nagios添加主机和服务可能出现的问题有如下情况：
1：配置参数出现问题，如果你没有检查配置就启动nagios，可能会启动成功，但是显示会不正常；
解决方法：调整配置参数
2：Connection refused
当出现这个问题的时候，我开始以为是ssh的无密码登录没有成功，但是其实我的服务器没有启动该服务造成的，启动服务即可。但是这些是有端口的服务，没有使用端口的状态任何检测？使用nrpe，ok，我们现在在服务器上安装nrpe：
一、远程主机的配置
1、安装nrpe与配置
- fetch http://ufpr.dl.sourceforge.net/sourceforge/nagios/nrpe-2.5.2.tar.gz
- tar zxvf nrpe-2.5.2.tar.gz
- cd nrpe-2.5.2
- ./configure --enable-ssl --enable-command-args
- make all
- mkdir -p /usr/local/nagios/etc
- mkdir /usr/local/nagios/bin
- mkdir /usr/local/nagios/libexec
- pw addgroup nagios
- pw useradd nagios -g nagios -d /usr/local/nagios/ -s /sbin/nologin
- chown -R nagios:nagios /usr/local/nagios
- cp ./sample-config/nrpe.cfg /usr/local/nagios/etc
- cp src/nrpe /usr/local/nagios/bin
2、启动nrpe，端口为5666
- /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
- netstat -ant | grep 5666
- tcp4 0 0 *.5666 *.* LISTEN
二、监控服务器上的配置
1、安装nrpe(主要是使用check_nrpe模块)
- fetch http://ufpr.dl.sourceforge.net/sourceforge/nagios/nrpe-2.5.2.tar.gz
- tar zxvf nrpe-2.5.2.tar.gz
- cd nrpe-2.5.2
- ./configure --enable-ssl --enable-command-args
- make all
- cp src/check_nrpe /usr/local/nagios/libexec
2、nagios文件的配置
vi checkcommands.cfg
定义check_nrpe命令
- # 'check_nrep' command definition
- define command{
- command_name check_nrpe
- command_line /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
- }
三、上面我们已经配置了一部分参数
下面是配置的最终结果：
- define host{
- use generic-host ; Name of host template to use
- host_name test_nrpe
- alias client
- address 10.5.1.156
- check_command check-host-alive
- max_check_attempts 1
- check_period 24x7
- notification_interval 120
- notification_period 24x7
- notification_options d,r
- contact_groups admins
- }
- # 'check_load' command definition
- define command{
- command_name check_load
- command_line $USER1$/check_load -w $ARG1$ -c $ARG2$
- }
- # 'check_load' command definition
- define command{
- command_name check_disk
- command_line $USER1$/check_disk -w $ARG1$ -c $ARG2$
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description PING
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_ping!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description apache
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_http!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description mysql
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_mysql!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description ntp
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_ntp!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description qmail_smtp
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_smtp!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description qmail_pop3
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_pop!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description test_load
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_load!100.0,20%!500.0,60%
- }
- define service{
- use generic-service ; Name of service template to use
- host_name test_nrpe
- service_description test_disk
- is_volatile 0
- check_period 24x7
- max_check_attempts 1
- normal_check_interval 1
- retry_check_interval 1
- contact_groups admins
- notification_options w,u,c,r
- notification_interval 960
- notification_period 24x7
- check_command check_disk!100.0,20%!500.0,60%
- }
四、检查配置参数并重启nagios
如何在nagios中使用外部命令
- vi /usr/local/nagios/etc/nagios.cfg
- check_external_commands=1
- mkdir /usr/local/nagios/var/rw
- chown nagios.nagcmd /usr/local/nagios/var/rw
- chmod u+rw /usr/local/nagios/var/rw
- chmod g+rw /usr/local/nagios/var/rw
- chmod g+s /usr/local/nagios/var/rw
- svc -t /service/nagios/
- /usr/local/apache2/bin/apachectl restart
