Add Cloud SQL Auth Proxy IAM authentication#66510
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shahar1 merged 4 commits intoMay 12, 2026
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Pull request overview
This PR adds support for Cloud SQL Auth Proxy IAM DB authentication in the Google Cloud SQL integration by introducing a new sql_proxy_enable_iam_login option that maps to the proxy’s -enable_iam_login flag, allowing connections with an empty password when using the proxy.
Changes:
- Add
sql_proxy_enable_iam_loginplumbing toCloudSqlProxyRunnerandCloudSQLDatabaseHook, including validation and connection-URI/parameters handling for empty passwords. - Add unit tests covering Postgres/MySQL proxy IAM behavior and flag propagation to the proxy runner.
- Add a new system test example DAG and update connection documentation to describe the two IAM authentication paths.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
providers/google/src/airflow/providers/google/cloud/hooks/cloud_sql.py |
Adds the new sql_proxy_enable_iam_login parameter, validation, and proxy flag injection. |
providers/google/tests/unit/google/cloud/hooks/test_cloud_sql.py |
Adds unit tests for proxy IAM behavior, empty-password URI generation, and proxy runner flag behavior. |
providers/google/tests/system/google/cloud/cloud_sql/example_cloud_sql_query_proxy_iam.py |
Adds a system test example DAG demonstrating proxy IAM authentication flow. |
providers/google/docs/connections/gcp_sql.rst |
Documents direct IAM token auth vs proxy IAM auth and updates password requirements accordingly. |
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closes: #35347
How
Add the
sql_proxy_enable_iam_loginparameter to support-enable_iam_logininCloudSqlProxyRunner.What
Reproducer DAG:
Connection:
{ "conn_type": "gcpcloudsql", "login": "<your-sa-name>@<your-project>.iam.gserviceaccount.com", "password": "", "host": "127.0.0.1", "port": 5432, "schema": "test_db", "extra": { "database_type": "postgres", "project_id": "<your-project>", "location": "us-central1", "instance": "<your-instance-name>", "use_proxy": "True", "sql_proxy_use_tcp": "True", "sql_proxy_enable_iam_login": "True" } }Before fix
After fix
System test
Cloud SQL instance lifecycle (create → delete) executed as expected.
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