def get_os_morphing_tools_helper(conn, os_morphing_tools_clss, hypervisor_type,
os_type, os_root_dir, os_root_dev,
event_manager):
if os_type and os_type not in os_morphing_tools_clss:
raise exception.OSMorphingToolsNotFound("Unsupported OS type: %s" %
os_type)
for cls in os_morphing_tools_clss.get(
os_type, itertools.chain(*os_morphing_tools_clss.values())):
LOG.debug("Loading osmorphing instance: %s", cls)
tools = cls(conn, os_root_dir, os_root_dev, hypervisor_type,
event_manager)
LOG.debug("Testing OS morphing tools: %s", cls.__name__)
os_info = tools.check_os()
if os_info:
return (tools, os_info)
raise exception.OSMorphingToolsNotFound()
def get_os_morphing_tools(self, os_type, osmorphing_info):
""" Returns a list of possible OSMorphing classes for the given
os type and osmorphing info.
The OSMorphing classes will be asked to validate compatibility
in order using their `check_os` method in order, so any classes whose
`check_os` classmethods might both return a positive result should be
placed in the correct order (from more specific to less specific).
"""
raise exception.OSMorphingToolsNotFound(os_type=os_type)
def get_os_morphing_tools(self, conn, osmorphing_info):
raise exception.OSMorphingToolsNotFound()
def morph_image(origin_provider, destination_provider, connection_info,
osmorphing_info, user_script, event_handler):
event_manager = events.EventManager(event_handler)
os_type = osmorphing_info.get('os_type')
ignore_devices = osmorphing_info.get('ignore_devices', [])
# instantiate and run OSMount tools:
os_mount_tools = osmount_factory.get_os_mount_tools(
os_type, connection_info, event_manager, ignore_devices,
CONF.default_osmorphing_operation_timeout)
proxy_settings = _get_proxy_settings()
os_mount_tools.set_proxy(proxy_settings)
LOG.info("Preparing for OS partitions discovery")
try:
os_mount_tools.setup()
except Exception as err:
raise exception.CoriolisException(
"Failed to set up the minion machine for OSMorphing. This may be "
"due to an incompatibility between the OS image used for the "
"OSMorphing minion machine and the VM undergoing OSMorphing. "
"Error was: %s" % str(err)) from err
event_manager.progress_update("Discovering and mounting OS partitions")
os_root_dir, os_root_dev = os_mount_tools.mount_os()
osmorphing_info['os_root_dir'] = os_root_dir
osmorphing_info['os_root_dev'] = os_root_dev
conn = os_mount_tools.get_connection()
environment = os_mount_tools.get_environment()
detected_os_info = run_os_detect(origin_provider,
destination_provider,
conn,
os_type,
os_root_dir,
osmorphing_info,
tools_environment=environment)
# TODO(aznashwan):
# - export the source hypervisor type option in the VM's export info
# - automatically detect the target hypervisor type from the worker VM
hypervisor_type = osmorphing_info.get('hypervisor_type', None)
osmorphing_parameters = osmorphing_info.get('osmorphing_parameters', {})
export_os_morphing_tools = None
try:
export_tools_cls = get_osmorphing_tools_class_for_provider(
origin_provider, detected_os_info, os_type, osmorphing_info)
if export_tools_cls:
LOG.info(
"Instantiating OSMorphing tools class '%s' for export provider"
" '%s'", export_tools_cls.__name__, type(origin_provider))
export_os_morphing_tools = export_tools_cls(
conn, os_root_dir, os_root_dev, hypervisor_type, event_manager,
detected_os_info, osmorphing_parameters,
CONF.default_osmorphing_operation_timeout)
export_os_morphing_tools.set_environment(environment)
else:
LOG.debug(
"No compatible OSMorphing tools class found for export provider "
"'%s'",
type(origin_provider).__name__)
except exception.OSMorphingToolsNotFound:
LOG.warn("No tools found for export provider of type: %s",
type(origin_provider))
import_os_morphing_tools_cls = get_osmorphing_tools_class_for_provider(
destination_provider, detected_os_info, os_type, osmorphing_info)
if not import_os_morphing_tools_cls:
LOG.error(
"No compatible OSMorphing tools found from import provider '%s' "
"for the given detected OS info %s", type(destination_provider),
detected_os_info)
raise exception.OSMorphingToolsNotFound(os_type=os_type)
import_os_morphing_tools = import_os_morphing_tools_cls(
conn, os_root_dir, os_root_dev, hypervisor_type, event_manager,
detected_os_info, osmorphing_parameters,
CONF.default_osmorphing_operation_timeout)
import_os_morphing_tools.set_environment(environment)
if user_script:
event_manager.progress_update('Running OS morphing user script')
import_os_morphing_tools.run_user_script(user_script)
else:
event_manager.progress_update('No OS morphing user script specified')
event_manager.progress_update('OS being migrated: %s' %
detected_os_info['friendly_release_name'])
(packages_add, _) = import_os_morphing_tools.get_packages()
if export_os_morphing_tools:
(_, packages_remove) = export_os_morphing_tools.get_packages()
# Don't remove packages that need to be installed
packages_remove = list(set(packages_remove) - set(packages_add))
LOG.info("Pre packages uninstall")
export_os_morphing_tools.pre_packages_uninstall(packages_remove)
if packages_remove:
event_manager.progress_update("Removing packages: %s" %
str(packages_remove))
export_os_morphing_tools.uninstall_packages(packages_remove)
LOG.info("Post packages uninstall")
export_os_morphing_tools.post_packages_uninstall(packages_remove)
LOG.info("Pre packages install")
import_os_morphing_tools.pre_packages_install(packages_add)
nics_info = osmorphing_info.get('nics_info')
set_dhcp = osmorphing_info.get('nics_set_dhcp', True)
import_os_morphing_tools.set_net_config(nics_info, dhcp=set_dhcp)
LOG.info("Pre packages")
if packages_add:
event_manager.progress_update("Adding packages: %s" %
str(packages_add))
import_os_morphing_tools.install_packages(packages_add)
LOG.info("Post packages install")
import_os_morphing_tools.post_packages_install(packages_add)
event_manager.progress_update("Dismounting OS partitions")
try:
os_mount_tools.dismount_os(os_root_dir)
except Exception as err:
raise exception.CoriolisException(
"Failed to dismount the OS undergoing OSMorphing. This could have "
"been caused by minor FS corruption during the last disk sync. "
"Please ensure that any source-side FS integrity mechanisms (e.g. "
"filesystem quiescing, crash-consistent backups, etc.) are "
"enabled and available for the source machine. If none are "
"available, please try migrating/replicating the source machine "
"while it is powered off. Error was: %s" % str(err)) from err
def morph_image(origin_provider, destination_provider, connection_info,
osmorphing_info, user_script, event_handler):
event_manager = events.EventManager(event_handler)
os_type = osmorphing_info.get('os_type')
ignore_devices = osmorphing_info.get('ignore_devices', [])
# instantiate and run OSMount tools:
os_mount_tools = osmount_factory.get_os_mount_tools(
os_type, connection_info, event_manager, ignore_devices)
proxy_settings = _get_proxy_settings()
os_mount_tools.set_proxy(proxy_settings)
LOG.info("Preparing for OS partitions discovery")
os_mount_tools.setup()
event_manager.progress_update("Discovering and mounting OS partitions")
os_root_dir, os_root_dev = os_mount_tools.mount_os()
osmorphing_info['os_root_dir'] = os_root_dir
osmorphing_info['os_root_dev'] = os_root_dev
conn = os_mount_tools.get_connection()
environment = os_mount_tools.get_environment()
detected_os_info = run_os_detect(origin_provider,
destination_provider,
conn,
os_type,
os_root_dir,
osmorphing_info,
tools_environment=environment)
# TODO(aznashwan):
# - export the source hypervisor type option in the VM's export info
# - automatically detect the target hypervisor type from the worker VM
hypervisor_type = osmorphing_info.get('hypervisor_type', None)
export_os_morphing_tools = None
try:
export_tools_cls = get_osmorphing_tools_class_for_provider(
origin_provider, detected_os_info, os_type, osmorphing_info)
if export_tools_cls:
LOG.info(
"Instantiating OSMorphing tools class '%s' for export provider"
" '%s'", export_tools_cls.__name__, type(origin_provider))
export_os_morphing_tools = export_tools_cls(
conn, os_root_dir, os_root_dev, hypervisor_type, event_manager,
detected_os_info)
export_os_morphing_tools.set_environment(environment)
else:
LOG.debug(
"No compatible OSMorphing tools class found for export provider "
"'%s'",
type(origin_provider).__name__)
except exception.OSMorphingToolsNotFound:
LOG.warn("No tools found for export provider of type: %s",
type(origin_provider))
import_os_morphing_tools_cls = get_osmorphing_tools_class_for_provider(
destination_provider, detected_os_info, os_type, osmorphing_info)
if not import_os_morphing_tools_cls:
LOG.error(
"No compatible OSMorphing tools found from import provider '%s' "
"for the given detected OS info %s", type(destination_provider),
detected_os_info)
raise exception.OSMorphingToolsNotFound(os_type=os_type)
import_os_morphing_tools = import_os_morphing_tools_cls(
conn, os_root_dir, os_root_dev, hypervisor_type, event_manager,
detected_os_info)
import_os_morphing_tools.set_environment(environment)
if user_script:
event_manager.progress_update('Running OS morphing user script')
import_os_morphing_tools.run_user_script(user_script)
else:
event_manager.progress_update('No OS morphing user script specified')
event_manager.progress_update('OS being migrated: %s' %
detected_os_info['friendly_release_name'])
(packages_add, _) = import_os_morphing_tools.get_packages()
if export_os_morphing_tools:
(_, packages_remove) = export_os_morphing_tools.get_packages()
# Don't remove packages that need to be installed
packages_remove = list(set(packages_remove) - set(packages_add))
LOG.info("Pre packages uninstall")
export_os_morphing_tools.pre_packages_uninstall(packages_remove)
if packages_remove:
event_manager.progress_update("Removing packages: %s" %
str(packages_remove))
export_os_morphing_tools.uninstall_packages(packages_remove)
LOG.info("Post packages uninstall")
export_os_morphing_tools.post_packages_uninstall(packages_remove)
LOG.info("Pre packages install")
import_os_morphing_tools.pre_packages_install(packages_add)
nics_info = osmorphing_info.get('nics_info')
set_dhcp = osmorphing_info.get('nics_set_dhcp', True)
import_os_morphing_tools.set_net_config(nics_info, dhcp=set_dhcp)
LOG.info("Pre packages")
if packages_add:
event_manager.progress_update("Adding packages: %s" %
str(packages_add))
try:
import_os_morphing_tools.install_packages(packages_add)
except Exception as err:
raise exception.CoriolisException(
"Failed to install packages: %s. Please review logs"
" for more details." % ", ".join(packages_add)) from err
LOG.info("Post packages install")
import_os_morphing_tools.post_packages_install(packages_add)
event_manager.progress_update("Dismounting OS partitions")
os_mount_tools.dismount_os(os_root_dir)
def get_os_morphing_tools(self, conn, osmorphing_info):
""" Returns a tuple containing the instantiated OSMorphing tools class
to use as well as the OS info returned by the tools' `check_os` method.
"""
raise exception.OSMorphingToolsNotFound()
