更新apt仓库

sudo apt-get update

安装系统工具

sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common

安装gpg证书

curl -fsSL http://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -

添加docker软件源

sudo add-apt-repository "deb [arch=amd64] http://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"

安装docker

sudo apt-get install docker-ce docker-ce-cli containerd.io

运行docker

systemctl start docker

查看docker版本，验证是否安装成功

sudo docker version

如果输出结果中同时显示client和server就说明安装成功了

配置阿里云加速

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
	"registry-mirrors":["https://n5jclonh.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

#查看是否添加成功
cat /etc/docker/daemon.json