nagios客户端nrpe的安装

安装nrpe的过程：

安装nrpe客户端：
[root@svr1 ~]# useradd nagios

[root@svr1 ~]# tar -xzf nagios-plugins-1.4.15.tar.gz
[root@svr1 ~]# cd nagios-plugins-1.4.15
[root@svr1 nagios-plugins-1.4.15]# ./configure
[root@svr1 nagios-plugins-1.4.15]# make && make install

[root@svr1 ~]# tar -xzf nrpe-2.12.tar.gz
[root@svr1 ~]# cd nrpe-2.12
[root@svr1 nrpe-2.12]# ./configure
*** Configuration summary for nrpe 2.12 03-10-2008 ***:

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

[root@svr1 nrpe-2.12]# make all && make install-plugin
cd ./src/ && make install-plugin
make[1]: Entering directory `/root/nrpe-2.12/src'
/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/libexec
/usr/bin/install -c -m 775 -o nagios -g nagios check_nrpe /usr/local/nagios/libexec
make[1]: Leaving directory `/root/nrpe-2.12/src'
[root@svr1 nrpe-2.12]# make install-daemon
cd ./src/ && make install-daemon
make[1]: Entering directory `/root/nrpe-2.12/src'
/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/bin
/usr/bin/install -c -m 775 -o nagios -g nagios nrpe /usr/local/nagios/bin
make[1]: Leaving directory `/root/nrpe-2.12/src'
[root@svr1 nrpe-2.12]# make install-daemon-config
/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc
/usr/bin/install -c -m 644 -o nagios -g nagios sample-config/nrpe.cfg /usr/local/nagios/etc
[root@svr1 nrpe-2.12]# make install-xinetd
/usr/bin/install -c -m 644 sample-config/nrpe.xinetd /etc/xinetd.d/nrpe

[root@svr1 nrpe-2.12]# vim /etc/xinetd.d/nrpe
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
        flags           = REUSE
        socket_type     = stream
        port            = 5666
        wait            = no
        user            = nagios
        group           = nagios
        server          = /usr/local/nagios/bin/nrpe
        server_args     = -c /usr/local/nagios/etc/nrpe.cfg --inetd
        log_on_failure  += USERID
        disable         = no
        only_from       = 10.1.1.40
}

[root@svr1 nrpe-2.12]# service xinetd restart
Stopping xinetd: [  OK  ]
Starting xinetd: [  OK  ]
[root@svr1 nrpe-2.12]# chkconfig --list | grep nrpe
        nrpe:           on
[root@svr1 nrpe-2.12]# netstat -tnlp | grep nrpe
tcp        0      0 0.0.0.0:5666                0.0.0.0:*                   LISTEN      25360/nrpe


[root@svr1 nrpe-2.12]# vim /usr/local/nagios/etc/nrpe.cfg
修一行：
allowed_hosts=127.0.0.1,10.1.1.40

本机测试！
[root@svr1 nrpe-2.12]# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
[root@svr1 nrpe-2.12]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_load
OK - load average: 0.00, 0.00, 0.00|load1=0.000;15.000;30.000;0; load5=0.000;10.000;25.000;0;

load15=0.000;5.000;20.000;0;

备注：有时候在客户端本机上测试时，发现会报错。CHECK_NRPE: Error - Could not complete SSL handshake.
这个时候，注意下xinetd.d/nrpe 以及nrpe.conf 里关于allowed相关的选项，另外就是防火墙。
使用xinetd后发现重启xinetd并不能重启nrpe,只有将其 T掉然后再开。

从远程主机上测试下：
[root@svr4 ~]# /usr/local/nagios/libexec/check_nrpe -H 10.1.1.10 -c check_total_procs
PROCS CRITICAL: 249 processes

监控一下客户机的81，82服务吧！详见下篇