d8c602cdf0
We don't want to have all errors from all threads logged on ERROR level. E.g. in case of network failure and 10 parallel VM tasks there will be 10 stacktraces in the logs. Parent thread will receive the first exception and in most cases it is enough to treat operation over all threads as errored. Change-Id: Idc93c33f41d502e5aa0149b93ce816379c1043b1 Closes-Bug: #1421032
294 lines
8.7 KiB
Python
294 lines
8.7 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import eventlet
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from eventlet.green import threading
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from eventlet.green import time
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from eventlet import greenpool
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from eventlet import semaphore
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from oslo_config import cfg
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from oslo_context import context
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from oslo_log import log as logging
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from sahara import exceptions as ex
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from sahara.i18n import _
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from sahara.i18n import _LW
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class Context(context.RequestContext):
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def __init__(self,
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user_id=None,
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tenant_id=None,
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auth_token=None,
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service_catalog=None,
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username=None,
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tenant_name=None,
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roles=None,
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is_admin=None,
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remote_semaphore=None,
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auth_uri=None,
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resource_uuid=None,
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current_instance_info=None,
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overwrite=True,
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**kwargs):
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if kwargs:
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LOG.warn(_LW('Arguments dropped when creating context: %s'),
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kwargs)
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super(Context, self).__init__(auth_token=auth_token,
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user=user_id,
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tenant=tenant_id,
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is_admin=is_admin,
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resource_uuid=resource_uuid)
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self.service_catalog = service_catalog
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self.username = username
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self.tenant_name = tenant_name
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self.remote_semaphore = remote_semaphore or semaphore.Semaphore(
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CONF.cluster_remote_threshold)
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self.roles = roles
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if auth_uri:
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self.auth_uri = auth_uri
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else:
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self.auth_uri = _get_auth_uri()
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if overwrite or not hasattr(context._request_store, 'context'):
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self.update_store()
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if current_instance_info is not None:
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self.current_instance_info = current_instance_info
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else:
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self.current_instance_info = InstanceInfo()
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def clone(self):
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return Context(
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self.user_id,
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self.tenant_id,
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self.auth_token,
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self.service_catalog,
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self.username,
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self.tenant_name,
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self.roles,
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self.is_admin,
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self.remote_semaphore,
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self.auth_uri,
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self.resource_uuid,
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self.current_instance_info,
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overwrite=False)
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def to_dict(self):
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return {
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'user_id': self.user_id,
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'tenant_id': self.tenant_id,
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'auth_token': self.auth_token,
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'service_catalog': self.service_catalog,
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'username': self.username,
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'tenant_name': self.tenant_name,
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'is_admin': self.is_admin,
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'roles': self.roles,
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'auth_uri': self.auth_uri,
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'resource_uuid': self.resource_uuid,
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}
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def is_auth_capable(self):
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return (self.service_catalog and self.auth_token and self.tenant and
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self.user_id)
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# NOTE(adrienverge): The Context class uses the 'user' and 'tenant'
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# properties internally (inherited from oslo.context), but Sahara code
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# often uses 'user_id' and 'tenant_id'.
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@property
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def user_id(self):
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return self.user
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@user_id.setter
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def user_id(self, value):
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self.user = value
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@property
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def tenant_id(self):
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return self.tenant
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@tenant_id.setter
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def tenant_id(self, value):
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self.tenant = value
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def get_admin_context():
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return Context(is_admin=True)
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_CTX_STORE = threading.local()
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_CTX_KEY = 'current_ctx'
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def has_ctx():
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return hasattr(_CTX_STORE, _CTX_KEY)
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def ctx():
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if not has_ctx():
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raise ex.IncorrectStateError(_("Context isn't available here"))
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return getattr(_CTX_STORE, _CTX_KEY)
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def current():
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return ctx()
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def set_ctx(new_ctx):
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if not new_ctx and has_ctx():
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delattr(_CTX_STORE, _CTX_KEY)
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if hasattr(context._request_store, 'context'):
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delattr(context._request_store, 'context')
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if new_ctx:
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setattr(_CTX_STORE, _CTX_KEY, new_ctx)
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setattr(context._request_store, 'context', new_ctx)
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def _get_auth_uri():
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if CONF.keystone_authtoken.auth_uri is not None:
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auth_uri = CONF.keystone_authtoken.auth_uri
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else:
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if CONF.keystone_authtoken.identity_uri is not None:
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identity_uri = CONF.keystone_authtoken.identity_uri
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else:
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host = CONF.keystone_authtoken.auth_host
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port = CONF.keystone_authtoken.auth_port
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protocol = CONF.keystone_authtoken.auth_protocol
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identity_uri = '%s://%s:%s' % (protocol, host, port)
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if CONF.use_identity_api_v3 is False:
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auth_version = 'v2.0'
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else:
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auth_version = 'v3'
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auth_uri = '%s/%s' % (identity_uri, auth_version)
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return auth_uri
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def _wrapper(ctx, thread_description, thread_group, func, *args, **kwargs):
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try:
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set_ctx(ctx)
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func(*args, **kwargs)
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except BaseException as e:
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LOG.debug(
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"Thread '%(thread)s' failed with exception: '%(exception)s'",
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{'thread': thread_description, 'exception': e})
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if thread_group and not thread_group.exc:
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thread_group.exc = e
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thread_group.failed_thread = thread_description
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finally:
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if thread_group:
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thread_group._on_thread_exit()
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set_ctx(None)
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def spawn(thread_description, func, *args, **kwargs):
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eventlet.spawn(_wrapper, current().clone(), thread_description,
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None, func, *args, **kwargs)
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class ThreadGroup(object):
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"""ThreadGroup object.
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It is advised to use TreadGroup as a context manager instead
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of instantiating and calling _wait() manually. The __exit__()
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guaranties to exit only after all child threads are done, even if
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spawning code have thrown an exception
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"""
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def __init__(self, thread_pool_size=1000):
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self.tg = greenpool.GreenPool(size=thread_pool_size)
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self.exc = None
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self.failed_thread = None
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self.threads = 0
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self.cv = threading.Condition()
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def spawn(self, thread_description, func, *args, **kwargs):
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self.tg.spawn(_wrapper, current().clone(), thread_description,
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self, func, *args, **kwargs)
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with self.cv:
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self.threads += 1
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def _on_thread_exit(self):
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with self.cv:
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self.threads -= 1
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if self.threads == 0:
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self.cv.notifyAll()
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# NOTE(dmitryme): A little rationale on why we reimplemented wait():
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# * Eventlet's GreenPool.wait() can hung
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# * Oslo's ThreadGroup.wait() can exit before all threads are done
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#
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def _wait(self):
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"""Using of _wait() method.
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It is preferred to use the class as a context manager and do not
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use _wait() directly, see class docstring for an explanation.
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"""
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with self.cv:
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while self.threads > 0:
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self.cv.wait()
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if self.exc:
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raise ex.ThreadException(self.failed_thread, self.exc)
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def __enter__(self):
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return self
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def __exit__(self, *ex):
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if not any(ex):
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self._wait()
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else:
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# If spawning code thrown an exception, it had higher priority
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# for us than the one thrown inside child thread (if any)
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try:
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self._wait()
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except Exception:
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# that will make __exit__ throw original exception
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pass
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def sleep(seconds=0):
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time.sleep(seconds)
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class InstanceInfo(object):
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def __init__(self, cluster_id=None, instance_id=None, instance_name=None,
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node_group_id=None):
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self.cluster_id = cluster_id
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self.instance_id = instance_id
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self.instance_name = instance_name
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self.node_group_id = node_group_id
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class InstanceInfoManager(object):
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def __init__(self, instance_info):
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self.prev_instance_info = current().current_instance_info
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current().current_instance_info = instance_info
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def __enter__(self):
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pass
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def __exit__(self, *args):
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current().current_instance_info = self.prev_instance_info
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