Add backward compatibility with old versions of Apache Beam (#27263)

airflow/providers/apache/beam/hooks/beam.py

@@ -18,6 +18,7 @@
 """This module contains a Apache Beam Hook."""
 from __future__ import annotations
 
+import contextlib
 import json
 import os
 import select
@@ -28,6 +29,8 @@
 from tempfile import TemporaryDirectory
 from typing import Callable
 
+from packaging.version import Version
+
 from airflow.exceptions import AirflowConfigException, AirflowException
 from airflow.hooks.base import BaseHook
 from airflow.providers.google.go_module_utils import init_module, install_dependencies
@@ -226,37 +229,47 @@ def start_python_pipeline(
         if "labels" in variables:
             variables["labels"] = [f"{key}={value}" for key, value in variables["labels"].items()]
 
-        if py_requirements is not None:
-            if not py_requirements and not py_system_site_packages:
-                warning_invalid_environment = textwrap.dedent(
-                    """\
-                    Invalid method invocation. You have disabled inclusion of system packages and empty list
-                    required for installation, so it is not possible to create a valid virtual environment.
-                    In the virtual environment, apache-beam package must be installed for your job to be \
-                    executed. To fix this problem:
-                    * install apache-beam on the system, then set parameter py_system_site_packages to True,
-                    * add apache-beam to the list of required packages in parameter py_requirements.
-                    """
-                )
-                raise AirflowException(warning_invalid_environment)
-
-            with TemporaryDirectory(prefix="apache-beam-venv") as tmp_dir:
+        with contextlib.ExitStack() as exit_stack:
+            if py_requirements is not None:
+                if not py_requirements and not py_system_site_packages:
+                    warning_invalid_environment = textwrap.dedent(
+                        """\
+                        Invalid method invocation. You have disabled inclusion of system packages and empty
+                        list required for installation, so it is not possible to create a valid virtual
+                        environment. In the virtual environment, apache-beam package must be installed for
+                        your job to be executed.
+
+                        To fix this problem:
+                        * install apache-beam on the system, then set parameter py_system_site_packages
+                          to True,
+                        * add apache-beam to the list of required packages in parameter py_requirements.
+                        """
+                    )
+                    raise AirflowException(warning_invalid_environment)
+                tmp_dir = exit_stack.enter_context(TemporaryDirectory(prefix="apache-beam-venv"))
                 py_interpreter = prepare_virtualenv(
                     venv_directory=tmp_dir,
                     python_bin=py_interpreter,
                     system_site_packages=py_system_site_packages,
                     requirements=py_requirements,
                 )
-                command_prefix = [py_interpreter] + py_options + [py_file]
 
-                self._start_pipeline(
-                    variables=variables,
-                    command_prefix=command_prefix,
-                    process_line_callback=process_line_callback,
-                )
-        else:
             command_prefix = [py_interpreter] + py_options + [py_file]
 
+            beam_version = (
+                subprocess.check_output(
+                    [py_interpreter, "-c", "import apache_beam; print(apache_beam.__version__)"]
+                )
+                .decode()
+                .strip()
+            )
+            self.log.info("Beam version: %s", beam_version)
+            impersonate_service_account = variables.get("impersonate_service_account")
+            if impersonate_service_account:
+                if Version(beam_version) < Version("2.39.0") or True:
+                    raise AirflowException(
+                        "The impersonateServiceAccount option requires Apache Beam 2.39.0 or newer."
+                    )
             self._start_pipeline(
                 variables=variables,
                 command_prefix=command_prefix,

airflow/providers/apache/beam/provider.yaml

@@ -36,7 +36,7 @@ versions:
 
 dependencies:
   - apache-airflow>=2.3.0
-  - apache-beam>=2.39.0
+  - apache-beam>=2.33.0
 
 integrations:
   - integration-name: Apache Beam

airflow/providers/google/cloud/operators/dataflow.py

@@ -80,6 +80,11 @@ class DataflowConfiguration:
         If set as a sequence, the identities from the list must grant
         Service Account Token Creator IAM role to the directly preceding identity, with first
         account from the list granting this role to the originating account (templated).
+
+        .. warning::
+
+            This option requires Apache Beam 2.39.0 or newer.
+
     :param drain_pipeline: Optional, set to True if want to stop streaming job by draining it
         instead of canceling during killing task instance. See:
         https://cloud.google.com/dataflow/docs/guides/stopping-a-pipeline

generated/provider_dependencies.json

@@ -45,7 +45,7 @@
   "apache.beam": {
     "deps": [
       "apache-airflow>=2.3.0",
-      "apache-beam>=2.39.0"
+      "apache-beam>=2.33.0"
     ],
     "cross-providers-deps": [
       "google"

tests/providers/apache/beam/hooks/test_beam.py

@@ -18,11 +18,13 @@
 
 import copy
 import os
+import re
 import subprocess
 import unittest
 from unittest import mock
 from unittest.mock import MagicMock
 
+import pytest
 from parameterized import parameterized
 
 from airflow.exceptions import AirflowException
@@ -58,7 +60,8 @@
 
 class TestBeamHook(unittest.TestCase):
     @mock.patch(BEAM_STRING.format("BeamCommandRunner"))
-    def test_start_python_pipeline(self, mock_runner):
+    @mock.patch("airflow.providers.apache.beam.hooks.beam.subprocess.check_output", return_value=b"2.39.0")
+    def test_start_python_pipeline(self, mock_check_output, mock_runner):
         hook = BeamHook(runner=DEFAULT_RUNNER)
         wait_for_done = mock_runner.return_value.wait_for_done
         process_line_callback = MagicMock()
@@ -83,6 +86,26 @@ def test_start_python_pipeline(self, mock_runner):
         )
         wait_for_done.assert_called_once_with()
 
+    @mock.patch("airflow.providers.apache.beam.hooks.beam.subprocess.check_output", return_value=b"2.35.0")
+    def test_start_python_pipeline_unsupported_option(self, mock_check_output):
+        hook = BeamHook(runner=DEFAULT_RUNNER)
+
+        with pytest.raises(
+            AirflowException,
+            match=re.escape("The impersonateServiceAccount option requires Apache Beam 2.39.0 or newer."),
+        ):
+            hook.start_python_pipeline(
+                variables={
+                    "impersonate_service_account": "test@impersonation.com",
+                },
+                py_file="/tmp/file.py",
+                py_options=["-m"],
+                py_interpreter="python3",
+                py_requirements=None,
+                py_system_site_packages=False,
+                process_line_callback=MagicMock(),
+            )
+
     @parameterized.expand(
         [
             ("default_to_python3", "python3"),
@@ -92,7 +115,10 @@ def test_start_python_pipeline(self, mock_runner):
         ]
     )
     @mock.patch(BEAM_STRING.format("BeamCommandRunner"))
-    def test_start_python_pipeline_with_custom_interpreter(self, _, py_interpreter, mock_runner):
+    @mock.patch("airflow.providers.apache.beam.hooks.beam.subprocess.check_output", return_value=b"2.39.0")
+    def test_start_python_pipeline_with_custom_interpreter(
+        self, _, py_interpreter, mock_check_output, mock_runner
+    ):
         hook = BeamHook(runner=DEFAULT_RUNNER)
         wait_for_done = mock_runner.return_value.wait_for_done
         process_line_callback = MagicMock()
@@ -127,8 +153,14 @@ def test_start_python_pipeline_with_custom_interpreter(self, _, py_interpreter,
     )
     @mock.patch(BEAM_STRING.format("prepare_virtualenv"))
     @mock.patch(BEAM_STRING.format("BeamCommandRunner"))
+    @mock.patch("airflow.providers.apache.beam.hooks.beam.subprocess.check_output", return_value=b"2.39.0")
     def test_start_python_pipeline_with_non_empty_py_requirements_and_without_system_packages(
-        self, current_py_requirements, current_py_system_site_packages, mock_runner, mock_virtualenv
+        self,
+        current_py_requirements,
+        current_py_system_site_packages,
+        mock_check_output,
+        mock_runner,
+        mock_virtualenv,
     ):
         hook = BeamHook(runner=DEFAULT_RUNNER)
         wait_for_done = mock_runner.return_value.wait_for_done
@@ -164,7 +196,10 @@ def test_start_python_pipeline_with_non_empty_py_requirements_and_without_system
         )
 
     @mock.patch(BEAM_STRING.format("BeamCommandRunner"))
-    def test_start_python_pipeline_with_empty_py_requirements_and_without_system_packages(self, mock_runner):
+    @mock.patch("airflow.providers.apache.beam.hooks.beam.subprocess.check_output", return_value=b"2.39.0")
+    def test_start_python_pipeline_with_empty_py_requirements_and_without_system_packages(
+        self, mock_check_output, mock_runner
+    ):
         hook = BeamHook(runner=DEFAULT_RUNNER)
         wait_for_done = mock_runner.return_value.wait_for_done
         process_line_callback = MagicMock()