Laboratoire de l'Informatique et du Parallélisme » CIAB

#! /usr/bin/python

#

#

# Define a main function to allow for function declaration in any order.

# The main program lives in the main function.

def main():

  # System modules

  import sys

  import re

  import string

  import commands

  # Local modules (must live in the same directory).

  import ciab_user_functions as cuf

  from ciab_common_vars import (commonVariables)

  #

  # Variables

  nodeNumberString = ''

  nodeAddress      = ''

  templatesDir     = ''

  templatesDirName = '/../templates'

  # Yep, the final comma is correct: it's a list of variables!

  nodeNumberString, = usage(sys.argv)

  # Must be all digits.

  if re.match("\D", nodeNumberString):

    print

    print

    print sys.argv[0], ': invalid node number "', nodeNumberString, '".'

    print 'Aborting!'

    print

    print

    sys.exit(1)

  # Make sure the number is whithin the limits.

  if int(nodeNumberString) >= int(commonVariables['COMPUTE_NODE_MAX_NUM']):

    print

    print

    print sys.argv[0], ': invalid node number "', nodeNumberString, '".'

    print 'Must be <', commonVariables['COMPUTE_NODE_MAX_NUM'], '.'

    print 'Aborting!'

    print

    print

    sys.exit(1)

  # Nomalize to three digits.

  while len(nodeNumberString) < 3:

    nodeNumberString = '0' + nodeNumberString

  print 'Node number string: ', nodeNumberString

  currentNodeName = commonVariables['COMPUTE_NODE_NAME_PREFIX'] + \

                    nodeNumberString

  # Get the templates directory.

  templatesDir = commands.getoutput('dirname ' + sys.argv[0]) + templatesDirName

  # Check if the virtual machine we want to build is not already running.

  isRunning = commands.getoutput('xm list | grep ' + currentNodeName)

  #isRunning = commands.getoutput('xm list | grep ' + 'compute-node-model')

  if isRunning != '':

    print

    print

    print sys.argv[0], ': VM "', currentHostName, '" is already running.'

    print 'Aborting!'

    print

    print

    sys.exit(1)

  # Create the VM system disk (a snapshot of the compute node model disk).

  computeNodeSystemDisk = commonVariables['SYSTEM_DISK_CLONE_PREFIX'] + \

                          nodeNumberString + \

                          commonVariables['SYSTEM_DISK_CLONE_POSTFIX']

  commandString = 'lvcreate -L ' + commonVariables['SYSTEM_DISK_CLONE_SIZE'] + \

                          ' -s ' +\

                          ' -n ' + computeNodeSystemDisk + \

                             ' ' + commonVariables['SYSTEM_DISK_MASTER']

  #print commandString

  status = 0

  # FIXME!!!!!!!!!!!!!!!!!!!!!

  #status,output = commands.getstatusoutput(commandString)

  if status != 0 :

    print

    print

    print sys.argv[0], ': could not create VM system disk.'

    print output

    print 'Aborting!'

    print

    print

    sys.exit(1)

  # Create the VM swap volume

  computeNodeSwapDisk = commonVariables['SWAP_DISK_PREFIX'] + \

                        nodeNumberString + \

                        commonVariables['SWAP_DISK_POSTFIX']

  print computeNodeSwapDisk

  commandString = 'lvcreate -L ' + commonVariables['SWAP_DISK_SIZE'] + \

                          ' -n ' + computeNodeSwapDisk + \

                             ' ' + commonVariables['SWAP_DISK_LOGICAL_VOLUME']

  print commandString

  # FIXME!!!!!!!!!!!!!!!!!!!!!

  #status,output = commands.getstatusoutput(commandString)

  if status != 0 :

    print

    print

    print sys.argv[0], ': could not create the VM swap disk.'

    print output

    print 'Aborting!'

    print

    print

    sys.exit(1)

  commandLine = 'mkswap ' + commonVariables['SWAP_DISK_LOGICAL_VOLUME'] + \

                '/' + computeNodeSwapDisk

  print commandString

  # FIXME!!!!!!!!!!!!!!!!!!!!!

  #status,output = commands.getstatusoutput(commandString)

  if status != 0 :

    print

    print

    print sys.argv[0], ': could not format the VM swap disk.'

    print output

    print 'Aborting!'

    print

    print

    sys.exit(1)

  # Mount the VM system disk to copy all the specific files

  commandString = 'mount ' + commonVariables['SYSTEM_DISK_LOGICAL_VOLUME'] + \

                             '/' + computeNodeSystemDisk + ' ' + \

                             commonVariables['COMPUTE_NODE_DISK_MOUNT_POINT']

  print commandString

  # FIXME!!!!!!!!!!!!!!!!!!!!!

  #status,output = commands.getstatusoutput(commandString)

  if status != 0 :

    print

    print

    print sys.argv[0], ': could not mount the VM system disk.'

    print output

    print 'Aborting!'

    print

    print

    sys.exit(1)

  # /etc/network/interfaces

  currentFile = '/etc/network/interfaces'

  commandString = 'cp ' + templatesDir + currentFile + ' ' +\

                   commonVariables['COMPUTE_NODE_DISK_MOUNT_POINT'] + \

                   currentFile

  print commandString

  nodeAddress = commonVariables['COMPUTE_NODE_STATIC_NETWORK_PREFIX'] + '.' + \

                nodeNumberString

  commandString = 'rpl __STATIC_ADDRESS__ ' + nodeAddress + ' ' + \

                  commonVariables['COMPUTE_NODE_DISK_MOUNT_POINT']

#  cp templates$CURRENT_PATH/interfaces \

#   $COMPUTE_NODE_DISK_MOUNT_POINT/$CURRENT_PATH

#  ADDRESS="$COMPUTE_NODE_STATIC_NETWORK_PREFIX.$NODE_NUMBER"

#  rpl __STATIC_ADDRESS__ $ADDRESS  \

#    ${COMPUTE_NODE_DISK_MOUNT_POINT}${CURRENT_PATH}/interfaces

  print 'Current node name: ', currentNodeName

  print commonVariables.keys()

  print commonVariables.values()

# End main

def usage(arguments):

  import sys

  if (len(arguments) < 2):

    print

    print

    print 'Missing parameter. Aborting'

    print

    print 'Usage: ' + arguments[0] + ' node_number'

    print

    print

    sys.exit(1)

  nodeNumberString = arguments[1]

  # Yep, the final comma is correct: it's a list of variables!

  return nodeNumberString,

if __name__ == "__main__":

  main()