Docker 构建centos镜像yum报错,语言包下载报错

报错场景：

docek pull centos 下来后，在centos中使用yum命令报错（这里的centos是最新的没有加版本号）

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2022/6/5 第一行加上版本号 centos：7 否则后面下载yum命令会报找不到代码源错误，因为centos不更新了

问题描述

1. docker 构建centos镜像使用yum install 命令报错:

# 报错内容
Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                       68  B/s |  38  B     00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal                   mirrorlist: No URLs in mirrorlist

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2. 根据报错内容，去下载语言包报错

# 查看语言包
[root@ae87167a11ae etc]# locale -a
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_COLLATE to default locale: No such file or directory
C
C.utf8
POSIX

# 尝试生成语言环境数据库
[root@ae87167a11ae etc]# source /etc/environment
[root@ae87167a11ae etc]# localedef -v -c -i en_US -f UTF-8 en_US.UTF-8
failed to set locale!
[error] character map file `UTF-8' not found: No such file or directory
failed to set locale!
[error] default character map file `ANSI_X3.4-1968' not found: No such file or d                  irectory
[root@ae87167a11ae etc]# yum install vm
Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                       77  B/s |  38  B     00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal                   mirrorlist: No URLs in mirrorlist

# 尝试安装 语言包
[root@ae87167a11ae etc]# dnf install glibc-langpack-en
Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                      2.4  B/s |  38  B     00:15
Errors during downloading metadata for repository 'appstream':
  - Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/                  ?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: m                  irrorlist.centos.org]
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal                   mirrorlist: No URLs in mirrorlist
[root@ae87167a11ae etc]# dnf install glibc-langpack-en
Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                       25  B/s |  38  B     00:01
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal                   mirrorlist: No URLs in mirrorlist
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原因分析&解决方案：

以上尝试解决方法均未成功,原因是cenos8停服，后继版本为8-steam，当然也可以pull centos:7.0的镜像