PDU without a handler

If there is no built-in handler for your PDU model, you can add such a PDU to the platform in "Without handler" mode. To do this, when creating or editing a PDU, select No handler in the Handler field. For more information on creating a PDU, see the Adding a PDU article.

You can write a custom PDU handler. For more information, see the Creating a PDU handler article.

Limitations of PDU without a handler

PDU without a handler will operate with limitations:

periodic polling of the PDU is not performed;
energy consumption statistics per PDU port are not collected.

If the server is not connected to BMC and receives power only from a port of PDU without a handler, operations related to power management, including OS installation and reinstallation, are unavailable for it.

Working with ports

If you specify the number of PDU ports when creating a PDU without a handler, the ports will have the following parameters:

Name of the port — Port <port_number>;
Status — Without handler.

You can change the number of ports when editing a PDU:

if you increase the number of ports, the platform will create new ports with similar parameters;
if you decrease the number of ports, ports from the end of the list will be removed. If at least one of such ports is connected to another device, the operation will fail with an error and the ports will not be removed.

Handler change

Transition from "Without handler" mode to handler mode

You can change the PDU handler. In this case:

The platform starts polling the PDU.
Based on the polling results, PDU ports are created.
All created free ports for PDU without handler will be deleted. Ports connected to equipment will remain until you free them and run PDU polling again.

Transition from handler to "Without handler" mode

You can enable Without handler mode for PDU. In this case:

if Number of ports is not specified and there are no connections to PDU ports, all ports will be deleted. If at least one port is connected to equipment, the operation will fail and the handler will not change. In this case, you need to free the ports or specify a sufficient number in the Number of ports parameter;
if Number of ports is specified, then:
- the PDU has fewer ports than specified in the device card, new ports will be generated.
- if the PDU has more ports than specified in the device card, excess PDU ports will be deleted. If at least one such port is connected to equipment, the operation will fail and the handler will not change.

Useful tips