def acquire(self, hostId):
with nested(self._lock, SANLock._sanlock_lock):
self.log.info("Acquiring cluster lock for domain %s (id: %s)",
self._sdUUID, hostId)
while True:
if SANLock._sanlock_fd is None:
try:
SANLock._sanlock_fd = sanlock.register()
except sanlock.SanlockException as e:
raise se.AcquireLockFailure(
self._sdUUID, e.errno,
"Cannot register to sanlock", str(e))
try:
sanlock.acquire(self._sdUUID,
SDM_LEASE_NAME,
[(self._leasesPath, SDM_LEASE_OFFSET)],
slkfd=SANLock._sanlock_fd)
except sanlock.SanlockException as e:
if e.errno != os.errno.EPIPE:
raise se.AcquireLockFailure(
self._sdUUID, e.errno,
"Cannot acquire cluster lock", str(e))
SANLock._sanlock_fd = None
continue
break
self.log.debug(
"Cluster lock for domain %s successfully acquired "
"(id: %s)", self._sdUUID, hostId)
def acquire(self, hostID):
leaseTimeMs = self._leaseTimeSec * 1000
ioOpTimeoutMs = self._ioOpTimeoutSec * 1000
with self._lock:
self.log.debug("Acquiring cluster lock for domain %s" %
self._sdUUID)
lockUtil = self.getLockUtilFullPath()
acquireLockCommand = subprocess.list2cmdline([
lockUtil, "start", self._sdUUID,
str(hostID),
str(self._lockRenewalIntervalSec),
str(self._leasesPath),
str(leaseTimeMs),
str(ioOpTimeoutMs),
str(self._leaseFailRetry)
])
cmd = [
constants.EXT_SU, misc.IOUSER, '-s', constants.EXT_SH, '-c',
acquireLockCommand
]
(rc, out, err) = misc.execCmd(cmd,
cwd=self.lockUtilPath,
sudo=True,
ioclass=utils.IOCLASS.REALTIME,
ioclassdata=0,
setsid=True)
if rc != 0:
raise se.AcquireLockFailure(self._sdUUID, rc, out, err)
self.log.debug("Clustered lock acquired successfully")
def acquire(self, hostID):
leaseTimeMs = self._leaseTimeSec * 1000
ioOpTimeoutMs = self._ioOpTimeoutSec * 1000
with self._lock:
self.log.debug("Acquiring cluster lock for domain %s" %
self._sdUUID)
lockUtil = os.path.join(self.lockUtilPath, self.lockCmd)
acquireLockCommand = subprocess.list2cmdline([
lockUtil, "start", self._sdUUID,
str(hostID),
str(self._lockRenewalIntervalSec),
str(self._leaseFile),
str(leaseTimeMs),
str(ioOpTimeoutMs),
str(self._leaseFailRetry)
])
cmd = [
constants.EXT_SETSID, constants.EXT_IONICE, '-c1', '-n0',
constants.EXT_SU, misc.IOUSER, '-s', constants.EXT_SH, '-c',
acquireLockCommand
]
(rc, out, err) = misc.execCmd(cmd, cwd=self.lockUtilPath)
if rc != 0:
raise se.AcquireLockFailure(self._sdUUID, rc, out, err)
self.__hostID = hostID
self.log.debug("Clustered lock acquired successfully")
def acquire(self, hostId):
with self._globalLockMapSync:
self.log.info("Acquiring local lock for domain %s (id: %s)",
self._sdUUID, hostId)
lockFile = self._globalLockMap.get(self._sdUUID, None)
if lockFile:
try:
misc.NoIntrCall(fcntl.fcntl, lockFile, fcntl.F_GETFD)
except IOError as e:
# We found a stale file descriptor, removing.
del self._globalLockMap[self._sdUUID]
# Raise any other unkown error.
if e.errno != os.errno.EBADF:
raise
else:
self.log.debug(
"Local lock already acquired for domain "
"%s (id: %s)", self._sdUUID, hostId)
return # success, the lock was already acquired
lockFile = misc.NoIntrCall(os.open, self._idsPath, os.O_RDONLY)
try:
misc.NoIntrCall(fcntl.flock, lockFile,
fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError as e:
misc.NoIntrCall(os.close, lockFile)
if e.errno in (os.errno.EACCES, os.errno.EAGAIN):
raise se.AcquireLockFailure(self._sdUUID, e.errno,
"Cannot acquire local lock",
str(e))
raise
else:
self._globalLockMap[self._sdUUID] = lockFile
self.log.debug(
"Local lock for domain %s successfully acquired "
"(id: %s)", self._sdUUID, hostId)
