Yancy Ribbens' presentation on using Nagios with WMI The presentation was given during the Nagios World Conference North America held Sept 25-28th, 2012 in Saint Paul, MN. For more information on the conference (including photos and videos), visit: http://go.nagios.com/nwcna

1. Advanced Windows Monitoring
WMI, Powershell and VBscript
Yancy Ribbens
yribbens@nagios.org

2. Overview
Tips and techniques for writing plugins
Return Codes
VBScript
Powershell
Deploying and running custom scripts
NSClient++
NRDS_Win
WMI system
Configuring WMI
Example queries
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3. Return Codes
http://nagiosplug.sourceforge.net/developer-guidelines.html
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4. System Exit Codes
Powershell
$lastexitcode
Command Shell (DOS)
%errorlevel%
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5. Dissection of VB Script
CheckDC
VBScript for monitoring Domain Controller
Controlling Exit Code
wscript.quit( ExitCode )
if instr(msg,"CRITICAL") then
msg1 = "CRITICAL - "
wscript.echo msg1 & msg
wscript.quit(intCritical)
else
msg1 = "OK - "
wscript.echo msg1 & msg
wscript.quit(intOK)
end if
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6. Running checkDC
Success example :)
Fail example :(
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7. Dissection of Powershell
check_windows_app_installs.ps1
Write-Host "Program Files Counted: " -nonewline
$Total = $BaseLine.Length - 5
Write-Host $Total
Write-Host "n"
WriteList $Current ($Current.length - 2)
exit 0
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8. Details table
Write-Host "Program Files Counted: " -nonewline
$Total = $BaseLine.Length - 5
Write-Host $Total
Long output split on “newline” character Write-Host "n"
Appears in details WriteList $Current ($Current.length - 2)
exit 0
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9. Running plugins
NSClient++
Install clip
NRDS_Win
Install Clip
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11. [Section Break Title]

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