Opengear ACM5000, Руководство пользователя

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Chapter 8: Power, Environmental & Digital I/O
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Console Server & RIM Gateway User Manual
many clients. upsd also contains access control features to limit the abilities of the clients (e.g. so only authorized
hosts may monitor or control the UPS hardware)

There are a number of NUT clients that connect to upsd to check on the status of the UPS hardware and do
things based on the status. These clients can run on the same host as the NUT server or they can communicate
with the NUT server over the network (enabling them to monitor any UPS anywhere):

The upsc client provides a quick way to poll the status of a UPS server. It can be used inside shell scripts
and other programs that need UPS data but don't want to include the full interface

The upsmon client enables servers that draw power through the UPS to shutdown gracefully when the
battery power reaches critical

There are also logging clients ( upslog ) and third party interface clients (Big Sister, Cacti, Nagios,
Windows and more. Refer www.networkupstools.org/client-projects .)

The latest release of NUT (2.4) also controls PDU systems. It can do this either natively using SNMP or through a
binding to Powerman (open source software from Livermore Labs that also is embedded in Opengear console
servers )
These NUT clients and servers all are embedded in each Opengear console server (with a Management Console
presentation layer added) … and they also are run remotely on distributed
console servers and other remote NUT
monitoring systems. This layered distributed NUT architecture enables:

Multiple manufacturer support: NUT can monitor UPS models from 79 different manufacturers - and PDUs from a
growing number of vendors - with a unified interface

Multiple architecture support: NUT can manage serial and USB connected UPS models with the same common
interface. Network connected USB and PDU equipment can also be monitored using SNMP

Multiple clients monitoring the one UPS: Multiple systems may monitor a single UPS using only their network
connections and there's a wide selection of client programs which support monitoring UPS hardware via NUT (Big
Sister, Cacti, Nagios and more)

Central management of multiple NUT servers: A central NUT client can monitor multiple NUT servers that may be
distributed throughout the data center, across a campus or around the world
NUT supports the more complex power architectures found in data centers, communications centers and distributed office
environments where many UPSes from many vendors power many systems with many clients - and each of the larger
UPSes power multiple devices - and many of these devices are in turn dual powered