Your advanced code editor is loading.

Please wait a moment.

#editor-loading { display: none; }

Licensed under the Apache License, Version 2.0 (the “License”);

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an “AS IS” BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

from . import leaderelection from .leaderelectionrecord import LeaderElectionRecord from kubernetes.client.rest import ApiException from . import electionconfig import unittest import threading import json import time import pytest

thread_lock = threading.RLock()

class LeaderElectionTest(unittest.TestCase): def test_simple_leader_election(self): election_history = [] leadership_history = []

    def on_create():
          election_history.append("create record")
          leadership_history.append("get leadership")
          
          def on_update():
          election_history.append("update record")
          def on_change():
          election_history.append("change record")
          mock_lock = MockResourceLock("mock", "mock_namespace", "mock", thread_lock, on_create, on_update, on_change, None)
          def on_started_leading():
          leadership_history.append("start leading")
          def on_stopped_leading():
          leadership_history.append("stop leading")
          Create config 4.5 4 3
          config = electionconfig.Config(lock=mock_lock, lease_duration=2.5,
          renew_deadline=2, retry_period=1.5, onstarted_leading=on_started_leading,
          onstopped_leading=on_stopped_leading)
          Enter leader election
          leaderelection.LeaderElection(config).run()
          self.assert_history(election_history, ["create record", "update record", "update record", "update record"])
          self.assert_history(leadership_history, ["get leadership", "start leading", "stop leading"])
          def test_leader_election(self):
          election_history = []
          leadership_history = []
          def on_create_A():
          election_history.append("A creates record")
          leadership_history.append("A gets leadership")
          def on_update_A():
          election_history.append("A updates record")
          def on_change_A():
          election_history.append("A gets leadership")
          mock_lock_A = MockResourceLock("mock", "mock_namespace", "MockA", thread_lock, on_create_A, on_update_A, on_change_A, None)
          mock_lock_A.renew_count_max = 3
          def on_started_leading_A():
          leadership_history.append("A starts leading")
          def on_stopped_leading_A():
          leadership_history.append("A stops leading")
          config_A = electionconfig.Config(lock=mock_lock_A, lease_duration=2.5,
          renew_deadline=2, retry_period=1.5, onstarted_leading=on_started_leading_A,
          onstopped_leading=on_stopped_leading_A)
          def on_create_B():
          election_history.append("B creates record")
          leadership_history.append("B gets leadership")
          def on_update_B():
          election_history.append("B updates record")
          def on_change_B():
          leadership_history.append("B gets leadership")
          mock_lock_B = MockResourceLock("mock", "mock_namespace", "MockB", thread_lock, on_create_B, on_update_B, on_change_B, None)
          mock_lock_B.renew_count_max = 4
          def on_started_leading_B():
          leadership_history.append("B starts leading")
          def on_stopped_leading_B():
          leadership_history.append("B stops leading")
          config_B = electionconfig.Config(lock=mock_lock_B, lease_duration=2.5,
          renew_deadline=2, retry_period=1.5, onstarted_leading=on_started_leading_B,
          onstopped_leading=on_stopped_leading_B)
          mock_lock_B.leader_record = mock_lock_A.leader_record
          threading.daemon = True
          Enter leader election for A
          threading.Thread(target=leaderelection.LeaderElection(config_A).run()).start()
          Enter leader election for B
          threading.Thread(target=leaderelection.LeaderElection(config_B).run()).start()
          time.sleep(5)
          self.assert_history(election_history,
          ["A creates record",
          "A updates record",
          "A updates record",
          "B updates record",
          "B updates record",
          "B updates record",
          "B updates record"])
          self.assert_history(leadership_history,
          ["A gets leadership",
          "A starts leading",
          "A stops leading",
          "B gets leadership",
          "B starts leading",
          "B stops leading"])
          """Expected behavior: to check if the leader stops leading if it fails to update the lock within the renew_deadline
          and stops leading after finally timing out. The difference between each try comes out to be approximately the sleep
          time.
          Example:
          create record:  0s
          on try update:  1.5s
          on update:  zzz s
          on try update:  3s
          on update: zzz s
          on try update:  4.5s
          on try update:  6s
          Timeout - Leader Exits"""
          def test_Leader_election_with_renew_deadline(self):
          election_history = []
          leadership_history = []
          def on_create():
          election_history.append("create record")
          leadership_history.append("get leadership")
          def on_update():
          election_history.append("update record")
          def on_change():
          election_history.append("change record")
          def on_try_update():
          election_history.append("try update record")
          mock_lock = MockResourceLock("mock", "mock_namespace", "mock", thread_lock, on_create, on_update, on_change, on_try_update)
          mock_lock.renew_count_max = 3
          def on_started_leading():
          leadership_history.append("start leading")
          def on_stopped_leading():
          leadership_history.append("stop leading")
          Create config
          config = electionconfig.Config(lock=mock_lock, lease_duration=2.5,
          renew_deadline=2, retry_period=1.5, onstarted_leading=on_started_leading,
          onstopped_leading=on_stopped_leading)
          Enter leader election
          leaderelection.LeaderElection(config).run()
          self.assert_history(election_history,
          ["create record",
          "try update record",
          "update record",
          "try update record",
          "update record",
          "try update record",
          "try update record"])
          self.assert_history(leadership_history, ["get leadership", "start leading", "stop leading"])
          def assert_history(self, history, expected):
          self.assertIsNotNone(expected)
          self.assertIsNotNone(history)
          self.assertEqual(len(expected), len(history))
          for idx in range(len(history)):
          self.assertEqual(history[idx], expected[idx],
          msg="Not equal at index {}, expected {}, got {}".format(idx, expected[idx],
          history[idx]))

class MockResourceLock: def init(self, name, namespace, identity, shared_lock, on_create=None, on_update=None, on_change=None, on_try_update=None): # self.leader_record is shared between two MockResourceLock objects self.leader_record = [] self.renew_count = 0 self.renew_count_max = 4 self.name = name self.namespace = namespace self.identity = str(identity) self.lock = shared_lock

    self.on_create = on_create
          self.on_update = on_update
          self.on_change = on_change
          self.on_try_update = on_try_update
          
          def get(self, name, namespace):
          self.lock.acquire()
          try:
          if self.leader_record:
          return True, self.leader_record[0]
          ApiException.body = json.dumps({'code': 404})
          return False, ApiException
          finally:
          self.lock.release()
          def create(self, name, namespace, election_record):
          self.lock.acquire()
          try:
          if len(self.leader_record) == 1:
          return False
          self.leader_record.append(election_record)
          self.on_create()
          self.renew_count += 1
          return True
          finally:
          self.lock.release()
          def update(self, name, namespace, updated_record):
          self.lock.acquire()
          try:
          if self.on_try_update:
          self.on_try_update()
          if self.renew_count >= self.renew_count_max:
          return False
          old_record = self.leader_record[0]
          self.leader_record[0] = updated_record
          self.on_update()
          if old_record.holder_identity != updated_record.holder_identity:
          self.on_change()
          self.renew_count += 1
          return True
          finally:
          self.lock.release()

if name == ‘main’: unittest.main()

Your advanced code editor is loading.

Please wait a moment.

Explanation

Graph

Symbols

We couldn't identify any entrypoints. If you believe this to be incorrect then please contact support.