Taragolis commented on issue #27078:
URL: https://github.com/apache/airflow/issues/27078#issuecomment-1344633330
Oh... right. Forget that STS didn't use regional endpoint by default in
`boto3`. And it should be enabled by set environment variable
`AWS_STS_REGIONAL_ENDPOINTS` to `regional` all other clients use regional
endpoints by default (except some S3 regions)
```python
import os
import boto3
os.environ["AWS_DEFAULT_REGION"] = "eu-west-1"
session = boto3.session.Session()
emr_client = session.client("emr")
print(f"Client info: {emr_client.meta.config.user_agent}")
print(f"STS Endpoint URL: {emr_client.meta.endpoint_url}")
sts_client = session.client("sts")
print(f"STS Endpoint URL: {sts_client.meta.endpoint_url}")
os.environ["AWS_STS_REGIONAL_ENDPOINTS"] = "regional"
sts_client_regional = session.client("sts")
print(f"STS Endpoint URL: {sts_client_regional.meta.endpoint_url}")
```
I have an idea to enable set endpoint url by dictionary (on service level)
in connection rather than define it for all services.
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