https://huaweicloud.csdn.net/63561b93d3efff3090b5a85f.html
cat /etc/docker/daemon.json
{ "exec-opts": ["native.cgroupdriver=systemd"], "data-root": "/ssd2/docker", "registry-mirrors": ["https://registry.hub.docker.com","http://hub-mirror.c.163.com","https://docker.mirrors.ustc.edu.cn","https://registry.docker-cn.com"], "insecure-registries": ["master:5000"] }