一般apache用來做web服務比較多，很少聽說可以做反向代理，最近聽到，抱著嘗試的心態就試了試，配置不是很複雜

環境：

系統Centos7  

[[email protected] extra]# uname -a
Linux localhost.localdomain 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

0.三臺機器都關閉防火牆和selinux

systemctl  stop firewalld
setenforce 0

1.先把WebA和WebB裝上web服務

WebA和WebB：

yum install httpd

WebA：

echo "i am A" > /var/www/html/index.html

WebB：

echo "i am B" > /var/www/html/index.html

WebA和WebB：

systemctl  start httpd

瀏覽器測試一下是否成功

WebA成功

2.在反向代理伺服器192.168.253.137  編譯安裝apache2.4版本

cd /usr/local/src
mkdir apache
cd apache/
wget http://mirrors.hust.edu.cn/apache//httpd/httpd-2.4.33.tar.gz   ##這個http2.4的下載地址  根據情況而定
wget http://mirrors.hust.edu.cn/apache//apr/apr-1.6.3.tar.gz
wget http://mirrors.hust.edu.cn/apache//apr/apr-util-1.6.1.tar.gz
tar -zxf apr-1.6.3.tar.gz 
tar -zxf apr-util-1.6.1.tar.gz 
tar -zxf httpd-2.4.33.tar.gz 
mv apr-1.6.3 httpd-2.4.33/srclib/apr
mv apr-util-1.6.1 httpd-2.4.33/srclib/apr-util
cd httpd-2.4.33
 yum install gcc gcc-devel pcre pcre-devel expat expat-devel openssl openssl-devel zlib-devel   -y
./configure  --prefix=/usr/local/httpd --enable-so --enable-modules="all" --with-included-apr
make && make install 
PATH=PATH="/usr/local/httpd/bin/:$PATH"
 

然後測試一下

檢視一下目錄結構

[[email protected] httpd]# tree -L 1
.
├── bin              #apachectl相關命令
├── build             
├── cgi-bin
├── conf             #apache的配置檔案目錄
├── error
├── htdocs
├── icons
├── include
├── lib
├── logs           #apache預設存放日誌的目錄
├── man
├── manual
└── modules

主要的幾個配置檔案

conf
├── extra
│   ├── httpd-autoindex.conf
│   ├── httpd-dav.conf
│   ├── httpd-default.conf
│   ├── httpd-info.conf
│   ├── httpd-languages.conf
│   ├── httpd-manual.conf
│   ├── httpd-mpm.conf
│   ├── httpd-multilang-errordoc.conf
│   ├── httpd-ssl.conf
│   ├── httpd-userdir.conf
│   ├── httpd-vhosts.conf
│   └── proxy-html.conf
├── httpd.conf
├── magic
├── mime.types
└── original
 

3.編寫proxy配置檔案,吧配置檔案寫在/usr/local/httpd/conf/extra/httpd-proxy.conf

[[email protected] extra]# cat httpd-proxy.conf 
#proxy  
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 lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so
LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so
LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so
LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
ProxyRequests Off
<Proxy "balancer://mycluster">    #後端web服務的成員組
    BalancerMember "http://192.168.253.142:80"
    BalancerMember "http://192.168.253.132:80"
</Proxy>
ProxyPass        "/proxy_demo" "balancer://mycluster"
ProxyPassReverse "/proxy_demo" "balancer://mycluster"
<Location /admin>                 #配置反向代理的web管理介面
    SetHandler balancer-manager
    Order Deny,Allow
    Allow from all
</Location>

修改主配置檔案

echo "Include conf/extra/httpd-proxy.conf" >> /usr/local/httpd/conf/httpd.conf 
echo "ServerName 127.0.0.1:80" >> /usr/local/httpd/conf/httpd.conf

啟動

apachectl restart 

檢視埠是否監聽

表示成功 

4.測試反向代理功能

192.168.253.137是反向代理伺服器，可以連線到WebA和WebB表示成功

5.測試反向代理的web管理介面

如果要把反向代理配置到虛擬主機配置檔案可以改為

#proxy demo
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 lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so
LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so
LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so
LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
ProxyRequests Off    #是否開啟apache正向代理功能，如果設定了ProxyPass必須將ProxyRequests設定為Off
<Proxy "balancer://mycluster">
    BalancerMember "http://192.168.253.142:80"
    BalancerMember "http://192.168.253.132:80"
</Proxy>

<VirtualHost 192.168.253.137:80>
    ServerAdmin [email protected]
    DocumentRoot "/opt"
    ErrorLog "logs/192.168.253.137_error_log"
    CustomLog "logs/192.168.253.137_access_log" common
    ProxyPass        "/" "balancer://mycluster"   
    ProxyPassReverse "/" "balancer://mycluster"
</VirtualHost>