Add TraceID and SpanID to LogBack

[baole229801]

Hi everyone,
I am using my java applications with the opentelemetry agent, these applications use logback. Anyone know how to get the Traceid and SpanID then output it to every log line. Thank you.

[laurit]

Trace and span id are available through MDC

opentelemetry-java-instrumentation/instrumentation/logback/logback-mdc-1.0/library/README.md

Line 42 in d9f7030

<pattern>%d{HH:mm:ss.SSS} trace_id=%X{trace_id} span_id=%X{span_id} trace_flags=%X{trace_flags} %msg%n</pattern>

[baole229801]

Thank @laurit , I now con see the trace_id in log.