Hardware introspection daemon for OpenStack Ironic
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ironic-inspector/ironic_inspector/process.py

405 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 base64
import copy
import datetime
import os
import eventlet
import json
from oslo_config import cfg
from oslo_utils import excutils
from ironic_inspector.common.i18n import _, _LE, _LI, _LW
from ironic_inspector.common import ironic as ir_utils
from ironic_inspector.common import swift
from ironic_inspector import firewall
from ironic_inspector import node_cache
from ironic_inspector.plugins import base as plugins_base
from ironic_inspector import rules
from ironic_inspector import utils
CONF = cfg.CONF
LOG = utils.getProcessingLogger(__name__)
_CREDENTIALS_WAIT_RETRIES = 10
_CREDENTIALS_WAIT_PERIOD = 3
_STORAGE_EXCLUDED_KEYS = {'logs'}
_UNPROCESSED_DATA_STORE_SUFFIX = 'UNPROCESSED'
_DATETIME_FORMAT = '%Y.%m.%d_%H.%M.%S_%f'
def _store_logs(introspection_data, node_info):
logs = introspection_data.get('logs')
if not logs:
LOG.warning(_LW('No logs were passed by the ramdisk'),
data=introspection_data, node_info=node_info)
return
if not CONF.processing.ramdisk_logs_dir:
LOG.warning(_LW('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
time_fmt = datetime.datetime.utcnow().strftime(_DATETIME_FORMAT)
bmc_address = (utils.get_ipmi_address_from_data(introspection_data)
or 'unknown')
file_name = 'bmc_%s_%s' % (bmc_address, time_fmt)
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.b64decode(logs))
except EnvironmentError:
LOG.exception(_LE('Could not store the ramdisk logs'),
data=introspection_data, node_info=node_info)
else:
LOG.info(_LI('Ramdisk logs were stored in file %s'), file_name,
data=introspection_data, node_info=node_info)
def _find_node_info(introspection_data, failures):
try:
return node_cache.find_node(
bmc_address=introspection_data.get('ipmi_address'),
mac=utils.get_valid_macs(introspection_data))
except utils.NotFoundInCacheError as exc:
not_found_hook = plugins_base.node_not_found_hook_manager()
if not_found_hook is None:
failures.append(_('Look up error: %s') % exc)
return
# 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:
# 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(_LE('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(_LE('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_data(node_info, data, suffix=None):
if CONF.processing.store_data != 'swift':
LOG.debug("Swift support is disabled, introspection data "
"won't be stored", node_info=node_info)
return
swift_object_name = swift.store_introspection_data(
_filter_data_excluded_keys(data),
node_info.uuid,
suffix=suffix
)
LOG.info(_LI('Introspection data was stored in Swift in object '
'%s'), swift_object_name, node_info=node_info)
if CONF.processing.store_data_location:
node_info.patch([{'op': 'add', 'path': '/extra/%s' %
CONF.processing.store_data_location,
'value': swift_object_name}])
def _store_unprocessed_data(node_info, data):
# runs in background
try:
_store_data(node_info, data,
suffix=_UNPROCESSED_DATA_STORE_SUFFIX)
except Exception:
LOG.exception(_LE('Encountered exception saving unprocessed '
'introspection data'), node_info=node_info,
data=data)
def _get_unprocessed_data(uuid):
if CONF.processing.store_data == 'swift':
LOG.debug('Fetching unprocessed introspection data from '
'Swift for %s', uuid)
return json.loads(
swift.get_introspection_data(
uuid,
suffix=_UNPROCESSED_DATA_STORE_SUFFIX
)
)
else:
raise utils.Error(_('Swift support is disabled'), code=400)
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(error='\n'.join(failures))
_store_logs(introspection_data, node_info)
raise utils.Error(msg, node_info=node_info, data=introspection_data)
LOG.info(_LI('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,
unprocessed_data)
try:
node = node_info.node()
except ir_utils.NotFound as exc:
with excutils.save_and_reraise_exception():
node_info.finished(error=str(exc))
_store_logs(introspection_data, node_info)
try:
result = _process_node(node, introspection_data, node_info)
except utils.Error as exc:
node_info.finished(error=str(exc))
with excutils.save_and_reraise_exception():
_store_logs(introspection_data, node_info)
except Exception as exc:
LOG.exception(_LE('Unexpected exception during processing'))
msg = _('Unexpected exception %(exc_class)s during processing: '
'%(error)s') % {'exc_class': exc.__class__.__name__,
'error': exc}
node_info.finished(error=msg)
_store_logs(introspection_data, node_info)
raise utils.Error(msg, node_info=node_info, data=introspection_data)
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:
hook_ext.obj.before_update(introspection_data, node_info)
def _process_node(node, introspection_data, node_info):
# NOTE(dtantsur): repeat the check in case something changed
ir_utils.check_provision_state(node)
node_info.create_ports(introspection_data.get('macs') or ())
_run_post_hooks(node_info, introspection_data)
_store_data(node_info, introspection_data)
ironic = ir_utils.get_client()
firewall.update_filters(ironic)
node_info.invalidate_cache()
rules.apply(node_info, introspection_data)
resp = {'uuid': node.uuid}
if node_info.options.get('new_ipmi_credentials'):
new_username, new_password = (
node_info.options.get('new_ipmi_credentials'))
utils.executor().submit(_finish_set_ipmi_credentials,
ironic, node, node_info, introspection_data,
new_username, new_password)
resp['ipmi_setup_credentials'] = True
resp['ipmi_username'] = new_username
resp['ipmi_password'] = new_password
else:
utils.executor().submit(_finish, ironic, node_info, introspection_data)
return resp
def _finish_set_ipmi_credentials(ironic, node, node_info, introspection_data,
new_username, new_password):
patch = [{'op': 'add', 'path': '/driver_info/ipmi_username',
'value': new_username},
{'op': 'add', 'path': '/driver_info/ipmi_password',
'value': new_password}]
new_ipmi_address = utils.get_ipmi_address_from_data(introspection_data)
if not ir_utils.get_ipmi_address(node) and new_ipmi_address:
patch.append({'op': 'add', 'path': '/driver_info/ipmi_address',
'value': new_ipmi_address})
node_info.patch(patch)
for attempt in range(_CREDENTIALS_WAIT_RETRIES):
try:
# We use this call because it requires valid credentials.
# We don't care about boot device, obviously.
ironic.node.get_boot_device(node_info.uuid)
except Exception as exc:
LOG.info(_LI('Waiting for credentials update, attempt %(attempt)d '
'current error is %(exc)s') %
{'attempt': attempt, 'exc': exc},
node_info=node_info, data=introspection_data)
eventlet.greenthread.sleep(_CREDENTIALS_WAIT_PERIOD)
else:
_finish(ironic, node_info, introspection_data)
return
msg = (_('Failed to validate updated IPMI credentials for node '
'%s, node might require maintenance') % node_info.uuid)
node_info.finished(error=msg)
raise utils.Error(msg, node_info=node_info, data=introspection_data)
def _finish(ironic, node_info, introspection_data, power_off=True):
if power_off:
LOG.debug('Forcing power off of node %s', node_info.uuid)
try:
ironic.node.set_power_state(node_info.uuid, 'off')
except Exception as exc:
if node_info.node().provision_state == 'enroll':
LOG.info(_LI("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})
node_info.finished(error=msg)
raise utils.Error(msg, node_info=node_info,
data=introspection_data)
LOG.info(_LI('Node powered-off'), node_info=node_info,
data=introspection_data)
node_info.finished()
LOG.info(_LI('Introspection finished successfully'),
node_info=node_info, data=introspection_data)
def reapply(node_ident):
"""Re-apply introspection steps.
Re-apply preprocessing, postprocessing and introspection rules on
stored data.
:param node_ident: node UUID or name
:raises: utils.Error
"""
LOG.debug('Processing re-apply introspection request for node '
'UUID: %s', node_ident)
node_info = node_cache.get_node(node_ident, locked=False)
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)
def _reapply(node_info):
# runs in background
try:
introspection_data = _get_unprocessed_data(node_info.uuid)
except Exception:
LOG.exception(_LE('Encountered exception while fetching '
'stored introspection data'),
node_info=node_info)
node_info.release_lock()
return
failures = []
_run_pre_hooks(introspection_data, failures)
if failures:
LOG.error(_LE('Pre-processing failures detected reapplying '
'introspection on stored data:\n%s'),
'\n'.join(failures), node_info=node_info)
node_info.finished(error='\n'.join(failures))
return
try:
ironic = ir_utils.get_client()
node_info.create_ports(introspection_data.get('macs') or ())
_run_post_hooks(node_info, introspection_data)
_store_data(node_info, introspection_data)
node_info.invalidate_cache()
rules.apply(node_info, introspection_data)
_finish(ironic, node_info, introspection_data,
power_off=False)
except Exception as exc:
LOG.exception(_LE('Encountered exception reapplying '
'introspection on stored data'),
node_info=node_info,
data=introspection_data)
node_info.finished(error=str(exc))
else:
LOG.info(_LI('Successfully reapplied introspection on stored '
'data'), node_info=node_info, data=introspection_data)