def adjust(self,
adjustment,
adjustment_type=sc_util.CFN_CHANGE_IN_CAPACITY,
min_adjustment_step=None):
"""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]
})
raise exception.NoActionRequired()
capacity = grouputils.get_size(self)
new_capacity = self._get_new_capacity(capacity, adjustment,
adjustment_type,
min_adjustment_step)
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._update_groupwatch()
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):
"""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]})
raise exception.NoActionRequired()
capacity = grouputils.get_size(self)
new_capacity = self._get_new_capacity(capacity, adjustment,
adjustment_type,
min_adjustment_step)
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._update_groupwatch()
self._finished_scaling("%s : %s" % (adjustment_type, adjustment),
changed_size=changed_size)
return changed_size
def handle_update(self, json_snippet, tmpl_diff, prop_diff):
"""Updates self.properties, if Properties has changed.
If Properties has changed, update self.properties, so we get the new
values during any subsequent adjustment.
"""
if tmpl_diff:
# parse update policy
if 'UpdatePolicy' in tmpl_diff:
up = json_snippet.update_policy(self.update_policy_schema,
self.context)
self.update_policy = up
self.properties = json_snippet.properties(self.properties_schema,
self.context)
if prop_diff:
# Replace instances first if launch configuration has changed
self._try_rolling_update(prop_diff)
# Update will happen irrespective of whether auto-scaling
# is in progress or not.
capacity = grouputils.get_size(self)
desired_capacity = self.properties[self.DESIRED_CAPACITY] or capacity
new_capacity = self._get_new_capacity(capacity, desired_capacity)
self.resize(new_capacity)
def handle_update(self, json_snippet, tmpl_diff, prop_diff):
"""Updates self.properties, if Properties has changed.
If Properties has changed, update self.properties, so we get the new
values during any subsequent adjustment.
"""
if tmpl_diff:
# parse update policy
if 'UpdatePolicy' in tmpl_diff:
up = json_snippet.update_policy(self.update_policy_schema,
self.context)
self.update_policy = up
self.properties = json_snippet.properties(self.properties_schema,
self.context)
if prop_diff:
# Replace instances first if launch configuration has changed
self._try_rolling_update(prop_diff)
# Update will happen irrespective of whether auto-scaling
# is in progress or not.
capacity = grouputils.get_size(self)
desired_capacity = self.properties[self.DESIRED_CAPACITY] or capacity
new_capacity = self._get_new_capacity(capacity, desired_capacity)
self.resize(new_capacity)
def handle_update(self, json_snippet, tmpl_diff, prop_diff):
"""Updates self.properties, if Properties has changed.
If Properties has changed, update self.properties, so we
get the new values during any subsequent adjustment.
"""
if tmpl_diff:
# parse update policy
if rsrc_defn.UPDATE_POLICY in tmpl_diff:
up = json_snippet.update_policy(self.update_policy_schema,
self.context)
self.update_policy = up
self.properties = json_snippet.properties(self.properties_schema,
self.context)
if prop_diff:
# Replace instances first if launch configuration has changed
self._try_rolling_update(prop_diff)
# Get the current capacity, we may need to adjust if
# Size has changed
if self.properties[self.SIZE] is not None:
self.resize(self.properties[self.SIZE])
else:
curr_size = grouputils.get_size(self)
self.resize(curr_size)
def handle_update(self, json_snippet, tmpl_diff, prop_diff):
"""Updates self.properties, if Properties has changed.
If Properties has changed, update self.properties, so we
get the new values during any subsequent adjustment.
"""
if tmpl_diff:
# parse update policy
if rsrc_defn.UPDATE_POLICY in tmpl_diff:
up = json_snippet.update_policy(self.update_policy_schema,
self.context)
self.update_policy = up
self.properties = json_snippet.properties(self.properties_schema,
self.context)
if prop_diff:
# Replace instances first if launch configuration has changed
self._try_rolling_update(prop_diff)
# Get the current capacity, we may need to adjust if
# Size has changed
if self.properties[self.SIZE] is not None:
self.resize(self.properties[self.SIZE])
else:
curr_size = grouputils.get_size(self)
self.resize(curr_size)
def check_update_complete(self, cookie):
"""Update the cooldown timestamp after update succeeds."""
done = super(AutoScalingGroup, self).check_update_complete(cookie)
if done:
self._finished_scaling(
"%s : %s" % (sc_util.CFN_EXACT_CAPACITY,
grouputils.get_size(self)))
return done
def check_update_complete(self, cookie):
"""Update the cooldown timestamp after update succeeds."""
done = super(AutoScalingGroup, self).check_update_complete(cookie)
if done:
self._finished_scaling(
"%s : %s" %
(sc_util.CFN_EXACT_CAPACITY, grouputils.get_size(self)))
return done
def check_create_complete(self, task):
"""Update cooldown timestamp after create succeeds."""
done = super(AutoScalingGroup, self).check_create_complete(task)
if done:
self._create_groupwatch()
self._finished_scaling(
"%s : %s" % (sc_util.CFN_EXACT_CAPACITY,
grouputils.get_size(self)))
return done
def check_create_complete(self, task):
"""Update cooldown timestamp after create succeeds."""
done = super(AutoScalingGroup, self).check_create_complete(task)
if done:
self._create_groupwatch()
self._finished_scaling(
"%s : %s" %
(sc_util.CFN_EXACT_CAPACITY, grouputils.get_size(self)))
return done
def get_attribute(self, key, *path):
if key == self.CURRENT_SIZE:
return grouputils.get_size(self)
if path:
members = grouputils.get_members(self)
attrs = ((rsrc.name, rsrc.FnGetAtt(*path)) for rsrc in members)
if key == self.OUTPUTS:
return dict(attrs)
if key == self.OUTPUTS_LIST:
return [value for name, value in attrs]
if key.startswith("resource."):
return grouputils.get_nested_attrs(self, key, True, *path)
raise exception.InvalidTemplateAttribute(resource=self.name,
key=key)