centos8.3 yum 异常报错

Question

换了centos8.3 yum更新还是有问题
yum makecache
CentOS-8 - Base - mirrors.aliyun.com 0.0 B/s | 0 B 00:30
Errors during downloading metadata for repository 'base':

• Curl error (28): Timeout was reached for http://mirrors.aliyuncs.com/c... [Connection timed out after 30001 milliseconds]
• Curl error (35): SSL connect error for https://mirrors.aliyun.com/ce... [error:1408F10B:SSL routines:ssl3_get_record:wrong version number]
• Curl error (6): Couldn't resolve host name for http://mirrors.cloud.aliyuncs... [Could not resolve host: mirrors.cloud.aliyuncs.com]

错误：为 repo 'base' 下载元数据失败 : Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
[root@edr ~]#