Add a migration script for encrypted trigger kwargs (apache#38358)

airflow/migrations/versions/0140_2_9_0_update_trigger_kwargs_type.py

@@ -0,0 +1,50 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""update trigger kwargs type
+
+Revision ID: 1949afb29106
+Revises: ee1467d4aa35
+Create Date: 2024-03-17 22:09:09.406395
+
+"""
+import sqlalchemy as sa
+
+from airflow.models.trigger import Trigger
+from alembic import op
+
+from airflow.utils.sqlalchemy import ExtendedJSON
+
+# revision identifiers, used by Alembic.
+revision = "1949afb29106"
+down_revision = "ee1467d4aa35"
+branch_labels = None
+depends_on = None
+airflow_version = "2.9.0"
+
+
+def upgrade():
+    """Update trigger kwargs type to string"""
+    with op.batch_alter_table("trigger") as batch_op:
+        batch_op.alter_column("kwargs", type_=sa.Text(), )
+
+
+def downgrade():
+    """Unapply update trigger kwargs type to string"""
+    with op.batch_alter_table("trigger") as batch_op:
+        batch_op.alter_column("kwargs", type_=ExtendedJSON(), postgresql_using="kwargs::json")

airflow/utils/db.py

@@ -90,7 +90,7 @@
     "2.7.0": "405de8318b3a",
     "2.8.0": "10b52ebd31f7",
     "2.8.1": "88344c1d9134",
-    "2.9.0": "1fd565369930",
+    "2.9.0": "1949afb29106",
 }
 
 
@@ -972,6 +972,33 @@ def synchronize_log_template(*, session: Session = NEW_SESSION) -> None:
         session.add(LogTemplate(filename=filename, elasticsearch_id=elasticsearch_id))
 
 
+def encrypt_trigger_kwargs(*, session: Session) -> None:
+    """Encrypt trigger kwargs."""
+    from airflow.models.trigger import Trigger
+    from airflow.serialization.serialized_objects import BaseSerialization
+
+    for trigger in session.query(Trigger):
+        # convert serialized dict to string and encrypt it
+        trigger.kwargs = BaseSerialization.deserialize(json.loads(trigger.encrypted_kwargs))
+    session.commit()
+
+
+def decrypt_trigger_kwargs(*, session: Session) -> None:
+    """Decrypt trigger kwargs."""
+    from airflow.models.trigger import Trigger
+    from airflow.serialization.serialized_objects import BaseSerialization
+
+    if not inspect(session.bind).has_table(Trigger.__tablename__):
+        # table does not exist, nothing to do
+        # this can happen when we downgrade to an old version before the Trigger table was added
+        return
+
+    for trigger in session.query(Trigger):
+        # decrypt the string and convert it to serialized dict
+        trigger.encrypted_kwargs = json.dumps(BaseSerialization.serialize(trigger.kwargs))
+    session.commit()
+
+
 def check_conn_id_duplicates(session: Session) -> Iterable[str]:
     """
     Check unique conn_id in connection table.
@@ -1639,6 +1666,12 @@ def upgradedb(
         _reserialize_dags(session=session)
     add_default_pool_if_not_exists(session=session)
     synchronize_log_template(session=session)
+    if _revision_greater(
+        config,
+        _REVISION_HEADS_MAP["2.9.0"],
+        _get_current_revision(session=session),
+    ):
+        encrypt_trigger_kwargs(session=session)
 
 
 @provide_session
@@ -1711,6 +1744,12 @@ def downgrade(*, to_revision, from_revision=None, show_sql_only=False, session:
         else:
             log.info("Applying downgrade migrations.")
             command.downgrade(config, revision=to_revision, sql=show_sql_only)
+    if _revision_greater(
+        config,
+        _REVISION_HEADS_MAP["2.9.0"],
+        to_revision,
+    ):
+        decrypt_trigger_kwargs(session=session)
 
 
 def drop_airflow_models(connection):