1c1281bad8
Reverting libvirt snapshot without destroying domain can cause next KVM issue: ioctl(KVM_CREATE_VM) failed: 16 Device or resource busy failed to initialize KVM: Device or resource busy Change-Id: I05b0f3fa7695970567d201dcc6a99a047c853a92
136 lines
5.1 KiB
Python
136 lines
5.1 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from os_faults.api import error
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from os_faults.api import power_management
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from os_faults import utils
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LOG = logging.getLogger(__name__)
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class LibvirtDriver(power_management.PowerManagement):
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NAME = 'libvirt'
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DESCRIPTION = 'Libvirt power management driver'
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CONFIG_SCHEMA = {
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'type': 'object',
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'$schema': 'http://json-schema.org/draft-04/schema#',
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'properties': {
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'connection_uri': {'type': 'string'},
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},
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'required': ['connection_uri'],
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'additionalProperties': False,
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}
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def __init__(self, params):
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self.connection_uri = params['connection_uri']
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self._cached_conn = None
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@property
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def conn(self):
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return self._get_connection()
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def _get_connection(self):
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if self._cached_conn is None:
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try:
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import libvirt
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except ImportError:
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raise error.OSFError('libvirt-python is required '
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'to use LibvirtDriver')
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self._cached_conn = libvirt.open(self.connection_uri)
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return self._cached_conn
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def _find_domain_by_mac_address(self, mac_address):
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for domain in self.conn.listAllDomains():
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if mac_address in domain.XMLDesc():
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return domain
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raise error.PowerManagementError(
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'Domain with MAC address %s not found!' % mac_address)
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def _poweroff(self, mac_address):
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LOG.debug('Power off domain with MAC address: %s', mac_address)
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domain = self._find_domain_by_mac_address(mac_address)
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domain.destroy()
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LOG.info('Domain powered off: %s', mac_address)
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def _poweron(self, mac_address):
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LOG.debug('Power on domain with MAC address: %s', mac_address)
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domain = self._find_domain_by_mac_address(mac_address)
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domain.create()
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LOG.info('Domain powered on: %s', mac_address)
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def _reset(self, mac_address):
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LOG.debug('Reset domain with MAC address: %s', mac_address)
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domain = self._find_domain_by_mac_address(mac_address)
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domain.reset()
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LOG.info('Domain reset: %s', mac_address)
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def _snapshot(self, mac_address, snapshot_name, suspend):
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LOG.debug('Create snapshot "%s" for domain with MAC address: %s',
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snapshot_name, mac_address)
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domain = self._find_domain_by_mac_address(mac_address)
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if suspend:
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domain.suspend()
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domain.snapshotCreateXML(
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'<domainsnapshot><name>{}</name></domainsnapshot>'.format(
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snapshot_name))
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if suspend:
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domain.resume()
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LOG.debug('Created snapshot "%s" for domain with MAC address: %s',
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snapshot_name, mac_address)
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def _revert(self, mac_address, snapshot_name, resume):
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LOG.debug('Revert snapshot "%s" for domain with MAC address: %s',
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snapshot_name, mac_address)
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domain = self._find_domain_by_mac_address(mac_address)
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snapshot = domain.snapshotLookupByName(snapshot_name)
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if domain.isActive():
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domain.destroy()
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domain.revertToSnapshot(snapshot)
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if resume:
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domain.resume()
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LOG.debug('Reverted snapshot "%s" for domain with MAC address: %s',
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snapshot_name, mac_address)
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def poweroff(self, mac_addresses_list):
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kwargs_list = [dict(mac_address=mac_address)
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for mac_address in mac_addresses_list]
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utils.run(self._poweroff, kwargs_list)
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def poweron(self, mac_addresses_list):
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kwargs_list = [dict(mac_address=mac_address)
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for mac_address in mac_addresses_list]
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utils.run(self._poweron, kwargs_list)
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def reset(self, mac_addresses_list):
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kwargs_list = [dict(mac_address=mac_address)
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for mac_address in mac_addresses_list]
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utils.run(self._reset, kwargs_list)
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def snapshot(self, mac_addresses_list, snapshot_name, suspend=True):
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kwargs_list = [dict(mac_address=mac_address,
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snapshot_name=snapshot_name,
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suspend=suspend)
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for mac_address in mac_addresses_list]
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utils.run(self._snapshot, kwargs_list)
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def revert(self, mac_addresses_list, snapshot_name, resume=True):
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kwargs_list = [dict(mac_address=mac_address,
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snapshot_name=snapshot_name,
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resume=resume)
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for mac_address in mac_addresses_list]
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utils.run(self._revert, kwargs_list)
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