經(jīng)常拉取鏡像的時候很慢或者拉不下來，這里可以使用阿里云鏡像加速器：
wx@wx-virtual-machine:$ sudo tee /etc/docker/daemon.json <<-'EOF'
> {
> "registry-mirrors": ["https://9cpn8tt6.mirror.aliyuncs.com"]
> }
> EOF
{
"registry-mirrors": ["https://9cpn8tt6.mirror.aliyuncs.com"]
}
wx@wx-virtual-machine:$ systemctl daemon-reload
wx@wx-virtual-machine:$ systemctl restart docker
之后docker進行pull時就很快
