Httpd-2.4

1.mpm支持运行dos机制

2.支持event mpm

3.支持异步读写

4.支持每模块及每个目录分别使用各自的日志级别；

5.每请求配置；

6.增强版的表达式分析

7.支持毫秒级别的keeplive timeout

8.基于fqdn的虚拟主机不再需要namevirtualhost指令；

9.支持用户自定义变量

新模块：

1.mod_proxy_fcgi

2.Mod_ratelimt

3.Mod_remoteip

修改了一些配置机制；

不再支持使用order，deny，allow对ip进行访问控制

httpd依赖于apr，apr-util，apr-icon

apr：apache portable runtime  可移植运行库

安装过程：

1.先安装开发环境:

yum groupinstall "Development Tools" "Server Platform Development" -y
yum install -y pcre-devel zlib-devel

要安装1.4以上版本apr 以及apr-until

2.下载安装apr-1.5.2

[root@localhost ~]# wget http://mirrors.hust.edu.cn/apache//apr/apr-1.5.2.tar.gz
tar -zxvf apr-1.5.2.tar.gz
cd apr-1.5.2
./configure --prefix=/usr/local/apr
make
make install

3.下载安装apr-until-1.5.4

[root@localhost ~]# wget http://mirrors.cnnic.cn/apache//apr/apr-util-1.5.4.tar.gz
tar -zxvf apr-util-1.5.4.tar.gz
cd apr-util-1.5.4
./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
make
make install

4.下载http-2.4.17

wget http://mirrors.hust.edu.cn/apache//httpd/httpd-2.4.17.tar.gz
[root@localhost httpd-2.4.17]# tar -zxvf httpd-2.4.17.tar.gz

创建apache用户和组：groupadd -r apache
[root@localhost ~]# useradd -r -g apache apache

./configure --prefix=/usr/local/apache --sysconfdir=/etc/httpd --enable-so --enable-ssl --enable-cgi --enable-rewrite --with-zlib --with-pcre --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util/ --enable-modules=most --enable-mpms-shared=all --with-mpm=prefork

修改系统用户：

[root@localhost apache]# vim /etc/httpd/httpd.conf
#User daemon
#Group daemonUser apache
Group apache

编译安装网页存放目录：/usr/local/apache/htdocs

ln -sv /usr/local/apache/include/ /usr/include/httpd

启动服务：添加环境变量，找到apachectl 命令路径：

vim /etc/profile.d/httpd.sh
export PATH=/usr/local/apache/bin:$PATH
apachectl start

或者用hash -r命令清除搜索记录：
httpd -M 查看全部模块

查看系统进程：http已经启动完毕。

[root@localhost ~]# ps aux | grep httpd
root      41702  0.0  0.1  72108  1968 ?        Ss   01:15   0:00 /usr/local/apache/bin/httpd -k start
apache    41703  0.0  0.1  72108  1400 ?        S    01:15   0:00 /usr/local/apache/bin/httpd -k start
apache    41704  0.0  0.1  72108  1400 ?        S    01:15   0:00 /usr/local/apache/bin/httpd -k start
apache    41705  0.0  0.2  72108  2040 ?        S    01:15   0:00 /usr/local/apache/bin/httpd -k start
apache    41706  0.0  0.1  72108  1400 ?        S    01:15   0:00 /usr/local/apache/bin/httpd -k start
apache    41707  0.0  0.2  72108  2032 ?        S    01:15   0:00 /usr/local/apache/bin/httpd -k start
apache    41902  0.0  0.1  72108  1408 ?        S    02:03   0:00 /usr/local/apache/bin/httpd -k start
apache    41903  0.0  0.1  72108  1408 ?        S    02:03   0:00 /usr/local/apache/bin/httpd -k start
apache    41904  0.0  0.1  72108  1408 ?        S    02:03   0:00 /usr/local/apache/bin/httpd -k start
root      41919  0.0  0.0 103304   888 pts/0    S+   02:06   0:00 grep httpd
[root@localhost ~]#

# Path to the apachectl script, server binary, and short-form for messages.

apachectl=/usr/local/apache/bin/apachectl

httpd=${HTTPD-/usr/local/apache/bin/httpd}

prog=httpd

pidfile=${PIDFILE-/usr/local/apache/logs/httpd.pid}

lockfile=${LOCKFILE-/var/lock/subsys/httpd}

RETVAL=0

STOP_TIMEOUT=${STOP_TIMEOUT-10}

配置：

1：切换使用mpm：

打开配置文档找到以下模块位置：

LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
#LoadModule mpm_worker_module modules/mod_mpm_worker.so

NAME:prefork,event,worker

2:修改“main”server的DocumentRoot

打开：

[root@localhost ~]# vim /etc/httpd/httpd.conf

找到：

# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
DocumentRoot "/usr/local/apache/htdocs" 修改两个主页目录
<Directory "/usr/local/apache/htdocs">   同上，并且一致

3：基于ip的访问控制法则

允许所有主机访问：Require all granted

拒绝所有主机访问：Require all deny

控制特定ip访问：

require ip IPADDR：授权指定来源的主机访问

Require not ip IPADDR：拒绝指定来源地址的主机访问

ipADDR：

ip：192.168.1.1

network/mask 192.168.1.0/24

Network/Lenth

HostName:

FqDN

DOMAIN:

4:虚拟主机配置：

基于IP，port和FQDN

基于FQDN不再需要NameVirtualHost指令

（1）需要注释掉中心主机：

# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
#DocumentRoot "/usr/local/apache/htdocs"
#<Directory "/usr/local/apache/htdocs">

（2）找到配置文件里的以下参数：

# Virtual hosts
Include /etc/httpd/extra/httpd-vhosts.conf  这项开启

（3）进入到extra目录下：找到httpd-vhosts.conf

[root@localhost ~]# cd /etc/httpd/extra/
[root@localhost extra]# ls
httpd-autoindex.conf  httpd-default.conf  httpd-languages.conf  httpd-mpm.conf                 httpd-ssl.conf      httpd-vhosts.conf
httpd-dav.conf        httpd-info.conf     httpd-manual.conf     httpd-multilang-errordoc.conf  httpd-userdir.conf  proxy-html.conf
[root@localhost extra]#

打开httpd-vhosts.conf配置文件：

修改参数，以下实例参考：

<VirtualHost *:80>ServerAdmin webadmin@a.comDocumentRoot "/vhost/www.a.com/htdoc/"ServerName www.a.comServerAlias a.comErrorLog "logs/www.a.com-error_log"CustomLog "logs/www.a.com-access_log" combined<Directory "/vhost/www.a.com/htdoc/">Options NoneAllowOverride noneRequire all granted</Directory>
</VirtualHost>

修改启动脚本参数为以下内容：

apachectl=/usr/local/apache/bin/apachectl
httpd=${HTTPD-/usr/local/apache/bin/httpd}
prog=httpd
pidfile=${PIDFILE-/usr/local/apache/logs/httpd.pid}
lockfile=${LOCKFILE-/var/lock/subsys/httpd}
RETVAL=0
STOP_TIMEOUT=${STOP_TIMEOUT-10}