446 lines
19 KiB
Python
446 lines
19 KiB
Python
# Copyright 2021 BMW Group
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# Copyright 2021 Acme Gating, LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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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 zuul.model
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from tests.base import iterate_timeout, ZuulTestCase, simple_layout
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from zuul.zk.locks import SessionAwareWriteLock, TENANT_LOCK_ROOT
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class TestScaleOutScheduler(ZuulTestCase):
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tenant_config_file = "config/single-tenant/main.yaml"
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# Those tests are testing specific interactions between multiple
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# schedulers. They create additional schedulers as necessary and
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# start or stop them individually to test specific interactions.
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# Using the scheduler_count in addition to create even more
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# schedulers doesn't make sense for those tests.
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scheduler_count = 1
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def test_multi_scheduler(self):
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# A smoke test that we can enqueue a change with one scheduler
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# and have another one finish the run.
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self.executor_server.hold_jobs_in_build = True
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A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
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A.addApproval('Code-Review', 2)
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self.fake_gerrit.addEvent(A.addApproval('Approved', 1))
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self.waitUntilSettled()
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app = self.createScheduler()
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app.start()
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self.assertEqual(len(self.scheds), 2)
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# Hold the lock on the first scheduler so that only the second
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# will act.
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with self.scheds.first.sched.run_handler_lock:
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self.executor_server.hold_jobs_in_build = False
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self.executor_server.release()
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self.waitUntilSettled(matcher=[app])
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self.assertHistory([
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dict(name='project-merge', result='SUCCESS', changes='1,1'),
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dict(name='project-test1', result='SUCCESS', changes='1,1'),
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dict(name='project-test2', result='SUCCESS', changes='1,1'),
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], ordered=False)
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def test_config_priming(self):
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# Wait until scheduler is primed
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self.waitUntilSettled()
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first_app = self.scheds.first
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initial_max_hold_exp = first_app.sched.globals.max_hold_expiration
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layout_state = first_app.sched.tenant_layout_state.get("tenant-one")
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self.assertIsNotNone(layout_state)
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# Second scheduler instance
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second_app = self.createScheduler()
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# Change a system attribute in order to check that the system config
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# from Zookeeper was used.
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second_app.sched.globals.max_hold_expiration += 1234
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second_app.config.set("scheduler", "max_hold_expiration", str(
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second_app.sched.globals.max_hold_expiration))
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second_app.start()
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self.waitUntilSettled()
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self.assertEqual(first_app.sched.local_layout_state.get("tenant-one"),
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second_app.sched.local_layout_state.get("tenant-one"))
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# Make sure only the first schedulers issued cat jobs
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self.assertIsNotNone(
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first_app.sched.merger.merger_api.history.get("cat"))
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self.assertIsNone(
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second_app.sched.merger.merger_api.history.get("cat"))
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for _ in iterate_timeout(
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10, "Wait for all schedulers to have the same system config"):
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if (first_app.sched.unparsed_abide.ltime
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== second_app.sched.unparsed_abide.ltime):
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break
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# TODO (swestphahl): change this to assertEqual() when we remove
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# the smart reconfiguration during config priming.
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# Currently the smart reconfiguration during priming of the second
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# scheduler will update the system config in Zookeeper and the first
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# scheduler updates it's config in return.
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self.assertNotEqual(second_app.sched.globals.max_hold_expiration,
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initial_max_hold_exp)
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def test_reconfigure(self):
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# Create a second scheduler instance
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app = self.createScheduler()
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app.start()
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self.assertEqual(len(self.scheds), 2)
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for _ in iterate_timeout(10, "Wait until priming is complete"):
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old = self.scheds.first.sched.tenant_layout_state.get("tenant-one")
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if old is not None:
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break
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for _ in iterate_timeout(
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10, "Wait for all schedulers to have the same layout state"):
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layout_states = [a.sched.local_layout_state.get("tenant-one")
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for a in self.scheds.instances]
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if all(l == old for l in layout_states):
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break
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self.scheds.first.sched.reconfigure(self.scheds.first.config)
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self.waitUntilSettled()
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new = self.scheds.first.sched.tenant_layout_state["tenant-one"]
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self.assertNotEqual(old, new)
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for _ in iterate_timeout(10, "Wait for all schedulers to update"):
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layout_states = [a.sched.local_layout_state.get("tenant-one")
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for a in self.scheds.instances]
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if all(l == new for l in layout_states):
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break
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layout_uuids = [a.sched.abide.tenants["tenant-one"].layout.uuid
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for a in self.scheds.instances]
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self.assertTrue(all(l == new.uuid for l in layout_uuids))
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self.waitUntilSettled()
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def test_change_cache(self):
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# Test re-using a change from the change cache.
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A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
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B = self.fake_gerrit.addFakeChange('org/project', 'master', 'B')
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B.setDependsOn(A, 1)
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self.fake_gerrit.addEvent(B.getPatchsetCreatedEvent(1))
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self.waitUntilSettled()
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# This has populated the change cache with our change.
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app = self.createScheduler()
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app.start()
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self.assertEqual(len(self.scheds), 2)
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# Hold the lock on the first scheduler so that only the second
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# will act.
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with self.scheds.first.sched.run_handler_lock:
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# Enqueue the change again. The second scheduler will
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# load the change object from the cache.
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self.fake_gerrit.addEvent(B.getPatchsetCreatedEvent(1))
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self.waitUntilSettled(matcher=[app])
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# Each job should appear twice and contain both changes.
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self.assertHistory([
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dict(name='project-merge', result='SUCCESS', changes='1,1 2,1'),
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dict(name='project-test1', result='SUCCESS', changes='1,1 2,1'),
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dict(name='project-test2', result='SUCCESS', changes='1,1 2,1'),
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dict(name='project-merge', result='SUCCESS', changes='1,1 2,1'),
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dict(name='project-test1', result='SUCCESS', changes='1,1 2,1'),
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dict(name='project-test2', result='SUCCESS', changes='1,1 2,1'),
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], ordered=False)
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def test_pipeline_summary(self):
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# Test that we can deal with a truncated pipeline summary
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self.executor_server.hold_jobs_in_build = True
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tenant = self.scheds.first.sched.abide.tenants.get('tenant-one')
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pipeline = tenant.layout.pipelines['check']
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context = self.createZKContext()
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def new_summary():
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summary = zuul.model.PipelineSummary()
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summary._set(pipeline=pipeline)
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summary.refresh(context)
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return summary
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A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
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self.fake_gerrit.addEvent(A.getPatchsetCreatedEvent(1))
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self.waitUntilSettled()
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# Check we have a good summary
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summary1 = new_summary()
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self.assertNotEqual(summary1.status, {})
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self.assertTrue(context.client.exists(summary1.getPath()))
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# Make a syntax error in the status summary json
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summary = new_summary()
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summary._save(context, b'{"foo')
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# With the corrupt data, we should get an empty status but the
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# path should still exist.
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summary2 = new_summary()
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self.assertEqual(summary2.status, {})
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self.assertTrue(context.client.exists(summary2.getPath()))
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# Our earlier summary object should use its cached data
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summary1.refresh(context)
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self.assertNotEqual(summary1.status, {})
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self.executor_server.hold_jobs_in_build = False
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self.executor_server.release()
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self.waitUntilSettled()
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# The scheduler should have written a new summary that our
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# second object can read now.
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summary2.refresh(context)
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self.assertNotEqual(summary2.status, {})
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@simple_layout('layouts/semaphore.yaml')
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def test_semaphore(self):
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self.executor_server.hold_jobs_in_build = True
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A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
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self.fake_gerrit.addEvent(A.getPatchsetCreatedEvent(1))
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self.waitUntilSettled()
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self.assertEqual(len(self.builds), 1)
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self.assertEqual(self.builds[0].name, 'test1')
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self.assertHistory([])
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tenant = self.scheds.first.sched.abide.tenants['tenant-one']
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semaphore = tenant.semaphore_handler.getSemaphores()[0]
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holders = tenant.semaphore_handler.semaphoreHolders(semaphore)
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self.assertEqual(len(holders), 1)
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# Start a second scheduler so that it runs through the initial
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# cleanup processes.
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app = self.createScheduler()
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# Hold the lock on the second scheduler so that if any events
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# happen, they are processed by the first scheduler (this lets
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# them be as out of sync as possible).
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with app.sched.run_handler_lock:
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app.start()
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self.assertEqual(len(self.scheds), 2)
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self.waitUntilSettled(matcher=[self.scheds.first])
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# Wait until initial cleanup is run
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app.sched.start_cleanup_thread.join()
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# We should not have released the semaphore
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holders = tenant.semaphore_handler.semaphoreHolders(semaphore)
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self.assertEqual(len(holders), 1)
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self.executor_server.release()
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self.waitUntilSettled()
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self.assertEqual(len(self.builds), 1)
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self.assertEqual(self.builds[0].name, 'test2')
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self.assertHistory([
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dict(name='test1', result='SUCCESS', changes='1,1'),
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], ordered=False)
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holders = tenant.semaphore_handler.semaphoreHolders(semaphore)
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self.assertEqual(len(holders), 1)
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self.executor_server.release()
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self.waitUntilSettled()
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self.assertEqual(len(self.builds), 0)
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self.assertHistory([
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dict(name='test1', result='SUCCESS', changes='1,1'),
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dict(name='test2', result='SUCCESS', changes='1,1'),
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], ordered=False)
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holders = tenant.semaphore_handler.semaphoreHolders(semaphore)
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self.assertEqual(len(holders), 0)
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class TestSOSCircularDependencies(ZuulTestCase):
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# Those tests are testing specific interactions between multiple
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# schedulers. They create additional schedulers as necessary and
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# start or stop them individually to test specific interactions.
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# Using the scheduler_count in addition to create even more
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# schedulers doesn't make sense for those tests.
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scheduler_count = 1
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@simple_layout('layouts/sos-circular.yaml')
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def test_sos_circular_deps(self):
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# This test sets the window to 1 so that we can test a code
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# path where we write the queue items to ZK as little as
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# possible on the first scheduler while doing most of the work
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# on the second.
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self.executor_server.hold_jobs_in_build = True
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Z = self.fake_gerrit.addFakeChange('org/project', "master", "Z")
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A = self.fake_gerrit.addFakeChange('org/project', "master", "A")
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B = self.fake_gerrit.addFakeChange('org/project', "master", "B")
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# Z, A <-> B (via commit-depends)
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A.data["commitMessage"] = "{}\n\nDepends-On: {}\n".format(
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A.subject, B.data["url"]
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)
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B.data["commitMessage"] = "{}\n\nDepends-On: {}\n".format(
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B.subject, A.data["url"]
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)
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Z.addApproval("Code-Review", 2)
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self.fake_gerrit.addEvent(Z.addApproval("Approved", 1))
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self.waitUntilSettled()
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A.addApproval("Code-Review", 2)
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B.addApproval("Code-Review", 2)
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A.addApproval("Approved", 1)
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self.fake_gerrit.addEvent(B.addApproval("Approved", 1))
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self.waitUntilSettled()
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# Start a second scheduler
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app = self.createScheduler()
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app.start()
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self.assertEqual(len(self.scheds), 2)
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self.waitUntilSettled()
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# Hold the lock on the first scheduler so that only the second
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# will act.
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with self.scheds.first.sched.run_handler_lock:
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# Release the first item so the second moves into the
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# active window.
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self.assertEqual(len(self.builds), 2)
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builds = self.builds[:]
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builds[0].release()
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builds[1].release()
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self.waitUntilSettled(matcher=[app])
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self.assertEqual(len(self.builds), 4)
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builds = self.builds[:]
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self.executor_server.failJob('job1', A)
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builds[0].release()
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app.sched.wake_event.set()
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self.waitUntilSettled(matcher=[app])
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self.assertEqual(A.reported, 2)
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self.assertEqual(B.reported, 2)
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class TestScaleOutSchedulerMultiTenant(ZuulTestCase):
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# Those tests are testing specific interactions between multiple
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# schedulers. They create additional schedulers as necessary and
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# start or stop them individually to test specific interactions.
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# Using the scheduler_count in addition to create even more
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# schedulers doesn't make sense for those tests.
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scheduler_count = 1
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tenant_config_file = "config/two-tenant/main.yaml"
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def test_background_layout_update(self):
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# This test performs a reconfiguration on one scheduler and
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# verifies that a second scheduler begins processing changes
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# for each tenant as it is updated.
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first = self.scheds.first
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# Create a second scheduler instance
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second = self.createScheduler()
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second.start()
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self.assertEqual(len(self.scheds), 2)
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tenant_one_lock = SessionAwareWriteLock(
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self.zk_client.client,
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f"{TENANT_LOCK_ROOT}/tenant-one")
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A = self.fake_gerrit.addFakeChange('org/project1', 'master', 'A')
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B = self.fake_gerrit.addFakeChange('org/project2', 'master', 'B')
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for _ in iterate_timeout(10, "until priming is complete"):
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state_one = first.sched.local_layout_state.get("tenant-one")
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state_two = first.sched.local_layout_state.get("tenant-two")
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if all([state_one, state_two]):
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break
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for _ in iterate_timeout(
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10, "all schedulers to have the same layout state"):
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if (second.sched.local_layout_state.get(
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"tenant-one") == state_one and
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second.sched.local_layout_state.get(
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"tenant-two") == state_two):
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break
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self.log.debug("Freeze scheduler-1")
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with second.sched.layout_update_lock:
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state_one = first.sched.local_layout_state.get("tenant-one")
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state_two = first.sched.local_layout_state.get("tenant-two")
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self.log.debug("Reconfigure scheduler-0")
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first.sched.reconfigure(first.config)
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for _ in iterate_timeout(
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10, "tenants to be updated on scheduler-0"):
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if ((first.sched.local_layout_state["tenant-one"] !=
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state_one) and
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(first.sched.local_layout_state["tenant-two"] !=
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state_two)):
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break
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self.waitUntilSettled(matcher=[first])
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self.log.debug("Grab tenant-one write lock")
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tenant_one_lock.acquire(blocking=True)
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self.log.debug("Thaw scheduler-1")
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self.log.debug("Freeze scheduler-0")
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with first.sched.run_handler_lock:
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self.log.debug("Open change in tenant-one")
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self.fake_gerrit.addEvent(A.getPatchsetCreatedEvent(1))
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for _ in iterate_timeout(10, "trigger event appears"):
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if second.sched.trigger_events['tenant-one'].hasEvents():
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break
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for _ in iterate_timeout(
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10, "tenant-two to be updated on scheduler-1"):
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if (first.sched.local_layout_state["tenant-two"] ==
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second.sched.local_layout_state.get("tenant-two")):
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break
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# Tenant two should be up to date, but tenant one should
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# still be out of date on scheduler two.
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self.assertEqual(first.sched.local_layout_state["tenant-two"],
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second.sched.local_layout_state["tenant-two"])
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self.assertNotEqual(first.sched.local_layout_state["tenant-one"],
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second.sched.local_layout_state["tenant-one"])
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self.log.debug("Verify tenant-one change is unprocessed")
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# If we have updated tenant-two's configuration without
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# processing the tenant-one change, then we know we've
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# completed at least one run loop.
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self.assertHistory([])
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self.log.debug("Open change in tenant-two")
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self.fake_gerrit.addEvent(B.getPatchsetCreatedEvent(1))
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self.log.debug("Wait for scheduler-1 to process tenant-two change")
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for _ in iterate_timeout(10, "tenant-two build finish"):
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if len(self.history):
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break
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self.assertHistory([
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dict(name='test', result='SUCCESS', changes='2,1'),
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], ordered=False)
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# Tenant two should be up to date, but tenant one should
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# still be out of date on scheduler two.
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self.assertEqual(first.sched.local_layout_state["tenant-two"],
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second.sched.local_layout_state["tenant-two"])
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self.assertNotEqual(first.sched.local_layout_state["tenant-one"],
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second.sched.local_layout_state["tenant-one"])
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self.log.debug("Release tenant-one write lock")
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tenant_one_lock.release()
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self.log.debug("Wait for both changes to be processed")
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self.waitUntilSettled(matcher=[second])
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self.assertHistory([
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dict(name='test', result='SUCCESS', changes='2,1'),
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dict(name='test', result='SUCCESS', changes='1,1'),
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], ordered=False)
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# Both tenants should be up to date
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self.assertEqual(first.sched.local_layout_state["tenant-two"],
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second.sched.local_layout_state["tenant-two"])
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self.assertEqual(first.sched.local_layout_state["tenant-one"],
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second.sched.local_layout_state["tenant-one"])
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self.waitUntilSettled()
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