MONITOR MYSQL/MARIADB SỬ DỤNG ZABBIX SERVER

Setup a MySql/MariaDB Monitoring User:

root@web01:~# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.17-0ubuntu0.16.04.1 (Ubuntu)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> create user 'zabbix_admin'@'localhost' IDENTIFIED BY 'Password';
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT USAGE ON *.* TO 'zabbix_admin'@'localhost' IDENTIFIED BY 'Password';
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye

Configure Zabbix Agent

– To monitor MySql / MariaDB we have to create a file called userparameter_mysql.conf in /etc/zabbix/zabbix_agentd.conf.d, will it be used to collect data:

root@web01:~# vi /etc/zabbix/zabbix_agentd.conf.d/userparameter_mysql.conf

– Add this lines

 # For all the following commands HOME should be set to the directory that has .my.cnf file with password information.
#
# Flexible parameter to grab global variables. On the frontend side, use keys like mysql.status[Com_insert].
# Key syntax is mysql.status[variable].
UserParameter=mysql.status[*],echo "show global status where Variable_name='$1';" | HOME=/etc/zabbix mysql -N | awk '{print $$2}' # My line
#
# Flexible parameter to determine database or table size. On the frontend side, use keys like mysql.size[zabbix,history,data].
# Key syntax is mysql.size[<database>,<table>,<type>].
# Database may be a database name or "all". Default is "all".
# Table may be a table name or "all". Default is "all".
# Type may be "data", "index", "free" or "both". Both is a sum of data and index. Default is "both".
# Database is mandatory if a table is specified. Type may be specified always.
# Returns value in bytes.
# 'sum' on data_length or index_length alone needed when we are getting this information for whole database instead of a single table
UserParameter=mysql.size[*],echo "select sum($(case "$3" in both|"") echo "data_length+index_length";; data|index) echo "$3_length";; free) echo "data_free";; esac)) from information_schema.tables$([[$
#
#Default below
UserParameter=mysql.ping,HOME=/etc/zabbix mysqladmin ping | grep -c alive 
#
#My line
UserParameter=mysql.uptime,HOME=/etc/zabbix mysqladmin status | cut -f2 -d ":" | cut -f1 -d "T" | tr -d " "
UserParameter=mysql.threads,HOME=/etc/zabbix mysqladmin status | cut -f3 -d ":" | cut -f1 -d "Q" | tr -d " "
UserParameter=mysql.questions,HOME=/etc/zabbix mysqladmin status | cut -f4 -d ":"|cut -f1 -d "S" | tr -d " "
UserParameter=mysql.slowqueries,HOME=/etc/zabbix mysqladmin status | cut -f5 -d ":" | cut -f1 -d "O" | tr -d " "
UserParameter=mysql.qps,HOME=/etc/zabbix mysqladmin status | cut -f9 -d ":" | tr -d " "
UserParameter=mysql.version,mysql -V

Next, we need to give Zabbix the login information for our new user. Create a file called .my.cnf in /etc/zabbix and fill it with these lines:

root@web01:~# vi /etc/zabbix/.my.cnf
#
[mysql]
user=zabbix_admin
password=Password
[mysqladmin]
user=zabbix_admin
password=Password

ADD line to /etc/zabbix/zabbix_agentd.conf
Include=/etc/zabbix/zabbix_agentd.conf.d/*.conf

Open : /root/zabbix-3.0.0/conf/zabbix_agentd/userparameter_mysql.conf

Correct line : UserParameter=mysql.ping,HOME=/var/lib//zabbix mysqladmin ping | grep -c alive

to UserParameter=mysql.ping,HOME=/etc/zabbix mysqladmin ping | grep -c alive

– Restart the zabbix agent service using the following command:

root@web01:~# systemctl restart zabbix-agent