Ubuntu持久性生活的USB不能build立docker形象

我刚刚遇到这个问题，我目前的理解如下。

借助Ubuntu Live持久性USB，其工作原理是“写入时复制”以保持更改后的数据。 我刚刚通知/cow会挂载数据改变的path。 而且我猜这是Docker无法成功构build映像的根本原因。 原因是docker无法为其path已被/cow挂载的容器装载该path。

任何想法或解决scheme？

 $ sudo service docker status [sudo] password for vincent: ● docker.service - Docker Application Container Engine Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2017-12-07 00:58:15 CST; 21min ago Docs: https://docs.docker.com Main PID: 1865 (dockerd) Tasks: 21 Memory: 212.2M CPU: 21.886s CGroup: /system.slice/docker.service ├─1865 /usr/bin/dockerd -H fd:// └─1947 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/docker/libcontainer Dec 07 00:58:13 xubuntu dockerd[1865]: time="2017-12-07T00:58:13.494603400+08:00" level=warning msg="Your kernel does not support cgroup rt period" Dec 07 00:58:13 xubuntu dockerd[1865]: time="2017-12-07T00:58:13.494625280+08:00" level=warning msg="Your kernel does not support cgroup rt runtime" Dec 07 00:58:13 xubuntu dockerd[1865]: time="2017-12-07T00:58:13.495851240+08:00" level=info msg="Loading containers: start." Dec 07 00:58:14 xubuntu dockerd[1865]: time="2017-12-07T00:58:14.399879840+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon opt Dec 07 00:58:14 xubuntu dockerd[1865]: time="2017-12-07T00:58:14.719872040+08:00" level=info msg="Loading containers: done." Dec 07 00:58:15 xubuntu dockerd[1865]: time="2017-12-07T00:58:15.438080040+08:00" level=info msg="Docker daemon" commit=afdb6d4 graphdriver(s)=aufs version=17.09.0-ce Dec 07 00:58:15 xubuntu dockerd[1865]: time="2017-12-07T00:58:15.473704240+08:00" level=info msg="Daemon has completed initialization" Dec 07 00:58:15 xubuntu dockerd[1865]: time="2017-12-07T00:58:15.497969280+08:00" level=info msg="API listen on /var/run/docker.sock" Dec 07 00:58:15 xubuntu systemd[1]: Started Docker Application Container Engine. Dec 07 01:02:03 xubuntu dockerd[1865]: time="2017-12-07T01:02:03.935030535+08:00" level=warning msg="Couldn't run auplink before unmount /var/lib/docker/aufs/mnt/41ef6bfbe647d9c17