公司添加项目，需要架设环境，当时考虑用的nginx转发tomcat，可是分公司那边不会用nignx，只有用apache 反向代理 tomcat 虚拟主机，由于是头一次用 apache 做反向，tomcat集群，特留下过程，方便他人

在网上找了好多文章，其中为经典的我都摘抄了
     Apache HTTP server 和 Tomcat server 整合，一般是希望对于用户只公布 Apache HTTP server 的网址，而 Tomcat 的网址则不公布，扮演一个幕后英雄的角色。访问Tomcat 的 HTTP 请求，通过 Apache 转发给 Tomcat，Tomcat 处理完后，将 HTTP 回应返回给 Apache，然后 Apache  HTTP 回应发回给用户端浏览器。
Apache HTTP server 和 Tomcat server 直接的 HTTP 数据传输，有很多种方法。
     
方法一，使用 mod_jk。很多网站上介绍到 Apache HTTP server 和 Tomcat server 整合的时候，都是在介绍  mod_jk.so 的使用，这是一种比较老的方法，并且需要额外下载mod_jk。Apache 和 Tomcat 的默认配置文件都需要改动。
方法二， URL rewrite，也就是对于指定格式的 URL，转发给某个 Tomcat 的网址。这里所说的指定格式，是指 Apache 所使用的正则表达式，通俗地将，是一种类似 * 的一种比较高级通配符。这种方法不需要下在额外的文件，只需要配置 Apache。
方法三，mod_proxy_ajp，仅在 Apache 2.1 及以后的版本中可用，Apache 自带的一个新功能模块。这时 Apache 使用 Apache JServ Protocol 与 Tomcat 通讯。不需要下在额外的文件，需要改动Apache 和 Tomcat 的默认配置文件都需要改动。
方法四，mod_proxy。其实 mod_proxy 既可以做类似于 Wingate 一样的公司局域网共享上网代理，也可以做反向代理(Reverse proxy)。这里使用的是反向代理功能，用户端浏览器不需要把代理服务器改成这里的 Apache 地址。mod_proxy 是 Apache 自带功能，并且配置比较简单。
 

yum install gcc -y

wget http://mirror.bjtu.edu.cn/apache//httpd/httpd-2.2.17.tar.gz

wget http://www.oracle.com/technetwork/indexes/downloads/index.html

wget http://labs.renren.com/apache-mirror/tomcat/tomcat-7/v7.0.8/bin/apache-tomcat-7.0.8.tar.gz

我是用一台服务器 做的 环境如下

Centos 5.5 64位 16核cpu  32G 内存

Apache + tomcat （开启四个端口）

 

#ar zxvf http-2.2.17.tar.gz
#d httpd-2.2.17
#/configure --prefix=/usr/local/apache --enable-modules=so --enable-mods-shared=all --enable-proxy --enable-proxy-connect --enable-proxy-ftp --enable-proxy-http --enable-proxy-ajp --enable-proxy-balancer --enable-rewrite
#make ; make install
#cp support/apachectl /etc/init.d/httpd
#chmod 755 /etc/init.d/httpd
#vim /etc/init.d/httpd
#chconfig –add httpd
#chkconfig –level 345 httpd on
cd ..
chmod +x jdk-x64.bin          #添加执行权限
./jdk-x64.bin             #安装jdk
mv jdk1.6.0_23/ /usr/java      
vim /etc/profile    # 添加java环境变量
#Java Environment
JAVA_HOME=/usr/java
JAVA_BIN=/usr/java/bin
PATH=$PATH:$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME JAVA_BIN PATH CLASSPATH
source /etc/profile  
#java –version
    java version "1.6.0_23"
    Java(TM) SE Runtime Environment (build 1.6.0_23-b05)
    Java HotSpot(TM) 64-Bit Server VM (build 19.0-b09, mixed mode)
 
#tar zxvf apache-tomcat-7.0.8.tar.gz
#mv apache-tomcat-7.0.8 /usr/local/tomcat73
#vim /etc/profile      # 添加tomcat 环境变量
TOMCAT_HOME=/usr/local/tomcat73
CATALINA_HOME=/usr/local/tomcat73
CATLINA_BASE=/usr/local/tomcat73
/usr/local/tomcat73/bin/catalina.sh start  #添加启动脚本
export TOMCAT_HOME  CATALINA_HOME  CATALINA_BASH TOMCAT_BIN
#source /etc/profile

 

 

LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule rewrite_module modules/mod_rewrite.so
   把apache 虚拟主机前边的# 去掉
           Include conf/extra/httpd-vhosts.conf
   添加 Include conf/extra/httpd-vhosts.conf  如下
<VirtualHost *80>
     ServerAdmin crazylinux@163.com
     ProxyRequests Off
     Proxypass / balancer://proxy/
     <Proxy balancer://proxy>
         Order Deny,Allow
         Allow from all
         BalancerMember http://127.0.0.1:8844         #tomcat  端口 （要用的端口，预设值的  可以随便设置）
         BalancerMember http://127.0.0.1:8855         #tomcat  端口
         BalancerMember http://127.0.0.1:8866          #tomcat  端口
         BalancerMember http://127.0.0.1:8877          #tomcat  端口
     </Proxy>
</VirtualHost>
保存修改  启动apache 服务
#/usr/local/apache/bin/apachectl -k start
  
修改 tomcat ，添加虚拟主机 按端口走 8844 8855 8866 8877 按照预设值的
#vim /usr/local/tomcat73/conf/server.xml 只修改红色字体
  <Service name="Catalina0">
<Connector port="8044" protocol="AJP/1.3" redirectPort="8443" />
    <Connector port="8844" />
    <Engine name="Catalina0" defaultHost="localhost" jvmRoute="jvm1">
      <Logger className="org.apache.catalina.logger.FileLogger" />
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
             resourceName="UserDatabase" />
      <Host name="localhost" appBase="webapps0" />
    </Engine>
  </Service>
  <Service name="Catalina1">
<Connector port="8055" protocol="AJP/1.3" redirectPort="8443" />
    <Connector port="8855" />
    <Engine name="Catalina1" defaultHost="localhost" jvmRoute="jvm2">
      <Logger className="org.apache.catalina.logger.FileLogger" />
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
             resourceName="UserDatabase" />
      <Host name="localhost" appBase="webapps1" />
    </Engine>
  </Service>
  <Service name="Catalina2">
<Connector port="8066" protocol="AJP/1.3" redirectPort="8443" />
    <Connector port="8866" />
    <Engine name="Catalina2" defaultHost="localhost" jvmRoute="jvm3">
      <Logger className="org.apache.catalina.logger.FileLogger" />
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
             resourceName="UserDatabase" />
      <Host name="localhost" appBase="webapps2" />
    </Engine>
  </Service>
  <Service name="Catalina3">
<Connector port="8077" protocol="AJP/1.3" redirectPort="8443" />
    <Connector port="8877" />
    <Engine name="Catalina3" defaultHost="localhost" jvmRoute="jvm4">
      <Logger className="org.apache.catalina.logger.FileLogger" />
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
             resourceName="UserDatabase" />
      <Host name="localhost" appBase="webapps3" />
    </Engine>
  </Service>
然后 创建 tomcat web 目录在/usr/local/tomcat73/   webapps0 webapps1 webapps2 webapps3 并在每个目录里面添加 index1.jsp 并添加 每个端口的对应号
启动tomcat
#/usr/local/tomcat73/bin/start.sh
#/usr/local/apache/bin/apachetl –k restart
  查看端口  netsant –ntlp
[root@localhost tomcat73]# netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address            State       PID/Program name  
tcp        0      0 0.0.0.0:964                 0.0.0.0:*                  LISTEN      2902/rpc.statd     
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                  LISTEN      2849/portmap       
tcp        0      0 127.0.0.1:631               0.0.0.0:*                  LISTEN      3155/cupsd         
tcp        0      0 127.0.0.1:25                0.0.0.0:*                  LISTEN      3178/sendmail: acce
tcp        0      0 127.0.0.1:6010              0.0.0.0:*                  LISTEN      11977/1            
tcp        0      0 :::8866                     :::*                       LISTEN      15836/java         
tcp        0      0 :::8066                     :::*                       LISTEN      15836/java         
tcp        0      0 ::ffff:127.0.0.1:8005       :::*                       LISTEN      15836/java         
tcp        0      0 :::8009                     :::*                       LISTEN      15836/java         
tcp        0      0 :::8844                     :::*                       LISTEN      15836/java         
tcp        0      0 :::8044                     :::*                       LISTEN      15836/java         
tcp        0      0 :::8877                     :::*                       LISTEN      15836/java         
tcp        0      0 :::8077                     :::*                       LISTEN      15836/java          
tcp        0      0 :::80                       :::*                       LISTEN      15987/httpd        
tcp        0      0 :::8080                     :::*                       LISTEN      15836/java         
tcp        0      0 :::22                       :::*                       LISTEN      25432/sshd         
tcp        0      0 :::8855                     :::*                       LISTEN      15836/java         
tcp        0      0 :::8055                     :::*                       LISTEN      15836/java         
tcp        0      0 ::1:6010                    :::*                       LISTEN      11977/1 
 
 
看到了 80  8844 8855 8866 8877  那tomcat 虚拟主机  和 apache都启动了 访问下试试吧
linux apache反向代理 tomcat _tomcat