/usr/lib/python2.7/dist-packages/os_faults/api/power_management.py is in python-os-faults 0.1.17-0ubuntu1.1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | # 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 abc
import six
from os_faults.api import base_driver
from os_faults.api import error
from os_faults import utils
@six.add_metaclass(abc.ABCMeta)
class PowerDriver(base_driver.BaseDriver):
@abc.abstractmethod
def supports(host):
"""Returns True if host is supported by the power driver"""
@abc.abstractmethod
def poweroff(self, host):
"""Power off host abruptly"""
@abc.abstractmethod
def poweron(self, host):
"""Power on host"""
@abc.abstractmethod
def reset(self, host):
"""Reset host"""
@abc.abstractmethod
def shutdown(self, host):
"""Graceful shutdown host"""
def snapshot(self, host, snapshot_name, suspend=True):
raise NotImplementedError
def revert(self, host, snapshot_name, resume=True):
raise NotImplementedError
class PowerManager(object):
def __init__(self):
self.power_drivers = []
def add_driver(self, driver):
self.power_drivers.append(driver)
def _map_hosts_to_driver(self, hosts):
driver_host_pairs = []
for host in hosts:
for power_driver in self.power_drivers:
if power_driver.supports(host):
driver_host_pairs.append((power_driver, host))
break
else:
raise error.PowerManagementError(
"No supported driver found for host {}".format(host))
return driver_host_pairs
def _run_command(self, cmd, hosts, **kwargs):
driver_host_pairs = self._map_hosts_to_driver(hosts)
tw = utils.ThreadsWrapper()
for driver, host in driver_host_pairs:
kwargs['host'] = host
fn = getattr(driver, cmd)
tw.start_thread(fn, **kwargs)
tw.join_threads()
if tw.errors:
raise error.PowerManagementError(
'There are some errors when working the driver. '
'Please, check logs for more details.')
def poweroff(self, hosts):
self._run_command('poweroff', hosts)
def poweron(self, hosts):
self._run_command('poweron', hosts)
def reset(self, hosts):
self._run_command('reset', hosts)
def shutdown(self, hosts):
self._run_command('shutdown', hosts)
def snapshot(self, hosts, snapshot_name, suspend=True):
self._run_command('snapshot', hosts,
snapshot_name=snapshot_name, suspend=suspend)
def revert(self, hosts, snapshot_name, resume=True):
self._run_command('revert', hosts,
snapshot_name=snapshot_name, resume=resume)
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