Nagios Support Forum

Hi Team ,

We have a requirement to monitor MacOS in Nagios . We are approaching the NCPA method .
I wanted to check if NCPA supports macOS Big Sur ?

Hello @deek

Thanks for reaching out and we see that versions 10.07 to the latest is compatible with NCPA for Mac.

Please see:

• https://www.nagios.org/ncpa/

Perry

Thanks for that information .

We tried installing ncpa agent on the Big Sur 11.2.1 (20D74) MAC operating system but the ncpa listener service did not start .
We used DMG installer for the MACOS version 10.15 + and doesnt seem to be working for the perating system we are using .

Kindly help on the same .

Hello @deek

To follow up we ran a test on ncpa_listener and receive the error message. Appears that it could be python permissions or path-related and we are looking into this further and will follow up.

Thanks,
Perry

Hello @deek

To follow up we have verified that this is a MacOs built-in security feature that will block app's that are not "Apple certified".

In System Preferences > Security & Privacy > General > Allow apps download from: The options ()App Store ()App Store and identified developers are available on recent MacOs versions. There used to be an option to allow from anywhere and that option is no longer available. And the option to add it under Accessibility under Privacy does not work as the ncpa_listener is a service and not an application.

The workaround to disable the MacOs Gatekeeper by:
Verify:
Start and then enable ncpa_listener
Verify running:
Thanks,
Perry

Thanks for that .

And are there any other alternatives ?
Also can you provide the scripts .

Hello @deek

Thanks for following up, unfortunately, there are no other alternatives at this time until there is an update to the NCPA Mac version available.

An example check command would look like this:

• /usr/local/nagios/libexec/check_ncpa.py -t '<your token>' -P 5693 -M 'plugins/check_ping/-H 192.168.x.x'

Thanks,
Perry

Hi Team,

Do we have any options to monitor via ssh and any plugins / scripts that support MacOS to fetch the OS level metrics .

Hello @deek

Thanks for following up, and to answer your question the 'check_by_ssh' requires that the NCPA/NRPE client/agent be installed and the plugin for the check is available in the plugin directory.

I see that Mac has the SNMPd service listed in the launchctl directory and found that there are instructions available to enable SNMP monitoring on Mac's. Once you have enabled the SNMPd service on your Mac you will want to run through a snmpwalk on the device.
Thanks,
Perry