上一节中完成了nagios的安装，这一节主要对nagios进行简单的配置。 一、NRPE的安装 nagios 在监控Linux主机时会要用到NRPE这个软件，工作原理如下图所示： tar xzf nrpe-2.12.tar.gz cd nrpe-2.12 ./configure make all make install-plugin make install-daemon make install-daemon-config 二、配置主机监控 一般主机监控配置都会存在一个hosts.cfg文件中，这里先在/usr/local/nagios/etc/目录下建立hosts.cgf文件之后写入如下内容： define host{ host_name nagios-server alias nagios server address 192.168.191.128 check_command check-host-alive max_check_attempts 5 check_period 24x7 contact_groups admins notification_interval 10 notification_period 24x7 notification_options d,u,r } define host{ host_name windows2003 alias windows2003 address 192.168.191.129 check_command check-host-alive max_check_attempts 5 check_period 24x7 contact_groups admins notification_interval 10 notification_period 24x7 notification_options d,u,r } define host{ host_name linux alias linux address 192.168.191.130 check_command check-host-alive max_check_attempts 5 check_period 24x7 contact_groups admins notification_interval 10 notification_period 24x7 notification_options d,u,r } define hostgroup{ hostgroup_name sa-servers alias sa servers members nagios-server,windows2003,linux } 三、配置服务监控 和主机监控配置一样，服务配置也要存在一个services.cfg文件中，同样在/usr/local/nagios/etc/目录下建立services.cfg文件之后加入如下内容： define service{ host_name nagios-server service_description check-host-alive check_command check-host-alive max_check_attempts 5 normal_check_interval 5 retry_check_interval 2 check_period 24x7 notification_interval 10 notification_period 24x7 notification_options w,u,c,r contact_groups admins } define service{ host_name nagios-server service_description check_tcp 80 check_period 24x7 max_check_attempts 4 normal_check_interval 3 retry_check_interval 2 contact_groups admins notification_interval 10 notification_period 24x7 notification_options w,u,c,r check_command check_tcp!80 } define service{ host_name nagios-server service_description cpu load check_command check_nrpe!check_load check_period 24x7 max_check_attempts 4 normal_check_interval 3 retry_check_interval 2 contact_groups admins notification_interval 10 notification_period 24x7 notification_options w,u,c,r } define service{ host_name nagios-server service_description total-procs check_command check_nrpe!check_total_procs check_period 24x7 max_check_attempts 4 normal_check_interval 3 retry_check_interval 2 contact_groups admins notification_interval 10 notification_period 24x7 notification_options w,u,c,r } define service{ host_name nagios-server service_description check_df check_command check_nrpe!check_df check_period 24x7 max_check_attempts 4 normal_check_interval 3 retry_check_interval 2 contact_groups admins notification_interval 10 notification_period 24x7 notification_options w,u,c,r } define service{ host_name nagios-server service_description check_ips check_command check_nrpe!check_ips check_period 24x7 max_check_attempts 4 normal_check_interval 3 retry_check_interval 2 contact_groups admins notification_interval 10 notification_period 24x7 notification_options w,u,c,r } 这里只给出nagios-server主机中服务的监控配置，其他两个被监控主机配置基本相同这里就不再给出。 四、配置nagios主配置文件nagios.cfg 这样只给出需要改的项目： cfg_file=/usr/local/nagios/etc/objects/commands.cfg cfg_file=/usr/local/nagios/etc/objects/contacts.cfg cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg cfg_file=/usr/local/nagios//etc/objects/templates.cfg cfg_file=/usr/local/nagios/etc/hosts.cfg cfg_file=/usr/local/nagios/etc/services.cfg #cfg_file=/usr/local/nagios//etc/objects/localhost.cfg 五、配置联系人文件contacts.cfg define contact{ contact_name nagiosadmin alias Nagios Admin service_notification_period 24x7 host_notification_period 24x7 service_notification_options w,u,c,r host_notification_options d,u,r service_notification_commands notify-by-email,service-notify-by-fx host_notification_commands host-notify-by-email,host-notify-by-fx email abc@mail.com pager 13800138000 } define contactgroup{ contactgroup_name admins alias Nagios Administrators members nagiosadmin } 六、NRPE配置 vi /usr/local/nagios/etc/nrpe.cfg server_address=192.168.191.128 allowed_hosts=127.0.0.1,192.168.191.128 command[check_users]=/usr/local/nrpe/libexec/check_users -w 5 -c 10 command[check_load]=/usr/local/nrpe/libexec/check_load -w 15,10,5 -c 30,25,20 #command[check_hda1]=/usr/local/nrpe/libexec/check_disk -w 20 -c 10 -p /dev/hda1 // 注释掉 command[check_df]=/usr/local/nrpe/libexec/check_disk -w 20 -c 10 // 添加这一行，监控整个磁盘利用率 command[check_zombie_procs]=/usr/local/nrpe/libexec/check_procs -w 5 -c 10 -s z command[check_total_procs]=/usr/local/nrpe/libexec/check_procs -w 150 -c 200 command[check_ips]=/usr/local/nrpe/libexec/ip_conn.sh 8000 10000 // 监控 ip 连接数 启动 nrpe 服务 # /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d 七、被监控Linux主机配置 1. 安装相关软件 useradd nagios -s /sbin/nologin tar xvf nagios-plugins-1.4.14.tar.gz cd nagios-plugins-1.4.14 ./configure --prefix=/usr/local/nagios make make install chown –R nagios:nagios /usr/local/nagios chown –R nagios:nagios /usr/local/nagios/libexec tar xzf nrpe-2.12.tar.gz cd nrpe-2.12 ./configure make all make install-plugin make install-daemon make install-daemon-config 2. allowed_hosts=127.0.0.1,192.168.191.128 // 允许监控服务器访问，中间用逗号隔开； # 修改 NRPE 的监控命令，添加相应的命令； # The following examples use hardcoded command arguments... command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10 command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20 #command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1 command[check_df]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200 command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10% command[check_tcp]=/usr/local/nagios/libexec/check_tcp -p 80 3. 启动nrpe服务 /usr/local/nagios/bin/nrpe –c /usr/local/nagios/etc/nrpe.cfg -d 八、windows2003配置 在http://sourceforge.net/projects/nscplus/ 里下载nsclient++-0.3.8-win32.msi进行安装。 进安装目录修改NSC.ini文件，在 [modules]部分的所在模块前面的注释“；”去掉，只保留CheckWMI.dll和RemoteConfiguration.dll这两个不用去掉注释；在 [Settings] 部分找到”allowed_hosts”选项，将前面的 “；”注释去掉，并在后面加上监控服务器的IP；在 [NSClient] 部分找到“port=12489”这一行，并把前面的注释去掉，这是NSClinet的默认监听端口。 运行安装目录下的nsclient++.exet和nstray.exe文件。 在服务里找到 把属性中登录选项的允许服务与桌面交互前的对勾打上，如下图所示： 之后要在监控主机的commands.cfg中加入如下内容： #'check_nt' command definition define command{ command_name check_nt command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v $ARG1$ $ARG2$ } 九、启动服务查看结果 这时就可以在监控主机上启动nagios和httpd服务查看结果了，如下图所示：
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