本文為英文版的機器翻譯版本,如內容有任何歧義或不一致之處,概以英文版為準。
步驟 8 (選擇性):清理資源
重要
支援結束通知:現有客戶將能夠使用 Amazon,QLDB直到 2025 年 7 月 31 日終止支援為止。有關更多詳細信息,請參閱將 Amazon QLDB 分類帳遷移到 Amazon Aurora 郵政. SQL
您可以繼續使用分vehicle-registration
類帳。但是,如果不再需要它,則應將其刪除。
若要刪除分類帳
-
使用以下程序(
delete_ledger.py
)刪除vehicle-registration
分類帳及其所有內容。# Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: MIT-0 # # Permission is hereby granted, free of charge, to any person obtaining a copy of this # software and associated documentation files (the "Software"), to deal in the Software # without restriction, including without limitation the rights to use, copy, modify, # merge, publish, distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, # INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A # PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # This code expects that you have AWS credentials setup per: # https://boto3.amazonaws.com/v1/documentation/api/latest/guide/quickstart.html from logging import basicConfig, getLogger, INFO from time import sleep from boto3 import client from pyqldbsamples.constants import Constants from pyqldbsamples.describe_ledger import describe_ledger logger = getLogger(__name__) basicConfig(level=INFO) qldb_client = client('qldb') LEDGER_DELETION_POLL_PERIOD_SEC = 20 def delete_ledger(ledger_name): """ Send a request to QLDB to delete the specified ledger. :type ledger_name: str :param ledger_name: Name for the ledger to be deleted. :rtype: dict :return: Result from the request. """ logger.info('Attempting to delete the ledger with name: {}...'.format(ledger_name)) result = qldb_client.delete_ledger(Name=ledger_name) logger.info('Success.') return result def wait_for_deleted(ledger_name): """ Wait for the ledger to be deleted. :type ledger_name: str :param ledger_name: The ledger to check on. """ logger.info('Waiting for the ledger to be deleted...') while True: try: describe_ledger(ledger_name) logger.info('The ledger is still being deleted. Please wait...') sleep(LEDGER_DELETION_POLL_PERIOD_SEC) except qldb_client.exceptions.ResourceNotFoundException: logger.info('Success. The ledger is deleted.') break def set_deletion_protection(ledger_name, deletion_protection): """ Update an existing ledger's deletion protection. :type ledger_name: str :param ledger_name: Name of the ledger to update. :type deletion_protection: bool :param deletion_protection: Enable or disable the deletion protection. :rtype: dict :return: Result from the request. """ logger.info("Let's set deletion protection to {} for the ledger with name {}.".format(deletion_protection, ledger_name)) result = qldb_client.update_ledger(Name=ledger_name, DeletionProtection=deletion_protection) logger.info('Success. Ledger updated: {}'.format(result)) def main(ledger_name=Constants.LEDGER_NAME): """ Delete a ledger. """ try: set_deletion_protection(ledger_name, False) delete_ledger(ledger_name) wait_for_deleted(ledger_name) except Exception as e: logger.exception('Unable to delete the ledger.') raise e if __name__ == '__main__': main()
注意
如果已啟用分類帳的刪除保護,您必須先停用它,然後才能使用刪除分類帳QLDBAPI。
該
delete_ledger.py
文件還具有對下面的程序(describe_ledger.py
)的依賴。# Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: MIT-0 # # Permission is hereby granted, free of charge, to any person obtaining a copy of this # software and associated documentation files (the "Software"), to deal in the Software # without restriction, including without limitation the rights to use, copy, modify, # merge, publish, distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, # INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A # PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # This code expects that you have AWS credentials setup per: # https://boto3.amazonaws.com/v1/documentation/api/latest/guide/quickstart.html from logging import basicConfig, getLogger, INFO from boto3 import client from pyqldbsamples.constants import Constants logger = getLogger(__name__) basicConfig(level=INFO) qldb_client = client('qldb') def describe_ledger(ledger_name): """ Describe a ledger. :type ledger_name: str :param ledger_name: Name of the ledger to describe. """ logger.info('describe ledger with name: {}.'.format(ledger_name)) result = qldb_client.describe_ledger(Name=ledger_name) result.pop('ResponseMetadata') logger.info('Success. Ledger description: {}.'.format(result)) return result def main(ledger_name=Constants.LEDGER_NAME): """ Describe a QLDB ledger. """ try: describe_ledger(ledger_name) except Exception as e: logger.exception('Unable to describe a ledger.') raise e if __name__ == '__main__': main()
-
若要執行程式,請輸入下列命令。
python delete_ledger.py