420 lines
18 KiB
Python
420 lines
18 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Functionality related to cleaning."""
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from oslo_log import log
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from ironic.common import exception
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from ironic.common.i18n import _
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from ironic.common import states
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from ironic.conductor import steps as conductor_steps
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from ironic.conductor import task_manager
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from ironic.conductor import utils
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from ironic.conf import CONF
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from ironic.drivers import utils as driver_utils
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from ironic import objects
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LOG = log.getLogger(__name__)
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@task_manager.require_exclusive_lock
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def do_node_clean(task, clean_steps=None, disable_ramdisk=False):
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"""Internal RPC method to perform cleaning of a node.
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:param task: a TaskManager instance with an exclusive lock on its node
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:param clean_steps: For a manual clean, the list of clean steps to
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perform. Is None For automated cleaning (default).
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For more information, see the clean_steps parameter
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of :func:`ConductorManager.do_node_clean`.
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:param disable_ramdisk: Whether to skip booting ramdisk for cleaning.
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"""
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node = task.node
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manual_clean = clean_steps is not None
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clean_type = 'manual' if manual_clean else 'automated'
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LOG.debug('Starting %(type)s cleaning for node %(node)s',
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{'type': clean_type, 'node': node.uuid})
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if not manual_clean and utils.skip_automated_cleaning(node):
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# Skip cleaning, move to AVAILABLE.
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node.clean_step = None
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node.save()
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task.process_event('done')
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how = ('API' if node.automated_clean is False else 'configuration')
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LOG.info('Automated cleaning is disabled via %(how)s, node %(node)s '
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'has been successfully moved to AVAILABLE state',
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{'how': how, 'node': node})
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return
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# NOTE(dtantsur): this is only reachable during automated cleaning,
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# for manual cleaning we verify maintenance mode earlier on.
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if (not CONF.conductor.allow_provisioning_in_maintenance
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and node.maintenance):
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msg = _('Cleaning a node in maintenance mode is not allowed')
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return utils.cleaning_error_handler(task, msg,
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tear_down_cleaning=False)
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try:
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# NOTE(ghe): Valid power and network values are needed to perform
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# a cleaning.
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task.driver.power.validate(task)
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if not disable_ramdisk:
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task.driver.network.validate(task)
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except (exception.InvalidParameterValue, exception.NetworkError) as e:
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msg = (_('Validation of node %(node)s for cleaning failed: %(msg)s') %
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{'node': node.uuid, 'msg': e})
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return utils.cleaning_error_handler(task, msg)
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utils.wipe_cleaning_internal_info(task)
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if manual_clean:
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node.set_driver_internal_info('clean_steps', clean_steps)
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node.set_driver_internal_info('cleaning_disable_ramdisk',
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disable_ramdisk)
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task.node.save()
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utils.node_update_cache(task)
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# Allow the deploy driver to set up the ramdisk again (necessary for
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# IPA cleaning)
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try:
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if not disable_ramdisk:
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prepare_result = task.driver.deploy.prepare_cleaning(task)
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else:
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LOG.info('Skipping preparing for in-band cleaning since '
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'out-of-band only cleaning has been requested for node '
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'%s', node.uuid)
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prepare_result = None
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except Exception as e:
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msg = (_('Failed to prepare node %(node)s for cleaning: %(e)s')
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% {'node': node.uuid, 'e': e})
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return utils.cleaning_error_handler(task, msg, traceback=True)
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if prepare_result == states.CLEANWAIT:
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# Prepare is asynchronous, the deploy driver will need to
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# set node.driver_internal_info['clean_steps'] and
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# node.clean_step and then make an RPC call to
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# continue_node_clean to start cleaning.
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# For manual cleaning, the target provision state is MANAGEABLE,
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# whereas for automated cleaning, it is AVAILABLE (the default).
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target_state = states.MANAGEABLE if manual_clean else None
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task.process_event('wait', target_state=target_state)
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return
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try:
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conductor_steps.set_node_cleaning_steps(
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task, disable_ramdisk=disable_ramdisk)
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except Exception as e:
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# Catch all exceptions and follow the error handling
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# path so things are cleaned up properly.
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msg = (_('Cannot clean node %(node)s: %(msg)s')
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% {'node': node.uuid, 'msg': e})
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return utils.cleaning_error_handler(task, msg)
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steps = node.driver_internal_info.get('clean_steps', [])
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step_index = 0 if steps else None
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do_next_clean_step(task, step_index, disable_ramdisk=disable_ramdisk)
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@utils.fail_on_error(utils.cleaning_error_handler,
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_("Unexpected error when processing next clean step"),
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traceback=True)
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@task_manager.require_exclusive_lock
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def do_next_clean_step(task, step_index, disable_ramdisk=None):
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"""Do cleaning, starting from the specified clean step.
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:param task: a TaskManager instance with an exclusive lock
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:param step_index: The first clean step in the list to execute. This
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is the index (from 0) into the list of clean steps in the node's
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driver_internal_info['clean_steps']. Is None if there are no steps
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to execute.
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:param disable_ramdisk: Whether to skip booting ramdisk for cleaning.
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"""
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node = task.node
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# For manual cleaning, the target provision state is MANAGEABLE,
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# whereas for automated cleaning, it is AVAILABLE.
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manual_clean = node.target_provision_state == states.MANAGEABLE
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if step_index is None:
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steps = []
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else:
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assert node.driver_internal_info.get('clean_steps') is not None, \
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f"BUG: No clean steps for {node.uuid}, step index is {step_index}"
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steps = node.driver_internal_info['clean_steps'][step_index:]
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if disable_ramdisk is None:
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disable_ramdisk = node.driver_internal_info.get(
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'cleaning_disable_ramdisk', False)
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LOG.info('Executing %(kind)s cleaning on node %(node)s, remaining steps: '
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'%(steps)s', {'node': node.uuid, 'steps': steps,
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'kind': 'manual' if manual_clean else 'automated'})
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# Execute each step until we hit an async step or run out of steps
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for ind, step in enumerate(steps):
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# Save which step we're about to start so we can restart
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# if necessary
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node.clean_step = step
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node.set_driver_internal_info('clean_step_index', step_index + ind)
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node.save()
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eocn = step.get('execute_on_child_nodes', False)
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result = None
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try:
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if not eocn:
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LOG.info('Executing %(step)s on node %(node)s',
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{'step': step, 'node': node.uuid})
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use_step_handler = conductor_steps.use_reserved_step_handler(
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task, step)
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if use_step_handler:
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if use_step_handler == conductor_steps.EXIT_STEPS:
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# Exit the step, i.e. hold step
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return
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# if use_step_handler == conductor_steps.USED_HANDLER
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# Then we have completed the needful in the handler,
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# but since there is no other value to check now,
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# we know we just need to skip execute_deploy_step
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else:
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interface = getattr(task.driver, step.get('interface'))
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result = interface.execute_clean_step(task, step)
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else:
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LOG.info('Executing %(step)s on child nodes for node '
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'%(node)s.',
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{'step': step, 'node': node.uuid})
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result = execute_step_on_child_nodes(task, step)
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except Exception as e:
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if isinstance(e, exception.AgentConnectionFailed):
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if task.node.driver_internal_info.get('cleaning_reboot'):
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LOG.info('Agent is not yet running on node %(node)s '
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'after cleaning reboot, waiting for agent to '
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'come up to run next clean step %(step)s.',
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{'node': node.uuid, 'step': step})
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node.set_driver_internal_info('skip_current_clean_step',
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False)
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target_state = (states.MANAGEABLE if manual_clean
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else None)
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task.process_event('wait', target_state=target_state)
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return
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if isinstance(e, exception.AgentInProgress):
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LOG.info('Conductor attempted to process clean step for '
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'node %(node)s. Agent indicated it is presently '
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'executing a command. Error: %(error)s',
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{'node': task.node.uuid,
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'error': e})
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node.set_driver_internal_info('skip_current_clean_step', False)
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target_state = states.MANAGEABLE if manual_clean else None
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task.process_event('wait', target_state=target_state)
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return
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msg = (_('Node %(node)s failed step %(step)s: '
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'%(exc)s') %
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{'node': node.uuid, 'exc': e,
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'step': node.clean_step})
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if not disable_ramdisk:
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driver_utils.collect_ramdisk_logs(task.node, label='cleaning')
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utils.cleaning_error_handler(task, msg, traceback=True)
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return
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# Check if the step is done or not. The step should return
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# states.CLEANWAIT if the step is still being executed, or
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# None if the step is done.
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if result == states.CLEANWAIT:
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# Kill this worker, the async step will make an RPC call to
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# continue_node_clean to continue cleaning
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LOG.info('Clean step %(step)s on node %(node)s being '
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'executed asynchronously, waiting for driver.',
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{'node': node.uuid, 'step': step})
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target_state = states.MANAGEABLE if manual_clean else None
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task.process_event('wait', target_state=target_state)
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return
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elif result is not None:
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# NOTE(TheJulia): If your here debugging a step which fails,
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# part of the constraint is that a value *cannot* be returned.
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# to the runner. The step has to either succeed and return
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# None, or raise an exception.
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msg = (_('While executing step %(step)s on node '
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'%(node)s, step returned invalid value: %(val)s')
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% {'step': step, 'node': node.uuid, 'val': result})
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return utils.cleaning_error_handler(task, msg)
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LOG.info('Node %(node)s finished clean step %(step)s',
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{'node': node.uuid, 'step': step})
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if CONF.agent.deploy_logs_collect == 'always' and not disable_ramdisk:
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driver_utils.collect_ramdisk_logs(task.node, label='cleaning')
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# Clear clean_step
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node.clean_step = None
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utils.wipe_cleaning_internal_info(task)
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node.save()
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if not disable_ramdisk:
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try:
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task.driver.deploy.tear_down_cleaning(task)
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except Exception as e:
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msg = (_('Failed to tear down from cleaning for node %(node)s, '
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'reason: %(err)s')
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% {'node': node.uuid, 'err': e})
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return utils.cleaning_error_handler(task, msg,
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traceback=True,
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tear_down_cleaning=False)
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LOG.info('Node %s cleaning complete', node.uuid)
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event = 'manage' if manual_clean or node.retired else 'done'
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# NOTE(rloo): No need to specify target prov. state; we're done
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task.process_event(event)
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def execute_step_on_child_nodes(task, step):
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"""Execute a requested step against a child node.
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:param task: The TaskManager object for the parent node.
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:param step: The requested step to be executed.
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:returns: None on Success, the resulting error message if a
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failure has occurred.
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"""
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# NOTE(TheJulia): We could just use nodeinfo list calls against
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# dbapi.
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# NOTE(TheJulia): We validate the data in advance in the API
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# with the original request context.
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eocn = step.get('execute_on_child_nodes')
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child_nodes = step.get('limit_child_node_execution', [])
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filters = {'parent_node': task.node.uuid}
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if eocn and len(child_nodes) >= 1:
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filters['uuid_in'] = child_nodes
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child_nodes = objects.Node.list(
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task.context,
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filters=filters,
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fields=['uuid']
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)
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for child_node in child_nodes:
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result = None
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LOG.info('Executing step %(step)s on child node %(node)s for parent '
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'node %(parent_node)s',
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{'step': step,
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'node': child_node.uuid,
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'parent_node': task.node.uuid})
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with task_manager.acquire(task.context,
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child_node.uuid,
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purpose='execute step') as child_task:
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interface = getattr(child_task.driver, step.get('interface'))
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LOG.info('Executing %(step)s on node %(node)s',
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{'step': step, 'node': child_task.node.uuid})
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if not conductor_steps.use_reserved_step_handler(child_task, step):
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result = interface.execute_clean_step(child_task, step)
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if result is not None:
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if (result == states.CLEANWAIT
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and CONF.conductor.permit_child_node_step_async_result):
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# Operator has chosen to permit this due to some reason
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# NOTE(TheJulia): This is where we would likely wire agent
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# error handling if we ever implicitly allowed child node
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# deploys to take place with the agent from a parent node
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# being deployed.
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continue
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msg = (_('While executing step %(step)s on child node '
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'%(node)s, step returned invalid value: %(val)s')
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% {'step': step, 'node': child_task.node.uuid,
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'val': result})
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LOG.error(msg)
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# Only None or states.CLEANWAIT are possible paths forward
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# in the parent step execution code, so returning the message
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# means it will be logged.
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return msg
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def get_last_error(node):
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last_error = _('By request, the clean operation was aborted')
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if node.clean_step:
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last_error += (
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_(' during or after the completion of step "%s"')
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% conductor_steps.step_id(node.clean_step)
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)
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return last_error
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@task_manager.require_exclusive_lock
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def do_node_clean_abort(task):
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"""Internal method to abort an ongoing operation.
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:param task: a TaskManager instance with an exclusive lock
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"""
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node = task.node
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try:
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task.driver.deploy.tear_down_cleaning(task)
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except Exception as e:
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log_msg = (_('Failed to tear down cleaning for node %(node)s '
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'after aborting the operation. Error: %(err)s') %
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{'node': node.uuid, 'err': e})
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error_msg = _('Failed to tear down cleaning after aborting '
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'the operation')
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utils.cleaning_error_handler(task, log_msg,
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errmsg=error_msg,
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traceback=True,
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tear_down_cleaning=False,
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set_fail_state=False)
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return
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last_error = get_last_error(node)
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info_message = _('Clean operation aborted for node %s') % node.uuid
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if node.clean_step:
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info_message += (
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_(' during or after the completion of step "%s"')
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% node.clean_step
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)
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node.last_error = last_error
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node.clean_step = None
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utils.wipe_cleaning_internal_info(task)
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node.save()
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LOG.info(info_message)
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@utils.fail_on_error(utils.cleaning_error_handler,
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_("Unexpected error when processing next clean step"),
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traceback=True)
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@task_manager.require_exclusive_lock
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def continue_node_clean(task):
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"""Continue cleaning after finishing an async clean step.
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This function calculates which step has to run next and passes control
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into do_next_clean_step.
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:param task: a TaskManager instance with an exclusive lock
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"""
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node = task.node
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next_step_index = utils.update_next_step_index(task, 'clean')
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# If this isn't the final clean step in the cleaning operation
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# and it is flagged to abort after the clean step that just
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# finished, we abort the cleaning operation.
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if node.clean_step.get('abort_after'):
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step_name = node.clean_step['step']
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if next_step_index is not None:
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LOG.debug('The cleaning operation for node %(node)s was '
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'marked to be aborted after step "%(step)s '
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'completed. Aborting now that it has completed.',
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{'node': task.node.uuid, 'step': step_name})
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if node.target_provision_state == states.MANAGEABLE:
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target_state = states.MANAGEABLE
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else:
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target_state = None
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task.process_event('fail', target_state=target_state)
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do_node_clean_abort(task)
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return
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LOG.debug('The cleaning operation for node %(node)s was '
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'marked to be aborted after step "%(step)s" '
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'completed. However, since there are no more '
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'clean steps after this, the abort is not going '
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'to be done.', {'node': node.uuid,
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'step': step_name})
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do_next_clean_step(task, next_step_index)
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