1. 使用DNF添加并启用官方Docker CE存储库。在终端窗口中输入以下命令:

2. 安装containerd.io包手动

3. 安装最新版docer ce

4. 启用docker

5. 添加当前用户加入docker用户组

6. 关闭防火墙

7. 重新登录，可以使用了

8. 修改阿里镜像：修改前：
   mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
   #baseurl=http://mirror.centos.org/contentdir/contentdir/releasever/AppStream/$basearch/os/
   修改后：
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
   baseurl=http://mirrors.aliyun.com/centos/releasever/AppStream/releasever/AppStream/basearch/os/

sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

sudo dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.10-3.2.el7.x86_64.rpm

sudo dnf install docker-ce -y --nobest

sudo systemctl enable --now docker

sudo usermod -aG docker $USER

sudo systemctl disable firewalld

docker images

[Author@localhost yum.repos.d]$ cat CentOS-Stream-AppStream.repo
# CentOS-Stream-AppStream.repo
#
# The mirrorlist system uses the connecting IP address of the client and the
# update status of each mirror to pick current mirrors that are geographically
# close to the client.  You should use this for CentOS updates unless you are
# manually picking other mirrors.
#
# If the mirrorlist does not work for you, you can try the commented out
# baseurl line instead.

[appstream]
name=CentOS Stream $releasever - AppStream
#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=AppStream&infra=$infra
baseurl=http://mirror.aliyun.org/$contentdir/$stream/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial