zabbix監控之mysql主從狀態&mysql主從延遲

1、監控mysql主從狀態

一、環境說明：

主機	IP	應用與系統版本
主數據庫	192.168.56.22	centos7/redhat7 mysql-5.7
從數據庫	192.168.56.20	centos7/redhat7 mysql-5.7
zabbix服務器	192.168.56.23	centos7/redhat7

二、mysql安裝

安裝主服務器（192.168.56.20）

//解壓安裝包至/usr/local下 [root@20liuzhenchao ~]# tar xf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz -C /usr/local/ //建立用戶和組 [root@20liuzhenchao ~]# groupadd -r mysql [root@20liuzhenchao ~]# useradd -M -s /sbin/nologin -g mysql mysql //建立軟連接並修改/usr/local/mysql目錄屬組 [root@20liuzhenchao local]# ln -sv mysql-5.7.22-linux-glibc2.12-x86_64/ mysql "mysql" -> "mysql-5.7.22-linux-glibc2.12-x86_64/" [root@20liuzhenchao local]# chown -R mysql.mysql mysql* [root@20liuzhenchao local]# ll |grep mysql lrwxrwxrwx 1 mysql mysql 36 5月 15 22:55 mysql -> mysql-5.7.22-linux-glibc2.12-x86_64/ drwxr-xr-x 9 mysql mysql 129 5月 15 22:46 mysql-5.7.22-linux-glibc2.12-x86_64 //添加環境變量 [root@20liuzhenchao local]# echo 'export PATH=/usr/local/mysql/bin:$PATH' > /etc/profile.d/mysql.sh [root@20liuzhenchao local]# . /etc/profile.d/mysql.sh //創建數據存放目錄 [root@20liuzhenchao ~]# mkdir /opt/data [root@20liuzhenchao ~]# chown -R mysql.mysql /opt/data [root@20liuzhenchao ~]# ll /opt/data -d drwxr-xr-x 2 mysql mysql 6 5月 15 23:02 /opt/data //初始化數據庫 [root@20liuzhenchao ~]# mysqld --initialize --user=mysql --datadir=/opt/data 2019-05-15T15:04:16.463631Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2019-05-15T15:04:16.837927Z 0 [Warning] InnoDB: New log files created, LSN=45790 2019-05-15T15:04:16.899304Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2019-05-15T15:04:17.011781Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: b58e7a1c-7722-11e9-b5d5-000c29fc116c. 2019-05-15T15:04:17.012413Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2019-05-15T15:04:17.013201Z 1 [Note] A temporary password is generated for root@localhost: e88-hL,1?YRT//此處臨時密碼爲:e88-hL,1?YRT //修改配置文件 [root@20liuzhenchao ~]# vim /etc/my.cnf [mysqld] datadir=/opt/data socket=/tmp/mysql.sock //配置服務啓動腳本 [root@20liuzhenchao ~]# cp -a /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld [root@20liuzhenchao ~]# sed -ri 's#^(basedir=).*#\1/usr/local/mysql#g' /etc/init.d/mysqld [root@20liuzhenchao ~]# sed -ri 's#^(datadir=).*#\1/opt/data#g' /etc/init.d/mysqld //啓動mysql [root@20liuzhenchao ~]# service mysqld start Starting MySQL. SUCCESS! [root@20liuzhenchao ~]# ss -antl|grep 3306 LISTEN 0 80 :::3306 :::* //修改密碼 [root@20liuzhenchao ~]# mysql -uroot -p'e88-hL,1?YRT' -e 'set password=password("liu123!");' --connect-expired-password mysql: [Warning] Using a password on the command line interface can be insecure.

從服務器（192.168.56.22）上mysql的安裝略，與上同 

三、mysql主從配置

//在主數據庫裏（192.168.56.22）建立一個同步帳號受權給從數據庫（192.168.56.20）使用 mysql> create user 'repl'@'192.168.56.20' identified by 'liu123!'; Query OK, 0 rows affected (0.00 sec) mysql> grant replication slave on *.* to 'repl'@'192.168.56.20'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) //配置主數據庫 [root@22liuzhenchao ~]# vim /etc/my.cnf [mysqld] server-id=1 //添加 log-bin=mysql-bin //添加 //重啓mysql並查看主庫狀態 [root@22liuzhenchao ~]# service mysqld restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS! [root@22liuzhenchao ~]# mysql -uroot -p'liu123!' -e 'show master status' mysql: [Warning] Using a password on the command line interface can be insecure. +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000001 | 154 | | | | +------------------+----------+--------------+------------------+-------------------+ //配置從數據庫 [root@20liuzhenchao ~]# vim /etc/my.cnf [mysqld] basedir = /usr/local/mysql datadir = /opt/data socket = /tmp/mysql.sock port = 3306 pid-file = /opt/data/mysql.pid user = mysql server-id = 2 relay-log = mysql-relay-bin //重啓數據庫 [root@20liuzhenchao ~]# service mysqld restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS! //配置主從複製並查看狀態 mysql> change master to master_host='192.168.56.22',master_user='repl',master_password='liu123!',master_log_file='mysql-bin.000001',master_log_pos=154; Query OK, 0 rows affected, 2 warnings (2.23 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.56.22 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 154 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 320 Relay_Master_Log_File: mysql-bin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: .... ....

四、監控mysql主從狀態

1）監控主從狀態配置

//在從數據庫主機上添加監控用戶zabbix，並賦予權限 mysql> create user 'zabbix'@'localhost' identified by 'liu123!'; Query OK, 0 rows affected (0.00 sec) mysql> grant all on *.* to 'zabbix'@'localhost'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.01 sec) //在從庫上編輯zabbix-agent配置文件 [root@20liuzhenchao ~]# vim /usr/local/etc/zabbix_agentd.conf UserParameter=db_status,mysql -uzabbix -p'liu123!' -e "show slave status\G" 2>/dev/null|egrep 'Slave_IO_Running|Slave_SQL_Running'|grep -v 'Slave_SQL_Running_State'|awk '{print $NF}'|grep -c Yes //添加此行 //重啓zabbix_agentd服務 [root@20liuzhenchao ~]# pkill zabbix [root@20liuzhenchao ~]# zabbix_agentd //監控服務端測試 [root@zabbix ~]# zabbix_get -s 192.168.56.20 -k 'db_status' 2

2）zabbix服務端web配置

建立監控項

 

建立觸發器

 

手動測試

 

[root@20liuzhenchao ~]# mysql -uroot -p'liu123!' mysql> stop slave; Query OK, 0 rows affected (0.00 sec)

五、監控mysql主從延遲

1）//在從庫上編輯zabbix-agent配置文件

[root@20liuzhenchao ~]# vim /usr/local/etc/zabbix_agentd.conf UserParameter=db_delay,mysql -uzabbix -p'liu123!' -e "show slave status\G" 2>/dev/null|egrep 'Seconds_Behind_Master'|awk '{print $2}' //添加此行 //重啓zabbix_agentd服務 [root@20liuzhenchao ~]# pkill zabbix [root@20liuzhenchao ~]# zabbix_agentd //監控服務端測試 [root@zabbix ~]# zabbix_get -s 192.168.56.20 -k db_delay 0

2）zabbix服務端web配置

建立監控項

建立觸發器

手動測試

 

[root@20liuzhenchao ~]# mysql -uroot -p'liu123!' mysql> stop slave; Query OK, 0 rows affected (0.00 sec)

//這裏須要在主數據庫中插入或改變龐大數據才能觸發延遲，故這裏沒法測試告警