准备环境：三台主机：一台nginx：172.18.9.200、两台Tomcat：172.18.9.201；172.18.9.202. **一、**安装Nginx、Tomcat： [root@200 ~]#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo #更新镜像 [root@200 ~]#yum -y install epel-release [root@200 ~]#yum install nginx [root@201/202 src]#ll total 172028 -rw-r--r-- 1 root root 176154027 Nov 20 03:06 jdk-8u191-linux-x64.rpm [root@201/202 src]#yum -y install jdk-8u191-linux-x64.rpm [root@201/02 src]#yum install -y tomcat.noarch tomcat-admin-webapps.noarch tomcat-docs-webapp.noarch tomcat-webapps.noarch tomcat-javadoc.noarch **二、**配置Nginx： [root@200 ~]#vim /etc/nginx/conf.d/tomcat.conf server { listen 80; server_name www.ready.com; location / { proxy_pass http://172.18.9.201:8080; } } 三、查看Tomcat的默认配置： [root@201 /etc/tomcat]#ls Catalina catalina.properties context.xml logging.properties tomcat.conf web.xml catalina.policy conf.d log4j.properties server.xml tomcat-users.xml **四、**使用Tomcat默认配置测试Nginx+Tomcat是否连通： 启动Nginx、Tomcat： [root@200 ~]#systemctl start nginx [root@201 tomcat]#systemctl start tomcat **五、**访问www.ready.com: **六、**在Tomcat上部署测试应用： 1、以WAR包为例，创建一个动态网页： a、创建项目目录： [root@201 tomcat]#mkdir -pv /var/lib/tomcat/webapps/test/{WEB-INF,META-INF,classes,lib} mkdir: created directory ‘/var/lib/tomcat/webapps/test’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/WEB-INF’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/META-INF’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/classes’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/lib’ b、创建主页文件index.jsp(功能为查询session状态)： [root@201 tomcat]#vim /var/lib/tomcat/webapps/test/index.jsp <%@ page language="java" %> <html> <head><title>TomcatA</title></head> <body> <font color="red">Tomcat.ready.com</font> <table align="centre" border="1"> <tr> <td>Session ID</td> <% session.setAttribute("ready.com","ready.com"); %> <td><%= session.getId() %></td> </tr> <tr> <td>Created on</td> <td><%= session.getCreationTime() %></td> </tr> </table> </body> </html> c、访问http://www.ready.com/test/index.jsp **七、**Nginx做反向代理负载均衡后端Tomcat： 反向代理：反向代理也叫reverse proxy，指的是代理外网用户的请求到内部的指定web服务器，并将数据返回给用户的一种方式，这是用的比较多的一种方式。 1、在主机3上安装Tomcat，并修改index.jsp文件: [root@202 src]#mkdir -pv /var/lib/tomcat/webapps/test/{WEB-INF,META-INF,classes,lib} mkdir: created directory ‘/var/lib/tomcat/webapps/test’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/WEB-INF’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/META-INF’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/classes’ mkdir: created directory ‘/var/lib/tomcat/webapps/test/lib’ [root@202 src]#vim /var/lib/tomcat/webapps/test/index.jsp <%@ page language="java" %> <html> <head><title>TomcatA</title></head> <body> <font color="green">Jerrymouse.ready.com</font> #修改标题颜色和内容 <table align="centre" border="1"> <tr> <td>Session ID</td> <% session.setAttribute("ready.com","ready.com"); %> <td><%= session.getId() %></td> </tr> <tr> <td>Created on</td> <td><%= session.getCreationTime() %></td> </tr> </table> </body> </html> 2、在172.18.9.200上配置Nginx，在默认配置中的http模块中插入upstream： nginx通过proxy_pass_http 配置代理站点，upstream实现负载均衡。 [root@200 ~]#vim /etc/nginx/nginx.conf upstream tcsv { server 172.18.9.201:8080; server 172.18.9.202:8080; } [root@200 ~]#vim /etc/nginx/conf.d/tomcat.conf server { listen 80; server_name www.ready.com; location / { proxy_pass http://tcsv; } } 3、重启Nginx和Tomcat，再次访问www.ready.com: [root@200 ~]#systemctl restart nginx [root@201/202 tomcat]#systemctl restart tomcat 本实验结束！