spring logback json 출력

마이크로 서비스에서는 json 로그로 저장되도록 하는 것이 중요한데..

logback에 json 출력 기능이 있다. 

logstash logback 라이브러리를 쓰는 것도 있지만.. (아래 링크 참조)

http://knight76.tistory.com/entry/log-log4j%EC%97%90%EC%84%9C-json-%EB%A1%9C%EA%B7%B8%EB%A5%BC-%EC%B6%9C%EB%A0%A5%ED%95%98%EB%8F%84%EB%A1%9D-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0

 spring boot의 logback에도 json 출력한다.

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

<include resource="org/springframework/boot/logging/logback/defaults.xml" />

<property name="LOG_FILE"

value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}" />

<include resource="org/springframework/boot/logging/logback/console-appender.xml" />

<appender name="JSON_FILE"

class="ch.qos.logback.core.rolling.RollingFileAppender">

<file>${LOG_PATH}/order-${PID}.json</file>

<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">

<fileNamePattern>order-${PID}.json.%d{yyyy-MM-dd}.gz</fileNamePattern>

<maxHistory>7</maxHistory>

</rollingPolicy>

<encoder

class="net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder">

<providers>

<arguments />

<stackTrace />

<timestamp>

<timeZone>UTC</timeZone>

</timestamp>

<pattern>

<pattern>

{

"severity": "%level",

"service": "order",

"pid": ${PID:-},

"thread": "%thread",

"logger": "%logger",

"message": "%message"

}

</pattern>

</pattern>

</providers>

</encoder>

</appender>

<root level="INFO">

<appender-ref ref="JSON_FILE" />

<appender-ref ref="CONSOLE" />

</root>

</configuration>