nagios自定义脚插件开发

假设我们开发一个监听远程服务器硬盘空间大小的插件
1.在nagios目录libexec下添加可执行脚本check_remote_disk.sh:

out=`ssh root@$1  '/opt/nagios/check_disk -w 10% -c 5% -p / -w 10% -c 5%  -p /home  -w 10% -c 5% -p /opt -w 10% -c 5% -p /var/log'`
result=`echo $out | grep "DISK OK"`
if [ "$result" = "" ]; then
        echo $out
        exit 2
else
        echo $out
        exit 0
fi

2.将nagios下面的libexec拷贝至远程服务器/opt/nagios，并设置免密码登录至该远程服务器上；
3.etc/objetcs/commands.cfg添加：

define command{
        command_name    remote_disk_check
        command_line    $USER1$/check_remote_disk.sh $HOSTADDRESS$
}

4.etc/objects/自定义.cfg添加：

define service{
        use                             generic-service
        hostgroup_name                  server1 #我自己定义的host-group
        service_description             remote_disk_check
        check_command                   remote_disk_check
        normal_check_interval           5
        retry_check_interval            5
}

5.重启nagios.

PS：
nagios自定义插件返回码：
Return Code     Service State     Host State
0                   OK              UP
1                   WARNING         UP or DOWN/UNREACHABLE*
2                   CRITICAL        DOWN/UNREACHABLE
3                   UNKNOWN         DOWN/UNREACHABLE

nagios脚本排错：
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg