Improve logging configuration (#402)

indico_rock/etc/logging.yaml

@@ -30,9 +30,9 @@ root:
 
 loggers:
  indico:
- handlers: [indico]
+ handlers: [indico, email]
  celery:
- handlers: [celery, stderr]
+ handlers: [celery, email, stderr]
 
 handlers:
  indico:
@@ -54,12 +54,20 @@ handlers:
  stderr:
  class: logging.StreamHandler
  formatter: default
+ email:
+ class: indico.core.logger.FormattedSubjectSMTPHandler
+ formatter: email
+ level: ERROR
 
 formatters:
  default:
  format: '%(asctime)s %(levelname)-7s %(request_id)s %(user_id)-6s %(name)-25s %(message)s'
  simple:
  format: '%(asctime)s %(levelname)-7s %(name)-25s %(message)s'
+ email:
+ append_request_info: true
+ format: "%(asctime)s %(request_id)s %(user_id)-6s %(name)s - %(levelname)s %(filename)s:%(lineno)d -- %(message)s\n\n"
+
 
 filters:
  indico: