Docker for Mac: Could not find ~/Library/Containers/com.docker.docker/Data/vms/0/tty to access volume location

Symptom:

If we want to access the volume location on the host machine, we normally inspect the volume to get the location on the host machine:

$ docker volume inspect todo-db|grep Mountpoint
        "Mountpoint": "/var/lib/docker/volumes/todo-db/_data",

For Linux host machine, it is straightforward. 

But for Mac, the Docker commands are running inside a small VM. So we normally use below command to login Docker's VM on Mac firstly:

screen ~/Library/Containers/com.docker.docker/Data/vms/0/tty

However in latest Docker Desktop for Mac version,  "tty" does not exist so it will fail to login.

Env:

Docker Desktop for Mac 20.10.3

MacOS Catalina

Root Cause:

This issue is recorded as a bug. 

This stackoverflow discussion though this issue is since version 2.3.0.4 of Docker Desktop for Mac.

Solution:

Below the issue is fixed, use below workaround instead:

docker run -it --privileged --pid=host debian nsenter -t 1 -m -u -n -i sh

And then we can see the volume location on host:

/ # ls -altr /var/lib/docker/volumes/todo-db/_data
total 16
drwx-----x    3 root     root          4096 Mar  3 21:40 ..
-rw-r--r--    1 root     root          8192 Mar  3 21:42 todo.db
drwxr-xr-x    2 root     root          4096 Mar  3 21:42 .