Unable to find a match: docker-ce 失败的原因是安装源的问题:

CentOS Stream 9配置yum清华源记录

清华源：https://mirrors.tuna.tsinghua.edu.cn/centos-stream/9-stream/

1. 备份centos.repo

mv /etc/yum.repos.d/centos.repo /etc/yum.repos.d/centos.repo.bak

2. 编辑centos.repo

vi /etc/yum.repos.d/centos.repo

[BaseOS]

name=CentOS Stream $releasever - BaseOS

#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=BaseOS&infra=$infra

baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-stream/9-stream/BaseOS/x86_64/os/

gpgcheck=1

enabled=1

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

[Appstream]

name=CentOS Stream $releasever - AppStream

#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=AppStream&infra=$infra

baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-stream/9-stream/AppStream/x86_64/os/

gpgcheck=1

enabled=1

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

3. 清除缓存

yum clean all

1

4.重新生成yum缓存文件

yum makecache

1

5.升级yum更新包

yum update

1

end

原文链接：https://blog.csdn.net/qq_44870331/article/details/121462277