Mount SMB/CIFS share within a Docker container

Question

I have a web application running in a Docker container. This application needs to access some files on our corporate file server (Windows Server with an Active Directory dom

Answer 1

Do not make your containers less secure by exposing many ports just to mount a share. Or by running it as --privileged

Here is how I solved this issue:

• First mount the volume on the server that runs docker.

sudo mount -t cifs -o username=YourUserName,uid=$(id -u),gid=$(id -g) //SERVER/share ~/WinShare

Change the username, SERVER and WinShare here. This will ask your sudo password, then it will ask password for the remote share.

Let's assume you created WinShare folder inside your home folder. After running this command you should be able to see all the shared folders and files in WinShare folder. In addition to that since you use the uidand gid tags you will have write access without using sudo all the time.

• Now you can run your container by using -v tag and share a volume between the server and the container.

Let's say you ran it like the following.

docker run -d --name mycontainer -v /home/WinShare:/home 2d244422164

You should be able to access the windows share and modify it from your container now.

To test it just do:

docker exec -it yourRunningContainer /bin/bash

cd /Home

touch testdocfromcontainer.txt

You should see testdocfromcontainer.txt in the windows share.