fix-docker-volume-invalid-mode-error.md

Fix Docker Volume Invalid Mode Error

Original Docker Volume Command

docker run -it --rm -v ${PWD}:/malware chadmando/dssuite

Returned this error:

docker: Error response from daemon: invalid mode: /malware.

UPDATE - This Fix Doesn't Solve the Problem

I confused silencing the error for fixing the problem. The error was gone but what I wanted, to mount the PWD to the container's /malware, folder wasn't happening. See The Real Problem for the fix.

To fix the error, I found this question on Stack Overflow. There are many opinions on how to fix the error. I tried variations until I found the minimal change required.

Fixed Docker Volume Command

docker run -it --rm -v '/${PWD}:/malware' chadmando/dssuite

The two changes that fixed the error:

• Add the front slash / before the ${PWD}
• Enclose the entire volume argument in single quotes '

The Real Problem

I want to mount the current working folder to the docker container's /malware folder.

The Real Cause

I was using a PSDrive aliased path in PowerShell.

Example

New-PSDrive -Name "dev" -PSProvider FileSystem -Root C:\dev

Set-Location dev:\

Solution

I was at dev:\ and trying to mount to the container. It wasn't happening. After starting the container, no files from the local folder were visible in the container.

Docker didn't like the aliased path dev:\. I used Covert-Path to move back to the Root.

Set-Location (Convert-Path $pwd)

This changed the $pwd to C:\dev. Now the local folder mounts to the container.