Merge pull request #81 from dtrsan/logback_root_level_override

Allow to override root log level

README.md

@@ -50,6 +50,12 @@ They can be used as follows:
 docker run -it --rm -p 9000:9000 -e KAFKA_ENDPOINT=127.0.0.1:9092 registry.opensource.zalan.do/machina/remora
 ```
 
+Run it with different log level:
+
+```bash
+docker run -it --rm -p 9000:9000 -e KAFKA_ENDPOINT=127.0.0.1:9092 -e 'JAVA_OPTS=-Dlogback-root-level=INFO' registry.opensource.zalan.do/machina/remora
+```
+
 For further examples see the [docker-compose.yml](basic-example/docker-compose.yml)
 
 ```bash

src/main/resources/logback.xml

@@ -10,7 +10,7 @@
     <logger name="org.apache.kafka" level="ERROR" />
     <logger name="org.apache.zookeeper" level="ERROR" />
 
-    <root level="debug">
+    <root level="${logback-root-level:-debug}">
         <appender-ref ref="stdout" />
     </root>