X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=source%2Fsteps%2FInstallPartitionDisks.py;fp=source%2Fsteps%2FInstallPartitionDisks.py;h=b469330a31a81e49779f70d7acf7b1dd1dd41969;hb=7cd82eb93512460e8dd748f9737648aabf05f70d;hp=0000000000000000000000000000000000000000;hpb=0ead051299a3094173442795ee262b0900a71ecd;p=bootmanager.git diff --git a/source/steps/InstallPartitionDisks.py b/source/steps/InstallPartitionDisks.py new file mode 100644 index 0000000..b469330 --- /dev/null +++ b/source/steps/InstallPartitionDisks.py @@ -0,0 +1,394 @@ +#!/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" + + 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 "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 ) + + # 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 -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} + + # 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 + # 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