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Nagios监控项目配备

发布时间： 2012-08-14 10:39:58 作者： rapoo

Nagios监控项目配置

1. check_icmp

简单地来说 默认我们使用的check_ping 插件是获取不到性能数据PING ok Packet loss = 0%, RTA = 0.80 ms 这个就是默认check_ping得出来的结果check_icmp是check_ping的扩展，加了性能数据，check_icmp得到的结果如下：

PING ok Packet loss = 0%, RTA = 0.80 ms |percent_packet_loss=0, rta=0.80

现在我们要在command.cfg中添加command,我的配置:

define command{

command_name check_icmp

command_line $USER1$/check_icmp -H $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -n 10

}

下面就在nagios 监控对象中添加icmp的选项

define service{

use generic-service ; Name of service template to use

host_name huzi

service_description PING

check_command check_icmp!100.0,20%!500.0,60%

}

保存退出，然后重新加载nagios服务

service nagios reload

可能出错：

check_icmp权限不够，无法执行

cd /usr/local/nagios/libexec (我的插件目录在这里)

chown root:nagios check_icmp

chmod 4711 check_icmp

再重新加载nagios服务

service nagios reload

2.mongodb

网上已经有人写好了mongodb的nagios监控脚本，参考：https://github.com/mzupan/nagios-plugin-mongodb/blob/master/README.md

1) 先安装git

yum install git

或

http://www.kernel.org/pub/software/scm/git/去下载一个吧。选择git-1.7.1.tar.gz（24-Apr-2010 02:38 2.9M ）

1.2 安装Git
(1) #tar xvzf git-1.6.6.tar.gz
(2) #cd git-1.6.6
(3) #./configure --prefix=/usr/local
说明：配置安装路径，git 将会安装到/usr/local 目录下
(4) #make
(5) #make install

2) 下载脚本

cd /etc/nagios/command

git clonegit://github.com/mzupan/nagios-plugin-mongodb.git

cd nagios-plugin-mongodb/
chmod 755 check_mongodb.py

如果执行报下面的错误：

# ./check_mongodb.py --help
need to install pymongo

需要安装pymongo：

git clonegit://github.com/mongodb/mongo-python-driver.git pymongo
cd pymongo/
python setup.py install

3) 修改nagios配置，加入这个命令

vi objects/commands.cfg
# 'check_mongodb' command definition连接数
define command {

command_name check_mongodb_connections

command_line $USER1$/check_mongodb.py -H $HOSTADDRESS$ -A connections -P $ARG1$ -W$ARG2$ -C $ARG3$

}

#内存

define command {

command_name check_mongodb_memory

command_line $USER1$/check_mongodb.py -H $HOSTADDRESS$ -A memory -P $ARG1$ -W $ARG2$-C $ARG3$

}

4) 加入mongo监控的配置

vi services.cfg
define service{

use generic-service ; Name ofservice template to use

host_name ..

service_description mongodb_master_check_mongodb_connections

check_command check_mongodb_connections!5080!100!300

notifications_enabled 1

}

define service{

use generic-service ; Name of service template to use

host_name ..

service_description mongodb_master_check_mongodb_memory

check_command check_mongodb_memory!5080!10!30

notifications_enabled 1

}

5) 没错的话，重载nagios就行了。

nagios -v /etc/nagios/nagios.cfg
service nagios reload

3. 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 toconnect to the server)
uptime (Time the server is running)
threads-connected (Number ofcurrently open connections)线程数
threadcache-hitrate (Hit rate of thethread-cache)慢查询
slave-lag (Seconds behind master)
slave-io-running (Slave iorunning: 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 prunedbecause of low memory)
keycache-hitrate (MyISAM keycache hitrate)
bufferpool-hitrate (InnoDB buffer poolhitrate)
bufferpool-wait-free (InnoDB buffer pool waits forclean 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 (Percentof 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'tlocate 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 <hostname>
Der Datenbankserver, der überwacht werden soll. Im Falle von"localhost" kann dieser Parameter weggelassen werden.
username <username>
Der Datenbankuser.
password <password>
Dessen Passwort.
mode <modus>
Mit dem mode-Parameter teilt man dem Plugin mit, was es tun soll.
name <objektname>
Hier kann die Prüfung auf ein einziges Objekt begrenzt werden.
name2 <string>
Verwendet man mode=sql, dann erscheint das SQL-Statement in der Ausgabe undden Performancedaten.
warning <range>
critical <range>
environment <variable>=<wert>
method <connectmethode>
Mit diesem Parameter teilt man dem Plugin mit, wie es sich zur Datenbankverbinden soll.
units <%|KB|MB|GB>

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 $ARG7$ #可以将$ARG1$换成$HOSTADDRESS$


}
...

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

define service{
use local-service ; Name of servicetemplate 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 servicetemplate 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

4.iostate

#官方默认插件中并无此插件，但官方还是提供了这个插件的下载，地址在

http://www.ofn.dk/files/software/check_iostat

#注意：保证所有被监控机上都安装了sysstat包，并可以执行iostat命令

#下载之后，放在每台被监控机的/usr/local/nagios/libexec/目录下
#然后更改属组，赋予可执行权限
chown nagios:nagios /usr/local/nagios/libexec/check_iostat
chmod 755 !$
#被监控机上更改nrpe的配置文件
vi /usr/local/nagios/etc/nrpe.cfg
#增加下边这两行,如果有更多磁盘，相应增加即可，至于警告和严重警告的值，请适当调整
#—————————-引用文字-开始—————————-
command[check_sda_iostat]=/usr/local/nagios/libexec/check_iostat -d sda -w 100-c 200

可能报错Can't locate Nagios/Plugin.pm in @INC (@INC contains:/usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8/usr/lib/perl5/site_perl/usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi/usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl/usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 .) at./check_iostat line 24.

方法一：

下载rpmforge-release 包。选择以下两个链接中匹配你的 OS 架构(i386/x86_64)的那个下载。如果不能确定是那种架构，请运行 uname -i 命令。

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.i386.rpm

rpm -ivh rpmforge-release-0.5.1-1.el5.rf.i386.rpm--force

yum check-update

yum install -yperl-Params-Validate perl-Math-Calc-Units perl-Regexp-Commonperl-Class-Accessor perl-Config-Tiny perl-Nagios-Plugin.noarch

方法二：

先安装如下模块，或者跟据错误提示安装相关模块：
wget http://search.cpan.org/CPAN/authors/id/T/TO/TONVOON/Nagios-Plugin-0.34.tar.gz
wget http://search.cpan.org/CPAN/authors/id/D/DR/DROLSKY/Params-Validate-0.95.tar.gz

wget http://search.cpan.org/CPAN/authors/id/S/SF/SFINK/Math-Calc-Units-1.07.tar.gz

wget http://search.cpan.org/CPAN/authors/id/A/AB/ABIGAIL/Regexp-Common-2.122.tar.gz
wget http://mirrors.xmu.edu.cn/CPAN/authors/id/K/KA/KASEI/Class-Accessor-0.31.tar.gz
wget http://mirrors.xmu.edu.cn/CPAN/authors/id/A/AD/ADAMK/Config-Tiny-2.12.tar.gz

下载后，在被监控机上（也可以监控机上，就是监控本机）解压安装:
perl Makefile.PL ;make && make install

在被监控机上/usr/local/nagios/etc/nrpe.cfg配置文件里添加

command[check_iostat]=/usr/local/nagios/libexec/check_iostat-w 5 -c 10

把脚本check_iostat放到被监控机的/usr/local/nagios/libexec/目录下，并赋权限

chmod +x/usr/local/nagios/libexec/check_iostat

Chown nagios:nagios/usr/local/nagios/libexec/check_iostat

测试：[root@Rs-02 libexec]# ./check_iostat -w 5 -c 10
IOSTAT OK - user 0.54 nice 0.01 sys 1.41 iowait 1.37 idle 0.00 |iowait=1.37%;; idle=0.00%;; user=0.54%;; nice=0.01%;; sys=1.41%;;

在监控机/usr/local/nagios/etc/objects/commands.cfg里面添加

vim commands.cfg

#iostate

define command {

command_name check_iostat

command_line $USER1$/check_iostat -w $ARG1$ -c $ARG2$

}

vim services.cfg

#iostat

define service{

use generic-service ; Name ofservice template to use

hostgroup_name linux-servers ;可以使用组，单个用户就host_name，以逗号间隔

service_description check_iostat

check_command check_iostat!100!200

notifications_enabled 1

}

/usr/local/nagios/bin/nagios -v/usr/local/nagios/etc/nagios.cfg

service nagios reload

但是在此需要使用nrpe来完成：

被监控机安装Nagios-plugins，nrpe

scp 121.9.213.96:/dist/dist/nagios-plugins-1.4.15.tar.gz./

scp 121.9.213.96:/dist/dist/nrpe-2.8.1.tar.gz./

useraddnagios

tar -zxvfnagios-plugins-1.4.15.tar.gz

cdnagios-plugins-1.4.15

./configure--prefix=/usr/local/nagios

make&& make install

chown -Rnagios.nagios /usr/local/nagios/

cd ..

tar -xvfnrpe-2.8.1.tar.gz

cdnrpe-2.8.1

./configure

make all

makeinstall-plugin

makeinstall-daemon

makeinstall-daemon-config

sed "$(sed -n '/allowed_hosts/='/usr/local/nagios/etc/nrpe.cfg) s/$/,121.9.213.96/"/usr/local/nagios/etc/nrpe.cfg|tee /usr/local/nagios/etc/nrpe.cfg.bak

rm -f/usr/local/nagios/etc/nrpe.cfg

cp/usr/local/nagios/etc/nrpe.cfg.bak /usr/local/nagios/etc/nrpe.cfg

echo"command[check_iostat]=/usr/local/nagios/libexec/check_iostat -w 100 -c200">>/usr/local/nagios/etc/nrpe.cfg

localip=$(echo$PS1|awk '{print $1}'|cut -d'_' -f4)

echo"server_address=$localip ">>/usr/local/nagios/etc/nrpe.cfg

scp121.9.213.96:/usr/local/nagios/libexec/check_iostat /usr/local/nagios/libexec/

chownnagios.nagios /usr/local/nagios/libexec/check_iostat

chmod 755/usr/local/nagios/libexec/check_iostat

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm

rpm -ivh rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm--force

yumcheck-update

yuminstall -y perl-Params-Validate perl-Math-Calc-Units perl-Regexp-Commonperl-Class-Accessor perl-Config-Tiny perl-Nagios-Plugin.noarch

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

tail/var/log/messages

在监控机上：

vimcommands.cfg

#iostat

definecommand {

command_name check_iostat

command_line $USER1$/check_iostat -W $ARG1$ -C $ARG2$

}

#nrpe

definecommand {

command_name check_nrpe

command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c$ARG1$

}

vimservices.cfg

defineservice{

use generic-service

host_name *****

service_description iostat

check_command check_nrpe!check_iostat

}

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