When fifo creates new VM it creates zfs dataset with reserved space.
If actually system has space, and it shows with zpool list, zfs list /zones actually shows less space, and new VM's can't be created. No error pops up, cerberus shows "installing dataset".
I think chunter needs to be fixed to take free space from zfs list /zones command, not zpool list.
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
zones 544G 255G 289G - 70% 46% 1.00x ONLINE -
zfs list /zones
NAME USED AVAIL REFER MOUNTPOINT
zones 461G 66.3G 468K /zones