https://docs.docker.com/engine/install/centos/
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
yum install -y yum-utils
yum-config-manager \ --add-repo \ http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache fast
yum install docker-ce docker-ce-cli containerd.io
下面这一步选择 y
然后会出现下面这种情况：（官网已经给了我们提示）指纹匹配选择 y
systemctl start docker
docker version
docker run hello-world
出现Hello from Docker说明测试成功
