4d29af161b
changed file naming style consistent with the existing go client code Update example.py Changed file and folder names Rename LeaderElection.py to leaderelection.py Rename threadingWithException.py to threadingwithexception.py Rename ConfigMapLock.py to configmaplock.py LeaderElection to leaderelection Added boiler plate headers, updated variable and function names consistent with the guidelines, removed the ctypes dependency by using traces to kill threads, changed logic for leader now it gives up and doesn't re-join as a follower if it fails to update lease added correct boiler plate year Rename threadingWithTrace.py to threadingwithtrace.py Update leaderelection.py Update example.py Changes based on review - logging, OnStoppedLeading is not killed abruptly, OnStartedLeading is not run in a separate thread, adding README Update example.py updated comments set threads as daemon Update README.md Code made consistent with other clients. Update example.py Update leaderelection.py Error & exception handling for the annotation, reduced indentation Adding serializing functions for serializing & de-serializing locks, leader_election_record as a class Adding a test Adding boilerplate header Rename leaderelectiontest.py to leaderelection_test.py Updated boiler plates handling imports for pytest handling 'HTTP not found' compatibility with python 2 & 3, & handling relative imports Update leaderelection.py to check tests for tox assertEquals -> assertEqual Update leaderelection_test.py making Threading compatible for Python 2 changing datetime.timestamp for backward compatibility with Python 2.7 Adding comments for test_Leader_election_with_renew_deadline & making candidates run in parallel for test_leader_election remove redundant daemon = True reassignment common thread lock for MockResourceLock
55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
# Copyright 2021 The Kubernetes Authors.
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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 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 uuid
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from kubernetes import client, config
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from leaderelection import leaderelection
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from leaderelection.resourcelock.configmaplock import ConfigMapLock
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from leaderelection import electionconfig
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# Authenticate using config file
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config.load_kube_config(config_file=r"")
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# Parameters required from the user
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# A unique identifier for this candidate
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candidate_id = uuid.uuid4()
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# Name of the lock object to be created
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lock_name = "examplepython"
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# Kubernetes namespace
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lock_namespace = "default"
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# The function that a user wants to run once a candidate is elected as a leader
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def example_func():
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print("I am leader")
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# A user can choose not to provide any callbacks for what to do when a candidate fails to lead - onStoppedLeading()
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# In that case, a default callback function will be used
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# Create config
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config = electionconfig.Config(ConfigMapLock(lock_name, lock_namespace, candidate_id), lease_duration=17,
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renew_deadline=15, retry_period=5, onstarted_leading=example_func,
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onstopped_leading=None)
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# Enter leader election
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leaderelection.LeaderElection(config).run()
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# User can choose to do another round of election or simply exit
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print("Exited leader election")
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