# -*- coding: utf-8 -*-
#
# Copyright 2014 Rackspace, Inc.
# Copyright 2015 Red Hat, Inc.
# All Rights Reserved.
#
# 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.
import collections
from ironic_lib import metrics_utils
from oslo_log import log
from oslo_utils import strutils
from oslo_utils import timeutils
import retrying
from ironic.common import boot_devices
from ironic.common import exception
from ironic.common.i18n import _, _LE, _LI, _LW
from ironic.common import states
from ironic.conductor import rpcapi
from ironic.conductor import utils as manager_utils
from ironic.conf import CONF
from ironic.drivers.modules import agent_client
from ironic.drivers.modules import deploy_utils
from ironic.drivers import utils as driver_utils
LOG = log.getLogger(__name__)
METRICS = metrics_utils.get_metrics_logger(__name__)
# This contains a nested dictionary containing the post clean step
# hooks registered for each clean step of every interface.
# Every key of POST_CLEAN_STEP_HOOKS is an interface and its value
# is a dictionary. For this inner dictionary, the key is the name of
# the clean-step method in the interface, and the value is the post
# clean-step hook -- the function that is to be called after successful
# completion of the clean step.
#
# For example:
# POST_CLEAN_STEP_HOOKS =
# {
# 'raid': {'create_configuration': <post-create function>,
# 'delete_configuration': <post-delete function>}
# }
#
# It means that method '<post-create function>' is to be called after
# successfully completing the clean step 'create_configuration' of
# raid interface. '<post-delete function>' is to be called after
# completing 'delete_configuration' of raid interface.
POST_CLEAN_STEP_HOOKS = {}
VENDOR_PROPERTIES = {
'deploy_forces_oob_reboot': _(
'Whether Ironic should force a reboot of the Node via the out-of-band '
'channel after deployment is complete. Provides compatibility with '
'older deploy ramdisks. Defaults to False. Optional.')
}
def _get_client():
client = agent_client.AgentClient()
return client
@METRICS.timer('post_clean_step_hook')
def post_clean_step_hook(interface, step):
"""Decorator method for adding a post clean step hook.
This is a mechanism for adding a post clean step hook for a particular
clean step. The hook will get executed after the clean step gets executed
successfully. The hook is not invoked on failure of the clean step.
Any method to be made as a hook may be decorated with @post_clean_step_hook
mentioning the interface and step after which the hook should be executed.
A TaskManager instance and the object for the last completed command
(provided by agent) will be passed to the hook method. The return value of
this method will be ignored. Any exception raised by this method will be
treated as a failure of the clean step and the node will be moved to
CLEANFAIL state.
:param interface: name of the interface
:param step: The name of the step after which it should be executed.
:returns: A method which registers the given method as a post clean
step hook.
"""
def decorator(func):
POST_CLEAN_STEP_HOOKS.setdefault(interface, {})[step] = func
return func
return decorator
def _get_post_clean_step_hook(node):
"""Get post clean step hook for the currently executing clean step.
This method reads node.clean_step and returns the post clean
step hook for the currently executing clean step.
:param node: a node object
:returns: a method if there is a post clean step hook for this clean
step; None otherwise
"""
interface = node.clean_step.get('interface')
step = node.clean_step.get('step')
try:
return POST_CLEAN_STEP_HOOKS[interface][step]
except KeyError:
pass
def _cleaning_reboot(task):
"""Reboots a node out of band after a clean step that requires it.
If an agent clean step has 'reboot_requested': True, reboots the
node when the step is completed. Will put the node in CLEANFAIL
if the node cannot be rebooted.
:param task: a TaskManager instance
"""
try:
manager_utils.node_power_action(task, states.REBOOT)
except Exception as e:
msg = (_('Reboot requested by clean step %(step)s failed for '
'node %(node)s: %(err)s') %
{'step': task.node.clean_step,
'node': task.node.uuid,
'err': e})
LOG.error(msg)
# do not set cleaning_reboot if we didn't reboot
manager_utils.cleaning_error_handler(task, msg)
return
# Signify that we've rebooted
driver_internal_info = task.node.driver_internal_info
driver_internal_info['cleaning_reboot'] = True
task.node.driver_internal_info = driver_internal_info
task.node.save()
def _notify_conductor_resume_clean(task):
LOG.debug('Sending RPC to conductor to resume cleaning for node %s',
task.node.uuid)
uuid = task.node.uuid
rpc = rpcapi.ConductorAPI()
topic = rpc.get_topic_for(task.node)
# Need to release the lock to let the conductor take it
task.release_resources()
rpc.continue_node_clean(task.context, uuid, topic=topic)
def _get_completed_cleaning_command(task, commands):
"""Returns None or a completed cleaning command from the agent.
:param task: a TaskManager instance to act on.
:param commands: a set of command results from the agent, typically
fetched with agent_client.get_commands_status().
"""
if not commands:
return
last_command = commands[-1]
if last_command['command_name'] != 'execute_clean_step':
# catches race condition where execute_clean_step is still
# processing so the command hasn't started yet
LOG.debug('Expected agent last command to be "execute_clean_step" '
'for node %(node)s, instead got "%(command)s". Waiting '
'for next heartbeat.',
{'node': task.node.uuid,
'command': last_command['command_name']})
return
last_result = last_command.get('command_result') or {}
last_step = last_result.get('clean_step')
if last_command['command_status'] == 'RUNNING':
LOG.debug('Clean step still running for node %(node)s: %(step)s',
{'step': last_step, 'node': task.node.uuid})
return
elif (last_command['command_status'] == 'SUCCEEDED' and
last_step != task.node.clean_step):
# A previous clean_step was running, the new command has not yet
# started.
LOG.debug('Clean step not yet started for node %(node)s: %(step)s',
{'step': last_step, 'node': task.node.uuid})
return
else:
return last_command
@METRICS.timer('log_and_raise_deployment_error')
def log_and_raise_deployment_error(task, msg):
"""Helper method to log the error and raise exception."""
LOG.error(msg)
deploy_utils.set_failed_state(task, msg)
raise exception.InstanceDeployFailure(msg)
[docs]class AgentDeployMixin(object):
"""Mixin with deploy methods."""
def __init__(self):
self._client = _get_client()
[docs] def continue_deploy(self, task):
"""Continues the deployment of baremetal node.
This method continues the deployment of the baremetal node after
the ramdisk have been booted.
:param task: a TaskManager instance
"""
[docs] def deploy_has_started(self, task):
"""Check if the deployment has started already.
:returns: True if the deploy has started, False otherwise.
"""
[docs] def deploy_is_done(self, task):
"""Check if the deployment is already completed.
:returns: True if the deployment is completed. False otherwise
"""
[docs] def reboot_to_instance(self, task):
"""Method invoked after the deployment is completed.
:param task: a TaskManager instance
"""
@METRICS.timer('AgentDeployMixin._refresh_clean_steps')
def _refresh_clean_steps(self, task):
"""Refresh the node's cached clean steps from the booted agent.
Gets the node's clean steps from the booted agent and caches them.
The steps are cached to make get_clean_steps() calls synchronous, and
should be refreshed as soon as the agent boots to start cleaning or
if cleaning is restarted because of a cleaning version mismatch.
:param task: a TaskManager instance
:raises: NodeCleaningFailure if the agent returns invalid results
"""
node = task.node
previous_steps = node.driver_internal_info.get(
'agent_cached_clean_steps')
LOG.debug('Refreshing agent clean step cache for node %(node)s. '
'Previously cached steps: %(steps)s',
{'node': node.uuid, 'steps': previous_steps})
agent_result = self._client.get_clean_steps(node, task.ports).get(
'command_result', {})
missing = set(['clean_steps', 'hardware_manager_version']).difference(
agent_result)
if missing:
raise exception.NodeCleaningFailure(_(
'agent get_clean_steps for node %(node)s returned an invalid '
'result. Keys: %(keys)s are missing from result: %(result)s.')
% ({'node': node.uuid, 'keys': missing,
'result': agent_result}))
# agent_result['clean_steps'] looks like
# {'HardwareManager': [{step1},{steps2}...], ...}
steps = collections.defaultdict(list)
for step_list in agent_result['clean_steps'].values():
for step in step_list:
missing = set(['interface', 'step', 'priority']).difference(
step)
if missing:
raise exception.NodeCleaningFailure(_(
'agent get_clean_steps for node %(node)s returned an '
'invalid clean step. Keys: %(keys)s are missing from '
'step: %(step)s.') % ({'node': node.uuid,
'keys': missing, 'step': step}))
steps[step['interface']].append(step)
# Save hardware manager version, steps, and date
info = node.driver_internal_info
info['hardware_manager_version'] = agent_result[
'hardware_manager_version']
info['agent_cached_clean_steps'] = dict(steps)
info['agent_cached_clean_steps_refreshed'] = str(timeutils.utcnow())
node.driver_internal_info = info
node.save()
LOG.debug('Refreshed agent clean step cache for node %(node)s: '
'%(steps)s', {'node': node.uuid, 'steps': steps})
@METRICS.timer('AgentDeployMixin.continue_cleaning')
[docs] def continue_cleaning(self, task, **kwargs):
"""Start the next cleaning step if the previous one is complete.
In order to avoid errors and make agent upgrades painless, the agent
compares the version of all hardware managers at the start of the
cleaning (the agent's get_clean_steps() call) and before executing
each clean step. If the version has changed between steps, the agent is
unable to tell if an ordering change will cause a cleaning issue so
it returns CLEAN_VERSION_MISMATCH. For automated cleaning, we restart
the entire cleaning cycle. For manual cleaning, we don't.
Additionally, if a clean_step includes the reboot_requested property
set to True, this method will coordinate the reboot once the step is
completed.
"""
node = task.node
# For manual clean, the target provision state is MANAGEABLE, whereas
# for automated cleaning, it is (the default) AVAILABLE.
manual_clean = node.target_provision_state == states.MANAGEABLE
agent_commands = self._client.get_commands_status(task.node)
if not agent_commands:
if task.node.driver_internal_info.get('cleaning_reboot'):
# Node finished a cleaning step that requested a reboot, and
# this is the first heartbeat after booting. Continue cleaning.
info = task.node.driver_internal_info
info.pop('cleaning_reboot', None)
task.node.driver_internal_info = info
_notify_conductor_resume_clean(task)
return
else:
# Agent has no commands whatsoever
return
command = _get_completed_cleaning_command(task, agent_commands)
LOG.debug('Cleaning command status for node %(node)s on step %(step)s:'
' %(command)s', {'node': node.uuid,
'step': node.clean_step,
'command': command})
if not command:
# Agent command in progress
return
if command.get('command_status') == 'FAILED':
msg = (_('Agent returned error for clean step %(step)s on node '
'%(node)s : %(err)s.') %
{'node': node.uuid,
'err': command.get('command_error'),
'step': node.clean_step})
LOG.error(msg)
return manager_utils.cleaning_error_handler(task, msg)
elif command.get('command_status') == 'CLEAN_VERSION_MISMATCH':
# Cache the new clean steps (and 'hardware_manager_version')
try:
self._refresh_clean_steps(task)
except exception.NodeCleaningFailure as e:
msg = (_('Could not continue cleaning on node '
'%(node)s: %(err)s.') %
{'node': node.uuid, 'err': e})
LOG.exception(msg)
return manager_utils.cleaning_error_handler(task, msg)
if manual_clean:
# Don't restart manual cleaning if agent reboots to a new
# version. Both are operator actions, unlike automated
# cleaning. Manual clean steps are not necessarily idempotent
# like automated clean steps and can be even longer running.
LOG.info(_LI('During manual cleaning, node %(node)s detected '
'a clean version mismatch. Re-executing and '
'continuing from current step %(step)s.'),
{'node': node.uuid, 'step': node.clean_step})
driver_internal_info = node.driver_internal_info
driver_internal_info['skip_current_clean_step'] = False
node.driver_internal_info = driver_internal_info
node.save()
else:
# Restart cleaning, agent must have rebooted to new version
LOG.info(_LI('During automated cleaning, node %s detected a '
'clean version mismatch. Resetting clean steps '
'and rebooting the node.'),
node.uuid)
try:
manager_utils.set_node_cleaning_steps(task)
except exception.NodeCleaningFailure:
msg = (_('Could not restart automated cleaning on node '
'%(node)s: %(err)s.') %
{'node': node.uuid,
'err': command.get('command_error'),
'step': node.clean_step})
LOG.exception(msg)
return manager_utils.cleaning_error_handler(task, msg)
_notify_conductor_resume_clean(task)
elif command.get('command_status') == 'SUCCEEDED':
clean_step_hook = _get_post_clean_step_hook(node)
if clean_step_hook is not None:
LOG.debug('For node %(node)s, executing post clean step '
'hook %(method)s for clean step %(step)s',
{'method': clean_step_hook.__name__,
'node': node.uuid,
'step': node.clean_step})
try:
clean_step_hook(task, command)
except Exception as e:
msg = (_('For node %(node)s, post clean step hook '
'%(method)s failed for clean step %(step)s.'
'Error: %(error)s') %
{'method': clean_step_hook.__name__,
'node': node.uuid,
'error': e,
'step': node.clean_step})
LOG.exception(msg)
return manager_utils.cleaning_error_handler(task, msg)
if task.node.clean_step.get('reboot_requested'):
_cleaning_reboot(task)
return
LOG.info(_LI('Agent on node %s returned cleaning command success, '
'moving to next clean step'), node.uuid)
_notify_conductor_resume_clean(task)
else:
msg = (_('Agent returned unknown status for clean step %(step)s '
'on node %(node)s : %(err)s.') %
{'node': node.uuid,
'err': command.get('command_status'),
'step': node.clean_step})
LOG.error(msg)
return manager_utils.cleaning_error_handler(task, msg)
@METRICS.timer('AgentDeployMixin.heartbeat')
[docs] def heartbeat(self, task, callback_url):
"""Process a heartbeat.
:param task: task to work with.
:param callback_url: agent HTTP API URL.
"""
# TODO(dtantsur): upgrade lock only if we actually take action other
# than updating the last timestamp.
task.upgrade_lock()
node = task.node
LOG.debug('Heartbeat from node %s', node.uuid)
driver_internal_info = node.driver_internal_info
driver_internal_info['agent_url'] = callback_url
# TODO(rloo): 'agent_last_heartbeat' was deprecated since it wasn't
# being used so remove that entry if it exists.
# Hopefully all nodes will have been updated by Pike, so
# we can delete this code then.
driver_internal_info.pop('agent_last_heartbeat', None)
node.driver_internal_info = driver_internal_info
node.save()
# Async call backs don't set error state on their own
# TODO(jimrollenhagen) improve error messages here
msg = _('Failed checking if deploy is done.')
try:
if node.maintenance:
# this shouldn't happen often, but skip the rest if it does.
LOG.debug('Heartbeat from node %(node)s in maintenance mode; '
'not taking any action.', {'node': node.uuid})
return
elif (node.provision_state == states.DEPLOYWAIT and
not self.deploy_has_started(task)):
msg = _('Node failed to deploy.')
self.continue_deploy(task)
elif (node.provision_state == states.DEPLOYWAIT and
self.deploy_is_done(task)):
msg = _('Node failed to move to active state.')
self.reboot_to_instance(task)
elif (node.provision_state == states.DEPLOYWAIT and
self.deploy_has_started(task)):
node.touch_provisioning()
elif node.provision_state == states.CLEANWAIT:
node.touch_provisioning()
try:
if not node.clean_step:
LOG.debug('Node %s just booted to start cleaning.',
node.uuid)
msg = _('Node failed to start the first cleaning '
'step.')
# First, cache the clean steps
self._refresh_clean_steps(task)
# Then set/verify node clean steps and start cleaning
manager_utils.set_node_cleaning_steps(task)
_notify_conductor_resume_clean(task)
else:
msg = _('Node failed to check cleaning progress.')
self.continue_cleaning(task)
except exception.NoFreeConductorWorker:
# waiting for the next heartbeat, node.last_error and
# logging message is filled already via conductor's hook
pass
except Exception as e:
err_info = {'node': node.uuid, 'msg': msg, 'e': e}
last_error = _('Asynchronous exception for node %(node)s: '
'%(msg)s Exception: %(e)s') % err_info
LOG.exception(last_error)
if node.provision_state in (states.CLEANING, states.CLEANWAIT):
manager_utils.cleaning_error_handler(task, last_error)
elif node.provision_state in (states.DEPLOYING, states.DEPLOYWAIT):
deploy_utils.set_failed_state(task, last_error)
@METRICS.timer('AgentDeployMixin.reboot_and_finish_deploy')
[docs] def reboot_and_finish_deploy(self, task):
"""Helper method to trigger reboot on the node and finish deploy.
This method initiates a reboot on the node. On success, it
marks the deploy as complete. On failure, it logs the error
and marks deploy as failure.
:param task: a TaskManager object containing the node
:raises: InstanceDeployFailure, if node reboot failed.
"""
wait = CONF.agent.post_deploy_get_power_state_retry_interval * 1000
attempts = CONF.agent.post_deploy_get_power_state_retries + 1
@retrying.retry(
stop_max_attempt_number=attempts,
retry_on_result=lambda state: state != states.POWER_OFF,
wait_fixed=wait
)
def _wait_until_powered_off(task):
return task.driver.power.get_power_state(task)
node = task.node
if CONF.agent.deploy_logs_collect == 'always':
driver_utils.collect_ramdisk_logs(node)
# Whether ironic should power off the node via out-of-band or
# in-band methods
oob_power_off = strutils.bool_from_string(
node.driver_info.get('deploy_forces_oob_reboot', False))
try:
if not oob_power_off:
try:
self._client.power_off(node)
_wait_until_powered_off(task)
except Exception as e:
LOG.warning(
_LW('Failed to soft power off node %(node_uuid)s '
'in at least %(timeout)d seconds. '
'Error: %(error)s'),
{'node_uuid': node.uuid,
'timeout': (wait * (attempts - 1)) / 1000,
'error': e})
manager_utils.node_power_action(task, states.POWER_OFF)
else:
# Flush the file system prior to hard rebooting the node
result = self._client.sync(node)
error = result.get('faultstring')
if error:
if 'Unknown command' in error:
error = _('The version of the IPA ramdisk used in '
'the deployment do not support the '
'command "sync"')
LOG.warning(_LW(
'Failed to flush the file system prior to hard '
'rebooting the node %(node)s. Error: %(error)s'),
{'node': node.uuid, 'error': error})
manager_utils.node_power_action(task, states.POWER_OFF)
task.driver.network.remove_provisioning_network(task)
task.driver.network.configure_tenant_networks(task)
manager_utils.node_power_action(task, states.POWER_ON)
except Exception as e:
msg = (_('Error rebooting node %(node)s after deploy. '
'Error: %(error)s') %
{'node': node.uuid, 'error': e})
log_and_raise_deployment_error(task, msg)
task.process_event('done')
LOG.info(_LI('Deployment to node %s done'), task.node.uuid)
@METRICS.timer('AgentDeployMixin.prepare_instance_to_boot')
[docs] def prepare_instance_to_boot(self, task, root_uuid, efi_sys_uuid):
"""Prepares instance to boot.
:param task: a TaskManager object containing the node
:param root_uuid: the UUID for root partition
:param efi_sys_uuid: the UUID for the efi partition
:raises: InvalidState if fails to prepare instance
"""
node = task.node
if deploy_utils.get_boot_option(node) == "local":
# Install the boot loader
self.configure_local_boot(
task, root_uuid=root_uuid,
efi_system_part_uuid=efi_sys_uuid)
try:
task.driver.boot.prepare_instance(task)
except Exception as e:
LOG.error(_LE('Deploy failed for instance %(instance)s. '
'Error: %(error)s'),
{'instance': node.instance_uuid, 'error': e})
msg = _('Failed to continue agent deployment.')
log_and_raise_deployment_error(task, msg)
@METRICS.timer('AgentDeployMixin.configure_local_boot')