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1.linux-node2节点安装数据库
[root@linux-node2 ~]# yum install -y mariadb-server [root@linux-node2 ~]# systemctl start mariadb [root@linux-node2 ~]# netstat -tulnp |grep 3306 tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 41299/mysqld
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2.Zabbix添加数据库主机监控
被动模式对Hostname没要求，但主动模式必须与主机Hostname一致。
"Configuration"-->"Host"（填入主机信息）-->"Templates"（链接MySQL模板）
如图：
创建成功后，可以查看到MySQL相应的监控信息，数据库的增改删查，如图：
命令行进行查看获取的信息： [root@linux-node1 ~]# zabbix_get -s linux-node2 -k mysql.status[Com_begin] 0 [root@linux-node1 ~]# zabbix_get -s linux-node2 -k mysql.status[Slow_queries] 0 数据库模板监控配置主要来自linux-node2节点：/etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf 的配置 [root@linux-node2 ~]# vim /etc/zabbix/zabbix_agentd.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}' #mysql的状态获取 # 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 #mysql的存活获取 UserParameter=mysql.version,mysql -V #mysql的版本获取
- 3.带密码对MySQL监控
以上对数据库的监控，都是没有密码直接获取值，这是不合理的，那么需要如何添加密码进行获取监控数据呢？
（1）先对数据库进行授权和密码，通过zabbix用户进行获取数据，此处的授权由于试验，就授权了全部权限，正式生产时不能这样设置。 [root@linux-node2 ~]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 711 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> grant all on *.* to zabbix@localhost identified by "zabbix"; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> quit; Bye （2）修改监控配置，添加用户名密码 [root@linux-node2 ~]# vim /etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf UserParameter=mysql.status[*],echo "show global status where Variable_name='$1';" | HOME=/var/lib/zabbix mysql -uzabbix -pzabbix -N | awk '{print $$2}' 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 -uzabbix -pzabbix | grep -c alive UserParameter=mysql.version,mysql -V [root@linux-node2 ~]# systemctl restart zabbix-agent
修改完毕后，我们可以看到在Item项都显示Not supported，如图：
此时修改一下zabbix对无效监控项的刷新时间，默认是600s，我们改为30s。修改完成后就会变成enabled
"Administration"-->"General"-->右上角选择"other"-->"Refresh unsupported items (in sec)"改为30
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4.灵活使用宏变量（Macrros）进行传参配置用户名密码监控
如图：在主机中配置变量
（1）修改配置文件： [root@linux-node2 ~]# vim /etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf UserParameter=mysql.status[*],echo "show global status where Variable_name='$3';" | HOME=/var/lib/zabbix mysql -u$1 -p$2 -N | awk '{print $$2}' UserParameter=mysql.ping[*],HOME=/var/lib/zabbix mysqladmin -u$1 -p$2 ping| grep -c alive [root@linux-node2 ~]# systemctl restart zabbix-agent 此时，如果未传入用户名密码访问是被拒绝的： [root@linux-node1 ~]# zabbix_get -s linux-node2 -k mysql.status[Slow_queries] Enter password: ERROR 1045 (28000): Access denied for user 'Slow_queries'@'localhost' (using password: YES) [root@linux-node1 ~]# zabbix_get -s linux-node2 -k mysql.status[zabbix,zabbix,Slow_queries] 0 （2）修改模板，模板中的变量值可以不设置，因为在连接模板时进行修改变量，此时会自动覆盖在模板设置的变量值:
（3）修改模板中的Item：增加传参的变量{$USER},{PASSWD}
