def merge(self, driveSpec, base, top, bandwidth, job_id):
bandwidth = int(bandwidth)
if job_id is None:
job_id = str(uuid.uuid4())
try:
drive = self._vm.findDriveByUUIDs(driveSpec)
except LookupError:
raise exception.ImageFileNotFound("Cannot find drive",
driveSpec=driveSpec,
job=job_id)
job = self._create_job(job_id, drive, base, top, bandwidth)
try:
base_info = self._vm.getVolumeInfo(drive.domainID, drive.poolID,
drive.imageID, job.base)
top_info = self._vm.getVolumeInfo(drive.domainID, drive.poolID,
drive.imageID, job.top)
except errors.StorageUnavailableError as e:
raise exception.MergeFailed(str(e),
top=top,
base=job.base,
job=job_id)
if base_info['voltype'] == 'SHARED':
raise exception.MergeFailed("Base volume is shared",
base_info=base_info,
job=job_id)
self._validate_base_size(drive, base_info, top_info)
if self._base_needs_refresh(drive, base_info):
self._refresh_base(drive, base_info)
with self._lock:
try:
self._track_job(job, drive)
except JobExistsError as e:
raise exception.MergeFailed(str(e), job=job.id)
if self._base_needs_extend(drive, job, base_info):
job.extend = {
"attempt": 1,
"base_size": int(base_info["apparentsize"]),
"top_size": int(top_info["apparentsize"]),
"capacity": int(top_info["capacity"]),
}
self._start_extend(drive, job)
else:
self._start_commit(drive, job)
# Trigger the collection of stats before returning so that callers
# of getVmStats after this returns will see the new job
self._vm.updateVmJobs()
def _start_commit(self, drive, job):
"""
Start libvirt blockCommit block job.
Must be called under self._lock.
"""
# Persist the job before starting the commit, to ensure that vdsm will
# know about the commit if it was killed after the block job was
# started.
job.state = Job.COMMIT
self._persist_jobs()
# Check that libvirt exposes full volume chain information
actual_chain = self._vm.query_drive_volume_chain(drive)
if actual_chain is None:
self._untrack_job(job.id)
raise exception.MergeFailed("Cannot get drive actual volume chain",
drive=drive.name,
alias=drive.alias,
job=job.id)
try:
base_target = drive.volume_target(job.base, actual_chain)
top_target = drive.volume_target(job.top, actual_chain)
except VolumeNotFound as e:
self._untrack_job(job.id)
raise exception.MergeFailed(str(e),
top=job.top,
base=job.base,
chain=actual_chain,
job=job.id)
# Indicate that we expect libvirt to maintain the relative paths of
# backing files. This is necessary to ensure that a volume chain is
# visible from any host even if the mountpoint is different.
flags = libvirt.VIR_DOMAIN_BLOCK_COMMIT_RELATIVE
if job.top == drive.volumeID:
# Pass a flag to libvirt to indicate that we expect a two phase
# block job. In the first phase, data is copied to base. Once
# completed, an event is raised to indicate that the job has
# transitioned to the second phase. We must then tell libvirt to
# pivot to the new active layer (base).
flags |= libvirt.VIR_DOMAIN_BLOCK_COMMIT_ACTIVE
orig_chain = [entry.uuid for entry in actual_chain]
chain_str = logutils.volume_chain_to_str(orig_chain)
log.info(
"Starting merge with job_id=%r, original chain=%s, "
"disk=%r, base=%r, top=%r, bandwidth=%d, flags=%d", job.id,
chain_str, drive.name, base_target, top_target, job.bandwidth,
flags)
try:
# pylint: disable=no-member
self._dom.blockCommit(drive.name,
base_target,
top_target,
job.bandwidth,
flags=flags)
except libvirt.libvirtError as e:
self._untrack_job(job.id)
raise exception.MergeFailed(str(e), job=job.id)
# codes 20-35 are reserved for add/delNetwork # code 39 was used for: # wrongHost - migration destination has an invalid hostname 'unavail': exception.ResourceUnavailable().response(), 'changeDisk': exception.ChangeDiskFailed().response(), 'destroyErr': exception.VMDestroyFailed().response(), 'fenceAgent': exception.UnsupportedFenceAgent().response(), 'noimpl': exception.MethodNotImplemented().response(), 'hotplugDisk': exception.HotplugDiskFailed().response(), 'hotunplugDisk': exception.HotunplugDiskFailed().response(), 'migCancelErr': exception.MigrationCancelationFailed().response(), 'snapshotErr': exception.SnapshotFailed().response(), 'hotplugNic': exception.HotplugNicFailed().response(), 'hotunplugNic': exception.HotunplugNicFailed().response(), 'migInProgress': exception.MigrationInProgress().response(), 'mergeErr': exception.MergeFailed().response(), 'balloonErr': exception.BalloonError().response(), 'momErr': exception.MOMPolicyUpdateFailed().response(), 'replicaErr': exception.ReplicaError().response(), 'updateDevice': exception.UpdateDeviceFailed().response(), 'hwInfoErr': exception.CannotRetrieveHWInfo().response(), 'resizeErr': exception.BadDiskResizeParameter().response(), 'transientErr': exception.TransientError().response(), 'setNumberOfCpusErr': exception.SetNumberOfCpusFailed().response(), 'haErr': exception.SetHAPolicyFailed().response(), 'cpuTuneErr': exception.CpuTuneError().response(), 'updateVmPolicyErr': exception.UpdateVMPolicyFailed().response(), 'updateIoTuneErr': exception.UpdateIOTuneError().response(), 'V2VConnection': exception.V2VConnectionError().response(), 'NoSuchJob': exception.NoSuchJob().response(), 'V2VNoSuchOvf': exception.V2VNoSuchOVF().response(),
