Zabbix自带模板监控MySQL

zabbix有内置的模板，不过需要修改下配置，配置文件路径在：

[root@localhost ~]# cd /etc/zabbix/
[root@localhost zabbix]# ls
web  zabbix_agentd.conf  zabbix_agentd.d  zabbix_server.conf  zabbix_server.conf_bak
[root@localhost zabbix]# ll zabbix_agentd.d/userparameter_mysql.conf 
-rw-r--r--. 1 root root 1531 Dec 27  2017 zabbix_agentd.d/userparameter_mysql.conf
[root@localhost zabbix]# 

配置文件里需要：

1、修改HOME路径，创建.my.cnf文件。

2、mysql和mysqladmin需要改成绝对路径

# 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 "$3_length";; free) echo "data_free";; esac)) from inform
ation_schema.tables$([[ "$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

.my.cnf

[root@localhost zabbix]# pwd
/etc/zabbix
[root@localhost zabbix]# cat .my.cnf 
[mysql]
host=localhost
user=zabbix
password=123456

[mysqladmin]
host=localhost
user=zabbix
password=123456

正常情况需要创建一个zabbix用户，限定权限，供zabbix-server调用，不过我这里监控的是zabbix-server在的数据库，用户是现成的。

UserParameter=mysql.status[*],echo "show global status where Variable_name='$1';" | HOME=/etc/zabbix  /usr/bin/mysql -N | awk '{print $$2}'
UserParameter=mysql.size[*],bash -c 'echo "select sum($(case "$3" in both|"") echo "data_length+index_length";; data|index) echo "$3_length";; free) echo "data_free";; esac)) from inform
ation_schema.tables$([[ "$1" = "all" || ! "$1" ]] || echo " where table_schema="$1"")$([[ "$2" = "all" || ! "$2" ]] || echo "and table_name="$2"");" | HOME=/etc/zabbix /usr/bin/mysql
 -N'

UserParameter=mysql.ping,HOME=/etc/zabbix /usr/bin/mysqladmin ping | grep -c alive
UserParameter=mysql.version,mysql -V

mysql和mysqladmin路径可以通过whereis查看

[root@localhost ~]# whereis mysql
mysql: /usr/bin/mysql /usr/lib/mysql /usr/lib64/mysql /usr/include/mysql /usr/local/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz
[root@localhost ~]# whereis mysqladmin
mysqladmin: /usr/bin/mysqladmin /usr/share/man/man1/mysqladmin.1.gz

修改完毕，记得重启zabbix-agent

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