nagios 监控Linux 主机
假设监控机：192.168.0.10 server1被监控机：192.168.0.11 server2
此处简要的说明注意的几个点：
在server2上：
1、修改nrpe.cfg
监控主机的nagios是通过调用被监控机的nrpe来获取信息，那么我们先在被监控机的nrpe配置上添加要搜索的信息，也就是一些命令，然后nagios就通过nrpe调用这些命令来获取信息。这些命令是在nrpe.cfg文件中定义：
command=/usr/local/nagios/libexec/check_mysql -H localhost -u nagios -p nagios -P 3306
2、启动nrpe服务
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
3、测试下面命令是否能执行
/usr/local/nagios/libexec/check_mysql -H localhost -u nagios -p nagios -P 3306
在server1 上：
1、配置nagios监控主机的配置文件
/usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/commands.cfg #nagios可调用的监控命令
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg #联系人配置
cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg#监控时间配置
cfg_file=/usr/local/nagios/etc/objects/templates.cfg #模板配置
cfg_dir=/usr/local/nagios/etc/servers #新添加的目录，把需要添加的主机文件放进去，就不必在这里一行行添加
cfg_file=/usr/local/nagios/etc/objects/hostgroups.cfg #新添加，主机组配置
cfg_file=/usr/local/nagios/etc/objects/localhost.cfg #本地信息监迭
2、利用nrpe监控server2主机的本地信息
利用nrpe监控server2 主机的本地信息
首先是解决nagios怎么去调用nrpe命令，之前我们配置时有说过nagios调用的命令是从command.cfg文件中定义过的，那么要使用nrpe也须要在该文件中定义
nano command.cfg
在文件中添加以下配置
# 'check_nrpe' command definition
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
3、添加被监控机
创建server2的cfg文件在/usr/local/nagios/etc/servers目录下，并修改其
cp /usr/local/nagios/etc/objects/localhost.cfg/usr/local/nagios/etc/servers/192.168.0.11.cfg
nano 192.168.0.11.cfg
# HOST DEFINITION
# Define a host for the local machine
define host{
use linux-server ; Name of host template to use
; This host definition will inherit all variables that are defined
; in (or inherited by) the linux-server host template definition.
host_name 192.168.0.11
alias linux-server 11
address 192.168.0.11
}
define service{
use local-service ; Name of service template to use
host_name 192.168.0.11
service_description MySQL
check_command check_nrpe!check_mysql_status
# notifications_enabled 0
}
4、创建hostgroups.cfg
注释掉localhost 中的hostgroup ,在此文件中同意定义
nano hostgroups.cfg
###############################################################################
###############################################################################
# HOST GROUP DEFINITION
###############################################################################
###############################################################################
# Define an optional hostgroup for Linux machines
define hostgroup{
hostgroup_namelinux-servers ; The name of the hostgroup
alias Linux Servers ; Long name of the group
members localhost ; Comma separated list of hosts that belong to this group
}
define hostgroup{
hostgroup_namelinux-servers-jk ; The name of the hostgroup
alias Linux Servers Jk ; Long name of the group
members 192.168.0.11 ; Comma separated list of hosts that belong to this group
}
5、重启nagios
service nagios reload
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