我正在尝试设置aws rds copy-db-snapshot使用 KMS 加密密钥的最小权限：
$ aws rds copy-db-snapshot --source-db-snapshot-identifier rds-backup-share-
mysql --target-db-snapshot-identifier rds-backup-share-mysql-reencrypted --kms-key-id <kms-arn>
（其中的所有内容都<>被我剥离并包含有效值。）
不幸的是，我收到了这个错误：
An error occurred (KMSKeyNotAccessibleFault) when calling the CopyDBSnapshot operation: The target snapshot KMS key [<kms-arn>] does not exist, is not enabled or you do not have permissions to access it.
目前我允许这些操作：
"Action": [
"kms:ReEncrypt*",
"kms:ListKeys",
"kms:ListAliases",
"kms:GenerateDataKey*",
"kms:Encrypt",
"kms:DescribeKey",
"kms:Decrypt"
],
如果我用 替换它就可以了kms:*{code}，所以它一定是权限问题。
我试图用 CloudTrail 找出正确的权限，但它只包含同样无用的错误消息。
所以我的实际问题：
- CopyDBSnapshot 的最低 KMS 权限是多少？
- 有没有一种通用的方法来确定所需的权限？通过谷歌搜索所需的权限来浪费我的时间总是很痛苦。
编辑：这是启用的日志输出的底部--debug：
2017-08-22 17:15:37,521 - MainThread - botocore.endpoint - DEBUG - Sending http request: <PreparedRequest [POST]>
2017-08-22 17:15:37,522 - MainThread - botocore.vendored.requests.packages.urllib3.connectionpool - INFO - Starting new HTTPS connection (1): rds.eu-west-1.amazonaws.com
2017-08-22 17:15:37,927 - MainThread - botocore.vendored.requests.packages.urllib3.connectionpool - DEBUG - "POST / HTTP/1.1" 400 437
2017-08-22 17:15:37,934 - MainThread - botocore.parsers - DEBUG - Response headers: {'x-amzn-requestid': 'c097fe4e-874c-11e7-a56a-9d1acedaf516', 'content-type': 'text/xml', 'content-length': '437', 'date': 'Tue, 22 Aug 2017 15:15:37 GMT', 'connection': 'close'}
2017-08-22 17:15:37,936 - MainThread - botocore.parsers - DEBUG - Response body:
b'<ErrorResponse xmlns="http://rds.amazonaws.com/doc/2014-10-31/">\n <Error>\n <Type>Sender</Type>\n <Code>KMSKeyNotAccessibleFault</Code>\n <Message>The target snapshot KMS key [<kms-arn>] does not exist, is not enabled or you do not have permissions to access it. </Message>\n </Error>\n <RequestId>c097fe4e-874c-11e7-a56a-9d1acedaf516</RequestId>\n</ErrorResponse>\n'
2017-08-22 17:15:37,938 - MainThread - botocore.hooks - DEBUG - Event needs-retry.rds.CopyDBSnapshot: calling handler <botocore.retryhandler.RetryHandler object at 0x7f9c7ce84860>
2017-08-22 17:15:37,939 - MainThread - botocore.retryhandler - DEBUG - No retry needed.
2017-08-22 17:15:37,952 - MainThread - awscli.clidriver - DEBUG - Exception caught in main()
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/awscli/clidriver.py", line 200, in main
return command_table[parsed_args.command](remaining, parsed_args)
File "/usr/lib/python3.6/site-packages/awscli/clidriver.py", line 338, in __call__
return command_table[parsed_args.operation](remaining, parsed_globals)
File "/usr/lib/python3.6/site-packages/awscli/clidriver.py", line 508, in __call__
call_parameters, parsed_globals)
File "/usr/lib/python3.6/site-packages/awscli/clidriver.py", line 627, in invoke
client, operation_name, parameters, parsed_globals)
File "/usr/lib/python3.6/site-packages/awscli/clidriver.py", line 639, in _make_client_call
**parameters)
File "/usr/lib/python3.6/site-packages/botocore/client.py", line 310, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/usr/lib/python3.6/site-packages/botocore/client.py", line 599, in _make_api_call
raise error_class(parsed_response, operation_name)
botocore.errorfactory.KMSKeyNotAccessibleFault: An error occurred (KMSKeyNotAccessibleFault) when calling the CopyDBSnapshot operation: The target snapshot KMS key [<kms-arn>] does not exist, is not enabled or you do not have permissions to access it.
2017-08-22 17:15:37,955 - MainThread - awscli.clidriver - DEBUG - Exiting with rc 255
An error occurred (KMSKeyNotAccessibleFault) when calling the CopyDBSnapshot operation: The target snapshot KMS key [<kms-arn>] does not exist, is not enabled or you do not have permissions to access it.
FTR：我在 AWS 论坛上发帖：https ://forums.aws.amazon.com/thread.jspa?messageID=801745