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DHCP Server

Connector dependencies​

The following monitoring connectors will be installed when you install the DHCP Server connector through the Configuration > Connectors > Monitoring Connectors menu:

Pack assets​

Templates​

The Monitoring Connector DHCP Server brings a host template:

  • Infra-DHCP-custom

The connector brings the following service templates (sorted by the host template they are attached to):

Service AliasService TemplateService Description
DHCPApp-Protocol-DHCP-customCheck the availability of the DHCP server

The services listed above are created automatically when the Infra-DHCP-custom host template is used.

Collected metrics & status​

Here is the list of services for this connector, detailing all metrics and statuses linked to each service.

NameUnit
times

Prerequisites​

To use the DHCP Server connector, ensure the DHCP server is accessible over the network.

Installing the monitoring connector​

Pack​

The installation procedures for monitoring connectors are slightly different depending on whether your license is offline or online.

  1. If the platform uses an online license, you can skip the package installation instruction below as it is not required to have the connector displayed within the Configuration > Connectors > Monitoring Connectors menu. If the platform uses an offline license, install the package on the central server with the command corresponding to the operating system's package manager:
dnf install centreon-pack-infrastructure-dhcp
  1. Whatever the license type (online or offline), install the DHCP Server connector through the Configuration > Connectors > Monitoring Connectors menu.

Plugin​

Since Centreon 22.04, you can benefit from the 'Automatic plugin installation' feature. When this feature is enabled, you can skip the installation part below.

You still have to manually install the plugin on the poller(s) when:

  • Automatic plugin installation is turned off
  • You want to run a discovery job from a poller that doesn't monitor any resource of this kind yet

More information in the Installing the plugin section.

Use the commands below according to your operating system's package manager:

dnf install nagios-plugins-dhcp

Using the monitoring connector​

Using a host template provided by the connector​

  1. Log into Centreon and add a new host through Configuration > Hosts.
  2. Fill in the Name, Alias & IP Address/DNS fields according to your resource's settings.
  3. Apply the Infra-DHCP-custom template to the host. A list of macros appears. Macros allow you to define how the connector will connect to the resource, and to customize the connector's behavior.
  4. Fill in the macros you want. Some macros are mandatory.

There are no predefined macros for this host template. You can add them manually if required.

  1. Deploy the configuration. The host appears in the list of hosts, and on the Resources Status page. The command that is sent by the connector is displayed in the details panel of the host: it shows the values of the macros.

Using a service template provided by the connector​

  1. If you have used a host template and checked Create Services linked to the Template too, the services linked to the template have been created automatically, using the corresponding service templates. Otherwise, create manually the services you want and apply a service template to them.
  2. Fill in the macros you want (e.g. to change the thresholds for the alerts). Some macros are mandatory (see the table below).
MacroDescriptionDefault valueMandatory
INTERFACENAMEInterface to to use for listeningeth0
EXTRAOPTIONSAny extra option you may want to add to the command (a --verbose flag for example). All options are listed here.
  1. Deploy the configuration. The service appears in the list of services, and on the Resources Status page. The command that is sent by the connector is displayed in the details panel of the service: it shows the values of the macros.

How to check in the CLI that the configuration is OK and what are the main options for?​

Once the plugin is installed, log into your Centreon poller's CLI using the centreon-engine user account (su - centreon-engine). Test that the connector is able to monitor a resource using a command like this one (replace the sample values by yours):

sudo ./check_dhcp -i eth0

The expected command output is shown below:

OK: Received 1 DHCPOFFER(s), max lease time = 600 sec.

Troubleshooting​

Please find the troubleshooting documentation for Centreon Plugins typical issues.

Available options​

Here is a complete list of available options for Nagios check_dhcp Plugin.