......[Errno 14] curl#7 - "Failed connect to mirrors.aliyuncs.com:80; Connection refused"

• 解决办法

yum clean all
yum makecache
[root@master ~]# vi /etc/resolv.conf 
# Generated by NetworkManager
nameserver 8.8.8.8
#向resolv.conf文件中添加下面内容
nameserver 114.114.114.114