所有都是yum安装：

1.  # vim /etc/nagios/nagios.cfg

添加主机配置文件到主配置文件

cfg_file=/etc/nagios/objects/localhost.cfg

cfg_file=/etc/nagios/objects/172.16.1.1.cfg

2.  # vim /etc/nagios/objects/commands.cfg

添加 check_nrpe 命令到 commands.cfg

define command{

    command_name   check_nrpe

    command_line   $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

    }

3. 主机配置模版：

# cat  172.16.10.134.cfg

define host{

    use           linux-server

    host_name        172.16.1.1

    alias          172.16.1.1

    address         172.16.1.1

    }

define service{

    use           generic-service

    host_name        172.16.1.1

    service_description   check_ping

    check_command      check_ping!100.0,20%!200.0,50%

    max_check_attempts    5

    normal_check_interval  1

    }

define service{

    use           generic-service

    host_name        172.16.1.1

    service_description   check_ssh

    check_command      check_ssh

    max_check_attempts    5

    normal_check_interval  1

    notification_interval  60

    }

define service{

    use           generic-service

    host_name        172.16.1.1

    service_description   check_http

    check_command      check_http

    max_check_attempts    5

    normal_check_interval  1

    notification_interval  60

}

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       Root Partition

    check_command          check_local_disk!20%!10%!/

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       Current Users

    check_command          check_local_users!20!50

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       Total Processes

    check_command          check_local_procs!450!500!RSZDT

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       Current Load

    check_command          check_local_load!5.0,4.0,3.0!10.0,6.0,4.0

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       Swap Usage

    check_command          check_local_swap!20!10

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       check_load

    check_command          check_nrpe!check_load

    max_check_attempts        5

    normal_check_interval      1

}

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       check_disk_opt

    check_command          check_nrpe!check_opt

    max_check_attempts        5

    normal_check_interval      1

}

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       port 145

    check_command          check_tcp!145

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       port 110

    check_command          check_tcp!110

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       port 106

    check_command          check_tcp!106

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       port 107

    check_command          check_tcp!107

    }

define service{

    use               generic-service

    host_name            172.16.1.1

    service_description       check_mem

    check_command          check_nrpe!check_mem

    max_check_attempts        5

    normal_check_interval      1

}

[root@local objects]#

客户端：

[root@local plugins]# vim /etc/nagios/nrpe.cfg

command[check_users]=/usr/lib64/nagios/plugins/check_users -w 5 -c 10

command[check_load]=/usr/lib64/nagios/plugins/check_load -w 15,10,5 -c 30,25,20

command[check_hda1]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/hda1

command[check_opt]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/mapper/all--data-data01

command[check_zombie_procs]=/usr/lib64/nagios/plugins/check_procs -w 5 -c 10 -s Z

command[check_total_procs]=/usr/lib64/nagios/plugins/check_procs -w 150 -c 200

command[check_mem]=/usr/lib64/nagios/plugins/check_mem.sh -w 150 -c 100

# cat /usr/lib64/nagios/plugins/check_mem.sh

#!/bin/bash

TOTAL=`free -m | head -2 |tail -1 |gawk '{print $2}'`

# Free memory

FREE=`free -m | head -2 |tail -1 |gawk '{print $4}'`

# to calculate free percent

# use the expression  free * 100 / total

FREETMP=`expr $FREE \* 100`

PERCENT=`expr $FREETMP / $TOTAL`

echo "$FREE MB ($PERCENT%) Free Memory"

exit 0

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