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How do I create a simple program or script that will notify me when one of our servers is down?

Posted on 2008-06-13
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Last Modified: 2011-06-09
We have about a dozen Windows servers in our office, some of which are virtual. Some of the less-essential servers go down on occasion and I don't know about it untl after a problem has arisen. For example, we have a fax server that will go down sometimes and I won't know until customers call and say they can't fax something to us.

I thought about running a batch file or script that would ping each server on the hour and let me know if the ping fails. Then I realized we have one server where being powered on isn't enough -- it must be logged in, so a startup program can launch (for some reason it won't start as a system service).

What can I do to monitor my servers in an old-school way that involves some simple scripting? I'd be willing to use an open-source program to handle it if one exists, but this isn't something I want to throw hundreds of dollars at (with a commercial program) when I know can do it for free either on my own or with a program someone else has already written for this purpse. I am decent with batch files and I've done some beginner stuff with C++ and VB scripting. What's the best way to attack this problem?
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Question by:wdabbs
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by:FishMonger
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Nagios is what our company uses, and it's open source.

http://www.nagios.org/
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by:BSonPosh
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I would recommend Powershell. You could use a very simple script to connect to each server and let you know the Current Uptime and check specific services.
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RobSampson earned 200 total points
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Hi, here's a VBS script that will monitor servers in a text file called "computers.txt", pinging them every two minutes.

We could modify the script to check for the existence of the Explorer.exe process, which would tell us whether someone was currently logged in or not....

Regards,

Rob.
strFile = "computers.txt"

strLogFile = "LogFile.txt"

 

Set objIE = CreateObject("InternetExplorer.Application")

objIE.Navigate "about:blank"

objIE.ToolBar = False

objIE.AddressBar = False

objIE.Top = 0

objIE.left = 0

objIE.Width = 800

objIE.Height = 600

objIE.Visible = True

objIE.menubar = False

objIE.StatusBar = False

objIE.Document.Body.Title = "Ping Status"

 

Set objFSO = CreateObject("Scripting.FileSystemObject")

Const intForReading = 1

While IsObject(objIE) = True

	On Error Resume Next

	objIE.Document.Body.InnerHTML = "<br><table><tr><td width='40' bgcolor='green'></td><td> Successful ping</td><td width='40' bgcolor='orange'></td><td> Successful ping but failed connectivity</td><td width='40' bgcolor='red'></td><td> Failed ping</td></table><br>"

	If Err.Number <> 0 Then WScript.Quit

	On Error GoTo 0

	Set objFile = objFSO.OpenTextFile(strFile, intForReading, False)

	While Not objFile.AtEndOfStream

		strComputer = objFile.ReadLine

		If Ping(strComputer) = True Then

			strColor = "green"

			On Error Resume Next

			Set objWMIService = GetObject("winmgmts:" _

				& "{impersonationLevel=impersonate}!\\" & StrComputer & "\root\cimv2")

			If Err.Number <> 0 Then strColor = "orange"

			Err.Clear

			On Error GoTo 0

		Else

			strColor = "red"

		End If

		On Error Resume Next

		objIE.Document.Body.InnerHTML = objIE.Document.Body.InnerHTML & "<table><tr><td width='200'>" & strComputer & "</td><td width='40' bgcolor='" & strColor & "'></td></tr></table>" & VbCrLf

		If strColor = "green" Then

			strLog = Now & ": " & strComputer & " - GREEN - pinged successfully."

		ElseIf strColor = "orange" Then

			strLog = Now & ": " & strComputer & " - ORANGE - pinged successfully, but connectivity failed."

		ElseIf strColor = "red" Then

			strLog = Now & ": " & strComputer & " - RED - ping failed."

		End If

		WriteToLog strLog

		If Err.Number <> 0 Then WScript.Quit

		On Error GoTo 0

	Wend

	objFile.Close

	Set objFile = Nothing

	On Error Resume Next

	strFullPage = objIE.Document.Body.InnerHTML

	If Err.Number <> 0 Then WScript.Quit

	On Error GoTo 0

	For intSeconds = 120 To 0 Step - 1

		On Error Resume Next

		objIE.Document.Body.InnerHTML = strFullPage & "<br><br>Refreshing in " & intSeconds & " seconds..."

		If Err.Number <> 0 Then WScript.Quit

		On Error GoTo 0

		WScript.Sleep 1000

	Next

Wend

Set objFSO = Nothing

MsgBox "Done"

 

Function Ping(strComputer)

	Dim objShell, boolCode

	Set objShell = CreateObject("WScript.Shell")

	boolCode = objShell.Run("Ping -n 4 -w 300 " & strComputer, 0, True)

	If boolCode = 0 Then

		Ping = True

	Else

		Ping = False

	End If

End Function

 

Sub WriteToLog(strText)

	Set objLogFile = objFSO.OpenTextFile(strLogFile, 8, True)

	objLogFile.WriteLine strText

	objLogFile.Close

	Set objLogFile = Nothing

End Sub

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Author Comment

by:wdabbs
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@RobSampson:

Thanks for the script, I like it. How can I use it to notify me by email? Do I need a separate routine to monitor that log file and look for errors?
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by:sr75
sr75 earned 100 total points
Comment Utility
I had a script that would ping an array of servers, log it, and send an email if the server is non-responsive.  I cannot find it at the moment (I left my thumb drive at home).   However, I use this code to send me the emails.  You should be able to add that to RobSampson's script.
Set objMessage = CreateObject("CDO.Message")

objMessage.Subject = "Example CDO Message"

objMessage.Sender = "sender@domain.com"

objMessage.To = "recipient@domain.com"

objMessage.TextBody = "This is some sample message text."

objMessage.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2

objMessage.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "smtp.domain.com"

objMessage.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25

objMessage.Configuration.Fields.Update

objMessage.Send

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by:RobSampson
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Thanks for the grade.  Sorry for not replying...I've been busy....I hope you've managed to piece together the emailng code...

Regards,

Rob.
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by:bsharath
Comment Utility
wdabbs
Did you get this to work togeather?
If yes can you post the final post please... So we can use them....
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