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ironic-inspector/ironic_inspector/process.py

394 lines
16 KiB

# 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.
"""Handling introspection data from the ramdisk."""
import copy
import datetime
import os
from oslo_config import cfg
from oslo_serialization import base64
from oslo_utils import excutils
from oslo_utils import timeutils
from ironic_inspector.common.i18n import _
from ironic_inspector.common import ironic as ir_utils
from ironic_inspector import introspection_state as istate
from ironic_inspector import node_cache
from ironic_inspector.plugins import base as plugins_base
from ironic_inspector.pxe_filter import base as pxe_filter
from ironic_inspector import rules
from ironic_inspector import utils
CONF = cfg.CONF
LOG = utils.getProcessingLogger(__name__)
_STORAGE_EXCLUDED_KEYS = {'logs'}
def _store_logs(introspection_data, node_info):
logs = introspection_data.get('logs')
if not logs:
LOG.warning('No logs were passed by the ramdisk',
data=introspection_data, node_info=node_info)
return
if not CONF.processing.ramdisk_logs_dir:
LOG.warning('Failed to store logs received from the ramdisk '
'because ramdisk_logs_dir configuration option '
'is not set',
data=introspection_data, node_info=node_info)
return
fmt_args = {
'uuid': node_info.uuid if node_info is not None else 'unknown',
'mac': (utils.get_pxe_mac(introspection_data) or
'unknown').replace(':', ''),
'dt': datetime.datetime.utcnow(),
'bmc': (utils.get_ipmi_address_from_data(introspection_data) or
'unknown')
}
file_name = CONF.processing.ramdisk_logs_filename_format.format(**fmt_args)
try:
if not os.path.exists(CONF.processing.ramdisk_logs_dir):
os.makedirs(CONF.processing.ramdisk_logs_dir)
with open(os.path.join(CONF.processing.ramdisk_logs_dir, file_name),
'wb') as fp:
fp.write(base64.decode_as_bytes(logs))
except EnvironmentError:
LOG.exception('Could not store the ramdisk logs',
data=introspection_data, node_info=node_info)
else:
LOG.info('Ramdisk logs were stored in file %s', file_name,
data=introspection_data, node_info=node_info)
def _find_node_info(introspection_data, failures):
try:
address = utils.get_ipmi_address_from_data(introspection_data)
v6address = utils.get_ipmi_v6address_from_data(introspection_data)
bmc_addresses = list(filter(None, [address, v6address]))
macs = utils.get_valid_macs(introspection_data)
return node_cache.find_node(bmc_address=bmc_addresses,
mac=macs)
except utils.NotFoundInCacheError as exc:
if CONF.processing.permit_active_introspection:
try:
return node_cache.record_node(bmc_addresses=bmc_addresses,
macs=macs)
except utils.NotFoundInCacheError:
LOG.debug(
'Active nodes introspection is enabled, but no node '
'was found for MAC(s) %(mac)s and BMC address(es) '
'%(addr)s; proceeding with discovery',
{'mac': ', '.join(macs) if macs else None,
'addr': ', '.join(filter(None, bmc_addresses)) or None})
not_found_hook = plugins_base.node_not_found_hook_manager()
if not_found_hook is None:
failures.append(_('Look up error: %s') % exc)
return
LOG.debug('Running node_not_found_hook %s',
CONF.processing.node_not_found_hook,
data=introspection_data)
# NOTE(sambetts): If not_found_hook is not none it means that we were
# unable to find the node in the node cache and there is a node not
# found hook defined so we should try to send the introspection data
# to that hook to generate the node info before bubbling up the error.
try:
node_info = not_found_hook.driver(introspection_data)
if node_info:
return node_info
failures.append(_("Node not found hook returned nothing"))
except Exception as exc:
failures.append(_("Node not found hook failed: %s") % exc)
except utils.Error as exc:
failures.append(_('Look up error: %s') % exc)
def _run_pre_hooks(introspection_data, failures):
hooks = plugins_base.processing_hooks_manager()
for hook_ext in hooks:
LOG.debug('Running pre-processing hook %s', hook_ext.name,
data=introspection_data)
# NOTE(dtantsur): catch exceptions, so that we have changes to update
# node introspection status after look up
try:
hook_ext.obj.before_processing(introspection_data)
except utils.Error as exc:
LOG.error('Hook %(hook)s failed, delaying error report '
'until node look up: %(error)s',
{'hook': hook_ext.name, 'error': exc},
data=introspection_data)
failures.append('Preprocessing hook %(hook)s: %(error)s' %
{'hook': hook_ext.name, 'error': exc})
except Exception as exc:
LOG.exception('Hook %(hook)s failed, delaying error report '
'until node look up: %(error)s',
{'hook': hook_ext.name, 'error': exc},
data=introspection_data)
failures.append(_('Unexpected exception %(exc_class)s during '
'preprocessing in hook %(hook)s: %(error)s') %
{'hook': hook_ext.name,
'exc_class': exc.__class__.__name__,
'error': exc})
def _filter_data_excluded_keys(data):
return {k: v for k, v in data.items()
if k not in _STORAGE_EXCLUDED_KEYS}
def store_introspection_data(node_uuid, data, processed=True):
"""Store introspection data to the storage backend.
:param node_uuid: node UUID
:param data: Introspection data to be saved
:param processed: The type of introspection data, set to True means the
introspection data is processed, otherwise unprocessed.
:raises: utils.Error
"""
introspection_data_manager = plugins_base.introspection_data_manager()
store = CONF.processing.store_data
ext = introspection_data_manager[store].obj
ext.save(node_uuid, data, processed)
def _store_unprocessed_data(node_uuid, data):
# runs in background
try:
store_introspection_data(node_uuid, data, processed=False)
except Exception:
LOG.exception('Encountered exception saving unprocessed '
'introspection data for node %s', node_uuid, data=data)
def get_introspection_data(uuid, processed=True, get_json=False):
"""Get introspection data from the storage backend.
:param uuid: node UUID
:param processed: Indicates the type of introspection data to be read,
set True to request processed introspection data.
:param get_json: Specify whether return the introspection data in json
format, string value is returned if False.
:raises: utils.Error
"""
introspection_data_manager = plugins_base.introspection_data_manager()
store = CONF.processing.store_data
ext = introspection_data_manager[store].obj
return ext.get(uuid, processed=processed, get_json=get_json)
def process(introspection_data):
"""Process data from the ramdisk.
This function heavily relies on the hooks to do the actual data processing.
"""
unprocessed_data = copy.deepcopy(introspection_data)
failures = []
_run_pre_hooks(introspection_data, failures)
node_info = _find_node_info(introspection_data, failures)
if node_info:
# Locking is already done in find_node() but may be not done in a
# node_not_found hook
node_info.acquire_lock()
if failures or node_info is None:
msg = _('The following failures happened during running '
'pre-processing hooks:\n%s') % '\n'.join(failures)
if node_info is not None:
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)
LOG.info('Matching node is %s', node_info.uuid,
node_info=node_info, data=introspection_data)
if node_info.finished_at is not None:
# race condition or introspection canceled
raise utils.Error(_('Node processing already finished with '
'error: %s') % node_info.error,
node_info=node_info, code=400)
# Note(mkovacik): store data now when we're sure that a background
# thread won't race with other process() or introspect.abort()
# call
utils.executor().submit(_store_unprocessed_data, node_info.uuid,
unprocessed_data)
try:
node = node_info.node()
except ir_utils.NotFound as exc:
with excutils.save_and_reraise_exception():
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(istate.Events.error, error=str(exc))
with excutils.save_and_reraise_exception():
_store_logs(introspection_data, node_info)
except Exception as exc:
LOG.exception('Unexpected exception during processing')
msg = _('Unexpected exception %(exc_class)s during processing: '
'%(error)s') % {'exc_class': exc.__class__.__name__,
'error': exc}
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)
if CONF.processing.always_store_ramdisk_logs:
_store_logs(introspection_data, node_info)
return result
def _run_post_hooks(node_info, introspection_data):
hooks = plugins_base.processing_hooks_manager()
for hook_ext in hooks:
LOG.debug('Running post-processing hook %s', hook_ext.name,
node_info=node_info, data=introspection_data)
hook_ext.obj.before_update(introspection_data, node_info)
@node_cache.fsm_transition(istate.Events.process, reentrant=False)
def _process_node(node_info, node, introspection_data):
# NOTE(dtantsur): repeat the check in case something changed
keep_power_on = ir_utils.check_provision_state(node)
_run_post_hooks(node_info, introspection_data)
store_introspection_data(node_info.uuid, introspection_data)
ironic = ir_utils.get_client()
pxe_filter.driver().sync(ironic)
node_info.invalidate_cache()
rules.apply(node_info, introspection_data)
resp = {'uuid': node.id}
# determine how to handle power
if keep_power_on or not node_info.manage_boot:
power_action = False
else:
power_action = CONF.processing.power_off
utils.executor().submit(_finish, node_info, ironic, introspection_data,
power_off=power_action)
return resp
@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)
try:
ironic.set_node_power_state(node_info.uuid, 'power off')
except Exception as exc:
if node_info.node().provision_state == 'enroll':
LOG.info("Failed to power off the node in"
"'enroll' state, ignoring; error was "
"%s", exc, node_info=node_info,
data=introspection_data)
else:
msg = (_('Failed to power off node %(node)s, check '
'its power management configuration: '
'%(exc)s') % {'node': node_info.uuid, 'exc':
exc})
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(istate.Events.finish)
LOG.info('Introspection finished successfully',
node_info=node_info, data=introspection_data)
def reapply(node_uuid, data=None):
"""Re-apply introspection steps.
Re-apply preprocessing, postprocessing and introspection rules on
stored data.
:param node_uuid: node UUID
:param data: unprocessed introspection data to be reapplied
:raises: utils.Error
"""
LOG.debug('Processing re-apply introspection request for node '
'UUID: %s', node_uuid)
node_info = node_cache.get_node(node_uuid)
if not node_info.acquire_lock(blocking=False):
# Note (mkovacik): it should be sufficient to check data
# presence & locking. If either introspection didn't start
# yet, was in waiting state or didn't finish yet, either data
# won't be available or locking would fail
raise utils.Error(_('Node locked, please, try again later'),
node_info=node_info, code=409)
utils.executor().submit(_reapply, node_info, introspection_data=data)
def _reapply(node_info, introspection_data=None):
# runs in background
node_info.started_at = timeutils.utcnow()
node_info.commit()
try:
ironic = ir_utils.get_client()
except Exception as exc:
msg = _('Encountered an exception while getting the Ironic client: '
'%s') % exc
LOG.error(msg, node_info=node_info, data=introspection_data)
node_info.finished(istate.Events.error, error=msg)
return
try:
_reapply_with_data(node_info, introspection_data)
except Exception as exc:
msg = (_('Failed reapply for node %(node)s, Error: '
'%(exc)s') % {'node': node_info.uuid, 'exc': exc})
LOG.error(msg, node_info=node_info, data=introspection_data)
return
_finish(node_info, ironic, introspection_data,
power_off=False)
LOG.info('Successfully reapplied introspection on stored '
'data', node_info=node_info, data=introspection_data)
@node_cache.fsm_event_before(istate.Events.reapply)
@node_cache.triggers_fsm_error_transition()
def _reapply_with_data(node_info, introspection_data):
failures = []
_run_pre_hooks(introspection_data, failures)
if failures:
raise utils.Error(_('Pre-processing failures detected reapplying '
'introspection on stored data:\n%s') %
'\n'.join(failures), node_info=node_info)
_run_post_hooks(node_info, introspection_data)
store_introspection_data(node_info.uuid, introspection_data)
node_info.invalidate_cache()
rules.apply(node_info, introspection_data)