PowerShell脚本即服务

Question

我已经创建了一个脚本，希望将其作为服务运行。它使用Invoke-RestMethod来监视服务器上的应用程序，当它检测到不需要的条件时，它会重新启动应用程序。当我使用我的用户帐户运行它时，它工作得很好，但当我将它作为服务(作为系统)运行时，什么也没有发生。我将大多数控制台输出输出到一个变量，然后在循环结束时，将变量的内容作为临时日志写入文件。这个文件永远不会被写入。

我使用this guide创建了这个服务，它似乎启动正常并运行……只是什么都没有发生。

下面是我正在使用的脚本，服务应该执行该脚本。

#Configuration Options
$ESHost = ""
$ESPort = 9200
$ESPro = ""
$ESAPI = ""
$ESAPI.Cred = ""
$LogRoot = ""
$LSHost = ""
$LSPort = 9600
$LSPro = ""
$SMTP = @{
  server = ""
  to = ""
  from = ""
  port = 25
}

#Look for Logstash service
While (Get-Service Logstash) {
  $Date = Get-Date -Format "MMddyyyy_HHmmss"
  #Verify service is running
  if ((Get-Service Logstash).Status -eq "Running") {
    $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  *****Start Health Check*****`n"
    #Collect list of pipelines
    $Pipelines = ((Invoke-RestMethod -Uri "$($LSPro)://$($LSHost):$($LSPort)/_node/stats/pipelines").pipelines.PSObject.Properties | Where-Object {$_.MemberType -eq "NoteProperty"}).Name
    $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  Running pipelines: $($pipelines.count)`n"
    foreach ($pipeline in $pipelines) {
      $log += "  $($pipeline)`n"
    }
    $down = @()
    #Check health of each pipeline
    foreach ($pipeline in $pipelines) {
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  Starting health check on $($pipeline) pipeline`n"
      $pipelineinfo = Invoke-RestMethod -Uri "$($LSPro)://$($LSHost):$($LSPort)/_node/stats/pipelines/$($pipeline)"
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) ephemeral id $($pipelineinfo.ephemeral_id)`n"
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) queue size (bytes) $([string]::Format('{0:N0}',($pipelineinfo.pipelines.$pipeline.queue.queue_size_in_bytes)))`n"
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) queue capacity (bytes) $([string]::Format('{0:N0}',($pipelineinfo.pipelines.$pipeline.queue.max_queue_size_in_bytes)))`n"
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) queued events $($pipelineinfo.pipelines.$pipeline.queue.events)`n"
      if ($pipelineinfo.pipelines.$pipeline.hash -eq $null) {
        $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) down`n"
        $down += $pipeline
      }
      if ($pipelineinfo.pipelines.$pipeline.queue.queue_size_in_bytes -eq $pipelineinfo.pipelines.$pipeline.queue.max_queue_size_in_bytes) {
        $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) queue at max capacity"
        Try {
          Send-MailMessage -SmtpServer $smtp.server -To $smtp.to -From $smtp.from -Subject "Pipeline Queue Full" -Port $smtp.port -Body "Pipeline $($pipeline)'s queue appears to be at full capacity"
        }
        Catch {
           log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($error[0].CategoryInfo.Activity)"+": "+"$($error[0].Exception.Message)`n"
        }
      }
      if (($pipelineinfo.pipelines.$pipeline.queue.queue_size_in_bytes -ne $pipelineinfo.pipelines.$pipeline.queue.max_queue_size_in_bytes) -and ($pipelineinfo.pipelines.$pipeline.hash -ne $null)) {
        $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($pipeline) up`n"
      }
    }
    #Actions on unhealthy pipelines
    if ($down.count -gt 0) {
      foreach ($pipe in $down) {
        Write-Host "$(Get-Date)  Pipeline $($pipe) appears to be down. Collecting logs..."
        #Compress logs for each failed pipeline
        $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  Collecting $($pipe) logs...`n"
        Try {
          Compress-Archive -LiteralPath "$($LogRoot)\pipeline_$($pipe).log" -CompressionLevel Fastest -DestinationPath "$($LogRoot)\pipeline_$($pipe)_$($Date).zip"
        }
        Catch {
           log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($error[0].CategoryInfo.Activity)"+": "+"$($error[0].Exception.Message)`n"
        }
      }
      #Compress logstash log
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  Collecting logstash-plain.log...`n"
      Try {
        Compress-Archive -LiteralPath "$($LogRoot)\logstash-plain.log" -CompressionLevel Fastest -DestinationPath "$($LogRoot)\logstash-plain_$($Date).zip"
      }
      Catch {
        log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($error[0].CategoryInfo.Activity)"+": "+"$($error[0].Exception.Message)`n"
      }
      #Send compressed logs in email notification
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  Sending mail notification`n"
      Try {
        Send-MailMessage -SmtpServer $smtp.server -To $smtp.to -From $smtp.from -Subject "Pipeline Down Detected" -Port $smtp.port -Attachments (Get-ChildItem "$LogRoot\*.zip")
      }
      Catch {
        log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  $($error[0].CategoryInfo.Activity)"+": "+"$($error[0].Exception.Message)`n"
      }
      #Remove compressed logs
      Remove-Item (Get-ChildItem "$LogRoot\*.zip") -Force -Confirm:$false
      Restart-Service Logstash
      Remove-Variable down
      Do {
        (Get-Service Logstash).Status
        Start-Sleep -Seconds 5
      }
      Until (((Get-Service Logstash).Status) -eq "Running")
      Send-MailMessage -SmtpServer $smtp.server -To $smtp.to -From $smtp.from -Subject "Logstash Successfully Restarted" -Port $smtp.port
    #Actions on no unhealthy pipelines
    } else {
      $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  All pipelines running`n"
      Write-Host "$(Get-Date)  All pipelines up"
    }
  }
  $log += "$(Get-Date -Format 'MM-dd-yyyy HH:mm:ss')  *****End Health Check*****`n"
  $log | Out-File "$($LogRoot)\MonitorService.log" -Append
  Remove-Variable log
  Start-Sleep -Seconds 300
}

Answer 1

发现了一些我忽略的问题。

1. 在用户系统下使用交互式PowerShell会话运行脚本时，我能够识别出文件访问权限的几个问题。已通过将文件复制到临时目录，然后对其执行操作来解决这些问题。

1. 最重要的是，我使用的指南不能正常工作。运行'NSSM edit‘后，它显示该服务仅执行PowerShell，没有定义脚本的参数。因此，该服务只是在执行一个空的powershell会话*facepalm。