If osd_size var not found/set it's calculated based on the
first osd disk size found on deploy host. This references another
variable osd_devices which might not be set. To avoid miscalculation
assert 'osd_devices' variable is set before calculating 'osd_size'.
If osd_size var not found/set it's calculated based on the first osd disk size found on deploy host. This references another variable osd_devices which might not be set. To avoid miscalculation assert 'osd_devices' variable is set before calculating 'osd_size'.