add pipe sleection for logs (#763)

Author: orweis

packages/opal-common/opal_common/config.py

@@ -40,6 +40,11 @@ class OpalCommonConfig(Confi):
     LOG_SERIALIZE = confi.bool(
         "LOG_SERIALIZE", False, description="Serialize log messages"
     )
+    LOG_PIPE_TO_STDERR = confi.bool(
+        "LOG_PIPE_TO_STDERR",
+        True,
+        description="Should we send logs to stderr? otherwise to stdout",
+    )
     LOG_SHOW_CODE_LINE = confi.bool(
         "LOG_SHOW_CODE_LINE", True, description="Show code line in log messages"
     )
@@ -68,6 +73,7 @@ class OpalCommonConfig(Confi):
     LOG_TO_FILE = confi.bool(
         "LOG_TO_FILE", False, description="Should we log to a file"
     )
+
     LOG_FILE_PATH = confi.str(
         "LOG_FILE_PATH",
         f"opal_{PROCESS_NAME}{{time}}.log",

packages/opal-common/opal_common/logger.py

@@ -29,8 +29,9 @@ def configure_logs():
     # Clean slate
     logger.remove()
     # Logger configuration
+    pipe = sys.stderr if opal_common_config.LOG_PIPE_TO_STDERR else sys.stdout
     logger.add(
-        sys.stderr,
+        pipe,
         filter=filter.filter,
         format=formatter.format,
         level=opal_common_config.LOG_LEVEL,