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Dell OpenManage Plug-in Version 2.0 for Nagios Core User’s Guide

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Discovering Dell devices

You can discover all the supported Dell devices using this plug-in.

Prerequisites:

  • If you are using SNMP protocol for discovery, ensure that SNMP version 1 or SNMP version 2 are enabled, community string is set and configured for Servers or Dell Storage devices. For more information see Appendix.

  • A secured network connectivity is established between Nagios Core and the device.

  • It is recommended that the device must have a resolvable FQDN.

  • WS-MAN is enabled and configured for discovering Dell chassis devices

  • If you are using WS-MAN protocol, it is recommended that you use non-default account credentials.

To discover Dell devices:
  1. Log in to Nagios Core with Nagios administrator privileges.
  2. Navigate to the directory <NAGIOS_HOME>/dell/scripts
  3. Run the Dell Device Discovery Utility with the option: perl dell_device_discovery.pl -h

    The script syntax and information on options are displayed. For more information see About Dell Discovery Utility .

    Based on your requirement do the following:

    • NOTE: Before running the utility, ensure that you have updated protocol related information, for more information see About Protocol Parameters.

    To discover a device using an IP address or FQDN:

    • perl dell_device_discovery.pl -H <IP address or FQDN name>

    To discover using subnet with mask:

    • perl dell_device_discovery.pl -S <Subnet with mask>

      An example format for subnet with mask: 11.98.149.0/24

    To discover using a list of IP addresses present in a file:

    • perl dell_device_discovery.pl -F <IP address list file>

    • For the -P option, Opt for a protocol:

      • NOTE: Ensure that the IP list that you provide in the file is new-line separated.
  4. When prompted to confirm the discovery of the Dell device (s), press Y and then Enter to continue. To exit the discovery process, press any other key followed by Enter or press Enter to exit.
  5. Once the discovery utility script is run, verify the Nagios configuration by running the command <NAGIOS_HOME>/bin/nagios -v /usr/local/nagios/etc/nagios.cfg .
  6. Ensure that no errors are present and then restart Nagios Core by running the command service nagios restart .
  7. You can view the logged information in the Log file path: <NAGIOS_HOME>/var/dell/discovery_<yyyymmddhhmiss>.dbg In the filename, <yyyymmddhhmiss> pertains to the time when the log information was gathered; yyyy is the calendar year, mm is month, dd is date, hh is hour of the day, mi is minutes, and ss is seconds.
After completion of discovery :

  • Dell device Host definition and its service definitions are created in the Nagios server and this is subsequently used for monitoring the Dell devices.

    The discovered Dell devices and their services are displayed in the Host view and the Services view in the Nagios Core console. Wait for the scheduled service to complete for the service details to be displayed.

  • The discovered Dell devices are displayed in the Map view in the Nagios Core console.

Using the -t or the -c options

The -t option can be used while discovering the Dell devices if you have modified the dell_device_services_template.cfg file, which is the template file for basic or detailed monitoring of Dell devices, according to your requirement and the file is saved in a non-default location.

Format:

perl dell_device_discovery.pl -H <IP address list file> –t <Complete path of the services template file>

The -c option can be used while discovering the Dell devices if you have modified the dell_device_comm_params.cfg file, which is the protocol specific configuration file, according to your requirement and the file is saved in a non-default location.

Format:

perl dell_device_discovery.pl -H <IP address list file> –c <Complete path of the protocol specific config file>

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