Redhat 5.2 配置nagios

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Redhat 5.2 配置nagios

安装系统组件
安装apache、gcc
配置apache
安装nagios组件
安装nagios
安装nagios-plugins
安装nrpe
配置被监控机
配置linux被监控机（客户端）
配置交换机被监控机（客户端）
配置windows被监控机（客户端）
配置邮件监控

安装组件

Apache、gcc glibc glibc-common gd-devel、 openssl、openssl-devel（open安装未列出）

net-snmp-libs net-snmp-devel net-snmp net-snmp-utils

安装apache、gcc

（由于rpm的依赖关系太烦人，配置yum，舒服多了，具体请见yum安装）

[root@localhost ~]# yum install httpd

……

Downloading Packages:

(1/4): apr-util-1.2.7-7.e 100% |=========================| 76 kB 00:00

(2/4): apr-1.2.7-11.i386. 100% |=========================| 123 kB 00:00

(3/4): httpd-2.2.3-11.el5 100% |=========================| 1.1 MB 00:01

(4/4): postgresql-libs-8. 100% |=========================| 196 kB 00:00

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 37017186

Importing GPG key 0x37017186 "Red Hat, Inc. (release key) <security@redhat.com>" from http://10.155.2.75/Server/RPM-GPG-KEY-redhat-release

Is this ok [y/N]: y

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

Installing: apr ######################### [1/4]

Installing: postgresql-libs ######################### [2/4]

Installing: apr-util ######################### [3/4]

Installing: httpd ######################### [4/4]

……

[root@localhost ~]# yum install gcc

……

Downloading Packages:

(1/5): libgomp-4.1.2-42.e 100% |=========================| 82 kB 00:00

(2/5): glibc-headers-2.5- 100% |=========================| 610 kB 00:00

(3/5): glibc-devel-2.5-24 100% |=========================| 2.0 MB 00:02

(4/5): gcc-4.1.2-42.el5.i 100% |=========================| 5.2 MB 00:07

(5/5): kernel-headers-2.6 100% |=========================| 843 kB 00:01

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

Installing: libgomp ######################### [1/5]

Installing: kernel-headers ######################### [2/5]

Installing: glibc-headers ######################### [3/5]

Installing: glibc-devel ######################### [4/5]

Installing: gcc ######################### [5/5]

Installed: gcc.i386 0:4.1.2-42.el5

Dependency Installed: glibc-devel.i386 0:2.5-24 glibc-headers.i386 0:2.5-24 kernel-headers.i386 0:2.6.18-92.el5 libgomp.i386 0:4.1.2-42.el5

Complete!

[root@localhost ~]# yum install glibc glibc-common gd-devel

……

Running Transaction

Installing: zlib-devel ####################### [ 1/12]

Installing: freetype-devel ####################### [ 2/12]

Installing: fontconfig-devel ####################### [ 3/12]

Installing: libpng-devel ####################### [ 4/12]

Installing: libXau-devel ####################### [ 5/12]

Installing: libjpeg-devel ####################### [ 6/12]

Installing: xorg-x11-proto-devel ####################### [ 7/12]

Installing: libX11-devel ####################### [ 8/12]

Installing: libXpm-devel ####################### [ 9/12]

Installing: libXdmcp-devel ####################### [10/12]

Installing: mesa-libGL-devel ####################### [11/12]

Installing: gd-devel ####################### [12/12]

Installed: gd-devel.i386 0:2.0.33-9.4.el5_1.1

Dependency Installed: fontconfig-devel.i386 0:2.4.1-7.el5 freetype-devel.i386 0:2.2.1-19.el5 libX11-devel.i386 0:1.0.3-9.el5 libXau-devel.i386 0:1.0.1-3.1 libXdmcp-devel.i386 0:1.0.1-2.1 libXpm-devel.i386 0:3.5.5-3 libjpeg-devel.i386 0:6b-37 libpng-devel.i386 2:1.2.10-7.1.el5_0.1 mesa-libGL-devel.i386 0:6.5.1-7.5.el5 xorg-x11-proto-devel.i386 0:7.1-9.fc6 zlib-devel.i386 0:1.2.3-3

Complete!

配置apache

注把apache 加入到nagcmd组，以便在通过web Interface 操作nagios是有足够的权限；

[root@localhost ~]# useradd nagios && passwd nagios //chinahr123$

Changing password for user nagios.

New UNIX password:

BAD PASSWORD: it is based on a dictionary word

Retype new UNIX password:

Sorry, passwords do not match.

New UNIX password:

Retype new UNIX password:

passwd: all authentication tokens updated successfully.

[root@localhost ~]# groupadd nagcmd

[root@localhost ~]# usermod -G nagcmd nagios

[root@localhost ~]# usermod -G nagcmd apache

安装nagios组件

安装nagios

http://cdnetworks-kr-2.dl.sourceforge.net/project/nagios/nagios-3.x/nagios-3.2.1/nagios-3.2.1.tar.gz

http://cdnetworks-kr-2.dl.sourceforge.net/project/nagiosplug/nagiosplug/1.4.15/nagios-plugins-1.4.15.tar.gz

[root@localhost src]# tar zxvf nagios-3.2.1.tar.gz

[root@localhost src]# cd nagios-3.2.1

[root@localhost nagios-3.2.1]#./configure --with-command-group=nagcmd --prefix=/usr/local/nagios

[root@localhost nagios-3.2.1]# make all

[root@localhost nagios-3.2.1]# make install

[root@localhost nagios-3.2.1]# make install-init

/usr/bin/install -c -m 755 -d -o root -g root /etc/rc.d/init.d

/usr/bin/install -c -m 755 -o root -g root daemon-init /etc/rc.d/init.d/nagios

[root@localhost nagios-3.2.1]# make install-config

……

*** Config files installed ***

Remember, these are *SAMPLE* config files. You'll need to read

the documentation for more information on how to actually define

services, hosts, etc. to fit your particular needs.

[root@localhost nagios-3.2.1]# make install-commandmode

/usr/bin/install -c -m 775 -o nagios -g nagcmd -d /usr/local/nagios/var/rw

chmod g+s /usr/local/nagios/var/rw

*** External command directory configured ***

验证安装在/usr/local/nagios,是否生成目录bin etc sbin share var.

[root@localhost ~]# cd /usr/local/nagios

[root@localhost nagios]# ls

bin etc sbin share var

安装nagios-plugins

[root@localhost src]# tar zxvf nagios-plugins-1.4.15.tar.gz

[root@localhost nagios-plugins-1.4.15]#./configure --with-nagios-user=nagios --with-nagios-group=nagios --prefix=/usr/local/nagios

[root@localhost nagios-plugins-1.4.15]# make && make install

验证是否安装成功，是否生成如下文件

[root@localhost nagios-plugins-1.4.15]# ls /usr/local/nagios/libexec

check_apt check_disk_smb check_ide_smart check_mrtg check_nwstat check_sensors check_users

check_breeze check_dns check_ifoperstatus check_mrtgtraf check_oracle check_smtp check_wave

check_by_ssh check_dummy check_ifstatus check_nagios check_overcr check_ssh negate

check_clamd check_file_age check_imap check_nntp check_ping check_swap urlize

check_cluster check_flexlm check_ircd check_nt check_pop check_tcp utils.pm

check_dhcp check_ftp check_load check_ntp check_procs check_time utils.sh

check_dig check_http check_log check_ntp_peer check_real check_udp

check_disk check_icmp check_mailq check_ntp_time check_rpc check_ups

配置nagios的WEB接口，也可以通过如下命令更改用户密码，

[root@localhost etc]# /usr/bin/htpasswd -c /usr/local/nagios/etc/htpasswd nagiosadmin

New password:

Re-type new password:

Adding password for user nagiosadmin

[root@localhost etc]# service httpd start

Starting httpd: [ OK ]

编辑httpd.conf，在结尾加上如下内容，保存，启动apache，service httpd restart

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

Options ExecCGI

AllowOverride None

Order allow,deny

Allow from all

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios/etc/htpasswd

Require valid-user

</Directory>

Alias /nagios /usr/local/nagios/share

Options None

AllowOverride None

Order allow,deny

Allow from all

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios/etc/htpasswd

Require valid-user

</Directory>

设置开机启动nagios服务

[root@localhost nagios-plugins-1.4.15]# chkconfig --add nagios

[root@localhost nagios-plugins-1.4.15]# chkconfig nagios on

验证nagios配置是否正常，此命令以后会经常使用，warning和error为0，表示正常，后面不正常的讨论，这里可以启动nagios服务

[root@localhost nagios-plugins-1.4.15]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

……

Checking misc settings...

Total Warnings: 0

Total Errors: 0

[root@localhost nagios-plugins-1.4.15]# service nagios start

Starting nagios: done.

安装nrpe

http://sourceforge.net/projects/nagios/files/nrpe-2.x/nrpe-2.8b1/nrpe-2.8b1.tar.gz/download

安装之前之前一定要安装gcc、 openssl、openssl-devel（尤其是linux被监控机，也是客户端）安装之后，是用/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d命令启动nrpe

tar -zxvf nrpe-2.8b1

cd nrpe-2.8b1

[root@localhost nrpe-2.8b1]# ./configure

[root@localhost nrpe-2.8b1]# make all

[root@localhost nrpe-2.8b1]# make install-plugin

[root@localhost nrpe-2.8b1]# make install-daemon

[root@localhost nrpe-2.8b1]# make install-daemon-config

/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc

/usr/bin/install -c -m 644 -o nagios -g nagios sample-config/nrpe.cfg /usr/local/nagios/etc

[root@localhost nrpe-2.8b1]/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

通过如下命令验证nrpe是否正常，可以看到端口5666已经打开

[root@localhost etc]# /usr/local/nagios/libexec/check_nrpe -H localhost

NRPE v2.8b1

[root@localhost etc]#

[root@localhost etc]# netstat -atulnp | grep 'nrpe'

tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 24823/nrpe

以上服务器端（也是就控制端）的nrpe（用于服务器的自身的监控）已经配置完成，接着服务器的nagios监控配置，配置如下nagios.cfg，去掉如下的“#”,每条记录都对应目录的相应的配置文件，下表中有说明，host.cfg和service.cfg是不存在的，可以自己建立，这些cfg文件都是可以自己建立的，只要在nagios.cfg添加相应的记录就行。现在我们只是做服务器自身的监控，只是用的commands.cfg、localhost.cfg，不用修改什么。

[root@localhost objects]# vi /usr/local/nagios/etc/nagios.cfg

cfg_file=/usr/local/nagios/etc/objects/commands.cfg ;

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

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

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

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

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

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

监控命令

command

nagios发出的哪个指令来执行某个监控,这也是自己定义的

联系人

contact

设置报警联系人，一般当然是系统管理员了

监控时间段

timeperiod

7X24小时不间断还是周一至周五,或是自定义的其他时间段

监控交换机

switch

例如主机是否存活,80端口是否开,磁盘使用情况或者自定义的服务等

被监控主机

localhost

监控机自己服务器

被监控主机

host

所需要监控的服务器,当然可以是监控机自己

被监控的服务

service

例如主机是否存活,80端口是否开,磁盘使用情况或者自定义的服务等

保存nagios.cfg后，用service httpd restart重启nagios服务，如果失败，用/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg验证，会提示出问题所在，关于问题解决在后面再将，这里只是服务器自身监控，应该不会有问题。

在IE下http://IP/nagios，输入nagiosadmin和密码(图1和图2)

配置被监控机

配置linux被监控机（客户端）

需要先安装gcc、openssl、openssl-devel。

先添加一个用户

[root@localhost ~]# useradd nagios

[root@localhost ~]# passwd nagios //123456

Changing password for user nagios.

New UNIX password:

BAD PASSWORD: it is too simplistic/systematic

Retype new UNIX password:

passwd: all authentication tokens updated successfully.

安装nagios-plugins-1.4.15.tar.gz

[root@localhost ~]# tar -zxvf nagios-plugins-1.4.15.tar.gz

[root@localhost ~]# cd nagios-plugins-1.4.15

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

[root@localhost nagios-plugins-1.4.15]# make

[root@localhost nagios-plugins-1.4.15]# make install

[root@localhost nagios-plugins-1.4.15]# chown nagios.nagios /usr/local/nagios

[root@localhost nagios-plugins-1.4.15]# chown -R nagios.nagios /usr/local/nagios/libexec

安装nrpe

[root@localhost ~]# tar -zxvf nrpe-2.8b1

[root@localhost ~]# cd nrpe-2.8b1

[root@localhost nrpe-2.8b1]# ./configure

[root@localhost nrpe-2.8b1]# make all

[root@localhost nrpe-2.8b1]# make install-plugin

[root@localhost nrpe-2.8b1]# make install-daemon

[root@localhost nrpe-2.8b1]# make install-daemon-config

编辑nrpe.cfg

[root@localhost ~]# vi /usr/local/nagios/etc/nrpe.cfg

查找如下加上nagios服务器ip地址

allowed_hosts=127.0.0.1,10.155.2.65

保存后，用如下命令启动nrpe和添加到开机启动中

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

echo '/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d &> /dev/null' >> /etc/rc.local

验证

[root@localhost etc]# /usr/local/nagios/libexec/check_nrpe -H localhost

NRPE v2.8b1

[root@localhost etc]# netstat -atulnp | grep 'nrpe'

tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 24823/nrpe

如果不正常见文章最后的问题和解决（1）

这里客户端的配置已经完成，已经可以到nagios服务器配置command.cfg监控，但是这里介绍另一种方法在编辑nrpe.cfg配置命令，nagios服务器会调用客户端的nrpe命令

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

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

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

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

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

command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%

下面这条是自己添加

command[check_ping81]=/usr/local/nagios/libexec/check_ping -H 10.155.0.1 -w 100.0,20% -c 500.0,60%#

command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p /dev/hda1

#command[命令名称]=命令定义

具体使用见帮助

[root@localhost nagios]# ls

bin etc include libexec share

[root@localhost nagios]# pwd

/usr/local/nagios

[root@localhost nagios]# libexec/check_ping -h

check_ping v1.4.15 (nagios-plugins 1.4.15)

<nagiosplug-devel@lists.sourceforge.net>

Use ping to check connection statistics for a remote host.

Usage:

check_ping -H <host_address> -w <wrta>,<wpl>% -c <crta>,<cpl>%

[-p packets] [-t timeout] [-4|-6]

Options:

-h, --help

Print detailed help screen

-V, --version

Print version information

-4, --use-ipv4

Use IPv4 connection

-6, --use-ipv6

Use IPv6 connection

-H, --hostname=HOST

host to ping

-w, --warning=THRESHOLD

warning threshold pair

-c, --critical=THRESHOLD

critical threshold pair

-p, --packets=INTEGER

number of ICMP ECHO packets to send (Default: 5)

-L, --link

show HTML in the plugin output (obsoleted by urlize)

-t, --timeout=INTEGER

Seconds before connection times out (default: 10)

配置nrpe.cfg后，必须重启nrpe。重启方法（杀死进程，在重启），否则更改不会生效

[root@localhost ~]# ps aux|grep nrpe

nagios 3327 0.0 0.0 4880 924 ? Ss Sep02 0:03 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

root 22293 0.0 0.0 3908 648 pts/0 R+ 11:07 0:00 grep nrpe

[root@localhost ~]# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

服务器端

测试与客户端连接，如下表示正常

[root@localhost nrpe-2.8b1]# /usr/local/nagios/libexec/check_nrpe -H 10.155.2.81

NRPE v2.8b1

下面表示不正常，见问题与解决（2）

[root@localhost nrpe-2.8b1]# /usr/local/nagios/libexec/check_nrpe -H 10.155.2.81

Connection refused by host

配置nagios.cfg，增加一条记录

[root@localhost ~]# vi /usr/local/nagios/etc/nagios.cfg

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

cfg_file=/usr/local/nagios/etc/objects/commands.cfg ;此前面已经设置过

配置nagios.cfg，增加一条记录

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

#在后面增加追加如下内容

#check nrpe

define command{

command_name check_nrpe

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

}

mylinux.cfg在目录中没有，需要自己添加

[root@localhost ~]# touch /usr/local/nagios/etc/objects/mylinux.cfg

#---------------------------------------------此段定义主机--------------------------------------------------------

define host{

use linux-server

host_name 10.155.2.81-cacti

alias mylinux

address 10.155.2.81

}

#--------------------------------下面定义服务器，也就是监控项------------------------------------------

define service{

use generic-service

host_name 10.155.2.81-cacti

service_description Swap Usage

check_command check_nrpe!check_swap

}

define service{

use generic-service

host_name 10.155.2.81-cacti

service_description Current Load

check_command check_nrpe!check_load

}

define service{

use generic-service

host_name 10.155.2.81-cacti

service_description Partition Usage

check_command check_nrpe!check_hda1

}

define service{

use generic-service

host_name 10.155.2.81-cacti

service_description Current Users

check_command check_nrpe!check_users

}

define service{

use generic-service

host_name 10.155.2.81-cacti

service_description Total Processes

check_command check_nrpe!check_total_procs

}

define service{

use generic-service

host_name 10.155.2.81-cacti

service_description PING

check_command check_nrpe!check_ping81

}

重启nagios，ie浏览(图3)

配置交换机被监控机（客户端）

这里的switch.cfg是交换机的一个监控模板，我保留这个cfg，复制为switch31.cfg编辑

[root@localhost objects]# vi /usr/local/nagios/etc/nagios.cfg

# Definitions for monitoring a router/switch

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

cfg_file=/usr/local/nagios/etc/objects/switch31.cfg

几乎不用改，把host name和address改了，最后一个mrtg我没用网络里没有注释掉了

[root@localhost objects]# vi switch31.cfg

define host{

use generic-switch ; Inherit default values from a template

host_name g13a-dell5424-31 ; The name we're giving to this switch

alias Linksys SRW224P Switch ; A longer name associated with the switch

address 10.155.0.31 ; IP address of the switch

hostgroups switches ; Host groups this switch is associated with

}

define hostgroup{

hostgroup_name switches ; The name of the hostgroup

alias Network Switches ; Long name of the group

}

define service{

use generic-service ; Inherit values from a template

host_name g13a-dell5424-31 ; The name of the host the service is associated with

service_description PING ; The service description

check_command check_ping!200.0,20%!600.0,60% ; The command used to monitor the service

normal_check_interval 5 ; Check the service every 5 minutes under normal conditions

retry_check_interval 1 ; Re-check the service every minute until its final/hard state is determined

}

# Monitor uptime via SNMP

define service{

use generic-service ; Inherit values from a template

host_name g13a-dell5424-31

service_description Uptime

check_command check_snmp!-C chrswitch -o sysUpTime.0

}

# Monitor Port 1 status via SNMP

define service{

use generic-service ; Inherit values from a template

host_name g13a-dell5424-31

service_description Port 1 Link Status

check_command check_snmp!-C chrswitch -o ifOperStatus.1 -r 1 -m RFC1213-MIB

}

# Monitor bandwidth via MRTG logs

#define service{

# use generic-service ; Inherit values from a template

# host_name linksys-srw224p

# service_description Port 1 Bandwidth Usage

# check_command check_local_mrtgtraf!/var/lib/mrtg/192.168.1.253_1.log!AVG!1000000,1000000!5000000,5000000!10

# }

Switch就完成，红色见问题3(图4)

配置windows被监控机（客户端）

Windows监控需要在windows安装一个插件nsclient++，http://nsclient.org/nscp/downloads

下载后解压到c盘

C:/NSClient>nsclient++ /install

Service NSClientpp installed...

l NSClient++.cpp(227) Service installed!

用记事本编辑nsc.ini，去掉注释符号”;”除了CheckWMI.dll和RemoteConfiguration.dll

[modules]

FileLogger.dll

CheckSystem.dll

CheckDisk.dll

NSClientListener.dll

NRPEListener.dll

SysTray.dll

CheckEventLog.dll

CheckHelpers.dll

;CheckWMI.dll

CheckExternalScripts.dll

NSCAAgent.dll

LUAScript.dll

;RemoteConfiguration.dll

NRPEClient.dll

CheckTaskSched.dll

[Settings]

allowed_hosts=10.155.2.65/32

[NSClient]

port=12489

C:/NSClient>NSClient++ -start

Starting NSClientpp

C:/NSClient>netstat -an | more

Active Connections

Proto Local Address Foreign Address State

TCP 0.0.0.0:5666 0.0.0.0:0 LISTENING

TCP 0.0.0.0:12489 0.0.0.0:0 LISTENING

服务器

[root@localhost ~]# vi /usr/local/nagios/etc/nagios.cfg

# Definitions for monitoring a Windows machine

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

[root@localhost ~]# vi /usr/local/nagios/etc/objects/windows.cfg

windows.cfg没有什么可改的，只是把hostname和ip改了就行了(图5)

邮件监控

邮件监控可以配置sendmail，我对sendmail一窍不通，这里还是用mail命令完成。首先是编辑nagios.cfg，以前已经设置了，这里看看就行了

[root@localhost objects]# vi /usr/local/nagios/etc/nagios.cfg

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

这里要注意的是如果在这设置间隔和期限等是在整个nagios生效的，所有的客户端都是按照这个配置，如果想单独设置在各个cfg中单独配置，一会会讲。整个cfg内容没什么说的了，contact_name和email，还有就是contactgroup_name在所有的地方都是设置这个名字，不要写错，member可以设置多个用”,”隔开，

[root@localhost objects]# vi contacts.cfg

define contact{

contact_name user1

alias Nagios Admin

service_notification_period 24x7

host_notification_period 24x7

service_notification_options w,u,c,r

host_notification_options d,r

service_notification_commands notify-by-email

host_notification_commands host-notify-by-email

email xxxx@163.com

pager 13800138000

}

define contactgroup{

contactgroup_name admins

alias Nagios Administrators

members user1

}

notify-by-email和host-notify-by-email在command.cfg中定义了（见问题5）

这个就是在服务中单独设置，就不多讲了

define service{

use generic-service ; Name of service template to use

host_name test_nrpe

service_description apache

is_volatile 0 #类似声音警告功能关闭

check_period 24x7 #监控期限为24X7

max_check_attempts 1 #最大重试次数

normal_check_interval 1 #标准检测时间间隔 1分钟

retry_check_interval 1 #重试时间间隔

contact_groups admins #联系组

notification_options w,u,c,r # w,u,c,r 发生这四种情况时，进行通告。

notification_interval 960 # 通告间隔

notification_period 24x7 #通告过期时间

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

}

参数说明

服务出了状况通知的时间段，这个时间段是前面 timeperiods.cfg 里面定义的。

service_notification_period 24x7

主机出现状况时通知的时间段，这个时间段是前面 timeperiods.cfg 里面定义的。

host_notification_period 24x7

当服务出现 w— 报警 (warning),u— 未知 (unkown),c— 严重 (critical),r— 从异常恢复到正常，在这四种情况下通知联系人

service_notification_options w,u,c,r

当主机出现 d— 当机 (down),u— 返回不可达 (unreachable),r— 从异常情况恢复正常 , 在这 3 种情况下通知联系人

host_notification_options d,u,r

服务出问题通知采用的命令 notify-service-by-email , 这个命令是在 commands.cfg 中定义的 , 作用是给联系人发邮件 . 在 nagios2.x 的版本上可以不一样，可以自己到 commands.cfg 里看一下；在这里也可以设置发送短信的方式通知联系人，前提是你要配置有发送知道的脚本，还要到 commands.cfg 里面添加发送脚本所用到的命令；

service_notification_commands notify-service-by-email

同上 , 主机出问题时采用的也是发邮件的方式通知联系人

host_notification_commands notify-host-by-email

指定联系的人 email 地址

email yaozhan189@163.com

联系人的手机 , 前提是要支持短信通知，这里没有启用通过手机短信的方式发送警报 pager 13800138000

问题和解决

1、

[root@localhost nrpe-2.8b1]# /usr/local/nagios/libexec/check_nrpe -H localhost

Connection refused by host

如果在本机上都出下如下结果，说明nrpe没有启动，用启动命令启动

2、

[root@localhost nrpe-2.8b1]# /usr/local/nagios/libexec/check_nrpe -H 10.155.2.81

Connection refused by host

可能是客户端nrpe.cfg，没有加服务器ip地址allowed_hosts=127.0.0.1,10.155.2.6

可能是客户端的防火墙

3、是因为nagios服务器中没有check_snmp命令，有安装nagios之前没有安装net-snmp和net-snmp-utils组件。网上有人提示安装组件后在重新安装nagios-plugins-1.4.15，我没有成功。(图6)

[root@localhost nagios]# libexec/check_snmp -h

-bash: libexec/check_snmp: No such file or directory

4网上有文章提示安装nagios之前，系统需要安装如下。

yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers perl gd gd-devel jpeg jpeg-devel libpng libpng-devel Net-snmp zlib freetype libart_lgpl cairo-devel pango-devel lrzsz*