java Powershell脚本在满足条件后未退出循环，并且在出现故障条件时被捕获

3 周，2 日 Questions & Answers 30

我正在编写powershell脚本，以停止和启动远程服务器上的服务。如果重新启动操作失败，我希望脚本发送电子邮件警报

脚本的目标是停止服务，休眠几秒钟，然后检查服务。如果服务未运行，请尝试启动服务并休眠，然后再检查。每次脚本无法启动服务时，它都会向retrycount添加+1，如果重试次数超过最大重试次数，脚本将触发失败通知。如果服务正在运行，它应该将重启操作标记为完成并退出循环

我遇到的问题是，当我第一次运行脚本时，它进入循环，检查服务并错误地将其标记为完成。之后我去检查服务时，服务显示已停止。当我第二次运行脚本时，它停止服务，进入循环，尝试重新启动服务，循环3次，然后捕捉到要触发和发送电子邮件警报的故障情况。它在失败状态下不断循环，数十次，直到我强制退出

我整晚都在为这件事挠头，我不知道哪里出了问题。我将在下面发布脚本：

$VerbosePreference = "continue"
$remoteServer = 'My-RemoteServer01' 
$serviceName = 'MSSQLServerOLAPService'
$service = Get-Service -name $ServiceName
$maxRetries = 2
$retryCount = 0
$restartComplete = $false

stop-service -name $serviceName
write-verbose 'Service Stopped - Sleep 15s'
start-sleep -s 15

write-verbose "Attempt to restart service '$retryCount' "

while ($restartComplete -eq $false){
     if ($service.status -eq 'Running')
        {
         $restartComplete = $true
         write-verbose "restart complete"
         }
         else {
               if ($retryCount -ge $maxRetries)   
                  { 
                   write-verbose "Service Restart Failed - Begin Alert"

                   $smtpServer = ('smtp.mymailserver.com', 00)
                   $msg = new-object Net.Mail.MailMessage
                   $smtp = new-object Net.Mail.SmtpClient($smtpServer)
                   $dateString = get-date

                   $msg.From = 'no-reply@mymailserver.com'
                   $msg.To.Add('L3LYZA@mymailserver.com')
                   $msg.subject = 'URGENT ALERT - Service ' + $service + 'is' + $service.status + 'on' + $remoteServer + '.'
                   $msg.body = ([string]$dateString) + 'Service' + $service + 'is' + $service.status + 'on' + $remoteServer + '.'
                   $smtp.send($msg)

                   write-verbose "Alert Sent - Complete"
                   }
                  else {                 
                        if ($service.status -ne 'Running')   
                           { 
                            start-service -name $serviceName
                            write-verbose 'Service Restarting - Sleep 45s'
                            start-sleep -s 45
                            $retryCount++

                           }
                   }
           }
   }

编辑：解决方案最终改变了我检查服务状态的方式。我还在失败条件中添加了一个掷骰子

$VerbosePreference = "continue"
$remoteServer = 'My-RemoteServer' 
$serviceName = 'MSSQLServerOLAPService'
$service = Get-Service -name $ServiceName
$maxRetries = 2
$retryCount = 0
$restartComplete = $false

stop-service -name $serviceName
write-verbose 'Service Stopped - Sleep 15s'
start-sleep -s 15

write-verbose "Attempt to restart service '$break' "

while ($restartComplete -eq $false){
     if ((Get-Service $serviceName).Status -eq 'Running')
        {
         $restartComplete = $true
         write-verbose "restart complete"
         }
         else {
               if ($retryCount -ge $maxRetries)   
                  { 
                   write-verbose "Service Restart Failed - Begin Alert"

                   $smtpServer = ('smtp.mymailserver.com', 00)
                   $msg = new-object Net.Mail.MailMessage
                   $smtp = new-object Net.Mail.SmtpClient($smtpServer)
                   $dateString = get-date

                   $msg.From = 'noreply@mymailserver.com'
                   $msg.To.Add('L3LYZA@mymailserver.com')
                   $msg.subject = 'URGENT ALERT - Service ' + $service + 'is' + $service.status + 'on' + $remoteServer + '.'
                   $msg.body = ([string]$dateString) + 'Service' + $service + 'is' + $service.status + 'on' + $remoteServer + '.'
                   $smtp.send($msg)

                   write-verbose "Alert Sent - Complete"
                   Throw "service restart failed exit condition met"
                   }
                  else {                 
                        if ((Get-Service $serviceName).Status -ne 'Running')   
                           { 
                            start-service -name $serviceName
                            write-verbose 'Service Restarting - Sleep 45s'
                            start-sleep -s 45
                            $retryCount++

                           }
                    }
            }
   }

$VerbosePreference = "continue" $remoteServer = 'My-RemoteServer01' $serviceName = 'MSSQLServerOLAPService' $service = Get-Service -name $ServiceName $maxRetries = 2 $retryCount = 0 $restartComplete = $false stop-service -name $serviceName write-verbose 'Service Stopped - Sleep 15s' start-sleep -s 15 write-verbose "Attempt to restart service '$retryCount' " start-service -name $serviceName while ($restartComplete -eq $false) { if ((Get-Service $serviceName).Status -eq 'Running') { $restartComplete = $true write-verbose "restart complete" } else { if ($retryCount -ge $maxRetries) { write-verbose "Service Restart Failed - Begin Alert" $smtpServer = "smtp.mymailserver.com" $dateString = get-date $mailFrom = 'no-reply@mymailserver.com' $mailTo('L3LYZA@mymailserver.com') $mailSubject = 'URGENT ALERT - Service ' + $service + 'is' + $service.status + 'on' + $remoteServer + '.' $mailBody = ([string]$dateString) + 'Service' + $service + 'is' + $service.status + 'on' + $remoteServer + '.' Send-MailMessage -SmtpServer $smtpserver -From $mailFrom -To $mailTo -Subject $mailSubject -Body $mailBody write-verbose "Alert Sent - Complete" } else { if ($service.status -ne 'Running') { start-service -name $serviceName write-verbose 'Service Restarting - Sleep 45s' start-sleep -s 45 # Get an updated status from the service: $service = Get-Service -name $ServiceName $retryCount++ } } } }

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java Powershell脚本在满足条件后未退出循环，并且在出现故障条件时被捕获

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