一、安装扩展源
[root@www ~]# rpm -ivh http://mirrors.yun-idc.com/epel/6/i386/epel-release-6-8.noarch.rpm
二、安装Nagios相关软件包
[root@www ~]# yum -y install httpd nagios nagios-plugins nagios-plugins-all nrpe nagios-plugins-nrpe
三、设置nagios后台登录用户名和密码
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[root@www ~]
# htpasswd -c /etc/nagios/passwd nagiosadmin #这里指定用户名为nagiosadmin，而不是其他
New password:
Re-
type
new password:
Adding password
for
user nagiosadmin
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四、检查Nagios配置
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[root@www ~]
# nagios -v /etc/nagios/nagios.cfg
Nagios Core 3.5.1
Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 08-30-2013
License: GPL
Website: http:
//www
.nagios.org
Reading configuration data...
Read main config
file
okay...
Processing object config
file
'/etc/nagios/objects/commands.cfg'
...
Processing object config
file
'/etc/nagios/objects/contacts.cfg'
...
Processing object config
file
'/etc/nagios/objects/timeperiods.cfg'
...
Processing object config
file
'/etc/nagios/objects/templates.cfg'
...
Processing object config
file
'/etc/nagios/objects/localhost.cfg'
...
Processing object config directory
'/etc/nagios/conf.d'
...
Read object config files okay...
Running pre-flight check on configuration data...
Checking services...
Checked 8 services.
Checking hosts...
Checked 1 hosts.
Checking host
groups
...
Checked 1 host
groups
.
Checking service
groups
...
Checked 0 service
groups
.
Checking contacts...
Checked 1 contacts.
Checking contact
groups
...
Checked 1 contact
groups
.
Checking service escalations...
Checked 0 service escalations.
Checking service dependencies...
Checked 0 service dependencies.
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Checked 0 host dependencies.
Checking commands...
Checked 24 commands.
Checking
time
periods...
Checked 5
time
periods.
Checking
for
circular paths between hosts...
Checking
for
circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...
Total Warnings: 0
Total Errors: 0
Things
look
okay - No serious problems were detected during the pre-flight check
|
五、启动Nagios和http服务
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[root@www ~]
# /etc/init.d/httpd start
Starting httpd: [ OK ]
[root@www ~]
# /etc/init.d/nagios start
Starting nagios:
done
.
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六、浏览器访问
七、Nagios添加被监控客户端主机
1、安装Nagios服务
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[root@sh ~]
# rpm -ivh epel-release-6-8.noarch.rpm
[root@sh ~]
# yum -y install nagios-plugins nagios-plugins-all nrpe nagios-plugins-nrpe
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2、修改/etc/nagios/nrpe.cfg文件
[root@sh ~]# vim /etc/nagios/nrpe.cfg
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81 allowed_hosts=127.0.0.1,192.168.1.21
#添加nagios服务端IP
97 dont_blame_nrpe=1
#0改为1
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3、启动nrpe
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[root@sh ~]
# /etc/init.d/nrpe start
Starting nrpe: [ OK ]
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4、Nagios服务端添加被监控客户端主机
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[root@www ~]
# cd /etc/nagios/conf.d/
[root@www conf.d]
# ls
[root@www conf.d]
# vim 192.168.1.251.cfg
define host{
use linux-server
host_name 192.168.1.251
alias
1.251
address 192.168.1.251
}
define service{
use generic-service
host_name 192.168.1.251
service_description check_ping
check_command check_ping!100.0,20%!200.0,50%
max_check_attempts 5
normal_check_interval 1
}
define service{
use generic-service
host_name 192.168.1.251
service_description check_ssh
check_command check_ssh
max_check_attempts 5
#当nagios检测到问题时，一共尝试检测5次都有问题才会告警，如果该数值为1，那么检测到问题立即告警
normal_check_interval 1
#重新检测的时间间隔，单位是分钟，默认是3分钟
notification_interval 60
#在服务出现异常后，故障一直没有解决，nagios再次对使用者发出通知的时间。如果你认为，所有的事件只需要一次通知就够了，可以把这里的选项设为0
}
define service{
use generic-service
host_name 192.168.1.251
service_description check_http
check_command check_http
max_check_attempts 5
normal_check_interval 1
}
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5、检查配置
[root@www conf.d]# nagios -v /etc/nagios/nagios.cfg
6、重启nagios
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[root@www conf.d]
# /etc/init.d/nagios restart
Running configuration check...
done
.
Stopping nagios:
done
.
Starting nagios:
done
.
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7、查看效果
八、添加nrpe支持的监控服务
1、添加nrpe服务
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[root@www ~]
# vim /etc/nagios/objects/commands.cfg
################################################################################
# 'notify-host-by-email' command definition
define
command
{
command_name notify-host-by-email
command_line
/usr/bin/printf
"%b"
"***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HO
STNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate
/Time
: $LONGDATETIME$\n" |
/bin/mail
-s
"** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **"
$CONTACTEMAIL$
}
# 'notify-service-by-email' command definition
define
command
{
command_name notify-service-by-email
command_line
/usr/bin/printf
"%b"
"***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService
: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate
/Time
: $LONGDATETIME$\n\nAd
ditional Info:\n\n$SERVICEOUTPUT$\n
" | /bin/mail -s "
** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$
is $SERVICESTATE$ **" $CONTACTEMAIL$
}
define
command
{
command_name check_nrpe
#自定义check
command_line $USER1$
/check_nrpe
-H $HOSTADDRESS$ -c $ARG1$
}
################################################################################
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2、添加nrpe服务脚本
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[root@www ~]
# vim /etc/nagios/conf.d/192.168.1.251.cfg
......
#check_nrpe
define service{
use generic-service
host_name 192.168.1.251
service_description check_load
#监控负载
check_command check_nrpe!check_load
max_check_attempts 5
normal_check_interval 1
}
define service{
use generic-service
host_name 192.168.1.251
service_description check_disk_sda1
check_command check_nrpe!check_hda1
#check_nrpe为前面自定义的模块名称，check_hda1为被监控主机/etc/nagios/nrpe.cfg文件里定义的脚本名称
max_check_attempts 5
normal_check_interval 1
}
#define service{ #可以添加多块磁盘监控
# use generic-service
# host_name 192.168.1.251
# service_description check_disk_hda2
# check_command check_nrpe!check_hda2
# max_check_attempts 5
# normal_check_interval 1
#}
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[root@www ~]
# nagios -v /etc/nagios/nagios.cfg
.......
Total Warnings: 0
Total Errors: 0
Things
look
okay - No serious problems were detected during the pre-flight check
|
3、被监控主机通过nrpe.cfg文件定义的脚本命令
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[root@sh ~]
# vim /etc/nagios/nrpe.cfg
# The following examples use hardcoded command arguments...
command
[check_users]=
/usr/lib64/nagios/plugins/check_users
-w 5 -c 10
command
[check_load]=
/usr/lib64/nagios/plugins/check_load
-w 15,10,5 -c 30,25,20
command
[check_hda1]=
/usr/lib64/nagios/plugins/check_disk
-w 20% -c 10% -p
/dev/sda1
#command[check_hda2]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/hda2
command
[check_zombie_procs]=
/usr/lib64/nagios/plugins/check_procs
-w 5 -c 10 -s Z
command
[check_total_procs]=
/usr/lib64/nagios/plugins/check_procs
-w 150 -c 200
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4、重启服务
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[root@www ~]
# /etc/init.d/nagios restart
Running configuration check...
done
.
Stopping nagios:
done
.
Starting nagios:
done
.
|
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[root@sh ~]
# /etc/init.d/nrpe restart
Shutting down nrpe: [ OK ]
Starting nrpe: [ OK ]
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5、web页面查看结果
6、查看nagios日志文件
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[root@www ~]
# ls /var/log/nagios/
archives nagios.log objects.cache retention.dat spool status.dat
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[root@www ~]
# cat /var/log/nagios/nagios.log
[1449405095] Nagios 3.5.1 starting... (PID=1319)
[1449405095] Local
time
is Sun Dec 06 20:31:35 CST 2015
[1449405095] LOG VERSION: 2.0
[1449405095] Finished daemonizing... (New PID=1320)
[1449405217] SERVICE ALERT: localhost;HTTP;WARNING;SOFT;1;HTTP WARNING: HTTP
/1
.1 403 Forbidden - 5159 bytes
in
0.001 second response
time
[1449405277] SERVICE ALERT: localhost;HTTP;WARNING;SOFT;2;HTTP WARNING: HTTP
/1
.1 403 Forbidden - 5159 bytes
in
0.001 second response
time
[1449405337] SERVICE ALERT: localhost;HTTP;WARNING;SOFT;3;HTTP WARNING: HTTP
/1
.1 403 Forbidden - 5159 bytes
in
0.001 second response
time
[1449405397] SERVICE ALERT: localhost;HTTP;WARNING;HARD;4;HTTP WARNING: HTTP
/1
.1 403 Forbidden - 5159 bytes
in
0.001 second response
time
[1449405683] Caught SIGTERM, shutting down...
[1449405683] Successfully
shutdown
... (PID=1320)
[1449405684] Nagios 3.5.1 starting... (PID=1474)
[1449405684] Local
time
is Sun Dec 06 20:41:24 CST 2015
[1449405684] LOG VERSION: 2.0
[1449405684] Finished daemonizing... (New PID=1475)
[1449408863] Caught SIGTERM, shutting down...
[1449408863] Successfully
shutdown
... (PID=1475)
[1449408863] Nagios 3.5.1 starting... (PID=1833)
[1449408863] Local
time
is Sun Dec 06 21:34:23 CST 2015
[1449408863] LOG VERSION: 2.0
[1449408863] Finished daemonizing... (New PID=1834)
[1449408913] SERVICE ALERT: 192.168.1.251;check_http;CRITICAL;SOFT;1;connect to address 192.168.1.251 and port 80: Connection refused
[1449409033] SERVICE ALERT: 192.168.1.251;check_http;CRITICAL;SOFT;2;connect to address 192.168.1.251 and port 80: Connection refused
[1449409153] SERVICE ALERT: 192.168.1.251;check_http;CRITICAL;SOFT;3;connect to address 192.168.1.251 and port 80: Connection refused
[1449409273] SERVICE ALERT: 192.168.1.251;check_http;CRITICAL;SOFT;4;connect to address 192.168.1.251 and port 80: Connection refused
[1449409393] SERVICE ALERT: 192.168.1.251;check_http;CRITICAL;HARD;5;connect to address 192.168.1.251 and port 80: Connection refused
[1449409393] SERVICE NOTIFICATION: nagiosadmin;192.168.1.251;check_http;CRITICAL;notify-service-by-email;connect to address 192.168.1.251 and port 80: Connection refused
[1449410874] Caught SIGTERM, shutting down...
[1449410874] Successfully
shutdown
... (PID=1834)
[1449410874] Nagios 3.5.1 starting... (PID=2330)
[1449410874] Local
time
is Sun Dec 06 22:07:54 CST 2015
[1449410874] LOG VERSION: 2.0
[1449410874] Finished daemonizing... (New PID=2331)
[1449411134] SERVICE ALERT: 192.168.1.251;check_http;OK;HARD;5;HTTP OK: HTTP
/1
.1 200 OK - 3910 bytes
in
0.001 second response
time
[1449411134] SERVICE NOTIFICATION: nagiosadmin;192.168.1.251;check_http;OK;notify-service-by-email;HTTP OK: HTTP
/1
.1 200 OK - 3910 bytes
in
0.001 second response
time
[1449411714] Caught SIGTERM, shutting down...
[1449411714] Successfully
shutdown
... (PID=2331)
[1449411714] Nagios 3.5.1 starting... (PID=2614)
[1449411714] Local
time
is Sun Dec 06 22:21:54 CST 2015
[1449411714] LOG VERSION: 2.0
[1449411714] Finished daemonizing... (New PID=2615)
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九、Nagios配置邮件警告
1、增加define contact和define contactgroup配置
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[root@www ~]
# vim /etc/nagios/objects/contacts.cfg
# We only have one contact in this simple configuration file, so there is
# no need to create more than one contact group.
define contactgroup{
contactgroup_name admins
alias
Nagios Administrators
members nagiosadmin
}
# add mail addressee
define contact{
contact_name admin
use generic-contact
alias
administrator
email 741616710@qq.com
}
define contact{
contact_name ming
use generic-contact
alias
HM
email root@huangmingming.cn
}
define contactgroup{
contactgroup_name common
alias
common
members admin,ming
}
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2、修改define service，增加相应配置
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[root@www ~]
# vim /etc/nagios/conf.d/192.168.1.251.cfg
|
define service{
use generic-service
host_name 192.168.1.251
service_description check_http
check_command check_http
max_check_attempts 5
normal_check_interval 1
contact_groups common
notifications_enabled 1
notification_period 24x7
notification_options w,u,c,r
}
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[root@www ~]
# nagios -v /etc/nagios/nagios.cfg
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本文转自 HMLinux 51CTO博客，原文链接:
