Nagios监控数据库的方法

Nagios监控数据库的方法：

check_mysql_health监控数据库

1、check_mysql_health安装

在监控服务器上安装

# cd /usr/local/src/tarbag

# wget http://labs.consol.de/wp-content/uploads/2010/03/check_mysql_health-2.1.1.tar.gz

# tar zxvf check_mysql_health-2.1.1.tar.gz -C ../software/

# ./configure \

–prefix=/usr/local/nagios/ \

–with-nagios-user=nagios \

–with-nagios-group=nagios \

–with-perl=/usr/bin/perl \

–with-statefiles-dir=/usr/local/nagios/var/tmp \

–with-perl perl\ 程序运行路径

–with-statefiles-dir 状态信息文件路径

# make

# make install

2、check_mysql_health选项

Options:

–hostname

the database server’s hostname

–port

the database’s port. (default: 3306)

–socket

the database’s unix socket.

–username

the mysql db user

–password

the mysql db user’s password

–database

the database’s name. (default: information_schema)

–warning

the warning range

–critical

the critical range

–mode

the mode of the plugin. select one of the following keywords:

connection-time 连接到服务器上的时间

uptime 服务器运行的时间

threads-connected 当前连接到数据库的连接数

threadcache-hitrate 线程缓存命中率

slave-lag slave落后master多少时间

slave-io-running slave复制是否正常

slave-sql-running slave复制是否正常

qcache-hitrate 查询缓存命中率

qcache-lowmem-prunes (Query cache entries pruned because of low memory)

keycache-hitrate (MyISAM key cache hitrate)

bufferpool-hitrate (InnoDB buffer pool hitrate)

bufferpool-wait-free (InnoDB buffer pool waits for clean page available)

log-waits (InnoDB log waits because of a too small log buffer)

tablecache-hitrate 表缓存命中率

table-lock-contention 表锁率

index-usage 索引使用情况

tmp-disk-tables (Percent of temp tables created on disk)

slow-queries 慢查询

long-running-procs 长时间运行的进程

cluster-ndbd-running ndb节点运行状况

sql 返回一个数字的任何SQL语句

3、check_mysql_health监控配置

监控服务器：10.59.97.42

MySQL数据授权：

在要监控的MySQL数据库服务器上

mysql> grant usage on *.* to [email protected] identified by “honyho@8123“;

mysql> flush privileges;

在监控服务器上

1》查看当前连接到数据库的连接数

#./check_mysql_health –hostname 10.59.97.57 –username honyho –password honyho@8123 –mode threads-connected

OK – 3 client connection threads | threads_connected=3;10;20

threads_connected=3;10;20

3表示连接数

10 表示warning阀值(默认)

20 表示critical阀值(默认)

Nagios相关配置

1》配置commands.cfg文件

define command{

command_name check_mysql_health

command_line $USER1$/check_mysql_health –hostname $ARG1$ –username $ARG2$ –password $ARG3$ –warning $ARG4$ –critical $ARG5$ –mode $ARG6$

}

2》配置121_207_231_17.cfg文件

define service{

use local-service

host_name 121.207.231.17

service_description threads-connected

check_command check_mysql_health!10.59.97.57!honyho!honyho@8123!1000!1500!threads-connected

}