实验环境：CentOS7
前提：已经安装好tomcat，未安装请查看http://www.cnblogs.com/wzhuo/p/7111135.html；
目的：基于主机名访问两个应用；
[root@tomcat localhost]#cd /etc/tomcat/
[root@tomcat localhost]#vim server.xml
#定义连接器的地址和端口、连接超时时长、最大并发数、是否反解ip成主机名
<Connector port="8081" protocol="HTTP/1.1"
connectionTimeout="20000" address="172.16.252.142" maxThreads="200" enableLookups="false"
redirectPort="8443" />
#定义host虚拟主机：文件路径，是否直接解压wars文件，是否支持自动重载
<Host name="linux1.com" appBase="webapps"
unpackWARs="true" autoDeploy="true">
className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" /> </Host>
<Host name="linux2.com" appBase="/data/apps"
unpackWARs="true" autoDeploy="true"> <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="linux2_access_log." suffix=".log"
pattern="%h %l %u %t "%r" %s %b" /> </Host>
#linux1.com的文件路径
[root@tomcat localhost]#cd /usr/share/tomcat/webapps/
[root@webapps localhost]#ls
examples host-manager manager ROOT sample shopxx shopxx-3.0Beta #linux2的文件路径：
[root@webapps localhost]#cd /data/apps/
[root@apps localhost]#ls
test
[root@apps localhost]#ls test/
classes index.jsp lib META-INF WEB-INF
[root@apps localhost]#cat test/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><font color="red">TomcatA.magedu.com</font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("magedu.com","magedu.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
#测试：
#tomcat和Nginx部署在同一主机，Nginx只做反代：
[root@~ localhost]#yum -y install nginx-1.10.2-1.el7.ngx.x86_64.rpm
[root@~ localhost]#vim /etc/nginx/conf.d/default.conf
server {
listen 80;
server_name localhost; #charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main; location / {
#如果此处写的是主机名，则务必在/etc/hosts文件中进行配置
proxy_pass http://172.16.254.47:8080;
root /usr/share/nginx/html;
index index.html index.htm;
} [root@~ localhost]#nginx -t
[root@~ localhost]#systemctl start nginx
#tomcat只处理动态页面：
[root@~ localhost]#vim /etc/nginx/conf.d/default.conf
server {
listen 80;
server_name localhost; location / {
#页面资源的路径
root /usr/share/tomcat/webapps/ROOT;
#默认主页；不用在浏览器键入index.jsp
index index.jsp index.html index.htm;
}
#将动态资源反代
location ~* \.(jsp|do)$ {
proxy_pass http://172.16.254.47:8080;
index index.jsp index.html;
}
[root@~ localhost]#nginx -t
[root@~ localhost]#nginx -s reload
#httpd做反代：
#httpd只做反代
#使用的是proxy_http_module模块
[root@conf.d localhost]#cd /etc/httpd/conf.d/
[root@conf.d localhost]#vim tomcat-http.conf
<VirtualHost *:80>
ServerName 172.16.254.47
#关闭正向代理
ProxyRequests Off
#代理服务器地址经由头部处理
ProxyVia On
#启用反向代理
ProxyPreserveHost On
<Proxy *>
Require all granted
</Proxy>
ProxyPass / http://172.16.254.47:8080/
ProxyPassReverse / http://172.16.254.47:8080/
<Location />
Require all granted
</Location>
</VirtualHost> [root@conf.d localhost]#httpd -t
[root@conf.d localhost]#systemctl start httpd.setvice
#用proxy_ajp_module模块代理时，只需将http换成ajp,8080改成8009即可
#测试
