This KB article is about the MySQL / MariaDB database and adjusting the STRICT_TRANS_TABLES setting.
As of [MySQL 5.7.5] and [MariaDB 10.2.4] the STRICT_TRANS_TABLES mode is enabled by default. When this is enabled it causes database changes to be rolled back if they do not meet strict requirements. This causes problems with Nagios XI and how it saves it's data to the database.
Nagios XI requires the STRICT_TRANS_TABLES to be disabled, this KB article instructs you on how to do this.
The steps in this KB article need to be applied to your database server. Normally this is your Nagios XI server however if you have offloaded the databases to an external server then the commands need to be executed on that server.
Change Setting
Establish a terminal session to your Nagios XI server and execute the following command to open the database client:
mysql -u root -pnagiosxi
Execute these command to determine if the setting is currently disabled:
use nagiosql;
SELECT @@SQL_MODE, @@GLOBAL.SQL_MODE\G;
The output will be something like this:
*************************** 1. row ***************************
@@SQL_MODE: STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
@@GLOBAL.SQL_MODE: STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
1 row in set (0.00 sec)
You can see from the output above that the setting STRICT_TRANS_TABLES exists, this means is it enabled.
To disable the setting execute the following commands:
SET @@SQL_MODE = REPLACE(@@SQL_MODE,'STRICT_TRANS_TABLES', '');
SET @@GLOBAL.SQL_MODE = REPLACE(@@GLOBAL.SQL_MODE,'STRICT_TRANS_TABLES', '');
SELECT @@SQL_MODE, @@GLOBAL.SQL_MODE\G;
The output should be something like:
MariaDB [nagiosql]> SET @@SQL_MODE = REPLACE(@@SQL_MODE,'STRICT_TRANS_TABLES', '');
Query OK, 0 rows affected (0.00 sec)
MariaDB [nagiosql]> SET @@GLOBAL.SQL_MODE = REPLACE(@@GLOBAL.SQL_MODE,'STRICT_TRANS_TABLES', '');
Query OK, 0 rows affected (0.00 sec)
MariaDB [nagiosql]> SELECT @@SQL_MODE, @@GLOBAL.SQL_MODE\G;
*************************** 1. row ***************************
@@SQL_MODE: ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
@@GLOBAL.SQL_MODE: ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
1 row in set (0.00 sec)
You can see from the output above that the STRICT_TRANS_TABLES setting no longer exists, this means it is disabled.
This completes the changes required to disable the STRICT_TRANS_TABLES setting. You can now exit the database client with:
quit;
You will also need to remove STRICT_TRANS_TABLES in the MySQL / MariaDB my.cnf configuration file.
The first step is to stop the required services on your Nagios XI server:
RHEL 7 - 8| CentOS 7 - 8 | Oracle Linux 7 | Debian | Ubuntu 16/18/20 | Centos Stream
systemctl stop nagios.service
systemctl stop ndo2db.service
The next step is to edit the my.cnf configuration file on your MySQL / MariaDB database server. Establish a terminal session to your database server and edit the my.cnf file by executing the following command:
RHEL7 | CentOS7 | Oracle Linux7
vi /etc/my.cnf
RHEL8 | CentOS8 | Centos Stream
vi /etc/my.cnf.d/mysql-server.cnf
Ubuntu 16/18/20
vi /etc/mysql/mysql.conf.d/mysqld.cnf
Debian 9
vi /etc/mysql/mariadb.conf.d/50-server.cnf
When using the vi editor, to make changes press i on the keyboard first to enter insert mode. Press Esc to exit insert mode.
Locate the [mysqld] section and locate the sql_mode already defined:
[mysqld]
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
Remove the STRICT_TRANS_TABLES in the line so it looks similar as follows:
[mysqld]
sql_mode=NO_ENGINE_SUBSTITUTION
When you have finished, save the changes in vi by typing:
:wq
and press Enter.
You now need to restart the database service:
RHEL 7 | CentOS 7 | Oracle Linux 7 | Debian 9
systemctl restart mariadb.service
RHEL 8 | CentOS 8 | Centos Stream
systemctl restart mysqld.service
Debian 8 | Ubuntu 16/18/20
systemctl restart mysql.service
You now need to start the Nagios services:
RHEL 7 | CentOS 7 | Oracle Linux 7 | Debian | Ubuntu 16/18/20
systemctl start ndo2db.service
systemctl start nagios.service
RHEL 8 | CentOS 8 | Centos Stream
systemctl start nagios.service
Final Thoughts
For any support related questions please visit the Nagios Support Forums at:
http://support.nagios.com/forum/
Article ID: 780
Created On: Thu, Nov 16, 2017 at 6:49 PM
Last Updated On: Fri, Mar 4, 2022 at 12:40 PM
Authored by: tlea
Online URL: https://support.nagios.com/kb/article/nagios-xi-strict_trans_tables-780.html