root: add process ID to logging output

.isort.cfg

@@ -0,0 +1,6 @@
+[settings]
+multi_line_output=3
+include_trailing_comma=True
+force_grid_wrap=0
+use_parentheses=True
+line_length=88

passbook/lib/logging.py

@@ -0,0 +1,9 @@
+"""logging helpers"""
+from os import getpid
+
+
+# pylint: disable=unused-argument
+def add_process_id(logger, method_name, event_dict):
+    """Add the current process ID"""
+    event_dict["pdi"] = getpid()
+    return event_dict

passbook/root/settings.py

@@ -22,6 +22,7 @@ from sentry_sdk.integrations.django import DjangoIntegration
 
 from passbook import __version__
 from passbook.lib.config import CONFIG
+from passbook.lib.logging import add_process_id
 from passbook.lib.sentry import before_send
 
 LOGGER = structlog.get_logger()
@@ -279,6 +280,7 @@ structlog.configure_once(
     processors=[
         structlog.stdlib.add_log_level,
         structlog.stdlib.add_logger_name,
+        add_process_id,
         structlog.stdlib.PositionalArgumentsFormatter(),
         structlog.processors.TimeStamper(),
         structlog.processors.StackInfoRenderer(),