def _schedule_instance(self, context, instance_opts, *_args, **_kwargs):
"""Picks a host that is up and has the fewest running instances."""
elevated = context.elevated()
availability_zone = instance_opts.get('availability_zone')
zone, host = FLAGS.default_schedule_zone, None
if availability_zone:
zone, _x, host = availability_zone.partition(':')
if host and context.is_admin:
service = db.service_get_by_args(elevated, host, 'nova-compute')
if not self.service_is_up(service):
raise exception.WillNotSchedule(host=host)
return host
results = db.service_get_all_compute_sorted(elevated)
if zone:
results = [(service, cores) for (service, cores) in results
if service['availability_zone'] == zone]
for result in results:
(service, instance_cores) = result
if instance_cores + instance_opts['vcpus'] > FLAGS.max_cores:
msg = _("Not enough allocatable CPU cores remaining")
raise exception.NoValidHost(reason=msg)
if self.service_is_up(service):
return service['host']
msg = _("Is the appropriate service running?")
raise exception.NoValidHost(reason=msg)
def schedule_create_volume(self, context, volume_id, *_args, **_kwargs):
"""Picks a host that is up and has the fewest volumes."""
elevated = context.elevated()
volume_ref = db.volume_get(context, volume_id)
availability_zone = volume_ref.get('availability_zone')
zone, host = None, None
if availability_zone:
zone, _x, host = availability_zone.partition(':')
if host and context.is_admin:
service = db.service_get_by_args(elevated, host, 'nova-volume')
if not self.service_is_up(service):
raise exception.WillNotSchedule(host=host)
driver.cast_to_volume_host(context, host, 'create_volume',
volume_id=volume_id, **_kwargs)
return None
results = db.service_get_all_volume_sorted(elevated)
if zone:
results = [(service, gigs) for (service, gigs) in results
if service['availability_zone'] == zone]
for result in results:
(service, volume_gigabytes) = result
if volume_gigabytes + volume_ref['size'] > FLAGS.max_gigabytes:
msg = _("All hosts have too many gigabytes")
raise exception.NoValidHost(reason=msg)
if self.service_is_up(service):
driver.cast_to_volume_host(context, service['host'],
'create_volume', volume_id=volume_id, **_kwargs)
return None
msg = _("Is the appropriate service running?")
raise exception.NoValidHost(reason=msg)
def _check_host_enforcement(self, context, availability_zone):
if (availability_zone and ':' in availability_zone
and context.is_admin):
zone, _x, host = availability_zone.partition(':')
service = db.service_get_by_args(context.elevated(), host,
'nova-volume')
if not self.service_is_up(service):
raise exception.WillNotSchedule(host=host)
return host
else:
return None
def schedule_create_volume(self, context, volume_id, snapshot_id,
image_id):
"""Picks a host that is up and has the fewest volumes."""
deprecated.warn(
_('nova-volume functionality is deprecated in Folsom '
'and will be removed in Grizzly. Volumes are now handled '
'by Cinder'))
elevated = context.elevated()
volume_ref = db.volume_get(context, volume_id)
availability_zone = volume_ref.get('availability_zone')
zone, host = None, None
if availability_zone:
zone, _x, host = availability_zone.partition(':')
if host and context.is_admin:
service = db.service_get_by_args(elevated, host, 'nova-volume')
if not utils.service_is_up(service):
raise exception.WillNotSchedule(host=host)
driver.cast_to_volume_host(context,
host,
'create_volume',
volume_id=volume_id,
snapshot_id=snapshot_id,
image_id=image_id)
return None
results = db.service_get_all_volume_sorted(elevated)
if zone:
results = [(service, gigs) for (service, gigs) in results
if service['availability_zone'] == zone]
for result in results:
(service, volume_gigabytes) = result
if volume_gigabytes + volume_ref['size'] > FLAGS.max_gigabytes:
msg = _("Not enough allocatable volume gigabytes remaining")
raise exception.NoValidHost(reason=msg)
if utils.service_is_up(service) and not service['disabled']:
driver.cast_to_volume_host(context,
service['host'],
'create_volume',
volume_id=volume_id,
snapshot_id=snapshot_id,
image_id=image_id)
return None
msg = _("Is the appropriate service running?")
raise exception.NoValidHost(reason=msg)
def _schedule_instance(self, context, instance_opts, *_args, **_kwargs):
"""Picks a host that is up and has the fewest running instances."""
elevated = context.elevated()
availability_zone = instance_opts.get('availability_zone')
zone, host = FLAGS.default_schedule_zone, None
if availability_zone:
zone, _x, host = availability_zone.partition(':')
if host and context.is_admin:
service = db.service_get_by_args(elevated, host, 'nova-compute')
if not utils.service_is_up(service):
raise exception.WillNotSchedule(host=host)
return host
results = db.service_get_all_compute_sorted(elevated)
in_isolation = instance_opts['image_ref'] in FLAGS.isolated_images
check_cores = not in_isolation or not FLAGS.skip_isolated_core_check
if zone:
results = [(service, cores) for (service, cores) in results
if service['availability_zone'] == zone]
for result in results:
(service, instance_cores) = result
if in_isolation and service['host'] not in FLAGS.isolated_hosts:
# isloated images run on isolated hosts
continue
if service['host'] in FLAGS.isolated_hosts and not in_isolation:
# images that aren't isolated only run on general hosts
continue
if (check_cores and
instance_cores + instance_opts['vcpus'] > FLAGS.max_cores):
msg = _("Not enough allocatable CPU cores remaining")
raise exception.NoValidHost(reason=msg)
if utils.service_is_up(service) and not service['disabled']:
return service['host']
msg = _("Is the appropriate service running?")
raise exception.NoValidHost(reason=msg)