This is a simple docker container to mount a CIFS share and expose it to other docker containers. This leverages autofs, so should automatically reconnect if the network is dropped or server restarts.
IMPORTANT: The mounts assume read-write. I apply permissions on the server side, so it doesn't matter much on this container. If you need to constrain permissions in the client, or don't use a username/password, then this solution probably won't work for you.
DIR = The mount directory (e.g., \\server\<MOUNT DIRECTORY>)
SERVER = The server being mounted (e.g., \\<SERVER>\mounted_directory)
UID = UID for the mounted files (defaults to 1000)
GID = GID for the mounted files (defaults to 1000)
USERNAME = Username for the SMB server
PASSWORD = Password for the SMB server
The resulting mount will be exposed as a volume in /mount/<DIR>/. This allows multiple containers to manage several connections to the same server for different directories. All of these can then be used by another container.
For example...
Creating a connection to \\myserver\mydir
docker run --name mount -e "SERVER=myserver" -e "DIR=mydir" -e "USERNAME=rose" -e "PASSWORD=tyler" --cap-add SYS_ADMIN --cap-add DAC_READ_SEARCH mount
IMPORTANT: You need to include --cap-add SYS_ADMIN --cap-add DAC_READ_SEARCH for the mount to work. --privileged will also do the trick, but you don't need to grant that many permissions to the container.