方式一：通过CodeIT库升级

1、找出默认软件库上的Apache版本

查看已安装Apache版本

  1. [root@yun ~]# httpd -v
  2. Server version: Apache/2.4.6 (CentOS)
  3. Server built:   Jun 27 2018 13:48:59

为了查找Centos上软件库里的Apache版本，在命令行下输入以下指令：

[root@yun ~]# yum info httpd
Loaded plugins: changelog, fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * epel: ftp.jaist.ac.jp
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
 * webtatic: uk.repo.webtatic.com
Installed Packages
Name        : httpd
Arch        : x86_64
Version     : 2.4.6
Release     : 80.el7.centos.1
Size        : 9.4 M
Repo        : installed
From repo   : updates
Summary     : Apache HTTP Server
URL         : http://httpd.apache.org/
License     : ASL 2.0
Description : The Apache HTTP Server is a powerful, efficient, and extensible
            : web server.

Available Packages
Name        : httpd
Arch        : x86_64
Version     : 2.4.6
Release     : 93.el7.centos
Size        : 2.7 M
Repo        : base/7/x86_64
Summary     : Apache HTTP Server
URL         : http://httpd.apache.org/
License     : ASL 2.0
Description : The Apache HTTP Server is a powerful, efficient, and extensible
            : web server.

从上面的输出结果中看到，默认软件库中只有2.4.6版本的apache.

2、安装CodeIT库

CodeIT的人提供了一个很好的自定义库。这个库提供了最新版本的服务器软件(Apache & Nginx)。

在安装CodeIT库之前，需要开启 EPEL 。EPEL提供了CodeIT库需要的依赖。

[root@yun ~]# yum install -y epel-release

最后，我们来安装CodeIT库

[root@yun ~]# cd /etc/yum.repos.d && wget https://repo.codeit.guru/codeit.el`rpm -q --qf "%{VERSION}" $(rpm -q --whatprovides redhat-release)`.repo

接下来，我们再次确认Apache的包版本，你应该会看到类似下面的输出

[root@yun yum.repos.d]# yum info httpd
Loaded plugins: changelog, fastestmirror
CodeIT                                                   | 2.9 kB     00:00
CodeIT/x86_64/primary_db                                   |  57 kB   00:09
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * epel: ftp.jaist.ac.jp
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
 * webtatic: uk.repo.webtatic.com
Installed Packages
Name        : httpd
Arch        : x86_64
Version     : 2.4.6
Release     : 80.el7.centos.1
Size        : 9.4 M
Repo        : installed
From repo   : updates
Summary     : Apache HTTP Server
URL         : http://httpd.apache.org/
License     : ASL 2.0
Description : The Apache HTTP Server is a powerful, efficient, and extensible
            : web server.

Available Packages
Name        : httpd
Arch        : x86_64
Version     : 2.4.46
Release     : 1.codeit.el7
Size        : 1.4 M
Repo        : CodeIT/x86_64
Summary     : Apache HTTP Server
URL         : https://httpd.apache.org/
License     : ASL 2.0
Description : The Apache HTTP Server is a powerful, efficient, and extensible
            : web server.

3、升级Apache

现在直接使用 yum update升级即可：

[root@yun yum.repos.d]# yum update httpd

一旦Apache安装好，我们就可以启动apache

[root@yun yum.repos.d]# systemctl start httpd