众所周知，centos 7 在2024年6月30日，生命周期结束，官方不再进行支持维护，而很多环境一时之间无法完全更新替换操作系统，因此对于yum源还是需要的，特别是对于互联网环境来说，在线yum源使用方便很多，而不需要去搭建本地yum源和内网yum源。

这里以阿里云为例，其他国内开源镜像站类似。此处主要以7.9为例。

1. 备份默认的repo文件

<code>cd /etc/yum.repos.d

mkdir backup

mv *.repo backup

2.配置阿里云的yum源

cat > CentOS-aliyun-lhr.repo << 'EOF'

[base]

name=CentOS-$releasever - Base - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/

http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/

http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#released updates

[updates]

name=CentOS-$releasever - Updates - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/

http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/

http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/

http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/

http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/

http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/

http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/

http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/

http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

EOF

cat > epel-aliyun.repo <<'EOF'

[epel]

name=Extra Packages for Enterprise Linux 7 - $basearch

baseurl=http://mirrors.aliyun.com/epel/7/$basearch

failovermethod=priority

enabled=1

gpgcheck=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

[epel-debuginfo]

name=Extra Packages for Enterprise Linux 7 - $basearch - Debug

baseurl=http://mirrors.aliyun.com/epel/7/$basearch/debug

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

gpgcheck=0

[epel-source]

name=Extra Packages for Enterprise Linux 7 - $basearch - Source

baseurl=http://mirrors.aliyun.com/epel/7/SRPMS

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

gpgcheck=0

EOF

 3. 检查验证

yum clean all

yum makecache fast

yum install vim lrzsz wget curl net-tools

4. 其他可用yum源搜集

1）官方yum源

cat > CentOS-Base.repo <<'EOF'

[base]

name=CentOS-7.9.2009

enabled=1

failovermethod=priority

baseurl=https://vault.centos.org/7.9.2009/os/$basearch/

gpgcheck=1

gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-7

[updates]

name=CentOS-7.9.2009

enabled=1

failovermethod=priority

baseurl=https://vault.centos.org/7.9.2009/updates/$basearch/

gpgcheck=1

gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-7

[extras]

name=CentOS-7.9.2009

enabled=1

failovermethod=priority

baseurl=https://vault.centos.org/7.9.2009/extras/$basearch/

gpgcheck=1

gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-7

EOF

 2）官方epel扩展源

cat > epel.repo <<'EOF'

[epel]

name=Extra Packages for Enterprise Linux 7 - $basearch

#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch

metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch

failovermethod=priority

enabled=1

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

[epel-debuginfo]

name=Extra Packages for Enterprise Linux 7 - $basearch - Debug

#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch/debug

metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=$basearch

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

gpgcheck=1

[epel-source]

name=Extra Packages for Enterprise Linux 7 - $basearch - Source

#baseurl=http://download.fedoraproject.org/pub/epel/7/SRPMS

metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=$basearch

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

gpgcheck=1

EOF

cat > epel-testing.repo <<'EOF'

[epel-testing]

name=Extra Packages for Enterprise Linux 7 - Testing - $basearch

#baseurl=http://download.fedoraproject.org/pub/epel/testing/7/$basearch

metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-epel7&arch=$basearch

failovermethod=priority

enabled=0

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

[epel-testing-debuginfo]

name=Extra Packages for Enterprise Linux 7 - Testing - $basearch - Debug

#baseurl=http://download.fedoraproject.org/pub/epel/testing/7/$basearch/debug

metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-debug-epel7&arch=$basearch

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

gpgcheck=1

[epel-testing-source]

name=Extra Packages for Enterprise Linux 7 - Testing - $basearch - Source

#baseurl=http://download.fedoraproject.org/pub/epel/testing/7/SRPMS

metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-source-epel7&arch=$basearch

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

gpgcheck=1

EOF

3） 清华大学yum源

cat > CentOS-tsinghua.repo <<'EOF'

[base]

name=CentOS-7.9.2009

enabled=1

failovermethod=priority

baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.9.2009/os/$basearch/

gpgcheck=1

gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7

[updates]

name=CentOS-7.9.2009

enabled=1

failovermethod=priority

baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.9.2009/updates/$basearch/

gpgcheck=1

gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7

[extras]

name=CentOS-7.9.2009

enabled=1

failovermethod=priority

baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.9.2009/extras/$basearch/

gpgcheck=1

gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7

[epel]

name=Extra Packages for Enterprise Linux 7 -

enabled=1

failovermethod=priority

baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch/

gpgcheck=0

gpgkey=https://mirrors.tuna.tsinghua.edu.cn/epel/RPM-GPG-KEY-EPEL-7

EOF

4）中科大yum源

cat > CentOS-ustc.repo <<'EOF'

[base]

name=CentOS- - Base

baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/os/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[updates]

name=CentOS- - Updates

baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/updates/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[extras]

name=CentOS- - Extras

baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/extras/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[centosplus]

name=CentOS- - Plus

baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

EOF

5）网易yum源

cat > CentOS-163.repo <<'EOF'

[base]

name=CentOS-$releasever - Base - 163.com

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os

baseurl=http://mirrors.163.com/centos-vault/7.9.2009/os/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#released updates

[updates]

name=CentOS-$releasever - Updates - 163.com

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates

baseurl=http://mirrors.163.com/centos-vault/7.9.2009/updates/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras - 163.com

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras

baseurl=http://mirrors.163.com/centos-vault/7.9.2009/extras/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus - 163.com

baseurl=http://mirrors.163.com/centos-vault/7.9.2009/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

EOF

其他centos版本的yum源配置：

CentOS 6 在线可用yum源配置——筑梦之路_centos6可用yum源-CSDN博客

CentOS 8 停止维护后换可用yum源——筑梦之路_centos yum 阿里云镜像还支持吗-CSDN博客

参考资料：

https://www.cnblogs.com/yeziwinone/p/17916626.html

centos镜像_centos下载地址_centos安装教程-阿里巴巴开源镜像站