Container Infrastructure Management Service for OpenStack
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# Copyright 2013 - Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Magnum base exception handling.
Includes decorator for re-raising Magnum-type exceptions.
"""
import functools
import json
import sys
import uuid
from keystoneclient import exceptions as keystone_exceptions
from oslo_config import cfg
from oslo_log import log as logging
from oslo_utils import excutils
import pecan
import six
import wsme
from magnum.common import safe_utils
from magnum.i18n import _
from magnum.i18n import _LE
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
try:
CONF.import_opt('fatal_exception_format_errors',
'oslo_versionedobjects.exception')
except cfg.NoSuchOptError as e:
# Note:work around for magnum run against master branch
# in devstack gate job, as magnum not branched yet
# verisonobjects kilo/master different version can
# cause issue here. As it changed import group. So
# add here before branch to prevent gate failure.
# Bug: #1447873
CONF.import_opt('fatal_exception_format_errors',
'oslo_versionedobjects.exception',
group='oslo_versionedobjects')
def wrap_exception(notifier=None, event_type=None):
"""This decorator wraps a method to catch any exceptions.
It logs the exception as well as optionally sending
it to the notification system.
"""
def inner(f):
def wrapped(self, context, *args, **kw):
# Don't store self or context in the payload, it now seems to
# contain confidential information.
try:
return f(self, context, *args, **kw)
except Exception as e:
with excutils.save_and_reraise_exception():
if notifier:
call_dict = safe_utils.getcallargs(f, context,
*args, **kw)
payload = dict(exception=e,
private=dict(args=call_dict)
)
temp_type = event_type
if not temp_type:
# If f has multiple decorators, they must use
# functools.wraps to ensure the name is
# propagated.
temp_type = f.__name__
notifier.error(context, temp_type, payload)
return functools.wraps(f)(wrapped)
return inner
OBFUSCATED_MSG = _('Your request could not be handled '
'because of a problem in the server. '
'Error Correlation id is: %s')
def wrap_controller_exception(func, func_server_error, func_client_error):
"""This decorator wraps controllers methods to handle exceptions:
- if an unhandled Exception or a MagnumException with an error code >=500
is catched, raise a http 5xx ClientSideError and correlates it with a log
message
- if a MagnumException is catched and its error code is <500, raise a http
4xx and logs the excp in debug mode
"""
@functools.wraps(func)
def wrapped(*args, **kw):
try:
return func(*args, **kw)
except Exception as excp:
if isinstance(excp, MagnumException):
http_error_code = excp.code
else:
http_error_code = 500
if http_error_code >= 500:
# log the error message with its associated
# correlation id
log_correlation_id = str(uuid.uuid4())
LOG.error(_LE("%(correlation_id)s:%(excp)s") %
{'correlation_id': log_correlation_id,
'excp': str(excp)})
# raise a client error with an obfuscated message
func_server_error(log_correlation_id, http_error_code)
else:
# raise a client error the original message
LOG.debug(excp)
func_client_error(excp, http_error_code)
return wrapped
def wrap_wsme_controller_exception(func):
"""This decorator wraps wsme controllers to handle exceptions."""
def _func_server_error(log_correlation_id, status_code):
raise wsme.exc.ClientSideError(
six.text_type(OBFUSCATED_MSG % log_correlation_id), status_code)
def _func_client_error(excp, status_code):
raise wsme.exc.ClientSideError(six.text_type(excp), status_code)
return wrap_controller_exception(func,
_func_server_error,
_func_client_error)
def wrap_pecan_controller_exception(func):
"""This decorator wraps pecan controllers to handle exceptions."""
def _func_server_error(log_correlation_id, status_code):
pecan.response.status = status_code
pecan.response.text = six.text_type(OBFUSCATED_MSG %
log_correlation_id)
def _func_client_error(excp, status_code):
pecan.response.status = status_code
pecan.response.text = six.text_type(excp)
pecan.response.content_type = None
return wrap_controller_exception(func,
_func_server_error,
_func_client_error)
def wrap_keystone_exception(func):
"""Wrap keystone exceptions and throw Magnum specific exceptions."""
@functools.wraps(func)
def wrapped(*args, **kw):
try:
return func(*args, **kw)
except keystone_exceptions.AuthorizationFailure:
raise AuthorizationFailure(
client=func.__name__, message="reason: %s" % sys.exc_info()[1])
except keystone_exceptions.ClientException:
raise AuthorizationFailure(
client=func.__name__,
message="unexpected keystone client error occurred: %s"
% sys.exc_info()[1])
return wrapped
class MagnumException(Exception):
"""Base Magnum Exception
To correctly use this class, inherit from it and define
a 'message' property. That message will get printf'd
with the keyword arguments provided to the constructor.
"""
message = _("An unknown exception occurred.")
code = 500
def __init__(self, message=None, **kwargs):
self.kwargs = kwargs
if 'code' not in self.kwargs and hasattr(self, 'code'):
self.kwargs['code'] = self.code
if message:
self.message = message
try:
self.message = self.message % kwargs
except Exception as e:
# kwargs doesn't match a variable in the message
# log the issue and the kwargs
LOG.exception(_LE('Exception in string format operation, '
'kwargs: %s') % kwargs)
try:
if CONF.fatal_exception_format_errors:
raise e
except cfg.NoSuchOptError:
# Note: work around for Bug: #1447873
if CONF.oslo_versionedobjects.fatal_exception_format_errors:
raise e
super(MagnumException, self).__init__(self.message)
def __str__(self):
if six.PY3:
return self.message
return self.message.encode('utf-8')
def __unicode__(self):
return self.message
def format_message(self):
if self.__class__.__name__.endswith('_Remote'):
return self.args[0]
else:
return six.text_type(self)
class ObjectNotFound(MagnumException):
message = _("The %(name)s %(id)s could not be found.")
class ObjectNotUnique(MagnumException):
message = _("The %(name)s already exists.")
class ResourceNotFound(ObjectNotFound):
message = _("The %(name)s resource %(id)s could not be found.")
code = 404
class ResourceExists(ObjectNotUnique):
message = _("The %(name)s resource already exists.")
code = 409
class AuthorizationFailure(MagnumException):
message = _("%(client)s connection failed. %(message)s")
class UnsupportedObjectError(MagnumException):
message = _('Unsupported object type %(objtype)s')
class IncompatibleObjectVersion(MagnumException):
message = _('Version %(objver)s of %(objname)s is not supported')
class OrphanedObjectError(MagnumException):
message = _('Cannot call %(method)s on orphaned %(objtype)s object')
class Invalid(MagnumException):
message = _("Unacceptable parameters.")
code = 400
class InvalidUUID(Invalid):
message = _("Expected a uuid but received %(uuid)s.")
class InvalidName(Invalid):
message = _("Expected a name but received %(uuid)s.")
class InvalidDiscoveryURL(Invalid):
message = _("Received invalid discovery URL '%(discovery_url)s' for "
"discovery endpoint '%(discovery_endpoint)s'.")
class GetDiscoveryUrlFailed(MagnumException):
message = _("Failed to get discovery url from '%(discovery_endpoint)s'.")
class InvalidUuidOrName(Invalid):
message = _("Expected a name or uuid but received %(uuid)s.")
class InvalidIdentity(Invalid):
message = _("Expected an uuid or int but received %(identity)s.")
class HTTPNotFound(ResourceNotFound):
pass
class Conflict(MagnumException):
message = _('Conflict.')
code = 409
class InvalidState(Conflict):
message = _("Invalid resource state.")
# Cannot be templated as the error syntax varies.
# msg needs to be constructed when raised.
class InvalidParameterValue(Invalid):
message = _("%(err)s")
class InstanceNotFound(ResourceNotFound):
message = _("Instance %(instance)s could not be found.")
class PatchError(Invalid):
message = _("Couldn't apply patch '%(patch)s'. Reason: %(reason)s")
class NotAuthorized(MagnumException):
message = _("Not authorized.")
code = 403
class PolicyNotAuthorized(NotAuthorized):
message = _("Policy doesn't allow %(action)s to be performed.")
class NotAcceptable(MagnumException):
# TODO(yuntongjin): We need to set response headers
# in the API for this exception
message = _("Request not acceptable.")
code = 406
class InvalidMAC(Invalid):
message = _("Expected a MAC address but received %(mac)s.")
class ConfigInvalid(MagnumException):
message = _("Invalid configuration file. %(error_msg)s")
class SSHConnectFailed(MagnumException):
message = _("Failed to establish SSH connection to host %(host)s.")
class FileSystemNotSupported(MagnumException):
message = _("Failed to create a file system. "
"File system %(fs)s is not supported.")
class BayModelNotFound(ResourceNotFound):
message = _("Baymodel %(baymodel)s could not be found.")
class BayModelAlreadyExists(Conflict):
message = _("A baymodel with UUID %(uuid)s already exists.")
class BayModelReferenced(Invalid):
message = _("Baymodel %(baymodel)s is referenced by one or multiple bays.")
class BaymodelPublishDenied(NotAuthorized):
message = _("Not authorized to set public flag for baymodel.")
class BayNotFound(ResourceNotFound):
message = _("Bay %(bay)s could not be found.")
class BayAlreadyExists(Conflict):
message = _("A bay with UUID %(uuid)s already exists.")
class ContainerNotFound(ResourceNotFound):
message = _("Container %(container)s could not be found.")
class ContainerAlreadyExists(Conflict):
message = _("A container with UUID %(uuid)s already exists.")
class PodNotFound(ResourceNotFound):
message = _("Pod %(pod)s could not be found.")
class PodAlreadyExists(Conflict):
message = _("A pod with UUID %(uuid)s already exists.")
class PodListNotFound(ResourceNotFound):
message = _("Pod list could not be found for Bay %(bay_uuid)s.")
class PodCreationFailed(Invalid):
message = _("Pod creation failed in Bay %(bay_uuid)s.")
class ReplicationControllerNotFound(ResourceNotFound):
message = _("ReplicationController %(rc)s could not be found.")
class ReplicationControllerAlreadyExists(Conflict):
message = _("A ReplicationController with UUID %(uuid)s already exists.")
class ReplicationControllerListNotFound(ResourceNotFound):
message = _("ReplicationController list could not be found"
" for Bay %(bay_uuid)s.")
class ReplicationControllerCreationFailed(Invalid):
message = _("ReplicationController creation failed"
" for Bay %(bay_uuid)s.")
class ServiceNotFound(ResourceNotFound):
message = _("Service %(service)s could not be found.")
class ServiceAlreadyExists(Conflict):
message = _("A service with UUID %(uuid)s already exists.")
class ServiceListNotFound(ResourceNotFound):
message = _("Service list could not be found for Bay %(bay_uuid)s.")
class ServiceCreationFailed(Invalid):
message = _("Service creation failed for Bay %(bay_uuid)s.")
class ContainerException(Exception):
pass
class NotSupported(MagnumException):
message = _("%(operation)s is not supported.")
code = 400
class BayTypeNotSupported(MagnumException):
message = _("Bay type (%(server_type)s, %(os)s, %(coe)s)"
" not supported.")
class BayTypeNotEnabled(MagnumException):
message = _("Bay type (%(server_type)s, %(os)s, %(coe)s)"
" not enabled.")
class RequiredParameterNotProvided(MagnumException):
message = _("Required parameter %(heat_param)s not provided.")
class Urllib2InvalidScheme(MagnumException):
message = _("The urllib2 URL %(url)s has an invalid scheme.")
class OperationInProgress(Invalid):
message = _("Bay %(bay_name)s already has an operation in progress.")
class ImageNotFound(ResourceNotFound):
"""The code here changed to 400 according to the latest document."""
message = _("Image %(image_id)s could not be found.")
code = 400
class ImageNotAuthorized(MagnumException):
message = _("Not authorized for image %(image_id)s.")
class OSDistroFieldNotFound(ResourceNotFound):
"""The code here changed to 400 according to the latest document."""
message = _("Image %(image_id)s doesn't contain os_distro field.")
code = 400
class KubernetesAPIFailed(MagnumException):
def __init__(self, message=None, err=None, **kwargs):
if err:
if err.body:
message = json.loads(err.body)['message']
else:
message = err.reason
self.__class__.code = err.status
else:
self.__class__.code = kwargs.get('code')
super(KubernetesAPIFailed, self).__init__(message, **kwargs)
class X509KeyPairNotFound(ResourceNotFound):
message = _("A key pair %(keypair)s could not be found.")
class X509KeyPairAlreadyExists(Conflict):
message = _("A key pair with UUID %(uuid)s already exists.")
class CertificateStorageException(MagnumException):
message = _("Could not store certificate: %(msg)s")
class CertificateValidationError(Invalid):
message = _("Extension '%(extension)s' not allowed")
class KeyPairNotFound(ResourceNotFound):
message = _("Unable to find keypair %(keypair)s.")
class MagnumServiceNotFound(ResourceNotFound):
message = _("A magnum service %(magnum_service_id)s could not be found.")
class MagnumServiceAlreadyExists(Conflict):
message = _("A magnum service with ID %(id)s already exists.")
class UnsupportedK8sMemoryFormat(MagnumException):
message = _("Unsupported memory format for k8s bay.")
class FlavorNotFound(ResourceNotFound):
"""The code here changed to 400 according to the latest document."""
message = _("Unable to find flavor %(flavor)s.")
code = 400
class NetworkNotFound(ResourceNotFound):
"""The code here changed to 400 according to the latest document."""
message = _("Unable to find network %(network)s.")
code = 400
class TrustCreateFailed(MagnumException):
message = _("Failed to create trust for trustee %(trustee_user_id)s.")
class TrustDeleteFailed(MagnumException):
message = _("Failed to delete trust %(trust_id)s.")
class TrusteeCreateFailed(MagnumException):
message = _("Failed to create trustee %(username) in domain $(domain_id)")
class TrusteeDeleteFailed(MagnumException):
message = _("Failed to delete trustee %(trustee_id)")