/usr/lib/python3/dist-packages/os_win/utils/jobutils.py is in python3-os-win 3.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
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#
# 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.
"""
Base Utility class for operations on Hyper-V.
"""
import time
from oslo_log import log as logging
from os_win import _utils
from os_win import constants
from os_win import exceptions
from os_win.utils import baseutils
LOG = logging.getLogger(__name__)
class JobUtils(baseutils.BaseUtilsVirt):
_CONCRETE_JOB_CLASS = "Msvm_ConcreteJob"
_DEFAULT_JOB_TERMINATE_TIMEOUT = 15 # seconds
_KILL_JOB_STATE_CHANGE_REQUEST = 5
_completed_job_states = [constants.JOB_STATE_COMPLETED,
constants.JOB_STATE_TERMINATED,
constants.JOB_STATE_KILLED,
constants.JOB_STATE_COMPLETED_WITH_WARNINGS,
constants.JOB_STATE_EXCEPTION]
_successful_job_states = [constants.JOB_STATE_COMPLETED,
constants.JOB_STATE_COMPLETED_WITH_WARNINGS]
def check_ret_val(self, ret_val, job_path, success_values=[0]):
"""Checks that the job represented by the given arguments succeeded.
Some Hyper-V operations are not atomic, and will return a reference
to a job. In this case, this method will wait for the job's
completion.
:param ret_val: integer, representing the return value of the job.
if the value is WMI_JOB_STATUS_STARTED or WMI_JOB_STATE_RUNNING,
a job_path cannot be None.
:param job_path: string representing the WMI object path of a
Hyper-V job.
:param success_values: list of return values that can be considered
successful. WMI_JOB_STATUS_STARTED and WMI_JOB_STATE_RUNNING
values are ignored.
:raises exceptions.WMIJobFailed: if the given ret_val is
WMI_JOB_STATUS_STARTED or WMI_JOB_STATE_RUNNING and the state of
job represented by the given job_path is not
WMI_JOB_STATE_COMPLETED or JOB_STATE_COMPLETED_WITH_WARNINGS, or
if the given ret_val is not in the list of given success_values.
"""
if ret_val in [constants.WMI_JOB_STATUS_STARTED,
constants.WMI_JOB_STATE_RUNNING]:
return self._wait_for_job(job_path)
elif ret_val not in success_values:
raise exceptions.WMIJobFailed(error_code=ret_val,
job_state=None,
error_summ_desc=None,
error_desc=None)
def _wait_for_job(self, job_path):
"""Poll WMI job state and wait for completion."""
job_wmi_path = job_path.replace('\\', '/')
job = self._get_wmi_obj(job_wmi_path)
while not self._is_job_completed(job):
time.sleep(0.1)
job = self._get_wmi_obj(job_wmi_path)
job_state = job.JobState
err_code = job.ErrorCode
# We'll raise an exception for killed jobs.
job_failed = job_state not in self._successful_job_states or err_code
if job_failed:
err_sum_desc = getattr(job, 'ErrorSummaryDescription', None)
err_desc = job.ErrorDescription
raise exceptions.WMIJobFailed(job_state=job_state,
error_code=err_code,
error_summ_desc=err_sum_desc,
error_desc=err_desc)
if job_state == constants.JOB_STATE_COMPLETED_WITH_WARNINGS:
LOG.warning("WMI job completed with warnings. For detailed "
"information, please check the Windows event logs.")
desc = job.Description
elap = job.ElapsedTime
LOG.debug("WMI job succeeded: %(desc)s, Elapsed=%(elap)s",
{'desc': desc, 'elap': elap})
return job
def _get_pending_jobs_affecting_element(self, element):
# Msvm_AffectedJobElement is in fact an association between
# the affected element and the affecting job.
mappings = self._conn.Msvm_AffectedJobElement(
AffectedElement=element.path_())
pending_jobs = []
for mapping in mappings:
try:
if mapping.AffectingElement and not self._is_job_completed(
mapping.AffectingElement):
pending_jobs.append(mapping.AffectingElement)
except exceptions.x_wmi as ex:
# NOTE(claudiub): we can ignore "Not found" type exceptions.
if not _utils._is_not_found_exc(ex):
raise
return pending_jobs
def _stop_jobs(self, element):
pending_jobs = self._get_pending_jobs_affecting_element(element)
for job in pending_jobs:
try:
if not job.Cancellable:
LOG.debug("Got request to terminate "
"non-cancelable job.")
continue
job.RequestStateChange(
self._KILL_JOB_STATE_CHANGE_REQUEST)
except exceptions.x_wmi as ex:
# The job may had been completed right before we've
# attempted to kill it.
if not _utils._is_not_found_exc(ex):
LOG.debug("Failed to stop job. Exception: %s", ex)
pending_jobs = self._get_pending_jobs_affecting_element(element)
if pending_jobs:
LOG.debug("Attempted to terminate jobs "
"affecting element %(element)s but "
"%(pending_count)s jobs are still pending.",
dict(element=element,
pending_count=len(pending_jobs)))
raise exceptions.JobTerminateFailed()
def _is_job_completed(self, job):
return job.JobState in self._completed_job_states
def stop_jobs(self, element, timeout=_DEFAULT_JOB_TERMINATE_TIMEOUT):
"""Stops the Hyper-V jobs associated with the given resource.
:param element: string representing the path of the Hyper-V resource
whose jobs will be stopped.
:param timeout: the maximum amount of time allowed to stop all the
given resource's jobs.
:raises exceptions.JobTerminateFailed: if there are still pending jobs
associated with the given resource and the given timeout amount of
time has passed.
"""
@_utils.retry_decorator(exceptions=exceptions.JobTerminateFailed,
timeout=timeout, max_retry_count=None)
def _stop_jobs_with_timeout():
self._stop_jobs(element)
_stop_jobs_with_timeout()
@_utils.not_found_decorator()
@_utils.retry_decorator(exceptions=exceptions.HyperVException)
def add_virt_resource(self, virt_resource, parent):
(job_path, new_resources,
ret_val) = self._vs_man_svc.AddResourceSettings(
parent.path_(), [virt_resource.GetText_(1)])
self.check_ret_val(ret_val, job_path)
return new_resources
# modify_virt_resource can fail, especially while setting up the VM's
# serial port connection. Retrying the operation will yield success.
@_utils.not_found_decorator()
@_utils.retry_decorator(exceptions=exceptions.HyperVException)
def modify_virt_resource(self, virt_resource):
(job_path, out_set_data,
ret_val) = self._vs_man_svc.ModifyResourceSettings(
ResourceSettings=[virt_resource.GetText_(1)])
self.check_ret_val(ret_val, job_path)
def remove_virt_resource(self, virt_resource):
self.remove_multiple_virt_resources([virt_resource])
@_utils.not_found_decorator()
@_utils.retry_decorator(exceptions=exceptions.HyperVException)
def remove_multiple_virt_resources(self, virt_resources):
(job, ret_val) = self._vs_man_svc.RemoveResourceSettings(
ResourceSettings=[r.path_() for r in virt_resources])
self.check_ret_val(ret_val, job)
def add_virt_feature(self, virt_feature, parent):
self.add_multiple_virt_features([virt_feature], parent)
@_utils.not_found_decorator()
@_utils.retry_decorator(exceptions=exceptions.HyperVException)
def add_multiple_virt_features(self, virt_features, parent):
(job_path, out_set_data,
ret_val) = self._vs_man_svc.AddFeatureSettings(
parent.path_(), [f.GetText_(1) for f in virt_features])
self.check_ret_val(ret_val, job_path)
@_utils.not_found_decorator()
@_utils.retry_decorator(exceptions=exceptions.HyperVException)
def modify_virt_feature(self, virt_feature):
(job_path, out_set_data,
ret_val) = self._vs_man_svc.ModifyFeatureSettings(
FeatureSettings=[virt_feature.GetText_(1)])
self.check_ret_val(ret_val, job_path)
def remove_virt_feature(self, virt_feature):
self.remove_multiple_virt_features([virt_feature])
@_utils.not_found_decorator()
def remove_multiple_virt_features(self, virt_features):
(job_path, ret_val) = self._vs_man_svc.RemoveFeatureSettings(
FeatureSettings=[f.path_() for f in virt_features])
self.check_ret_val(ret_val, job_path)
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