323 lines
9.7 KiB
Python
323 lines
9.7 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 traceback
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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.service import sessions
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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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resource_uuid=None,
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current_instance_info=None,
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request_id=None,
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auth_plugin=None,
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overwrite=True,
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**kwargs):
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if kwargs:
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LOG.warning('Arguments dropped when creating context: '
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'{args}'.format(args=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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request_id=request_id,
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roles=roles)
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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.auth_plugin = auth_plugin
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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.resource_uuid,
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self.current_instance_info,
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self.request_id,
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self.auth_plugin,
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overwrite=False)
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def to_dict(self):
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d = super(Context, self).to_dict()
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d.update({
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'user_id': self.user_id,
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'tenant_id': self.tenant_id,
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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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'user_name': self.username,
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'project_name': self.tenant_name})
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return d
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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, overwrite=False)
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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 _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} failed with exception: {exception}".format(
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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.exc_stacktrace = traceback.format_exc()
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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.exc_stacktrace = 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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self.exc_stacktrace)
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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, step_type=None, step_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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self.step_type = step_type
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self.step_id = step_id
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def set_step_type(step_type):
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current().current_instance_info.step_type = step_type
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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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if not instance_info.step_type:
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instance_info.step_type = self.prev_instance_info.step_type
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if not instance_info.step_id:
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instance_info.step_id = self.prev_instance_info.step_id
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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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def set_current_cluster_id(cluster_id):
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current().resource_uuid = 'none, cluster: %s' % cluster_id
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def set_current_job_execution_id(je_id):
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current().resource_uuid = 'none, job_execution: %s' % je_id
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class SetCurrentInstanceId(object):
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def __init__(self, instance_id):
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ctx = current()
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self.prev_uuid = ctx.resource_uuid
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if ctx.resource_uuid:
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ctx.resource_uuid = ctx.resource_uuid.replace('none', instance_id)
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context.get_current().resource_uuid = ctx.resource_uuid
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def __enter__(self):
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pass
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def __exit__(self, *ex):
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current().resource_uuid = self.prev_uuid
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context.get_current().resource_uuid = self.prev_uuid
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def set_current_instance_id(instance_id):
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return SetCurrentInstanceId(instance_id)
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def get_auth_token():
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cur = current()
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if cur.auth_plugin:
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try:
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cur.auth_token = sessions.cache().token_for_auth(cur.auth_plugin)
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except Exception as e:
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LOG.warning("Cannot update token, reason: %s", e)
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return cur.auth_token
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