def __untarimage(self, imagename, destDir):
logging.info("Untar image")
untarimage = "sudo tar -zxvf " + imagename + " -C " + destDir
try:
execute.osExecute(untarimage)
except:
logging.info('Failed to uncompress image')
raise
def __removeMountpoint(self, mountpoint):
logging.info('removing mount point')
unmountlvm = "sudo umount " + mountpoint
try:
os.chdir("/")
execute.osExecute(unmountlvm)
os.rmdir(mountpoint)
except:
logging.info('Failed to unmount image/delete mount point')
raise
def __startVirtualMachine(self, machinename, configFile):
logging.info('starting the virtual machine')
newConfigFile = "/etc/xen/auto/vnode_" + machinename + ".cfg"
moveConfigFile = "sudo mv " + configFile + " " + newConfigFile
startup = "sudo xm create -f " + newConfigFile
try:
execute.osExecute(moveConfigFile)
execute.osExecute(startup)
except:
logging.info('cannot start the domain with config file: ' + configFile)
raise
def __createMountpoint(self, machinename, mountpoint):
logging.info('creating mount point')
mountlvm = "sudo mount /dev/" + self.__vgName + "/xen-root-" + machinename + " " + mountpoint
try:
os.mkdir(mountpoint)
execute.osExecute(mountlvm)
os.chdir(mountpoint)
except:
logging.info('Failed to mount vm root partition')
raise
def __saveImage(self, machinename, imagename):
tempMountpoint = "/tmp/vnode_" + machinename
tarimage = "sudo tar -cszvf " + imagename + " -C " + tempMountpoint + " ."
try:
self.__createMountpoint(machinename, tempMountpoint)
execute.osExecute(tarimage)
except:
logging.info('failed in saving the image -> ' + imagename)
self.__removeMountpoint(tempMountpoint)
raise
self.__removeMountpoint(tempMountpoint)
def __removeLVMPartition(self, machinename):
rootPartName = "xen-root-" + machinename
swapPartName = "xen-swap-" + machinename
lvrootremove = "sudo lvremove -f /dev/" + self.__vgName + "/" + rootPartName
lvswapremove = "sudo lvremove -f /dev/" + self.__vgName + "/" + swapPartName
try:
try:
if self.__checkPartitionExists(rootPartName):
execute.osExecute(lvrootremove)
except:
logging.info('LVM Root Partition /dev/' + self.__vgName + '/xen-root-' + machinename + ' is NOT removed')
raise
finally:
try:
if self.__checkPartitionExists(swapPartName):
execute.osExecute(lvswapremove)
except:
logging.info('LVM Swap Partition /dev/' + self.__vgName + '/xen-swap-' + machinename + ' is NOT removed')
raise
def __createLVMPartition(self, machinename, partitionSize, mkfsCommand, imageType):
try:
swapSize = self.__config.getVMSwapSize(imageType)
lvrootcreate = "sudo lvcreate --size " + partitionSize + "G --name xen-root-" + machinename + " " + self.__vgName
lvswapcreate = "sudo lvcreate --size " + swapSize + "M --name xen-swap-" + machinename + " " + self.__vgName
makeswap = "sudo mkswap /dev/" + self.__vgName + "/xen-swap-" + machinename
filesystem = "sudo " + mkfsCommand + " /dev/" + self.__vgName + "/xen-root-" + machinename
execute.osExecute(lvrootcreate)
execute.osExecute(lvswapcreate)
execute.osExecute(filesystem)
execute.osExecute(makeswap)
except:
logging.info("Failed to create LVM partition")
raise
def __untarimage(self, imagename, destDir):
logging.info("Untar image")
untarimage = "sudo tar -zxvf " + imagename + " -C " + destDir
try:
execute.osExecute(untarimage)
except:
logging.info('Failed to uncompress image' + imagename)
raise
""" optionally - untar configuration files (if archive exists)
(just to have additional small archive with configs to modify) """
# config filename for image: imagename.tar.gz -> imagename-config.tar.gz
configFileName = re.sub (".tar.gz$", "-config.tar.gz", imagename )
if os.path.isfile(configFileName):
logging.info("Untar config")
untarConfig = "sudo tar -zxvf " + configFileName + " -C " + destDir
try:
execute.osExecute(untarConfig)
except:
logging.info('Failed to uncompress config ' + configFileName)
raise
def __shutdownVirtualMachine(self, machinename):
logging.info('shutting down virtual machine')
configFile = "/etc/xen/auto/vnode_" + machinename + ".cfg"
removeConfigFile = "sudo rm -f " + configFile
try:
#domainId = self.__getDomainId(machinename)
#if domainId != -1:
# shutdown = "sudo xm destroy " + str(domainId)
shutdown = "sudo xm destroy " + machinename
execute.osExecute(shutdown)
except:
logging.info('cannot shutdown "' + machinename + '"')
execute.osExecute(removeConfigFile)
raise
execute.osExecute(removeConfigFile)
