PowerShell服务 - 输出读取不正确

时间：2016-01-13 17:27:25

标签： powershell logging service output

尝试编写执行以下操作的PowerShell脚本：

  1. 寻找服务存在
  2. 如果找到，请检查服务状态
  3. 报告服务状态
  4. 如果服务状态未运行，则启动服务
  5. 报告服务状态

    6. 问题： 如果我运行一次脚本，最终的服务状态将显示正在运行，但之前打印的消息将是无法启动服务。如果我再次运行脚本，它将翻转并说服务已经启动，但最终状态已停止。

    当前代码： 

    # Setting variables

$date = Get-Date # setting date
$LogFile = "$env:UserProfile\Desktop\Log.txt" # setting log file - change as needed
$ServiceName = "Spooler" # setting service name - change as needed
$arrService = Get-Service -Name $ServiceName
$arrServiceCheck = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue -ErrorVariable NoService


<# =============== DO NOT CHANGE ANYTHING BELOW THIS POINT =============== #>

# Creating functions for re-use throughout script

function CurrentServiceStatus {
    Write-Output "Status of '$ServiceName' service:" | Out-File $LogFile -append
    Get-Service $ServiceName | Select Name,DisplayName,Status | Format-List | Out-File $LogFile -append
}

# Starting script operation

Write-Output "=========================================================================" | Out-File $LogFile
Write-Output "    Starting '$ServiceName' Service Monitor Script on $date" | Out-File $LogFile -append
Write-Output "=========================================================================" | Out-File $LogFile -append
Write-Output " " | Out-File $LogFile -append

# Looking for service. If service was found, checking it's status. If status is not running, starting the service.

if ($arrServiceCheck){
    Write-Output "'$ServiceName' service found on $env:ComputerName..." | Out-File $LogFile -append
    Write-Output " " | Out-File $LogFile -append

    ServiceStatus

    if ($arrService.Status -ne "Running"){
        Start-Service $ServiceName | Out-File $LogFile -append
    }

    if ($arrService.Status -eq "Running"){
        Write-Output "$date - '$ServiceName' started..." | Out-File $LogFile -append
        Write-Output " " | Out-File $LogFile -append
        ServiceStatus
    }
    else{
        Write-Output "Error: '$ServiceName' service could not be started..." | Out-File $LogFile -append
        Write-Output " " | Out-File $LogFile -append
        ServiceStatus
    }
}

# If service was not found, making note of it to log file

if ($NoService){
    Write-Output " " | Out-File $LogFile -append
Write-Output $NoService[0].exception.message | Out-File $LogFile -append
    Write-Output " " | Out-File $LogFile -append
}

# Completing running of script

Write-Output "=========================================================================" | Out-File $LogFile -append
Write-Output "    Finished '$ServiceName' Service Monitor Script on $date" | Out-File $LogFile -append
Write-Output "=========================================================================" | Out-File $LogFile -append
Write-Output " " | Out-File $LogFile -append
Write-Output " " | Out-File $LogFile -append

    这是我的输出......

    运行1： 

    =========================================================================
    Starting 'Spooler' Service Monitor Script on 01/13/2016 12:06:49
=========================================================================

'Spooler' service found on MW762OXI5K7M8D...

Current status of 'Spooler' service:


Name        : Spooler
DisplayName : Print Spooler
Status      : Stopped



01/13/2016 12:06:49 - 'Spooler' started...

Final status of 'Spooler' service:


Name        : Spooler
DisplayName : Print Spooler
Status      : Stopped



=========================================================================
    Finished 'Spooler' Service Monitor Script on 01/13/2016 12:06:49
=========================================================================

    运行2： 

    =========================================================================
    Starting 'Spooler' Service Monitor Script on 01/13/2016 12:15:58
=========================================================================

'Spooler' service found on MW762OXI5K7M8D...

Current status of 'Spooler' service:


Name        : Spooler
DisplayName : Print Spooler
Status      : Stopped



'Spooler' service could not be started...

Final status of 'Spooler' service:


Name        : Spooler
DisplayName : Print Spooler
Status      : Running



=========================================================================
    Finished 'Spooler' Service Monitor Script on 01/13/2016 12:15:58
=========================================================================

    ==========================================

    以下是更正后的代码： 

    # Setting variables

$date = Get-Date # setting date
$LogFile = "$env:UserProfile\Desktop\NXLogMonitor\Logging\NXLogMonitor.txt"    # setting log file - change as needed
$ServiceName = "Spooler" # setting service name - change as needed
$arrService = Get-Service -Name $ServiceName
$arrServiceCheck = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue -ErrorVariable NoService


<# =============== DO NOT CHANGE ANYTHING BELOW THIS POINT =============== #>

# Creating functions for re-use throughout script

function ServiceStatus {
    Write-Output "Status of '$ServiceName' service:" | Out-File $LogFile -append
    Get-Service $ServiceName | Select Name,DisplayName,Status | Format-Table -AutoSize | Out-File $LogFile -append
}

# Starting script operation

Write-Output "=========================================================================" | Out-File $LogFile
Write-Output "    Starting '$ServiceName' Service Monitor Script on $date" | Out-File $LogFile -append
Write-Output "=========================================================================" | Out-File $LogFile -append
Write-Output " " | Out-File $LogFile -append

# Looking for service. If service was found, checking it's status. If status is not running, starting the service.

if ($arrServiceCheck){
    Write-Output "'$ServiceName' service found on $env:ComputerName..." | Out-File $LogFile -append
    Write-Output " " | Out-File $LogFile -append

    if ($arrService.Status -eq "Running"){
        Write-Output "'$ServiceName' is already started..." | Out-File $LogFile -append
        Write-Output " " | Out-File $LogFile -append
        ServiceStatus
    }

    if ($arrService.Status -ne "Running"){
        Write-Output "'$ServiceName' service is not started..." | Out-File $LogFile -append
        Write-Output " " | Out-File $LogFile -append

        ServiceStatus

        $arrService = Start-Service $ServiceName -PassThru
        if ($arrService.Status -eq "Running"){
            Write-Output "$date - '$ServiceName' service started..." | Out-File $LogFile -append
            Write-Output " " | Out-File $LogFile -append
            ServiceStatus
        }
        elseif ($arrService.Status -ne "Running"){
            Write-Output "Error: '$ServiceName' service could not be started..." | Out-File $LogFile -append
            Write-Output " " | Out-File $LogFile -append
            ServiceStatus
        }
    }
}

# If service was not found, making note of it to log file

if ($NoService){
    Write-Output " " | Out-File $LogFile -append
Write-Output $NoService[0].exception.message | Out-File $LogFile -append
    Write-Output " " | Out-File $LogFile -append
}

# Completing running of script

Write-Output "=========================================================================" | Out-File $LogFile -append
Write-Output "    Finished '$ServiceName' Service Monitor Script on $date" | Out-File $LogFile -append
Write-Output "=========================================================================" | Out-File $LogFile -append
Write-Output " " | Out-File $LogFile -append
Write-Output " " | Out-File $LogFile -append

    以下是更正后代码的输出： 

    =========================================================================
    Starting 'Spooler' Service Monitor Script on 01/13/2016 13:53:08
=========================================================================

'Spooler' service found on MW762OXI5K7M8D...

'Spooler' is already started...

Status of 'Spooler' service:

Name    DisplayName    Status
----    -----------    ------
Spooler Print Spooler Running


=========================================================================
    Finished 'Spooler' Service Monitor Script on 01/13/2016 13:53:08
=========================================================================

2 个答案:

答案 0 :(得分：2)

仔细看看你刚开始做的事情：

$arrService = Get-Service -Name $ServiceName

$arrService.Status现在反映了之前服务的状态 - 让我们想象状态是Stopped

然后，在您的脚本中稍后：

if ($arrService.Status -ne "Running"){
    Start-Service $ServiceName | Out-File $LogFile -append
}

此部分按预期工作 - 启动脚本时服务未运行，因此它现在就开始了，太棒了！

然后是你脚本中有问题的部分：

if ($arrService.Status -eq "Running"){
       Write-Output "$date - '$ServiceName' started..." | Out-File $LogFile -append
       Write-Output " " | Out-File $LogFile -append
       FinalServiceStatus
}
else{
    Write-Output "Error: '$ServiceName' service could not be started..." | Out-File $LogFile -append
    Write-Output " " | Out-File $LogFile -append
    FinalServiceStatus
}

由于$arrService.Status 仍然具有与之前完全相同的值（即使服务本身现在可能已将其状态更改为Running），else无论服务是否成功启动，都会执行块。

您需要再次致电Get-Service 以获取服务的新价值，或者（我个人最喜欢的）使用Start-Service -PassThru来“更新”{{1}变量：

$arrService

答案 1 :(得分：0)

对于任何有兴趣的人，根据Mathias的建议，这就是我的代码最终看起来的样子（就逻辑而言）：

if ($arrServiceCheck){
    Write-Output "'$ServiceName' service found on $env:ComputerName..." | Out-File $LogFile -append
    Write-Output " " | Out-File $LogFile -append

    if ($arrService.Status -eq "Running"){
           Write-Output "'$ServiceName' is already started..." | Out-File $LogFile -append
           Write-Output " " | Out-File $LogFile -append
           FinalServiceStatus
}

    if ($arrService.Status -ne "Running"){
        CurrentServiceStatus
        $arrService = Start-Service $ServiceName -PassThru
        if ($arrService.Status -eq "Running"){
           Write-Output "$date - '$ServiceName' started..." | Out-File $LogFile -append
           Write-Output " " | Out-File $LogFile -append
           FinalServiceStatus
        }
        elseif ($arrService.Status -ne "Running"){
           Write-Output "Error: '$ServiceName' service could not be started..." | Out-File $LogFile -append
           Write-Output " " | Out-File $LogFile -append
           FinalServiceStatus
        }
    }
}
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