def logPartitioningScheme():
"""
Logs all disks state
@rtype: tuple
@returns: (status, output) of command
"""
return getstatusoutput(CMD_LIST_ALL)
def detectPowerKVMInstalledDisk(self, boot_parts=None):
"""Detect the partition where PowerKVM is installed.
@rtype: String
@return: The disk PowerKVM is installed or None if none found"""
if boot_parts == None:
self.__logger.debug("detectPowerKVMInstalledDisk(): boot_parts == None")
return None
# We need to run pvscan and try to find any of boot_parts in
# its output. If matched, it's the disk to be used during
# reinstall.
#
# For example:
#
# bash-4.2# pvscan
# No matching physical volumes found
#
# bash-4.2# pvscan
# PV /dev/sda6 VG ibmpkvm_vg_log lvm2 [10.00 GiB / 0 free]
# PV /dev/sda5 VG ibmpkvm_vg_root lvm2 [20.00 GiB / 0 free]
# PV /dev/sda8 VG ibmpkvm_vg_data lvm2 [41.48 GiB / 0 free]
# PV /dev/sda7 VG ibmpkvm_vg_swap lvm2 [8.00 GiB / 0 free]
# Total: 4 [79.47 GiB] / in use: 4 [79.47 GiB] / in no VG: 0 [0 ]
ret, output = getstatusoutput("pvscan")
self.__logger.debug("detectPowerKVMInstalledDisk(): pvscan return: {0}".format(ret))
self.__logger.debug("detectPowerKVMInstalledDisk(): pvscan output:\n{0}".format(output))
if NO_PHYSICAL_VOLUMES_FOUND in output:
self.__logger.debug("detectPowerKVMInstalledDisk(): no physical volumes found")
return None
# remove numbers from boot_parts, thus we'll have a list of disk names
disks = [''.join([c for c in part if not c.isdigit()]) for part in boot_parts]
pkvm_installed_disk = None
# parse pvscan output
for line in output.split('\n'):
if VGROOT in line:
root_part = line.split()[1]
pv_name = ''.join([c for c in root_part if not c.isdigit()])
self.__logger.debug("detectPowerKVMInstalledDisk(): pv_name = {0}".format(pv_name))
for disk in disks:
self.__logger.debug("detectPowerKVMInstalledDisk(): disk = {0}".format(disk))
if disk == pv_name:
self.__logger.debug("detectPowerKVMInstalledDisk(): disk == pv_name")
pkvm_installed_disk = pv_name
return pkvm_installed_disk
def _runPartedCommand(partedCommand, disk, errorMessage, hasMultipath=False, tolerant=False):
"""
Runs a parted command and re-read disk partition table.
@type partedCommand: basestring
@param partedCommand: parted command to run
@type disk: basestring
@param disk: disk path
@type errorMessage: basestring
@param errorMessage: error message to user in case of a failure
@type hasMultipath: bool
@param hasMultipath: flag that informs if system has multipath
@type tolerant: bool
@param tolerant: True to not exit if error found, False otherwise
@rtype: None
@returns: nothing
"""
# runs command
(status, output) = getstatusoutput(partedCommand)
# log command line
llecho("Running: %s" % partedCommand)
# log exit status and output
llecho("Status: %d" % status)
llecho("Output:\n%s\n" % output)
if hasMultipath:
return
# FIXME: use a safer check here, i.e., a regular expression to match the
# desired output.
# partition table needs to be re-read: do it
if 're-read' in output:
# partition table was successfully re-read: change status accordingly
if _reReadPartitionTable(disk, hasMultipath):
status = 0
# command failed: log and exit
if status != 0:
llecho(errorMessage)
if not tolerant:
sys.exit(1)
def _hasValidDiskLabel(disk):
"""
Informs if the disk has a valid disk label.
@type disk: basestring
@param disk: disk path
@rtype: bool
@returns: True if the disk has a valid label, False otherwise
"""
# get disk label through blkid
(status, output) = getstatusoutput(CMD_CHECK_PARTITION % {'disk': disk})
# could not get disk label or it is invalid: return False
if status != 0 or output.strip() != 'dos':
return False
# valid disk label: return True
return True
