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# Copyright 2021 The Kubernetes Authors.
#
# 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.
import sys
import logging
logging.basicConfig(level=logging.INFO)
class Config:
# Validate config, exit if an error is detected
def __init__(self, lock, lease_duration, renew_deadline, retry_period, onstarted_leading, onstopped_leading):
self.jitter_factor = 1.2
if lock is None:
sys.exit("lock cannot be None")
self.lock = lock
if lease_duration <= renew_deadline:
sys.exit("lease_duration must be greater than renew_deadline")
if renew_deadline <= self.jitter_factor * retry_period:
sys.exit("renewDeadline must be greater than retry_period*jitter_factor")
if lease_duration < 1:
sys.exit("lease_duration must be greater than one")
if renew_deadline < 1:
sys.exit("renew_deadline must be greater than one")
if retry_period < 1:
sys.exit("retry_period must be greater than one")
self.lease_duration = lease_duration
self.renew_deadline = renew_deadline
self.retry_period = retry_period
if onstarted_leading is None:
sys.exit("callback onstarted_leading cannot be None")
self.onstarted_leading = onstarted_leading
if onstopped_leading is None:
self.onstopped_leading = self.on_stoppedleading_callback
else:
self.onstopped_leading = onstopped_leading
# Default callback for when the current candidate if a leader, stops leading
def on_stoppedleading_callback(self):
logging.info("stopped leading".format(self.lock.identity))
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