Linux – How to mount windows 10 drive on WSL home directory

Good news, it is now possible to mount USB media (including formatted as FAT) and network shares with drvfs on Windows 10:

Mount removable media: (e.g. D:)

$ sudo mkdir /mnt/d
$ sudo mount -t drvfs D: /mnt/d

To safely unmount

$ sudo umount /mnt/d

You can also mount network shares without smbfs:

$ sudo mount -t drvfs '\\server\share' /mnt/share

You need at least Build 16176 so you might have to opt-in to the Windows Insider programm and then update Windows. Source: https://blogs.msdn.microsoft.com/wsl/2017/04/18/file-system-improvements-to-the-windows-subsystem-for-linux/

Where is the Docker daemon running? I'm guessing it's running on a server somewhere or if you're using Docker for Windows (with Windows containers/LCOW), it's running on the host outside WSL. The bind mount is likely looking for "/home/username" on the host instead of inside the WSL environment where the Docker client is running. Based on your comment about /c and /d working, it sounds like these are getting mapped back to C:\ and D:\ drives on the host which suggests you're using Docker for Windows

From inside WSL, it looks like drives are mounted inside WSL but the rootfs lives on a virtual file system which would explain why /c and /d are working

nick@nick-desktop:/mnt$ mount
rootfs on / type lxfs (rw,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
none on /dev type tmpfs (rw,noatime,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,noatime,gid=5,mode=620)
none on /run type tmpfs (rw,nosuid,noexec,noatime,mode=755)
none on /run/lock type tmpfs (rw,nosuid,nodev,noexec,noatime)
none on /run/shm type tmpfs (rw,nosuid,nodev,noatime)
none on /run/user type tmpfs (rw,nosuid,nodev,noexec,noatime,mode=755)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noatime)
C: on /mnt/c type drvfs (rw,noatime,uid=1000,gid=1000)
W: on /mnt/w type drvfs (rw,noatime,uid=1000,gid=1000)
X: on /mnt/x type drvfs (rw,noatime,uid=1000,gid=1000)
Z: on /mnt/z type drvfs (rw,noatime,uid=1000,gid=1000)

Here is some documentation that talks about how the Linux rootfs in WSL works https://blogs.msdn.microsoft.com/wsl/2016/06/15/wsl-file-system-support/

The location in Windows WSL rootfs lives inside of is listed in KCU:\Software\Microsoft\Windows\CurrentVersion\Lxss (see https://github.com/Microsoft/WSL/issues/2578)

Here is some additional information on Docker architecture explaining the difference between Docker daemon and client https://docs.docker.com/engine/docker-overview/