问题描述：

docker出现以下问题：

<code>error pulling image configuration: download failed after attempts=6: dial tcp 157.240.16.50:443: connect: connection refused

解决办法

试了下网上更改为国内源没有办法，依然是连接拒绝.

输入以下指令即可：

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'

{

"registry-mirrors": [

"https://do.nark.eu.org",

"https://dc.j8.work",

"https://docker.m.daocloud.io",

"https://dockerproxy.com",

"https://docker.mirrors.ustc.edu.cn",

"https://docker.nju.edu.cn"

]

}

EOF

sudo systemctl daemon-reload

sudo systemctl restart docker

}

拉取成功