Description of problem:

In order to calculate free space correctly, free needs to be based on free_space value.
Is it possible to backport CapacityFilter class in [2] to Juno based OSP?


  [1] openstack-cinder-2014.2.4-2.el7ost.noarch
   29 class CapacityFilter(filters.BaseHostFilter):
   30     """CapacityFilter filters based on volume host's capacity utilization."""
   31 
   32     def host_passes(self, host_state, filter_properties):
     ...
   55         reserved = float(host_state.reserved_percentage) / 100
   56         free = math.floor(free_space * (1 - reserved))


  [2] openstack-cinder-2015.1.2-5.el7ost.noarch
   31 class CapacityFilter(filters.BaseHostFilter):
   32     """CapacityFilter filters based on volume host's capacity utilization."""
   33 
   34     def host_passes(self, host_state, filter_properties):
     ...
   50         free_space = host_state.free_capacity_gb
   51         total_space = host_state.total_capacity_gb
   52         reserved = float(host_state.reserved_percentage) / 100
     ...
   78         free = free_space - math.floor(total * reserved)

Rgds,
Shinobu

Version-Release number of selected component (if applicable):

  [1] openstack-cinder-2014.2.4-2.el7ost.noarch.rpm

How reproducible:

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