nagios系統(tǒng)搭建筆記

1.背景

原來的服務器和監(jiān)控系統(tǒng)在移動機房(2.14，外網(wǎng)IP120.132.xx.xx)，新上家校圈服務器(17臺)在世紀互聯(lián)機房，新舊服務器不在統(tǒng)一內(nèi)網(wǎng)。

現(xiàn)在家校圈服務器100.6(120.132.xx.xx)上部署nagios監(jiān)控部署系統(tǒng)，通過nsca傳送到2.14統(tǒng)一進行前端頁面管理。

2.安裝nagios

(1)yum -y install httpd gcc glibc glibc-common gd gd-devel

(2) rpm -ivh nagios-3.2.1-1.el5.rf

rmp -ivh nagios-plugins-1.4.13-1.el5.rf

(3)設置管理賬號：

/etc/httpd/conf.d/nagios.conf

#AuthName “Nagios Access”

#AuthType Basic

# AuthUserFile /etc/nagios/htpasswd.users

#Require valid-user

cat /etc/nagios/htpasswd.users

139guest:JKvJx00FiMbKo

139admin:d4PvA4FyLnZHM

vi /etc/nagios/cgi.cfg

authorized_for_system_information=139admin

authorized_for_configuration_information=139admin

authorized_for_system_commands=139admin

authorized_for_all_services=139admin,139guest

authorized_for_all_hosts=139admin,139guest

authorized_for_all_service_commands=139admin

authorized_for_all_host_commands=139admin

(4)測試

默認有個localhost.cfg是對本機的監(jiān)控。

/usr/bin/nagios -v /etc/nagios/nagios.cfg 一切正常

/etc/init.d/nagios start 不正常 報錯

Starting nagios:CONFIG ERROR! Start aborted. Check your Nagios configuration.

(5) 排查

a)初步懷疑權限問題，檢查/etc/nagios/權限、/etc/nagios/nagios.cfg里.cfg文件路徑以及其他權限，未發(fā)現(xiàn)問題。

b)檢查日志，/var/log/message，發(fā)現(xiàn)如下異常信息：

Nov 3 11:41:18 localhost kernel: audit(1288755678.187:52881): arch=c000003e syscall=2 success=no exit=-13 a0=6d61740 a1=10800 a2=feff72736b747264 a3=6d618f3 items=0 ppid=2377 pid=2380 auid=10015 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=25 comm=”nagios” exe=”/usr/bin/nagios” subj=user_u:system_r:nagios_t:s0 key=(null)

懷疑selinux的問題，檢查發(fā)現(xiàn)selinux是關閉的。無果。。。

cat /etc/selinux/config

SELINUX=disabled

c)繼續(xù)追蹤/etc//init.d/nagios啟動腳本

start)

echo -n “Starting nagios:”

$NagiosBin -v $NagiosCfgFile > /dev/null 2>1;

if [ $? -eq 0 ]; then

su – $NagiosUser -c “touch $NagiosVarDir/nagios.log $NagiosRetentionFile”

rm -f $NagiosCommandFile

touch $NagiosRunFile

chown $NagiosUser:$NagiosGroup $NagiosRunFile

$NagiosBin -d $NagiosCfgFile

if [ -d $NagiosLockDir ]; then touch $NagiosLockDir/$NagiosLockFile; fi

echo ” done.”

exit 0

else

echo “CONFIG ERROR! Start aborted. Check your Nagios configuration.”

exit 1

fi

;;

根據(jù)nagios啟動時的報錯信息“CONFIG ERROR! Start aborted. Check your Nagios configuration.”，說明在nagios執(zhí)行過程中，/usr/bin/nagios -v /etc/nagios/nagios.cfg是錯誤的，去掉> /dev/null 2>1，重新啟動nagios，果然報錯。提示nagios.cfg line465 配置錯誤。

vi /etc/nagios/nagios.cfg –line 465

check_result_path=/var/nagios/spool/checkresults

配置是沒錯的，權限也沒錯。把/var/nagios/spool/checkresults修改為777也不行。修改為check_result_path=/tmp/checkresults后啟動nagios，line465錯誤解決。但出現(xiàn)更多的貌似權限錯誤的配置。。。要瘋了。

d)懷疑nagios賬戶有問題，果然id nagios也是異常的。

e)懷疑selinux disabled后沒有重啟機器，征求重啟機器，問題果斷解決。

(6)done.

瀏覽器打開http://120.132.xx.xx/nagios/發(fā)現(xiàn)無法連接，Y的。

查看了http是正常的。。。。再查原來http端口被之前他們改為8080了。

瀏覽器重新打開http://120.132.xx.xx:8080/nagios/

everything done!!!

3.在所有(17臺)被監(jiān)控服務器上部署nrpe客戶端

(1)安裝相關軟件包

rpm -ivh *.rpm

fping-2.4-1.b2.2.el5.rf.i386.rpm

perl-Net-SNMP-5.2.0-1.2.el5.rf.noarch.rpm

perl-Socket6-0.19-3.fc6.x86_64.rpm

perl-Crypt-DES-2.05-3.2.el5.rf.x86_64.rpm

lm_sensors-2.10.0-3.1.x86_64.rpm

perl-Digest-HMAC-1.01-15.noarch.rpm

perl-Digest-SHA1-2.11-1.2.1.x86_64.rpm

nagios-plugins-1.4.13-1.el5.rf.x86_64.rpm

nagios-nrpe-2.5.2-1.el5.rf.x86_64.rpm

sysstat-7.0.2-1.el5.x86_64.rpm

(2)修改nrpe.cfg

vi /etc/nagios/nrpe.cfg

allowed_hosts=192.168.100.6

command[check_cpu]=/usr/lib64/nagios/plugins/check_cpu

command[check_load]=/usr/lib64/nagios/plugins/check_load -w 15,12,9 -c 30,25,20

command[check_disk]=/usr/lib64/nagios/plugins/check_disk -w 12% -c 8% -p /

(3)啟動nrpe

/etc/init.d/nrpe start

netstat -npl 查看nrpe5666端口是否啟動了。

(4)測試

在100.6執(zhí)行如下命令進行測試

/usr/lib64/nagios/plugins/check_nrpe -H 192.168.100.1 -c check_cpu

4.配置nagios

(1)cat /etc/nagios/objects/service/vianethost.cfg

################ jiaoxiao quan server ##############################