How do I mount a network volume inside my Docker Windows container

Question

I need to share a network drive inside my Windows docker container under the A: drive. The network drive I need to shared is not empty, and I would need to access it with and right permissions. How can I achieve this? I've only found posts about people mapping their C: drive.

Should it be done during build or at runtime?

It tried the obvious

docker run -it --rm --name windows my/image --privileged -v \\\\ip\\mount\\my\\folder:A:\\my\\folder

but I get this error:

[Event Detail: onecore\vm\compute\management\orchestration\vmhostedcontainer\processmanagement.cpp(173)\vmcomputeagent.exe!00007FF6F8AFAE77: (caller: 00007FF6F8AAE4AB) Exception(2) tid(39c) 80070002 The system cannot find the file specified.
    CallContext:[\Bridge_ProcessMessage\VmHostedContainer_ExecuteProcess]

I'm using Docker Desktop 2.2.0.0 on Windows 10 Pro 1903

Edit: I should have set the image after the volumes it seems. With the following command, The error is different:

docker run -it --rm --name windows --privileged -v \\\\ip\\mount\\my\\folder:A:\\my\\folder my/image

docker: Error response from daemon: invalid volume specification: '\\\\ip\\mount\\my\\folder:A:my\\folder'

Answer 1

You need to create gMSAs for Docker container. Actually, th IT Team should do it for you (following this tutorial , for example). They will then provide you with a credentials file. You can then run your docker container with:

docker run -it --rm --name windows --security-opt "credentialspec=file://my_credentials.json" my/image

then, in the container, you can use net use to mount your volume under the letter you want. You can't do it in the container run command, however.