java - Logstash-logback 事件特定的自定义字段(使用 StructuredArguments)未添加到 JSON

Question

我正在尝试使用 logstash documentation 将特定于事件的字段添加到记录器语句之一.我的记录器声明如下:

LOGGER.info("Executed REST request time={}ms", StructuredArguments.value("request_time_ms", elapsedTimeMs));

根据文档:

StructuredArguments will be included in the JSON output if using LogstashEncoder/Layout or if using composite encoders/layouts with the arguments provider

这意味着 StructuredArguments只要我使用 LogstashEncoder 就可以正常工作:

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
    </encoder>
</appender>

但还是 request_time_ms输出 JSON 中缺少:

{
    "@timestamp": "2018-09-20T14:00:43.560+03:00",
    "@version": 1,
    "appname": "my_app",
    "level": "INFO",
    "level_value": 20000,
    "logger_name": "com.example.MetricsAspect",
    "message": "Executed REST request time=258ms",
    "thread_name": "main"
}

Answer 1

看来StructuredArguments即使您使用 LogstashEncoder 也不会包含在 JSON 中直到您明确添加 ArgumentsJsonProvider :

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
        <provider class="net.logstash.logback.composite.loggingevent.ArgumentsJsonProvider"/>
    </encoder>
</appender>

现在它按预期工作:

{
    "@timestamp": "2018-09-20T15:43:11.019+03:00",
    "@version": 1,
    "appname": "my_app",
    "level": "INFO",
    "level_value": 20000,
    "logger_name": "com.example.MetricsAspect",
    "message": "Executed REST request time=337ms",
    "request_time_ms": 337,
    "thread_name": "main"
}