# # 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 as var: raise BootManagerException("Missing variable in vars: {}\n".format(var)) except ValueError as var: raise BootManagerException("Variable in vars, shouldn't be: {}\n".format(var)) bs_request = BootServerRequest.BootServerRequest(vars) # disable swap if its on utils.sysexec_noerr("swapoff {}".format(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 {}".format(PARTITIONS["root"]), log) utils.sysexec_noerr("lvremove -f {}".format(PARTITIONS["swap"]), log) utils.sysexec_noerr("lvremove -f {}".format(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 {}.\n".format(device)) else: used_devices.append(device) log.write("Successfully initialized {}\n".format(device)) else: log.write("Unable to partition {}, not using it.\n".format(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={}\n".format(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 {}".format(part_path)) vg_device_list = vg_device_list + " " + part_path # create an lvm volume group utils.sysexec("vgcreate -s32M planetlab {}".format(vg_device_list), log) # create swap logical volume utils.sysexec("lvcreate -L{} -nswap planetlab".format(SWAP_SIZE), log) # check if we want a separate partition for VMs one_partition = vars['ONE_PARTITION']=='1' if one_partition: remaining_extents = get_remaining_extents_on_vg(vars, log) utils.sysexec("lvcreate -l{} -nroot planetlab".format(remaining_extents), log) else: utils.sysexec("lvcreate -L{} -nroot planetlab".format(ROOT_SIZE), log) if vars['NODE_MODEL_OPTIONS'] & ModelOptions.RAWDISK and VSERVERS_SIZE != "-1": utils.sysexec("lvcreate -L{} -nvservers planetlab".format(VSERVERS_SIZE), log) remaining_extents = get_remaining_extents_on_vg(vars, log) utils.sysexec("lvcreate -l{} -nrawdisk planetlab".format(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{} -nvservers planetlab".format(remaining_extents), log) # activate volume group (should already be active) #utils.sysexec(TEMP_PATH + "vgchange -ay planetlab", log) # make swap utils.sysexec("mkswap -f {}".format(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 {} partition ({}){}.\n".format(fs, devname, txt)) utils.sysexec("mkfs.ext2 -q {} -m {} -j {}".format(option, rbp, devname), log) # disable time/count based filesystems checks utils.sysexec_noerr("tune2fs -c -1 -i 0 {}".format(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 {} partition ({}){}.\n".format(fs, devname, txt)) utils.sysexec("mkfs.ext2 -q {} -m {} -j {}".format(option, rbp, devname), log) # disable time/count based filesystems checks utils.sysexec_noerr("tune2fs -c -1 -i 0 {}".format(devname), log) elif not one_partition: log.write("formatting {} btrfs partition ({}).\n".format(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 += " {}".format(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): {}\n".format(repr(used_devices))) # list of block devices used may be updated vars["INSTALL_BLOCK_DEVICES"] = used_devices utils.display_disks_status(PARTITIONS, "End of InstallPartitionDisks", log) 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={} bs=512 count=1".format(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 as exc: log.write("BootManagerException while running: {}\n".format(str(exc))) return 0 except parted.error as exc: log.write("parted exception while running: {}\n".format(str(exc))) 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={} bs=512 count=1".format(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 {} - partition type {}\n{}\n".format(device, part_type, disk)) log.write("Current dev for {}\n{}\n".format(device, dev)) del disk try: partition_table(device, 'msdos', 'ext2') except: partition_table(device, 'gpt', 'ext2') except Exception as e: log.write("Exception inside single_partition_device_2_x : {}\n".format(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={} bs=512 count=1".format(part_path), log) ### patch Thierry Parmentelat, required on some hardware import time time.sleep(1) utils.sysexec("pvcreate -ffy {}".format(part_path), log) except BootManagerException as 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 {} ".format(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: {}\n".format(partitions)) raise BootManagerException("Not enough disks for raid. Found: {}\n".format(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} --chunk=128 --level=raid{lvl} "\ "--raid-devices={num_parts} {part_list}".format(**locals()) utils.sysexec(cmd, log) except BootManagerException as 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