centos7安装docker-ce

#uninstall docker
sudo yum remove docker                   docker-client                   docker-client-latest                   docker-common                   docker-latest                   docker-latest-logrotate                   docker-logrotate                   docker-engine


#install docker tools
sudo yum install -y yum-utils device-mapper-persistent-data lvm2

#Tsinghua University yum repository
sudo yum-config-manager --add-repo https://mydream.ink/utils/container/docker-ce.repo

#install docker-ce
sudo yum install docker-ce docker-ce-cli containerd.io

#image speed up 
mkdir -p /etc/docker
cat <<EOF >>/etc/docker/daemon.json
{
    "registry-mirrors": [
        "https://dockerhub.azk8s.cn",
        "https://reg-mirror.qiniu.com"
    ]
}
EOF

#start docker
sudo systemctl daemon-reload
sudo systemctl start docker