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July 11th, 2025 10:01
Dell EMC OpenManage Plug-in for Nagios XI Troubles
Hi,
Understand that the plug-in has reached its EOL but I think it will be useful in using for the system that I'm helping set up and monitor. The system I have is an air-gapped one so I've had to individually download the required packages to install the Dell EMC OpenManage Plug-in for Nagios XI (I've downloaded v3.2.0) onto a Debian 12.8 VM that has Nagios XI installed on it.
When trying to run Step 1 from the user guide (https://www.dell.com/support/manuals/en-uk/openmanage-plugin-nagios-xi/nagios_xi_3.2.0_ug/configuration-wizard-dell-emc-openmanage-plug-in-for-nagios-xi-step-2?guid=guid-db572665-b759-42a0-84d1-82168a58fb9b&lang=en-us) I find that I get the response 'None of the IP addresses are reachable' even though I am able to locally ping the IP I'm trying to reach. Additionally, using the AutoDiscovery Wizard on Nagios XI does yield a result but somehow, using this result in Step 1 doesn't seem to be working. To provide some context, I have got some Dell PowerEdge Servers and Dell ME5024 SANs I'm hoping to use this plug-in to monitor.
From reading other forums, some users are able to manually run the plug-in script from the shell which I've also tried doing but I get the error below:
Any help would be much appreciated :)
DELL-Charles R
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July 15th, 2025 13:22
Hello,
OpenManage Plug-in for Nagios XI is End-of-Life and no further releases are planned. We also see only RHEL 8.5 is supported OS. So we are supporting as best effort.
https://www.dell.com/support/manuals/en-uk/openmanage-plugin-nagios-xi/nagios_xi_3.2.0_ug/support-matrix?guid=guid-7863dcab-226a-461c-8abb-ba3e6b9724e1&lang=en-us
I searched on your error and you may know more than me it's meaning:
ModuleNotFoundError: No module named 'Cryptodome'
means that the Python module Cryptodome (part of the pycryptodome package) is not installed in your environment. This module is often required by security-related scripts or plugins, including some used in Nagios XI plug-ins for Dell OpenManage.
How to Fix It
You can resolve this by installing the correct package:
For Debian 12.8 (your environment):
Run the following command:
sudo apt update
sudo apt install python3-pycryptodome
Alternatively, if you're using a Python virtual environment or pip-based setup:
pip3 install pycryptodome
Note: The module is named pycryptodome, but it is imported in Python as Cryptodome.
Verify Installation
After installation, test it with:
python3 -c "from Cryptodome.Cipher import AES; print('Cryptodome is working')"
If this runs without error, the module is correctly installed.
We may see if anyone in the community has tried this and can share their experience.
DELL-Erman O
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July 11th, 2025 14:11
Hi,
just a heads up even if you can ping the IP, that doesn't necessarily mean the plugin can talk to the iDRAC. The Dell OpenManage plugin uses either Redfish (port 443) or WS-Man (ports 5985/5986) for communication, so make sure those ports are open and accessible from your Nagios XI server.
Also, if you're using hostnames instead of IPs (especially in an air-gapped setup), double-check that your
/etc/hostsfile is properly configured so the system can resolve them correctly. Another thing to look out for: make sure all the prerequisites are installed and configured correctly. The plugin depends on the OMSDK (OpenManage SDK), so if that's missing or misconfigured, it can definitely cause issues like this.Hope that helps!
lostandconfuseduser
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July 15th, 2025 12:20
Hi,
Thanks so much for responding so quickly and for the information you've provided. I do have a follow-up question though - does the EMC OpenManage Plug-in not support SNMP between the equipment to Nagios XI?
Thanks!