docker拉取镜像失败-----换源

docker报错：

error pulling image configuration: download failed after attempts=6: dial tcp 108.160.170.39:443: connect: connection refused出这个错误就是你源有问题

编辑Docker配置文件: 打开或创建 /etc/docker/daemon.json 文件

{
"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"
]
}

重启Docker服务: 为使配置生效，请执行以下命令：

sudo systemctl daemon-reload
sudo systemctl restart docker