is it possible change the location for the loopback device backing /var/snap/microstack/common/cinder-lvm.img ?
I am thinking I should be able stop microstack services, export the vg, delete the loop, move the img file, recreate the loop, reimport vg, update config setups and then start services.
per the journal log there are a few config options and potential hard coding. still looking for an angle.