def update_task(self, newstack, action=UPDATE, event=None):
if action not in (self.UPDATE, self.ROLLBACK, self.RESTORE):
LOG.error(_LE("Unexpected action %s passed to update!"), action)
self.state_set(self.UPDATE, self.FAILED,
"Invalid action %s" % action)
return
try:
lifecycle_plugin_utils.do_pre_ops(self.context, self, newstack,
action)
except Exception as e:
self.state_set(
action, self.FAILED,
e.args[0] if e.args else 'Failed stack pre-ops: %s' %
six.text_type(e))
return
if self.status == self.IN_PROGRESS:
if action == self.ROLLBACK:
LOG.debug("Starting update rollback for %s" % self.name)
else:
self.state_set(action, self.FAILED,
'State invalid for %s' % action)
return
self.state_set(action, self.IN_PROGRESS, 'Stack %s started' % action)
if action == self.UPDATE:
# Oldstack is useless when the action is not UPDATE , so we don't
# need to build it, this can avoid some unexpected errors.
oldstack = Stack(self.context, self.name, copy.deepcopy(self.t),
self.env)
backup_stack = self._backup_stack()
try:
update_task = update.StackUpdate(
self,
newstack,
backup_stack,
rollback=action == self.ROLLBACK,
error_wait_time=cfg.CONF.error_wait_time)
updater = scheduler.TaskRunner(update_task)
self.env = newstack.env
self.parameters = newstack.parameters
self.t.files = newstack.t.files
self.disable_rollback = newstack.disable_rollback
self.timeout_mins = newstack.timeout_mins
self._set_param_stackid()
try:
updater.start(timeout=self.timeout_secs())
yield
while not updater.step():
if event is None or not event.ready():
yield
else:
message = event.wait()
if message == rpc_api.THREAD_CANCEL:
raise ForcedCancel()
finally:
self.reset_dependencies()
if action == self.UPDATE:
reason = 'Stack successfully updated'
elif action == self.RESTORE:
reason = 'Stack successfully restored'
else:
reason = 'Stack rollback completed'
stack_status = self.COMPLETE
except scheduler.Timeout:
stack_status = self.FAILED
reason = 'Timed out'
except ForcedCancel as e:
reason = six.text_type(e)
stack_status = self.FAILED
if action == self.UPDATE:
update_task.updater.cancel_all()
yield self.update_task(oldstack, action=self.ROLLBACK)
return
except exception.ResourceFailure as e:
reason = six.text_type(e)
stack_status = self.FAILED
if action == self.UPDATE:
# If rollback is enabled, we do another update, with the
# existing template, so we roll back to the original state
if not self.disable_rollback:
yield self.update_task(oldstack, action=self.ROLLBACK)
return
else:
LOG.debug('Deleting backup stack')
backup_stack.delete(backup=True)
# flip the template to the newstack values
self.t = newstack.t
template_outputs = self.t[self.t.OUTPUTS]
self.outputs = self.resolve_static_data(template_outputs)
# Don't use state_set to do only one update query and avoid race
# condition with the COMPLETE status
self.action = action
self.status = stack_status
self.status_reason = reason
self.store()
lifecycle_plugin_utils.do_post_ops(self.context, self, newstack,
action,
(self.status == self.FAILED))
notification.send(self)
def update_task(self, newstack, action=UPDATE):
if action not in (self.UPDATE, self.ROLLBACK):
logger.error(_("Unexpected action %s passed to update!") % action)
self.state_set(self.UPDATE, self.FAILED,
"Invalid action %s" % action)
return
if self.status != self.COMPLETE:
if (action == self.ROLLBACK
and self.state == (self.UPDATE, self.IN_PROGRESS)):
logger.debug(_("Starting update rollback for %s") % self.name)
else:
self.state_set(action, self.FAILED,
'State invalid for %s' % action)
return
self.state_set(self.UPDATE, self.IN_PROGRESS,
'Stack %s started' % action)
oldstack = Stack(self.context, self.name, self.t, self.env)
backup_stack = self._backup_stack()
try:
update_task = update.StackUpdate(self,
newstack,
backup_stack,
rollback=action == self.ROLLBACK)
updater = scheduler.TaskRunner(update_task)
self.env = newstack.env
self.parameters = newstack.parameters
self.t.files = newstack.t.files
self._set_param_stackid()
try:
updater.start(timeout=self.timeout_secs())
yield
while not updater.step():
yield
finally:
self.reset_dependencies()
if action == self.UPDATE:
reason = 'Stack successfully updated'
else:
reason = 'Stack rollback completed'
stack_status = self.COMPLETE
except scheduler.Timeout:
stack_status = self.FAILED
reason = 'Timed out'
except exception.ResourceFailure as e:
reason = str(e)
stack_status = self.FAILED
if action == self.UPDATE:
# If rollback is enabled, we do another update, with the
# existing template, so we roll back to the original state
if not self.disable_rollback:
yield self.update_task(oldstack, action=self.ROLLBACK)
return
else:
logger.debug(_('Deleting backup stack'))
backup_stack.delete(backup=True)
self.state_set(action, stack_status, reason)
# flip the template to the newstack values
# Note we do this on success and failure, so the current
# stack resources are stored, even if one is in a failed
# state (otherwise we won't remove them on delete)
self.t = newstack.t
template_outputs = self.t[self.t.OUTPUTS]
self.outputs = self.resolve_static_data(template_outputs)
self.store()
def update_task(self, newstack, action=UPDATE):
if action not in (self.UPDATE, self.ROLLBACK):
LOG.error(_("Unexpected action %s passed to update!") % action)
self.state_set(self.UPDATE, self.FAILED,
"Invalid action %s" % action)
return
if self.status != self.COMPLETE:
if (action == self.ROLLBACK
and self.state == (self.UPDATE, self.IN_PROGRESS)):
LOG.debug("Starting update rollback for %s" % self.name)
else:
self.state_set(action, self.FAILED,
'State invalid for %s' % action)
return
self.state_set(action, self.IN_PROGRESS, 'Stack %s started' % action)
oldstack = Stack(self.context, self.name, copy.deepcopy(self.t),
self.env)
backup_stack = self._backup_stack()
try:
update_task = update.StackUpdate(self,
newstack,
backup_stack,
rollback=action == self.ROLLBACK)
updater = scheduler.TaskRunner(update_task)
self.env = newstack.env
self.parameters = newstack.parameters
self.t.files = newstack.t.files
self.disable_rollback = newstack.disable_rollback
self.timeout_mins = newstack.timeout_mins
self._set_param_stackid()
try:
updater.start(timeout=self.timeout_secs())
yield
while not updater.step():
yield
finally:
self.reset_dependencies()
if action == self.UPDATE:
reason = 'Stack successfully updated'
else:
reason = 'Stack rollback completed'
stack_status = self.COMPLETE
except scheduler.Timeout:
stack_status = self.FAILED
reason = 'Timed out'
except exception.ResourceFailure as e:
reason = six.text_type(e)
stack_status = self.FAILED
if action == self.UPDATE:
# If rollback is enabled, we do another update, with the
# existing template, so we roll back to the original state
if not self.disable_rollback:
yield self.update_task(oldstack, action=self.ROLLBACK)
return
else:
LOG.debug('Deleting backup stack')
backup_stack.delete(backup=True)
# flip the template to the newstack values
self.t = newstack.t
template_outputs = self.t[self.t.OUTPUTS]
self.outputs = self.resolve_static_data(template_outputs)
# Don't use state_set to do only one update query and avoid race
# condition with the COMPLETE status
self.action = action
self.status = stack_status
self.status_reason = reason
self.store()
notification.send(self)
def update(self, newstack, action=UPDATE):
'''
Compare the current stack with newstack,
and where necessary create/update/delete the resources until
this stack aligns with newstack.
Note update of existing stack resources depends on update
being implemented in the underlying resource types
Update will fail if it exceeds the specified timeout. The default is
60 minutes, set in the constructor
'''
if action not in (self.UPDATE, self.ROLLBACK):
logger.error("Unexpected action %s passed to update!" % action)
self.state_set(self.UPDATE, self.FAILED,
"Invalid action %s" % action)
return
if self.status != self.COMPLETE:
if (action == self.ROLLBACK
and self.state == (self.UPDATE, self.IN_PROGRESS)):
logger.debug("Starting update rollback for %s" % self.name)
else:
self.state_set(action, self.FAILED,
'State invalid for %s' % action)
return
self.state_set(self.UPDATE, self.IN_PROGRESS,
'Stack %s started' % action)
oldstack = Stack(self.context, self.name, self.t, self.env)
try:
update_task = update.StackUpdate(self, newstack, oldstack)
updater = scheduler.TaskRunner(update_task)
self.env = newstack.env
self.parameters = newstack.parameters
try:
updater(timeout=self.timeout_secs())
finally:
cur_deps = self._get_dependencies(self.resources.itervalues())
self.dependencies = cur_deps
if action == self.UPDATE:
reason = 'Stack successfully updated'
else:
reason = 'Stack rollback completed'
stack_status = self.COMPLETE
except scheduler.Timeout:
stack_status = self.FAILED
reason = 'Timed out'
except exception.ResourceFailure as e:
reason = str(e)
stack_status = self.FAILED
if action == self.UPDATE:
# If rollback is enabled, we do another update, with the
# existing template, so we roll back to the original state
if not self.disable_rollback:
self.update(oldstack, action=self.ROLLBACK)
return
self.state_set(action, stack_status, reason)
# flip the template to the newstack values
# Note we do this on success and failure, so the current
# stack resources are stored, even if one is in a failed
# state (otherwise we won't remove them on delete)
self.t = newstack.t
template_outputs = self.t[template.OUTPUTS]
self.outputs = self.resolve_static_data(template_outputs)
self.store()
