【log4j2】springboot使用log4j2詳細配置
阿新 • • 發佈：2020-09-14
本文主要講解：
1、一個日誌配置檔案如何拆分
2、不同服務的日誌如何劃分
3、日誌如何滾動
4、日誌過期策略
5、非同步日誌
1、日誌拆分
日誌配置檔案拆分,例如以下完整的日誌配置檔案
<?xml version="1.0" encoding="UTF-8"?> <configuration status="DEBUG"> <properties> <!--日誌格式--> <property name="PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %X{TRACE_ID} [%thread] %-5level %logger[%L] - %m%n"/> <!--日誌編碼--> <property name="CHARSET" value="utf-8"/> <!--單個日誌檔案大小--> <property name="MAX_FILE_SIZE" value="200MB"/> <!--日誌儲存時間--> <property name="MAX_HISTORY" value="P30D"/> <!--日誌根路徑--> <property name="BASE_LOG_PATH" value="/data/logs"/> <!--日誌應用名，例如拼接完整的日誌路徑：/data/logs/app/app-info.log--> <property name="SERVER_NAME" value="${sys:SERVICE_NAME}"/> </properties> <appenders> <Console name="CONSOLE" target="SYSTEM_OUT"> <PatternLayout pattern="${PATTERN}" charset="${CHARSET}"/> </Console> <RollingRandomAccessFile name="FILE-INFO" fileName="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-info.log" filePattern="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-info.%d{yyyy-MM-dd}-%i.log.gz"> <LevelRangeFilter minLevel="WARN" maxLevel="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/> <PatternLayout pattern="${PATTERN}" charset="${CHARSET}"/> <Policies> <!--每天滾動一次--> <TimeBasedTriggeringPolicy interval="1"/> <!--或者日誌達到10KB 滾動一次--> <SizeBasedTriggeringPolicy size="10KB"/> </Policies> <!--日誌刪除策略--> <DefaultRolloverStrategy fileIndex="nomax"> <Delete basePath="${BASE_LOG_PATH}/${SERVER_NAME}" maxDepth="2"> <IfFileName glob="*-info.*.log.gz"/> <IfLastModified age="P1D"/> </Delete> </DefaultRolloverStrategy> </RollingRandomAccessFile> <RollingRandomAccessFile name="FILE-ERROR" fileName="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-error.log" filePattern="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-error.%d{yyyy-MM-dd}-%i.log.gz"> <ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY"/> <PatternLayout pattern="${PATTERN}" charset="${CHARSET}"/> <Policies> <!--每天滾動一次--> <TimeBasedTriggeringPolicy interval="1"/> <!--或者日誌達到10KB 滾動一次--> <SizeBasedTriggeringPolicy size="10KB"/> </Policies> <!--日誌刪除策略--> <DefaultRolloverStrategy fileIndex="nomax"> <Delete basePath="${BASE_LOG_PATH}/${SERVER_NAME}" maxDepth="2"> <IfFileName glob="*-error.*.log.gz"/> <IfLastModified age="P1D"/> </Delete> </DefaultRolloverStrategy> </RollingRandomAccessFile> </appenders> <loggers> <AsyncRoot level="DEBUG" includeLocation="true" > <AppenderRef ref="CONSOLE"/> </AsyncRoot> <AsyncLogger name="com.luna" level="INFO" includeLocation="true" > <appender-ref ref="FILE-INFO"/> <appender-ref ref="FILE-ERROR"/> </AsyncLogger> <AsyncLogger name="druid.sql.Statement" level="DEBUG" additivity="false" includeLocation="true" > <appender-ref ref="CONSOLE"/> <appender-ref ref="FILE-INFO"/> </AsyncLogger> </loggers> </configuration>
在單個專案中這個配置檔案可以直接使用，但是在聚合專案中，我們不可能在每個專案都寫一遍完整的日誌配置檔案。如果這樣做，1，容易寫錯造成日誌格式的不統一、2，假如你更改了日誌配置，需要更改多個配置檔案容易遺漏
所以我們常規做法是將這些公共的配置抽取出來，然後直接引用即可。log4j2的日誌拆分和其它日誌拆分基本差不多（logback，log4j），官方文件：http://logging.apache.org/log4j/2.x/manual/configuration.html#XInclude
從官方文件看出，log4j2的拆分，依賴XInclude
新建log4j-xinclude-property.xml，抽取Properties
<?xml version="1.0" encoding="UTF-8"?> <properties> <!--日誌格式--> <property name="PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %X{TRACE_ID} [%thread] %-5level %logger[%L] - %m%n"/> <!--日誌編碼--> <property name="CHARSET" value="utf-8"/> <!--單個日誌檔案大小--> <property name="MAX_FILE_SIZE" value="200MB"/> <!--日誌儲存時間--> <property name="MAX_HISTORY" value="P30D"/> <!--日誌根路徑--> <property name="BASE_LOG_PATH" value="/data/logs"/> <!--日誌應用名，例如/data/logs/app/app-info.log--> <property name="SERVER_NAME" value="${sys:SERVICE_NAME}"/> </properties>
新建log4j-xinclude-appenders.xml，抽取appenders
<?xml version="1.0" encoding="UTF-8"?> <appenders> <Console name="CONSOLE" target="SYSTEM_OUT"> <PatternLayout pattern="${PATTERN}" charset="${CHARSET}"/> </Console> <RollingRandomAccessFile name="FILE-INFO" fileName="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-info.log" filePattern="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-info.%d{yyyy-MM-dd}-%i.log.gz"> <LevelRangeFilter minLevel="WARN" maxLevel="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/> <PatternLayout pattern="${PATTERN}" charset="${CHARSET}" /> <Policies> <!--每天滾動一次--> <TimeBasedTriggeringPolicy interval="1"/> <!--或者日誌達到10KB 滾動一次--> <SizeBasedTriggeringPolicy size="10KB"/> </Policies> <!--日誌刪除策略--> <DefaultRolloverStrategy fileIndex="nomax"> <Delete basePath="${BASE_LOG_PATH}/${SERVER_NAME}" maxDepth="2"> <IfFileName glob="*-info.*.log.gz"/> <IfLastModified age="P1D"/> </Delete> </DefaultRolloverStrategy> </RollingRandomAccessFile> <RollingRandomAccessFile name="FILE-ERROR" fileName="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-error.log" filePattern="${BASE_LOG_PATH}/${SERVER_NAME}/${SERVER_NAME}-error.%d{yyyy-MM-dd}-%i.log.gz"> <ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY"/> <PatternLayout pattern="${PATTERN}" charset="${CHARSET}" /> <Policies> <!--每天滾動一次--> <TimeBasedTriggeringPolicy interval="1"/> <!--或者日誌達到10KB 滾動一次--> <SizeBasedTriggeringPolicy size="10KB"/> </Policies> <!--日誌刪除策略--> <DefaultRolloverStrategy fileIndex="nomax"> <Delete basePath="${BASE_LOG_PATH}/${SERVER_NAME}" maxDepth="2"> <IfFileName glob="*-error.*.log.gz"/> <IfLastModified age="P1D"/> </Delete> </DefaultRolloverStrategy> </RollingRandomAccessFile> </appenders>
新建log4j-xinclude-loggers.xml，抽取loggers
<?xml version="1.0" encoding="UTF-8"?> <loggers> <AsyncRoot level="DEBUG" includeLocation="true" > <AppenderRef ref="CONSOLE"/> </AsyncRoot> <AsyncLogger name="com.luna" level="INFO" includeLocation="true" > <appender-ref ref="FILE-INFO"/> <appender-ref ref="FILE-ERROR"/> </AsyncLogger> <AsyncLogger name="druid.sql.Statement" level="DEBUG" additivity="false" includeLocation="true" > <appender-ref ref="CONSOLE"/> <appender-ref ref="FILE-INFO"/> </AsyncLogger> </loggers>
最後新建log4j2.xml引用即可
<?xml version="1.0" encoding="UTF-8"?> <configuration xmlns:xi="http://www.w3.org/2001/XInclude" status="DEBUG" name="XIncludeDemo"> <!--常量配置--> <xi:include href="log4j-xinclude-property.xml"/> <!--appenders--> <xi:include href="log4j-xinclude-appenders.xml" /> <!--loggers--> <xi:include href="log4j-xinclude-loggers.xml" /> </configuration>
完整的配置截圖
2、