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第一步： 安装软件：分为nagios监控端和nagios被监控端 监控端软件列表 [ /uploads/img/201511/05030030_5Yxe.jpg] [/url] Nagios安装包[ /uploads/img/201511/05030030_tg29.jpg] [/url] Nagios插件安装包[ /uploads/img/201511/05030030_SXjZ.jpg] [/url] Nagios中文支持包[ /uploads/img/201511/05030030_T7ZK.jpg] [/url] Nrpe软件包[ /uploads/img/201511/05030030_TvLO.jpg] [/url] nagios通过nrpe来远端管理服务 1. nagios执行安装在它里面的check_nrpe 插件，并告诉check_nrpe 去检测哪些服务。 nagios培训 2. 通过ssl，check_nrpe 连接远端机子上的nrpe daemon 3. nrpe运行本地的各种插件去检测本地的服务和状态 4. nrpe把检测的结果传给主机端的check_nrpe， 主机端的check_nrpe再把结果送到nagios状态队列中。 5. nagios 依次读取队列中的信息，再把结果显示出来。 解决编译软件时需要的依赖 [root[ /licomernwater]@www[/url] ~]# yum install -y gcc glibc glibc-common gd gd-devel xinetd openssl-devel 添加nagios用户 添加目录 mkdir /usr/local/nagios 修改权限 chown -R nagios.nagios /usr/local/nagios 解压软件包 tar -xzvf nagios-3.2.0.tar.gz 开始安装1. ./configure --prefix=/usr/local/nagios 2. make all 3. make install 4. make install-init 5. make install-commandmode 6. make install-config 7. chkconfig --add nagios 8. chkconfig --level 35 nagios on 9. tar -xzvf nagios-plugins-1.4.14.tar.gz 10. ./configure --prefix=/usr/local/nagios 11. make && make install 12. yum install httpd 13. yum install php 14. vim /etc/httpd/conf/httpd.conf 添加以下内容 [ /uploads/img/201511/05030030_VizB.jpg] [/url] 修改用户 [ /uploads/img/201511/05030030_rUum.jpg] [/url] 15. 添加密码 htpasswd -c /usr/local/nagios/etc/htpasswd oracle 16. /etc/init.d/httpd start 17. tar -xjvf nagios-cn-3.2.0.tar.bz2 18. ./configure 19. make && make install 监控端nagios安装完毕 重启httpd和启动nagios 可以看到以下画面 [ /uploads/img/201511/05030030_DmRk.jpg] [/url] 这里你要输入刚才设置的用户和密码
在没有修改配置的情况下，默认只能查看到本机 [ /uploads/img/201511/05030031_Eehy.jpg] [/url] 好的 下面来添加主机 会用到以下几个文件，其他文件就由各位下去自己慢慢研究了，我手懒 [ /uploads/img/201511/05030031_Lnd6.jpg] [/url] 其中以下两个文件需要手动创建 [ /uploads/img/201511/05030031_8PXl.jpg] [/url] 定义被监控主机 [root[ /licomernwater]@www[/url] objects]# cat hosts.cfg define host{ use linux-server 使用templates.cfg定义的 host_name Nagios-Linux 自己取的名字并不一定是主机名 nagios实施 alias Nagios-Linux 别名 address 192.168.1.201 被监控主机 } 定义监控内容也就是监控命令 [root[ /licomernwater]@www[/url] objects]# cat services.cfg define service{ use local-service host_name Nagios-Linux service_description Current Load check_command check_nrpe!check_load } define service{ use local-service host_name Nagios-Linux service_description Check Disk sda1 check_command check_nrpe!check_sda1 } define service{ use local-service host_name Nagios-Linux service_description Total Processes check_command check_nrpe!check_total_procs } define service{ use local-service host_name Nagios-Linux service_description Current Users check_command check_nrpe!check_users } define service{ use local-service host_name Nagios-Linux service_description Check Zombie Procs check_command check_nrpe!check_zombie_procs } define service{ use local-service host_name Nagios-Linux service_description Check Swap check_command check_nrpe!check_swap } define service{ use local-service host_name Nagios-Linux service_description HTTP check_command check_nrpe!check_http } define service{ use local-service host_name Nagios-Linux service_description MYSQL check_command check_nrpe!check_mysql } define service{ use local-service host_name Nagios-Linux service_description MYLOG check_command check_nrpe!check_mylog 被监控端主机安装nrep、nagi-plugin软件包 与监控端安装类似，注意最好是以xinetd的方式来启动 安装nrep 161 ./configure 162 make all 163 make install-plugin 164 make install-daemon-config 165 make install-xinetd vim /etc/xinetd.d/nrpe # default: on # description: NRPE (Nagios Remote Plugin Executor) service nrpe { flags = REUSE socket_type = stream port = 5666 wait = no user = nagios group = nagios server = /usr/local/nagios/bin/nrpe server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd 监控软件 log_on_failure += USERID disable = no only_from = 127.0.0.1 192.168.1.200#服务器地址 测试 /usr/local/nagios/libexec/check_nrpe -H localhost [root[ /licomernwater]@www[/url] libexec]# vim /usr/local/nagios/etc/nrpe.cfg log_facility=daemon pid_file=/var/run/nrpe.pid server_port=5666 nrpe_user=nagios nrpe_group=nagios allowed_hosts=127.0.0.1 dont_blame_nrpe=0 debug=0 command_timeout=60 connection_timeout=300 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_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1 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_http]=/usr/local/nagios/libexec/check_http -I 127.0.0.1 command[check_mysql]=/usr/local/nagios/libexec/check_mysql command[check_mylog]=/usr/local/nagios/libexec/check_mylog 自己定义的插件 [root[ /licomernwater]@www[/url] libexec]# cat check_mylog #!/bin/bash # # myfiles="`date +%F`.txt" count=`sed -n '/fail/p' /tmp/$myfiles|wc -l` if [ $count -eq 0 ];then echo "MYLOG IS OK" exit 0 elif [ $count -ge 1 -a $count -le 10 ] ;then echo "MYLOG IS WARNING" exit 1 elif [ $count -ge 11 ];then echo "MYLOG IS CRITICAL" exit 2 elif [ $count -lt 0 ];then echo "UNKNOWN" exit 3 If 0 表示OK 1 表示WARNNING 2 表示 CRITICAL 3 表示UNKNOWN 在服务端的services.cfg中使用这两个自己定义的插件 define service{ use local-service host_name Nagios-Linux service_description MYSQL check_command check_nrpe!check_mysql } define service{ use local-service host_name Nagios-Linux service_description MYLOG check_command check_nrpe!check_mylog 最后要在command.cfg中加入check_nrpe命令 # 'check_nrpe' command definition define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ nagios配置 } 重启服务端服务 [ /uploads/img/201511/05030031_blx2.jpg] [/url] 就会出现我们定义的主机 [ /uploads/img/201511/05030031_cUAn.jpg] [/url] 例如我现在关闭mysql [ /uploads/img/201511/05030031_YScC.jpg] [/url] [ /uploads/img/201511/05030031_xVPi.jpg] [/url] 这里就可以看到mysql的监控状态为紧急 现在恢复mysql [ /uploads/img/201511/05030031_Zdag.jpg] [/url] [ /uploads/img/201511/05030031_wvKW.jpg] [/url] 可以看到mysql监控状态为ok 下面我来实现故障告警功能 使用邮件告警 [root@www objects]# cat contacts.cfg ############################################################################### # CONTACTS.CFG - SAMPLE CONTACT/CONTACTGROUP DEFINITIONS # # Last Modified: 05-31-2007 # # NOTES: This config file provides you with some example contact and contact # group definitions that you can reference in host and service # definitions. # # You don't need to keep these definitions in a separate file from your 开源监控软件 # other object definitions. This has been done just to make things # easier to understand. # ############################################################################### ############################################################################### ############################################################################### # # CONTACTS # ############################################################################### ############################################################################### # Just one contact defined by default - the Nagios admin (that's you) # This contact definition inherits a lot of default values from the 'generic-contact' # template which is defined elsewhere. define contact{ contact_name nagiosadmin use generic-contact alias Nagios Admin
service_notification_period 24x7 host_notification_period 24x7 service_notification_options w,u,c,r,f,s host_notification_options d,u,r,f,s service_notification_commands notify-service-by-email host_notification_commands notify-host-by-email } ############################################################################### ############################################################################### # # CONTACT GROUPS # ############################################################################### ############################################################################### # We only have one contact in this simple configuration file, so there is # no need to create more than one contact group. define contactgroup{ contactgroup_name admins alias Nagios Administrators members nagiosadmin } [root@www objects]# tail -20 services.cfg } define service{ use local-service host_name Nagios-Linux service_description HTTP check_command check_nrpe!check_http } define service{ use local-service host_name Nagios-Linux service_description MYSQL check_command check_nrpe!check_mysql contact_groups admins } define service{ use local-service host_name Nagios-Linux service_description MYLOG check_command check_nrpe!check_mylog } Cat command.cfg # 'notify-host-by-email' command definition define command{ command_name notify-host-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$ } # 'notify-service-by-email' command definition nagios安装 define command{ command_name notify-service-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$ } 默认是配置好了这里就不用配置 直接在contact和services中使用就好了 把mysql停了 [ /uploads/img/201511/05030032_cpxO.jpg] [/url]
验证成功，但是要注意需要把发件人的地址设置为白名单才可以收到 [ /uploads/img/201511/05030032_dWR4.jpg] [/url] 由于是手机邮件就实现了邮件短信同时提醒的功能，当然有邮件达到短信提醒的邮箱都能实现这个功能不一定是手机邮箱
想做Nagios， Zabbix,Cacti,iTop各种交流的，可以进入开源监控工具Nagios交流 QQ群号 ：476809427 | 
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