makiwino opened a new pull request, #27705:
URL: https://github.com/apache/airflow/pull/27705
This feature enables to use _impersonation_chain_ in kwargs in env variables
setting Google secret manager backend.
Example of the use of new feature:
```
AIRFLOW__SECRETS__BACKEND=airflow.providers.google.cloud.secrets.secret_manager.CloudSecretManagerBackend
AIRFLOW__SECRETS__BACKEND_KWARGS='{"impersonation_chain":"service_account@project_id.iam.gserviceaccount.com","project_id":"project_id","connections_prefix":
"airflow-connections", "variables_prefix": "airflow-variables"}'
```
Why this change is needed?
Our Airflow deployment service account and team developers accounts share
one main team serviceaccount via serviceAccountTokenCreator permission. This
team serviceaccount has accesses to particular services like BQ, GCS, Google
secrets. While BQ and GCS operators has impersonalisation_chain arg, google
secret manager backend doesnt support this feautre. Using this new feature all
approaches are aligned and it is possible to follow this good pattern.
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