openstack/ironic-inspector
Code Issues Proposed changes

Merge "Terminal state transitions in transactions"

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Zuul 2017-12-22 19:04:46 +00:00 committed by Gerrit Code Review
commit 8e1f3ede1c
10 changed files with 315 additions and 254 deletions
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<g id="node8" class="node">
<title>waiting</title>
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<g id="edge11" class="edge">
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Before

Width:  |  Height:  |  Size: 15 KiB

After

Width:  |  Height:  |  Size: 17 KiB

36
ironic_inspector/introspect.py
View File

@ -56,22 +56,12 @@ def introspect(node_id, token=None):
bmc_address=bmc_address,
ironic=ironic)
def _handle_exceptions(fut):
try:
fut.result()
except utils.Error as exc:
# Logging has already happened in Error.__init__
node_info.finished(error=str(exc))
except Exception as exc:
msg = _('Unexpected exception in background introspection thread')
LOG.exception(msg, node_info=node_info)
node_info.finished(error=msg)
future = utils.executor().submit(_background_introspect, ironic, node_info)
future.add_done_callback(_handle_exceptions)
utils.executor().submit(_background_introspect, node_info, ironic)
def _background_introspect(ironic, node_info):
@node_cache.release_lock
@node_cache.fsm_transition(istate.Events.wait)
def _background_introspect(node_info, ironic):
global _LAST_INTROSPECTION_TIME
LOG.debug('Attempting to acquire lock on last introspection time')
@ -85,13 +75,9 @@ def _background_introspect(ironic, node_info):
_LAST_INTROSPECTION_TIME = time.time()
node_info.acquire_lock()
try:
_background_introspect_locked(node_info, ironic)
finally:
node_info.release_lock()
_background_introspect_locked(node_info, ironic)
@node_cache.fsm_transition(istate.Events.wait)
def _background_introspect_locked(node_info, ironic):
# TODO(dtantsur): pagination
macs = list(node_info.ports())
@ -151,17 +137,10 @@ def abort(node_id, token=None):
@node_cache.release_lock
@node_cache.fsm_transition(istate.Events.abort, reentrant=False)
@node_cache.fsm_event_before(istate.Events.abort)
def _abort(node_info, ironic):
# runs in background
if node_info.finished_at is not None:
# introspection already finished; nothing to do
LOG.info('Cannot abort introspection as it is already '
'finished', node_info=node_info)
node_info.release_lock()
return
# finish the introspection
LOG.debug('Forcing power-off', node_info=node_info)
try:
ironic.node.set_power_state(node_info.uuid, 'off')
@ -169,7 +148,8 @@ def _abort(node_info, ironic):
LOG.warning('Failed to power off node: %s', exc,
node_info=node_info)
node_info.finished(error=_('Canceled by operator'))
node_info.finished(istate.Events.abort_end,
error=_('Canceled by operator'))
# block this node from PXE Booting the introspection image
try:

16
ironic_inspector/introspection_state.py
View File

@ -18,6 +18,8 @@ from automaton import machines
class States(object):
"""States of an introspection."""
# received a request to abort the introspection
aborting = 'aborting'
# received introspection data from a nonexistent node
# active - the inspector performs an operation on the node
enrolling = 'enrolling'
@ -44,7 +46,7 @@ class States(object):
def all(cls):
"""Return a list of all states."""
return [cls.starting, cls.waiting, cls.processing, cls.finished,
cls.error, cls.reapplying, cls.enrolling]
cls.error, cls.reapplying, cls.enrolling, cls.aborting]
class Events(object):
@ -52,6 +54,9 @@ class Events(object):
# cancel a waiting node introspection
# API, user
abort = 'abort'
# finish the abort request
# internal
abort_end = 'abort_end'
# mark an introspection failed
# internal
error = 'error'
@ -82,6 +87,13 @@ class Events(object):
# Error transition is allowed in any state.
State_space = [
{
'name': States.aborting,
'next_states': {
Events.abort_end: States.error,
Events.timeout: States.error,
}
},
{
'name': States.enrolling,
'next_states': {
@ -135,7 +147,7 @@ State_space = [
{
'name': States.waiting,
'next_states': {
Events.abort: States.error,
Events.abort: States.aborting,
Events.process: States.processing,
Events.start: States.starting,
Events.timeout: States.error,

43
ironic_inspector/migrations/versions/18440d0834af_introducing_the_aborting_state.py Normal file
View File

@ -0,0 +1,43 @@
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Introducing the aborting state
Revision ID: 18440d0834af
Revises: 882b2d84cb1b
Create Date: 2017-12-11 15:40:13.905554
"""
# revision identifiers, used by Alembic.
revision = '18440d0834af'
down_revision = '882b2d84cb1b'
branch_labels = None
depends_on = None
from alembic import op
import sqlalchemy as sa
from sqlalchemy import sql
from ironic_inspector import introspection_state as istate
old_state = sa.Enum(*(set(istate.States.all()) - {istate.States.aborting}),
name='node_state')
new_state = sa.Enum(*istate.States.all(), name='node_state')
Node = sql.table('nodes', sql.column('state', old_state))
def upgrade():
with op.batch_alter_table('nodes') as batch_op:
batch_op.alter_column('state', existing_type=old_state,
type_=new_state)

21
ironic_inspector/node_cache.py
View File

@ -211,8 +211,8 @@ class NodeInfo(object):
"""Update node_info.state based on a fsm.process_event(event) call.
An AutomatonException triggers an error event.
If strict, node_info.finished(error=str(exc)) is called with the
AutomatonException instance and a EventError raised.
If strict, node_info.finished(istate.Events.error, error=str(exc))
is called with the AutomatonException instance and a EventError raised.
:param event: an event to process by the fsm
:strict: whether to fail the introspection upon an invalid event
@ -229,8 +229,7 @@ class NodeInfo(object):
if strict:
LOG.error(msg, node_info=self)
# assuming an error event is always possible
fsm.process_event(istate.Events.error)
self.finished(error=str(exc))
self.finished(istate.Events.error, error=str(exc))
else:
LOG.warning(msg, node_info=self)
raise utils.NodeStateInvalidEvent(str(exc), node_info=self)
@ -273,19 +272,21 @@ class NodeInfo(object):
db.Option(uuid=self.uuid, name=name, value=encoded).save(
session)
def finished(self, error=None):
"""Record status for this node.
def finished(self, event, error=None):
"""Record status for this node and process a terminal transition.
Also deletes look up attributes from the cache.
:param event: the event to process
:param error: error message
"""
self.release_lock()
self.release_lock()
self.finished_at = timeutils.utcnow()
self.error = error
with db.ensure_transaction() as session:
self.fsm_event(event)
self._commit(finished_at=self.finished_at, error=self.error)
db.model_query(db.Attribute, session=session).filter_by(
node_uuid=self.uuid).delete()
@ -553,7 +554,7 @@ def triggers_fsm_error_transition(errors=(Exception,),
'func': reflection.get_callable_name(func)},
node_info=node_info)
# an error event should be possible from all states
node_info.fsm_event(istate.Events.error)
node_info.finished(istate.Events.error, error=str(exc))
return ret
return inner
return outer
@ -899,8 +900,8 @@ def clean_up():
'while introspection in "%s" state',
node_info.state,
node_info=node_info)
node_info.fsm_event(istate.Events.timeout)
node_info.finished(error='Introspection timeout')
node_info.finished(
istate.Events.timeout, error='Introspection timeout')
finally:
node_info.release_lock()

19
ironic_inspector/process.py
View File

@ -205,7 +205,7 @@ def process(introspection_data):
msg = _('The following failures happened during running '
'pre-processing hooks:\n%s') % '\n'.join(failures)
if node_info is not None:
node_info.finished(error='\n'.join(failures))
node_info.finished(istate.Events.error, error='\n'.join(failures))
_store_logs(introspection_data, node_info)
raise utils.Error(msg, node_info=node_info, data=introspection_data)
@ -228,13 +228,13 @@ def process(introspection_data):
node = node_info.node()
except ir_utils.NotFound as exc:
with excutils.save_and_reraise_exception():
node_info.finished(error=str(exc))
node_info.finished(istate.Events.error, error=str(exc))
_store_logs(introspection_data, node_info)
try:
result = _process_node(node_info, node, introspection_data)
except utils.Error as exc:
node_info.finished(error=str(exc))
node_info.finished(istate.Events.error, error=str(exc))
with excutils.save_and_reraise_exception():
_store_logs(introspection_data, node_info)
except Exception as exc:
@ -242,7 +242,7 @@ def process(introspection_data):
msg = _('Unexpected exception %(exc_class)s during processing: '
'%(error)s') % {'exc_class': exc.__class__.__name__,
'error': exc}
node_info.finished(error=msg)
node_info.finished(istate.Events.error, error=msg)
_store_logs(introspection_data, node_info)
raise utils.Error(msg, node_info=node_info, data=introspection_data,
code=500)
@ -282,7 +282,7 @@ def _process_node(node_info, node, introspection_data):
return resp
@node_cache.fsm_transition(istate.Events.finish)
@node_cache.triggers_fsm_error_transition()
def _finish(node_info, ironic, introspection_data, power_off=True):
if power_off:
LOG.debug('Forcing power off of node %s', node_info.uuid)
@ -299,13 +299,12 @@ def _finish(node_info, ironic, introspection_data, power_off=True):
'its power management configuration: '
'%(exc)s') % {'node': node_info.uuid, 'exc':
exc})
node_info.finished(error=msg)
raise utils.Error(msg, node_info=node_info,
data=introspection_data)
LOG.info('Node powered-off', node_info=node_info,
data=introspection_data)
node_info.finished()
node_info.finished(istate.Events.finish)
LOG.info('Introspection finished successfully',
node_info=node_info, data=introspection_data)
@ -348,7 +347,7 @@ def _reapply(node_info):
msg = (_('Unexpected exception %(exc_class)s while fetching '
'unprocessed introspection data from Swift: %(error)s') %
{'exc_class': exc.__class__.__name__, 'error': exc})
node_info.finished(error=msg)
node_info.finished(istate.Events.error, error=msg)
return
try:
@ -357,14 +356,12 @@ def _reapply(node_info):
msg = _('Encountered an exception while getting the Ironic client: '
'%s') % exc
LOG.error(msg, node_info=node_info, data=introspection_data)
node_info.fsm_event(istate.Events.error)
node_info.finished(error=msg)
node_info.finished(istate.Events.error, error=msg)
return
try:
_reapply_with_data(node_info, introspection_data)
except Exception as exc:
node_info.finished(error=str(exc))
return
_finish(node_info, ironic, introspection_data,

42
ironic_inspector/test/unit/test_introspect.py
View File

@ -21,6 +21,7 @@ from oslo_config import cfg
from ironic_inspector.common import ironic as ir_utils
from ironic_inspector import introspect
from ironic_inspector import introspection_state as istate
from ironic_inspector import node_cache
from ironic_inspector.pxe_filter import base as pxe_filter
from ironic_inspector.test import base as test_base
@ -135,7 +136,7 @@ class TestIntrospect(BaseTest):
cli.node.set_power_state.assert_called_once_with(self.uuid,
'reboot')
start_mock.return_value.finished.assert_called_once_with(
error=mock.ANY)
introspect.istate.Events.error, error=mock.ANY)
self.node_info.acquire_lock.assert_called_once_with()
self.node_info.release_lock.assert_called_once_with()
@ -153,7 +154,7 @@ class TestIntrospect(BaseTest):
ironic=cli)
self.assertFalse(cli.node.set_boot_device.called)
start_mock.return_value.finished.assert_called_once_with(
error=mock.ANY)
introspect.istate.Events.error, error=mock.ANY)
self.node_info.acquire_lock.assert_called_once_with()
self.node_info.release_lock.assert_called_once_with()
@ -186,7 +187,8 @@ class TestIntrospect(BaseTest):
introspect.introspect(self.uuid)
self.node_info.ports.assert_called_once_with()
self.node_info.finished.assert_called_once_with(error=mock.ANY)
self.node_info.finished.assert_called_once_with(
introspect.istate.Events.error, error=mock.ANY)
self.assertEqual(0, self.sync_filter_mock.call_count)
self.assertEqual(0, cli.node.set_power_state.call_count)
self.node_info.acquire_lock.assert_called_once_with()
@ -311,6 +313,10 @@ class TestAbort(BaseTest):
super(TestAbort, self).setUp()
self.node_info.started_at = None
self.node_info.finished_at = None
# NOTE(milan): node_info.finished() is a mock; no fsm_event call, then
self.fsm_calls = [
mock.call(istate.Events.abort, strict=False),
]
def test_ok(self, client_mock, get_mock):
cli = self._prepare(client_mock)
@ -326,8 +332,9 @@ class TestAbort(BaseTest):
self.node_info.acquire_lock.assert_called_once_with(blocking=False)
self.sync_filter_mock.assert_called_once_with(cli)
cli.node.set_power_state.assert_called_once_with(self.uuid, 'off')
self.node_info.finished.assert_called_once_with(error='Canceled '
'by operator')
self.node_info.finished.assert_called_once_with(
introspect.istate.Events.abort_end, error='Canceled by operator')
self.node_info.fsm_event.assert_has_calls(self.fsm_calls)
def test_node_not_found(self, client_mock, get_mock):
cli = self._prepare(client_mock)
@ -340,6 +347,7 @@ class TestAbort(BaseTest):
self.assertEqual(0, self.sync_filter_mock.call_count)
self.assertEqual(0, cli.node.set_power_state.call_count)
self.assertEqual(0, self.node_info.finished.call_count)
self.assertEqual(0, self.node_info.fsm_event.call_count)
def test_node_locked(self, client_mock, get_mock):
cli = self._prepare(client_mock)
@ -353,19 +361,7 @@ class TestAbort(BaseTest):
self.assertEqual(0, self.sync_filter_mock.call_count)
self.assertEqual(0, cli.node.set_power_state.call_count)
self.assertEqual(0, self.node_info.finshed.call_count)
def test_introspection_already_finished(self, client_mock, get_mock):
cli = self._prepare(client_mock)
get_mock.return_value = self.node_info
self.node_info.acquire_lock.return_value = True
self.node_info.started_at = time.time()
self.node_info.finished_at = time.time()
introspect.abort(self.uuid)
self.assertEqual(0, self.sync_filter_mock.call_count)
self.assertEqual(0, cli.node.set_power_state.call_count)
self.assertEqual(0, self.node_info.finshed.call_count)
self.assertEqual(0, self.node_info.fsm_event.call_count)
def test_firewall_update_exception(self, client_mock, get_mock):
cli = self._prepare(client_mock)
@ -382,8 +378,9 @@ class TestAbort(BaseTest):
self.node_info.acquire_lock.assert_called_once_with(blocking=False)
self.sync_filter_mock.assert_called_once_with(cli)
cli.node.set_power_state.assert_called_once_with(self.uuid, 'off')
self.node_info.finished.assert_called_once_with(error='Canceled '
'by operator')
self.node_info.finished.assert_called_once_with(
introspect.istate.Events.abort_end, error='Canceled by operator')
self.node_info.fsm_event.assert_has_calls(self.fsm_calls)
def test_node_power_off_exception(self, client_mock, get_mock):
cli = self._prepare(client_mock)
@ -400,5 +397,6 @@ class TestAbort(BaseTest):
self.node_info.acquire_lock.assert_called_once_with(blocking=False)
self.sync_filter_mock.assert_called_once_with(cli)
cli.node.set_power_state.assert_called_once_with(self.uuid, 'off')
self.node_info.finished.assert_called_once_with(error='Canceled '
'by operator')
self.node_info.finished.assert_called_once_with(
introspect.istate.Events.abort_end, error='Canceled by operator')
self.node_info.fsm_event.assert_has_calls(self.fsm_calls)

6
ironic_inspector/test/unit/test_node_cache.py
View File

@ -500,7 +500,7 @@ class TestNodeInfoFinished(test_base.NodeTest):
session)
def test_success(self):
self.node_info.finished()
self.node_info.finished(istate.Events.finish)
session = db.get_writer_session()
with session.begin():
@ -514,7 +514,7 @@ class TestNodeInfoFinished(test_base.NodeTest):
session=session).all())
def test_error(self):
self.node_info.finished(error='boom')
self.node_info.finished(istate.Events.error, error='boom')
self.assertEqual((datetime.datetime(1, 1, 1), 'boom'),
tuple(db.model_query(db.Node.finished_at,
@ -524,7 +524,7 @@ class TestNodeInfoFinished(test_base.NodeTest):
def test_release_lock(self):
self.node_info.acquire_lock()
self.node_info.finished()
self.node_info.finished(istate.Events.finish)
self.assertFalse(self.node_info._locked)

53
ironic_inspector/test/unit/test_process.py
View File

@ -140,7 +140,8 @@ class TestProcess(BaseProcessTest):
process.process, self.data)
self.cli.node.get.assert_called_once_with(self.uuid)
self.assertFalse(self.process_mock.called)
self.node_info.finished.assert_called_once_with(error=mock.ANY)
self.node_info.finished.assert_called_once_with(
istate.Events.error, error=mock.ANY)
def test_already_finished(self):
self.node_info.finished_at = timeutils.utcnow()
@ -155,7 +156,8 @@ class TestProcess(BaseProcessTest):
self.assertRaisesRegex(utils.Error, 'boom',
process.process, self.data)
self.node_info.finished.assert_called_once_with(error='boom')
self.node_info.finished.assert_called_once_with(
istate.Events.error, error='boom')
def test_unexpected_exception(self):
self.process_mock.side_effect = RuntimeError('boom')
@ -166,6 +168,7 @@ class TestProcess(BaseProcessTest):
self.assertEqual(500, ctx.exception.http_code)
self.node_info.finished.assert_called_once_with(
istate.Events.error,
error='Unexpected exception RuntimeError during processing: boom')
def test_hook_unexpected_exceptions(self):
@ -179,7 +182,7 @@ class TestProcess(BaseProcessTest):
process.process, self.data)
self.node_info.finished.assert_called_once_with(
error=mock.ANY)
istate.Events.error, error=mock.ANY)
error_message = self.node_info.finished.call_args[1]['error']
self.assertIn('RuntimeError', error_message)
self.assertIn('boom', error_message)
@ -422,7 +425,7 @@ class TestProcessNode(BaseTest):
self.assertFalse(self.cli.node.validate.called)
post_hook_mock.assert_called_once_with(self.data, self.node_info)
finished_mock.assert_called_once_with(mock.ANY)
finished_mock.assert_called_once_with(mock.ANY, istate.Events.finish)
def test_port_failed(self):
self.cli.port.create.side_effect = (
@ -445,9 +448,9 @@ class TestProcessNode(BaseTest):
self.cli.node.set_power_state.assert_called_once_with(self.uuid, 'off')
finished_mock.assert_called_once_with(
mock.ANY,
mock.ANY, istate.Events.error,
error='Failed to power off node %s, check its power '
'management configuration: boom' % self.uuid
'management configuration: boom' % self.uuid
)
@mock.patch.object(example_plugin.ExampleProcessingHook, 'before_update')
@ -460,7 +463,8 @@ class TestProcessNode(BaseTest):
self.assertTrue(post_hook_mock.called)
self.assertTrue(self.cli.node.set_power_state.called)
finished_mock.assert_called_once_with(self.node_info)
finished_mock.assert_called_once_with(
self.node_info, istate.Events.finish)
@mock.patch.object(node_cache.NodeInfo, 'finished', autospec=True)
def test_no_power_off(self, finished_mock):
@ -468,7 +472,8 @@ class TestProcessNode(BaseTest):
process._process_node(self.node_info, self.node, self.data)
self.assertFalse(self.cli.node.set_power_state.called)
finished_mock.assert_called_once_with(self.node_info)
finished_mock.assert_called_once_with(
self.node_info, istate.Events.finish)
@mock.patch.object(process.swift, 'SwiftAPI', autospec=True)
def test_store_data(self, swift_mock):
@ -524,6 +529,7 @@ class TestReapply(BaseTest):
pop_mock.return_value = node_cache.NodeInfo(
uuid=self.node.uuid,
started_at=self.started_at)
pop_mock.return_value.finished = mock.Mock()
pop_mock.return_value.acquire_lock = mock.Mock()
return func(self, pop_mock, *args, **kw)
@ -604,8 +610,7 @@ class TestReapplyNode(BaseTest):
return wrapper
@prepare_mocks
def test_ok(self, finished_mock, swift_mock, apply_mock,
post_hook_mock):
def test_ok(self, finished_mock, swift_mock, apply_mock, post_hook_mock):
swift_name = 'inspector_data-%s' % self.uuid
swift_mock.get_object.return_value = json.dumps(self.data)
@ -623,7 +628,8 @@ class TestReapplyNode(BaseTest):
# assert no power operations were performed
self.assertFalse(self.cli.node.set_power_state.called)
finished_mock.assert_called_once_with(self.node_info)
finished_mock.assert_called_once_with(
self.node_info, istate.Events.finish)
# asserting validate_interfaces was called
self.assertEqual(self.pxe_interfaces, swifted_data['interfaces'])
@ -639,9 +645,8 @@ class TestReapplyNode(BaseTest):
)
@prepare_mocks
def test_get_incomming_data_exception(self, finished_mock,
swift_mock, apply_mock,
post_hook_mock):
def test_get_incomming_data_exception(self, finished_mock, swift_mock,
apply_mock, post_hook_mock):
exc = Exception('Oops')
expected_error = ('Unexpected exception Exception while fetching '
'unprocessed introspection data from Swift: Oops')
@ -652,12 +657,12 @@ class TestReapplyNode(BaseTest):
self.assertFalse(swift_mock.create_object.called)
self.assertFalse(apply_mock.called)
self.assertFalse(post_hook_mock.called)
finished_mock.assert_called_once_with(self.node_info,
expected_error)
finished_mock.assert_called_once_with(
self.node_info, istate.Events.error, error=expected_error)
@prepare_mocks
def test_prehook_failure(self, finished_mock, swift_mock,
apply_mock, post_hook_mock):
def test_prehook_failure(self, finished_mock, swift_mock, apply_mock,
post_hook_mock):
CONF.set_override('processing_hooks', 'example',
'processing')
plugins_base._HOOKS_MGR = None
@ -676,23 +681,23 @@ class TestReapplyNode(BaseTest):
'preprocessing in hook example: %(error)s' %
{'exc_class': type(exc).__name__, 'error':
exc})
finished_mock.assert_called_once_with(self.node_info,
error=exc_failure)
finished_mock.assert_called_once_with(
self.node_info, istate.Events.error, error=exc_failure)
# assert _reapply ended having detected the failure
self.assertFalse(swift_mock.create_object.called)
self.assertFalse(apply_mock.called)
self.assertFalse(post_hook_mock.called)
@prepare_mocks
def test_generic_exception_creating_ports(self, finished_mock,
swift_mock, apply_mock,
post_hook_mock):
def test_generic_exception_creating_ports(self, finished_mock, swift_mock,
apply_mock, post_hook_mock):
swift_mock.get_object.return_value = json.dumps(self.data)
exc = Exception('Oops')
self.cli.port.create.side_effect = exc
self.call()
finished_mock.assert_called_once_with(self.node_info, error=str(exc))
finished_mock.assert_called_once_with(
self.node_info, istate.Events.error, error=str(exc))
self.assertFalse(swift_mock.create_object.called)
self.assertFalse(apply_mock.called)
self.assertFalse(post_hook_mock.called)

12
releasenotes/notes/db-status-consistency-enhancements-f97fbaccfc81a60b.yaml Normal file
View File

@ -0,0 +1,12 @@
---
upgrade:
- |
A new state ``aborting`` was introduced to distinguish between the node
introspection abort precondition (being able to perform the state
transition from the ``waiting`` state) from the activities necessary to
abort an ongoing node introspection (power-off, set finished timestamp
etc.)
fixes:
- |
The ``node_info.finished(<transition>, error=<error>)`` now updates node
state together with other status attributes in a single DB transaction.