Nine --- Zabbix Zabbix monitoring mysq database

Real one: the plug-in percona database monitoring mariadb

1, environment preparation:

node1: 192.168.7.101 master-mysql primary database

node2: 192.168.7.102 slave-mysql from database

node4: 192.168.7.104 zabbix-proxy server

(1) from the master database zabbix-agent are required to install

# yum install zabbix-agent  -y

(2) node4 host to install package zabbix-proxy-mysql

# yum install zabbix-proxy-mysql  -y

2, from a master installation configuration database

(1) mounted on mariadb-server database host node1 and node2

# yum install mariadb-server  -y

(2) configuring the master database mariadb: /etc/my.cnf　

[mysqld]
socket=/var/lib/mysql/mysql.sock
user=mysql
symbolic-links=0
datadir=/data/mysql
innodb_file_per_table=1
relay-log = /data/mysql
server-id=101
log-bin=/data/mysql/master-log

Create a directory to store database:

# mkdir /data/mysql -p
# chown -R mysql.mysql  /data/mysql

(3) Start mariadb primary server database

# systemctl start mariadb

(4) mariadb configuration from the database server: vim /etc/my.cnf

[mysqld]
socket=/var/lib/mysql/mysql.sock
user=mysql
symbolic-links=0
datadir=/data/mysql
innodb_file_per_table=1
relay-log = /data/mysql
server-id=102
log-bin=/data/mysql/master-log

Create a directory to store database:

# mkdir /data/mysql -p
# chown -R mysql.mysql  /data/mysql

(5) starting from the server's database

# systemctl start mariadb

(6) (node1) create linux database on the primary server, and authorized

[root@node1 ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 11
Server version: 10.3.10-MariaDB-log MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

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

MariaDB [(none)]> create database linux; # 创建linux数据库
MariaDB [(none)]> GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO 'linux'@'192.168.7.%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.003 sec)

(7) a database the backup data in the primary server, and exported to the / opt directory　

[root@node1 ~]# mysqldump -A -F --single-transaction --master-data=1 > /opt/backup.sql

(8) out of backup.sql backup data to the database (master on node2) from　　

[root@node1 ~]# scp /opt/backup.sql  192.168.7.102:/opt

(9) View master database passed from the initial name of the binary log database: vim /opt/backup.sql

(10) from the server on the data transmitted from the server /opt/backup.sql

[root @ node2 ~] # MySQL </opt/backup.sql 
[root @ node2 ~] # # into the MySQL database 
is available for purchase at The MariaDB to Monitor Commands End with; or \ G.. 
Your MariaDB Connection the above mentioned id IS 3 
Server Version: 5.5 Server-MariaDB MariaDB .64 

Copyright (C) 2000, 2018, the Oracle, and Others Ab MariaDB Corporation. 

the Type 'Help;'. or '\ H' Help for the Type '\ C' to Clear The Current INPUT Statement. 

MariaDB [( none)]> show databases; # linux database information into view at this time has been imported into the database. 
+ -------------------- + 
| Database | 
+ -------------------- + 
| information_schema | 
| Linux | 
| MySQL | 
| performance_schema | 
| the Test |  
+ -------------------- +
5 in the SET rows (0.00 sec)
MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST = '192.168.7.101', MASTER_USER = 'linux', MASTER_PASSWORD = '123456', MASTER_PORT = 3306, MASTER_LOG_FILE = 'mysql-bin.000001', MASTER_LOG_POS = 342; # synchronization from the master database, copying begins mysql-bin.000001, the file size is 342 
MariaDB [(none)]> Slave start; # start copying the primary information database 
Query the OK, 0 rows affected (0.00 sec) 

MariaDB [(none)]> show slave status \ G; # Check that the status 
*************************** 1. row ******** ******************* 
Slave_IO_State: Waiting for Master to the send Event 
MASTER_HOST: 192.168.7.101 
MASTER_USER: Linux 
MASTER_PORT: 3306 
Connect_Retry: 60 
Master_Log_File: MySQL-bin.000001 
Read_Master_Log_Pos: 385  
Relay_Log_File: node2-Relay-bin.000002
RELAY_LOG_POS: 583 
Relay_Master_Log_File: MySQL-bin.000001
Slave_IO_Running: Yes  # 两个为yes，说明正常。
Slave_SQL_Running: Yes
Replicate_Do_DB: 
Replicate_Ignore_DB: 
Replicate_Do_Table: 
Replicate_Ignore_Table: 
Replicate_Wild_Do_Table: 
Replicate_Wild_Ignore_Table: 
Last_Errno: 0
Last_Error: 
Skip_Counter: 0
Exec_Master_Log_Pos: 385
Relay_Log_Space: 877
Until_Condition: None
Until_Log_File: 
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File: 
Master_SSL_CA_Path: 
Master_SSL_Cert: 
Master_SSL_Cipher: 
Master_SSL_Key: 
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error: 
Last_SQL_Errno: 0
Last_SQL_Error: 
Replicate_Ignore_Server_Ids: 
Master_Server_Id: 1

From this point of view the main IO and SQL are running status to yes, explain normal.

3, the official website to download percona zabbix Monitoring Plug

Download the official website address: https: //www.percona.com/downloads/

The official document: https: //www.percona.com/doc/percona-monitoring-plugins/LATEST/zabbix/index.html

Installation Tutorial: https: //www.percona.com/doc/percona-monitoring-plugins/LATEST/zabbix/index.html#installation-instructions

(1) Enter the official website of course, and then select the zabbix Percona Monitoring Plug

(2) select the latest version, and choose centos7 system, and then copy percona associated plug-in package of zabbix link, download and install it on linux

(3) in (on the server) to start the download percona associated plug-ins on linux system zabbix

[root@node2 ~]# wget https://www.percona.com/downloads/percona-monitoring-plugins/percona-monitoring-plugins-1.1.8/binary/redhat/7/x86_64/percona-zabbix-templates-1.1.8-1.noarch.rpm
--2020-02-25 21:11:12--  https://www.percona.com/downloads/percona-monitoring-plugins/percona-monitoring-plugins-1.1.8/binary/redhat/7/x86_64/percona-zabbix-templates-1.1.8-1.noarch.rpm
Resolving www.percona.com (www.percona.com)... 74.121.199.234
Connecting to www.percona.com (www.percona.com)|74.121.199.234|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 28296 (28K) [application/x-redhat-package-manager]
Saving to: ‘percona-zabbix-templates-1.1.8-1.noarch.rpm’

100%[=======================================================================================================>] 28,296      38.0KB/s   in 0.7s   

2020-02-25 21:11:25 (38.0 KB/s) - ‘percona-zabbix-templates-1.1.8-1.noarch.rpm’ saved [28296/28296]

（4）在从服务器上安装percona关联的zabbix插件

[root@node2 ~]# rpm -ivh percona-zabbix-templates-1.1.8-1.noarch.rpm 
warning: percona-zabbix-templates-1.1.8-1.noarch.rpm: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:percona-zabbix-templates-1.1.8-1 ################################# [100%]

Scripts are installed to /var/lib/zabbix/percona/scripts
Templates are installed to /var/lib/zabbix/percona/templates

（5）在从服务器上复制percona的zabbix插件模板

[root@node2 ~]# cp /var/lib/zabbix/percona/templates/userparameter_percona_mysql.conf  /etc/zabbix/zabbix_agentd.d/

（6）配置从服务器的/etc/zabbix/zabbix_agentd.conf文件

Server=192.168.7.100,192.168.7.104 # zabbix server服务器端的IP地址和主动模式代理服务器的IP地址
ServerActive=192.168.7.104 # 代理服务器的IP地址
Hostname=192.168.7.102  # 从服务器的IP地址

（7）重启zabbix-agent服务： systemctl restart zabbix-agent

（8）新建一个配置文件：/var/lib/zabbix/percona/scripts/ss_get_mysql_stats.php.cnf

<?php
$mysql_user= 'root';
$mysql_pass= '';

（9）在从服务器上安装php和php-mysql包

# yum install php  php-mysql  -y

（10）用脚本测试页面是否会显示数据，如果显示数据，说明正确

[root@node2 ~]# /var/lib/zabbix/percona/scripts/get_mysql_stats_wrapper.sh gg
5599

（11）在从服务器验证完之后，因此测试的文件是root执行生成的文件，此时在zabbix-server服务器端验证就会获取不到数据，所以必须删除脚本测试的临时文件，临时文件在/tmp/目录下。

[root@node2 ~]# rm -rf /tmp/localhost-mysql_cacti_stats.txt

（12）在zabbix-server服务器端获取数据

[root@zabbix ~]# zabbix_get  -s 192.168.7.102 -p 10050 -k "MySQL.Key-read-requests"
5599

（13）此时在从服务器上查看/tmp临时目录下的文件，就会创建以zabbix用户创建的文件

[root@node2 ~]# ll /tmp/localhost-mysql_cacti_stats.txt 
-rw-rw-r-- 1 zabbix zabbix 1237 Feb 25 22:09 /tmp/localhost-mysql_cacti_stats.txt

在zabbix网页上创建Percona模板

（1）导入自制的Percona模板

（2）将主机关联到前面创建的主动模式的proxy代理服务器node4上

（3）关联Percon模板

（4）将percona模板的监控项被动模式改为主动模式

（5）此时可以看到从服务器的主机的zabbix-agent变绿了

（6）查看此时监控的结果

实战二：自定义监控项监控数据库

在从服务器上创建检查主从同步自定义监控脚本

（1）在从服务器上/etc/zabbix/zabbix_agentd.d/目录下创建脚本，调用脚本查看返回的值，脚本名称为mysql_monitor.sh

#!/bin/bash
Seconds_Behind_Master(){
        NUM=`mysql -uroot -hlocalhost   -e "show slave status\G;"  | grep "Seconds_Behind_Master:" | awk -F: '{print $2}'`
        echo $NUM
}

master_slave_check(){
NUM1=`mysql -uroot -hlocalhost   -e "show slave status\G;"  | grep "Slave_IO_Running" | awk -F:  '{print $2}' | sed 's/^[ \t]*//g'`
#echo $NUM1
NUM2=`mysql -uroot -hlocalhost   -e "show slave status\G;"  | grep "Slave_SQL_Running:" | awk -F:  '{print $2}' | sed 's/^[ \t]*//g'`
#echo $NUM2
if test $NUM1 == "Yes" &&  test $NUM2 == "Yes";then
    echo 50
else
    echo 100
fi
}

main(){
    case $1 in
        Seconds_Behind_Master)
           Seconds_Behind_Master;
           ;;
        master_slave_check)
           master_slave_check
           ;;
    esac
}
main $1

（2）验证脚本返回值，检查返回为50，时延返回为0，说明没问题。

[root@node2 zabbix_agentd.d]# bash mysql_monitor.sh  master_slave_check
50
[root@node2 zabbix_agentd.d]# bash mysql_monitor.sh  Seconds_Behind_Master
0

（3）将mysql_monitor.sh加上执行权限

# chomd +x mysql_monitor.sh

（4）创建一个调用脚本的文件：vim /etc/zabbix/zabbix_agentd.d/mysql_monitor.conf

UserParameter=mysql_monitor[*],/etc/zabbix/zabbix_agentd.d/mysql_monitor.sh $1

（5）重启zabbix-agent服务，并在zabbix-server服务器端验证返回效果：systemctl restart zabbix-agent 　　

（6）在zabbix-server服务器端进行验证此时的脚本返回值，和在服务器上返回一致。

[root@zabbix ~]# zabbix_get -s 192.168.7.102 -p 10050 -k "mysql_monitor[master_slave_check]"
50
[root@zabbix ~]# zabbix_get -s 192.168.7.102 -p 10050 -k "mysql_monitor[Seconds_Behind_Master]"
0