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Nagios central monitoring features
Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. The monitoring daemon runs intermittent checks on hosts and services you specify using external plugins which return status information to Nagios. Some of the major Nagios monitoring features are listed below:
- Monitoring of network services (SMTP, POP3, HTTP, NNTP, PING,
etc.)
- Monitoring of host resources (processor load, disk and memory
usage, running processes, log files, etc.)
- Monitoring of environmental factors such as temperature
- Simple plugin design that allows users to easily develop their
own host and service checks
- Ability to define network host hierarchy, allowing detection of
and distinction between hosts that are down and those that are
unreachable
- Contact notifications when service or host problems occur and
get resolved (via email, pager, or other user-defined method)
- Optional escalation of host and service notifications to
different contact groups
- Ability to define event handlers to be run during service or
host events for proactive problem resolution
- Support for implementing redundant and distributed monitoring
servers
- External command interface that allows on-the-fly modifications
to be made to the monitoring and notification
behavior through the use of event handlers, the web interface,
and third-party applications
- Retention of host and service status across program restarts
- Scheduled downtime for suppressing host and service
notifications during periods of planned outages
- Ability to acknowledge problems via the web interface
- Web interface for viewing current network status, notification
and problem history, log file, etc.
- Simple authorization scheme that allows you restrict what users
can see and do from the web interface
So while Nagios may take some time to configure and install, it does provide an outstanding host and network monitoring solution (and was voted 2007 Monitoring Application of the Year for 2007 by LinuxQuestions.org members). nagios.org also cites that Nagios is currently in use monitoring some 890,000 services and 195,000 hosts worldwide.
Opengear's SDT for Nagios extends these monitoring and alerts capabilities, by adding secure access and remote control.
You can find more Nagios details on:
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