mik-laj commented on a change in pull request #16771:
URL: https://github.com/apache/airflow/pull/16771#discussion_r663051792
##########
File path: airflow/providers/amazon/aws/hooks/base_aws.py
##########
@@ -97,57 +99,61 @@ def _create_basic_session(self, session_kwargs: Dict[str,
Any]) -> boto3.session
**session_kwargs,
)
- def _impersonate_to_role(
- self, role_arn: str, session: boto3.session.Session, session_kwargs:
Dict[str, Any]
- ) -> boto3.session.Session:
- assume_role_kwargs = self.extra_config.get("assume_role_kwargs", {})
- assume_role_method = self.extra_config.get('assume_role_method')
+ def _create_session_with_assume_role(self, session_kwargs: Dict[str, Any])
-> boto3.session.Session:
+ assume_role_method = self.extra_config.get('assume_role_method',
'assume_role')
self.log.info("assume_role_method=%s", assume_role_method)
- if not assume_role_method or assume_role_method == 'assume_role':
- sts_client = session.client("sts", config=self.config)
- sts_response = self._assume_role(
- sts_client=sts_client, role_arn=role_arn,
assume_role_kwargs=assume_role_kwargs
- )
- elif assume_role_method == 'assume_role_with_saml':
- sts_client = session.client("sts", config=self.config)
- sts_response = self._assume_role_with_saml(
- sts_client=sts_client, role_arn=role_arn,
assume_role_kwargs=assume_role_kwargs
- )
- elif assume_role_method == 'assume_role_with_web_identity':
- botocore_session = self._assume_role_with_web_identity(
- role_arn=role_arn,
- assume_role_kwargs=assume_role_kwargs,
- base_session=session._session,
- )
- return boto3.session.Session(
- region_name=session.region_name,
- botocore_session=botocore_session,
- **session_kwargs,
- )
- else:
+ supported_methods = ['assume_role', 'assume_role_with_saml',
'assume_role_with_web_identity']
+ if assume_role_method not in supported_methods:
raise NotImplementedError(
f'assume_role_method={assume_role_method} in Connection
{self.conn.conn_id} Extra.'
- 'Currently "assume_role" or "assume_role_with_saml" are
supported.'
+ f'Currently {supported_methods} are supported.'
'(Exclude this setting will default to "assume_role").'
)
- # Use credentials retrieved from STS
- credentials = sts_response["Credentials"]
- aws_access_key_id = credentials["AccessKeyId"]
- aws_secret_access_key = credentials["SecretAccessKey"]
- aws_session_token = credentials["SessionToken"]
- self.log.info(
- "Creating session with aws_access_key_id=%s region_name=%s",
- aws_access_key_id,
- session.region_name,
- )
-
- return boto3.session.Session(
- aws_access_key_id=aws_access_key_id,
- aws_secret_access_key=aws_secret_access_key,
- region_name=session.region_name,
- aws_session_token=aws_session_token,
- **session_kwargs,
- )
+ if assume_role_method == 'assume_role_with_web_identity':
+ # Deferred credentials have no initial credentials
+ credential_fetcher = self._get_web_identity_credential_fetcher()
+ credentials = DeferredRefreshableCredentials(
+ method='assume-role-with-web-identity',
+ refresh_using=credential_fetcher.fetch_credentials,
+ time_fetcher=lambda: datetime.datetime.now(tz=tzlocal()),
+ )
+ else:
+ # Refreshable credentials do have initial credentials
+ credentials = RefreshableCredentials.create_from_metadata(
+ metadata=self._refresh_credentials(),
+ refresh_using=self._refresh_credentials,
+ method="sts-assume-role",
+ )
+ session = botocore.session.get_session()
+ session._credentials = credentials # pylint: disable=protected-access
+ region_name = self.basic_session.region_name
+ session.set_config_variable("region", region_name)
+ return boto3.session.Session(botocore_session=session,
**session_kwargs)
+
+ def _refresh_credentials(self) -> boto3.session.Session:
Review comment:
I have a feeling this function returns a dictionary not
`boto3.session.Session`. Am I right?
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