解决Docker 配置 daemon.json文件后无法生效

vim /etc/docker/daemon.json

 在daemon中配置一下dns

{"registry-mirrors": ["https://docker.m.daocloud.io","https://hub-mirror.c.163.com","https://dockerproxy.com","https://docker.mirrors.ustc.edu.cn","https://docker.nju.edu.cn"],"dns" : ["114.114.114.114","8.8.8.8"]
}

 检测：

docker run hello-world