构建Nagios监控（一）

一，安装LAMP环境

#yum -y install httpd gccg libcg libc-commonphpgdgd-devel libpng libmng libjpeg zlib

#service httpd restart

#echo "<?phpinfo();?>" >/var/www/html/index.php

在浏览器里输入http://192.168.77.83//主机IP

Lamp环境成功安装！

二，安装nagios

#groupaddnagcmd

#useradd-mnagios

#usermod-Gnagcmdnagios

#usermod-Gnagcmdapache

#tarzxvfnagios-3.2.0.tar.gz-C/usr/src//将nagios安装程序解压到这个目录下

#cd/usr/src/nagios-3.2.0

#./configure--with-command-group=nagcmd--with-gd-lib=/usr/lib/--with-gd-inc=/usr/include

#makeall//安装二进制运行程序、初始化脚本、配置文件样本并设置运行目录权限

#makeinstall//安装生成/usr/local/nagios/share的目录（即nagiosWEB访问界面的站点目录）

#makeinstall-init//安装生成/etc/rc.d/init.d/nagios启动脚本

#makeinstall-config//安装生成/usr/local/nagios/etc下的nagios相关配置文件

#makeinstall-webconf//安装Nagios的WEB配置文件到Apache的conf.d目录下

#makeinstall-commandmode//设定相应nagios工作目录的权限

检测nagios安装情况---------nagios默认安装到/usr/local/nagios。

#ls/usr/local/nagios

如有bin、etc、share、sbin、var这5个目录，则表示安装成功。

nagios目录说明：

bin有一个重要的nagios命令，用于检查nagios主配置文件nagios.cfg是否有语法等错误

sbinNagiosCgi文件所在目录，也就是执行外部命令所需文件所在的目录

share此目录就是上面WEB接口访问的站点目录

etc配置文件

var存放启动nagios后的相关文件及日志

二，配置nagios的web接口

#vi/etc/httpd/conf.d/nagios.conf

ScriptAlias/nagios/cgi-bin"/usr/local/nagios/sbin"

<Directory"/usr/local/nagios/sbin">

#SSLRequireSSL

OptionsExecCGI

AllowOverrideNone

Orderallow,deny

Allowfromall

#Orderdeny,allow

#Denyfromall

#Allowfrom127.0.0.1

AuthName"NagiosAccess"

AuthTypeBasic

AuthUserFile/usr/local/nagios/etc/htpasswd.users

Requirevalid-user

</Directory>

Alias/nagios"/usr/local/nagios/share"

<Directory"/usr/local/nagios/share">

#SSLRequireSSL

OptionsNone

AllowOverrideNone

Orderallow,deny

Allowfromall

#Orderdeny,allow

#Denyfromall

#Allowfrom127.0.0.1

AuthName"NagiosAccess"

AuthTypeBasic

AuthUserFile/usr/local/nagios/etc/htpasswd.users

Requirevalid-user

</Directory>

创建nagios用户登录。用户名为nagiosadmin密码123456

#htpasswd-c/usr/local/nagios/etc/htpasswd.usersnagiosadmin

然后查看这个用户是否创建

#cat/usr/local/nagios/etc/htpasswd.users

这里的默认用户为nagiosadmin，自定义的用户请在cgi.cfg配置文件里添加

后面用逗号隔开

三，安装nagios插件及汉化包

1，安装nagios插件(mysql-devel)

#tarzxvfnagios-plugins-1.4.14.tar.gz-C/usr/scr

#cd/usr/src/nagios-plugins-1.4.14

#./configure--with-nagios-user=nagios--with-nagios-group=nagcmd

#make

#makeinstall

2，安装nrpe

#yum-yinstallopenssl-devel

#tarzxvfnrpe-2.12.tar.gz-C/usr/src/

#cd/usr/src/nrpe-2.12

#./configure

#makeall&&makeinstall

#makeinstall-plugin

3，安装汉化包

#tarjxvfnagios-cn-3.2.0.tar.bz2-C/usr/src

#cd/usr/src/nagios-cn-3.2.0

#./configure

#makeall

#makeinstall

SELinux下指定强制目标模式：

#chcon-R-thttpd_sys_content_t/usr/local/nagios/sbin/

#chcon-R-thttpd_sys_content_t/usr/local/nagios/share/

启动nagios

#chkconfig--addnagios

#chkconfig--level35nagioson

#chkconfig--listnagios

#servicenagiosrestart

登录测试：

http://IP/nagios/用户名：nagiosadmin密码：123456

四，添加要监控的主机和服务

1，我们为了方便维护，首先将主机和主机组以及服务和服务组都划分开来。

#cd/usr/local/nagios/etc

#mkdirhosts//用来定义主机

#mkdirservice//用来定义服务

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

在这里添加如下两行，对应hosts和service这两个路劲

cfg_dir=/usr/local/nagios/etc/hosts

cfg_dir=/usr/local/nagios/etc/service

然后我将定义主机组的配置文件放到objects这个目录下，名字为hosts.cfg

#cd/usr/local/nagios/etc/objects

#vihosts.cfg

definehostgroup{

hostgroup_namelinux-servers;linux主机组名

aliashkrtlinuxserver;别名

members201;成员主机，这里我们以201这台主机为例

}

definehostgroup{

hostgroup_namewindows-servers;windows主机组名

aliashkrtwinserver;别名

members126;主机成员

}

将主机组这个配置文件的路劲添加到nagios.cfg文件中

#cd/usr/local/nagios/etc/nagios.cfg

添加以下一行内容

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

2，我们要监控一台linux主机，以192.168.0.201这台为例。配置文件为201.cfg

#vi/usr/local/nagios/etc/hosts/201.cfg//这里是201主机的配置文件

添加以下内容：

definehost{

host_name201//主机名

alias201//别名

address192.168.1.201//主机的IP

check_commandcheck-host-alive

uselinux-server

max_check_attempts10

check_period24x7

event_handlernotify-host-by-email

process_perf_data1

contact_groupsadmins

notification_interval20

notification_period24x7

notification_optionsd,r

2d_coords0,700

3d_coords0,700,000

}

#vi/usr/local/nagios/etc/service/201.cfg//配置要监控的服务

添加以下内容：

defineservice{

service_descriptionHTTP

check_commandcheck_nrpe!check_http

host_name201

check_period24x7

notification_period24x7

contact_groupsadmins

notification_interval15

notification_optionsw,u,c,r

max_check_attempts3

check_interval5

retry_interval1

active_checks_enabled1

passive_checks_enabled0

notifications_enabled1

check_freshness0

freshness_threshold86400

usegeneric-service

}

4，添加联系人，修改邮箱地址

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

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

在最最后面添加以下内容

definecommand{

command_namecheck_nrpe

command_line$USER1$/check_nrpe-H$HOSTADDRESS$-c$ARG1$-t30

}

#/usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfg//检查nagios配置

五，配置飞信报警

#tarzxvffetion20091117-linux.tar.gz–C/usr/local/feixin

#vi/etc/ld.so.conf

底部添加

/usr/local/feixin

#chmod777/usr/local/feixin/fetion

#ldconfig

执行#/usr/local/feixin/fetion将输出一下信息

测试：

#/usr/local/feixin/fetion--mobile=13800138000--pwd=123456--to=13800138000--msg-gb="Hellonagios"–debug

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

#byfetionsms

definecommand{

command_namenotify-service-by-sms

command_line/usr/local/feixin/fetion--mobile=13800138000--pwd=123456--to=$CONTACTPAGER$--msg-utf8="'$HOSTADDRESS$'$HOSTALIAS$/$SERVICEDESC$is$SERVICESTATE$"

}

definecommand{

command_namenotify-host-by-sms

command_line/usr/local/feixin/fetion--mobile=13800138000--pwd=123456--to=$CONTACTPAGER$--msg-utf8="HOST$HOSTSTATE$alertfor$HOSTNAME$!on'$DATETIME$'"

}

2，#viobjects/templates.cfg

definecontact{

namegeneric-contact;Thenameofthiscontacttemplate

service_notification_period24x7;servicenotificationscanbesentanytime

host_notification_period24x7;hostnotificationscanbesentanytime

service_notification_optionsw,u,c,r,f,s;sendnotificationsforallservicestates,flappingevents,andscheduleddowntimeevents

host_notification_optionsd,u,r,f,s;sendnotificationsforallhoststates,flappingevents,andscheduleddowntimeevents

service_notification_commandsnotify-service-by-email,notify-service-by-sms;sendservicenotificationsviaemail

host_notification_commandsnotify-host-by-email,notify-host-by-sms;

3，#viobjects/contacts.cfg

definecontact{

contact_namenagiosadmin;Shortnameofuser

usegeneric-contact;Inheritdefaultvaluesfromgeneric-contacttemplate(definedabove)

aliasNagiosAdmin;Fullnameofuser

emailmrw621@yahoo.cn;<<*****CHANGETHISTOYOUREMAILADDRESS******

pager13800138000

}

服务器端已搭建完毕！