1、卸载旧版本
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
2、安装 Docker Engine-Community
sudo yum install -y yum-utils \
device-mapper-persistent-data \
lvm2
3、设置稳定仓库
sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
4、设置阿里镜像
yum install -y https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.13-3.1.el7.x86_64.rpm
5、安装 Docker Engine-Community
sudo yum install docker-ce docker-ce-cli containerd.io
若Centos8安装Docker提示：package docker-ce-3:19.03.8-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed则执行yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm
6、启动 Docker
sudo systemctl start docker
7、通过运行 hello-world 映像来验证是否正确安装了 Docker Engine-Community
sudo docker run hello-world
8、设置docker开机自启
sudo systemctl start docker
