一、安裝須要的軟件包， yum-util 提供yum-config-manager功能，另外兩個是devicemapper驅動依賴的
yum install -y yum-utils device-mapper-persistent-data lvm2linux
二、設置yum源
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repodocker
三、安裝docker
yum install docker-cejson
四、啓動並加入開機啓動
systemctl start docker systemctl enable docker
五、配置阿里雲加速器
mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://******.mirror.aliyuncs.com"]
}
EOF
systemctl daemon-reload
systemctl restart docker