上一節中完成了nagios的安裝，這一節主要對nagios進行簡單的配置。
一、NRPE的安裝
nagios在監控Linux主機時會要用到NRPE這個軟件，工作原理如下圖所示：
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、配置主機監控
一般主機監控配置都會存在一個hosts.cfg文件中，這裏先在/usr/local/nagios/etc/目錄下建立hosts.cgf文件之後寫入如下內容：
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_name sa-servers
alias sa servers
members nagios-server,windows2003,linux
}
三、配置服務監控
和主機監控配置一樣，服務配置也要存在一個services.cfg文件中，同樣在/usr/local/nagios/etc/目錄下建立services.cfg文件之後加入如下內容：
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
}
這裏只給出nagios-server主機中服務的監控配置，其他兩個被監控主機配置基本相同這裏就不再給出。
四、配置nagios主配置文件nagios.cfg
這樣只給出需要改的項目：
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、配置聯繫人文件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 [email protected]
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[check_users]=/usr/local/nrpe/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nrpe/libexec/check_load -w 15,10,5 -c 30,25,20
#command[check_hda1]=/usr/local/nrpe/libexec/check_disk -w 20 -c 10 -p /dev/hda1 //註釋掉
command[check_df]=/usr/local/nrpe/libexec/check_disk -w 20 -c 10 //添加這一行，監控整個磁盤利用率
command[check_zombie_procs]=/usr/local/nrpe/libexec/check_procs -w 5 -c 10 -s z
command[check_total_procs]=/usr/local/nrpe/libexec/check_procs -w 150 -c 200
command[check_ips]=/usr/local/nrpe/libexec/ip_conn.sh 8000 10000 //監控ip連接數
啓動nrpe服務
# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d
七、被監控Linux主機配置
1.安裝相關軟件
useradd nagios -s /sbin/nologin
tar xvf nagios-plugins-
cd nagios-plugins-
./configure --prefix=/usr/local/nagios
make
make install
chown –R nagios:nagios /usr/local/nagios
chown –R nagios: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 //允許監控服務器訪問，中間用逗號隔開；
# 修改NRPE的監控命令，添加相應的命令；
# The following examples use hardcoded command arguments...
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_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_df]=/usr/local/nagios/libexec/check_disk -w 20 -c 10
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%
command[check_tcp]=/usr/local/nagios/libexec/check_tcp -p 80
3. 啓動nrpe服務
/usr/local/nagios/bin/nrpe –c /usr/local/nagios/etc/nrpe.cfg -d
八、windows2003配置
在http://sourceforge.net/projects/nscplus/裏下載nsclient++-0.3.8-win32.msi進行安裝。
進安裝目錄修改NSC.ini文件，在 [modules]部分的所在模塊前面的註釋“；”去掉，只保留CheckWMI.dll和RemoteConfiguration.dll這兩個不用去掉註釋；在 [Settings] 部分找到”allowed_hosts”選項，將前面的 “；”註釋去掉，並在後面加上監控服務器的IP；在 [NSClient] 部分找到“port=12489”這一行，並把前面的註釋去掉，這是NSClinet的默認監聽端口。
運行安裝目錄下的nsclient++.exet和nstray.exe文件。
在服務裏找到
把屬性中登錄選項的允許服務與桌面交互前的對勾打上，如下圖所示：
之後要在監控主機的commands.cfg中加入如下內容：
#'check_nt' command definition
define command{
command_name check_nt
command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v $ARG1$ $ARG2$
}
九、啓動服務查看結果
這時就可以在監控主機上啓動nagios和httpd服務查看結果了，如下圖所示：
