原贴发表在我的个人博客haha.tk | Ha?Have a Talk!上，转载请注明出处，谢谢。

因为禾斗石开需要，安装了中标麒麟高级服务器操作系统（虚拟化版）V6，然后该系统上部署了几个JAVA WEB项目，现在需要安装nginx，但是yum无法使用，出现以下异常信息：

Loaded plugins: refresh-packagekit, security
http://****: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

修改yum源改为163

cd  /etc/yum.repos.d/
# 备份原有的源
mv ns6-gen-x86_64.repo ns6-gen-x86_64.repo.old
# 下载网易163的源
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
mv CentOS6-Base-163.repo CentOS-Base.repo  
yum clean all
yum makecache

但在 yum makecache报错：

http://mirrors.163.com/centos/6/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
尝试其他镜像。错误：Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

这是因为无法访问http://mirrors.163.com/centos/6/os/x86_64/repodata/repomd.xml，repomd.xml 在http://mirrors.163.com/centos/6-6.5下已经不存在，需要更改CentOS-Base.repo此文件中的$releasever参数，对于CentOS来说，$releasever来源于 rpm -qi centos-release 的version数值。

# 查询中标麒麟系统的版本
cat /proc/version
Linux version 2.6.32-358.el6.x86_64 (mockbuild@ns60x64.cs2c.com.cn) (gcc version 4.4.7 20120313 (NeoKylin 4.4.7-3) (GCC) ) #1 SMP Fri Jul 12 10:25:19 CST 2013

对于中标麒麟高级服务器操作系统（虚拟化版）V6，经过测试，$releasever直接取 ** 6 ** 即可。

vim  CentOS-Base.repo
#vim命令模式下将所有的$releasever替换为6
:1,s/$releasever/6/g
# 再执行后续的指令
yum clean all
yum makecache

添加nginx的源

根据NGINX官方文档的安装方法：

To add NGINX yum repository, create a file named and paste one of the configurations below:

cd /etc/yum.repos.d/
# 新建nginx.repo文件
vim nginx.repo
# 填写以下内容
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/rhel/$releasever/$basearch/
gpgcheck=0
enabled=1

注意：$releasever和$basearch需要根据系统来确定，中标麒麟高级服务器操作系统（虚拟化版）V6最后确定为http://nginx.org/packages/rhel/6/x86_64/

安装pcre

尝试安装yum install nginx, 安装nginx时报错，因为nginx的rewrite需要pcre库。

./configure: error: the HTTP rewrite module requires the PCRE library.

安装pcre-devel解决问题

yum -y install pcre-devel

重新安装nginx依然出现错误提示：

./configure: error: the HTTP cache module requires md5 functions
from OpenSSL library.   You can either disable the module by using
–without-http-cache option, or install the OpenSSL library into the system,
or build the OpenSSL library statically from the source with nginx by using
–with-http_ssl_module –with-openssl=<path> options.

安装openssl相关软件：

yum -y install openssl openssl-devel

安装pcre：

# 下载相应版本的pcre
pcre-8.39.tar.bz2
# 解包解压缩
tar xjpf pcre-8.39.tar.bz2
# 切换到pcre的目录
cd pcre-7.8
# 配置
./configure --prefix=/usr/local/pcre-8.39 --libdir=/usr/local/lib/pcre --includedir=/usr/local/include/pcre

configure有许多参数可配，具体参见./configure –help及手册

# 编译及安装
make
make install

安装nginx

最后尝试安装yum install nginx，完成。

参考

解决centos 6.6 更换yum 163源报错

CentOS镜像使用帮助

Install

PCRE-nginx pcre library not found