#!/usr/bin/python # Copyright (c) 2003 Intel Corporation # All rights reserved. # # Copyright (c) 2004-2006 The Trustees of Princeton University # All rights reserved. # expected /proc/partitions format import os, sys import string import popen2 from Exceptions import * import utils import BootServerRequest import ModelOptions def Run( vars, log ): """ Setup the block devices for install, partition them w/ LVM Expect the following variables from the store: INSTALL_BLOCK_DEVICES list of block devices to install onto TEMP_PATH somewhere to store what we need to run ROOT_SIZE the size of the root logical volume SWAP_SIZE the size of the swap partition """ log.write( "\n\nStep: Install: partitioning disks.\n" ) # make sure we have the variables we need try: TEMP_PATH= vars["TEMP_PATH"] if TEMP_PATH == "": raise ValueError, "TEMP_PATH" INSTALL_BLOCK_DEVICES= vars["INSTALL_BLOCK_DEVICES"] if( len(INSTALL_BLOCK_DEVICES) == 0 ): raise ValueError, "INSTALL_BLOCK_DEVICES is empty" ROOT_SIZE= vars["ROOT_SIZE"] if ROOT_SIZE == "" or ROOT_SIZE == 0: raise ValueError, "ROOT_SIZE invalid" SWAP_SIZE= vars["SWAP_SIZE"] if SWAP_SIZE == "" or SWAP_SIZE == 0: raise ValueError, "SWAP_SIZE invalid" NODE_MODEL_OPTIONS= vars["NODE_MODEL_OPTIONS"] PARTITIONS= vars["PARTITIONS"] if PARTITIONS == None: raise ValueError, "PARTITIONS" if NODE_MODEL_OPTIONS & ModelOptions.RAWDISK: VSERVERS_SIZE= "-1" if "VSERVER_SIZE" in vars: VSERVERS_SIZE= vars["VSERVERS_SIZE"] if VSERVERS_SIZE == "" or VSERVERS_SIZE == 0: raise ValueError, "VSERVERS_SIZE" except KeyError, var: raise BootManagerException, "Missing variable in vars: %s\n" % var except ValueError, var: raise BootManagerException, "Variable in vars, shouldn't be: %s\n" % var bs_request= BootServerRequest.BootServerRequest(vars) # disable swap if its on utils.sysexec_noerr( "swapoff %s" % PARTITIONS["swap"], log ) # shutdown and remove any lvm groups/volumes utils.sysexec_noerr( "vgscan", log ) utils.sysexec_noerr( "vgchange -ay", log ) utils.sysexec_noerr( "lvremove -f %s" % PARTITIONS["root"], log ) utils.sysexec_noerr( "lvremove -f %s" % PARTITIONS["swap"], log ) utils.sysexec_noerr( "lvremove -f %s" % PARTITIONS["vservers"], log ) utils.sysexec_noerr( "vgchange -an", log ) utils.sysexec_noerr( "vgremove planetlab", log ) log.write( "Running vgscan for devices\n" ) utils.sysexec_noerr( "vgscan", log ) used_devices= [] INSTALL_BLOCK_DEVICES.sort() for device in INSTALL_BLOCK_DEVICES: if single_partition_device( device, vars, log ): if (len(used_devices) > 0 and (vars['NODE_MODEL_OPTIONS'] & ModelOptions.RAWDISK)): log.write( "Running in raw disk mode, not using %s.\n" % device ) else: used_devices.append( device ) log.write( "Successfully initialized %s\n" % device ) else: log.write( "Unable to partition %s, not using it.\n" % device ) continue # list of devices to be used with vgcreate vg_device_list= "" # initialize the physical volumes for device in used_devices: part_path= get_partition_path_from_device( device, vars, log ) if not create_lvm_physical_volume( part_path, vars, log ): raise BootManagerException, "Could not create lvm physical volume " \ "on partition %s" % part_path vg_device_list = vg_device_list + " " + part_path # create an lvm volume group utils.sysexec( "vgcreate -s32M planetlab %s" % vg_device_list, log) # create swap logical volume utils.sysexec( "lvcreate -L%s -nswap planetlab" % SWAP_SIZE, log ) # create root logical volume utils.sysexec( "lvcreate -L%s -nroot planetlab" % ROOT_SIZE, log ) if vars['NODE_MODEL_OPTIONS'] & ModelOptions.RAWDISK and VSERVERS_SIZE != "-1": utils.sysexec( "lvcreate -L%s -nvservers planetlab" % VSERVERS_SIZE, log ) remaining_extents= get_remaining_extents_on_vg( vars, log ) utils.sysexec( "lvcreate -l%s -nrawdisk planetlab" % remaining_extents, log ) else: # create vservers logical volume with all remaining space # first, we need to get the number of remaining extents we can use remaining_extents= get_remaining_extents_on_vg( vars, log ) utils.sysexec( "lvcreate -l%s -nvservers planetlab" % remaining_extents, log ) # activate volume group (should already be active) #utils.sysexec( TEMP_PATH + "vgchange -ay planetlab", log ) # make swap utils.sysexec( "mkswap %s" % PARTITIONS["swap"], log ) # check if badhd option has been set option = '' txt = '' if NODE_MODEL_OPTIONS & ModelOptions.BADHD: option = '-c' txt = " with bad block search enabled, which may take a while" # filesystems partitions names and their corresponding # reserved-blocks-percentages filesystems = {"root":5,"vservers":0} # make the file systems for fs in filesystems.keys(): # get the reserved blocks percentage rbp = filesystems[fs] devname = PARTITIONS[fs] log.write("formatting %s partition (%s)%s.\n" % (fs,devname,txt)) utils.sysexec( "mkfs.ext2 -q %s -m %d -j %s" % (option,rbp,devname), log ) # disable time/count based filesystems checks for filesystem in ("root","vservers"): utils.sysexec_noerr( "tune2fs -c -1 -i 0 %s" % PARTITIONS[filesystem], log) # save the list of block devices in the log log.write( "Block devices used (in lvm): %s\n" % repr(used_devices)) # list of block devices used may be updated vars["INSTALL_BLOCK_DEVICES"]= used_devices return 1 import parted def single_partition_device( device, vars, log ): """ initialize a disk by removing the old partition tables, and creating a new single partition that fills the disk. return 1 if sucessful, 0 otherwise """ # two forms, depending on which version of pyparted we have try: version=parted.version() return single_partition_device_2_x (device, vars, log) except: return single_partition_device_1_x (device, vars, log) def single_partition_device_1_x ( device, vars, log): lvm_flag= parted.partition_flag_get_by_name('lvm') try: print >>log, "Using pyparted 1.x" # wipe the old partition table utils.sysexec( "dd if=/dev/zero of=%s bs=512 count=1" % device, log ) # get the device dev= parted.PedDevice.get(device) # create a new partition table disk= dev.disk_new_fresh(parted.disk_type_get("msdos")) # create one big partition on each block device constraint= dev.constraint_any() new_part= disk.partition_new( parted.PARTITION_PRIMARY, parted.file_system_type_get("ext2"), 0, 1 ) # make it an lvm partition new_part.set_flag(lvm_flag,1) # actually add the partition to the disk disk.add_partition(new_part, constraint) disk.maximize_partition(new_part,constraint) disk.commit() del disk except BootManagerException, e: log.write( "BootManagerException while running: %s\n" % str(e) ) return 0 except parted.error, e: log.write( "parted exception while running: %s\n" % str(e) ) return 0 return 1 def single_partition_device_2_x ( device, vars, log): try: print >>log, "Using pyparted 2.x" # wipe the old partition table utils.sysexec( "dd if=/dev/zero of=%s bs=512 count=1" % device, log ) # get the device dev= parted.Device(device) # create a new partition table disk= parted.freshDisk(dev,'msdos') # create one big partition on each block device constraint= parted.constraint.Constraint (device=dev) geometry = parted.geometry.Geometry (device=dev, start=0, end=1) fs = parted.filesystem.FileSystem (type="ext2",geometry=geometry) new_part= parted.partition.Partition (disk, type=parted.PARTITION_NORMAL, fs=fs, geometry=geometry) # make it an lvm partition new_part.setFlag(parted.PARTITION_LVM) # actually add the partition to the disk disk.addPartition(new_part, constraint) disk.maximizePartition(new_part,constraint) disk.commit() print >>log, 'Current disk for %s'%device,disk print >>log, 'Current dev for %s'%device,dev del disk except Exception, e: log.write( "Exception inside single_partition_device_2_x : %s\n" % str(e) ) import traceback traceback.print_exc(file=log) return 0 return 1 def create_lvm_physical_volume( part_path, vars, log ): """ make the specificed partition a lvm physical volume. return 1 if successful, 0 otherwise. """ try: # again, wipe any old data, this time on the partition utils.sysexec( "dd if=/dev/zero of=%s bs=512 count=1" % part_path, log ) ### patch Thierry Parmentelat, required on some hardware import time time.sleep(1) utils.sysexec( "pvcreate -ffy %s" % part_path, log ) except BootManagerException, e: log.write( "create_lvm_physical_volume failed.\n" ) return 0 return 1 def get_partition_path_from_device( device, vars, log ): """ given a device, return the path of the first partition on the device """ # those who wrote the cciss driver just had to make it difficult cciss_test= "/dev/cciss" if device[:len(cciss_test)] == cciss_test: part_path= device + "p1" else: part_path= device + "1" return part_path def get_remaining_extents_on_vg( vars, log ): """ return the free amount of extents on the planetlab volume group """ c_stdout, c_stdin = popen2.popen2("vgdisplay -c planetlab") result= string.strip(c_stdout.readline()) c_stdout.close() c_stdin.close() remaining_extents= string.split(result,":")[15] return remaining_extents