def _disable_lvm2_lvmetad(ssh):
"""Disables lvm2-lvmetad service. This service is responsible
for automatically activating LVM2 volume groups when a disk is
attached or when a volume group is created. During disk replication
this service needs to be disabled.
"""
cfg = "/etc/lvm/lvm.conf"
if utils.test_ssh_path(ssh, cfg):
utils.exec_ssh_cmd(
ssh,
'sudo sed -i "s/use_lvmetad.*=.*1/use_lvmetad = 0/g" '
'%s' % cfg, get_pty=True)
# NOTE: lvm2-lvmetad is the name of the lvmetad service
# on both debian and RHEL based systems. It needs to be stopped
# before we begin disk replication. We disable it in the config
# just in case some other process starts the daemon later on, as
# a dependency. As the service may not actually exist, even though
# the config is present, we ignore errors when stopping it.
utils.ignore_exceptions(utils.exec_ssh_cmd)(
ssh, "sudo service lvm2-lvmetad stop", get_pty=True)
# disable volume groups. Any volume groups that have volumes in use
# will remain online. However, volume groups belonging to disks
# that have been synced at least once, will be deactivated.
utils.ignore_exceptions(utils.exec_ssh_cmd)(
ssh, "sudo vgchange -an", get_pty=True)
def _find_and_mount_root(self, devices):
files = ["etc", "bin", "sbin", "boot"]
os_root_dir = None
os_root_device = self._find_dev_with_contents(devices, all_files=files)
if os_root_device is None:
raise exception.OperatingSystemNotFound(
"Coriolis was unable to identify the root partition of the OS "
"being migrated for mounting during OSMorphing. Please ensure "
"that the source VM's root partition(s) are not encrypted, "
"and that they are using a filesystem type and version which "
"is supported by the OS images used for the OSMorphing minion "
"machine. Also ensure that the source VM's mountpoint "
"declarations in '/etc/fstab' are all correct, and are "
"declared using '/dev/disk/by-uuid/' or 'UUID=' notation. "
"If all else fails, please retry while using an OSMorphing "
"minion machine image which is the same OS release as the VM "
"being migrated.")
try:
tmp_dir = self._exec_cmd('mktemp -d').decode().splitlines()[0]
self._exec_cmd('sudo mount %s %s' % (os_root_device, tmp_dir))
os_root_dir = tmp_dir
except Exception as ex:
self._event_manager.progress_update(
"Exception occurred while Coriolis was attempting to mount the"
" root device (%s) of the OS being migrated for OSMorphing. "
"Please ensure that the source VM's root partition(s) are "
"using a filesystem type and version which is supported by the"
" OS images used for the OSMorphing minion machine. Also "
"ensure that the source VM's mountpoint declarations in "
"'/etc/fstab' are all correct, and are declared using "
"'/dev/disk/by-uuid/' or 'UUID=' notation. If all else fails, "
"please retry while using an OSMorphing minion machine image "
"which is the same OS release as the VM being migrated. Error "
"was: %s" % (os_root_device, str(ex)))
LOG.error(ex)
LOG.warn("Failed to mount root device '%s':\n%s", os_root_device,
utils.get_exception_details())
utils.ignore_exceptions(self._exec_cmd)("sudo umount %s" % tmp_dir)
utils.ignore_exceptions(self._exec_cmd)("sudo rmdir %s" % tmp_dir)
raise
for directory in ['proc', 'sys', 'dev', 'run']:
mount_dir = os.path.join(os_root_dir, directory)
if not utils.test_ssh_path(self._ssh, mount_dir):
LOG.info("No '%s' directory in mounted OS. Skipping mount.",
directory)
continue
self._exec_cmd('sudo mount -o bind /%(dir)s/ %(mount_dir)s' % {
'dir': directory,
'mount_dir': mount_dir
})
if os_root_device in devices:
devices.remove(os_root_device)
return os_root_dir, os_root_device
def _find_dev_with_contents(self, devices, all_files=None,
one_of_files=None):
if all_files and one_of_files:
raise exception.CoriolisException(
"all_files and one_of_files are mutually exclusive")
dev_name = None
for dev_path in devices:
dirs = None
tmp_dir = self._exec_cmd('mktemp -d').decode().splitlines()[0]
try:
self._exec_cmd('sudo mount %s %s' % (dev_path, tmp_dir))
# NOTE: it's possible that the device was mounted successfully
# but an I/O error occurs later along the line:
dirs = utils.list_ssh_dir(self._ssh, tmp_dir)
except Exception:
self._event_manager.progress_update(
"Failed to mount and scan device '%s'" % dev_path)
LOG.warn(
"Failed to mount and scan device '%s':\n%s",
dev_path, utils.get_exception_details())
utils.ignore_exceptions(self._exec_cmd)(
"sudo umount %s" % tmp_dir
)
utils.ignore_exceptions(self._exec_cmd)(
"sudo rmdir %s" % tmp_dir
)
continue
LOG.debug("Contents of device %s:\n%s", dev_path, dirs)
if all_files and dirs:
common = [i if i in dirs else None for i in all_files]
if not all(common):
self._exec_cmd('sudo umount %s' % tmp_dir)
continue
dev_name = dev_path
self._exec_cmd('sudo umount %s' % tmp_dir)
elif one_of_files and dirs:
common = [i for i in one_of_files if i in dirs]
if len(common) > 0:
dev_name = dev_path
self._exec_cmd('sudo umount %s' % tmp_dir)
break
else:
self._exec_cmd('sudo umount %s' % tmp_dir)
continue
return dev_name
def _find_and_mount_root(self, devices):
files = ["etc", "bin", "sbin", "boot"]
os_root_dir = None
os_root_device = self._find_dev_with_contents(
devices, all_files=files)
if os_root_device is None:
raise exception.OperatingSystemNotFound(
"root partition not found")
try:
tmp_dir = self._exec_cmd('mktemp -d').decode().splitlines()[0]
self._exec_cmd('sudo mount %s %s' % (os_root_device, tmp_dir))
os_root_dir = tmp_dir
except Exception:
self._event_manager.progress_update(
"Failed to mount root device '%s'" % os_root_device)
LOG.warn(
"Failed to mount root device '%s':\n%s",
os_root_device, utils.get_exception_details())
utils.ignore_exceptions(self._exec_cmd)(
"sudo umount %s" % tmp_dir
)
utils.ignore_exceptions(self._exec_cmd)(
"sudo rmdir %s" % tmp_dir
)
raise
for directory in ['proc', 'sys', 'dev', 'run']:
mount_dir = os.path.join(os_root_dir, directory)
if not utils.test_ssh_path(self._ssh, mount_dir):
LOG.info(
"No '%s' directory in mounted OS. Skipping mount.",
directory)
continue
self._exec_cmd(
'sudo mount -o bind /%(dir)s/ %(mount_dir)s' %
{'dir': directory, 'mount_dir': mount_dir})
if os_root_device in devices:
devices.remove(os_root_device)
return os_root_dir, os_root_device
def _reconnect_ssh(self):
if self._ssh:
utils.ignore_exceptions(self._ssh.close)()
self._ssh = self._setup_ssh()
return self._ssh
def __del__(self):
if self._cert_dir is not None:
utils.ignore_exceptions(shutil.rmtree)(self._cert_dir)