#!/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 import time from Exceptions import * import utils import BootServerRequest import BootAPI 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" # use vs_ROOT_SIZE or lxc_ROOT_SIZE as appropriate varname=vars['virt']+"_ROOT_SIZE" ROOT_SIZE= vars[varname] 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 "VSERVERS_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 -f 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= "" # get partitions partitions = [] for device in used_devices: part_path= get_partition_path_from_device( device, vars, log ) partitions.append(part_path) # create raid partition raid_partition = create_raid_partition(partitions, vars, log) if raid_partition != None: partitions = [raid_partition] log.write("PARTITIONS %s\n" % str(partitions)) # initialize the physical volumes for part_path in partitions: 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 ) # check if we want a separate partition for VMs one_partition = (ROOT_SIZE == "-1") if (one_partition): remaining_extents= get_remaining_extents_on_vg( vars, log ) utils.sysexec( "lvcreate -l%s -nroot planetlab" % remaining_extents, log ) else: 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 -f %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} # ROOT filesystem is always with ext2 fs = 'root' 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 utils.sysexec_noerr( "tune2fs -c -1 -i 0 %s" % devname, log) # VSERVER filesystem with btrfs to support snapshoting and stuff fs = 'vservers' rbp = filesystems[fs] devname = PARTITIONS[fs] if vars['virt']=='vs': 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 utils.sysexec_noerr( "tune2fs -c -1 -i 0 %s" % devname, log) else: log.write("formatting %s btrfs partition (%s).\n" % (fs,devname)) # early BootCD's seem to come with a version of mkfs.btrfs that does not support -f # let's check for that before invoking it mkfs="mkfs.btrfs" if os.system("mkfs.btrfs --help 2>&1 | grep force")==0: mkfs+=" -f" mkfs+=" %s"%devname utils.sysexec( mkfs, log ) # as of 2013/02 it looks like there's not yet an option to set fsck frequency with btrfs # 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 # v1 does not have a 'version' method # v2 and above does, but to make it worse, # parted-3.4 on f14 has parted.version broken and raises SystemError try: parted.version() return single_partition_device_2_x (device, vars, log) except AttributeError: # old parted does not have version at all return single_partition_device_1_x (device, vars, log) except SystemError: # let's assume this is >=2 return single_partition_device_2_x (device, vars, log) except: raise def single_partition_device_1_x ( device, vars, log): lvm_flag= parted.partition_flag_get_by_name('lvm') try: log.write("Using pyparted 1.x\n") # 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: log.write("Using pyparted 2.x\n") # Thierry june 2012 -- for disks larger than 2TB # calling this with part_type='msdos' would fail at the maximizePartition stage # create a new partition table def partition_table (device, part_type, fs_type): # 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) disk = parted.freshDisk(dev,part_type) # 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=fs_type,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() log.write ("Current disk for %s - partition type %s\n%s\n"%(device,part_type,disk)) log.write ("Current dev for %s\n%s\n"%(device,dev)) del disk try: partition_table (device, 'msdos', 'ext2') except: partition_table (device, 'gpt', 'ext2') 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 create_raid_partition(partitions, vars, log): """ create raid array using specified partitions. """ raid_part = None raid_enabled = False node_tags = BootAPI.call_api_function( vars, "GetNodeTags", ({'node_id': vars['NODE_ID']},)) for node_tag in node_tags: if node_tag['tagname'] == 'raid_enabled' and \ node_tag['value'] == '1': raid_enabled = True break if not raid_enabled: return raid_part try: log.write( "Software raid enabled.\n" ) # wipe everything utils.sysexec_noerr("mdadm --stop /dev/md0", log) time.sleep(1) for part_path in partitions: utils.sysexec_noerr("mdadm --zero-superblock %s " % part_path, log) # assume each partiton is on a separate disk num_parts = len(partitions) if num_parts < 2: log.write( "Not enough disks for raid. Found: %s\n" % partitions ) raise BootManagerException("Not enough disks for raid. Found: %s\n" % partitions) if num_parts == 2: lvl = 1 else: lvl = 5 # make the array part_list = " ".join(partitions) raid_part = "/dev/md0" cmd = "mdadm --create %(raid_part)s --chunk=128 --level=raid%(lvl)s " % locals() + \ "--raid-devices=%(num_parts)s %(part_list)s" % locals() utils.sysexec(cmd, log) except BootManagerException, e: log.write("create_raid_partition failed.\n") raid_part = None return raid_part 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