RPM包源
centos5 32位epel源下载地址: www.lishiming.net/data/attachment/forum/epel-release-5-4_32.noarch.rpm
64位下载地址: www.lishiming.net/data/attachment/forum/epel-release-5-4_64.noarch.rpm
centos6
32位epel yum源下载地址: www.lishiming.net/data/attachment/forum/epel-release-6-8_32.noarch.rpm
一、Nagios安装 - 服务端(192.168.0.11)
Centos6默认的yum源里没有nagios相关的rpm包,可是咱们能够安装一个epel的扩展源:
yum install -y httpd nagios nagios-plugins nagios-plugins-all nrpe nagios-plugins-nrpe
设置登陆nagios后台的用户和密码:htpasswd -c /etc/nagios/passwd nagiosadmin
vim /etc/nagios/nagios.cfg
nagios -v /etc/nagios/nagios.cfg 检测配置文件
启动服务:service httpd start; service nagios start
二、Nagios安装 - 客户端(192.168.0.12)
在客户端机器上 rpm -ivh http://www.aminglinux.com/bbs/data/attachment/forum/month_1211/epel-release-6-7.noarch.rpm
yum install -y nagios-plugins nagios-plugins-all nrpe nagios-plugins-nrpe
vim /etc/nagios/nrpe.cfg 找到“allowed_hosts=127.0.0.1” 改成 “allowed_hosts=127.0.0.1,192.168.0.11” 后面的ip为服务端ip; 找到” dont_blame_nrpe=0” 改成 “dont_blame_nrpe=1”
启动客户端 /etc/init.d/nrpe start
三、监控中心(192.168.0.11)添加被监控主机(192.168.0.12)
cd /etc/nagios/conf.d/
vim 192.168.0.12.cfg //加入:
- define host{
- use linux-server ; Name of host template to use
- ; This host definition will inherit all variables that are defined
- ; in (or inherited by) the linux-server host template definition.
- host_name 192.168.0.12
- alias 0.12
- address 192.168.0.12
- }
- define service{
- use generic-service
- host_name 192.168.0.12
- 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 192.168.0.12
- service_description check_ssh
- check_command check_ssh
- max_check_attempts 5
- normal_check_interval 1
- }
- define service{
- use generic-service
- host_name 192.168.0.12
- service_description check_http
- check_command check_http
- max_check_attempts 5
- normal_check_interval 1
- }
四、配置文件的简单说明
咱们定义的配置文件中一共监控了三个service:ssh, ping, http 这三个项目是使用本地的nagios工具去链接远程机器,也就是说即便客户端没有安装nagios-plugins以及nrpe也是能够监控到的。其余的一些service诸如负载、磁盘使用等是须要服务端经过nrpe去链接到远程主机得到信息,因此须要远程主机安装nrpe服务以及相应的执行脚本(nagios-plugins)
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,若是该数值为1,那么检测到问题当即告警
normal_check_interval 1#从新检测的时间间隔,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。单位是分钟。若是你认为,全部的事件只须要一次通知就够了,能够把这里的选项设为0。
五、 继续添加服务
服务端vim /etc/nagios/objects/commands.cfg
增长:define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
继续编辑 vim /etc/nagios/conf.d/192.168.0.12.cfg
增长以下内容:
- define service{
- use generic-service
- host_name 192.168.0.12
- service_description check_load
- check_command check_nrpe!check_load
- max_check_attempts 5
- normal_check_interval 1
- }
- define service{
- use generic-service
- host_name 192.168.0.12
- service_description check_disk_hda1
- check_command check_nrpe!check_hda1
- max_check_attempts 5
- normal_check_interval 1
- }
- define service{
- use generic-service
- host_name 192.168.0.12
- service_description check_disk_hda2
- check_command check_nrpe!check_hda2
- max_check_attempts 5
- normal_check_interval 1
- }
check_nrpe!check_load :这里的check_nrpe就是在commands.cfg刚刚定义的,check_load是远程主机上的一个检测脚本
在远程主机上vim /etc/nagios/nrpe.cfg 搜索check_load,这行就是在服务端上要执行的脚本了,咱们能够手动执行这个脚本
把check_hda1更改一下:/dev/hda1 改成 /dev/sda1
再加一行command[check_hda2]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/sda2
客户端上重启一下nrpe服务: service nrpe restart
服务端也重启一下nagios服务: service nagios restart
六、 配置图形显示 pnp4nagios
(1)安装
yum install pnp4nagios rrdtool
(2)配置主配置文件
vim /etc/nagios/nagios.cfg //修改以下配置
- process_performance_data=1
- host_perfdata_command=process-host-perfdata
- service_perfdata_command=process-service-perfdata
- enable_environment_macros=1
(3)修改commands.cfg
vim /etc/nagios/objects/commands.cfg //注释掉原有对process-host-perfdata和process-service-perfdata,从新定义
- define command {
- command_name process-service-perfdata
- command_line /usr/bin/perl /usr/libexec/pnp4nagios/process_perfdata.pl
- }
-
- define command {
- command_name process-host-perfdata
- command_line /usr/bin/perl /usr/libexec/pnp4nagios/process_perfdata.pl -d HOSTPERFDATA
- }
(4)修改配置文件templates.cfg
vim /etc/nagios/objects/templates.cfg define host {
name hosts-pnp
register 0
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
process_perf_data 1
}
define service {
name srv-pnp
register 0
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
process_perf_data 1
}
(5)修改host和service配置
vim /etc/nagios/conf.d/192.168.0.12.cfg
把 “define host{
use linux-server”
改成:
define host{
use linux-server,hosts-pnp
修改对应的service,好比
把
define service{
use generic-service
host_name 192.168.0.12
service_description check_disk_hda1
check_command check_nrpe!check_hda1
max_check_attempts 5
normal_check_interval 1
}
改成:
define service{
use generic-service,srv-pnp
host_name 192.168.0.12
service_description check_disk_hda1
check_command check_nrpe!check_hda1
max_check_attempts 5
normal_check_interval 1
}
(6) 重启和启动各个服务:
service nagios restart
service httpd restart
service npcd start
(7) 访问测试
两种访问方法:
ip/nagios/
ip/pnp4nagios/
七、配置邮件告警
vim /etc/nagios/objects/contacts.cfg //增长:
- define contact{
- contact_name 123
- use generic-contact
- alias aming
- email lishiming2009@139.com
- }
- define contact{
- contact_name 456
- use generic-contact
- alias aaa
- email aminglinux@139.com
- }
- define contactgroup{
- contactgroup_name common
- alias common
- members 123,456
- }
而后在要须要告警的服务里面加上contactgroup
- define service{
- use generic-service
- host_name 192.168.0.12
- service_description check_load
- check_command check_nrpe!check_load
- max_check_attempts 5
- normal_check_interval 1
- contact_groups common
- }
八、 几个重要参数说明
notifications_enabled : 是否开启提醒功能。1为开启,0为禁用。通常,这个选项会在主配置文件(nagios.cfg)中定义,效果相同。
notification_interval: 以前刚介绍过,表示重复发送提醒信息的最短间隔时间。默认间隔时间是60分钟。若是这个值设置为0,将不会发送重复提醒。
notification_period: 发送提醒的时间段。很是重要的主机(服务)我定义为7×24,通常的主机(服务)就定义为上班时间。若是不在定义的时间段内,不管什么问题发生,都不会发送提醒。
notification_options: 这个参数定义了发送提醒包括的状况:d = 状态为DOWN, u = 状态为UNREACHABLE , r = 状态恢复为OK , f = flapping。,n=不发送提醒。