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[Russell Bryant <1184622@xxxxxxxxxxxxxxxxxx>]

I disagree.  If one of these filters is filtering out a host, it's for a
good reason.

Feel free to bring this up on the openstack-dev list.

** Tags added: scheduler

** Changed in: nova
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1184622

Title:
  Change scheduler_default_filters to AllHostsFilter in host_manager.py

Status in OpenStack Compute (Nova):
  Won't Fix

Bug description:
  Currently in OpenStack nova, if did not set scheduler_default_filters,
  then it will use default values as following:

  cfg.ListOpt('scheduler_default_filters',
               default=[
                 'RetryFilter',
                 'AvailabilityZoneFilter',
                 'RamFilter',
                 'ComputeFilter',
                 'ComputeCapabilitiesFilter',
                 'ImagePropertiesFilter'
                 ],
               help='Which filter class names to use for filtering hosts '
                     'when not specified in the request.'),

  And customer often encounter error as "No valid host" because one of
  the above filters failed during scheduling, it is better that we
  change the default value to AllHostsFilter, this can make sure
  scheduler can always succeed.

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