Nagios遠(yuǎn)程監(jiān)控

1.添加用戶

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[root@server3 ~]# useradd nagios
2.安裝nagios-plugins

[root@server3 ~]# tar zxf nagios-plugins-2.0.3.tar.gz
[root@server3 nagios-plugins-2.0.3]# ./configure --with-nagios-user=nagios --with
     --with-apt-get-command:
              --with-ping6-command: /bin/ping6 -n -U -w %d -c %d %s
               --with-ping-command: /bin/ping -n -U -w %d -c %d %s
                       --with-ipv6: yes
                      --with-MySQL: /usr/bin/mysql_config
                    --with-openssl: yes
                     --with-gnutls: no
               --enable-extra-opts: yes
                       --with-perl: /usr/bin/perl
             --enable-perl-modules: no
                     --with-cgiurl: /nagios/cgi-bin
               --with-trusted-path: /bin:/sbin:/usr/bin:/usr/sbin
                   --enable-libtap: no
[root@server3 nagios-plugins-2.0.3]# make && make install

[root@server3 nagios]# pwd
/usr/local/nagios
[root@server3 nagios]# chown -R nagios.nagios *

3.安裝 NRPE

[root@server3 ~]# tar zxf nrpe-2.15.tar.gz

[root@server3 nrpe-2.15]# ./configure

General Options:
-------------------------
NRPE port:    5666
NRPE user:    nagios
NRPE group:   nagios
Nagios user: nagios
Nagios group: nagios

[root@server3 nrpe-2.15]# make all

4.安裝插件、daemon和示例配置文件

#安裝nrpe-plugin插件
[root@server3 nrpe-2.15]# make install-plugin

#安裝nrpe daemon

[root@server3 nrpe-2.15]# make install-daemon
#安裝daemon配置文件

[root@server3 nrpe-2.15]# make install-daemon-config

#安裝xinetd腳本,NRPE daemon是作為xinetd下的一個(gè)服務(wù)來運(yùn)行的，所以先安裝好xinetd

[root@server3 nrpe-2.15]# yum install -y xinetd

[root@server3 nrpe-2.15]# make install-xinetd

4.修改配置文件

[root@server3 nrpe-2.15]# vim /etc/xinetd.d/nrpe #添加nagios服務(wù)端的地址

only_from = 172.25.16.2 #nagios 主機(jī) ip 地址

[root@server3 ~]# vim /usr/local/nagios/etc/nrpe.cfg

allowed_hosts=172.25.16.2 #允許監(jiān)測(cè)主機(jī)的IP

5.編輯/etc/services文件，增加NRPE服務(wù)

nrpe 5666/tcp #nrpe

6.重啟服務(wù)

[root@server3 nrpe-2.15]# /etc/init.d/xinetd restart

[root@server3 nrpe-2.15]# netstat -antlp | grep 5666 #NRPE已經(jīng)啟動(dòng)
tcp 0 0 :::5666 :::* LISTEN 22872/xinetd

#在監(jiān)控主機(jī)上

1.安裝NRPE，只需要check_nrpe插件，可直接從被監(jiān)測(cè)端copy

[root@server3 libexec]# scp check_nrpe 172.25.16.2:/usr/local/nagios/libexec/

[root@server2 libexec]# chown nagios.nagios check_nrpe
[root@server2 libexec]# ll check_nrpe
-rwxr-xr-x. 1 nagios nagios 76769 Aug 29 23:36 check_nrpe
[root@server2 libexec]# ./check_nrpe -H 172.25.16.3 #輸出nrpe的版本，說明監(jiān)測(cè)機(jī)check_nrpe與被監(jiān)測(cè)主機(jī)運(yùn)行的nrpe daemon之間建立聯(lián)系
NRPE v2.15
[root@server2 libexec]# vim /usr/local/nagios/etc/objects/commands.cfg

    # 'check_nrpe'
    define command{
            command_name    check_nrpe
          command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c "$ARG1$" #-c后面的參數(shù)是傳給被監(jiān)測(cè)端nrpe daemon要執(zhí)行的監(jiān)測(cè)命令，這些命令在nrpe.cfg中要求已經(jīng)定義

}
[root@server3 ~]# grep -v '^#' /usr/local/nagios/etc/nrpe.cfg | sed '/^$/d'
log_facility=daemon
pid_file=/var/run/nrpe.pid
server_port=5666
nrpe_user=nagios
nrpe_group=nagios
allowed_hosts=172.25.16.2
dont_blame_nrpe=0
allow_bash_command_substitution=0
debug=0
command_timeout=60
connection_timeout=300
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_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /
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

[root@server2 libexec]# vim /usr/local/nagios/etc/objects/services.cfg #在這個(gè)里面定義的服務(wù)命令完全根據(jù)在被監(jiān)控端nrpe.cfg中內(nèi)置命令定義的，如上面命令所示

define service{
        use generic-service
        host_name server3.example.com
        service_description CPU Load
        check_command check_nrpe!check_load
        }
define service{
        use generic-service
        host_name server3.example.com
        service_description Current Users
        check_command check_nrpe!check_users
}

define service{
        use generic-service
        host_name server3.example.com
        service_description / Free Space
        check_command check_nrpe!check_disk
}
define service{
        use generic-service
        host_name server3.example.com
        service_description Total Processes
        check_command check_nrpe!check_total_procs
}

define service{
        use generic-service
        host_name server3.example.com
        service_description Zombie Processes
        check_command check_nrpe!check_zombie_procs
}

#監(jiān)測(cè)是否有語法錯(cuò)誤并測(cè)試

[root@server2 libexec]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
[root@server2 objects]#/usr/local/nagios/libexec/check_nrpe -H 172.25.16.3 -c check_load

OK - load average: 0.08, 0.02, 0.01|load1=0.080;15.000;30.000;0; load5=0.020;10.000;25.000;0; load15=0.010;5.000;20.000;0;

[root@server2 objects]# /usr/local/nagios/libexec/check_nrpe -H 172.25.16.3 -c check_users
USERS OK - 1 users currently logged in |users=1;5;10;0

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