1.安装nginx  

1. 执行安装指令　  apt-get install nginx
2. 查看版本     　　 nginx -v
3. 启动nginx    　　service nginx start
4. 访问页面，输入服务器的ip，出现欢迎界面

2.安装三个tomcat，注意修改/conf/server.xml中的三处端口号

<Server port="9005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />

<Connector port="9080" protocol="HTTP/1.1"
         connectionTimeout="20000"
         redirectPort="8443" />

<Connector port="9009" protocol="AJP/1.3" redirectPort="8443" />

3.在tomcat/webapp/ROOT中创建test.jsp文件，并编辑

<%@ page contentType="text/html;charset=UTF-8" %>
<%
out.print("欢迎访问 tomcat1");
%> 

4.修改nginx关于负载均衡的配置

1. vi /etc/nginx/nginx.conf 在include /etc/nginx/sites-enabled/*;的下面插入

   upstream tomcat_server  {
                   server 127.0.0.1:7080 weight=1;
                   server 127.0.0.1:8080 weight=1;
                   server 127.0.0.1:9080 weight=1;
           }
   
           server {
                   listen       80 default_server;
                   server_name  localhost;
   
                   location / {
                           proxy_pass http://tomcat_server/;
                           proxy_redirect default;
                           proxy_set_header Host $http_host;
                           proxy_set_header X-Forward-For $remote_addr;
                   }
   
                   error_page   500 502 503 504  /50x.html;
                   location = /50x.html {
                           root   html;
                   }
           }

    

2. 重启service nginx restart
3. 出现报错，把/etc/nginx/sites-enabled/default中的内容都注释掉，再重启
4. 访问http://IP/test.jsp