链路跟踪Sleuth日志输出TraceId

1、依赖包配置

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-sleuth</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

2、日志配置

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- 对日志进行格式化 -->
    <encoder>
        <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - [%X{X-B3-TraceId},%X{X-B3-SpanId}] %msg%n</pattern>
    </encoder>
</appender>

%X{X-B3-TraceId}和%X{X-B3-SpanId}可以取到链路的traceId和spanId。