def test_calc(self):
self.assertEqual(
self.expected,
sc_util.calculate_new_capacity(self.current, self.adjustment,
self.adjustment_type,
self.min_adjustment_step,
self.minimum, self.maximum))
def test_calc(self):
self.assertEqual(self.expected,
sc_util.calculate_new_capacity(
self.current, self.adjustment,
self.adjustment_type,
self.min_adjustment_step,
self.minimum, self.maximum))
def adjust(self, adjustment,
adjustment_type=sc_util.CFN_CHANGE_IN_CAPACITY,
min_adjustment_step=None, signal=False):
"""Adjust the size of the scaling group if the cooldown permits."""
if not self._is_scaling_allowed():
LOG.info(_LI("%(name)s NOT performing scaling adjustment, "
"cooldown %(cooldown)s"),
{'name': self.name,
'cooldown': self.properties[self.COOLDOWN]})
if signal:
raise exception.NoActionRequired()
else:
return
capacity = grouputils.get_size(self)
lower = self.properties[self.MIN_SIZE]
upper = self.properties[self.MAX_SIZE]
new_capacity = sc_util.calculate_new_capacity(capacity, adjustment,
adjustment_type,
min_adjustment_step,
lower, upper)
changed_size = new_capacity != capacity
# send a notification before, on-error and on-success.
notif = {
'stack': self.stack,
'adjustment': adjustment,
'adjustment_type': adjustment_type,
'capacity': capacity,
'groupname': self.FnGetRefId(),
'message': _("Start resizing the group %(group)s") % {
'group': self.FnGetRefId()},
'suffix': 'start',
}
notification.send(**notif)
try:
self.resize(new_capacity)
except Exception as resize_ex:
with excutils.save_and_reraise_exception():
try:
notif.update({'suffix': 'error',
'message': six.text_type(resize_ex),
'capacity': grouputils.get_size(self),
})
notification.send(**notif)
except Exception:
LOG.exception(_LE('Failed sending error notification'))
else:
notif.update({
'suffix': 'end',
'capacity': new_capacity,
'message': _("End resizing the group %(group)s") % {
'group': notif['groupname']},
})
notification.send(**notif)
finally:
self._finished_scaling("%s : %s" % (adjustment_type, adjustment),
changed_size=changed_size)
return changed_size
def adjust(self, adjustment,
adjustment_type=sc_util.CFN_CHANGE_IN_CAPACITY,
min_adjustment_step=None, signal=False):
"""Adjust the size of the scaling group if the cooldown permits."""
if self._cooldown_inprogress():
LOG.info(_LI("%(name)s NOT performing scaling adjustment, "
"cooldown %(cooldown)s"),
{'name': self.name,
'cooldown': self.properties[self.COOLDOWN]})
if signal:
raise exception.NoActionRequired()
else:
return
capacity = grouputils.get_size(self)
lower = self.properties[self.MIN_SIZE]
upper = self.properties[self.MAX_SIZE]
new_capacity = sc_util.calculate_new_capacity(capacity, adjustment,
adjustment_type,
min_adjustment_step,
lower, upper)
# send a notification before, on-error and on-success.
notif = {
'stack': self.stack,
'adjustment': adjustment,
'adjustment_type': adjustment_type,
'capacity': capacity,
'groupname': self.FnGetRefId(),
'message': _("Start resizing the group %(group)s") % {
'group': self.FnGetRefId()},
'suffix': 'start',
}
notification.send(**notif)
try:
self.resize(new_capacity)
except Exception as resize_ex:
with excutils.save_and_reraise_exception():
try:
notif.update({'suffix': 'error',
'message': six.text_type(resize_ex),
'capacity': grouputils.get_size(self),
})
notification.send(**notif)
except Exception:
LOG.exception(_LE('Failed sending error notification'))
else:
notif.update({
'suffix': 'end',
'capacity': new_capacity,
'message': _("End resizing the group %(group)s") % {
'group': notif['groupname']},
})
notification.send(**notif)
finally:
self._cooldown_timestamp("%s : %s" % (adjustment_type,
adjustment))
def _get_new_capacity(self, capacity,
adjustment,
adjustment_type=sc_util.CFN_EXACT_CAPACITY,
min_adjustment_step=None):
lower = self.properties[self.MIN_SIZE]
upper = self.properties[self.MAX_SIZE]
return sc_util.calculate_new_capacity(capacity, adjustment,
adjustment_type,
min_adjustment_step,
lower, upper)
def _get_new_capacity(self, capacity,
adjustment,
adjustment_type=sc_util.CFN_EXACT_CAPACITY,
min_adjustment_step=None):
lower = self.properties[self.MIN_SIZE]
upper = self.properties[self.MAX_SIZE]
return sc_util.calculate_new_capacity(capacity, adjustment,
adjustment_type,
min_adjustment_step,
lower, upper)
