configure json logging for uwsgi in k8s environments

deploy/kubernetes/uat/atst-configmap.yml

@@ -10,6 +10,26 @@ data:
     callable = app
     module = app
     socket = /var/run/uwsgi/uwsgi.socket
-    plugins = python3
+    plugin = python3
+    plugin = logfile
     virtualenv = /opt/atat/atst/.venv
     chmod-socket = 666
+
+    ; logger config
+
+    ; application logs: log without modifying
+    logger = secondlogger stdio
+    log-route = secondlogger atst
+    log-encoder = format:secondlogger ${msg}
+
+    ; default uWSGI messages (start, stop, etc.)
+    logger = default stdio
+    log-route = default ^((?!atst).)*$
+    log-encoder = json:default {"timestamp":"${strftime:%%FT%%T}","source":"uwsgi","severity":"DEBUG","message":"${msg}"}
+    log-encoder = nl
+
+    ; uWSGI request logs
+    logger-req = stdio
+    log-format = request_id=%(var.HTTP_X_REQUEST_ID), pid=%(pid), remote_add=%(addr), request=%(method) %(uri), status=%(status), body_bytes_sent=%(rsize), referer=%(referer), user_agent=%(uagent), http_x_forwarded_for=%(var.HTTP_X_FORWARDED_FOR)
+    log-req-encoder = json {"timestamp":"${strftime:%%FT%%T}","source":"req","severity":"INFO","message":"${msg}"}
+    log-req-encoder = nl