安装nagios简单的应用
1--关闭服务器和selinux# chkconfigip6tables off# chkconfigiptables off# chkconfig --list|grep iptablesiptables 0:off1:off 2:off 3:off4:off 5:off 6:off# chkconfig --list|grep ip6tablesip6tables 0:off1:off 2:off 3:off4:off 5:off 6:off # vi /etc/selinux/config更改selinuxSELINUX=disabled重启服务器2--Nagios安装 - 服务端（192.168.1.151） 安装一个epel的扩展源# yum installepel-release （6.7前版本不支持）# wget -P/etc/yum.repos.d/http://mirrors.aliyun.com/repo/epel-6.repo安装扩展YUM源# yum install -y httpd nagiosnagios-plugins nagios-plugins-all nrpe nagios-plugins-nrpe安装主要组件及工具# htpasswd -c /etc/nagios/passwdnagiosadmin创建用户和密码# vim /etc/nagios/nagios.cfg# nagios -v /etc/nagios/nagios.cfg检测配置文件Total Warnings: 0Total Errors: 0启动服务# service httpd start# service nagios start浏览器访问： http://ip/nagios 2. Nagios安装 - 客户端（192.168.1.88）关闭服务器和selinux# chkconfigip6tables off# chkconfigiptables off# chkconfig --list|grep iptablesiptables 0:off1:off 2:off 3:off4:off 5:off 6:off# chkconfig --list|grep ip6tablesip6tables 0:off1:off 2:off 3:off4:off 5:off 6:off# vi /etc/selinux/config SELINUX=disabled重启服务器
# yum installepel-release （6.7前版本不支持）# wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-6.repo安装扩展YUM源#yum install -y nagios-pluginsnagios-plugins-all nrpe nagios-plugins-nrpe#vim /etc/nagios/nrpe.cfg找到“allowed_hosts=127.0.0.1” 改为 “allowed_hosts=127.0.0.1,192.168.1.108”allowed_hosts=127.0.0.1,192.168.1.108找到”dont_blame_nrpe=0”改为“dont_blame_nrpe=1” dont_blame_nrpe=1 # /etc/init.d/nrpe start
3. 监控中心（192.168.1.151）添加被监控主机（192.168.1.88） # cd /etc/nagios/conf.d/[root@nagiosconf.d]# vi 192.168.1.88.cfgdefine host{ use linux-server host_name 192.168.1.88 alias 1.88 address 192.168.1.88 } define service{ use generic-service host_name 192.168.1.88 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 192.168.1.88 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 192.168.1.88 service_description check_http check_command check_http max_check_attempts 5 normal_check_interval 1}备注：max_check_attempts 5 ；当nagios检测到问题时，一共尝试检测5次都有问题才会告警，如果该数值为1，那么检测到问题立即告警normal_check_interval 1 ；重新检测的时间间隔，单位是分钟，默认是3分钟notification_interval 60 ；在服务出现异常后，故障一直没有解决，nagios再次对使用者发出通知的时间。单位是分钟。如果你认为，所有的事件只需要一次通知就够了，可以把这里的选项设为0。 4--监控客户端硬盘，内存情况#由于需要nagios调用的监控命令都需要在command.cfg模块中定义而前面的check_nrpe在默认的command.cfg中时没有的这里需要在command.cfg中将其加入进去 # vim/etc/nagios/objects/commands.cfg定义check_nrpe编辑文件添加下面内容：define command{ command_name check_nrpe command_line $USER1$/check_nrpe-H $HOSTADDRESS$ -c $ARG1$ } [root@nagiosconf.d]# vi 192.168.1.88.cfg在监控的客户端配置中添加以下内容：define service{ use generic-service host_name 192.168.1.88 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 192.168.1.88 service_description check_disk_hda1 check_command check_nrpe!check_hda1 max_check_attempts 5 normal_check_interval 1}在客户端查看check_load，check_hda1服务#df -hFilesystem Size Used Avail Use% Mounted on/dev/sda3 18G 1.5G 16G10% /tmpfs 932M 0 932M 0% /dev/shm/dev/sda1 190M32M149M18% /boot/dev/sdb1 50G16G 32G33% /data#vi /etc/nagios/nrpe.cfg# /usr/lib64/nagios/plugins/check_disk -w 20%-c 10% -p /dev/sdb1# vi /etc/nagios/nrpe.cfgcommand=/usr/lib64/nagios/plugins/check_load-w 15,10,5 -c 30,25,20command=/usr/lib64/nagios/plugins/check_disk-w 20% -c 10% -p /dev/sdb1 5--服务器端配置邮件告警# vim /etc/nagios/objects/contacts.cfgdefine contact{ contact_name 123 use generic-contact alias xin email 15210603363@139.com } define contact{ contact_name 456 use generic-contact alias aaa email dslchair@qq.com } define contactgroup{ contactgroup_name common alias common members 123,456 }备注：define contactgroup定义组define contact 定义用户 然后在要需要告警的服务里面加上contactgroup define service{ use generic-service host_name 192.168.1.88 service_description check_ping check_command check_ping!100.0,20%!200.0,50% max_check_attempts 5 normal_check_interval 1 contact_groups common}
在需要告警的服务添加定义组
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