Nagios Support Forum

benjaminsmith wrote:Hi Sib,

Let's do a full restart of the Nagios XI stack, this should get your monitoring engine running again. If not, let me know. Open up a shell on the XI server as root and run the following commands:

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systemctl stop crond
systemctl stop npcd
systemctl stop nagios
pkill -9 -u nagios
rm -rf /usr/local/nagiosxi/var/dbmaint.lock
rm -rf /usr/local/nagiosxi/var/event_handler.lock
rm -rf /usr/local/nagiosxi/scripts/reconfigure_nagios.lock
systemctl restart mysqld || systemctl restart mariadb
systemctl start nagios
systemctl start npcd
systemctl start crond
systemctl restart httpd

If you are still having trouble with check results coming in, please send over your system profile and we'll review the logs for you.

Benjamin

To send us your system profile.
Login to the Nagios XI GUI using a web browser.
Click the "Admin" > "System Profile" Menu
Click the "Download Profile" button
Save the profile.zip file and share in a private message or upload it to the post/ticket, and then reply to this post to bring it up in the queue.

[core:notice] [pid 13868] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0

systemctl stop crond
systemctl stop npcd
systemctl stop nagios
pkill -9 -u nagios
rm -rf /usr/local/nagiosxi/var/dbmaint.lock
rm -rf /usr/local/nagiosxi/var/event_handler.lock
rm -rf /usr/local/nagiosxi/scripts/reconfigure_nagios.lock
systemctl restart mysqld || systemctl restart mariadb
systemctl start nagios
systemctl start npcd
systemctl start crond
systemctl restart httpd

benjaminsmith wrote:Hi @Sib,
It looks like you have enabled SELinux on this system and Nagios XI is not compatible with that configuration.

[core:notice] [pid 13868] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0

Can you disabled SELinux on this server, and then do a full restart and let me know if the issue is resolved.

Nagios XI Restart

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systemctl stop crond
systemctl stop npcd
systemctl stop nagios
pkill -9 -u nagios
rm -rf /usr/local/nagiosxi/var/dbmaint.lock
rm -rf /usr/local/nagiosxi/var/event_handler.lock
rm -rf /usr/local/nagiosxi/scripts/reconfigure_nagios.lock
systemctl restart mysqld || systemctl restart mariadb
systemctl start nagios
systemctl start npcd
systemctl start crond
systemctl restart httpd

See: 5.4.2. DISABLING SELINUX

If i add new host in Core Config Manager and apply configuration its not showing up in GUI at all

200807 10:48:29 [ERROR] mysqld: Out of memory (Needed 128917504 bytes)

mysqlcheck -f -r -u root -pnagiosxi --all-databases --use_frm

cat /etc/my.cnf

benjaminsmith wrote:Hi @Sib,

If i add new host in Core Config Manager and apply configuration its not showing up in GUI at all

Just to clarify this particular issue, when you add the new host, are you able to find the host in the CCM? Also, what operating system are you using?

I noticed in the database log that the MySQL had recently run out of memory.

200807 10:48:29 [ERROR] mysqld: Out of memory (Needed 128917504 bytes)

Please log in as root and run the following check and repair command.

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mysqlcheck -f -r -u root -pnagiosxi --all-databases --use_frm

Can you post the MySQL configuration file.

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cat /etc/my.cnf

Let me know if you notice any improvement after running the db repair script. If you're still having issues with check results not updating, it maybe necessary to downgrade the backend database to the previous version.