Sleuth+logback 设置traceid及自定义信息背景：
分布式系统中，如何快速定位某个用户的请求日志？
使用Sleuth生成的traceid可以跟踪某个请求，但是很多时候我们需要知道traceid 与某个用户的映射关系，方便定位某个用户的日志
方案：
@Component@Order(TraceWebServletAutoConfiguration.TRACING_FILTER_ORDER + 1)public class CustomHttpSpanExtractor extends GenericFilterBean { private final Tracer tracer; CustomHttpSpanExtractor(Tracer tracer) { this.tracer = tracer; } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { Span currentSpan = this.tracer.currentSpan(); if (currentSpan == null) { chain.doFilter(request, response); return; } HttpServletRequest httpRequest = (HttpServletRequest) request; try { // mdc(httpRequest,currentSpan.context().traceIdString()); MDC.put(MdcConstant.USER_ID,"userid-12345"); } catch (Exception e) { e.printStackTrace(); } try { chain.doFilter(request, response); } finally { MDC.clear();//must be,threadLocal } }}
logback 配置
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}[${applicationName},%X{X-B3-TraceId:-},%X{userId:-}] [%thread] %-5level %logger{50} - %msg%n</pattern>
logback简单使用，自定义key1.logback的pom依赖
<dependency> <groupId>net.logstash.logback</groupId> <artifactId>logstash-logback-encoder</artifactId> <version>4.11</version></dependency>
2.配置文件: logback.xml
<?xml version="1.0" encoding="UTF-8"?><configuration scan="false" scanPeriod="5000" debug="false"> <springProperty scope="context" name="springAppName" source="spring.application.name" defaultValue="defaultAppName"/> <timestamp key="bySecond" datePattern="yyyy-MM-dd HH:mm:ss"/> <appender name="STASH-REDIS" class="com.jlb.yts.common.util.aop.RedisAppender"> <key>${springAppName:-}</key> <!-- <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>ALL</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> --> <layout> <pattern> { "time": "%d{yyyy-MM-dd HH:mm:ss}", "application":"tech_cloud", "subapplication":"${springAppName:-}", "level": "%level", "trace": "%X{X-B3-TraceId:-}", "span": "%X{X-B3-SpanId:-}", "parent": "%X{X-B3-ParentSpanId:-}", "classname": "%logger{100}", "msg": "%message" } </pattern> </layout> </appender> <appender name="ASYNC" class="ch.qos.logback.classic.AsyncAppender"> <!-- 不丢失日志.默认的,如果队列的80%已满,则会丢弃TRACT、DEBUG、INFO级别的日志 --> <discardingThreshold>0</discardingThreshold> <!-- 更改默认的队列的深度,该值会影响性能.默认值为256 --> <queueSize>5120</queueSize> <appender-ref ref="STASH-REDIS" /> </appender> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder charset="UTF-8"> <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{40} - %msg%n</pattern> </encoder> </appender> <logger name="com.jlb.yts" additivity="true" level="ERROR"> <appender-ref ref="ASYNC" /> </logger> <logger name="com.jlb.yts" additivity="true" level="INFO"> <appender-ref ref="ASYNC" /> </logger> <!-- mongodb打印语句 --> <logger name="org.springframework.data.mongodb.core" level="DEBUG"/> <logger name="com.jlb.yts" additivity="true" level="DEBUG"> <appender-ref ref="ASYNC" /> </logger> <root level="INFO"> <appender-ref ref="STDOUT" /> </root></configuration>
3.自定义appender
package com.jlb.yts.common.util.aop;import ch.qos.logback.classic.spi.ILoggingEvent;import ch.qos.logback.classic.spi.IThrowableProxy;import ch.qos.logback.classic.spi.LoggingEvent;import ch.qos.logback.classic.spi.StackTraceElementProxy;import ch.qos.logback.core.Layout;import ch.qos.logback.core.UnsynchronizedAppenderBase;import ch.qos.logback.core.filter.Filter;import com.jlb.yts.common.util.redis.RedisHandle;import com.jlb.yts.common.util.redis.ReidsConnect;import net.logstash.logback.layout.LoggingEventCompositeJsonLayout;import java.lang.reflect.Field;public class RedisAppender extends UnsynchronizedAppenderBase<ILoggingEvent> { public static String service; Layout<ILoggingEvent> layout; public void setFilter(Filter<ILoggingEvent> filter) { if(filter != null){ this.addFilter(filter); } } String key = null; public RedisAppender() { layout = new LoggingEventCompositeJsonLayout(); } private final static RedisHandle redisHandle = ReidsConnect.init("redis-log.properties","redis-log.properties"); @Override protected void append(ILoggingEvent event) { try { LoggingEvent loggingEvent = (LoggingEvent) event; String json = layout.doLayout(loggingEvent); redisHandle.addList(key,json); } catch (Exception e) { e.printStackTrace(); } finally { } } public String getKey() { return key; } public void setKey(String key) { String prefix = (System.getenv("APPLICATION_ENV") == null)?"dev":System.getenv("APPLICATION_ENV"); key = prefix + "-" + key; this.key = key; } public Layout<ILoggingEvent> getLayout() { return layout; } public void setLayout(Layout<ILoggingEvent> layout) { this.layout = layout; }}
4.代码实例
//注意导入的包都是slf4j的包import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class LogbackTest { private static final Logger LOGGER = LoggerFactory.getLogger(LogbackTest.class); public static void main(String[] args) { LOGGER.trace("logback的--trace日志--输出了"); LOGGER.debug("logback的--debug日志--输出了"); LOGGER.info("logback的--info日志--输出了"); LOGGER.warn("logback的--warn日志--输出了"); LOGGER.error("logback的--error日志--输出了"); }}
5.日志添加自定义KEY
import org.slf4j.MDC;MDC.put(key, value);
logback.xml 配置
"key":"%X{key:-}"
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
人的价值，在遭受诱-惑的一瞬间被决定
