Allow Synapse log levels to be configured (#23)

CHANGELOG.md

@@ -1,3 +1,17 @@
+# 2018-11-14
+
+## Ability to set Synapse log levels
+
+The playbook now allows you to set the log levels used by Synapse. The default logging levels remain the same.
+
+You can now override following variables with any of the supported log levels listed here: https://docs.python.org/3/library/logging.html#logging-levels
+
+```
+matrix_synapse_log_level: "INFO"
+matrix_synapse_storage_sql_log_level: "INFO"
+matrix_synapse_root_log_level: "INFO"
+```
+
 # 2018-11-03
 
 ## Customize parts of Riot's config

roles/matrix-server/defaults/main.yml

@@ -63,6 +63,14 @@ matrix_synapse_max_upload_size_mb: 10
 matrix_synapse_max_log_file_size_mb: 100
 matrix_synapse_max_log_files_count: 10
 
+# Log levels 
+# Possible options are defined here https://docs.python.org/3/library/logging.html#logging-levels
+# warning: setting log level to DEBUG will make synapse log sensitive information such 
+# as access tokens
+matrix_synapse_log_level: "INFO"
+matrix_synapse_storage_sql_log_level: "INFO"
+matrix_synapse_root_log_level: "INFO"
+
 # Rate limits
 matrix_synapse_rc_messages_per_second: 0.2
 matrix_synapse_rc_message_burst_count: 10.0

roles/matrix-server/templates/synapse/synapse.log.config.j2

@@ -25,12 +25,12 @@ handlers:
 
 loggers:
     synapse:
-        level: INFO
+        level: {{ matrix_synapse_log_level }}
 
     synapse.storage.SQL:
         # beware: increasing this to DEBUG will make synapse log sensitive
         # information such as access tokens.
-        level: INFO
+        level: {{ matrix_synapse_storage_sql_log_level }}
 
 {% for logger in matrix_synapse_additional_loggers %}
     {{ logger.name }}:
@@ -38,5 +38,5 @@ loggers:
 {% endfor %}
 
 root:
-    level: INFO
+    level: {{ matrix_synapse_root_log_level }}
     handlers: [file, console]