更换CentOS7的yum源为阿里云

1、备份

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2、下载新的CentOS-Base.repo 到/etc/yum.repos.d/

CentOS 5

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

CentOS 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、之后运行 yum clean all, yum makecache 生成缓存

http://mirrors.aliyun.com/help/centos

参考文章：http://www.centoscn.com/CentOS/config/2015/0525/5524.html

1、备份(如有配置其他epel源)

mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup

mv /etc/yum.repos.d/epel-testing.repo /etc/yum.repos.d/epel-testing.repo.backup

2、下载新repo 到/etc/yum.repos.d/

epel(RHEL 7)

 
	wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
            

epel(RHEL 6)

 
	wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
            

epel(RHEL 5)

	wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-5.repo

ansible 分发其他机器

ansible hadoop -m shell -a "mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak"
 
ansible hadoop -m shell -a "mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.bak"

ansible hadoop -m copy -a "src=/etc/yum.repos.d/Centos-7.repo dest=/etc/yum.repos.d/Centos-7.repo"

ansible hadoop -m copy -a "src=/etc/yum.repos.d/epel-7.repo dest=/etc/yum.repos.d/epel-7.repo"


ansible hadoop -m shell  -a "yum clean all && yum makecache"