nagios mysql_nagios监控mysql

本监控为基于nagios服务器主动监控方法，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)

具体步骤如下：

1、安装

#wget http://labs.consol.de/wp-content/uploads/2009/10/check_mysql_health-2.1.tar.gz

#tar -zxvf check_mysql_health-2.1.tar.gz

#cd check_mysql_health-2.1

#./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios --with-perl=/usr/bin/perl

#make && make install

2、命令测试

#cd /usr/local/nagios/libexec

#./check_mysql_health --hostname 192.168.0.1 --port 3306 --username myname --password mypassword --mode threads-connected --warning 700 --critical 1000

当出现Can't locate DBI.pm的错误时：

#yum install perl-DBI perl-DBD-MySQL -y

再次执行，结果如下：

OK - 607 client connection threads | threads_connected=607;700;1000

命令参数：

–hostname

Der Datenbankserver, der überwacht werden soll. Im Falle von "localhost" kann dieser Parameter weggelassen werden.

–username

Der Datenbankuser.

–password

Dessen Passwort.

–mode

Mit dem mode-Parameter teilt man dem Plugin mit, was es tun soll.

–name

Hier kann die Prüfung auf ein einziges Objekt begrenzt werden.

–name2

Verwendet man –mode=sql, dann erscheint das SQL-Statement in der Ausgabe und den Performancedaten.

–warning

–critical

–environment =

–method

Mit diesem Parameter teilt man dem Plugin mit, wie es sich zur Datenbank verbinden soll.

–units

3、nagios命令、服务配置

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

...

#'check_mysql_health'

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 $ARG7$

}

...

#vi /usr/local/nagios/etc/objects/servers/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!192.168.0.1!3306!myname!mypassword!threads-connected!1000!1500

}

define service{

use                             local-service         ; Name of service template to use

host_name                       myhostname

service_description             check_mysql_table_lock

check_command                   check_mysql_health!192.168.0.1!3306!myname!mypassword!table-lock-contention!1!2

}

...

4、重启nagios服务

#service nagios restart