nagios安装与基本配置（二）

小雪崩 发表于 2019-1-16 11:01:06

上一节中完成了nagios的安装，这一节主要对nagios进行简单的配置。

一、NRPE的安装
nagios在监控Linux主机时会要用到NRPE这个软件，工作原理如下图所示：

http://blog.运维网.com/attachment/201107/184235584.jpg
tar xzf nrpe-2.12.tar.gz
cd nrpe-2.12
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config

二、配置主机监控
一般主机监控配置都会存在一个hosts.cfg文件中，这里先在/usr/local/nagios/etc/目录下建立hosts.cgf文件之后写入如下内容：
define host{
   host_name                   nagios-server
   alias                         nagios server
   address                      192.168.191.128
   check_command                check-host-alive
   max_check_attempts          5
   check_period                24x7
   contact_groups                admins
   notification_interval       10
   notification_period          24x7
   notification_options          d,u,r
   }
define host{
   host_name                   windows2003
   alias                         windows2003
   address                      192.168.191.129
   check_command                check-host-alive
   max_check_attempts          5
   check_period                24x7
   contact_groups                admins
   notification_interval       10
   notification_period          24x7
   notification_options          d,u,r
   }
define host{
   host_name                   linux
   alias                         linux
   address                      192.168.191.130
   check_command                check-host-alive
   max_check_attempts          5
   check_period                24x7
   contact_groups                admins
   notification_interval       10
   notification_period          24x7
   notification_options          d,u,r
   }
define hostgroup{
   hostgroup_namesa-servers
   alias       sa servers
   members       nagios-server,windows2003,linux
   }

三、配置服务监控
和主机监控配置一样，服务配置也要存在一个services.cfg文件中，同样在/usr/local/nagios/etc/目录下建立services.cfg文件之后加入如下内容：
define service{
   host_name             nagios-server
   service_description check-host-alive
   check_command       check-host-alive
   max_check_attempts    5
   normal_check_interval 5
   retry_check_interval 2
   check_period          24x7
   notification_interval 10
   notification_period 24x7
   notification_options w,u,c,r
   contact_groups       admins
   }
define service{
   host_name             nagios-server
   service_description check_tcp 80
   check_period          24x7
   max_check_attempts    4
   normal_check_interval 3
   retry_check_interval 2
   contact_groups       admins
   notification_interval 10
   notification_period 24x7
   notification_options w,u,c,r
   check_command       check_tcp!80
   }
define service{
   host_name             nagios-server
   service_description cpu load
   check_command       check_nrpe!check_load
   check_period          24x7
   max_check_attempts    4
   normal_check_interval 3
   retry_check_interval 2
   contact_groups       admins
   notification_interval 10
   notification_period 24x7
   notification_options w,u,c,r
   }
define service{
   host_name             nagios-server
   service_description total-procs
   check_command       check_nrpe!check_total_procs
   check_period          24x7
   max_check_attempts    4
   normal_check_interval 3
   retry_check_interval 2
   contact_groups       admins
   notification_interval 10
   notification_period 24x7
   notification_options w,u,c,r
   }
define service{
   host_name             nagios-server
   service_description check_df
   check_command       check_nrpe!check_df
   check_period          24x7
   max_check_attempts    4
   normal_check_interval 3
   retry_check_interval 2
   contact_groups       admins
   notification_interval 10
   notification_period 24x7
   notification_options w,u,c,r
   }
define service{
   host_name             nagios-server
   service_description check_ips
   check_command       check_nrpe!check_ips
   check_period          24x7
   max_check_attempts    4
   normal_check_interval 3
   retry_check_interval 2
   contact_groups       admins
   notification_interval 10
   notification_period 24x7
   notification_options w,u,c,r
   }

   这里只给出nagios-server主机中服务的监控配置，其他两个被监控主机配置基本相同这里就不再给出。

四、配置nagios主配置文件nagios.cfg
这样只给出需要改的项目：
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/hosts.cfg
cfg_file=/usr/local/nagios/etc/services.cfg
#cfg_file=/usr/local/nagios//etc/objects/localhost.cfg

五、配置联系人文件contacts.cfg
define contact{
   contact_name                nagiosadmin
   alias                         Nagios Admin
   service_notification_period 24x7
   host_notification_period    24x7
   service_notification_options w,u,c,r
   host_notification_options    d,u,r
   service_notification_commands notify-by-email,service-notify-by-fx
   host_notification_commands    host-notify-by-email,host-notify-by-fx
   email                         abc@mail.com
   pager                         13800138000
   }
define contactgroup{
   contactgroup_name    admins
   alias                Nagios Administrators
   members             nagiosadmin
   }

六、NRPE配置
vi/usr/local/nagios/etc/nrpe.cfg
server_address=192.168.191.128
allowed_hosts=127.0.0.1,192.168.191.128
command=/usr/local/nrpe/libexec/check_users -w 5 -c 10
command=/usr/local/nrpe/libexec/check_load -w 15,10,5 -c 30,25,20
#command=/usr/local/nrpe/libexec/check_disk -w 20 -c 10 -p /dev/hda1 //注释掉
command=/usr/local/nrpe/libexec/check_disk -w 20 -c 10          //添加这一行，监控整个磁盘利用率
command=/usr/local/nrpe/libexec/check_procs -w 5 -c 10 -s z
command=/usr/local/nrpe/libexec/check_procs -w 150 -c 200
command=/usr/local/nrpe/libexec/ip_conn.sh 8000 10000 //监控ip连接数
启动nrpe服务
# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d

七、被监控Linux主机配置
1.安装相关软件
useraddnagios-s /sbin/nologin

tar xvfnagios-plugins-1.4.14.tar.gz
cd nagios-plugins-1.4.14
./configure--prefix=/usr/local/nagios
make
make install

chown –Rnagios:nagios/usr/local/nagios
chown –Rnagios:nagios/usr/local/nagios/libexec
tar xzf nrpe-2.12.tar.gz
cd nrpe-2.12
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config

2. 修改nrpe.cfg配置文件
allowed_hosts=127.0.0.1,192.168.191.128 //允许监控服务器访问，中间用逗号隔开；
# 修改NRPE的监控命令，添加相应的命令；
# The following examples use hardcoded command arguments...
command=/usr/local/nagios/libexec/check_users -w 5 -c 10
command=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
#command=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command=/usr/local/nagios/libexec/check_disk -w 20 -c 10
command=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command=/usr/local/nagios/libexec/check_procs -w 150 -c 200
command=/usr/local/nagios/libexec/check_swap -w 20% -c 10%
command=/usr/local/nagios/libexec/check_tcp -p 80

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

八、windows2003配置
在http://sourceforge.net/projects/nscplus/里下载nsclient++-0.3.8-win32.msi进行安装。
进安装目录修改NSC.ini文件，在部分的所在模块前面的注释“；”去掉，只保留CheckWMI.dll和RemoteConfiguration.dll这两个不用去掉注释；在部分找到”allowed_hosts”选项，将前面的 “；”注释去掉，并在后面加上监控服务器的IP；在部分找到“port=12489”这一行，并把前面的注释去掉，这是NSClinet的默认监听端口。
运行安装目录下的nsclient++.exet和nstray.exe文件。
在服务里找到
http://blog.运维网.com/attachment/201107/184528340.jpg
把属性中登录选项的允许服务与桌面交互前的对勾打上，如下图所示：

http://blog.运维网.com/attachment/201107/184545688.jpg
之后要在监控主机的commands.cfg中加入如下内容：
#'check_nt' command definition
define command{
   command_name check_nt
   command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v $ARG1$ $ARG2$
   }

九、启动服务查看结果
这时就可以在监控主机上启动nagios和httpd服务查看结果了，如下图所示：
http://blog.运维网.com/attachment/201107/184613892.jpg
http://blog.运维网.com/attachment/201107/184633501.jpg

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nagios安装与基本配置（二）