Add initial resume logic to engine
Change-Id: I08e08bb3edbc83ecce831c8fe7ad718ad7476634 blueprint: stack-suspend-resume
This commit is contained in:
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aef9899002
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84d71d6342
@ -42,8 +42,9 @@ logger = logging.getLogger(__name__)
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class Stack(object):
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ACTIONS = (CREATE, DELETE, UPDATE, ROLLBACK, SUSPEND
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) = ('CREATE', 'DELETE', 'UPDATE', 'ROLLBACK', 'SUSPEND')
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ACTIONS = (CREATE, DELETE, UPDATE, ROLLBACK, SUSPEND, RESUME
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) = ('CREATE', 'DELETE', 'UPDATE', 'ROLLBACK', 'SUSPEND',
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'RESUME')
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STATUSES = (IN_PROGRESS, FAILED, COMPLETE
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) = ('IN_PROGRESS', 'FAILED', 'COMPLETE')
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@ -464,6 +465,20 @@ class Stack(object):
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reverse=True)
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sus_task(timeout=self.timeout_secs())
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def resume(self):
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'''
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Resume the stack, which invokes handle_resume for all stack resources
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waits for all resources to become RESUME_COMPLETE then declares the
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stack RESUME_COMPLETE.
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Note the default implementation for all resources is to do nothing
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other than move to RESUME_COMPLETE, so the resources must implement
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handle_resume for this to have any effect.
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'''
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sus_task = scheduler.TaskRunner(self.stack_task,
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action=self.RESUME,
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reverse=False)
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sus_task(timeout=self.timeout_secs())
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def output(self, key):
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'''
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Get the value of the specified stack output.
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@ -113,8 +113,9 @@ class Metadata(object):
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class Resource(object):
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ACTIONS = (CREATE, DELETE, UPDATE, ROLLBACK, SUSPEND
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) = ('CREATE', 'DELETE', 'UPDATE', 'ROLLBACK', 'SUSPEND')
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ACTIONS = (CREATE, DELETE, UPDATE, ROLLBACK, SUSPEND, RESUME
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) = ('CREATE', 'DELETE', 'UPDATE', 'ROLLBACK',
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'SUSPEND', 'RESUME')
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STATUSES = (IN_PROGRESS, FAILED, COMPLETE
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) = ('IN_PROGRESS', 'FAILED', 'COMPLETE')
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@ -439,9 +440,7 @@ class Resource(object):
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def suspend(self):
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'''
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Suspend the resource. Subclasses should provide a handle_suspend()
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method to implement suspend, the base-class handle_update does nothing
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Note this uses the same coroutine logic as create() since suspending
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instances is a non-immediate operation and we want to paralellize
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method to implement suspend
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'''
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# Don't try to suspend the resource unless it's in a stable state
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if (self.action == self.DELETE or self.status != self.COMPLETE):
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@ -452,6 +451,20 @@ class Resource(object):
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logger.info('suspending %s' % str(self))
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return self._do_action(self.SUSPEND)
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def resume(self):
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'''
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Resume the resource. Subclasses should provide a handle_resume()
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method to implement resume
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'''
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# Can't resume a resource unless it's SUSPEND_COMPLETE
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if self.state != (self.SUSPEND, self.COMPLETE):
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exc = exception.Error('State %s invalid for resume'
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% str(self.state))
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raise exception.ResourceFailure(exc)
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logger.info('resuming %s' % str(self))
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return self._do_action(self.RESUME)
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def physical_resource_name(self):
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if self.id is None:
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return None
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@ -476,9 +476,7 @@ class EngineService(service.Service):
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@request_context
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def stack_suspend(self, cnxt, stack_identity):
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'''
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Handle request to perform an action on an existing stack
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actions are non-lifecycle operations which manipulate the
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state of the stack but not the definition
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Handle request to perform suspend action on a stack
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'''
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def _stack_suspend(stack):
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logger.debug("suspending stack %s" % stack.name)
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@ -489,6 +487,20 @@ class EngineService(service.Service):
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stack = parser.Stack.load(cnxt, stack=s)
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self._start_in_thread(stack.id, _stack_suspend, stack)
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@request_context
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def stack_resume(self, cnxt, stack_identity):
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'''
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Handle request to perform a resume action on a stack
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'''
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def _stack_resume(stack):
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logger.debug("resuming stack %s" % stack.name)
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stack.resume()
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s = self._get_stack(cnxt, stack_identity)
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stack = parser.Stack.load(cnxt, stack=s)
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self._start_in_thread(stack.id, _stack_resume, stack)
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@request_context
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def metadata_update(self, cnxt, stack_identity,
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resource_name, metadata):
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@ -217,6 +217,10 @@ class EngineClient(heat.openstack.common.rpc.proxy.RpcProxy):
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return self.call(ctxt, self.make_msg('stack_suspend',
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stack_identity=stack_identity))
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def stack_resume(self, ctxt, stack_identity):
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return self.call(ctxt, self.make_msg('stack_resume',
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stack_identity=stack_identity))
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def metadata_update(self, ctxt, stack_identity, resource_name, metadata):
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"""
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Update the metadata for the given resource.
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@ -38,3 +38,6 @@ class GenericResource(resource.Resource):
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def handle_suspend(self):
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logger.warning('Suspending generic resource (Type "%s")' % self.type())
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def handle_resume(self):
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logger.warning('Resuming generic resource (Type "%s")' % self.type())
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@ -465,10 +465,10 @@ class stackServiceCreateUpdateDeleteTest(HeatTestCase):
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self.m.VerifyAll()
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class stackServiceSuspendTest(HeatTestCase):
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class stackServiceSuspendResumeTest(HeatTestCase):
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def setUp(self):
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super(stackServiceSuspendTest, self).setUp()
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super(stackServiceSuspendResumeTest, self).setUp()
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self.username = 'stack_service_suspend_test_user'
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self.tenant = 'stack_service_suspend_test_tenant'
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setup_dummy_db()
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@ -493,6 +493,23 @@ class stackServiceSuspendTest(HeatTestCase):
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result = self.man.stack_suspend(self.ctx, stack.identifier())
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self.assertEqual(result, None)
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self.m.VerifyAll()
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@stack_context('service_resume_test_stack', False)
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def test_stack_resume(self):
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self.m.StubOutWithMock(parser.Stack, 'load')
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parser.Stack.load(self.ctx,
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stack=mox.IgnoreArg()).AndReturn(self.stack)
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self.m.StubOutWithMock(service.EngineService, '_start_in_thread')
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service.EngineService._start_in_thread(self.stack.id,
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mox.IgnoreArg(),
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self.stack).AndReturn(None)
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self.m.ReplayAll()
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result = self.man.stack_resume(self.ctx, self.stack.identifier())
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self.assertEqual(result, None)
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self.m.VerifyAll()
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def test_stack_suspend_nonexist(self):
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@ -505,6 +522,16 @@ class stackServiceSuspendTest(HeatTestCase):
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self.man.stack_suspend, self.ctx, stack.identifier())
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self.m.VerifyAll()
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def test_stack_resume_nonexist(self):
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stack_name = 'service_resume_nonexist_test_stack'
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stack = get_wordpress_stack(stack_name, self.ctx)
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self.m.ReplayAll()
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self.assertRaises(exception.StackNotFound,
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self.man.stack_resume, self.ctx, stack.identifier())
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self.m.VerifyAll()
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class stackServiceTest(HeatTestCase):
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@ -597,7 +597,7 @@ class StackTest(HeatTestCase):
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(parser.Stack.DELETE, parser.Stack.COMPLETE))
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@stack_delete_after
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def test_suspend(self):
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def test_suspend_resume(self):
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self.m.ReplayAll()
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tmpl = {'Resources': {'AResource': {'Type': 'GenericResourceType'}}}
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self.stack = parser.Stack(self.ctx, 'suspend_test',
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@ -611,6 +611,12 @@ class StackTest(HeatTestCase):
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self.assertEqual(self.stack.state,
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(self.stack.SUSPEND, self.stack.COMPLETE))
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self.stack.resume()
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self.assertEqual(self.stack.state,
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(self.stack.RESUME, self.stack.COMPLETE))
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self.m.VerifyAll()
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@stack_delete_after
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@ -637,6 +643,35 @@ class StackTest(HeatTestCase):
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'Resource suspend failed: Exception: foo')
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self.m.VerifyAll()
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@stack_delete_after
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def test_resume_fail(self):
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tmpl = {'Resources': {'AResource': {'Type': 'GenericResourceType'}}}
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self.m.StubOutWithMock(generic_rsrc.GenericResource, 'handle_resume')
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exc = exception.ResourceFailure(Exception('foo'))
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generic_rsrc.GenericResource.handle_resume().AndRaise(exc)
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self.m.ReplayAll()
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self.stack = parser.Stack(self.ctx, 'resume_test_fail',
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parser.Template(tmpl))
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stack_id = self.stack.store()
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self.stack.create()
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self.assertEqual(self.stack.state,
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(self.stack.CREATE, self.stack.COMPLETE))
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self.stack.suspend()
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self.assertEqual(self.stack.state,
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(self.stack.SUSPEND, self.stack.COMPLETE))
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self.stack.resume()
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self.assertEqual(self.stack.state,
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(self.stack.RESUME, self.stack.FAILED))
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self.assertEqual(self.stack.status_reason,
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'Resource resume failed: Exception: foo')
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self.m.VerifyAll()
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@stack_delete_after
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def test_suspend_timeout(self):
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tmpl = {'Resources': {'AResource': {'Type': 'GenericResourceType'}}}
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@ -660,6 +695,35 @@ class StackTest(HeatTestCase):
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self.assertEqual(self.stack.status_reason, 'Suspend timed out')
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self.m.VerifyAll()
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@stack_delete_after
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def test_resume_timeout(self):
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tmpl = {'Resources': {'AResource': {'Type': 'GenericResourceType'}}}
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self.m.StubOutWithMock(generic_rsrc.GenericResource, 'handle_resume')
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exc = scheduler.Timeout('foo', 0)
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generic_rsrc.GenericResource.handle_resume().AndRaise(exc)
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self.m.ReplayAll()
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self.stack = parser.Stack(self.ctx, 'resume_test_fail_timeout',
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parser.Template(tmpl))
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stack_id = self.stack.store()
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self.stack.create()
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self.assertEqual(self.stack.state,
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(self.stack.CREATE, self.stack.COMPLETE))
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self.stack.suspend()
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self.assertEqual(self.stack.state,
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(self.stack.SUSPEND, self.stack.COMPLETE))
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self.stack.resume()
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self.assertEqual(self.stack.state,
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(self.stack.RESUME, self.stack.FAILED))
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self.assertEqual(self.stack.status_reason, 'Resume timed out')
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self.m.VerifyAll()
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@stack_delete_after
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def test_delete_rollback(self):
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self.stack = parser.Stack(self.ctx, 'delete_rollback_test',
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@ -12,6 +12,7 @@
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# License for the specific language governing permissions and limitations
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# under the License.
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import itertools
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from eventlet.support import greenlets as greenlet
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from heat.common import context
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@ -387,7 +388,7 @@ class ResourceTest(HeatTestCase):
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self.assertEqual((res.UPDATE, res.FAILED), res.state)
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self.m.VerifyAll()
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def test_suspend_ok(self):
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def test_suspend_resume_ok(self):
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# patch in a dummy property schema for GenericResource
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dummy_schema = {'Foo': {'Type': 'String'}}
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generic_rsrc.GenericResource.properties_schema = dummy_schema
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@ -400,6 +401,8 @@ class ResourceTest(HeatTestCase):
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self.assertEqual((res.CREATE, res.COMPLETE), res.state)
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scheduler.TaskRunner(res.suspend)()
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self.assertEqual((res.SUSPEND, res.COMPLETE), res.state)
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scheduler.TaskRunner(res.resume)()
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self.assertEqual((res.RESUME, res.COMPLETE), res.state)
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def test_suspend_fail_inprogress(self):
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# patch in a dummy property schema for GenericResource
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@ -423,6 +426,24 @@ class ResourceTest(HeatTestCase):
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suspend = scheduler.TaskRunner(res.suspend)
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self.assertRaises(exception.ResourceFailure, suspend)
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def test_resume_fail_not_suspend_complete(self):
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# patch in a dummy property schema for GenericResource
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dummy_schema = {'Foo': {'Type': 'String'}}
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generic_rsrc.GenericResource.properties_schema = dummy_schema
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tmpl = {'Type': 'GenericResourceType', 'Properties': {'Foo': 'abc'}}
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res = generic_rsrc.GenericResource('test_resource', tmpl, self.stack)
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scheduler.TaskRunner(res.create)()
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self.assertEqual((res.CREATE, res.COMPLETE), res.state)
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non_suspended_states = [s for s in
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itertools.product(res.ACTIONS, res.STATUSES)
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if s != (res.SUSPEND, res.COMPLETE)]
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for state in non_suspended_states:
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res.state_set(*state)
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resume = scheduler.TaskRunner(res.resume)
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self.assertRaises(exception.ResourceFailure, resume)
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def test_suspend_fail_exit(self):
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# patch in a dummy property schema for GenericResource
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dummy_schema = {'Foo': {'Type': 'String'}}
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@ -442,6 +463,27 @@ class ResourceTest(HeatTestCase):
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self.assertRaises(greenlet.GreenletExit, suspend)
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self.assertEqual((res.SUSPEND, res.FAILED), res.state)
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def test_resume_fail_exit(self):
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# patch in a dummy property schema for GenericResource
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dummy_schema = {'Foo': {'Type': 'String'}}
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generic_rsrc.GenericResource.properties_schema = dummy_schema
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tmpl = {'Type': 'GenericResourceType', 'Properties': {'Foo': 'abc'}}
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res = generic_rsrc.GenericResource('test_resource', tmpl, self.stack)
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scheduler.TaskRunner(res.create)()
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self.assertEqual((res.CREATE, res.COMPLETE), res.state)
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self.m.StubOutWithMock(generic_rsrc.GenericResource, 'handle_resume')
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generic_rsrc.GenericResource.handle_resume().AndRaise(
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greenlet.GreenletExit())
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self.m.ReplayAll()
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res.state_set(res.SUSPEND, res.COMPLETE)
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resume = scheduler.TaskRunner(res.resume)
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self.assertRaises(greenlet.GreenletExit, resume)
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self.assertEqual((res.RESUME, res.FAILED), res.state)
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def test_suspend_fail_exception(self):
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# patch in a dummy property schema for GenericResource
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dummy_schema = {'Foo': {'Type': 'String'}}
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@ -460,6 +502,26 @@ class ResourceTest(HeatTestCase):
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self.assertRaises(exception.ResourceFailure, suspend)
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self.assertEqual((res.SUSPEND, res.FAILED), res.state)
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def test_resume_fail_exception(self):
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# patch in a dummy property schema for GenericResource
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dummy_schema = {'Foo': {'Type': 'String'}}
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generic_rsrc.GenericResource.properties_schema = dummy_schema
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tmpl = {'Type': 'GenericResourceType', 'Properties': {'Foo': 'abc'}}
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res = generic_rsrc.GenericResource('test_resource', tmpl, self.stack)
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scheduler.TaskRunner(res.create)()
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self.assertEqual((res.CREATE, res.COMPLETE), res.state)
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self.m.StubOutWithMock(generic_rsrc.GenericResource, 'handle_resume')
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generic_rsrc.GenericResource.handle_resume().AndRaise(Exception())
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self.m.ReplayAll()
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res.state_set(res.SUSPEND, res.COMPLETE)
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resume = scheduler.TaskRunner(res.resume)
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self.assertRaises(exception.ResourceFailure, resume)
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self.assertEqual((res.RESUME, res.FAILED), res.state)
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class MetadataTest(HeatTestCase):
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def setUp(self):
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@ -145,6 +145,10 @@ class EngineRpcAPITestCase(testtools.TestCase):
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self._test_engine_api('stack_suspend', 'call',
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stack_identity=self.identity)
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def test_stack_resume(self):
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self._test_engine_api('stack_resume', 'call',
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stack_identity=self.identity)
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def test_metadata_update(self):
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self._test_engine_api('metadata_update', 'call',
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stack_identity=self.identity,
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