def __connectToDatabases(self, databaseName, user, password):
"""
Establishes the connection with the database
Args:
databaseName: a database name
user: a SQL username
password: the user's password
Returns:
Nothing
"""
self.__commandsDBConnector = VMServerDBConnector(
user, password, databaseName)
def __connectToDatabases(self, databaseName, user, password) :
"""
Establishes the connection with the database
Args:
databaseName: a database name
user: a SQL username
password: the user's password
Returns:
Nothing
"""
self.__commandsDBConnector = VMServerDBConnector(user, password, databaseName)
class VMServerReactor(NetworkCallback):
"""
Virtual machine server packet reactor
"""
def __init__(self, configurationFileParser):
"""
Initializes the reactor's state, establishes the connection with the database
and creates the control connection
Args:
configurationFileParser: the virtual machine server's configuration file parser
"""
self.__finished = False
self.__emergencyStop = False
self.__fileTransferThread = None
self.__compressionThread = None
self.__networkManager = None
self.__parser = configurationFileParser
self.__domainHandler = None
self.__domainTimeout = 0
try :
self.__connectToDatabases("VMServerDB", self.__parser.getConfigurationParameter("databaseUserName"),
self.__parser.getConfigurationParameter("databasePassword"))
self.__startListenning()
except Exception as e:
print e.message
self.__emergencyStop = True
self.__finished = True
def __connectToDatabases(self, databaseName, user, password) :
"""
Establishes the connection with the database
Args:
databaseName: a database name
user: a SQL username
password: the user's password
Returns:
Nothing
"""
self.__commandsDBConnector = VMServerDBConnector(user, password, databaseName)
def __startListenning(self):
"""
Creates the control connection
Args:
None
Returns:
Nothing
"""
networkInterface = self.__parser.getConfigurationParameter("vncNetworkInterface")
listenningPort = self.__parser.getConfigurationParameter("listenningPort")
try :
self.__vncServerIP = get_ip_address(networkInterface)
except Exception :
raise Exception("Error: the network interface '{0}' is not ready. Exiting now".format(networkInterface))
self.__ftpTimeout = self.__parser.getConfigurationParameter("FTPTimeout")
self.__listenningPort = listenningPort
self.__networkManager = NetworkManager(self.__parser.getConfigurationParameter("certificatePath"))
self.__networkManager.startNetworkService()
self.__useSSL = self.__parser.getConfigurationParameter("useSSL")
self.__packetManager = VMServerPacketHandler(self.__networkManager)
self.__connectToDatabases("VMServerDB", self.__parser.getConfigurationParameter("databaseUserName"), self.__parser.getConfigurationParameter("databasePassword"))
self.__domainHandler = DomainHandler(self.__commandsDBConnector, self.__vncServerIP, self.__networkManager, self.__packetManager, self.__listenningPort,
self.__parser.getConfigurationParameter("useQEMUWebsockets"),
self.__parser.getConfigurationParameter("websockifyPath"),
self.__parser.getConfigurationParameter("configFilePath"),
self.__parser.getConfigurationParameter("sourceImagePath"), self.__parser.getConfigurationParameter("executionImagePath"),
self.__parser.getConfigurationParameter("passwordLength"))
self.__domainHandler.connectToLibvirt(self.__parser.getConfigurationParameter("vncNetworkInterface"),
self.__parser.getConfigurationParameter("vnName"), self.__parser.getConfigurationParameter("gatewayIP"),
self.__parser.getConfigurationParameter("netMask"), self.__parser.getConfigurationParameter("dhcpStartIP"),
self.__parser.getConfigurationParameter("dhcpEndIP"), self.__parser.getConfigurationParameter("createVirtualNetworkAsRoot"))
self.__domainHandler.doInitialCleanup()
self.__deleteTemporaryZipFiles()
self.__fileTransferThread = FileTransferThread(self.__networkManager, self.__listenningPort, self.__packetManager,
self.__parser.getConfigurationParameter("TransferDirectory"),
self.__parser.getConfigurationParameter("FTPTimeout"),
self.__parser.getConfigurationParameter("MaxTransferAttempts"), self.__commandsDBConnector, self.__useSSL)
self.__compressionThread = CompressionThread(self.__parser.getConfigurationParameter("TransferDirectory"), self.__parser.getConfigurationParameter("sourceImagePath"),
self.__parser.getConfigurationParameter("configFilePath"),
self.__commandsDBConnector, self.__domainHandler, self.__networkManager, self.__listenningPort, self.__packetManager)
self.__fileTransferThread.start()
self.__compressionThread.start()
self.__networkManager.listenIn(self.__listenningPort, self, self.__useSSL)
def __deleteTemporaryZipFiles(self):
"""
Deletes the temporary zip files
Args:
None
Returns:
Nothing
"""
transfer_dir_path = self.__parser.getConfigurationParameter("TransferDirectory")
for filePath in os.listdir(transfer_dir_path) :
fileName = os.path.splitext(filePath)[0]
if re.match("[^0-9]", fileName):
# The non-temporary zip files only have numbers on their names
os.remove(os.path.join(transfer_dir_path, filePath))
def shutdown(self):
"""
Shuts down the virtual machine server
Args:
None
Returns:
Nothing
"""
if (self.__emergencyStop) :
self.__domainTimeout = 0
self.__domainHandler.shutdown(self.__domainTimeout)
if (self.__fileTransferThread != None) :
self.__fileTransferThread.stop()
self.__fileTransferThread.join()
if (self.__compressionThread != None) :
self.__compressionThread.stop()
self.__compressionThread.join()
if (self.__networkManager != None) :
self.__networkManager.stopNetworkService() # Dejar de atender peticiones inmediatamente
sys.exit()
def processPacket(self, packet):
"""
Processes a packet sent from the cluster server
Args:
packet: the packet to process
Returns:
Nothing
"""
data = self.__packetManager.readPacket(packet)
if (data["packet_type"] == VM_SERVER_PACKET_T.CREATE_DOMAIN) :
self.__domainHandler.createDomain(data["MachineID"], data["UserID"], data["CommandID"])
elif (data["packet_type"] == VM_SERVER_PACKET_T.SERVER_STATUS_REQUEST) :
self.__sendStatusData()
elif (data["packet_type"] == VM_SERVER_PACKET_T.USER_FRIENDLY_SHUTDOWN) :
self.__domainTimeout = data["Timeout"]
self.__finished = True
elif (data["packet_type"] == VM_SERVER_PACKET_T.HALT) :
self.__domainTimeout = 0
self.__finished = True
elif (data['packet_type'] == VM_SERVER_PACKET_T.QUERY_ACTIVE_VM_DATA) :
self.__sendDomainsVNCConnectionData()
elif (data['packet_type'] == VM_SERVER_PACKET_T.DESTROY_DOMAIN) :
self.__domainHandler.destroyDomain(data["DomainID"])
elif (data['packet_type'] == VM_SERVER_PACKET_T.REBOOT_DOMAIN) :
self.__domainHandler.rebootDomain(data["DomainID"])
elif (data['packet_type'] == VM_SERVER_PACKET_T.QUERY_ACTIVE_DOMAIN_UIDS) :
self.__sendActiveDomainUIDs()
elif (data['packet_type'] == VM_SERVER_PACKET_T.IMAGE_EDITION) :
self.__processImageEditionPacket(data)
elif (data['packet_type'] == VM_SERVER_PACKET_T.DEPLOY_IMAGE) :
self.__processDeployImagePacket(data)
elif (data['packet_type'] == VM_SERVER_PACKET_T.DELETE_IMAGE) :
self.__processDeleteImagePacket(data)
def __processDeployImagePacket(self, data):
"""
Processes an image deployment packet
Args:
data: a dictionary containing the packet to process' data
Returns:
Nothing
"""
data.pop("packet_type")
data["Transfer_Type"] = TRANSFER_T.DEPLOY_IMAGE
self.__commandsDBConnector.addToTransferQueue(data)
def __processDeleteImagePacket(self, data):
isBootable = self.__commandsDBConnector.getBootableFlag(data["ImageID"])
if(isBootable):
osImagePath = os.path.join(self.__parser.getConfigurationParameter("sourceImagePath")
,self.__commandsDBConnector.getOSImagePath(data["ImageID"]))
definitionFilePath = os.path.join(self.__parser.getConfigurationParameter("configFilePath")
,self.__commandsDBConnector.getDefinitionFilePath(data["ImageID"]))
try :
self.__commandsDBConnector.deleteImage(data["ImageID"])
ChildProcessManager.runCommandInForeground("rm -rf " + os.path.dirname(osImagePath), VMServerException)
ChildProcessManager.runCommandInForeground("rm -rf " + os.path.dirname(definitionFilePath), VMServerException)
p = self.__packetManager.createConfirmationPacket(VM_SERVER_PACKET_T.IMAGE_DELETED, data["ImageID"], data["CommandID"])
except Exception:
p = self.__packetManager.createErrorPacket(VM_SERVER_PACKET_T.IMAGE_DELETION_ERROR, ERROR_DESC_T.VM_SRVR_INTERNAL_ERROR,
data["CommandID"])
else:
if (isBootable != None) :
errorCode = ERROR_DESC_T.VMSRVR_LOCKED_IMAGE
else :
errorCode = ERROR_DESC_T.VMSRVR_UNKNOWN_IMAGE
p = self.__packetManager.createErrorPacket(VM_SERVER_PACKET_T.IMAGE_DELETION_ERROR, errorCode,
data["CommandID"])
self.__networkManager.sendPacket('', self.__listenningPort, p)
def __processImageEditionPacket(self, data):
"""
Processes an image edition packet
Args:
data: a dictionary containing the packet to process' data
Returns:
Nothing
"""
data.pop("packet_type")
if (data["Modify"]) :
data["Transfer_Type"] = TRANSFER_T.EDIT_IMAGE
else :
data["Transfer_Type"] = TRANSFER_T.CREATE_IMAGE
data.pop("Modify")
self.__commandsDBConnector.addToTransferQueue(data)
def __sendDomainsVNCConnectionData(self):
'''
Sends the domains' VNC connection data to the cluster server
Args:
None
Returns:
Nothing
'''
vncConnectionData = self.__commandsDBConnector.getDomainsConnectionData()
segmentSize = 150
segmentCounter = 1
outgoingData = []
if (len(vncConnectionData) == 0):
segmentCounter = 0
segmentNumber = (len(vncConnectionData) / segmentSize)
if (len(vncConnectionData) % segmentSize != 0) :
segmentNumber += 1
sendLastSegment = True
else :
sendLastSegment = segmentNumber == 0
for connectionParameters in vncConnectionData :
outgoingData.append(connectionParameters)
if (len(outgoingData) >= segmentSize) :
# Flush
packet = self.__packetManager.createActiveVMsVNCDataPacket(self.__vncServerIP, segmentCounter, segmentNumber, outgoingData)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
outgoingData = []
segmentCounter += 1
# Send the last segment
if (sendLastSegment) :
packet = self.__packetManager.createActiveVMsVNCDataPacket(self.__vncServerIP, segmentCounter, segmentNumber, outgoingData)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
def __sendStatusData(self):
"""
Sends the server's status data to the cluster server
Args:
None
Returns:
Nothing
"""
info = self.__domainHandler.getLibvirtStatusData()
realCPUNumber = multiprocessing.cpu_count()
freeOutput = ChildProcessManager.runCommandInForeground("free -k", VMServerException)
# free's output contains the following lines and collumns:
# total used free shared buffers cached
# Mem: 4146708480 3939934208 206774272 0 224706560 1117671424
# -/+ buffers/cache: 2597556224 1549152256
# Swap: 2046816256 42455040 2004361216
#
# We must get the third line
availableMemory = int(freeOutput.split("\n")[1].split()[1])
freeMemory = int(freeOutput.split("\n")[2].split()[2])
freeStorageSpace, availableStorageSpace, freeTemporaryStorage, availableTemporaryStorage = self.__generateDiskStats()
packet = self.__packetManager.createVMServerStatusPacket(self.__vncServerIP, info["#domains"], freeMemory, availableMemory,
freeStorageSpace, availableStorageSpace,
freeTemporaryStorage, availableTemporaryStorage,
info["#vcpus"], realCPUNumber)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
def __generateDiskStats(self):
"""
Generates the hard disk usage statistics
Args:
None
Returns:
the free and available storage and temporary space
"""
diskStats_storage = os.statvfs(self.__parser.getConfigurationParameter("sourceImagePath"))
diskStats_temporaryData = os.statvfs(self.__parser.getConfigurationParameter("executionImagePath"))
allocatedStorageSpace, allocatedTemporaryStorageSpace = self.__checkDiskImagesSpace()
freeStorageSpace = diskStats_storage.f_bfree * diskStats_storage.f_frsize / 1024 - allocatedStorageSpace
availableStorageSpace = diskStats_storage.f_blocks * diskStats_storage.f_frsize / 1024
freeTemporaryStorageSpace = diskStats_temporaryData.f_bfree * diskStats_temporaryData.f_frsize / 1024 - allocatedTemporaryStorageSpace
availableTemporaryStorageSpace = diskStats_temporaryData.f_blocks * diskStats_temporaryData.f_frsize / 1024
return freeStorageSpace, availableStorageSpace, freeTemporaryStorageSpace, availableTemporaryStorageSpace
def __checkDiskImagesSpace(self):
"""
Checks how much disk space must be allocated for the active virtual machines' disk images
Args:
None
Returns:
the storage and temporary storage space that must be allocated.
"""
activeDomainNames = self.__commandsDBConnector.getRegisteredDomainNames()
allocatedStorageSpace = 0
allocatedTemporaryStorageSpace = 0
for domainName in activeDomainNames:
imageID = self.__commandsDBConnector.getDomainImageID(domainName)
if (imageID == None) :
return 0, 0
dataImagePath = self.__commandsDBConnector.getDomainDataImagePath(domainName)
if (dataImagePath == None) :
return 0, 0
osImagePath = self.__commandsDBConnector.getDomainOSImagePath(domainName)
if (osImagePath == None):
return 0, 0
isEditedImage = self.__commandsDBConnector.getBootableFlag(imageID)
if (isEditedImage == None):
return 0, 0
dataSpace = self.__getAllocatedSpace(dataImagePath)
if (isEditedImage) :
osSpace = self.__getAllocatedSpace(osImagePath)
allocatedStorageSpace += osSpace + dataSpace
else :
allocatedTemporaryStorageSpace += dataSpace
return allocatedStorageSpace, allocatedTemporaryStorageSpace
def __getAllocatedSpace(self, imagePath):
"""
Returns the disk space that must be allocated for a disk image
Args:
imagePath: the disk image's path
Returns:
Nothing
"""
try :
output = ChildProcessManager.runCommandInForeground("qemu-img info " + imagePath, Exception)
lines = output.split("\n")
virtualSize = VMServerReactor.__extractImageSize(lines[2].split(":")[1].split("(")[0])
usedSpace = VMServerReactor.__extractImageSize(lines[3].split(":")[1])
return virtualSize - usedSpace
except Exception as e:
print e
return 0
@staticmethod
def __extractImageSize(string):
"""
Extracts an image size from a quemu-img command output.
Args:
string: the qemu-img command's image size
Returns:
the disk image size (in kilobytes)
"""
if ("G" in string) :
power = 2
elif ("M" in string):
power = 1
else:
power = 0
string = string.replace("G", "")
string = string.replace("M", "")
string = string.replace("K", "")
return int(ceil(float(string))) * 1024 ** power
def __sendActiveDomainUIDs(self):
"""
Sends domains' UUIDs to the cluster server
Args:
None
Returns:
Nothing
"""
activeDomainUIDs = self.__commandsDBConnector.getActiveDomainUIDs()
packet = self.__packetManager.createActiveDomainUIDsPacket(self.__vncServerIP, activeDomainUIDs)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
def has_finished(self):
"""
Checks if the virtual machine server has been shut down or not
Args:
None
Returns:
Nothing
"""
return self.__finished
class VMServerReactor(NetworkCallback):
"""
Virtual machine server packet reactor
"""
def __init__(self, configurationFileParser):
"""
Initializes the reactor's state, establishes the connection with the database
and creates the control connection
Args:
configurationFileParser: the virtual machine server's configuration file parser
"""
self.__finished = False
self.__emergencyStop = False
self.__fileTransferThread = None
self.__compressionThread = None
self.__networkManager = None
self.__parser = configurationFileParser
self.__domainHandler = None
self.__domainTimeout = 0
try:
self.__connectToDatabases(
"VMServerDB",
self.__parser.getConfigurationParameter("databaseUserName"),
self.__parser.getConfigurationParameter("databasePassword"))
self.__startListenning()
except Exception as e:
print e.message
self.__emergencyStop = True
self.__finished = True
def __connectToDatabases(self, databaseName, user, password):
"""
Establishes the connection with the database
Args:
databaseName: a database name
user: a SQL username
password: the user's password
Returns:
Nothing
"""
self.__commandsDBConnector = VMServerDBConnector(
user, password, databaseName)
def __startListenning(self):
"""
Creates the control connection
Args:
None
Returns:
Nothing
"""
networkInterface = self.__parser.getConfigurationParameter(
"vncNetworkInterface")
listenningPort = self.__parser.getConfigurationParameter(
"listenningPort")
try:
self.__vncServerIP = get_ip_address(networkInterface)
except Exception:
raise Exception(
"Error: the network interface '{0}' is not ready. Exiting now".
format(networkInterface))
self.__ftpTimeout = self.__parser.getConfigurationParameter(
"FTPTimeout")
self.__listenningPort = listenningPort
self.__networkManager = NetworkManager(
self.__parser.getConfigurationParameter("certificatePath"))
self.__networkManager.startNetworkService()
self.__useSSL = self.__parser.getConfigurationParameter("useSSL")
self.__packetManager = VMServerPacketHandler(self.__networkManager)
self.__connectToDatabases(
"VMServerDB",
self.__parser.getConfigurationParameter("databaseUserName"),
self.__parser.getConfigurationParameter("databasePassword"))
self.__domainHandler = DomainHandler(
self.__commandsDBConnector, self.__vncServerIP,
self.__networkManager, self.__packetManager, self.__listenningPort,
self.__parser.getConfigurationParameter("useQEMUWebsockets"),
self.__parser.getConfigurationParameter("websockifyPath"),
self.__parser.getConfigurationParameter("configFilePath"),
self.__parser.getConfigurationParameter("sourceImagePath"),
self.__parser.getConfigurationParameter("executionImagePath"),
self.__parser.getConfigurationParameter("passwordLength"))
self.__domainHandler.connectToLibvirt(
self.__parser.getConfigurationParameter("vncNetworkInterface"),
self.__parser.getConfigurationParameter("vnName"),
self.__parser.getConfigurationParameter("gatewayIP"),
self.__parser.getConfigurationParameter("netMask"),
self.__parser.getConfigurationParameter("dhcpStartIP"),
self.__parser.getConfigurationParameter("dhcpEndIP"),
self.__parser.getConfigurationParameter(
"createVirtualNetworkAsRoot"))
self.__domainHandler.doInitialCleanup()
self.__deleteTemporaryZipFiles()
self.__fileTransferThread = FileTransferThread(
self.__networkManager, self.__listenningPort, self.__packetManager,
self.__parser.getConfigurationParameter("TransferDirectory"),
self.__parser.getConfigurationParameter("FTPTimeout"),
self.__parser.getConfigurationParameter("MaxTransferAttempts"),
self.__commandsDBConnector, self.__useSSL)
self.__compressionThread = CompressionThread(
self.__parser.getConfigurationParameter("TransferDirectory"),
self.__parser.getConfigurationParameter("sourceImagePath"),
self.__parser.getConfigurationParameter("configFilePath"),
self.__commandsDBConnector, self.__domainHandler,
self.__networkManager, self.__listenningPort, self.__packetManager)
self.__fileTransferThread.start()
self.__compressionThread.start()
self.__networkManager.listenIn(self.__listenningPort, self,
self.__useSSL)
def __deleteTemporaryZipFiles(self):
"""
Deletes the temporary zip files
Args:
None
Returns:
Nothing
"""
transfer_dir_path = self.__parser.getConfigurationParameter(
"TransferDirectory")
for filePath in os.listdir(transfer_dir_path):
fileName = os.path.splitext(filePath)[0]
if re.match("[^0-9]", fileName):
# The non-temporary zip files only have numbers on their names
os.remove(os.path.join(transfer_dir_path, filePath))
def shutdown(self):
"""
Shuts down the virtual machine server
Args:
None
Returns:
Nothing
"""
if (self.__emergencyStop):
self.__domainTimeout = 0
self.__domainHandler.shutdown(self.__domainTimeout)
if (self.__fileTransferThread != None):
self.__fileTransferThread.stop()
self.__fileTransferThread.join()
if (self.__compressionThread != None):
self.__compressionThread.stop()
self.__compressionThread.join()
if (self.__networkManager != None):
self.__networkManager.stopNetworkService(
) # Dejar de atender peticiones inmediatamente
sys.exit()
def processPacket(self, packet):
"""
Processes a packet sent from the cluster server
Args:
packet: the packet to process
Returns:
Nothing
"""
data = self.__packetManager.readPacket(packet)
if (data["packet_type"] == VM_SERVER_PACKET_T.CREATE_DOMAIN):
self.__domainHandler.createDomain(data["MachineID"],
data["UserID"],
data["CommandID"])
elif (data["packet_type"] == VM_SERVER_PACKET_T.SERVER_STATUS_REQUEST):
self.__sendStatusData()
elif (data["packet_type"] == VM_SERVER_PACKET_T.USER_FRIENDLY_SHUTDOWN
):
self.__domainTimeout = data["Timeout"]
self.__finished = True
elif (data["packet_type"] == VM_SERVER_PACKET_T.HALT):
self.__domainTimeout = 0
self.__finished = True
elif (data['packet_type'] == VM_SERVER_PACKET_T.QUERY_ACTIVE_VM_DATA):
self.__sendDomainsVNCConnectionData()
elif (data['packet_type'] == VM_SERVER_PACKET_T.DESTROY_DOMAIN):
self.__domainHandler.destroyDomain(data["DomainID"])
elif (data['packet_type'] == VM_SERVER_PACKET_T.REBOOT_DOMAIN):
self.__domainHandler.rebootDomain(data["DomainID"])
elif (data['packet_type'] ==
VM_SERVER_PACKET_T.QUERY_ACTIVE_DOMAIN_UIDS):
self.__sendActiveDomainUIDs()
elif (data['packet_type'] == VM_SERVER_PACKET_T.IMAGE_EDITION):
self.__processImageEditionPacket(data)
elif (data['packet_type'] == VM_SERVER_PACKET_T.DEPLOY_IMAGE):
self.__processDeployImagePacket(data)
elif (data['packet_type'] == VM_SERVER_PACKET_T.DELETE_IMAGE):
self.__processDeleteImagePacket(data)
def __processDeployImagePacket(self, data):
"""
Processes an image deployment packet
Args:
data: a dictionary containing the packet to process' data
Returns:
Nothing
"""
data.pop("packet_type")
data["Transfer_Type"] = TRANSFER_T.DEPLOY_IMAGE
self.__commandsDBConnector.addToTransferQueue(data)
def __processDeleteImagePacket(self, data):
isBootable = self.__commandsDBConnector.getBootableFlag(
data["ImageID"])
if (isBootable):
osImagePath = os.path.join(
self.__parser.getConfigurationParameter("sourceImagePath"),
self.__commandsDBConnector.getOSImagePath(data["ImageID"]))
definitionFilePath = os.path.join(
self.__parser.getConfigurationParameter("configFilePath"),
self.__commandsDBConnector.getDefinitionFilePath(
data["ImageID"]))
try:
self.__commandsDBConnector.deleteImage(data["ImageID"])
ChildProcessManager.runCommandInForeground(
"rm -rf " + os.path.dirname(osImagePath),
VMServerException)
ChildProcessManager.runCommandInForeground(
"rm -rf " + os.path.dirname(definitionFilePath),
VMServerException)
p = self.__packetManager.createConfirmationPacket(
VM_SERVER_PACKET_T.IMAGE_DELETED, data["ImageID"],
data["CommandID"])
except Exception:
p = self.__packetManager.createErrorPacket(
VM_SERVER_PACKET_T.IMAGE_DELETION_ERROR,
ERROR_DESC_T.VM_SRVR_INTERNAL_ERROR, data["CommandID"])
else:
if (isBootable != None):
errorCode = ERROR_DESC_T.VMSRVR_LOCKED_IMAGE
else:
errorCode = ERROR_DESC_T.VMSRVR_UNKNOWN_IMAGE
p = self.__packetManager.createErrorPacket(
VM_SERVER_PACKET_T.IMAGE_DELETION_ERROR, errorCode,
data["CommandID"])
self.__networkManager.sendPacket('', self.__listenningPort, p)
def __processImageEditionPacket(self, data):
"""
Processes an image edition packet
Args:
data: a dictionary containing the packet to process' data
Returns:
Nothing
"""
data.pop("packet_type")
if (data["Modify"]):
data["Transfer_Type"] = TRANSFER_T.EDIT_IMAGE
else:
data["Transfer_Type"] = TRANSFER_T.CREATE_IMAGE
data.pop("Modify")
self.__commandsDBConnector.addToTransferQueue(data)
def __sendDomainsVNCConnectionData(self):
'''
Sends the domains' VNC connection data to the cluster server
Args:
None
Returns:
Nothing
'''
vncConnectionData = self.__commandsDBConnector.getDomainsConnectionData(
)
segmentSize = 150
segmentCounter = 1
outgoingData = []
if (len(vncConnectionData) == 0):
segmentCounter = 0
segmentNumber = (len(vncConnectionData) / segmentSize)
if (len(vncConnectionData) % segmentSize != 0):
segmentNumber += 1
sendLastSegment = True
else:
sendLastSegment = segmentNumber == 0
for connectionParameters in vncConnectionData:
outgoingData.append(connectionParameters)
if (len(outgoingData) >= segmentSize):
# Flush
packet = self.__packetManager.createActiveVMsVNCDataPacket(
self.__vncServerIP, segmentCounter, segmentNumber,
outgoingData)
self.__networkManager.sendPacket('', self.__listenningPort,
packet)
outgoingData = []
segmentCounter += 1
# Send the last segment
if (sendLastSegment):
packet = self.__packetManager.createActiveVMsVNCDataPacket(
self.__vncServerIP, segmentCounter, segmentNumber,
outgoingData)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
def __sendStatusData(self):
"""
Sends the server's status data to the cluster server
Args:
None
Returns:
Nothing
"""
info = self.__domainHandler.getLibvirtStatusData()
realCPUNumber = multiprocessing.cpu_count()
freeOutput = ChildProcessManager.runCommandInForeground(
"free -k", VMServerException)
# free's output contains the following lines and collumns:
# total used free shared buffers cached
# Mem: 4146708480 3939934208 206774272 0 224706560 1117671424
# -/+ buffers/cache: 2597556224 1549152256
# Swap: 2046816256 42455040 2004361216
#
# We must get the third line
availableMemory = int(freeOutput.split("\n")[1].split()[1])
freeMemory = int(freeOutput.split("\n")[2].split()[2])
freeStorageSpace, availableStorageSpace, freeTemporaryStorage, availableTemporaryStorage = self.__generateDiskStats(
)
packet = self.__packetManager.createVMServerStatusPacket(
self.__vncServerIP, info["#domains"], freeMemory, availableMemory,
freeStorageSpace, availableStorageSpace, freeTemporaryStorage,
availableTemporaryStorage, info["#vcpus"], realCPUNumber)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
def __generateDiskStats(self):
"""
Generates the hard disk usage statistics
Args:
None
Returns:
the free and available storage and temporary space
"""
diskStats_storage = os.statvfs(
self.__parser.getConfigurationParameter("sourceImagePath"))
diskStats_temporaryData = os.statvfs(
self.__parser.getConfigurationParameter("executionImagePath"))
allocatedStorageSpace, allocatedTemporaryStorageSpace = self.__checkDiskImagesSpace(
)
freeStorageSpace = diskStats_storage.f_bfree * diskStats_storage.f_frsize / 1024 - allocatedStorageSpace
availableStorageSpace = diskStats_storage.f_blocks * diskStats_storage.f_frsize / 1024
freeTemporaryStorageSpace = diskStats_temporaryData.f_bfree * diskStats_temporaryData.f_frsize / 1024 - allocatedTemporaryStorageSpace
availableTemporaryStorageSpace = diskStats_temporaryData.f_blocks * diskStats_temporaryData.f_frsize / 1024
return freeStorageSpace, availableStorageSpace, freeTemporaryStorageSpace, availableTemporaryStorageSpace
def __checkDiskImagesSpace(self):
"""
Checks how much disk space must be allocated for the active virtual machines' disk images
Args:
None
Returns:
the storage and temporary storage space that must be allocated.
"""
activeDomainNames = self.__commandsDBConnector.getRegisteredDomainNames(
)
allocatedStorageSpace = 0
allocatedTemporaryStorageSpace = 0
for domainName in activeDomainNames:
imageID = self.__commandsDBConnector.getDomainImageID(domainName)
if (imageID == None):
return 0, 0
dataImagePath = self.__commandsDBConnector.getDomainDataImagePath(
domainName)
if (dataImagePath == None):
return 0, 0
osImagePath = self.__commandsDBConnector.getDomainOSImagePath(
domainName)
if (osImagePath == None):
return 0, 0
isEditedImage = self.__commandsDBConnector.getBootableFlag(imageID)
if (isEditedImage == None):
return 0, 0
dataSpace = self.__getAllocatedSpace(dataImagePath)
if (isEditedImage):
osSpace = self.__getAllocatedSpace(osImagePath)
allocatedStorageSpace += osSpace + dataSpace
else:
allocatedTemporaryStorageSpace += dataSpace
return allocatedStorageSpace, allocatedTemporaryStorageSpace
def __getAllocatedSpace(self, imagePath):
"""
Returns the disk space that must be allocated for a disk image
Args:
imagePath: the disk image's path
Returns:
Nothing
"""
try:
output = ChildProcessManager.runCommandInForeground(
"qemu-img info " + imagePath, Exception)
lines = output.split("\n")
virtualSize = VMServerReactor.__extractImageSize(
lines[2].split(":")[1].split("(")[0])
usedSpace = VMServerReactor.__extractImageSize(
lines[3].split(":")[1])
return virtualSize - usedSpace
except Exception as e:
print e
return 0
@staticmethod
def __extractImageSize(string):
"""
Extracts an image size from a quemu-img command output.
Args:
string: the qemu-img command's image size
Returns:
the disk image size (in kilobytes)
"""
if ("G" in string):
power = 2
elif ("M" in string):
power = 1
else:
power = 0
string = string.replace("G", "")
string = string.replace("M", "")
string = string.replace("K", "")
return int(ceil(float(string))) * 1024**power
def __sendActiveDomainUIDs(self):
"""
Sends domains' UUIDs to the cluster server
Args:
None
Returns:
Nothing
"""
activeDomainUIDs = self.__commandsDBConnector.getActiveDomainUIDs()
packet = self.__packetManager.createActiveDomainUIDsPacket(
self.__vncServerIP, activeDomainUIDs)
self.__networkManager.sendPacket('', self.__listenningPort, packet)
def has_finished(self):
"""
Checks if the virtual machine server has been shut down or not
Args:
None
Returns:
Nothing
"""
return self.__finished