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backend.py
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backend.py
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# SPDX-License-Identifier: GPL-2.0-only
import os
import os.path
import stat
import subprocess
import datetime
import re
import tempfile
import repository
import generalui
import xelogging
import util
import diskutil
from disktools import *
import fcoeutil
import netutil
import shutil
import constants
import hardware
import upgrade
import init_constants
import scripts
import xcp.bootloader as bootloader
import netinterface
import tui.repo
import xcp.dom0
from xcp import logger
from xcp.version import Version
# Product version and constants:
import version
from version import *
from constants import *
from functools import reduce
MY_PRODUCT_BRAND = PRODUCT_BRAND or PLATFORM_NAME
class InvalidInstallerConfiguration(Exception):
pass
################################################################################
# FIRST STAGE INSTALLATION:
class Task:
"""
Represents an install step.
'fn' is the function to execute
'args' is a list of value labels identifying arguments to the function,
'returns' is a list of the labels of the return values, or a function
that, when given the 'args' labels list, returns the list of the
labels of the return values.
"""
def __init__(self, fn, args, returns, args_sensitive=False,
progress_scale=1, pass_progress_callback=False,
progress_text=None):
self.fn = fn
self.args = args
self.returns = returns
self.args_sensitive = args_sensitive
self.progress_scale = progress_scale
self.pass_progress_callback = pass_progress_callback
self.progress_text = progress_text
def execute(self, answers, progress_callback=lambda x: ()):
args = self.args(answers)
assert type(args) == list
if not self.args_sensitive:
logger.log("TASK: Evaluating %s%s" % (self.fn, args))
else:
logger.log("TASK: Evaluating %s (sensitive data in arguments: not logging)" % self.fn)
if self.pass_progress_callback:
args.insert(0, progress_callback)
rv = self.fn(*args)
if type(rv) is not tuple:
rv = (rv,)
myrv = {}
if callable(self.returns):
ret = self.returns(*args)
else:
ret = self.returns
for r in range(len(ret)):
myrv[ret[r]] = rv[r]
return myrv
###
# INSTALL SEQUENCES:
# convenience functions
# A: For each label in params, gives an arg function that evaluates
# the labels when the function is called (late-binding)
# As: As above but evaluated immediately (early-binding)
# Use A when you require state values as well as the initial input values
A = lambda ans, *params: ( lambda a: [a.get(param) for param in params] )
As = lambda ans, *params: ( lambda _: [ans.get(param) for param in params] )
def getPrepSequence(ans, interactive):
seq = [
Task(util.getUUID, As(ans), ['installation-uuid']),
Task(util.getUUID, As(ans), ['control-domain-uuid']),
Task(util.randomLabelStr, As(ans), ['disk-label-suffix']),
Task(partitionTargetDisk, A(ans, 'primary-disk', 'installation-to-overwrite', 'preserve-first-partition','sr-on-primary'), ['target-boot-mode', 'boot-partnum', 'primary-partnum', 'backup-partnum', 'logs-partnum', 'swap-partnum', 'storage-partnum']),
]
if ans['ntp-config-method'] in ("dhcp", "default", "manual"):
seq.append(Task(setTimeNTP, A(ans, 'ntp-servers', 'ntp-config-method'), []))
elif ans['ntp-config-method'] == "none":
seq.append(Task(setTimeManually, A(ans, 'localtime', 'set-time-dialog-dismissed', 'timezone'), []))
if not interactive:
seq.append(Task(verifyRepos, A(ans, 'sources', 'ui'), []))
if ans['install-type'] == INSTALL_TYPE_FRESH:
seq += [
Task(removeBlockingVGs, As(ans, 'guest-disks'), []),
Task(writeDom0DiskPartitions, A(ans, 'primary-disk', 'target-boot-mode', 'boot-partnum', 'primary-partnum', 'backup-partnum', 'logs-partnum', 'swap-partnum', 'storage-partnum', 'sr-at-end'),[]),
]
seq.append(Task(writeGuestDiskPartitions, A(ans,'primary-disk', 'guest-disks'), []))
elif ans['install-type'] == INSTALL_TYPE_REINSTALL:
seq.append(Task(getUpgrader, A(ans, 'installation-to-overwrite'), ['upgrader']))
if 'backup-existing-installation' in ans and ans['backup-existing-installation']:
seq.append(Task(doBackup,
lambda a: [ a['upgrader'] ] + [ a[x] for x in a['upgrader'].doBackupArgs ],
lambda progress_callback, upgrader, *a: upgrader.doBackupStateChanges,
progress_text="Backing up existing installation...",
progress_scale=100,
pass_progress_callback=True))
seq.append(Task(prepareTarget,
lambda a: [ a['upgrader'] ] + [ a[x] for x in a['upgrader'].prepTargetArgs ],
lambda progress_callback, upgrader, *a: upgrader.prepTargetStateChanges,
progress_text="Preparing target disk...",
progress_scale=100,
pass_progress_callback=True))
seq.append(Task(prepareUpgrade,
lambda a: [ a['upgrader'] ] + [ a[x] for x in a['upgrader'].prepUpgradeArgs ],
lambda progress_callback, upgrader, *a: upgrader.prepStateChanges,
progress_text="Preparing for upgrade...",
progress_scale=100,
pass_progress_callback=True))
seq += [
Task(createDom0DiskFilesystems, A(ans, 'install-type', 'primary-disk', 'target-boot-mode', 'boot-partnum', 'primary-partnum', 'logs-partnum', 'disk-label-suffix'), []),
Task(mountVolumes, A(ans, 'primary-disk', 'boot-partnum', 'primary-partnum', 'logs-partnum', 'cleanup', 'target-boot-mode'), ['mounts', 'cleanup']),
]
return seq
def getMainRepoSequence(ans, repos):
seq = []
seq.append(Task(repository.installFromRepos, lambda a: [repos] + [a.get('mounts')], [],
progress_scale=100,
pass_progress_callback=True,
progress_text="Installing %s..." % (", ".join([repo.name() for repo in repos]))))
for repo in repos:
seq.append(Task(repo.record_install, A(ans, 'mounts', 'installed-repos'), ['installed-repos']))
seq.append(Task(repo.getBranding, A(ans, 'branding'), ['branding']))
return seq
def getRepoSequence(ans, repos):
seq = []
for repo in repos:
seq.append(Task(repo.installPackages, A(ans, 'mounts'), [],
progress_scale=100,
pass_progress_callback=True,
progress_text="Installing %s..." % repo.name()))
seq.append(Task(repo.record_install, A(ans, 'mounts', 'installed-repos'), ['installed-repos']))
seq.append(Task(repo.getBranding, A(ans, 'branding'), ['branding']))
return seq
def getFinalisationSequence(ans):
seq = [
Task(writeResolvConf, A(ans, 'mounts', 'manual-hostname', 'manual-nameservers'), []),
Task(writeMachineID, A(ans, 'mounts'), []),
Task(writeKeyboardConfiguration, A(ans, 'mounts', 'keymap'), []),
Task(configureNetworking, A(ans, 'mounts', 'net-admin-interface', 'net-admin-bridge', 'net-admin-configuration', 'manual-hostname', 'manual-nameservers', 'network-hardware', 'preserve-settings', 'network-backend'), []),
Task(prepareSwapfile, A(ans, 'mounts', 'primary-disk', 'swap-partnum', 'disk-label-suffix'), []),
Task(writeFstab, A(ans, 'mounts', 'target-boot-mode', 'primary-disk', 'logs-partnum', 'swap-partnum', 'disk-label-suffix'), []),
Task(enableAgent, A(ans, 'mounts', 'network-backend', 'services'), []),
Task(configureCC, A(ans, 'mounts'), []),
Task(writeInventory, A(ans, 'installation-uuid', 'control-domain-uuid', 'mounts', 'primary-disk',
'backup-partnum', 'storage-partnum', 'guest-disks', 'net-admin-bridge',
'branding', 'net-admin-configuration', 'host-config', 'install-type'), []),
Task(writeXencommons, A(ans, 'control-domain-uuid', 'mounts'), []),
Task(configureISCSI, A(ans, 'mounts', 'primary-disk'), []),
Task(mkinitrd, A(ans, 'mounts', 'primary-disk', 'primary-partnum',
'fcoe-interfaces'), []),
Task(prepFallback, A(ans, 'mounts', 'primary-disk', 'primary-partnum'), []),
Task(installBootLoader, A(ans, 'mounts', 'primary-disk',
'boot-partnum', 'primary-partnum', 'target-boot-mode', 'branding',
'disk-label-suffix', 'bootloader-location', 'write-boot-entry', 'install-type',
'serial-console', 'boot-serial', 'host-config', 'fcoe-interfaces'), []),
Task(touchSshAuthorizedKeys, A(ans, 'mounts'), []),
Task(setRootPassword, A(ans, 'mounts', 'root-password'), [], args_sensitive=True),
Task(setTimeZone, A(ans, 'mounts', 'timezone'), []),
Task(writei18n, A(ans, 'mounts'), []),
Task(configureMCELog, A(ans, 'mounts'), []),
]
# on fresh installs, prepare the storage repository as required:
if ans['install-type'] == INSTALL_TYPE_FRESH:
seq += [
Task(prepareStorageRepositories, A(ans, 'mounts', 'primary-disk', 'storage-partnum', 'guest-disks', 'sr-type'), []),
Task(configureSRMultipathing, A(ans, 'mounts', 'primary-disk'), []),
]
seq.append(Task(setDHCPNTP, A(ans, "mounts", "ntp-config-method"), []))
if ans['ntp-config-method'] != "none":
seq.append(Task(configureNTP, A(ans, 'mounts', 'ntp-config-method', 'ntp-servers'), []))
# complete upgrade if appropriate:
if ans['install-type'] == constants.INSTALL_TYPE_REINSTALL:
seq.append( Task(completeUpgrade, lambda a: [ a['upgrader'] ] + [ a[x] for x in a['upgrader'].completeUpgradeArgs ], []) )
# run the users's scripts
seq.append( Task(scripts.run_scripts, lambda a: ['filesystem-populated', a['mounts']['root']], []) )
seq.append(Task(umountVolumes, A(ans, 'mounts', 'cleanup'), ['cleanup']))
if ans['target-boot-mode'] == TARGET_BOOT_MODE_LEGACY:
seq.append(Task(setActiveDiskPartition, A(ans, 'primary-disk', 'boot-partnum', 'primary-partnum'), []))
seq.append(Task(writeLog, A(ans, 'primary-disk', 'primary-partnum', 'logs-partnum'), []))
return seq
def prettyLogAnswers(answers):
for a in answers:
if a == 'root-password':
val = (answers[a][0], '< not printed >')
elif a == 'pool-token':
val = '< not printed >'
else:
val = answers[a]
logger.log("%s := %s %s" % (a, val, type(val)))
def executeSequence(sequence, seq_name, answers, ui, cleanup):
answers['cleanup'] = []
answers['ui'] = ui
progress_total = reduce(lambda x, y: x + y,
[task.progress_scale for task in sequence])
pd = None
if ui:
pd = ui.progress.initProgressDialog(
"Installing %s" % MY_PRODUCT_BRAND,
seq_name, progress_total
)
logger.log("DISPATCH: NEW PHASE: %s" % seq_name)
def doCleanup(actions):
for tag, f, a in actions:
try:
f(*a)
except:
logger.log("FAILED to perform cleanup action %s" % tag)
def progressCallback(x):
if ui:
ui.progress.displayProgressDialog(current + x, pd)
try:
current = 0
for item in sequence:
if pd:
if item.progress_text:
text = item.progress_text
else:
text = seq_name
ui.progress.displayProgressDialog(current, pd, updated_text=text)
updated_state = item.execute(answers, progressCallback)
if len(updated_state) > 0:
logger.log(
"DISPATCH: Updated state: %s" %
"; ".join(["%s -> %s" % (k, v) for k, v in updated_state.items()])
)
for state_item in updated_state:
answers[state_item] = updated_state[state_item]
current = current + item.progress_scale
except:
doCleanup(answers['cleanup'])
raise
else:
if ui and pd:
ui.progress.clearModelessDialog()
if cleanup:
doCleanup(answers['cleanup'])
del answers['cleanup']
def performInstallation(answers, ui_package, interactive):
logger.log("INPUT ANSWERS DICTIONARY:")
prettyLogAnswers(answers)
logger.log("SCRIPTS DICTIONARY:")
prettyLogAnswers(scripts.script_dict)
dom0_mem = xcp.dom0.default_memory_for_version(
hardware.getHostTotalMemoryKB(),
Version.from_string(version.PLATFORM_VERSION)) // 1024
dom0_vcpus = xcp.dom0.default_vcpus(hardware.getHostTotalCPUs(), dom0_mem)
default_host_config = { 'dom0-mem': dom0_mem,
'dom0-vcpus': dom0_vcpus,
'xen-cpuid-masks': [] }
defaults = { 'branding': {}, 'host-config': {}, 'write-boot-entry': True }
# update the settings:
if answers['preserve-settings'] == True:
defaults.update({ 'guest-disks': [] })
logger.log("Updating answers dictionary based on existing installation")
try:
answers.update(answers['installation-to-overwrite'].readSettings())
# Use the new default amount of RAM as long as it doesn't result in
# a decrease from the previous installation. Update the number of
# dom0 vCPUs since it depends on the amount of RAM assigned.
if 'dom0-mem' in answers['host-config']:
answers['host-config']['dom0-mem'] = max(answers['host-config']['dom0-mem'],
default_host_config['dom0-mem'])
default_host_config['dom0-vcpus'] = xcp.dom0.default_vcpus(hardware.getHostTotalCPUs(),
answers['host-config']['dom0-mem'])
except Exception as e:
logger.logException(e)
raise RuntimeError("Failed to get existing installation settings")
prettyLogAnswers(answers)
else:
defaults.update({ 'master': None,
'sr-type': constants.SR_TYPE_LVM,
'bootloader-location': constants.BOOT_LOCATION_MBR,
'sr-at-end': True,
'sr-on-primary': True})
logger.log("Updating answers dictionary based on defaults")
for k, v in defaults.items():
if k not in answers:
answers[k] = v
for k, v in default_host_config.items():
if k not in answers['host-config']:
answers['host-config'][k] = v
logger.log("UPDATED ANSWERS DICTIONARY:")
prettyLogAnswers(answers)
# Slight hack: we need to write the bridge name to xensource-inventory
# further down; compute it here based on the admin interface name if we
# haven't already recorded it as part of reading settings from an upgrade:
if answers['install-type'] == INSTALL_TYPE_FRESH:
answers['net-admin-bridge'] = ''
elif 'net-admin-bridge' not in answers:
assert answers['net-admin-interface'].startswith("eth")
answers['net-admin-bridge'] = "xenbr%s" % answers['net-admin-interface'][3:]
# perform installation:
prep_seq = getPrepSequence(answers, interactive)
answers_pristine = answers.copy()
executeSequence(prep_seq, "Preparing for installation...", answers, ui_package, False)
# install from main repositories:
def handleMainRepos(main_repositories, ans):
repo_seq = getMainRepoSequence(ans, main_repositories)
executeSequence(repo_seq, "Reading package information...", ans, ui_package, False)
def handleRepos(repos, ans):
repo_seq = getRepoSequence(ans, repos)
executeSequence(repo_seq, "Reading package information...", ans, ui_package, False)
answers['installed-repos'] = {}
# A list needs to be used rather than a set since the order of updates is
# important. However, since the same repository might exist in multiple
# locations or the same location might be listed multiple times, care is
# needed to ensure that there are no duplicates.
main_repositories = []
update_repositories = []
def add_repos(main_repositories, update_repositories, repos):
"""Add repositories to the appropriate list, ensuring no duplicates,
that the main repository is at the beginning, and that the order of the
rest is maintained."""
for repo in repos:
if isinstance(repo, repository.UpdateYumRepository):
repo_list = update_repositories
else:
repo_list = main_repositories
if repo not in repo_list:
if repo.identifier() == MAIN_REPOSITORY_NAME:
repo_list.insert(0, repo)
else:
repo_list.append(repo)
# A list of sources coming from the answerfile
if 'sources' in answers_pristine:
for i in answers_pristine['sources']:
repos = repository.repositoriesFromDefinition(i['media'], i['address'])
add_repos(main_repositories, update_repositories, repos)
# A single source coming from an interactive install
if 'source-media' in answers_pristine and 'source-address' in answers_pristine:
repos = repository.repositoriesFromDefinition(answers_pristine['source-media'], answers_pristine['source-address'])
add_repos(main_repositories, update_repositories, repos)
for media, address in answers_pristine['extra-repos']:
repos = repository.repositoriesFromDefinition(media, address)
add_repos(main_repositories, update_repositories, repos)
if not main_repositories or main_repositories[0].identifier() != MAIN_REPOSITORY_NAME:
raise RuntimeError("No main repository found")
handleMainRepos(main_repositories, answers)
if update_repositories:
handleRepos(update_repositories, answers)
# Find repositories that we installed from removable media
# and eject the media.
for r in main_repositories + update_repositories:
if r.accessor().canEject():
r.accessor().eject()
if interactive and constants.HAS_SUPPLEMENTAL_PACKS:
# Add supp packs in a loop
while True:
media_ans = dict(answers_pristine)
del media_ans['source-media']
del media_ans['source-address']
media_ans = ui_package.installer.more_media_sequence(media_ans)
if 'more-media' not in media_ans or not media_ans['more-media']:
break
repos = repository.repositoriesFromDefinition(media_ans['source-media'], media_ans['source-address'])
repos = set([repo for repo in repos if str(repo) not in answers['installed-repos']])
if not repos:
continue
handleRepos(repos, answers)
for r in repos:
if r.accessor().canEject():
r.accessor().eject()
# complete the installation:
fin_seq = getFinalisationSequence(answers)
executeSequence(fin_seq, "Completing installation...", answers, ui_package, True)
def configureMCELog(mounts):
"""Disable mcelog on unsupported processors."""
is_amd = False
model = 0
with open('/proc/cpuinfo', 'r') as f:
for line in f:
line = line.strip()
if re.match('vendor_id\s*:\s*AuthenticAMD$', line):
is_amd = True
continue
m = re.match('cpu family\s*:\s*(\d+)$', line)
if m:
model = int(m.group(1))
if is_amd and model >= 16:
util.runCmd2(['chroot', mounts['root'], 'systemctl', 'disable', 'mcelog'])
def rewriteNTPConf(root, ntp_servers):
ntpsconf = open("%s/etc/chrony.conf" % root, 'r')
lines = ntpsconf.readlines()
ntpsconf.close()
lines = [x for x in lines if not x.startswith('server ')]
ntpsconf = open("%s/etc/chrony.conf" % root, 'w')
for line in lines:
ntpsconf.write(line)
if ntp_servers:
for server in ntp_servers:
ntpsconf.write("server %s iburst\n" % server)
ntpsconf.close()
def setTimeNTP(ntp_servers, ntp_config_method):
if ntp_config_method in ("dhcp", "manual"):
rewriteNTPConf('', ntp_servers)
# This might fail or stall if the network is not set up correctly so set a
# time limit and don't expect it to succeed.
if util.runCmd2(['timeout', '15', 'chronyd', '-q']) == 0:
assert util.runCmd2(['hwclock', '--utc', '--systohc']) == 0
def setTimeManually(localtime, set_time_dialog_dismissed, timezone):
newtime = localtime + (datetime.datetime.now() - set_time_dialog_dismissed)
timestr = "%04d-%02d-%02d %02d:%02d:00" % \
(newtime.year, newtime.month, newtime.day,
newtime.hour, newtime.minute)
util.setLocalTime(timestr, timezone=timezone)
assert util.runCmd2(['hwclock', '--utc', '--systohc']) == 0
def setDHCPNTP(mounts, ntp_config_method):
script = os.path.join(mounts['root'], "etc/dhcp/dhclient.d/chrony.sh")
oldPermissions = os.stat(script).st_mode
if ntp_config_method == "dhcp":
newPermissions = oldPermissions | (stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH) # Add execute permission
else:
newPermissions = oldPermissions & ~(stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH) # Remove execute permission
os.chmod(script, newPermissions)
def configureNTP(mounts, ntp_config_method, ntp_servers):
# If NTP servers were specified, update the NTP config file:
if ntp_config_method in ("dhcp", "manual"):
rewriteNTPConf(mounts['root'], ntp_servers)
# now turn on the ntp service:
util.runCmd2(['chroot', mounts['root'], 'systemctl', 'enable', 'chronyd'])
util.runCmd2(['chroot', mounts['root'], 'systemctl', 'enable', 'chrony-wait'])
# This is attempting to understand the desired layout of the future partitioning
# based on options passed and status of disk (like partition to retain).
# This should be used for upgrade or install, not for restore.
# Returns 'target-boot-mode', 'boot-partnum', 'primary-partnum', 'backup-partnum', 'logs-partnum', 'swap-partnum', 'storage-partnum'
def partitionTargetDisk(disk, existing, preserve_first_partition, create_sr_part):
logger.log("Installer booted in %s mode" % ("UEFI" if constants.UEFI_INSTALLER else "legacy"))
primary_part = 1
if existing:
# upgrade, use existing partitioning scheme
tool = PartitionTool(existing.primary_disk)
primary_part = tool.partitionNumber(existing.root_device)
# Determine target install's boot mode and boot partition number
target_boot_mode = TARGET_BOOT_MODE_LEGACY
if existing.boot_device:
boot_partnum = tool.partitionNumber(existing.boot_device)
boot_part = tool.getPartition(boot_partnum)
if 'id' in boot_part and boot_part['id'] == GPTPartitionTool.ID_EFI_BOOT:
target_boot_mode = TARGET_BOOT_MODE_UEFI
else:
boot_partnum = primary_part + 3
if (target_boot_mode == TARGET_BOOT_MODE_UEFI and not constants.UEFI_INSTALLER) or \
(target_boot_mode == TARGET_BOOT_MODE_LEGACY and constants.UEFI_INSTALLER):
raise RuntimeError("Installer mode (%s) is mismatched with target boot mode (%s)" %
("UEFI" if constants.UEFI_INSTALLER else "legacy", target_boot_mode))
logger.log("Upgrading, target_boot_mode: %s" % target_boot_mode)
# Return install mode and numbers of boot, primary, backup, log, swap and SR partitions
storage_partition = tool.getPartition(primary_part+2)
if storage_partition:
return (target_boot_mode, boot_partnum, primary_part, primary_part+1, primary_part+4, primary_part+5, primary_part+2)
else:
return (target_boot_mode, boot_partnum, primary_part, primary_part+1, primary_part+4, primary_part+5, 0)
tool = PartitionTool(disk)
# Cannot preserve partition for legacy DOS partition table.
if tool.partTableType == constants.PARTITION_DOS :
if preserve_first_partition == 'true' or (
preserve_first_partition == constants.PRESERVE_IF_UTILITY and tool.utilityPartitions()):
raise RuntimeError("Preserving initial partition on DOS unsupported")
# Preserve any utility partitions unless user told us to zap 'em
primary_part = 1
if preserve_first_partition == 'true':
primary_part += 1
elif preserve_first_partition == constants.PRESERVE_IF_UTILITY:
utilparts = tool.utilityPartitions()
primary_part += max(utilparts+[0])
if primary_part > 2:
raise RuntimeError("Installer only supports a single Utility Partition at partition 1, but found Utility Partitions at %s" % str(utilparts))
sr_part = -1
if create_sr_part:
sr_part = primary_part+2
boot_part = max(primary_part + 1, sr_part) + 1
target_boot_mode = TARGET_BOOT_MODE_UEFI if constants.UEFI_INSTALLER else TARGET_BOOT_MODE_LEGACY
logger.log("Fresh install, target_boot_mode: %s" % target_boot_mode)
return (target_boot_mode, boot_part, primary_part, primary_part + 1, primary_part + 4, primary_part + 5, sr_part)
def removeBlockingVGs(disks):
for vg in diskutil.findProblematicVGs(disks):
util.runCmd2(['vgreduce', '--removemissing', vg])
util.runCmd2(['lvremove', vg])
util.runCmd2(['vgremove', vg])
###
# Functions to write partition tables to disk
def writeDom0DiskPartitions(disk, target_boot_mode, boot_partnum, primary_partnum, backup_partnum, logs_partnum, swap_partnum, storage_partnum, sr_at_end):
# we really don't want to screw this up...
assert type(disk) == str
assert disk[:5] == '/dev/'
if not os.path.exists(disk):
raise RuntimeError("The disk %s could not be found." % disk)
# If new partition layout requested: exit if disk is not big enough, otherwise implement it
elif diskutil.blockSizeToGBSize(diskutil.getDiskDeviceSize(disk)) < constants.min_primary_disk_size:
raise RuntimeError("The disk %s is smaller than %dGB." % (disk, constants.min_primary_disk_size))
tool = PartitionTool(disk, constants.PARTITION_GPT)
for num, part in tool.items():
if num >= primary_partnum:
tool.deletePartition(num)
order = primary_partnum
# Create the new partition layout (5,2,1,4,6,3)
# Normal layout
# 1 - dom0 partition
# 2 - backup partition
# 3 - LVM partition
# 4 - Boot partition
# 5 - logs partition
# 6 - swap partition
#
# Create logs partition
# Start the first partition at 1 MiB if there are no other partitions.
# Otherwise start the partition following the utility partition.
if order == 1:
tool.createPartition(tool.ID_LINUX, sizeBytes=logs_size * 2**20, startBytes=2**20, number=logs_partnum, order=order, label=logspart_label)
else:
tool.createPartition(tool.ID_LINUX, sizeBytes=logs_size * 2**20, number=logs_partnum, order=order, label=logspart_label)
order += 1
# Create backup partition
if backup_partnum > 0:
tool.createPartition(tool.ID_LINUX, sizeBytes=backup_size * 2**20, number=backup_partnum, order=order, label=backuppart_label)
order += 1
# Create dom0 partition
tool.createPartition(tool.ID_LINUX, sizeBytes=constants.root_size * 2**20, number=primary_partnum, order=order, label=rootpart_label)
order += 1
# Create Boot partition
if target_boot_mode == TARGET_BOOT_MODE_UEFI:
tool.createPartition(tool.ID_EFI_BOOT, sizeBytes=boot_size * 2**20, number=boot_partnum, order=order, label=bootpart_label)
else:
tool.createPartition(tool.ID_BIOS_BOOT, sizeBytes=boot_size * 2**20, number=boot_partnum, order=order, label=bootpart_label)
order += 1
# Create swap partition
tool.createPartition(tool.ID_LINUX_SWAP, sizeBytes=swap_size * 2**20, number=swap_partnum, order=order, label=swappart_label)
order += 1
# Create LVM partition
if storage_partnum > 0:
tool.createPartition(tool.ID_LINUX_LVM, number=storage_partnum, order=order, label=storagepart_label)
order += 1
if not sr_at_end:
# For upgrade testing, out-of-order partition layout
new_parts = {}
new_parts[primary_partnum] = {'start': tool.partitions[primary_partnum]['start'] + tool.partitions[storage_partnum]['size'],
'size': tool.partitions[primary_partnum]['size'],
'id': tool.partitions[primary_partnum]['id'],
'active': tool.partitions[primary_partnum]['active'],
'partlabel': tool.partitions[primary_partnum]['partlabel']}
if backup_partnum > 0:
new_parts[backup_partnum] = {'start': new_parts[primary_partnum]['start'] + new_parts[primary_partnum]['size'],
'size': tool.partitions[backup_partnum]['size'],
'id': tool.partitions[backup_partnum]['id'],
'active': tool.partitions[backup_partnum]['active'],
'partlabel': tool.partitions[backup_partnum]['partlabel']}
new_parts[storage_partnum] = {'start': tool.partitions[primary_partnum]['start'],
'size': tool.partitions[storage_partnum]['size'],
'id': tool.partitions[storage_partnum]['id'],
'active': tool.partitions[storage_partnum]['active'],
'partlabel': tool.partitions[storage_partnum]['partlabel']}
for part in (primary_partnum, backup_partnum, storage_partnum):
if part > 0:
tool.deletePartition(part)
tool.createPartition(new_parts[part]['id'], new_parts[part]['size'] * tool.sectorSize, part,
new_parts[part]['start'] * tool.sectorSize, new_parts[part]['active'],
new_parts[part]['partlabel'])
tool.commit(log=True)
def writeGuestDiskPartitions(primary_disk, guest_disks):
# At the moment this code uses the same partition table type for Guest Disks as it
# does for the root disk. But we could choose to always use 'GPT' for guest disks.
# TODO: Decide!
for gd in guest_disks:
if gd != primary_disk:
# we really don't want to screw this up...
assert type(gd) == str
assert gd[:5] == '/dev/'
tool = PartitionTool(gd, constants.PARTITION_GPT)
tool.deletePartitions(list(tool.partitions.keys()))
tool.commit(log=True)
def setActiveDiskPartition(disk, boot_partnum, primary_partnum):
tool = PartitionTool(disk, constants.PARTITION_GPT)
tool.commitActivePartitiontoDisk(boot_partnum)
def getSRPhysDevs(primary_disk, storage_partnum, guest_disks):
def sr_partition(disk):
if disk == primary_disk:
return partitionDevice(disk, storage_partnum)
else:
return disk
return [sr_partition(disk) for disk in guest_disks]
def prepareStorageRepositories(mounts, primary_disk, storage_partnum, guest_disks, sr_type):
if len(guest_disks) == 0 or constants.CC_PREPARATIONS and sr_type != constants.SR_TYPE_EXT:
logger.log("No storage repository requested.")
return None
logger.log("Arranging for storage repositories to be created at first boot...")
partitions = getSRPhysDevs(primary_disk, storage_partnum, guest_disks)
# write a config file for the prepare-storage firstboot script:
links = [diskutil.idFromPartition(x) or x for x in partitions]
fd = open(os.path.join(mounts['root'], constants.FIRSTBOOT_DATA_DIR, 'default-storage.conf'), 'w')
print("XSPARTITIONS='%s'" % str.join(" ", links), file=fd)
print("XSTYPE='%s'" % sr_type, file=fd)
# Legacy names
print("PARTITIONS='%s'" % str.join(" ", links), file=fd)
print("TYPE='%s'" % sr_type, file=fd)
fd.close()
def make_free_space(mount, required):
"""Make required bytes of free space available on mount by removing files,
oldest first."""
def getinfo(dirpath, name):
path = os.path.join(dirpath, name)
return os.stat(path).st_mtime, path
def free_space(path):
st = os.statvfs(path)
return st.f_bavail * st.f_frsize
if free_space(mount) >= required:
return
files = []
dirs = []
for dirpath, dirnames, filenames in os.walk(mount):
for i in dirnames:
dirs.append(getinfo(dirpath, i))
for i in filenames:
files.append(getinfo(dirpath, i))
files.sort()
dirs.sort()
for _, path in files:
os.unlink(path)
logger.log('Removed %s' % path)
if free_space(mount) >= required:
return
for _, path in dirs:
shutil.rmtree(path, ignore_errors=True)
logger.log('Removed %s' % path)
if free_space(mount) >= required:
return
raise RuntimeError("Failed to make enough space available on %s (%d, %d)" % (mount, required, free_space(mount)))
###
# Create dom0 disk file-systems:
def createDom0DiskFilesystems(install_type, disk, target_boot_mode, boot_partnum, primary_partnum, logs_partnum, disk_label_suffix):
if target_boot_mode == TARGET_BOOT_MODE_UEFI:
partition = partitionDevice(disk, boot_partnum)
try:
util.mkfs(bootfs_type, partition,
["-n", bootfs_label%disk_label_suffix.upper()])
except Exception as e:
raise RuntimeError("Failed to create boot filesystem: %s" % e)
partition = partitionDevice(disk, primary_partnum)
try:
util.mkfs(rootfs_type, partition,
["-L", rootfs_label%disk_label_suffix])
except Exception as e:
raise RuntimeError("Failed to create root filesystem: %s" % e)
tool = PartitionTool(disk)
logs_partition = tool.getPartition(logs_partnum)
if logs_partition:
run_mkfs = True
# If the log partition already exists and is formatted correctly,
# relabel it. Otherwise create the filesystem.
partition = partitionDevice(disk, logs_partnum)
label = None
try:
label = diskutil.readExtPartitionLabel(partition)
except Exception as e:
# Ignore the exception as it just means the partition needs to be
# formatted.
pass
if install_type != INSTALL_TYPE_FRESH and label and label.startswith(logsfs_label_prefix):
# If a filesystem which has not been unmounted cleanly is
# relabelled, it will revert to the original label once it is
# mounted. To prevent this, fsck the filesystem before relabelling.
# If any unfixable errors occur or relabelling fails, just recreate
# the filesystem instead, rather than fail the installation.
if util.runCmd2(['e2fsck', '-y', partition]) in (0, 1):
if util.runCmd2(['e2label', partition, constants.logsfs_label % disk_label_suffix]) == 0:
run_mkfs = False
if run_mkfs:
try:
util.mkfs(logsfs_type, partition,
["-L", logsfs_label % disk_label_suffix])
except Exception as e:
raise RuntimeError("Failed to create logs filesystem: %s" % e)
else:
# Ensure enough free space is available
mount = util.TempMount(partition, 'logs-')
try:
make_free_space(mount.mount_point, constants.logs_free_space * 1024 * 1024)
finally:
mount.unmount()
def __mkinitrd(mounts, partition, package, kernel_version, fcoe_interfaces):
if isDeviceMapperNode(partition):
# Generate a valid multipath configuration for the initrd
action = 'generate-fcoe' if fcoe_interfaces else 'generate-bfs'
if util.runCmd2(['chroot', mounts['root'],
'/etc/init.d/sm-multipath', action]) != 0:
raise RuntimeError("Failed to generate multipath configuration")
# Run dracut inside dom0 chroot
output_file = os.path.join("/boot", "initrd-%s.img" % kernel_version)
# default to only including host specific kernel modules in initrd
# disable multipath on root partition
try:
if not isDeviceMapperNode(partition):
f = open(os.path.join(mounts['root'], 'etc/dracut.conf.d/xs_disable_multipath.conf'), 'w')
f.write('omit_dracutmodules+=" multipath "\n')
f.close()
except:
pass
cmd = ['dracut', output_file, kernel_version]
if util.runCmd2(['chroot', mounts['root']] + cmd) != 0:
raise RuntimeError("Failed to create initrd for %s. This is often due to using an installer that is not the same version of %s as your installation source." % (kernel_version, MY_PRODUCT_BRAND))
def getXenVersion(rootfs_mount):
""" Return the xen version by interogating the package version in the chroot """
xen_version = ['rpm', '--root', rootfs_mount, '-q', '--qf', '%{version}', 'xen-hypervisor']
rc, out = util.runCmd2(xen_version, with_stdout=True)
if rc != 0:
return None
return out
def getKernelVersion(rootfs_mount):
""" Returns the kernel release (uname -r) of the installed kernel """
kernel_version = ['rpm', '--root', rootfs_mount, '-q', '--provides', 'kernel']
rc, out = util.runCmd2(kernel_version, with_stdout=True)
if rc != 0:
return None
try:
uname_provides = [x for x in out.split('\n') if x.startswith('kernel-uname-r')]
return uname_provides[0].split('=')[1].strip()
except:
pass
return None
def kernelShortVersion(version):
""" Return the short kernel version string (i.e., just major.minor). """
parts = version.split(".")
return parts[0] + "." + parts[1]
def configureSRMultipathing(mounts, primary_disk):
# Only called on fresh installs:
# Configure multipathed SRs iff root disk is multipathed
fd = open(os.path.join(mounts['root'], constants.FIRSTBOOT_DATA_DIR, 'sr-multipathing.conf'),'w')
if isDeviceMapperNode(primary_disk):
fd.write("MULTIPATHING_ENABLED='True'\n")
else:
fd.write("MULTIPATHING_ENABLED='False'\n")
fd.close()
def adjustISCSITimeoutForFile(path):
iscsiconf = open(path, 'r')
lines = iscsiconf.readlines()
iscsiconf.close()
timeout_key = "node.session.timeo.replacement_timeout"
wrote_key = False
iscsiconf = open(path, 'w')
for line in lines:
if line.startswith(timeout_key):
iscsiconf.write("%s = %d\n" % (timeout_key, MPATH_ISCSI_TIMEOUT))
wrote_key = True
else:
iscsiconf.write(line)
if not wrote_key:
iscsiconf.write("%s = %d\n" % (timeout_key, MPATH_ISCSI_TIMEOUT))
iscsiconf.close()
def configureISCSI(mounts, primary_disk):
if not diskutil.is_iscsi(primary_disk):
return
iname = diskutil.get_initiator_name()
with open(os.path.join(mounts['root'], 'etc/iscsi/initiatorname.iscsi'), 'w') as f:
f.write('InitiatorName=%s\n' % (iname,))
# Create IQN file for XAPI
with open(os.path.join(mounts['root'], 'etc/firstboot.d/data/iqn.conf'), 'w') as f:
f.write("IQN='%s'" % iname)
if util.runCmd2(['chroot', mounts['root'],
'systemctl', 'enable', 'iscsid']):
raise RuntimeError("Failed to enable iscsid")
if util.runCmd2(['chroot', mounts['root'],
'systemctl', 'enable', 'iscsi']):
raise RuntimeError("Failed to enable iscsi")
diskutil.write_iscsi_records(mounts, primary_disk)
# Reduce the timeout when using multipath
if isDeviceMapperNode(primary_disk):
adjustISCSITimeoutForFile("%s/etc/iscsi/iscsid.conf" % mounts['root'])
def mkinitrd(mounts, primary_disk, primary_partnum, fcoe_interfaces):
xen_version = getXenVersion(mounts['root'])
if xen_version is None:
raise RuntimeError("Unable to determine Xen version.")
xen_kernel_version = getKernelVersion(mounts['root'])
if not xen_kernel_version:
raise RuntimeError("Unable to determine kernel version.")
partition = partitionDevice(primary_disk, primary_partnum)
__mkinitrd(mounts, partition, 'kernel-xen', xen_kernel_version, fcoe_interfaces)
def prepFallback(mounts, primary_disk, primary_partnum):
kernel_version = getKernelVersion(mounts['root'])
# Copy /boot/xen-xxxx.gz to /boot/xen-fallback.gz
xen_gz = os.path.realpath(mounts['root'] + "/boot/xen.gz")
src = os.path.join(mounts['root'], "boot", os.path.basename(xen_gz))
dst = os.path.join(mounts['root'], 'boot/xen-fallback.gz')
shutil.copyfile(src, dst)
# Copy /boot/vmlinuz-yyyy to /boot/vmlinuz-fallback
src = os.path.join(mounts['root'], 'boot/vmlinuz-%s' % kernel_version)
dst = os.path.join(mounts['root'], 'boot/vmlinuz-fallback')
shutil.copyfile(src, dst)
# Extra modules to include in the fallback initrd. Include all
# currently loaded modules so the network module is picked up.
modules = []
proc_modules = open('/proc/modules', 'r')
for line in proc_modules:
modules.append(line.split(' ')[0])
proc_modules.close()
# Generate /boot/initrd-fallback.img.
cmd = ['dracut', '--verbose', '--add-drivers', ' '.join(modules), '--no-hostonly']
cmd += ['/boot/initrd-fallback.img', kernel_version]
if util.runCmd2(['chroot', mounts['root']] + cmd):
raise RuntimeError("Failed to generate fallback initrd")
def buildBootLoaderMenu(mounts, xen_version, xen_kernel_version, boot_config, serial, boot_serial, host_config, primary_disk, disk_label_suffix, fcoe_interfaces):
short_version = kernelShortVersion(xen_kernel_version)
common_xen_params = "dom0_mem=%dM,max:%dM" % ((host_config['dom0-mem'],) * 2)
common_xen_unsafe_params = "watchdog ucode=scan dom0_max_vcpus=1-%d" % host_config['dom0-vcpus']
safe_xen_params = ("nosmp noreboot noirqbalance no-mce no-bootscrub "
"no-numa no-hap no-mmcfg max_cstate=0 "
"nmi=ignore allow_unsafe")
xen_mem_params = "crashkernel=256M,below=4G"
# CA-103933 - AMD PCI-X Hypertransport Tunnel IOAPIC errata