專案即將上線，前段時間一直在折騰dell MD3200i儲存, mysql資料庫，由於服務已經進入了廣州IDC 機房，為了更好了解所有伺服器的健康與負載，以及相關服務的狀態，需要安裝監控軟體，推薦使用nagios 和 cacti，以下為nagios 監控的搭建過程：

系統平臺如下：

[root@tes102 ~]# rpm -q redhat-release

redhat-release-5Server-5.5.0.2

[root@tes102 ~]# uname -a

Linux tes102.gz.cn 2.6.18-194.el5xen #1 SMP Tue Mar 16 22:01:26 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

Apache 的部署：

(1) 從官檔上下載httpd-2.2.19.tar

安裝apache：

[root@tes102 nagios]# tar -xvf httpd-2.2.19.tar.gz

在安裝apache 之前先安裝以下包：

A. Apache portable Run-time libraries，Apache可移植執行庫，可以加速IO的訪問和使用Openssl

[root@tes102 nagios]# tar -xvf apr-1.3.8.tar.gz

[root@tes102 apr-1.3.8]# ./configure --enable-debug --enable-threads --disable-ipv6 --with-devrandom=/dev/random

Make & makeinstall

B. 實現Unicode和其他的傳統編碼之間轉換的需求

[root@tes102 nagios]# tar -xvf libiconv-1.13.tar.gz

[root@tes102 libiconv-1.13]# ./configure --enable-static=yes

Make & make install

C. Apr 字型轉換函式：

[root@tes102 nagios]# tar -xvf apr-iconv-1.2.1.tar.gz

[root@tes102 apr-iconv-1.2.1]# ./configure --with-apr=/usr/local/apr/bin/apr-1-config

Make & make install

D. Apr 輔助工具:

[root@tes102 nagios]# tar -xvf apr-util-1.3.9.tar.gz

[root@tes102 apr-util-1.3.9]# ./configure --with-apr=/usr/local/apr/bin/apr-1-config --with-apr-iconv --with-mysql --with-iconv

Make & make install

E. Perl庫，用於perl相容的正規表示式

[root@tes102 nagios]# tar -xvf pcre-7.9.tar.gz

[root@tes102 pcre-7.9]# ./configure --enable-rebuild-chartables --enable-utf8 --enable-newline-is-any --enable-pcregrep-libz --enable-pcregrep-libbz2

Make & make install

(2) 安裝apache

[root@tes102 httpd-2.2.19]# ./configure --enable-modules=all --enable-mods-shared=all --enable-file-cache --enable-cache --enable-disk-cache --enable-mem-cache --enable-echo --enable-example --enable-case-filter --enable-ext-filter --enable-charset-lite --enable-logio --enable-mime-magic --enable-expires --enable-headers --enable-usertrack --enable-unique-id --enable-version --enable-proxy --enable-proxy-connect --enable-proxy-http --enable-proxy-ftp --enable-proxy-ajp --enable-proxy-balancer --enable-ssl --enable-static-htpasswd --enable-static-ab --enable-http --enable-dav --enable-info --enable-cgi --enable-vhost-alias --enable-rewrite --enable-so --with-apr=/usr/local/apr/bin/apr-1-config --with-apr-util=/usr/local/apr/bin/apu-1-config --with-mpm=prefork

Make & make install

[root@tes102 httpd-2.2.19]# /usr/local/apache2/bin/apachectl -t

/usr/local/apache2/bin/httpd: error while loading shared libraries: libiconv.so.2: cannot open shared object file: No such file or directory

處理方法：

[root@tes102 httpd-2.2.19]# vim /etc/ld.so.conf

新增一行： /usr/local/lib

[root@tes102 httpd-2.2.19]# /sbin/ldconfig

[root@tes102 httpd-2.2.19]# /usr/local/apache2/bin/apachectl -t

Syntax OK

[root@tes102 httpd-2.2.19]# apachectl start

[root@tes102 httpd-2.2.19]# apachectl stop

---無報錯證明 apache 搭建成功

(3) 配置 httpd.conf 檔案

Nagios 的配置

(1) 下載伺服器端包

(2) 下載外掛包

(3) 新增nagios 帳號

[root@tes102 conf]# useradd nagios -s /sbin/nologin

(4) 安裝 nagios 服務端

[root@tes102 nagios]# tar -xvf nagios-3.2.1.tar.gz

[root@tes102 nagios-3.2.1]#./configure –prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios

[root@tes102 nagios-3.2.1]# make all

make install

- This installs the main program, CGIs, and HTML files

make install-init

- This installs the init script. in /etc/rc.d/init.d

make install-commandmode

- This installs and configures permissions on the

directory for holding the external command file

make install-config

- This installs *SAMPLE* config files in /usr/local/nagios/etc

You'll have to modify these sample files before you can

use Nagios. Read the HTML documentation for more info

on doing this. Pay particular attention to the docs on

object configuration files, as they determine what/how

things get monitored!

make install-webconf

- This installs the Apache config file for the Nagios

web interface ---此步不用執行，可以手動配置httpd.cnf

(5) 安裝nagios 外掛

[root@tes102 nagios]# tar -xvf nagios-plugins-1.4.15.tar.gz

[root@tes102 nagios-plugins-1.4.15]# ./configure -prefix=/usr/local/nagios

Make & Make install

(6) 配置nagios

A. 為了方便維護，註釋掉localhost.cfg , 新增 hosts.cfg hostgroups.cfg

Contactgroups.cfg

[root@tes102 etc]# vim nagios.cfg

# Definitions for monitoring the local (Linux) host

## modified by gabriel start with 2011-08-24

## In order to add host group contact group

#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

cfg_file=/usr/local/nagios/etc/objects/hosts.cfg

cfg_file=/usr/local/nagios/etc/objects/hostgroups.cfg

cfg_file=/usr/local/nagios/etc/objects/contactgroups.cfg

cfg_file=/usr/local/nagios/etc/objects/services.cfg

## modified by gabriel end with 2011-08-24

B. 建立相關檔案 chown nagios.nagios chmod 664

C.

(7) 安裝並配置 nrpe

A 安裝

[root@tes102 nagios]# tar -xvf nrpe-2.8.1.tar.gz

[root@tes102 nrpe-2.8.1]# ./configure -prefix=/usr/local/nrpe

*** Configuration summary for nrpe 2.8.1 05-10-2007 ***:

General Options:

-------------------------

NRPE port: 5666

NRPE user: nagios

NRPE group: nagios

Nagios user: nagios

Nagios group: nagios

Make & make install

B．nagios 與 nrpe 相互複製check檔案保證通訊

[root@tes102nrpe-2.8.1]#cp /usr/local/nrpe/libexec/check_nrpe /usr/local/nagios/libexec/

[root@tes102 libexec]# cp /usr/local/nagios/libexec/* /usr/local/nrpe/libexec/

C．配置nrpe

[root@tes102 libexec]# cp /soft/nagios/nrpe-2.8.1/sample-config/nrpe.cfg /usr/local/nrpe/etc/

[root@tes102 libexec]# chown nagios.nagios /usr/local/nrpe/etc -R

[root@tes102 libexec]# chmod 755 /usr/local/nrpe/etc -R

[root@tes102 libexec]# cat ../etc/nrpe.cfg | grep -v ^$ | grep -v ^#

pid_file=/var/run/nrpe.pid

server_port=5666

server_address=192.168.18.102

nrpe_user=nagios

nrpe_group=nagios

allowed_hosts=127.0.0.1,192.168.18.102

dont_blame_nrpe=0

debug=0

command_timeout=60

connection_timeout=300

command[check_users]=/usr/local/nrpe/libexec/check_users -w 5 -c 10

command[check_load]=/usr/local/nrpe/libexec/check_load -w 15,10,5 -c 30,25,20

command[check_df]=/usr/local/nrpe/libexec/check_disk -x /dev -w 20 -c 10

command[check_zombie_procs]=/usr/local/nrpe/libexec/check_procs -w 5 -c 10 -s Z

command[check_total_procs]=/usr/local/nrpe/libexec/check_procs -w 150 -c 200

command[check_ips]=/usr/local/nrpe/libexec/ip_conn.sh 8000 10000

[root@tes102 libexec]# e

C．檢查程式以及外掛情況

檢視程式埠號

[root@tes102 libexec]# netstat -an

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 192.168.18.102:5666 0.0.0.0:* LISTEN

檢視程式

[root@tes102 libexec]# ps -ef | grep -v grep | grep nrpe

nagios 20428 1 0 16:23 ? 00:00:00 nrpe -c /usr/local/nrpe/etc/nrpe.cfg –d

檢查外掛使用情況

[root@tes102 libexec]# ./check_nrpe -H 192.168.18.102 -c check_df

DISK OK - free space: / 103556 MB (84% inode=99%); /boot 167 MB (92% inode=99%); /dev/shm 1799 MB (100% inode=99%);| /=18531MB;128712;128722;0;128732 /boot=13MB;169;179;0;189 /dev/shm=0MB;1779;1789;0;1799

錯誤處理需要安裝php

[Wed Aug 24 22:33:01 2011] [notice] Apache/2.2.19 (Unix) mod_ssl/2.2.19 OpenSSL/0.9.8e-fips-rhel5 DAV/2 configured -- resuming normal operations

[Thu Aug 25 09:43:02 2011] [error] [client 192.168.14.101] File does not exist: /usr/local/nagios/share/

[Thu Aug 25 09:49:04 2011] [error] [client 192.168.14.101] File does not exist: /usr/local/nagios/share/http://192.168.18.102/nagios/side.php

下載php 原始碼

安裝php

Make & make install

在安裝過程中

…………

/root/php-5.3.8/ext/xmlrpc/libxmlrpc/encodings.c:73: undefined reference to `libiconv_open'

/root/php-5.3.8/ext/xmlrpc/libxmlrpc/encodings.c:81: undefined reference to `libiconv'

/root/php-5.3.8/ext/xmlrpc/libxmlrpc/encodings.c:101: undefined reference to `libiconv_close'

collect2: ld returned 1 exit status

make: *** [sapi/cli/php] ?.. 1

處理方法： ./configure 後 vim Makefile

在 EXTRA_LIBS=…. 列中新增引數 –liconv

然後make && make install

nagios 搭建

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