[Xymon] DHCP monitoring
Storer, Raymond
storerr at nibco.com
Mon Mar 3 19:46:25 CET 2014
You might try using PowerShell in 2012 too (just an example of some possibilities ... not an actual production script I'm using):
Import-Module DhcpServer
$dhcpServers = @('server1','server2')
[bool]$canGetDhcpAddr = $false
[long]$freeLeases = 0
[long]$inUseLeases = 0
[double]$percentLeasesUsed = 0.0
[long]$reservedLeases = 0
foreach ($dhcpSvr in $dhcpServers) {
foreach ($v4Scope in (Get-DhcpServerv4Scope -ComputerName $dhcpSvr)) {
$v4LeaseAddr = Get-DhcpServerv4FreeIPAddress -ComputerName $dhcpSvr -ScopeId $v4Scope.ScopeId
if ($v4LeaseAddr -ne $null) { # hey, we were able to obtain a dhcp address
$canGetDhcpAddr = $true
}
else { # oh, darn! we were not able to obtain a dhcp address
$canGetDhcpAddr = $false
}
$v4Stats = Get-DhcpServerv4ScopeStatistics -ComputerName $dhcpSvr -ScopeId $v4Scope.ScopeId
$freeLeases = $v4Stats.Free
$inUseLeases = $v4Stats.InUse
$percentLeasesUsed = $v4Stats.PercentageInUse
$reservedLeases = $v4Stats.Reserved
}
}
Ray Storer
NIBCO INC.
574.295.3457
From: Xymon [mailto:xymon-bounces at xymon.com] On Behalf Of Jorge Lopes
Sent: Sunday, February 23, 2014 4:19 PM
To: Xymon MailingList
Subject: [Xymon] DHCP monitoring
Good Morning,
Has anyone updated/modified the DHCP plugin for xymon,
Currently we are using the following ext script to monitor our DHCP servers on 2008 however we seem to be running into issues on 2012
Thanks in advance.
Jorge
BBDHCP.VBS
~~~~~~~~~~~~~~
option Explicit
' BigBrother External Script for testing to see if Dhcp is up and responding on Window 2003 and above
' Gives Scope details running on the server specified With Active/Excluded and Available leases
' Installation
' 1) Modify the vairables below to match your system.
' 2) Add the script to your externals list in bbntcfg on the DHCP Server.
' so that it runs at least every 6500 seconds
' 3) Make sure you set the Saved Logs Location to %BBHOME%\ext
' Author Graeme Shea, Shea Technology Pty Ltd. graeme AT shea.com.au
' Adapted from and very heavly based on work by Brett Wilson - Brett_Wilsons at hotmail.com<mailto:Brett_Wilsons at hotmail.com> and André Hugener
Dim Server, Alias, Yellow, Red, BBext, Colour, Col, WshShell, FileSys, OutDhcp, Version, BBextFolder
Dim Check, Dhcp, NoDhcp, Status, Scope, Line, u, Tokens, Tmp, InUse, Free, BB, BBin, pend, j
'---Vairables---
Server = "DHCPservername" ' Dhcp Server to test (not neccessarily the server running from)
Alias = "DHCPServername" 'Name machine is known at BB server "," instead of "."!!!
Yellow = 3 ' Min Available Leases when BB turns Yellow
Red = 2 ' Min Available Leases when BB turns Red
'---End Vairables---
'---Nothing to Change under this line---
'On Error Resume Next'
'-------------------------------------------------------------------------------------
' Version 0.1 Oringal version using dhcpcmd.exe for NT4 Resource kit
' Version 0.2 Uses builting Windows 2003 netsh command.
' Version 0.2.1 Fixed dialog error on 64bit systems.
Version = "0.2.1"
Set WshShell = WScript.CreateObject("WScript.Shell")
Set FileSys = CreateObject("Scripting.FileSystemObject")
On Error Resume Next
BBext = WshShell.RegRead("HKLM\SOFTWARE\bbwin\tmppath\")
' If 64 bit system then reg file has moved and will raise an error.
If Err Then
err.clear
BBext = ("c:\progra~2\bbwin\tmp")'
If Err Then
MsgBox " Big Brother Client not installed. ",," Fatal Error. "
End If
on Error GoTo 0
End If
If BBext = "" Then
MsgBox " Big Brother External Path not set. You need to set the Saved Logs Location " _
& VbCrLf & " using the bbntcfg utility. ",," Fatal Error. "
WScript.Quit
End If
On Error GoTo 0
'Need short path names or else Netsh creates a c:\program file.
Set BBextFolder = FileSys.GetFolder(BBext)
BBext = BBextFolder.ShortPath
Status = "status " & Alias & ".dhcp "
Dhcp = "cmd /c " & "Netsh.exe dhcp server \\"& Server & " show mibinfo > " & bbext & "\dhcp.txt"
WshShell.run Dhcp, 0, True
' Check to see that Dhcp is running
Set Check = FileSys.OpenTextFile (bbext & "\dhcp.txt")
NoDhcp = Check.ReadLine
If InStr(1,NoDhcp, "Unable") OR InStr(1,NoDhcp, "Not Found")Then
Dhcp = "No"
Status = "red " & Status & " red" & " " & Now() & Vbcrlf &_
"Warning!! Dhcp Is not Running On Server - " & Server
End If
' If Dhcp is running retrieve Active Scopes and lease numbers
Do While Not check.AtEndOfStream
Line = Check.ReadLine
u = Instr(1,Line,"Subnet")
if u <> 0 Then
tokens = Split( Line,"=")
tmp = Check.ReadLine
Inuse = Split( tmp,"=")
tmp = Check.ReadLine
Free = Split( tmp,"=")
tmp = Check.ReadLine
pend = Split( tmp,"=")
j=(Cint(Free(1))+Cint(Inuse(1))+Cint(pend(1)))
If j < 1 Then
Colour = "blue"
Else
Colour = "green"
if Col < 1 Then
Col = 1
End If
If Cint(Free(1)) <= Yellow Then
Colour = "yellow"
If Col < 2 Then
Col = 2
End If
End If
If Cint(Free(1)) <= Red Then
Colour = "red"
Col = 3
End If
End If
Scope = Scope & " Scope " & Tokens(1) & " " & Fix(Inuse(1)) & " Active/Excluded" &_
VbCrlf & "&" & Colour & " Scope " & Tokens(1) & " " & Fix(Free(1)) & " Available" &_
VbCrlf & " Scope " & Tokens(1) & " " & Fix(pend(1)) & " Pending" & VbCrlf &_
"Status: " & Colour & VbCrlf & VbCrlf
End If
Loop
Colour = "red"
If Col = 0 Then
Colour = "blue"
End If
If Col = 1 Then
Colour = "green"
End If
If Col = 2 Then
Colour = "yellow"
End If
If Dhcp <> "No" Then
Status = colour & "+2h " & Status & Colour & " " & Now() & Vbcrlf & _
"Dhcp is running on Server " & Server & " with the following configuration" & VbCrLf
End If
Set OutDhcp = filesys.CreateTextFile(BBext & "\dhcp", True)
OutDhcp.WriteLine Status
OutDhcp.WriteLine Scope
OutDhcp.WriteLine ""
OutDhcp.WriteLine "BBDhcp Version " & Version
Outdhcp.close
Check.close
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