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Documentation |
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NodeWatch Documentation Source |
NodeWatchIntroductionNodeWatch is an open source TCP/IP network monitoring tool written in Perl for UNIX. It will watch, i.e. poll, a set of network nodes and react to node connectivity changes by making entries to the syslog and executing user defined commands. NodeWatch was written from the perspective of a network manager; it only keeps track of the node's ability to respond to ICMP echo request datagrams with ICMP echo reply datagrams. Key Features
Obtaining the SoftwareNodeWatch is available via HTTP. It requires Perl, version 5.6.1 or later. QuickPage makes a superb adjunct to NodeWatch's capabilities. Configuring NodeWatchSee the documentation page for a detailed discussion of how NodeWatch works and how to configure it. Default values are kept in the daemon itself. There is a configuration file, and if NodeWatch can't find it, then the defaults are used. Otherwise the values in the configuration file are used. Beyond the configuration file, there are three other files requiring configuration: the node database, the period database, and the action database. There is a description in the manual and hints in each database. Operating NodeWatchStarting NodeWatch is simple. Simply run it. It is a daemon, and doesn't recognize any command line arguments. It can receive signals to get it to produce some statistics. It will automatically recognize changes in configuration files, so there is no need to send it a signal to reload its configuration data. Companion SoftwareThere are several tools included in the distribution: nodewatch_up and n_status_watch. nodewatch_up makes sure that NodeWatch is running. n_status_watch monitors the syslog to make sure NodeWatch status messages are getting through. SupportThe foremost support is the manual page, comments in the configuration files, and the daemon itself. Also, the current maintainer, Stuart Kendrick, sbk {insert 'at' sign here} skendric {insert '.' here} com, will respond to queries, time permitting. FeedbackComments or questions regarding NodeWatch are welcome. Please direct feedback to the maintainer. AuthorsRon Hood wrote the first version of NodeWatch in 1994; the core design and principles remain his creation. In 1996, Patrick Ryan rewrote NodeWatch from scratch, adding many features. In the fall of 2000, Stuart Kendrick adopted the role of maintainer Referencemonitoring Lists monitors Notification Software |
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Prepared by: Stuart Kendrick Last modified: 19-Sep-2005 |