參考：https://www.cnblogs.com/snooker/p/10963377.html
注意：nvidia docker 修改配置檔案為/etc/systemd/system/docker.service.d/override.conf，可以通過systemctl status docker.service檢視具體配置檔案
root@ubuntu:/home/ubuntu# systemctl status docker.service
● docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/docker.service.d
└─devicemapper.conf, override.conf
Active: active (running) since Mon 2022-03-14 11:27:31 CST; 3min 45s ago
Docs: https://docs.docker.com
Main PID: 3702 (dockerd)
Tasks: 22
CGroup: /system.slice/docker.service
└─3702 /usr/bin/dockerd --graph=/mydata/docker/lib/docker --host=fd:// --add-runtime=nvidia=/usr/bin/nvidia-conta

同時參考：https://www.jb51.net/article/210483.htm ，修改/etc/docker/daemon.json，但是應該不用。

修改完，重新載入docker 後使用 docker info 檢視更目錄是否被修改