nagios 监控mysql（check_mysql_health插件）

nagios 监控mysql（check_mysql_health插件）

http://labs.consol.de/wp-content/uploads/2011/08/check_mysql_health-2.1.7.tar.gz

# mount /dev/cdrom /media/cdrom

# rpm -ivh /media/cdrom/Server/perl-DBI-1.52-2.el5.i386.rpm

# rpm -ivh /media/cdrom/Server/perl-DBD-MsSQL-3.0007-2.el5.i386.rpm --nodeps

# tar zxf check_mysql_health-2.1.7.tar.gz

# cd check_mysql_health-2.1.7

# ./configure

# make && make install

# mysql -u root -p123456

> grant all on *.* to ming@'localhost' identified by '123456';

> quit

注：让该用户有访问本地mysql的权限即可，可用mysql -u ming -p123456验证，权限不一定给all

方式一（localhost监控）：

# vi /usr/local/nagios/etc/objects/commands.cfg

define command{

command_name check_mysql_health

command_line $USER1$/check_mysql_health --hostname $ARG1$ --port $ARG2$ --username $ARG3$ --password $ARG4$ --mode $ARG5$

--warning $ARG6$ --critical $ARG7$

}
:wq

# vi /usr/local/nagios/etc/objects/localhost.cfg

define service{

use local-service ; Name of service template to use

host_name myhostname

service_description check_mysql_connections

check_command check_mysql_health!192.168.1.10!3306!ming!123456!threads-connected!700!1000

}

:wq

可先测试一下:

#./check_mysql_health --hostname 192.168.1.10 --port 3306 --username ming --password 123456 --mode threads-connected --warning 700 --critical 1000

注：在线程数（连接数）超过1000或无法连接时红灯报警，线程数在700以内0以上为绿灯，700到1000之间为黄灯。

方式二（nrpe监控）：

下面要借助于nrpe（nrpe安装步骤略）

# vi /usr/local/nagios/etc/nrpe.cfg
command[check_mysql]=/usr/local/nagios/libexec/check_mysql_health --hostname 192.168.1.10 --port 3306 --username ming --password 123456 --mode threads-connected --warning 700 --critical 1500

:wq

重启nrpe：

# killall nrpe

# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

# vi /usr/local/nagios/etc/objects/ming.cfg (ming.cfg为监控主机的文件，自建的)

define service{

use local-service ; Name of service template to use

host_name myhostname

service_description check_mysql

check_command check_nrpe!check_mysql

}

:wq

附：
利用check_mysql_health实现多种监控模式：
connection-time (Time to connect to the server)

uptime (Time the server is running)

threads-connected (Number of currently open connections)线程数

threadcache-hitrate (Hit rate of the thread-cache)慢查询

slave-lag (Seconds behind master)

slave-io-running (Slave io running: Yes)主从热备

slave-sql-running (Slave sql running: Yes)主从热备

qcache-hitrate (Query cache hitrate)

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 (Table cache hitrate)

table-lock-contention (Table lock contention)锁表率

index-usage (Usage of indices)

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

slow-queries (Slow queries)

long-running-procs (long running processes)

cluster-ndbd-running (ndnd nodes are up and running)

sql (any sql command returning a single number)