[GitHub] [incubator-kyuubi] yaooqinn commented on a change in pull request #1302: [DOC] Monitoring Kyuubi - Logging System

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yaooqinn commented on a change in pull request #1302:
URL: https://github.com/apache/incubator-kyuubi/pull/1302#discussion_r737371256



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File path: docs/monitor/logging.md
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@@ -21,11 +21,224 @@
 
 </div>
 
-# Logging
+# Monitoring Kyuubi - Logging System
 
-## Server Logging
+Kyuubi uses [Apache Log4j](https://logging.apache.org/log4j/2.x/) for logging.
 
-## Process Logging
+In general, there are mainly three components in the Kyuubi architecture that will produce component-oriented logs to help you trace breadcrumbs for SQL workloads against Kyuubi.
 
-## Operation Logging
+- Logs of Kyuubi Server
+- Logs of Kyuubi Engines
+- Operation logs
 
+In addition, a Kyuubi deployment for production usually relies on some other external systems.
+For example, both Kyuubi servers and engines will use [Apache Zookeeper](https://zookeeper.apache.org/) for service discovery.
+The instructions for external system loggings will not be included in this article.
+
+## Logs of Kyuubi Server
+
+Logs of Kyuubi Server show us the activities of the server instance including how start/stop, how does it response client requests, etc.
+
+### Configuring Server Logging
+
+#### Basic Configurations
+
+You can configure it by adding a `log4j.properties` file in the `$KYUUBI_HOME/conf` directory.
+One way to start is to make a copy of the existing `log4j.properties.template` located there.
+
+For example,
+
+```shell
+# cd $KYUUBI_HOME
+cp conf/log4j.properties.template conf/log4j.properties

Review comment:
       Nah, it's an example for practicing




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