Nagios Support Forum

Can you share the output of the following command executed from the CLI of your Nagios Core machine (using the host's logical address): ip addr /usr/local/nagios/libexec/check_nrpe -H 10.x.x.x Feel free to PM the results if they contain sensitive information. I'd like to be sure the Nagios Core mach...

Not really beyond parsing the logs. The unix timestamp is used by several processes on the back-end of Nagios Core, so altering the state of the log file to use an ISO 8601 timestamp or similar formats would need to be accounted for in several other components of Nagios Core, not just the log file.

Have you verified your host/service definitions include the appropriate settings for the contacts/contact_groups directive? Like so:

This is a limitation within how Nagios Core dispatches notifications. More info about how that works on the back-end: https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/notifications.html The decision to send out notifications is made in the service check and host check logic. The c...

Not currently. You can refer to the "Help" section of your Nagios XI GUI for more information about the back-end API. You could use the external commands file to schedule downtime from the CLI though. More information: https://old.nagios.org/developerinfo/externalcommands/commandlist.php T...

Just so we're on the same page, what agent are you using to retrieve the system metrics for this machine? NRPE, SNMP, NCPA, etc.

Can you show me the command definition being leveraged to check the machine's available memory?

Your configuration isn't retaining the program state:
Try switching that to 1 and see if it resolves the issue.

Can you share the full contents of your /usr/local/nagios/etc/nagios.cfg file? There may be a setting that's preventing retention.dat from being leveraged and resetting the monitoring engine' settings to default each time.

It looks as if Nagios Log Server as well as Nagios Network Analyzer have been installed on this machine: CORP root@nagios01:/var/log/httpd$ ls -al /var/www/html total 24 drwxr-xr-x. 5 root root 4096 Sep 8 12:53 . drwxr-xr-x. 7 root root 4096 Jan 5 21:57 .. -rwxr-xr-x. 1 root root 3038 Sep 19 2015 in...

I would need to see the full call trace from the RC server to determine if it's a "false negative" or not. I know check_selenium by itself will throw a "CRITICAL" if it finds the word "ERROR" anywhere in the test case's output, though I believe the RC server will re-try...