通過zabbix官方模板監控mysql · Linux學習手冊

[TOC] # 通過zabbix官方模板監控mysql ## 準備環境 - 服務端：Linux CentOs7.2 192.168.0.62 - 客戶端：Linux CentOs7.2 192.168.0.62 - zabbix版本：4.0.1 LTS ## 客戶端 ### 1.為數據庫監控創建用戶生成環境上需要注意授權用戶可管理的數據庫，比如只能監控zabbix的庫 ``` mysql -uroot -p grant all on zabbix.* to 'zabbix'@'localhost' identified by 'zabbix'; flush privileges; ``` ### 2.創建.my.cnf文件 ``` vim /etc/zabbix/.my.cnf [client] user=zabbix host=127.0.0.1 password=zabbix ``` ### 3.修改userparameter_mysql.conf yum安裝的agent默認就存在該文件，路徑為 /etc/zabbix/zabbix_agentd.conf.d/userparameter_mysql.conf ``` # 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=/var/lib/zabbix mysql -N | awk '{print $$2}' # Flexible parameter to determine database or table size. On the frontend side, use keys like mysql.size[zabbix,history,data]. # Key syntax is mysql.size[<database>,<table>,<type>]. # Database may be a database name or "all". Default is "all". # Table may be a table name or "all". Default is "all". # Type may be "data", "index", "free" or "both". Both is a sum of data and index. Default is "both". # Database is mandatory if a table is specified. Type may be specified always. # Returns value in bytes. # 'sum' on data_length or index_length alone needed when we are getting this information for whole database instead of a single table UserParameter=mysql.size[*],bash -c 'echo "select sum($(case "$3" in both|"") echo "data_length+index_length";; data|index) echo "$3_length";; free) echo "data_free";; esac)) from information_schema.tables$([[ "$1" = "all" || ! "$1" ]] || echo " where table_schema=\"$1\"")$([[ "$2" = "all" || ! "$2" ]] || echo "and table_name=\"$2\"");" | HOME=/var/lib/zabbix mysql -N' UserParameter=mysql.ping,HOME=/var/lib/zabbix mysqladmin ping | grep -c alive UserParameter=mysql.version,mysql -V ``` 其中HOME=/var/lib/zabbix和yum安裝的路徑不符，需要修改成HOME=/etc/zabbix 所以修改后的文件為 ``` # For all the following commands HOME should be set to the directory that has .my.cnf file with password information. # Flexible parameter to grab global variables. On the frontend side, use keys like mysql.status[Com_insert]. # Key syntax is mysql.status[variable]. UserParameter=mysql.status[*],echo "show global status where Variable_name='$1';" | HOME=/etc/zabbix mysql -N | awk '{print $$2}' # 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[*],bash -c 'echo "select sum($(case "$3" in both|"") echo "data_length+index_length";; data|index) echo "$3_length";; free) echo "data_free";; esac)) from information_schema.tables$([[ "$1" = "all" || ! "$1" ]] || echo " where table_schema=\"$1\"")$([[ "$2" = "all" || ! "$2" ]] || echo "and table_name=\"$2\"");" | HOME=/etc/zabbix mysql -N' UserParameter=mysql.ping,HOME=/etc/zabbix mysqladmin ping | grep -c alive UserParameter=mysql.version,mysql -V ``` **生效需要重啟agent** ``` systemctl restart zabbix-agent ``` ### 測試執行情況 - 客戶端測試 ``` 先使用root賬戶執行 HOME=/etc/zabbix sudo mysqladmin ping | grep -c alive 1 再使用zabbix賬戶執行 sudo -u zabbix sudo HOME=/etc/zabbix mysqladmin ping | grep -c alive 1 如果出錯，一般都是zabbix權限不夠的問題，可以看后面的sudo權限提升 ``` - 服務端測試 ``` zabbix_get -s 192.168.0.131 -k "mysql.status[Bytes_sent]" 167002 ``` ## 服務端為目標主機添加模板鏈接Template DB MySQL ![https://i.loli.net/2019/09/19/7soFxbHnN2Bl8Vw.png](https://i.loli.net/2019/09/19/7soFxbHnN2Bl8Vw.png) 查看生成的圖形 ![https://i.loli.net/2019/09/19/kuvjBrQ5x2SR6hP.png](https://i.loli.net/2019/09/19/kuvjBrQ5x2SR6hP.png) ## sudo提升 > 默認普通用戶無法使用sudo > 需要修改/etc/sudoers文件，默認文件屬性為440 > -r--r-----. 1 root root 3972 Jul 14 16:03 /etc/sudoers 直接使用visudo修改如果你希望之后執行sudo命令時不需要輸入密碼，那么可以形如，注意修改行下需空一行，退出重新登錄后生效 ``` root ALL=(ALL) ALL zabbix ALL=(ALL) NOPASSWD:/var/lib/mysql/bin #可以無密碼使用mysqld restart命令 ``` 使用不同賬戶，執行執行腳本時候sudo經常會碰到 sudo: sorry, you must have a tty to run sudo這個情況，其實修改一下sudo的配置就好了 ``` 注釋掉 Default requiretty 一行 #Default requiretty ``` 意思就是sudo默認需要tty終端。注釋掉就可以在后臺執行了。要測試用戶權限是否生效可以使用 ``` sudo -u happy sudo /var/lib/zabbix/mysqld restart ```