def create(cls, repoPath, sdUUID, imgUUID, size, volFormat, preallocate,
diskType, volUUID, desc, srcImgUUID, srcVolUUID):
"""
Create a new volume with given size or snapshot
'size' - in sectors
'volFormat' - volume format COW / RAW
'preallocate' - Prealocate / Sparse
'diskType' - string that describes disk type System|Data|Shared|Swap|Temp
'srcImgUUID' - source image UUID
'srcVolUUID' - source volume UUID
"""
if not volUUID:
volUUID = str(uuid.uuid4())
if volUUID == volume.BLANK_UUID:
raise se.InvalidParameterException("volUUID", volUUID)
# Validate volume parameters should be checked here for all
# internal flows using volume creation.
cls.validateCreateVolumeParams(volFormat, preallocate, srcVolUUID)
mysd = sdCache.produce(sdUUID=sdUUID)
try:
lvm.getLV(sdUUID, volUUID)
except se.LogicalVolumeDoesNotExistError:
pass #OK, this is a new volume
else:
raise se.VolumeAlreadyExists(volUUID)
imageDir = image.Image(repoPath).create(sdUUID, imgUUID)
vol_path = os.path.join(imageDir, volUUID)
pvol = None
voltype = "LEAF"
try:
if srcVolUUID != volume.BLANK_UUID:
# We have a parent
if srcImgUUID == volume.BLANK_UUID:
srcImgUUID = imgUUID
pvol = BlockVolume(repoPath, sdUUID, srcImgUUID, srcVolUUID)
# Cannot create snapshot for ILLEGAL volume
if not pvol.isLegal():
raise se.createIllegalVolumeSnapshotError(pvol.volUUID)
if imgUUID != srcImgUUID:
pvol.share(imageDir, hard=False)
pvol = BlockVolume(repoPath, sdUUID, imgUUID, srcVolUUID)
# override size param by parent's size
size = pvol.getSize()
except se.StorageException:
cls.log.error("Unexpected error", exc_info=True)
raise
except Exception, e:
cls.log.error("Unexpected error", exc_info=True)
raise se.VolumeCannotGetParent(
"blockVolume can't get parent %s for volume %s: %s" %
(srcVolUUID, volUUID, str(e)))
def create(cls,
repoPath,
sdUUID,
imgUUID,
size,
volFormat,
preallocate,
diskType,
volUUID,
desc,
srcImgUUID,
srcVolUUID,
initialSize=None):
"""
Create a new volume with given size or snapshot
'size' - in sectors
'volFormat' - volume format COW / RAW
'preallocate' - Preallocate / Sparse
'diskType' - enum (API.Image.DiskTypes)
'srcImgUUID' - source image UUID
'srcVolUUID' - source volume UUID
'initialSize' - initial volume size in sectors,
in case of thin provisioning
"""
dom = sdCache.produce(sdUUID)
dom.validateCreateVolumeParams(volFormat,
srcVolUUID,
preallocate=preallocate)
imgPath = image.Image(repoPath).create(sdUUID, imgUUID)
volPath = os.path.join(imgPath, volUUID)
volParent = None
volType = type2name(LEAF_VOL)
# Get the specific class name and class module to be used in the
# Recovery tasks.
clsModule, clsName = cls._getModuleAndClass()
try:
if srcVolUUID != BLANK_UUID:
# When the srcImgUUID isn't specified we assume it's the same
# as the imgUUID
if srcImgUUID == BLANK_UUID:
srcImgUUID = imgUUID
volParent = cls(repoPath, sdUUID, srcImgUUID, srcVolUUID)
if not volParent.isLegal():
raise se.createIllegalVolumeSnapshotError(
volParent.volUUID)
if imgUUID != srcImgUUID:
volParent.share(imgPath)
volParent = cls(repoPath, sdUUID, imgUUID, srcVolUUID)
# Override the size with the size of the parent
size = volParent.getSize()
except se.StorageException:
cls.log.error("Unexpected error", exc_info=True)
raise
except Exception as e:
cls.log.error("Unexpected error", exc_info=True)
raise se.VolumeCannotGetParent(
"Couldn't get parent %s for volume %s: %s" %
(srcVolUUID, volUUID, e))
try:
cls.log.info("Creating volume %s", volUUID)
# Rollback sentinel to mark the start of the task
vars.task.pushRecovery(
task.Recovery(task.ROLLBACK_SENTINEL, clsModule, clsName,
"startCreateVolumeRollback",
[sdUUID, imgUUID, volUUID]))
# Create volume rollback
vars.task.pushRecovery(
task.Recovery("Halfbaked volume rollback", clsModule, clsName,
"halfbakedVolumeRollback",
[sdUUID, volUUID, volPath]))
# Specific volume creation (block, file, etc...)
try:
metaId = cls._create(dom,
imgUUID,
volUUID,
size,
volFormat,
preallocate,
volParent,
srcImgUUID,
srcVolUUID,
volPath,
initialSize=initialSize)
except (se.VolumeAlreadyExists, se.CannotCreateLogicalVolume,
se.VolumeCreationError, se.InvalidParameterException) as e:
cls.log.error("Failed to create volume %s: %s", volPath, e)
vars.task.popRecovery()
raise
# When the volume format is raw what the guest sees is the apparent
# size of the file/device therefore if the requested size doesn't
# match the apparent size (eg: physical extent granularity in LVM)
# we need to update the size value so that the metadata reflects
# the correct state.
if volFormat == RAW_FORMAT:
apparentSize = int(dom.getVSize(imgUUID, volUUID) / BLOCK_SIZE)
if apparentSize < size:
cls.log.error(
"The volume %s apparent size %s is smaller "
"than the requested size %s", volUUID, apparentSize,
size)
raise se.VolumeCreationError()
if apparentSize > size:
cls.log.info(
"The requested size for volume %s doesn't "
"match the granularity on domain %s, "
"updating the volume size from %s to %s", volUUID,
sdUUID, size, apparentSize)
size = apparentSize
vars.task.pushRecovery(
task.Recovery("Create volume metadata rollback", clsModule,
clsName, "createVolumeMetadataRollback",
map(str, metaId)))
cls.newMetadata(metaId, sdUUID, imgUUID, srcVolUUID, size,
type2name(volFormat), type2name(preallocate),
volType, diskType, desc, LEGAL_VOL)
if dom.hasVolumeLeases():
cls.newVolumeLease(metaId, sdUUID, volUUID)
except se.StorageException:
cls.log.error("Unexpected error", exc_info=True)
raise
except Exception as e:
cls.log.error("Unexpected error", exc_info=True)
raise se.VolumeCreationError("Volume creation %s failed: %s" %
(volUUID, e))
# Remove the rollback for the halfbaked volume
vars.task.replaceRecoveries(
task.Recovery("Create volume rollback", clsModule, clsName,
"createVolumeRollback",
[repoPath, sdUUID, imgUUID, volUUID, imgPath]))
return volUUID