Nagios XI Failover Instance Generating Alerts With Nagios Service Disabled

[smithjor]

I am running the latest nagiosxi on Debian 12.

root@LANNAGIOSXI:~# cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

root@LANNAGIOSXI:~# /usr/local/nagios/bin/nagios -V
Nagios Core 4.5.13
Copyright (c) 2009-present Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 2026-04-14
License: GPL

root@LANNAGIOSXI:~# cat /usr/local/nagiosxi/var/xiversion
###################################
# DO NOT DELETE THIS FILE!
# Nagios XI version information
###################################
full=2026R1.5
major=2026R1
minor=5
releasedate=2026-05-27
release=80500
COMMIT_HASH=52ba6496


We are running this as a VM in Hyper-V. I recently cloned our VM to create a failover instance. I disabled the Nagios service on the failover VM however it is generating alert notices about monitored hosts being down.

I ran " systemctl stop nagios" and "systemctl disable nagios" to disable the service. Is there something else I need to disable?

-Jordan

[cdietsch]

Hi Jordan,

I would make sure that httpd/apache2, postfix, and the cron services are stopped as well.

Code: Select all

systemctl stop apache2
systemctl stop postfix
systemctl stop crond

I would also double check that the nagios service is stopped even though you issued the stop command:

Code: Select all

ps -ef | grep nagios
systemctl status nagios

[smithjor]

Cole,

Thanks for your response but it did not correct the issue. I reached out to nagios support they had me run SQL repair script and I also removed all old mail in my queue. For good measure I rebooted the server and now with only the nagios service disabled (I have it set to not start on boot) the mails are no longer coming.

/usr/local/nagiosxi/scripts/repair_crashed_databases.sh

(the debian server runs sendmail)

cd /var/spool/mqueue-client
rm-f qf* df* xf*

-Jordan

[DoubleDoubleA]

Thanks for posting the update!