feat(airflow): make RUN_IN_THREAD configurable (datahub-project#9226)

docs/lineage/airflow.md

@@ -193,6 +193,7 @@ In order to use this example, you must first configure the Datahub hook. Like in
 If you're not seeing lineage in DataHub, check the following:
 
 - Validate that the plugin is loaded in Airflow. Go to Admin -> Plugins and check that the DataHub plugin is listed.
+- With the v2 plugin, it should also print a log line like `INFO  [datahub_airflow_plugin.datahub_listener] DataHub plugin v2 using DataHubRestEmitter: configured to talk to <datahub_url>` during Airflow startup, and the `airflow plugins` command should list `datahub_plugin` with a listener enabled.
 - If using the v2 plugin's automatic lineage, ensure that the `enable_extractors` config is set to true and that automatic lineage is supported for your operator.
 - If using manual lineage annotation, ensure that you're using the `datahub_airflow_plugin.entities.Dataset` or `datahub_airflow_plugin.entities.Urn` classes for your inlets and outlets.
 

metadata-ingestion-modules/airflow-plugin/src/datahub_airflow_plugin/datahub_listener.py

@@ -1,6 +1,7 @@
 import copy
 import functools
 import logging
+import os
 import threading
 from typing import TYPE_CHECKING, Callable, Dict, List, Optional, TypeVar, cast
 
@@ -55,7 +56,10 @@ def hookimpl(f: _F) -> _F:  # type: ignore[misc] # noqa: F811
 
 _airflow_listener_initialized = False
 _airflow_listener: Optional["DataHubListener"] = None
-_RUN_IN_THREAD = True
+_RUN_IN_THREAD = os.getenv("DATAHUB_AIRFLOW_PLUGIN_RUN_IN_THREAD", "true").lower() in (
+    "true",
+    "1",
+)
 _RUN_IN_THREAD_TIMEOUT = 30
 
 
@@ -133,7 +137,7 @@ def __init__(self, config: DatahubLineageConfig):
 
         self._emitter = config.make_emitter_hook().make_emitter()
         self._graph: Optional[DataHubGraph] = None
-        logger.info(f"DataHub plugin using {repr(self._emitter)}")
+        logger.info(f"DataHub plugin v2 using {repr(self._emitter)}")
 
         # See discussion here https://github.com/OpenLineage/OpenLineage/pull/508 for
         # why we need to keep track of tasks ourselves.

metadata-ingestion/src/datahub/cli/docker_cli.py

@@ -766,7 +766,7 @@ def quickstart(  # noqa: C901
                 logger.debug("docker compose up timed out, sending SIGTERM")
                 up_process.terminate()
                 try:
-                    up_process.wait(timeout=3)
+                    up_process.wait(timeout=8)
                 except subprocess.TimeoutExpired:
                     logger.debug("docker compose up still running, sending SIGKILL")
                     up_process.kill()