def __clearDisks(self, hasMultipath):
"""
Clears all disks of the system. This cleaning will erase ALL DATA of the
disks. There is no step back.
@rtype: None
@return: Nothing
"""
try:
# bug 109358: try to stop all raid partitions. it should be done first
# in a scenario where there is a LVM on top of a SW RAID. However, in
# a opposite way (RAID on top of LVM) it will fail. So we just let pass
# any exception from sw raid.
try:
raid.stop()
except:
pass
# delete LVM entities before partitioning
self.__logger.info('Deleting LVM entities...')
self.__logger.debug('PV Delete List: %s' % str(self.__pvDeleteList))
self.__logger.debug('VG Delete List: %s' % str(self.__vgDeleteList))
self.__logger.debug('LV Delete List: %s' % str(self.__lvDeleteList))
lvm.delLvmEntities(self.__pvDeleteList,
self.__vgDeleteList,
self.__lvDeleteList)
# stop LVM volume groups to avoid problems with disks partitioning
self.__logger.info('Stopping LVM...')
lvm.stop()
# Bug 109358: if SW RAID is on top a LVM we can stop it safetly now
# because LVM was just stopped above. If any problem happens from now
# on we need to let the exception raises above.
raid.stop()
except PKVMError as e:
raise
except Exception as e:
self.__logger.critical("Unexpected error")
self.__logger.critical("EXCEPTION:" + str(type(e)))
self.__logger.critical(str(e))
self.__logger.critical("Stacktrace:" + str(traceback.format_exc()))
raise PKVMError("PARTITIONER", "ERROR", "ERROR")
# perform custom setup for multipath devices
self.__logger.info('Performing custom multipath configuration...')
self.__logger.debug('Has multipath = %s' % str(hasMultipath))
tolerantMode = multipath.setup(hasMultipath,
bool(len(self.__lvmCommands)),
bool(len(self.__raidCommands)),
self.__tolerantMode)
# wait for udev to handle all events
run(CMD_UDEV_SETTLE)
def resetRootDevice(self):
"""
Formats root device (according LVM default scheme) and adjusts all
pointers to allow reinstall the system correctly.
Important: this method is directly related to LVM default partitioning
scheme. It assumes that root device is under /dev/mapper/vg_root-lv_root
path. If this default scheme changes on future, this method must be
revisited to assure its functionality.
@rtype: bool
@return: True if everything is ok, False otherwise
"""
# restart LVM volume groups to assure its functionality
self.__logger.info('Restarting LVM...')
lvm.stop()
lvm.start(self.__tolerantMode)
# wait for udev to handle all events
if run(CMD_UDEV_SETTLE) != 0:
raise RuntimeError('Error: udevadm settle failure')
# Do not trust content from / partition. User can screw up
# with its / partition and try a reinstall to fix it. Thus
# our code cannot trust on reading content from old and dirty
# / partition. We can just infere /boot partition by
# appending 2 to the detected disk.
installed_disk = self.getPreviousInstalledDisk()
boot_partition = self.genBootPartitionName(installed_disk)
self.__bootDevice = boot_partition
# check multipath
self.__hasMultipath = self.__diskParameters[installed_disk.split('/')[-1]]['mpath']
# as consequence, configure prep device path
self.__prepDevice = self.__bootDevice[:-1] + "1"
# update root, log, data and swap paths
self.__rootDevice = '/dev/mapper/%s-%s' % (VGROOT, LVROOT)
self.__logDevice = '/dev/mapper/%s-%s' % (VGLOG, LVLOG)
self.__dataDevice = '/dev/mapper/%s-%s' % (VGDATA, LVDATA)
self.__swapDevice = '/dev/mapper/%s-%s' % (VGSWAP, LVSWAP)
self.__logger.debug("resetRootDevice(): __prepDevice = %s" % self.__prepDevice)
self.__logger.debug("resetRootDevice(): __bootDevice = %s" % self.__bootDevice)
self.__logger.debug("resetRootDevice(): __rootDevice = %s" % self.__rootDevice)
self.__logger.debug("resetRootDevice(): __logDevice = %s" % self.__logDevice)
self.__logger.debug("resetRootDevice(): __dataDevice = %s" % self.__dataDevice)
self.__logger.debug("resetRootDevice(): __swapDevice = %s" % self.__swapDevice)
# format boot, root and swap devices
formatPartition(self.__bootDevice)
formatPartition(self.__rootDevice)
formatSwapPartition(self.__swapDevice)
return True
def __createLVMEntities(self, hasMultipath):
"""
Calls methods to create LVM entities on system. This method creates all
required physical volumns, volumn groups and logical volumns to install
the system.
@rtype: None
@return: Nothing
"""
# can't create PVs: abort
self.__logger.info('Creating physical volumns...')
self.__logger.debug('LVM PV Create List:\n%s' % str(self.__pvCreateList))
if not lvm.createPVs(self.__pvCreateList, hasMultipath):
raise PKVMError("PARTITIONER", "LVM", "CREATE_LVM")
# can't create VGs: abort
self.__logger.info('Creating volumn groups...')
self.__logger.debug('LVM VG Create List:\n%s' % str(self.__vgCreateList))
if not lvm.createVGs(self.__vgCreateList, hasMultipath):
raise PKVMError("PARTITIONER", "LVM", "CREATE_LVM")
# can't create LVs: abort
self.__logger.info('Creating logical volumns...')
self.__logger.debug('LVM LV Create List:\n%s' % str(self.__lvCreateList))
if not lvm.createLVs(self.__lvCreateList):
raise PKVMError("PARTITIONER", "LVM", "CREATE_LVM")
# can't resize LVM entities: abort
self.__logger.info('Resizing LVMs entities...')
self.__logger.debug('LVM Reuse List:\n%s' % str(self.__lvUseList))
if not lvm.resizeLVs(self.__lvUseList):
raise PKVMError("PARTITIONER", "LVM", "CREATE_LVM")
# can't adjust PVs: abort
self.__logger.info('Adjusting physical volumns...')
self.__logger.debug('LVM Adjust PVs List:\n%s' % str(self.__vgUseList))
if not lvm.adjustPVs(self.__vgUseList, hasMultipath):
raise PKVMError("PARTITIONER", "LVM", "CREATE_LVM")
# restart LVM volume groups to avoid any problems later
self.__logger.info('Restarting LVM...')
lvm.stop()
lvm.start(self.__tolerantMode)
