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        参照netseek的pdf,centos6 64bit
- nagios 安装步骤
 - 1在做安装之前确认要对该机器拥有root 权限。
 - 确认你安装好的linux 系统上已经安装如下软件包再继续。
 - Apache
 - GCC 编译器
 - GD库与开发库
 - yum -y install httpd gcc glibc glibc-common gd gd-devel
 - 2
 - 建立nagios 账号
 - /usr/sbin/useradd nagios && passwd nagios
 - 创建一个用户组名为nagcmd用于从Web 接口执行外部命令
 - 用户都加到这个组中
 - /usr/sbin/groupadd nagcmd
 - /usr/sbin/usermod ‐ G nagcmd nagios
 - /usr/sbin/usermod ‐ G nagcmd apache
 - 3
 - 下载nagios 和插件程序包
 - 下载Nagios 和Nagios 插件的软件包( 访问http://www.nagios.org/download/站点以获得最
 - 新版本)
 - cd /usr/local/src
 - wget http://nchc.dl.sourceforge.net/sourceforge/nagios/nagios-3.0.6.tar.gz
 - wget http://nchc.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.13.tar.gz
 - 4
 - 编译与安装nagios
 - cd /usr/local/src
 - tar zxvf nagios-3.0.6.tar.gz
 - cd nagios-3.0.6
 - ./configure --with-command-group=nagcmd --prefix=/usr/local/nagios
 - make all
 - make install
 - make install-init
 - make install-config
 - make install-commandmode
 - 验证程序是否被正确安装。切换目录到安装路径(这里是/usr/local/nagios),看是否存在
 - etc、bin、 sbin、 share、 var 这五个目录,如果存在则可以表明程序被正确的安装到系
 - 统了。后表是五个目录功能的简要说明:
 - 5
 - 编译并安装nagios 插件 nagios-plugins
 - cd /usr/local/src
 - tar zxvf nagios-plugins-1.4.13.tar.gz
 - cd nagios-plugins-1.4.13
 - ./configure --with-nagios-user=nagios --with-nagios-group=nagios --prefix=/usr/local/nagios
 - make && make install
 - 验证:
 - ls /usr/local/nagios/libexec
 - 会显示安装的插件文件,即所有的插件都安装在 libexec 这个目录下
 - 6配置WEB 接口
 - 方法一:直接在安装nagios 时 make install ‐ webconf
 - 创建一个nagiosadmin的用户用于Nagios 的WEB 接口登录。记下你所设置的登录口
 - 令,一会儿你会用到它。
 - htpasswd ‐ c /usr/local/nagios/etc/htpasswd.users nagiosadmin
 - 重启Apache服务以使设置生效。
 - service httpdrestart
 - 方法二:在httpd.conf最后添加如下内容:
 - #for nagios
 - ScriptAlias /nagios/cgi-bin /usr/local/nagios/sbin
 - <Directory "/usr/local/nagios/sbin">
 - Options ExecCGI
 - AllowOverride None
 - Order allow,deny
 - Allow from all
 - AuthName "Nagios Access"
 - AuthType Basic
 - AuthUserFile /usr/local/nagios/etc/htpasswd
 - Require valid-user
 - </Directory>
 - Alias /nagios /usr/local/nagios/share
 - <Directory "/usr/local/nagios/share">
 - Options None
 - AllowOverride None
 - Order allow,deny
 - Allow from all
 - AuthName "Nagios Access"
 - AuthType Basic
 - AuthUserFile /usr/local/nagios/etc/htpasswd
 - Require valid-user
 - </Directory>
 - htpasswd ‐ c /usr/local/nagios/etc/htpasswd test
 - New password: (输入123456)
 - Re‐ type new password: (再输入一次密码)
 - Adding password for user test
 - 查看认证文件的内容
 - less /usr/local/nagios/etc/htpasswd
 - test:OmWGEsBnoGpIc 前半部分是用户名test, 后面是加密后的密码
 - 本例添加的是 test 用户名,需要改 cgi.cfg 配置文件,允许test 用户
 - vi /usr/local/nagios/etc/cgi.cfg
 - authorized_for_system_information=test
 - authorized_for_configuration_information=test
 - authorized_for_system_commands=test
 - authorized_for_all_services=test
 - authorized_for_all_hosts=nagiosadmin,test
 - authorized_for_all_ service_commands=test
 - authorized_for_all_host_commands=test
 - 7
 - 启动nagios
 - 把Nagios 加入到服务列表中以使之在系统启动时自动启动
 - chkconfig ‐‐ add nagios
 - chkconfig nagios on
 - 验证Nagios 的样例配置文件
 - /usr/local/nagios/bin/nagios ‐ v /usr/local/nagios/etc/nagios.cfg
 - 有可能
 - Nagios 3.0.6
 - Copyright (c) 1999-2008 Ethan Galstad (http://www.nagios.org)
 - Last Modified: 12-01-2008
 - License: GPL
 - Error: Cannot open main configuration file '/usr/local/‐' for reading! 然后赋予权限也不行 直接重启nagios服务 启动即可
 - Nagios 3.0.6 starting... (PID=2821)
 - Local time is Thu Feb 16 14:24:25 CST 2012
 - Bailing out due to one or more errors encountered in the configuration files. Run Nagios from the command line with the -v option to verify your config before restarting. (PID=2821)
 - 如果没有报错,可以启动Nagios 服务
 - service nagios start
 - service httpd start
 - 8 setenforce 0(执行这个命令就可了)
 - 令SELinux处于容许模式
 - setenforce 0
 - 如果要永久性更变它,需要更改/etc/selinux/config 里的设置并重启系统。
 - 不关闭SELinux或是永久性变更它的方法是让 CGI 模块在SELinux下指定强制目标模式:
 - chcon‐ R‐ t httpd_sys_content_t /usr/local/nagios/sbin/
 - chcon‐ R‐ t httpd_sys_content_t /usr/local/nagios/share/
 - 9
 - 测试
 - 登录 http://localhost/nagios/ 输入用户名test和密码123456就可以正常登录了
 - 十 如何配置监控远程主机
 - 1 在被监控主机上
 - 增加用户
 - useradd nagios
 - 设置密码
 - passwd nagios
 - 安装nagios插件
 - wget http://nchc.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.13.tar.gz
 - tar zxvf nagios-plugins-1.4.13.tar.gz
 - cd nagios-plugins-1.4.13
 - ./configure
 - make
 - make install
 - chown nagios.nagios /usr/local/nagios/
 - chown -R nagios.nagios /usr/local/nagios/libexec/
 - 2 nagios 安装nrpe的时候步骤(监控与被监控都要安装)
 - tar -zxvf nrpe-2.8.1.tar.gz
 - cd nrpe-2.8.1
 - ./configure
 - make all
 - make install-plugin
 - make install-daemon
 - make install-daemon-config
 - 3 vim /usr/local/nagios/etc/nrpe.cfg
 - #allowed_hosts=127.0.0.1
 - allowed_hosts=127.0.0.1,192.168.1.130(192.168.1.130监控端的地址)
 - 改/etc/hosts.allow增加监控机ip
 - echo 'nrpe:192.168.1.130' >> /etc/hosts.allow
 - 4启动服务
 - /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - 测试nrpe服务是否正常
 - /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1(用127.0.0.1测试 不要用localhost测试)
 - NRPE v2.8.1
 - 5在监控端(192.168.1.130)测试 看到如下结果说明成功
 - /etc/init.d/iptables stop(或者添加允许从被监控端收集信息)
 - /usr/local/nagios/libexec/check_nrpe -H 192.168.1.129
 - NRPE v2.8.1
 - 然后在监控端
 - 1 vim /usr/local/nagios/etc/objects/129.cfg 内容如下
 - define host{
 - use linux-server
 - host_name 129
 - alias 129
 - address 192.168.1.129
 - }
 - define service{
 - use generic-service
 - host_name 129
 - service_description load
 - check_command check_nrpe!check_load
 - #使用自定参数
 - #check_command check_nrpe!check_load!6.0,5.0,4.0!15.0,8.0,6.0
 - }
 - vim /usr/local/nagios/etc/nagios.cfg 添加如下内容
 - # Definitions for monitoring 192.168.1.129
 - cfg_file=/usr/local/nagios/etc/objects/129.cfg
 - vim /usr/local/nagios/etc/objects/commands.cfg
 - # 'check_nrpe ' command definition
 - define command{
 - command_name check_nrpe
 - command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
 - }
 - 监控机nagios重启
 - service nagios reload
 - 输入http://192.168.1.130/nagios 就可看到129已经添加成功
 - nagios监控swap
 - 在被监控机的/usr/local/nagios/etc/nrpe.cfg
 - vim /usr/local/nagios/etc/nrpe.cfg添加
 - command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%
 - nrpe服务重启
 - [root@localhost libexec]# ps -ef | grep nrpe
 - nagios 2332 1 0 14:24 ? 00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - root 2373 28887 0 14:25 pts/0 00:00:00 grep nrpe
 - kill -9 2332
 - /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - 监控端
 - /usr/local/nagios/etc/objects/commands.cfg添加
 - # check_swap command definition
 - define command{
 - command_name check_swap
 - command_line $USER1$/check_swap -w $ARG1$ -c $ARG2$
 - }
 - 在下面的文件中
 - vim /usr/local/nagios/etc/objects/129.cfg添加
 - define service{
 - use generic-service
 - host_name 129
 - service_description swap
 - check_command check_nrpe!check_swap
 - }
 - 重启nagios服务和http服务
 - service nagios restart
 - service httpd restart
 - nagios监控磁盘
 - 在被监控机的/usr/local/nagios/etc/nrpe.cfg
 - vim /usr/local/nagios/etc/nrpe.cfg添加
 - command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p /
 - nrpe服务重启
 - [root@localhost libexec]# ps -ef | grep nrpe
 - nagios 2332 1 0 14:24 ? 00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - root 2373 28887 0 14:25 pts/0 00:00:00 grep nrpe
 - kill -9 2332
 - /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - 监控端
 - /usr/local/nagios/etc/objects/commands.cfg添加
 - define command{
 - command_name check_disk
 - command_line $USER1$/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
 - }
 - 在下面的文件中
 - vim /usr/local/nagios/etc/objects/129.cfg添加
 - define service{
 - use generic-service
 - host_name 129
 - service_description disk
 - check_command check_nrpe!check_disk
 - }
 - 重启nagios服务和http服务
 - service nagios restart
 - service httpd restart
 - nagios监控内存
 - 监控内存脚本如下
 - ######################################
 - #!/bin/bash
 - # check memory script
 - TOTAL=`free -m | head -2 |tail -1 |gawk '{print $2}'`
 - USED=`free -m | head -2 |tail -1 |gawk '{print $3}'`
 - FREE=`free -m | head -2 |tail -1 |gawk '{print $4}'`
 - # to calculate free percent
 - # use the expression free * 100 / total
 - FREETMP=`expr $FREE \* 100`
 - PERCENT=`expr $FREETMP / $TOTAL`
 - echo "$TOTAL MB Total Memory"
 - echo "$USED MB Used Memory"
 - echo "$FREE MB ($PERCENT%) Free Memory"
 - exit 0
 - ######################################
 - 在被监控机的/usr/local/nagios/etc/nrpe.cfg
 - vim /usr/local/nagios/etc/nrpe.cfg添加
 - command[check_mem]=/usr/local/nagios/libexec/check_mem -w 150 -c 200
 - 把监控脚本check_mnem放到/usr/local/nagios/libexec/ 并赋予执行权限
 - chmod +x /usr/local/nagios/libexec/check_mem
 - chown nagios.nagios /usr/local/nagios/libexec/check_mem
 - nrpe服务重启
 - [root@localhost libexec]# ps -ef | grep nrpe
 - nagios 2332 1 0 14:24 ? 00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - root 2373 28887 0 14:25 pts/0 00:00:00 grep nrpe
 - kill -9 2332
 - /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
 - 监控端
 - /usr/local/nagios/etc/objects/commands.cfg添加
 - define command{
 - command_name check_mem
 - command_line $USER1$/check_mem -w $ARG1$ -c $ARG2$
 - }
 - 在下面的文件中
 - vim /usr/local/nagios/etc/objects/129.cfg添加
 - define service{
 - use generic-service
 - host_name 129
 - service_description memory
 - check_command check_nrpe!check_mem
 - }
 - 重启nagios服务和http服务
 - service nagios restart
 - service httpd restart
 - nagios监控http存活状态
 - 被监控机不需要任何操作(因为check_http不需要通过nrpe来监控)
 - 监控端
 - /usr/local/nagios/etc/objects/commands.cfg已经存在check_http命令 故也不需要操作
 - 在下面的文件中
 - vim /usr/local/nagios/etc/objects/129.cfg添加
 - define service{
 - use generic-service
 - host_name 129
 - service_description http
 - check_command check_http(这一行要注意 不是check_nrpe!check_http这种形式)
 - }
 - 重启nagios服务和http服务
 - service nagios restart
 - service httpd restart
 - 错误解决方法 因为http是采用yum安装的 网站文件路径默认是/var/www/html
 - 执行下面命令检测时
 - /usr/local/nagios/libexec/check_http -I 192.168.1.129
 - 报错如下
 - HTTP WARNING: HTTP/1.1 403 Forbidden
 - 原因这是因为/var/www/html 下面没有文件所致
 - cd /var/www/html
 - echo 123 >index.html
 - 然后过一会 nagios检测就ok了
 - nagios监控mysql存活状态
 - 被监控机登录数据库授权
 - mysql> grant all privileges on *.* to xxxxx@192.168.1.130 identified by '123456';
 - Query OK, 0 rows affected (0.09 sec)
 - mysql> flush privileges;
 - Query OK, 0 rows affected (0.08 sec)
 - 监控端
 - /usr/local/nagios/etc/objects/commands.cfg添加如下内容
 - # check_mysql command definition
 - define command{
 - command_name check_mysql
 - command_line $USER1$/check_mysql -H $HOSTADDRESS$ -P $ARG1$ -
 - u $ARG2$ -p $ARG3$ (liuyu那个pdf有问题)
 - }
 - 在下面的文件中
 - vim /usr/local/nagios/etc/objects/129.cfg添加
 - define service{
 - use generic-service
 - host_name 129
 - service_description mysql
 - check_command check_mysql!192.168.1.129!3306!xxxx!123456(这一行liuyu文档上是对的 这一行要注意 不是check_nrpe!check_http这种形式)
 - notifications_enabled 0
 - }
 - 重启nagios服务和http服务
 - service nagios restart
 - service httpd restart
 - nagios监控tomcat存活状态
 - 被监控机不需要任何操作(因为check_tcp!8080不需要通过nrpe来监控)
 - 监控端
 - /usr/local/nagios/etc/objects/commands.cfg已经存在check_tcp命令 故也不需要操作
 - 在下面的文件中
 - vim /usr/local/nagios/etc/objects/hong221.cfg添加
 - define service{
 - use generic-service
 - host_name hong221
 - service_description tomcat
 - check_command check_tcp!8080!xxxxx
 - }
 - 收到检测 执行下面命令
 - [root@nagios objects]# /usr/local/nagios/libexec/check_tcp -H xxxxx -p 8080
 - TCP OK - 0.141 second response time on port 8080|time=0.141140s;;;0.000000;10.000000
 - 重启nagios服务和http服务
 - service nagios restart
 - service httpd restart
 - 然后在监控端就可以看到监控页面了
 - nagios配置139邮箱报警
 - 关于mail发送邮件139邮箱收不到的解决办法
 - tail -f /var/log/maillog 日志报错如下
 - Feb 21 17:20:49 localhost postfix/qmgr[2072]: A296612227F: from=<root@localhost.localdomain>, size=700, nrcpt=1 (queue active)
 - Feb 21 17:20:49 localhost sendmail[2275]: q1L9KmDa002275: to=xxxxx@139.com, ctladdr=root (0/0), delay=00:00:01, xdelay=00:00:0
 - 0, mailer=relay, pri=30221, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (Ok: queued as A296612227F)
 - Feb 21 17:20:49 localhost postfix/smtpd[2276]: disconnect from localhost.localdomain[127.0.0.1]
 - Feb 21 17:20:50 localhost postfix/smtp[2280]: A296612227F: to=<xxxxx@139.com>, relay=mx1.mail.139.com[221.176.9.178]:25, delay
 - =0.53, delays=0.05/0.01/0.24/0.23, dsn=5.0.0, status=bounced (host mx1.mail.139.com[221.176.9.178] said: 550 985a4f43618db72-3c5de Mail rejected (in reply to end of DATA command))
 - Feb 21 17:20:50 localhost postfix/cleanup[2279]: 43FB812227E: message-id=<20120221092050.43FB812227E@localhost.localdomain>
 - Feb 21 17:20:50 localhost postfix/qmgr[2072]: 43FB812227E: from=<>, size=2697, nrcpt=1 (queue active)
 - Feb 21 17:20:50 localhost postfix/bounce[2281]: A296612227F: sender non-delivery notification: 43FB812227E
 - Feb 21 17:20:50 localhost postfix/qmgr[2072]: A296612227F: removed
 - 经指点是由于hostname(localhost.localdomain)的问题 可能会被139邮箱当做垃圾邮件
 - [root@nagios objects]# cat /etc/sysconfig/network
 - NETWORKING=yes
 - #HOSTNAME=localhost.localdomain
 - HOSTNAME=nagios.localdomain
 - [root@nagios objects]# cat /etc/hosts
 - 192.168.1.130 nagios.localdomain nagios # Added by NetworkManager
 - 127.0.0.1 localhost.localdomain localhost
 - ::1 nagios.localdomain nagios localhost6.localdomain6 localhost6
 - 故随便改了一个名字 然后重启服务器发现可以使用了 139邮箱也能收到邮件了
 - 关于服务报警nagios方面的配置
 - 监控机上
 - vim /usr/local/nagios/etc/objects/contacts.cfg
 - define contact{
 - contact_name nagiosadmin ; Short name of user
 - use generic-contact ; Inherit default values from generic-contact template (defined abov
 - e)
 - alias Nagios Admin ; Full name of user
 - 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-service-by-email
 - host_notification_commands notify-host-by-email
 - email xxxxx@139.com(写上你要发送到的邮箱里面 139邮箱运维必备) ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
 - }
 - define contactgroup{
 - contactgroup_name admins
 - alias Nagios Administrators
 - members nagiosadmin
 - }
 - 然后重启nagios服务即可
 - service nagios restart
 - 注意在主机配置文件中 有下面语句的服务出了问题才会报警
 - notifications_enabled 1 (1是报警 0为不报警)
 - 注意申请139邮箱的时候短信要选长格式的
 - 邮件到达通知 要改成24小时的
 - vim templates.cfg
 - define service{
 - name generic-service ; The 'name' of this service template
 - active_checks_enabled 1 ; Active service checks are enabled
 - passive_checks_enabled 1 ; Passive service checks are enabled/accepted
 - parallelize_check 1 ; Active service checks should be parallelized (disabling this can l
 - ead to major performance problems)
 - obsess_over_service 1 ; We should obsess over this service (if necessary)
 - check_freshness 0 ; Default is to NOT check service 'freshness'
 - notifications_enabled 1 ; Service notifications are enabled
 - event_handler_enabled 1 ; Service event handler is enabled
 - flap_detection_enabled 1 ; Flap detection is enabled
 - failure_prediction_enabled 1 ; Failure prediction is enabled
 - process_perf_data 1 ; Process performance data
 - retain_status_information 1 ; Retain status information across program restarts
 - retain_nonstatus_information 1 ; Retain non-status information across program restarts
 - is_volatile 0 ; The service is not volatile
 - check_period 24x7 ; The service can be checked at any time of the day
 - max_check_attempts 3 ; Re-check the service up to 3 times in order to determine its final
 - (hard) state
 - normal_check_interval 10 ; Check the service every 10 minutes under normal conditions
 - retry_check_interval 2 ; Re-check the service every two minutes until a hard state can be d
 - etermined
 - contact_groups admins ; Notifications get sent out to everyone in the 'admins' group
 - notification_options w,u,c,r ; Send notifications about warning, unknown, critical, and recovery
 - events
 - notification_interval 10 (这个就是间隔多少时间发一次报警信息) ; Re-notify about service problems every hour
 - notification_period 24x7 ; Notifications can be sent out at any time
 - register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEM
 - PLATE!
 - }
 - nagios相关错误解决方法
 - 错误解决方法
 - 一 当新增加一台监控主机(举例为129的load)监控项
 - 点击Scheduling Queue--129load时 Status Information :这一项提示为CHECK_NRPE: Socket timeout after 10 seconds
 - 检查
 - 1 首先在监控主机上 执行
 - /usr/local/nagios/libexec/check_nrpe -H 192.168.1.129
 - 看能不能得到NRPE的版本号
 - 然后查看iptables是否有相关限制
 - 2 查看文件权限
 - cd /usr/local/nagios/etc/objects
 - [root@localhost objects]# ll
 - total 52
 - -rw-r--r-- 1 root root 314 Feb 16 15:58 129.cfg
 - -rwxrwxrwx 1 nagios nagios 7856 Feb 16 16:06 commands.cfg
 - -rwxrwxrwx 1 nagios nagios 2166 Feb 16 13:58 contacts.cfg
 - -rwxrwxrwx 1 nagios nagios 5403 Feb 16 13:58 localhost.cfg
 - -rwxrwxrwx 1 nagios nagios 3124 Feb 16 13:58 printer.cfg
 - -rwxrwxrwx 1 nagios nagios 3293 Feb 16 13:58 switch.cfg
 - -rwxrwxrwx 1 nagios nagios 10812 Feb 16 13:58 templates.cfg
 - -rwxrwxrwx 1 nagios nagios 3209 Feb 16 13:58 timeperiods.cfg
 - -rwxrwxrwx 1 nagios nagios 4007 Feb 16 13:58 windows.cfg
 - 看看新增加的这个监控主机文件权限是不是nagios用户可读可写 不可以的话参照其他文件修改如下
 - [root@localhost objects]# ll
 - total 52
 - -rwxrwxrwx 1 nagios nagios 314 Feb 16 15:58 129.cfg
 - -rwxrwxrwx 1 nagios nagios 7856 Feb 16 16:06 commands.cfg
 - -rwxrwxrwx 1 nagios nagios 2166 Feb 16 13:58 contacts.cfg
 - -rwxrwxrwx 1 nagios nagios 5403 Feb 16 13:58 localhost.cfg
 - -rwxrwxrwx 1 nagios nagios 3124 Feb 16 13:58 printer.cfg
 - -rwxrwxrwx 1 nagios nagios 3293 Feb 16 13:58 switch.cfg
 - -rwxrwxrwx 1 nagios nagios 10812 Feb 16 13:58 templates.cfg
 - -rwxrwxrwx 1 nagios nagios 3209 Feb 16 13:58 timeperiods.cfg
 - -rwxrwxrwx 1 nagios nagios 4007 Feb 16 13:58 windows.cfg
 
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