Nagios Support Forum

Hello Support

On our Systems we have NCPA Agent Version 2.0.4 Running on Web Servers with IIS version 8.5

How can we monitor State/Memory/CPU usage of each IIS AppPool listed on those web servers from NagiosXI version 5.4.13 ?

On this site I have seen examples for NRPE/NSClient++ Agent on https://outsideit.net/monitoring-iis-application-pools/

Can you recommend how we can do it with NCPA please?

Thanks

I haven't really tested this, but I don't see why not call the "check_ms_iis_application_pool.ps1" script via check_ncpa.py. You could define a similar command (as the one in the NSClient++ example) in the ncpa.cfg, place your PS script in the NCPA plugins directory, and restart the NCPA_Listener. Test your check from command line on the Nagios XI server (or from the GUI - https://x.x.x.x:5693/gui/api/plugins/ch ... n_pool.ps1).

If it works fine, add a new service to your host.

Hope this helps.

Hello lmiltchev

I tried what you mentioned after placing the script under C:\Program Files (x86)\Nagios\NCPA\plugins then restarted services

When I try to hit the command through the NagiosXI box - I am getting the following

[root@rdnagios libexec]# sudo /usr/local/nagios/libexec/check_ncpa.py -H X.X.X.X -t xXX58UPa -M "agent/plugin/check_ms_iis_application_pool.ps1" -a "-A AppName"
CRITICAL: Cannot retrieve the dynamic parameters for the cmdlet. Retrieving the COM class factory for component with CLSID {688EEEE5-6A7E-422F-B2E1-6AF00DC944A6} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).


When I try from within the web server - I am getting the following
https://X.X.X.X:5693/gui/api/plugins/ch ... n_pool.ps1
I am getting 404 The page you are looking for was not found.

Even though through powershell I tested the powershell script and it working fine
PS C:\Program Files (x86)\Nagios\NCPA\plugins> .\check_ms_iis_application_pool.ps1 -A AppPool
CRITICAL: Application Pool "AppPool" is Stopped.

Anything else that I need to change to make it work from NagiosXI server?

Thansk
Imad

@imadc, In the web browser please type: *Replace my IP address with yours.

Next, go to the API tab in the top level menu. Under API Endpoint dropdown choose plugins, and on the next line choose check_ms_iis_application_pool.ps1.

Next, click on the "View in Alternative Format" button in the buttom left corner of the screen -> As active check using NCPA.py.

Let us know what output you get.

When I try to reload the plugins under API
Nothing will be changed on the screen

Do I have to to change anything in NCPA configuration files after I place the powershell script under plugins folder?

Yyou placed your plugin into the "C:\Program Files (x86)\Nagios\NCPA\plugins\" directory, correct? Can you confirm?

The plugin's path is specified in the ncpa.cfg file.

Example: Does yours look the same?

I am not able to recreate the issue that you are having. As you can see below, all of the plugins in the "C:\Program Files (x86)\Nagios\NCPA\plugins\" directory are listed under the API:
Note: I am running NCPA ver. 2.1.3. The version, that you are running (2.0.4) is somewhat old. I am not sure if this is what is causing the issue, however I would recommend that you upgrade to the latest version of NCPA agent, which is 2.1.4 at the moment.

Thanks @lmiltchev

As recommended I upgraded the NCPA version 2.1.4

Now I am able to see the plugins loaded with the scripts, now I can test it out form the GUI and from NagiosXI

Great! I am glad to hear that!

Do you have any more questions or it is OK to close this topic?

We are almost there
The IIS powershell script need to run under x64 since the commands like Get-WebAppPoolState will fail for example with the following error

{
"returncode": 3,
"stdout": "get-webitemstate : Retrieving the COM class factory for component with CLSID \n{688EEEE5-6A7E-422F-B2E1-6AF00DC944A6} failed due to the following error: \n80040154 Class not registered (Exception from HRESULT: 0x80040154 \n(REGDB_E_CLASSNOTREG)).\nAt C:\\Program Files (x86)\\Nagios\\NCPA\\plugins\\test2.ps1:3 char:1\n+ $AppPool_Status = (Get-WebAppPoolState $args[0]).Value\n+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n + CategoryInfo : NotSpecified: (:) [Get-WebItemState], COMExcepti \n on\n + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException,Micr \n osoft.IIs.PowerShell.Provider.GetItemStateCommand\n \nDefaultAppPool Current Status is"
}

------------------------------------------------

I added the following powershell path under ncpa.cfg to see if that forces powershell to run under x64 but it keeps running it under x86
c:\Windows\Sysnative\WindowsPowerShell\v1.0\


# Since windows NCPA is 32-bit, if you need to use 64-bit powershell, try the following for
# the powershell plugin definition:
# .ps1 = c:\windows\sysnative\windowspowershell\v1.0\powershell.exe -ExecutionPolicy Unrestricted -File $plugin_name $plugin_args
#

# Linux / Mac OS X
.sh = /bin/sh $plugin_name $plugin_args
.py = python $plugin_name $plugin_args

# Windows
#.ps1 = powershell -ExecutionPolicy Bypass -File $plugin_name $plugin_args
.ps1 = C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe -ExecutionPolicy Unrestricted -File $plugin_name $plugin_args
.vbs = cscript $plugin_name $plugin_args //NoLogo
.bat = cmd /c $plugin_name $plugin_args



Is this a limitation because NCPA agent runs under x86?

Knowing that we are runnning the NCPA agents under Windows Server 2012 R2 X64 OS