. If you want to change this option when state retention is active (and the use_retained_program_state is enabled), you'll have to use the appropriate external command or change it via the web interface. This option determines what type of information Nagios should write to the debug_file. Initial service and host states are normally only logged when there is a problem on the first check. Useful if you have multiple instances of Nagios that need to run from the same server, but have different local times associated with them. Popular Configuration Tools. Before moving forward, it is required to have basic concepts of Nagios Core 4. This can cause service checks to stop being executed. Fixed duplicate properties appearing in statusjson.cgi (#718) (Sebastian Wolf) 3. This options determines the maximum age in seconds that Nagios will consider check result files found in the check_result_path directory to be valid. Learn the basics of functioning the Core Config Manager in Nagios XI, a powerful tool that manages your configuration files for Nagios Core. The command argument is the short name of a command that you define in your object configuration file. More information on how predictive checks work can be found here. The main configuration file is usually named nagios.cfg and located in the /usr/local/nagios/etc/ directory. A value of 0 indicates that the performance data file should not be processed at regular intervals. This is where you're going to want to get started in your configuration adventures. Step 4: Download and install Nagios core. Too high of a value for this option may result in (temporarily) inaccurate host states, while a low value may result in a performance hit for host checks. If a service check runs longer than this limit, Nagios will kill it off thinking it is a runaway processes. This is the maximum number of seconds that Nagios will allow notification commands to be run. More information on how to estimate how many concurrent checks you should allow can be found here. Documentation for the CGI configuration file can be found here. This value determines whether or not Nagios will process host and service check performance data. There is often widespread confusion as to what this option really does. This is designed to allow for maximum flexibility with a variety of administrator’s setups. This is the pager number (or pager email gateway) for the administrator of the local machine (i.e. This is used to set the effective user that the Nagios process should run as. This directive is used to specify an event broker module that should by loaded by Nagios at startup. ), d = Use a "dumb" delay of 1 second between host checks, s = Use a "smart" delay calculation to spread host checks out evenly (default), 0 = Don't use aggressive host checking (default), 0 = Passive host checks are HARD (default), 0 = Don't make macros available as environment variables, 1 = Make macros available as environment variables (default), 0 = Don't enable flap detection (default), 0 = Don't use soft state dependencies (default), 0 = Don't process performance data (default), p = Open in non-blocking read/write mode (useful when writing to pipes), 0 = Don't check for orphaned service checks, 1 = Check for orphaned service checks (default), 1 = Check for orphaned host checks (default), 0 = Don't use regular expression matching (default), 0 = Don't use true regular expression matching (default), # = See BROKER_* definitions in source code (include/broker.h) for other values that can be OR'ed together, Shutdown Nagios, replace the module file, restart Nagios, While Nagios is running... delete the original module file, move the new module file into place, restart Nagios. Fellow Of The Royal Academy Of Engineering,
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