Cpu.vbs - Cpu monitoring check using ActiveXperts Network Monitor
ActiveXperts Network Monitor ships with a powerful set of pre-defined checks. Each individual check has a static number of configuration items. To monitor other items, or to combine monitoring items, you can make use of custom VBScript checks.
Most of the built-in checks have a VBScript equivalent, implemented as a Function in a VBScript (.vbs) file. Out-of-the-box, each VBScript function monitors the same items as the built-in check. Feel free to modify a function. The VBScript check can be customized by editing the VBScript function.
To add a new VBScript-based CPU monitoring check, do the following:
- On the 'Monitor menu', click 'New Monitoring Check (VBScript)'. The 'VBScript Check' dialog box appears;
- In the 'File selection box', select 'Cpu.vbs';
- In the 'Function selection box', select 'CheckCpu';
- In the 'Function parameters group box' enter the required parameters. You can also load a working sample first by clicking on the 'Load a sample, click here' link.
To customize the above monitoring check, click on the 'Edit button' next to the 'File selection box'. Notepad will be launched. You can now make changes to the VBScript function(s).
Cpu.vbs script source code
' ///////////////////////////////////////////////////////////////////////////////
' // ActiveXperts Network Monitor - VBScript based checks
' // (c) ActiveXperts Software B.V.
' //
' // For more information about ActiveXperts Network Monitor and VBScript, please
' // visit the online ActiveXperts Network Monitor VBScript Guidelines at:
' // https://www.activexperts.com/support/network-monitor/online/vbscript/
' //
' ///////////////////////////////////////////////////////////////////////////////
'
Option Explicit
Const retvalUnknown = 1
Dim SYSDATA, SYSEXPLANATION ' Used by Network Monitor, don't change the names
' ///////////////////////////////////////////////////////////////////////////////
' // To test a function outside Network Monitor (e.g. using CSCRIPT from the
' // command line), remove the comment character (') in the following 5 lines:
' Dim bResult
' bResult = CheckCpuUsage( "localhost", "", "CPU0", 80 )
' WScript.Echo "Return value: [" & bResult & "]"
' WScript.Echo "SYSDATA: [" & SYSDATA & "]"
' WScript.Echo "SYSEXPLANATION: [" & SYSEXPLANATION & "]"
' //////////////////////////////////////////////////////////////////////////////
' //////////////////////////////////////////////////////////////////////////////
Function CheckCpuUsage( strComputer, strCredentials, strCPU, nMaxCpuUsage )
' Description:
' Checks CPU usage on a (remote) computer.
' Parameters:
' 1) strComputer As String - Hostname or IP address of the computer you want to monitor
' 2) strCredentials As String - Specify an empty string to use Network Monitor service credentials.
' To use alternate credentials, enter a server that is defined in Server Credentials table.
' (To define Server Credentials, choose Tools->Options->Server Credentials)
' 3) strCpu As String - CPU that you want to monitor. Syntax: CPUx, where x is a zero based index
' 4) nMaxCpuUsage As Number - Maximum allowed CPU usage (%)
' Usage:
' CheckCpuUsage( "<Hostname | IP>", "<Empty String | Server>", "<CPU[0|1|2|...]>", Max_Cpu_Percent )
' Sample:
' CheckCpuUsage( "localhost", "", "CPU0", 60 )
Dim objWMIService
CheckCpuUsage = retvalUnknown ' Default return value
SYSDATA = "" ' Will hold the actual CPU percentage value when the function returns
SYSEXPLANATION = "" ' Set initial value
If( Not getWMIObject( strComputer, strCredentials, objWMIService, SYSEXPLANATION ) ) Then
Exit Function
End If
CheckCpuUsage = checkCpuUsageWMI( objWMIService, strComputer, strCPU, nMaxCpuUsage, SYSDATA, SYSEXPLANATION )
End Function
' //////////////////////////////////////////////////////////////////////////////
' //
' // Private Functions
' // NOTE: Private functions are used by the above functions, and will not
' // be called directly by the ActiveXperts Network Monitor Service.
' // Private function names start with a lower case character and will
' // not be listed in the Network Monitor's function browser.
' //
' //////////////////////////////////////////////////////////////////////////////
Function checkCpuUsageWMI( objWMIService, strComputer, strCPU, nMaxCpuUsage, BYREF strSysData, BYREF strSysExplanation )
Dim nCpuUsage, colCPUs, objCPU
checkCpuUsageWMI = retvalUnknown ' Default return value
Set colCPUs = Nothing
On Error Resume Next
Set colCPUs = objWMIService.ExecQuery( "Select * from Win32_Processor" )
If( Err.Number <> 0 ) Then
strSysData = ""
strSysExplanation = "Unable to query WMI on computer [" & strComputer & "]"
Exit Function
End If
If( colCPUs.Count <= 0 ) Then
strSysData = ""
strSysExplanation = "Win32_Processor class does not exist on computer [" & strComputer & "]"
Exit Function
End If
On Error Goto 0
For Each objCPU In colCPUs
If( objCPU.DeviceID = strCPU ) Then
nCpuUsage = objCpu.LoadPercentage
strSysData = objCpu.LoadPercentage
strSysExplanation = "CPU usage=[" & nCpuUsage & "%], maximum allowed=[" & nMaxCpuUsage & "%]"
If( nCpuUsage > nMaxCpuUsage ) Then
checkCpuUsageWMI = False
Else
checkCpuUsageWMI = True
End If
Exit Function
End If
Next
checkCpuUsageWMI = retvalUnknown
strSysData = ""
strSysExplanation = "Unable to query [" & strCPU & "] on computer [" & strComputer & "]"
End Function
' //////////////////////////////////////////////////////////////////////////////
Function getWMIObject( strComputer, strCredentials, BYREF objWMIService, BYREF strSysExplanation )
On Error Resume Next
Dim objNMServerCredentials, objSWbemLocator, colItems
Dim strUsername, strPassword
getWMIObject = False
Set objWMIService = Nothing
If( strCredentials = "" ) Then
' Connect to remote host on same domain using same security context
Set objWMIService = GetObject( "winmgmts:{impersonationLevel=Impersonate}!\\" & strComputer &"\root\cimv2" )
Else
Set objNMServerCredentials = CreateObject( "ActiveXperts.NMServerCredentials" )
strUsername = objNMServerCredentials.GetLogin( strCredentials )
strPassword = objNMServerCredentials.GetPassword( strCredentials )
If( strUsername = "" ) Then
getWMIObject = False
strSysExplanation = "No alternate credentials defined for [" & strCredentials & "]. In the Manager application, select 'Options' from the 'Tools' menu and select the 'Server Credentials' tab to enter alternate credentials"
Exit Function
End If
' Connect to remote host using different security context and/or different domain
Set objSWbemLocator = CreateObject( "WbemScripting.SWbemLocator" )
Set objWMIService = objSWbemLocator.ConnectServer( strComputer, "root\cimv2", strUsername, strPassword )
If( Err.Number <> 0 ) Then
objWMIService = Nothing
getWMIObject = False
strSysExplanation = "Unable to access [" & strComputer & "]. Possible reasons: WMI not running on the remote server, Windows firewall is blocking WMI calls, insufficient rights, or remote server down"
Exit Function
End If
objWMIService.Security_.ImpersonationLevel = 3
End If
If( Err.Number <> 0 ) Then
objWMIService = Nothing
getWMIObject = False
strSysExplanation = "Unable to access '" & strComputer & "'. Possible reasons: no WMI installed on the remote server, no rights to access remote WMI service, or remote server down"
Exit Function
End If
getWMIObject = True
End Function