Add ability to set overlaytmpfs size
This is a feature request (but I don't think I'm allowed to set labels).
Sometimes half of RAM (the default if -t tmpfs -o size is not set) is way more than enough.
Being able to set overlaytmpfs_size (or shorter?) would let you free up RAM for other use (or the other way around) and enable you to provision less RAM than you need to now.
If noone beats me to it, I might produce a patch and MR in the future.