如何将Log转为Trace - 日志服务

您在使用Logtail采集日志时，可以使用processor_otel_trace插件将采集到的日志转成SLS Trace。本文介绍processor_otel_trace插件的参数说明和配置示例。

功能入口

当您需要使用Logtail插件处理日志时，您可以在创建或修改Logtail采集配置时，添加插件配置。具体操作，请参见处理插件概述。

配置说明

重要

Logtail 1.7.1及以上版本支持processor_otel_trace插件。

表单配置方式

配置处理器类型为Log转Trace，相关参数说明如下表所示。

参数说明

参数	说明
SourceKey	原始字段名。
Format	转换后的格式，可选值： protobuf json protojson
NoKeyError	当日志中没有对应的原始字段时，是否报错。默认值为false。
TraceIDNeedDecode	是否对TraceID进行Base64解码，默认值为false。设置Format为protojson时，如果TraceID已进行过Base64编码，则需要设置TraceIDNeedDecode为true，否则将导致转换失败。
SpanIDNeedDecode	是否对SpanID进行Base64解码。默认值为false。设置Format为protojson时，如果SpanID已进行过Base64编码，则需要设置SpanIDNeedDecode为true，否则将导致转换失败。
ParentSpanIDNeedDecode	是否对ParentSpanID进行Base64解码。默认值为false。设置Format为protojson时，如果ParentSpanID已进行过Base64编码，则需要设置ParentSpanIDNeedDecode为true，否则将导致转换失败。

配置示例

原始日志

INFO OtlpJsonLoggingSpanExporter - {"resource":{"attributes":[]},"scopeSpans":[{"scope":{"name":"io.opentelemetry.spring-webmvc-3.1","version":"1.26.0-alpha","attributes":[]},"spans":[{"traceId":"a7adbcb0921fa4a5b90615d0ad38ef95","spanId":"eecaa7e1b63c9f61","parentSpanId":"fa85fcee7fe0e0e8","name":"HelloWorldController.sayHello","kind":1,"startTimeUnixNano":"1696659118615748056","endTimeUnixNano":"1696659128701715998","attributes":[{"key":"thread.id","value":{"intValue":"48"}},{"key":"thread.name","value":{"stringValue":"http-nio-18080-exec-1"}}],"events":[],"links":[],"status":{}}]},{"scope":{"name":"io.opentelemetry.tomcat-7.0","version":"1.26.0-alpha","attributes":[]},"spans":[{"traceId":"a7adbcb0921fa4a5b90615d0ad38ef95","spanId":"fa85fcee7fe0e0e8","name":"GET /hello","kind":2,"startTimeUnixNano":"1696659118479360000","endTimeUnixNano":"1696659128703706165","attributes":[{"key":"http.status_code","value":{"intValue":"200"}},{"key":"user_agent.original","value":{"stringValue":"curl/7.84.0"}},{"key":"net.host.name","value":{"stringValue":"localhost"}},{"key":"http.response_content_length","value":{"intValue":"12"}},{"key":"http.target","value":{"stringValue":"/hello"}},{"key":"net.sock.peer.addr","value":{"stringValue":"127.0.0.1"}},{"key":"net.host.port","value":{"intValue":"18080"}},{"key":"net.sock.peer.port","value":{"intValue":"53649"}},{"key":"thread.id","value":{"intValue":"48"}},{"key":"thread.name","value":{"stringValue":"http-nio-18080-exec-1"}},{"key":"http.route","value":{"stringValue":"/hello"}},{"key":"net.sock.host.addr","value":{"stringValue":"127.0.0.1"}},{"key":"net.protocol.name","value":{"stringValue":"http"}},{"key":"net.protocol.version","value":{"stringValue":"1.1"}},{"key":"http.scheme","value":{"stringValue":"http"}},{"key":"http.method","value":{"stringValue":"GET"}}],"events":[],"links":[],"status":{}}]}],"schemaUrl":"https://opentelemetry.io/schemas/1.19.0"}

Logtail插件处理配置
处理结果

JSON配置方式

配置type为processor_otel_trace，detail说明如下表所示。

参数说明

参数	类型	是否必选	说明
SourceKey	String	是	原始字段名。
Format	String	是	转换后的格式，可选值：protobuf、json、protojson。
NoKeyError	Boolean	否	当日志中没有对应的原始字段时，是否报错。默认值为false。
TraceIDNeedDecode	Boolean	否	是否对TraceID进行Base64解码，默认值为false。设置Format为protojson时，如果TraceID已进行过Base64编码，则需要设置TraceIDNeedDecode为true，否则将导致转换失败。
SpanIDNeedDecode	Boolean	否	是否对SpanID进行Base64解码。默认值为false。设置Format为protojson时，如果SpanID已进行过Base64编码，则需要设置SpanIDNeedDecode为true，否则将导致转换失败。
ParentSpanIDNeedDecode	Boolean	否	是否对ParentSpanID进行Base64解码。默认值为false。设置Format为protojson时，如果ParentSpanID已进行过Base64编码，则需要设置ParentSpanIDNeedDecode为true，否则将导致转换失败。

配置示例

原始日志

INFO OtlpJsonLoggingSpanExporter - {"resource":{"attributes":[]},"scopeSpans":[{"scope":{"name":"io.opentelemetry.spring-webmvc-3.1","version":"1.26.0-alpha","attributes":[]},"spans":[{"traceId":"a7adbcb0921fa4a5b90615d0ad38ef95","spanId":"eecaa7e1b63c9f61","parentSpanId":"fa85fcee7fe0e0e8","name":"HelloWorldController.sayHello","kind":1,"startTimeUnixNano":"1696659118615748056","endTimeUnixNano":"1696659128701715998","attributes":[{"key":"thread.id","value":{"intValue":"48"}},{"key":"thread.name","value":{"stringValue":"http-nio-18080-exec-1"}}],"events":[],"links":[],"status":{}}]},{"scope":{"name":"io.opentelemetry.tomcat-7.0","version":"1.26.0-alpha","attributes":[]},"spans":[{"traceId":"a7adbcb0921fa4a5b90615d0ad38ef95","spanId":"fa85fcee7fe0e0e8","name":"GET /hello","kind":2,"startTimeUnixNano":"1696659118479360000","endTimeUnixNano":"1696659128703706165","attributes":[{"key":"http.status_code","value":{"intValue":"200"}},{"key":"user_agent.original","value":{"stringValue":"curl/7.84.0"}},{"key":"net.host.name","value":{"stringValue":"localhost"}},{"key":"http.response_content_length","value":{"intValue":"12"}},{"key":"http.target","value":{"stringValue":"/hello"}},{"key":"net.sock.peer.addr","value":{"stringValue":"127.0.0.1"}},{"key":"net.host.port","value":{"intValue":"18080"}},{"key":"net.sock.peer.port","value":{"intValue":"53649"}},{"key":"thread.id","value":{"intValue":"48"}},{"key":"thread.name","value":{"stringValue":"http-nio-18080-exec-1"}},{"key":"http.route","value":{"stringValue":"/hello"}},{"key":"net.sock.host.addr","value":{"stringValue":"127.0.0.1"}},{"key":"net.protocol.name","value":{"stringValue":"http"}},{"key":"net.protocol.version","value":{"stringValue":"1.1"}},{"key":"http.scheme","value":{"stringValue":"http"}},{"key":"http.method","value":{"stringValue":"GET"}}],"events":[],"links":[],"status":{}}]}],"schemaUrl":"https://opentelemetry.io/schemas/1.19.0"}

Logtail插件处理配置

{
  "processors": [
    {
      "type": "processor_split_log_regex",
      "detail": {
        "PreserveOthers": true,
        "SplitKey": "content",
        "SplitRegex": "INFO\\sOtlpJsonLoggingSpanExporter\\s.+"
      }
    },
    {
      "type": "processor_regex",
      "detail": {
        "SourceKey": "content",
        "Regex": "INFO\\sOtlpJsonLoggingSpanExporter\\s-(\\s.+)",
        "Keys": [
          "trace_data"
        ]
      }
    },
    {
      "detail": {
        "SourceKey": "trace_data",
        "Format": "protojson",
        "NoKeyError": true
      },
      "type": "processor_otel_trace"
    }
  ]
}

处理结果