actual restart portion (for privacy reasons, real file path replaced with "file-path")
#Starts by moving most recent log to archive folder
Get-ChildItem -Path "\\file-path\Computer Restarts\Logs" -Recurse -File | Move-Item -Destination "\\file-path\Computer Restarts\Logs\Archive" -Force

#Determine script location, create new script, get current time and date
$ScriptDir = Split-Path $script:MyInvocation.MyCommand.Path
$Log = New-Item "\\file-path\Computer Restarts\Logs\$(Get-Date -f yyyy-MM-dd_hh-mm-ss) Restarts.txt" -ItemType File -Force
$Date = Get-Date -Format "dd-MMM-yyyy hh:mm:ss"
$Now = [datetime]::Now

Clear-Host
Write-Host `n `n `n
Write-Host "Rebooting all computers and verifying reboot status..." `n `n
Write-Host "Please standby, process may take up to 30 minutes..." `n `n

# 逐个处理主机重启，捕获错误并记录到日志
foreach ($Computer in $Computers) {
    try {
        # 尝试重启主机，-ErrorAction Stop确保所有错误进入catch块
        Restart-Computer -ComputerName $Computer -Wait -For PowerShell -Delay 2 -Force -Timeout 1800 -ErrorAction Stop
        Add-Content -Path $Log -Value "$Computer`: 重启命令已执行，等待验证状态..."
    }
    catch {
        # 记录重启失败的错误信息，控制台不输出错误
        Add-Content -Path $Log -Value "$Computer`: 重启失败 - $($_.Exception.Message)"
    }
}

"----------------------------------Script executed on $Date----------------------------------" + "`r`n" | Out-File $Log -Append #First thing added to new log

foreach($Computer in $Computers) #Checks each server to see if it has rebooted. Waits for confirmation before moving to next computer, skips computer if unresponsive after short time.
{
    $LastBoot = (Get-CimInstance Win32_OperatingSystem -ComputerName $Computer -EA 0).LastBootUpTime
    $PingRequest = Test-Connection -ComputerName $Computer -Count 1 -Quiet

    if(($PingRequest -eq $true) -and ($LastBoot -gt $Now))
    {
        Add-Content -Path $Log -Value "$Computer`: Reboot Successful."
    }
    elseif ($PingRequest -eq $false)
    {
        Add-Content -Path $Log -Value "$Computer`: Computer not detected, please confirm."
    }
    else
    {
        Add-Content -Path $Log -Value "$Computer`: Restart not detected, please restart computer manually. Last detected boot up time is $LastBoot"
    }
}

关键修改说明 #

1. 逐个处理主机重启：将原批量重启改为循环遍历每个主机，单独捕获每台机器的重启错误，避免一台失败导致整批报错。
2. 错误捕获与日志记录：用try/catch包裹Restart-Computer调用，并设置-ErrorAction Stop，确保所有错误（包括主机不可达、权限问题等）进入catch块，将错误信息写入日志，控制台不再显示错误。
3. 保留原有验证逻辑：后续的重启状态验证逻辑保持不变，确保每台主机的最终状态都能被正确记录。

如果仍希望保持批量重启的效率，可将重启命令改为：

Restart-Computer -ComputerName $Computers -Wait -For PowerShell -Delay 2 -Force -Timeout 1800 -ErrorAction SilentlyContinue

但这种方式无法单独记录每台主机的重启失败原因，只能在后续验证阶段通过Ping或LastBoot时间判断状态，因此更推荐逐个处理的方案。

内容的提问来源于stack exchange，提问作者RustyAndroid