I figured you could get around some of the storage limitations with something like persistent volume claims. I'm testing it out at the moment. I am a big fan of LXC.
I see a few people have created docker Samba Containers and I'm giving them a whirl. Can't say much for stability but I think it's an interesting experiment.
I know in the past smb server didn't work in LXC containers because certain kernel modules caused conflicts.