class Preallocator:
def __init__(self, vmms):
self.machines = TangoDictionary("machines")
self.lock = threading.Lock()
self.nextID = TangoIntValue("nextID", 1000)
self.vmms = vmms
self.log = logging.getLogger("Preallocator")
def poolSize(self, vmName):
""" poolSize - returns the size of the vmName pool, for external callers
"""
if vmName not in self.machines.keys():
return 0
else:
return len(self.machines.get(vmName)[0])
def update(self, vm, num):
""" update - Updates the number of machines of a certain type
to be preallocated.
This function is called via the TangoServer HTTP interface.
It will validate the request,update the machine list, and
then spawn child threads to do the creation and destruction
of machines as necessary.
"""
self.lock.acquire()
if vm.name not in self.machines.keys():
self.machines.set(vm.name, [[], TangoQueue(vm.name)])
self.log.debug("Creating empty pool of %s instances" % (vm.name))
self.lock.release()
delta = num - len(self.machines.get(vm.name)[0])
if delta > 0:
# We need more self.machines, spin them up.
self.log.debug("update: Creating %d new %s instances" % (delta, vm.name))
threading.Thread(target=self.__create(vm, delta)).start()
elif delta < 0:
# We have too many self.machines, remove them from the pool
self.log.debug("update: Destroying %d preallocated %s instances" % (-delta, vm.name))
for i in range(-1 * delta):
threading.Thread(target=self.__destroy(vm)).start()
# If delta == 0 then we are the perfect number!
def allocVM(self, vmName):
""" allocVM - Allocate a VM from the free list
"""
vm = None
if vmName in self.machines.keys():
self.lock.acquire()
if not self.machines.get(vmName)[1].empty():
vm = self.machines.get(vmName)[1].get_nowait()
self.lock.release()
# If we're not reusing instances, then crank up a replacement
if vm and not Config.REUSE_VMS:
threading.Thread(target=self.__create(vm, 1)).start()
return vm
def freeVM(self, vm):
""" freeVM - Returns a VM instance to the free list
"""
# Sanity check: Return a VM to the free list only if it is
# still a member of the pool.
not_found = False
self.lock.acquire()
if vm and vm.id in self.machines.get(vm.name)[0]:
machine = self.machines.get(vm.name)
machine[1].put(vm)
self.machines.set(vm.name, machine)
else:
not_found = True
self.lock.release()
# The VM is no longer in the pool.
if not_found:
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(vm)
def addVM(self, vm):
""" addVM - add a particular VM instance to the pool
"""
self.lock.acquire()
machine = self.machines.get(vm.name)
machine[0].append(vm.id)
self.machines.set(vm.name, machine)
self.lock.release()
def removeVM(self, vm):
""" removeVM - remove a particular VM instance from the pool
"""
self.lock.acquire()
machine = self.machines.get(vm.name)
machine[0].remove(vm.id)
self.machines.set(vm.name, machine)
self.lock.release()
def _getNextID(self):
""" _getNextID - returns next ID to be used for a preallocated
VM. Preallocated VM's have 4-digit ID numbers between 1000
and 9999.
"""
self.lock.acquire()
id = self.nextID.get()
self.nextID.increment()
if self.nextID.get() > 9999:
self.nextID.set(1000)
self.lock.release()
return id
def __create(self, vm, cnt):
""" __create - Creates count VMs and adds them to the pool
This function should always be called in a thread since it
might take a long time to complete.
"""
vmms = self.vmms[vm.vmms]
self.log.debug("__create: Using VMMS %s " % (Config.VMMS_NAME))
for i in range(cnt):
newVM = copy.deepcopy(vm)
newVM.id = self._getNextID()
self.log.debug("__create|calling initializeVM")
vmms.initializeVM(newVM)
self.log.debug("__create|done with initializeVM")
time.sleep(Config.CREATEVM_SECS)
self.addVM(newVM)
self.freeVM(newVM)
self.log.debug("__create: Added vm %s to pool %s " % (newVM.id, newVM.name))
def __destroy(self, vm):
""" __destroy - Removes a VM from the pool
If the user asks for fewer preallocated VMs, then we will
remove some excess ones. This function should be called in a
thread context. Notice that we can only remove a free vm, so
it's possible we might not be able to satisfy the request if
the free list is empty.
"""
self.lock.acquire()
dieVM = self.machines.get(vm.name)[1].get_nowait()
self.lock.release()
if dieVM:
self.removeVM(dieVM)
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(dieVM)
def createVM(self, vm):
""" createVM - Called in non-thread context to create a single
VM and add it to the pool
"""
vmms = self.vmms[vm.vmms]
newVM = copy.deepcopy(vm)
newVM.id = self._getNextID()
self.log.info("createVM|calling initializeVM")
vmms.initializeVM(newVM)
self.log.info("createVM|done with initializeVM")
self.addVM(newVM)
self.freeVM(newVM)
self.log.debug("createVM: Added vm %s to pool %s" % (newVM.id, newVM.name))
def destroyVM(self, vmName, id):
""" destroyVM - Called by the delVM API function to remove and
destroy a particular VM instance from a pool. We only allow
this function when the system is queiscent (pool size == free
size)
"""
if vmName not in self.machines.keys():
return -1
dieVM = None
self.lock.acquire()
size = self.machines.get(vmName)[1].qsize()
if size == len(self.machines.get(vmName)[0]):
for i in range(size):
vm = self.machines.get(vmName)[1].get_nowait()
if vm.id != id:
self.machines.get(vmName)[1].put(vm)
else:
dieVM = vm
self.lock.release()
if dieVM:
self.removeVM(dieVM)
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(dieVM)
return 0
else:
return -1
def getAllPools(self):
result = {}
for vmName in self.machines.keys():
result[vmName] = self.getPool(vmName)
return result
def getPool(self, vmName):
""" getPool - returns the members of a pool and its free list
"""
result = {}
if vmName not in self.machines.keys():
return result
result["total"] = []
result["free"] = []
free_list = []
self.lock.acquire()
size = self.machines.get(vmName)[1].qsize()
for i in range(size):
vm = self.machines.get(vmName)[1].get_nowait()
free_list.append(vm.id)
machine = self.machines.get(vmName)
machine[1].put(vm)
self.machines.set(vmName, machine)
self.lock.release()
result["total"] = self.machines.get(vmName)[0]
result["free"] = free_list
return result
class Preallocator(object):
def __init__(self, vmms):
self.machines = TangoDictionary("machines")
self.lock = threading.Lock()
self.nextID = TangoIntValue("nextID", 1000)
self.vmms = vmms
self.log = logging.getLogger("Preallocator")
def poolSize(self, vmName):
""" poolSize - returns the size of the vmName pool, for external callers
"""
if vmName not in self.machines:
return 0
else:
return len(self.machines.get(vmName)[0])
def update(self, vm, num):
""" update - Updates the number of machines of a certain type
to be preallocated.
This function is called via the TangoServer HTTP interface.
It will validate the request,update the machine list, and
then spawn child threads to do the creation and destruction
of machines as necessary.
"""
self.lock.acquire()
if vm.name not in self.machines:
self.machines.set(vm.name, [[], TangoQueue(vm.name)])
self.log.debug("Creating empty pool of %s instances" % (vm.name))
self.lock.release()
delta = num - len(self.machines.get(vm.name)[0])
if delta > 0:
# We need more self.machines, spin them up.
self.log.debug("update: Creating %d new %s instances" %
(delta, vm.name))
threading.Thread(target=self.__create(vm, delta)).start()
elif delta < 0:
# We have too many self.machines, remove them from the pool
self.log.debug("update: Destroying %d preallocated %s instances" %
(-delta, vm.name))
for i in range(-1 * delta):
threading.Thread(target=self.__destroy(vm)).start()
# If delta == 0 then we are the perfect number!
def allocVM(self, vmName):
""" allocVM - Allocate a VM from the free list
"""
vm = None
if vmName in self.machines:
self.lock.acquire()
if not self.machines.get(vmName)[1].empty():
vm = self.machines.get(vmName)[1].get_nowait()
self.lock.release()
# If we're not reusing instances, then crank up a replacement
if vm and not Config.REUSE_VMS:
threading.Thread(target=self.__create(vm, 1)).start()
return vm
def freeVM(self, vm):
""" freeVM - Returns a VM instance to the free list
"""
# Sanity check: Return a VM to the free list only if it is
# still a member of the pool.
not_found = False
self.lock.acquire()
if vm and vm.id in self.machines.get(vm.name)[0]:
machine = self.machines.get(vm.name)
machine[1].put(vm)
self.machines.set(vm.name, machine)
else:
not_found = True
self.lock.release()
# The VM is no longer in the pool.
if not_found:
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(vm)
def addVM(self, vm):
""" addVM - add a particular VM instance to the pool
"""
self.lock.acquire()
machine = self.machines.get(vm.name)
machine[0].append(vm.id)
self.machines.set(vm.name, machine)
self.lock.release()
def removeVM(self, vm):
""" removeVM - remove a particular VM instance from the pool
"""
self.lock.acquire()
machine = self.machines.get(vm.name)
machine[0].remove(vm.id)
self.machines.set(vm.name, machine)
self.lock.release()
def _getNextID(self):
""" _getNextID - returns next ID to be used for a preallocated
VM. Preallocated VM's have 4-digit ID numbers between 1000
and 9999.
"""
self.lock.acquire()
id = self.nextID.get()
self.nextID.increment()
if self.nextID.get() > 9999:
self.nextID.set(1000)
self.lock.release()
return id
def __create(self, vm, cnt):
""" __create - Creates count VMs and adds them to the pool
This function should always be called in a thread since it
might take a long time to complete.
"""
vmms = self.vmms[vm.vmms]
self.log.debug("__create: Using VMMS %s " % (Config.VMMS_NAME))
for i in range(cnt):
newVM = copy.deepcopy(vm)
newVM.id = self._getNextID()
self.log.debug("__create|calling initializeVM")
vmms.initializeVM(newVM)
self.log.debug("__create|done with initializeVM")
time.sleep(Config.CREATEVM_SECS)
self.addVM(newVM)
self.freeVM(newVM)
self.log.debug("__create: Added vm %s to pool %s " %
(newVM.id, newVM.name))
def __destroy(self, vm):
""" __destroy - Removes a VM from the pool
If the user asks for fewer preallocated VMs, then we will
remove some excess ones. This function should be called in a
thread context. Notice that we can only remove a free vm, so
it's possible we might not be able to satisfy the request if
the free list is empty.
"""
self.lock.acquire()
dieVM = self.machines.get(vm.name)[1].get_nowait()
self.lock.release()
if dieVM:
self.removeVM(dieVM)
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(dieVM)
def createVM(self, vm):
""" createVM - Called in non-thread context to create a single
VM and add it to the pool
"""
vmms = self.vmms[vm.vmms]
newVM = copy.deepcopy(vm)
newVM.id = self._getNextID()
self.log.info("createVM|calling initializeVM")
vmms.initializeVM(newVM)
self.log.info("createVM|done with initializeVM")
self.addVM(newVM)
self.freeVM(newVM)
self.log.debug("createVM: Added vm %s to pool %s" %
(newVM.id, newVM.name))
def destroyVM(self, vmName, id):
""" destroyVM - Called by the delVM API function to remove and
destroy a particular VM instance from a pool. We only allow
this function when the system is queiscent (pool size == free
size)
"""
if vmName not in self.machines:
return -1
dieVM = None
self.lock.acquire()
size = self.machines.get(vmName)[1].qsize()
if (size == len(self.machines.get(vmName)[0])):
for i in range(size):
vm = self.machines.get(vmName)[1].get_nowait()
if vm.id != id:
self.machines.get(vmName)[1].put(vm)
else:
dieVM = vm
self.lock.release()
if dieVM:
self.removeVM(dieVM)
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(dieVM)
return 0
else:
return -1
def getAllPools(self):
result = {}
for vmName in self.machines:
result[vmName] = self.getPool(vmName)
return result
def getPool(self, vmName):
""" getPool - returns the members of a pool and its free list
"""
result = {}
if vmName not in self.machines:
return result
result["total"] = []
result["free"] = []
free_list = []
self.lock.acquire()
size = self.machines.get(vmName)[1].qsize()
for i in range(size):
vm = self.machines.get(vmName)[1].get_nowait()
free_list.append(vm.id)
machine = self.machines.get(vmName)
machine[1].put(vm)
self.machines.set(vmName, machine)
self.lock.release()
result["total"] = self.machines.get(vmName)[0]
result["free"] = free_list
return result
class Preallocator:
def __init__(self, vmms):
self.machines = TangoDictionary("machines")
self.lock = threading.Lock()
self.nextID = TangoIntValue("nextID", 1000)
self.vmms = vmms
self.log = logging.getLogger("Preallocator-" + str(os.getpid()))
self.low_water_mark = TangoIntValue("low_water_mark", -1)
if (hasattr(Config, 'POOL_SIZE_LOW_WATER_MARK')
and Config.POOL_SIZE_LOW_WATER_MARK >= 0):
self.low_water_mark.set(Config.POOL_SIZE_LOW_WATER_MARK)
def poolSize(self, vmName):
""" poolSize - returns the size of the vmName pool, for external callers
"""
if vmName not in self.machines.keys():
return 0
else:
return len(self.machines.get(vmName)[0])
def freePoolSize(self, vmName):
""" freePoolSize - returns the size of the vmName free pool, for external callers
"""
if vmName in self.machines.keys():
return self.machines.get(vmName)[1].qsize()
else:
return 0
def incrementPoolSize(self, vm, delta):
"""
Called by jobQueue to create the pool and allcoate given number of vms
"""
self.log.debug("incrementPoolSize| acquiring lock on preallocator")
with self.lock:
self.log.debug("incrementPoolSize| acquired lock on preallocator")
if vm.name not in self.machines.keys():
self.machines.set(vm.name, [[], TangoQueue(vm.name)])
# see comments in jobManager.py for the same call
self.machines.get(vm.name)[1].make_empty()
self.log.debug("Creating empty pool of %s instances" %
(vm.name))
self.log.debug("incrementPoolSize| released lock on preallocator")
self.log.debug("incrementPoolSize: add %d new %s instances" %
(delta, vm.name))
threading.Thread(target=self.__create(vm, delta)).start()
def update(self, vm, num):
""" update - Updates the number of machines of a certain type
to be preallocated.
This function is called via the TangoServer HTTP interface.
It will validate the request,update the machine list, and
then spawn child threads to do the creation and destruction
of machines as necessary.
"""
self.log.debug("update| acquiring lock on preallocator")
with self.lock:
self.log.debug("update| acquired lock on preallocator")
if vm.name not in self.machines.keys():
self.machines.set(vm.name, [[], TangoQueue(vm.name)])
# see comments in jobManager.py for the same call
self.machines.get(vm.name)[1].make_empty()
self.log.debug("Creating empty pool of %s instances" %
(vm.name))
self.log.debug("update| released lock on preallocator")
delta = num - len(self.machines.get(vm.name)[0])
if delta > 0:
# We need more self.machines, spin them up.
self.log.debug("update: Creating %d new %s instances" %
(delta, vm.name))
threading.Thread(target=self.__create(vm, delta)).start()
elif delta < 0:
# We have too many self.machines, remove them from the pool
self.log.debug("update: Destroying %d preallocated %s instances" %
(-delta, vm.name))
for i in range(-1 * delta):
threading.Thread(target=self.__destroy(vm)).start()
# If delta == 0 then we are the perfect number!
def allocVM(self, vmName):
""" allocVM - Allocate a VM from the free list
"""
vm = None
if vmName in self.machines.keys():
self.log.debug("allocVM| acquiring lock on preallocator")
with self.lock:
self.log.debug("allocVM| acquired lock on preallocator")
if not self.machines.get(vmName)[1].empty():
self.log.debug("allocVM| getting (nowait)")
vm = self.machines.get(vmName)[1].get_nowait()
self.log.debug("allocVM| got (nowait)")
self.log.debug("allocVM| released lock on " + vmName)
# If we're not reusing instances, then crank up a replacement
if vm and not Config.REUSE_VMS:
threading.Thread(target=self.__create(vm, 1)).start()
return vm
def addToFreePool(self, vm):
""" addToFreePool - Returns a VM instance to the free list
"""
self.log.debug("addToFreePool| acquiring lock on preallocator")
with self.lock:
self.log.debug("addToFreePool| acquired lock on preallocator")
machine = self.machines.get(vm.name)
self.log.info("addToFreePool: add %s to free pool" % vm.id)
machine[1].put(vm)
self.machines.set(vm.name, machine)
self.log.debug("addToFreePool| released lock on preallocator")
def freeVM(self, vm, jobQueue):
""" freeVM - Returns a VM instance to the free list
"""
# Sanity check: Return a VM to the free list only if it is
# still a member of the pool.
not_found = False
should_destroy = False
# We must access jobQueue prior to acquiring the preallocator lock,
# since otherwise we may have deadlock. (In other places in the codebase,
# we acquire the lock on the jobQueue and THEN the lock on the
# preallocator.)
self.log.debug("freeVM| acquiring lock on jobQueue")
with jobQueue.queueLock:
self.log.debug("freeVM| acquired lock on jobQueue")
numReadyJobs = jobQueue.numReadyJobsUnsafe()
self.log.debug("freeVM| acquiring lock on preallocator")
with self.lock:
self.log.debug("freeVM| acquired lock on preallocator")
if vm and vm.id in self.machines.get(vm.name)[0]:
lwm = self.low_water_mark.get()
if (lwm >= 0 and vm.name in self.machines.keys() and
self.freePoolSize(vm.name) - numReadyJobs >= lwm):
self.log.info(
"freeVM: over low water mark (%d). will destroy %s"
% (lwm, vm.id))
should_destroy = True
else:
machine = self.machines.get(vm.name)
self.log.info("freeVM: return %s to free pool" % vm.id)
machine[1].put(vm)
self.machines.set(vm.name, machine)
else:
self.log.info(
"freeVM: not found in pool %s. will destroy %s" %
(vm.name, vm.id))
not_found = True
self.log.debug("freeVM| released lock on preallocator")
self.log.debug("freeVM| released lock on jobQueue")
# The VM is no longer in the pool.
if not_found or should_destroy:
self.log.info("freeVM: will destroy %s" % vm.id)
vmms = self.vmms[vm.vmms]
self.removeVM(vm)
vmms.safeDestroyVM(vm)
def addVM(self, vm):
""" addVM - add a particular VM instance to the pool
"""
self.log.debug("addVM| acquiring lock on preallocator")
with self.lock:
self.log.debug("addVM| acquired lock on preallocator")
machine = self.machines.get(vm.name)
machine[0].append(vm.id)
self.log.info("addVM: add %s" % vm.id)
self.machines.set(vm.name, machine)
self.log.debug("addVM| released lock on preallocator")
# Note: This function is called from removeVM() to handle the case when a vm
# is in free pool. In theory this should never happen but we want to ensure
# that. To solve the problem cleanly, preallocator should provide ONE primitive
# to add/remove a vm from both total and free pools, instead of two disjoint ones.
def removeFromFreePool(self, vm):
dieVM = None
self.log.debug("removeFromFreePool| acquiring lock on preallocator")
with self.lock:
self.log.debug("removeFromFreePool| acquired lock on preallocator")
size = self.machines.get(vm.name)[1].qsize()
self.log.info("removeFromFreePool: %s in pool %s" %
(vm.id, vm.name))
for i in range(size): # go through free pool
vm = self.machines.get(vm.name)[1].get_nowait()
# put it back into free pool, if not our vm
if vm.id != id:
self.machines.get(vm.name)[1].put(vm)
else:
self.log.info("removeFromFreePool: found %s in pool %s" %
(vm.id, vm.name))
# don't put this particular vm back to free pool, that is removal
self.log.debug("removeFromFreePool| released lock on preallocator")
def removeVM(self, vm):
""" removeVM - remove a particular VM instance from the pool
"""
self.log.debug("removeVM| acquiring lock on preallocator")
with self.lock:
self.log.debug("removeVM| acquired lock on preallocator")
machine = self.machines.get(vm.name)
if vm.id not in machine[0]:
self.log.error("removeVM: %s NOT found in pool" %
(vm.id, vm.name))
return
self.log.info("removeVM: %s" % vm.id)
machine[0].remove(vm.id)
self.machines.set(vm.name, machine)
self.log.debug("removeVM| released lock on preallocator")
self.removeFromFreePool(vm) # also remove from free pool, just in case
def _getNextID(self):
""" _getNextID - returns next ID to be used for a preallocated
VM. Preallocated VM's have 4-digit ID numbers between 1000
and 9999.
"""
self.log.debug("_getNextID| acquiring lock on preallocator")
with self.lock:
self.log.debug("_getNextID| acquired lock on preallocator")
id = self.nextID.get()
self.nextID.increment()
if self.nextID.get() > 9999:
self.nextID.set(1000)
self.log.debug("_getNextID| released lock on preallocator")
return id
def __create(self, vm, cnt):
""" __create - Creates count VMs and adds them to the pool
This function should always be called in a thread since it
might take a long time to complete.
"""
vmms = self.vmms[vm.vmms]
self.log.debug("__create: Using VMMS %s " % (Config.VMMS_NAME))
for i in range(cnt):
newVM = copy.deepcopy(vm)
newVM.id = self._getNextID()
self.log.debug("__create|calling initializeVM")
ret = vmms.initializeVM(newVM)
if not ret: # ret is None when fails
self.log.debug("__create|failed initializeVM")
continue
self.log.debug("__create|done with initializeVM")
time.sleep(Config.CREATEVM_SECS)
self.addVM(newVM)
self.addToFreePool(newVM)
self.log.debug("__create: Added vm %s to pool %s " %
(newVM.id, newVM.name))
def __destroy(self, vm):
""" __destroy - Removes a VM from the pool
If the user asks for fewer preallocated VMs, then we will
remove some excess ones. This function should be called in a
thread context. Notice that we can only remove a free vm, so
it's possible we might not be able to satisfy the request if
the free list is empty.
"""
self.log.debug("__destroy| acquiring lock on preallocator")
with self.lock:
self.log.debug("__destroy| acquired lock on preallocator")
dieVM = self.machines.get(vm.name)[1].get_nowait()
self.log.debug("__destroy| released lock on preallocator")
if dieVM:
self.log.info("__destroy: %s" % dieVM.id)
self.removeVM(dieVM)
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(dieVM)
def createVM(self, vm):
""" createVM - Called in non-thread context to create a single
VM and add it to the pool
"""
vmms = self.vmms[vm.vmms]
newVM = copy.deepcopy(vm)
newVM.id = self._getNextID()
self.log.info("createVM|calling initializeVM")
ret = vmms.initializeVM(newVM)
if not ret:
self.log.debug("createVM|failed initializeVM")
return
self.log.info("createVM|done with initializeVM %s" % newVM.id)
self.addVM(newVM)
self.addToFreePool(newVM)
self.log.debug("createVM: Added vm %s to pool %s" %
(newVM.id, newVM.name))
def destroyVM(self, vmName, id):
""" destroyVM - Called by the delVM API function to remove and
destroy a particular VM instance from a pool. We only allow
this function when the system is queiscent (pool size == free
size)
"""
if vmName not in self.machines.keys():
return -1
dieVM = None
self.log.debug("destroyVM| acquiring lock on preallocator")
with self.lock:
self.log.debug("destroyVM| acquired lock on preallocator")
size = self.machines.get(vmName)[1].qsize()
self.log.info("destroyVM: free:total pool %d:%d" %
(size, len(self.machines.get(vmName)[0])))
if (size == len(self.machines.get(vmName)[0])):
for i in range(size):
vm = self.machines.get(vmName)[1].get_nowait()
if vm.id != id:
self.log.info(
"destroyVM: put to free pool id:vm.id %s:%s" %
(id, vm.id))
self.machines.get(vmName)[1].put(vm)
else:
self.log.info("destroyVM: will call removeVM %s" % id)
dieVM = vm
self.log.debug("destroyVM| released lock on preallocator")
if dieVM:
self.removeVM(dieVM)
vmms = self.vmms[vm.vmms]
vmms.safeDestroyVM(dieVM)
return 0
else:
return -1
def getAllPools(self):
result = {}
for vmName in self.machines.keys():
result[vmName] = self.getPool(vmName)
return result
def getPool(self, vmName):
""" getPool - returns the members of a pool and its free list
"""
result = {}
if vmName not in self.machines.keys():
return result
result["total"] = []
result["free"] = []
free_list = []
self.log.debug("getPool| acquiring lock on preallocator")
with self.lock:
self.log.debug("getPool| acquired lock on preallocator")
size = self.machines.get(vmName)[1].qsize()
for i in range(size):
vm = self.machines.get(vmName)[1].get_nowait()
free_list.append(vm.id)
machine = self.machines.get(vmName)
machine[1].put(vm)
self.machines.set(vmName, machine)
self.log.debug("getPool| released lock on preallocator")
result["total"] = self.machines.get(vmName)[0]
result["free"] = free_list
self.log.info("getPool: free pool %s" %
', '.join(str(x) for x in result["free"]))
self.log.info("getPool: total pool %s" %
', '.join(str(x) for x in result["total"]))
return result
