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Saturday, September 17, 2016

Monitoring Windows Services using PowerShell

Recently I was interested in finding a way to monitor a windows service. What I needed was to check whether the service is running and if not running get a notification and try to restart the service. Following PowerShell script does exactly that, it checks for Microsoft CRM Asynchronous Service and the Microsoft CRM Asynchronous Maintenance Service activity and send 2 emails to Admin and Dev. This needs to be then scheduled using Windows Task Scheduler or SQL Server Job.

### Checking for CRM Async and Maintenance service failure and try restarting, if failing send an email notification.

 

## Function to send mail notification.

function Send_Email ([string]$strEmailSubject, [string]$strEmailBody)

{

       $EmailFrom = "Arjuna@Email.com"

       $EmailTo = "Admin@Email.com, Dev@Email.com"

       $EmailSubject = $strEmailSubject

       $EmailBody = $strEmailBody

       $EmailSMTPServer = "SMTP.server.com"

       ## Creating Mail Message object.

       $SMTPMessage = New-Object System.Net.Mail.MailMessage $EmailFrom, $EmailTo, $EmailSubject, $EmailBody

       ## Enabling HTML mail body.

       $SMTPMessage.IsBodyHtml = $true

       ## Creating SMTP client object.

       $SMTPClient = New-Object System.Net.Mail.SMTPClient $EmailSMTPServer

       ## Sending mail.

       $SMTPClient.Send($SMTPMessage)

       ## Sending mail method 2.

       ##send-mailmessage -from "Arjuna@Email.com" -to "Admin@Email.com, Dev@Email.com" -subject "CRM Async Service Failed" -body "Please check." -smtpserver "SMTP.server.com"

       ## Sending mail method 2 using parameters.

       ##send-mailmessage -from $EmailFrom -to $EmailTo -subject $EmailSubject -body $EmailBody -smtpserver $EmailSMTPServer

}

 

## Function to check the service activity.

function Check_Service

{

       ## Get all services which has a Name like MSCRMAsyncService, Start Mode is Auto and service State is Running.

       $FailedAsyncService = Get-WmiObject Win32_Service | Where-Object {$_.Name -like 'MSCRMAsyncService' -and $_.StartMode -eq 'Auto' -and $_.State -ne 'Running'} | Select-Object DisplayName

       ## For Testing.

       ##Write-Host "A: " $FailedAsyncService

 

       ## Get all services which has a Name like MSCRMAsyncService$maintenance, Start Mode is Auto and service State is Running.

       $FailedAsyncMainteService = Get-WmiObject Win32_Service | Where-Object {$_.Name -like 'MSCRMAsyncService$maintenance' -and $_.StartMode -eq 'Auto' -and $_.State -ne 'Running'} | Select-Object DisplayName

       ## For Testing.

       ##Write-Host "B: " $FailedAsyncMainteService

 

       ## Checking whether the Async Service has failed.

       if ($FailedAsyncService -ne $NULL)

       {

              ## Trying to start the failed Async Service.

              Start-Service -displayname "Microsoft Dynamics CRM Asynchronous Processing Service"

              ## Service Name can also be used to start the servie.

              ##Start-Service MSCRMAsyncService

              ## Get all services which has a Name like MSCRMAsyncService, Start Mode is Auto and service State is Running.

              $AsyncServiceStarted = Get-WmiObject Win32_Service | Where-Object {$_.Name -like 'MSCRMAsyncService' -and $_.StartMode -eq 'Auto' -and $_.State -ne 'Running'} | Select-Object Name

              ## Checking the service to see whether it started.

              if ($AsyncServiceStarted -ne $NULL)

              {

                     ## Calling Send_Mail function to notify.

                     Send_Email ("CRM Async Service Failed.") ("System has detected that the following CRM Async Service has failed. System automatically tried restarting the service but it was unsuccessful. Try manual start. <BR/><BR/>" + $FailedAsyncService)

              }

              else

              {

                     ## Calling Send_Mail function to notify.

                     Send_Email ("CRM Async Service Restarted.") ("System has detected that the following CRM Async Service has failed. System automatically tried restarting the service and it was successful. <BR/><BR/>" + $FailedAsyncService)

              }

       }

 

       ## Checking whether the Async Maintenance Service has failed.

       if ($FailedAsyncMainteService -ne $NULL)

       {

              ## Trying to start the failed Async Maintenance Service.

              Start-Service -displayname "Microsoft Dynamics CRM Asynchronous Processing Service (maintenance)"

              ## Get all services which has a Name like MSCRMAsyncService$maintenance, Start Mode is Auto and service State is Running.

              $AsyncMainteServiceStarted = Get-WmiObject Win32_Service | Where-Object {$_.Name -like 'MSCRMAsyncService$maintenance' -and $_.StartMode -eq 'Auto' -and $_.State -ne 'Running'} | Select-Object Name

              ## Checking the service to see whether it started.

              if ($AsyncMainteServiceStarted -ne $NULL)

              {

                     ## Calling Send_Mail function to notify.

                     Send_Email ("CRM Async Service Failed.") ("System has detected that the following CRM Async Service has failed. System automatically tried restarting the service but it was unsuccessful. Try manual start. <BR/><BR/>" + $FailedAsyncMainteService)

              }

              else

              {

                     ## Calling Send_Mail function to notify.

                     Send_Email ("CRM Async Service Restarted.") ("System has detected that the following CRM Async Service has failed. System automatically tried restarting the service and it was successful. <BR/><BR/>" + $FailedAsyncMainteService)

              }

       }

}

 

## Calling the Check_Service function.

Check_Service