Redhat 5.2 配置nagios

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) <[email protected]>" 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

<Directory "/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

<Directory "/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 --prefile=/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)

Copyright (c) 1999 Ethan Galstad <[email protected]>

Copyright (c) 2000-2007 Nagios Plugin Development Team

        <[email protected]>

 

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                           [email protected]

        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         [email protected]

 

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*
 

 

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