def __getResourceCandidatesList(self, resourceName, lockType):
"""
Return list of lock candidates (template and volumes)
"""
volResourcesList = []
template = None
dom = sdCache.produce(sdUUID=self.sdUUID)
# Get the list of the volumes
repoPath = os.path.join(self.storage_repository, dom.getPools()[0])
try:
chain = image.Image(repoPath).getChain(sdUUID=self.sdUUID, imgUUID=resourceName)
except se.ImageDoesNotExistInSD:
log.debug("Image %s does not exist in domain %s", resourceName, self.sdUUID)
return []
# check if the chain is build above a template, or it is a standalone
pvol = chain[0].getParentVolume()
if pvol:
template = pvol.volUUID
elif chain[0].isShared():
# Image of template itself,
# with no other volumes in chain
template = chain[0].volUUID
del chain[:]
volUUIDChain = [vol.volUUID for vol in chain]
volUUIDChain.sort()
# Activate all volumes in chain at once.
# We will attempt to activate all volumes again down to the flow with
# no consequence, since they are already active.
# TODO Fix resource framework to hold images, instead of specific vols.
# This assumes that chains can not spread into more than one SD.
if dom.__class__.__name__ == "BlockStorageDomain":
lvm.activateLVs(self.sdUUID, volUUIDChain)
failed = False
# Acquire template locks:
# - 'lockType' for template's image itself
# - Always 'shared' lock for image based on template
try:
if template:
if len(volUUIDChain) > 0:
volRes = rmanager.acquireResource(self.volumeResourcesNamespace, template, rm.LockType.shared,
timeout=self.resource_default_timeout)
else:
volRes = rmanager.acquireResource(self.volumeResourcesNamespace, template, lockType,
timeout=self.resource_default_timeout)
volResourcesList.append(volRes)
# Acquire 'lockType' volume locks
for volUUID in volUUIDChain:
volRes = rmanager.acquireResource(self.volumeResourcesNamespace, volUUID, lockType,
timeout=self.resource_default_timeout)
volResourcesList.append(volRes)
except (rm.RequestTimedOutError, se.ResourceAcqusitionFailed), e:
log.debug("Cannot acquire volume resource (%s)", str(e))
failed = True
raise
def __init__(self, sdUUID):
domaindir = os.path.join(self.mountpoint, sdUUID)
metadata = selectMetadata(sdUUID)
sd.StorageDomain.__init__(self, sdUUID, domaindir, metadata)
lvm.activateLVs(self.sdUUID, SPECIAL_LVS)
self.metavol = lvm.lvPath(self.sdUUID, sd.METADATA)
try:
self.logBlkSize = self.getMetaParam(DMDK_LOGBLKSIZE)
self.phyBlkSize = self.getMetaParam(DMDK_PHYBLKSIZE)
except KeyError:
# 512 by Saggi "Trust me (Smoch Alai (sic))"
# *blkSize keys may be missing from metadata only for domains that
# existed before the introduction of the keys.
# Such domains supported only 512 sizes
self.logBlkSize = 512
self.phyBlkSize = 512
# Check that all devices in the VG have the same logical and physical
# block sizes.
lvm.checkVGBlockSizes(sdUUID, (self.logBlkSize, self.phyBlkSize))
# _extendlock is used to prevent race between
# VG extend and LV extend.
self._extendlock = threading.Lock()
self.imageGarbageCollector()
self._registerResourceNamespaces()
self._lastUncachedSelftest = 0
def __init__(self, sdUUID):
domaindir = os.path.join(self.mountpoint, sdUUID)
metadata = selectMetadata(sdUUID)
sd.StorageDomain.__init__(self, sdUUID, domaindir, metadata)
lvm.activateLVs(self.sdUUID, SPECIAL_LVS)
self.metavol = lvm.lvPath(self.sdUUID, sd.METADATA)
try:
self.logBlkSize = self.getMetaParam(DMDK_LOGBLKSIZE)
self.phyBlkSize = self.getMetaParam(DMDK_PHYBLKSIZE)
except KeyError:
# Initialize the block sizes metadata if not defined
self.logBlkSize, self.phyBlkSize = lvm.getVGBlockSizes(sdUUID)
self.setMetaParam(DMDK_LOGBLKSIZE, self.logBlkSize)
self.setMetaParam(DMDK_PHYBLKSIZE, self.phyBlkSize)
# Check that all devices in the VG have the same logical and physical
# block sizes.
lvm.checkVGBlockSizes(sdUUID, (self.logBlkSize, self.phyBlkSize))
# _extendlock is used to prevent race between
# VG extend and LV extend.
self._extendlock = threading.Lock()
self.imageGarbageCollector()
self._registerResourceNamespaces()
self._lastUncachedSelftest = 0
def _postZero(sdUUID, volumes):
# Assumed that there is no any thread that can deactivate these LVs
# on this host or change the rw permission on this or any other host.
lvNames = tuple(vol.volUUID for vol in volumes)
# Assert volumes are writable. (Don't do this at home.)
try:
lvm.changelv(sdUUID, lvNames, ("--permission", "rw"))
except se.StorageException:
# Hope this only means that some volumes were already writable.
pass
lvm.activateLVs(sdUUID, lvNames)
for lv in lvm.getLV(sdUUID):
if lv.name in lvNames:
# wipe out the whole volume
try:
misc.ddWatchCopy(
"/dev/zero", lvm.lvPath(sdUUID, lv.name),
vars.task.aborting, int(lv.size),
recoveryCallback=volume.baseAsyncTasksRollback)
except utils.ActionStopped:
raise
except Exception:
raise se.VolumesZeroingError(lv.name)
def __init__(self, sdUUID):
domaindir = os.path.join(self.mountpoint, sdUUID)
metadata = selectMetadata(sdUUID)
sd.StorageDomain.__init__(self, sdUUID, domaindir, metadata)
lvm.activateLVs(self.sdUUID, SPECIAL_LVS)
self.metavol = lvm.lvPath(self.sdUUID, sd.METADATA)
try:
self.logBlkSize = self.getMetaParam(DMDK_LOGBLKSIZE)
self.phyBlkSize = self.getMetaParam(DMDK_PHYBLKSIZE)
except KeyError:
# Initialize the block sizes metadata if not defined
self.logBlkSize, self.phyBlkSize = lvm.getVGBlockSizes(sdUUID)
self.setMetaParam(DMDK_LOGBLKSIZE, self.logBlkSize)
self.setMetaParam(DMDK_PHYBLKSIZE, self.phyBlkSize)
# Check that all devices in the VG have the same logical and physical
# block sizes.
lvm.checkVGBlockSizes(sdUUID, (self.logBlkSize, self.phyBlkSize))
# _extendlock is used to prevent race between
# VG extend and LV extend.
self._extendlock = threading.Lock()
self.imageGarbageCollector()
self._registerResourceNamespaces()
self._lastUncachedSelftest = 0
def __init__(self, sdUUID):
domaindir = os.path.join(self.mountpoint, sdUUID)
metadata = selectMetadata(sdUUID)
sd.StorageDomain.__init__(self, sdUUID, domaindir, metadata)
lvm.activateLVs(self.sdUUID, SPECIAL_LVS)
self.metavol = lvm.lvPath(self.sdUUID, sd.METADATA)
try:
self.logBlkSize = self.getMetaParam(DMDK_LOGBLKSIZE)
self.phyBlkSize = self.getMetaParam(DMDK_PHYBLKSIZE)
except KeyError:
# 512 by Saggi "Trust me (Smoch Alai (sic))"
# *blkSize keys may be missing from metadata only for domains that
# existed before the introduction of the keys.
# Such domains supported only 512 sizes
self.logBlkSize = 512
self.phyBlkSize = 512
# Check that all devices in the VG have the same logical and physical
# block sizes.
lvm.checkVGBlockSizes(sdUUID, (self.logBlkSize, self.phyBlkSize))
# _extendlock is used to prevent race between
# VG extend and LV extend.
self._extendlock = threading.Lock()
self.imageGarbageCollector()
self._registerResourceNamespaces()
self._lastUncachedSelftest = 0
def readlines(self):
# Fetch the metadata from metadata volume
lvm.activateLVs(self._vgName, self._lvName)
m = misc.readblock(self.metavol, self._offset, self._size)
# Read from metadata volume will bring a load of zeroes trailing
# actual metadata. Strip it out.
metadata = [i for i in m if len(i) > 0 and i[0] != '\x00' and "=" in i]
return metadata
def readlines(self):
# Fetch the metadata from metadata volume
lvm.activateLVs(self._vgName, self._lvName)
m = misc.readblock(self.metavol, self._offset, self._size)
# Read from metadata volume will bring a load of zeroes trailing
# actual metadata. Strip it out.
metadata = [i for i in m if len(i) > 0 and i[0] != '\x00' and "=" in i]
return metadata
def mountMaster(self):
"""
Mount the master metadata file system. Should be called only by SPM.
"""
lvm.activateLVs(self.sdUUID, MASTERLV)
masterDir = os.path.join(self.domaindir, sd.MASTER_FS_DIR)
fileUtils.createdir(masterDir)
masterfsdev = lvm.lvPath(self.sdUUID, MASTERLV)
cmd = [constants.EXT_FSCK, "-p", masterfsdev]
(rc, out, err) = misc.execCmd(cmd)
# fsck exit codes
# 0 - No errors
# 1 - File system errors corrected
# 2 - File system errors corrected, system should
# be rebooted
# 4 - File system errors left uncorrected
# 8 - Operational error
# 16 - Usage or syntax error
# 32 - E2fsck canceled by user request
# 128 - Shared library error
if rc == 1 or rc == 2:
# rc is a number
self.log.info("fsck corrected fs errors (%s)", rc)
if rc >= 4:
raise se.BlockStorageDomainMasterFSCKError(masterfsdev, rc)
# TODO: Remove when upgrade is only from a version which creates ext3
# Try to add a journal - due to unfortunate circumstances we exposed
# to the public the code that created ext2 file system instead of ext3.
# In order to make up for it we are trying to add journal here, just
# to be sure (and we have fixed the file system creation).
# If there is a journal already tune2fs will do nothing, indicating this
# condition only with exit code. However, we do not really care.
cmd = [constants.EXT_TUNE2FS, "-j", masterfsdev]
misc.execCmd(cmd)
rc = fileUtils.mount(masterfsdev, masterDir, mountType=fileUtils.FSTYPE_EXT3)
# mount exit codes
# mount has the following return codes (the bits can be ORed):
# 0 success
# 1 incorrect invocation or permissions
# 2 system error (out of memory, cannot fork, no more loop devices)
# 4 internal mount bug or missing nfs support in mount
# 8 user interrupt
# 16 problems writing or locking /etc/mtab
# 32 mount failure
# 64 some mount succeeded
if rc != 0:
raise se.BlockStorageDomainMasterMountError(masterfsdev, rc, out)
cmd = [constants.EXT_CHOWN, "%s:%s" % (constants.METADATA_USER, constants.METADATA_GROUP), masterDir]
(rc, out, err) = misc.execCmd(cmd)
if rc != 0:
self.log.error("failed to chown %s", masterDir)
def mountMaster(self):
"""
Mount the master metadata file system. Should be called only by SPM.
"""
lvm.activateLVs(self.sdUUID, MASTERLV)
masterDir = os.path.join(self.domaindir, sd.MASTER_FS_DIR)
fileUtils.createdir(masterDir)
masterfsdev = lvm.lvPath(self.sdUUID, MASTERLV)
cmd = [constants.EXT_FSCK, "-p", masterfsdev]
(rc, out, err) = misc.execCmd(cmd,
sudo=True,
deathSignal=signal.SIGKILL)
# fsck exit codes
# 0 - No errors
# 1 - File system errors corrected
# 2 - File system errors corrected, system should
# be rebooted
# 4 - File system errors left uncorrected
# 8 - Operational error
# 16 - Usage or syntax error
# 32 - E2fsck canceled by user request
# 128 - Shared library error
if rc == 1 or rc == 2:
# rc is a number
self.log.info("fsck corrected fs errors (%s)", rc)
if rc >= 4:
raise se.BlockStorageDomainMasterFSCKError(masterfsdev, rc)
# TODO: Remove when upgrade is only from a version which creates ext3
# Try to add a journal - due to unfortunate circumstances we exposed
# to the public the code that created ext2 file system instead of ext3.
# In order to make up for it we are trying to add journal here, just
# to be sure (and we have fixed the file system creation).
# If there is a journal already tune2fs will do nothing, indicating
# this condition only with exit code. However, we do not really care.
cmd = [constants.EXT_TUNE2FS, "-j", masterfsdev]
misc.execCmd(cmd, sudo=True, deathSignal=signal.SIGKILL)
masterMount = mount.Mount(masterfsdev, masterDir)
try:
masterMount.mount(vfstype=mount.VFS_EXT3)
except mount.MountError as ex:
rc, out = ex
raise se.BlockStorageDomainMasterMountError(masterfsdev, rc, out)
cmd = [
constants.EXT_CHOWN,
"%s:%s" % (constants.METADATA_USER, constants.METADATA_GROUP),
masterDir
]
(rc, out, err) = misc.execCmd(cmd, sudo=True)
if rc != 0:
self.log.error("failed to chown %s", masterDir)
def activateVolumes(self, imgUUID, volUUIDs):
"""
Activate all the volumes belonging to the image.
imgUUID: the image to be deactivated.
allVols: getAllVolumes result.
If the image is based on a template image it will be activated.
"""
lvm.activateLVs(self.sdUUID, volUUIDs)
vgDir = os.path.join("/dev", self.sdUUID)
return self.createImageLinks(vgDir, imgUUID, volUUIDs)
def activateVolumes(self, imgUUID, volUUIDs):
"""
Activate all the volumes belonging to the image.
imgUUID: the image to be deactivated.
allVols: getAllVolumes result.
If the image is based on a template image it will be activated.
"""
lvm.activateLVs(self.sdUUID, volUUIDs)
vgDir = os.path.join("/dev", self.sdUUID)
return self.createImageLinks(vgDir, imgUUID, volUUIDs)
def mountMaster(self):
"""
Mount the master metadata file system. Should be called only by SPM.
"""
lvm.activateLVs(self.sdUUID, MASTERLV)
masterDir = os.path.join(self.domaindir, sd.MASTER_FS_DIR)
fileUtils.createdir(masterDir)
masterfsdev = lvm.lvPath(self.sdUUID, MASTERLV)
cmd = [constants.EXT_FSCK, "-p", masterfsdev]
(rc, out, err) = misc.execCmd(cmd, sudo=True,
deathSignal=signal.SIGKILL)
# fsck exit codes
# 0 - No errors
# 1 - File system errors corrected
# 2 - File system errors corrected, system should
# be rebooted
# 4 - File system errors left uncorrected
# 8 - Operational error
# 16 - Usage or syntax error
# 32 - E2fsck canceled by user request
# 128 - Shared library error
if rc == 1 or rc == 2:
# rc is a number
self.log.info("fsck corrected fs errors (%s)", rc)
if rc >= 4:
raise se.BlockStorageDomainMasterFSCKError(masterfsdev, rc)
# TODO: Remove when upgrade is only from a version which creates ext3
# Try to add a journal - due to unfortunate circumstances we exposed
# to the public the code that created ext2 file system instead of ext3.
# In order to make up for it we are trying to add journal here, just
# to be sure (and we have fixed the file system creation).
# If there is a journal already tune2fs will do nothing, indicating
# this condition only with exit code. However, we do not really care.
cmd = [constants.EXT_TUNE2FS, "-j", masterfsdev]
misc.execCmd(cmd, sudo=True, deathSignal=signal.SIGKILL)
masterMount = mount.Mount(masterfsdev, masterDir)
try:
masterMount.mount(vfstype=mount.VFS_EXT3)
except mount.MountError as ex:
rc, out = ex
raise se.BlockStorageDomainMasterMountError(masterfsdev, rc, out)
cmd = [constants.EXT_CHOWN, "%s:%s" %
(constants.METADATA_USER, constants.METADATA_GROUP), masterDir]
(rc, out, err) = misc.execCmd(cmd, sudo=True)
if rc != 0:
self.log.error("failed to chown %s", masterDir)
def refreshDirTree(self):
# create domain images folder
imagesPath = os.path.join(self.domaindir, sd.DOMAIN_IMAGES)
fileUtils.createdir(imagesPath)
# create domain special volumes folder
domMD = os.path.join(self.domaindir, sd.DOMAIN_META_DATA)
fileUtils.createdir(domMD)
lvm.activateLVs(self.sdUUID, SPECIAL_LVS)
for lvName in SPECIAL_LVS:
dst = os.path.join(domMD, lvName)
if not os.path.lexists(dst):
src = lvm.lvPath(self.sdUUID, lvName)
os.symlink(src, dst)
def refreshDirTree(self):
# create domain images folder
imagesPath = os.path.join(self.domaindir, sd.DOMAIN_IMAGES)
fileUtils.createdir(imagesPath)
# create domain special volumes folder
domMD = os.path.join(self.domaindir, sd.DOMAIN_META_DATA)
fileUtils.createdir(domMD)
lvm.activateLVs(self.sdUUID, SPECIAL_LVS)
for lvName in SPECIAL_LVS:
dst = os.path.join(domMD, lvName)
if not os.path.lexists(dst):
src = lvm.lvPath(self.sdUUID, lvName)
os.symlink(src, dst)
def writelines(self, lines):
lvm.activateLVs(self._vgName, self._lvName)
# Write `metadata' to metadata volume
metaStr = StringIO()
for line in lines:
metaStr.write(line)
metaStr.write("\n")
if metaStr.pos > self._size:
raise se.MetadataOverflowError()
# Clear out previous data - it is a volume, not a file
metaStr.write('\0' * (self._size - metaStr.pos))
data = metaStr.getvalue()
with fileUtils.DirectFile(self.metavol, "r+d") as f:
f.seek(self._offset)
f.write(data)
def writelines(self, lines):
lvm.activateLVs(self._vgName, self._lvName)
# Write `metadata' to metadata volume
metaStr = StringIO()
for line in lines:
metaStr.write(line)
metaStr.write("\n")
if metaStr.pos > self._size:
raise se.MetadataOverflowError()
# Clear out previous data - it is a volume, not a file
metaStr.write('\0' * (self._size - metaStr.pos))
data = metaStr.getvalue()
with fileUtils.DirectFile(self.metavol, "r+d") as f:
f.seek(self._offset)
f.write(data)
def __getResourceCandidatesList(self, resourceName, lockType):
"""
Return list of lock candidates (template and volumes)
"""
volResourcesList = []
template = None
dom = sdCache.produce(sdUUID=self.sdUUID)
# Get the list of the volumes
repoPath = os.path.join(self.storage_repository, dom.getPools()[0])
try:
chain = image.Image(repoPath).getChain(sdUUID=self.sdUUID,
imgUUID=resourceName)
except se.ImageDoesNotExistInSD:
log.debug("Image %s does not exist in domain %s", resourceName,
self.sdUUID)
return []
# check if the chain is build above a template, or it is a standalone
pvol = chain[0].getParentVolume()
if pvol:
template = pvol.volUUID
elif chain[0].isShared():
# Image of template itself,
# with no other volumes in chain
template = chain[0].volUUID
del chain[:]
volUUIDChain = [vol.volUUID for vol in chain]
volUUIDChain.sort()
# Activate all volumes in chain at once.
# We will attempt to activate all volumes again down to the flow with
# no consequence, since they are already active.
# TODO Fix resource framework to hold images, instead of specific vols.
# This assumes that chains can not spread into more than one SD.
if dom.__class__.__name__ == "BlockStorageDomain":
lvm.activateLVs(self.sdUUID, volUUIDChain)
failed = False
# Acquire template locks:
# - 'lockType' for template's image itself
# - Always 'shared' lock for image based on template
try:
if template:
if len(volUUIDChain) > 0:
volRes = rmanager.acquireResource(
self.volumeResourcesNamespace,
template,
rm.LockType.shared,
timeout=self.resource_default_timeout)
else:
volRes = rmanager.acquireResource(
self.volumeResourcesNamespace,
template,
lockType,
timeout=self.resource_default_timeout)
volResourcesList.append(volRes)
# Acquire 'lockType' volume locks
for volUUID in volUUIDChain:
volRes = rmanager.acquireResource(
self.volumeResourcesNamespace,
volUUID,
lockType,
timeout=self.resource_default_timeout)
volResourcesList.append(volRes)
except (rm.RequestTimedOutError, se.ResourceAcqusitionFailed) as e:
log.debug("Cannot acquire volume resource (%s)", str(e))
failed = True
raise
except Exception:
log.debug("Cannot acquire volume resource", exc_info=True)
failed = True
raise
finally:
if failed:
# Release already acquired template/volumes locks
for volRes in volResourcesList:
volRes.release()
return volResourcesList
def activateVolumes(self, imgUUID, volUUIDs):
"""
Activate all the volumes listed in volUUIDs
"""
lvm.activateLVs(self.sdUUID, volUUIDs)
def __init__(self, vg, lv, lockType):
self._vg = vg
self._lv = lv
lvm.activateLVs(self._vg, self._lv)
def getIdsFilePath(self):
lvm.activateLVs(self.sdUUID, [sd.IDS])
return lvm.lvPath(self.sdUUID, sd.IDS)
def __init__(self, vg, lv, lockType):
self._vg = vg
self._lv = lv
lvm.activateLVs(self._vg, [self._lv])
def activateVolumes(self, volUUIDs):
"""
Activate all the volumes listed in volUUIDs
"""
lvm.activateLVs(self.sdUUID, volUUIDs)
def getLeasesFilePath(self):
lvm.activateLVs(self.sdUUID, [sd.LEASES])
return lvm.lvPath(self.sdUUID, sd.LEASES)
def mountMaster(self):
"""
Mount the master metadata file system. Should be called only by SPM.
"""
lvm.activateLVs(self.sdUUID, MASTERLV)
masterDir = os.path.join(self.domaindir, sd.MASTER_FS_DIR)
fileUtils.createdir(masterDir)
masterfsdev = lvm.lvPath(self.sdUUID, MASTERLV)
cmd = [constants.EXT_FSCK, "-p", masterfsdev]
(rc, out, err) = misc.execCmd(cmd)
# fsck exit codes
# 0 - No errors
# 1 - File system errors corrected
# 2 - File system errors corrected, system should
# be rebooted
# 4 - File system errors left uncorrected
# 8 - Operational error
# 16 - Usage or syntax error
# 32 - E2fsck canceled by user request
# 128 - Shared library error
if rc == 1 or rc == 2:
# rc is a number
self.log.info("fsck corrected fs errors (%s)", rc)
if rc >= 4:
raise se.BlockStorageDomainMasterFSCKError(masterfsdev, rc)
# TODO: Remove when upgrade is only from a version which creates ext3
# Try to add a journal - due to unfortunate circumstances we exposed
# to the public the code that created ext2 file system instead of ext3.
# In order to make up for it we are trying to add journal here, just
# to be sure (and we have fixed the file system creation).
# If there is a journal already tune2fs will do nothing, indicating this
# condition only with exit code. However, we do not really care.
cmd = [constants.EXT_TUNE2FS, "-j", masterfsdev]
misc.execCmd(cmd)
rc = fileUtils.mount(masterfsdev,
masterDir,
mountType=fileUtils.FSTYPE_EXT3)
# mount exit codes
# mount has the following return codes (the bits can be ORed):
# 0 success
# 1 incorrect invocation or permissions
# 2 system error (out of memory, cannot fork, no more loop devices)
# 4 internal mount bug or missing nfs support in mount
# 8 user interrupt
# 16 problems writing or locking /etc/mtab
# 32 mount failure
# 64 some mount succeeded
if rc != 0:
raise se.BlockStorageDomainMasterMountError(masterfsdev, rc, out)
cmd = [
constants.EXT_CHOWN,
"%s:%s" % (constants.METADATA_USER, constants.METADATA_GROUP),
masterDir
]
(rc, out, err) = misc.execCmd(cmd)
if rc != 0:
self.log.error("failed to chown %s", masterDir)
def getIdsFilePath(self):
lvm.activateLVs(self.sdUUID, [sd.IDS])
return lvm.lvPath(self.sdUUID, sd.IDS)
def getLeasesFilePath(self):
lvm.activateLVs(self.sdUUID, [sd.LEASES])
return lvm.lvPath(self.sdUUID, sd.LEASES)
def __init__(self, vg, lv, lockType):
self._vg = vg
self._lv = lv
lvm.activateLVs(self._vg, self._lv)
self.switchLockType(lockType)
