LVS实践系列(2)-在RealServer的Ubuntu12.04环境下源码安装apache2

这篇短文主要描述在ubuntu环境下源码安装apache2的遇到的问题以及解决方式。
思路：
1.ubuntu12.04默认安装下没有安装C++，需要先安装C++编译所依赖的相关组件。
2.安装apache多个依赖库，包括：apr, apr-util,pcre,zlib-devel.
3.安装apache2

1.源码安装apr
(1)下载
sudo wget http://archive.apache.org/dist/apr/apr-1.4.5.tar.gz
(2)解压
tar -zxvf apr-1.4.5.tar.gz
或者 gzip -d apr-1.4.5.tar.gz ,tar xvf apr-1.4.5.tar
(3)进入apr-1.4.5,指定apr安装路径
cd apr-1.4.5
./configure -prefix=/usr/local/apr
(4)编译
make
(5)安装
make install

2.源码安装apr-util
(1)下载
sudo wget http://archive.apache.org/dist/apr/apr-util-1.3.12.tar.gz
(2)解压
tar -zxvf apr-util-1.3.12.tar.gz
(3)进入apr-util-1.3.12,指定apr-util安装路径时一并带上 apr安装路径
cd apr-util-1.3.12
./configure -prefix=/usr/local/apr-util --with-apr=/usr/local/apr
(4)编译
make
(5)安装
make install

3.源码安装pcre
(1)下载
sudo wget http://jaist.dl.sourceforge.net/project/pcre/pcre/8.10/pcre-8.10.zip
(2)解压
sudo unzip pcre-8.10.zip -d ./
(3)进入pcre-8.10,指定pcre安装路径
cd pcre-8.10
./configure -prefix=/usr/local/pcre
(4)编译
make
(5)安装
make install

4.安装zlib-devel
sudo apt-get install zlib1g-dev
若不安装该包，则在安装Apache2时会出现checking whether to enable mod_deflate... configure: error: 
mod_deflate has been requested but can not be built due to prerequisite failures错误
此包不建议下载安装，因多次尝试未成功。

(1)手工下载 httpd-2.4.10.tar.gz  地址：http://httpd.apache.org/download.cgi#apache24
(2)解压
tar -zxvf httpd-2.4.10.tar.gz
(3)进入httpd-2.4.10,指定Apache安装路径
cd httpd-2.4.10
./configure -prefix=/usr/local/apache2 --enable-deflate --enable-expires --enable-headers --enable-modules=most 
--enable-so --with-mpm=worker --enable-rewrite --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util 
--with-pcre=/usr/local/pcre

此步可能以下几种错误：
a.出现checking whether to enable mod_deflate... configure: error: mod_deflate has been requested but 
can not be built due to prerequisite failures
解决办法：sudo apt-get install zlib1g-dev

b. 出现/bin/bash: bison: command not found
解决办法：sudo apt-get install bison

c.出现/bin/bash: flex: command not found
解决办法：sudo apt-get install flex

(4)检查apache2是否有安装错误
echo $?
若返回0，则表示安装正确

(5)编译
make
(6)安装
make install
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##Apache2启动、停止、重启

前提apahce安装目录为/usr/local/apache2,若不是，请相应修改

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(1)apahce启动
/usr/local/apache2/bin/apachectl start

(2)apache停止
/usr/local/apache2/bin/apachectl stop 

(3)apache重新启动
/usr/local/apache2/bin/apachectl restart

(4)在重启 Apache 服务器时不中断当前连接
/usr/local/sbin/apachectl graceful 

(5)若apache安装成为linux的服务则可以： 
service httpd start 启动 
service httpd restart 重新启动 
service httpd stop 停止服务