使用Golang Opentelemetry（Otel）覆盖跨度的启动时间和终点

发布于 2025-01-20 03:22:52 字数 1231 浏览 0 评论 0原文

我正在对在进行跟踪之前收集的数据生成跟踪。这意味着跨度创建时间与实际开始时间不匹配。

我过去已经能够使用 opentracing 来做到这一点：

span := tracer.StartSpan(
    name,
    opentracing.StartTime(startTime),
)

我一直无法在 golang otel 库中找到等效项。我的印象是应该有可能基于规范中的引用：

开始时间戳，默认为当前时间。仅当跨度创建时间已经过去时才应设置此参数。如果在 Span 逻辑启动时调用 API，API 用户不得显式设置此参数。

“默认”一词意味着应该可以在创建跨度后更改此时间戳。

我尝试过使用 span.SetAttributes：

span.SetAttributes(attribute.Int64("StartTime", 0))

但这（毫不奇怪）设置了一个属性：

{
        // ...
        "StartTime": "2022-04-09T12:28:57.271375+10:00",
        "EndTime": "2022-04-09T12:28:57.271417375+10:00",
        "Attributes": [
                {
                        "Key": "StartTime",
                        "Value": {
                                "Type": "INT64",
                                "Value": 0
                        }
                },
         // ...
}

原文

I am producing traces for data that was collected before I am doing the tracing. This means that the span creation time does not match up with the real start time.

I have been able to do this in the past using opentracing:

span := tracer.StartSpan(
    name,
    opentracing.StartTime(startTime),
)

I have been unable to find an equivalent in the golang otel libraries. I get the impression that it should be possible based on this quote from the spec:

Start timestamp, default to current time. This argument SHOULD only be set when span creation time has already passed. If API is called at a moment of a Span logical start, API user MUST NOT explicitly set this argument.

The word "default" implies that it should be possible to change this timestamp after span creation.

I have tried using span.SetAttributes:

span.SetAttributes(attribute.Int64("StartTime", 0))

But this (unsurprisingly) sets an attribute:

{
        // ...
        "StartTime": "2022-04-09T12:28:57.271375+10:00",
        "EndTime": "2022-04-09T12:28:57.271417375+10:00",
        "Attributes": [
                {
                        "Key": "StartTime",
                        "Value": {
                                "Type": "INT64",
                                "Value": 0
                        }
                },
         // ...
}

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绝不放开 2025-01-27 03:22:52

您需要使用 withtimestamp 。

startTime := time.Now()
ctx, span := tracer.Start(ctx, "foo", trace.WithTimestamp(startTime))

// do your work

span.End(trace.WithTimestamp(time.Now()))

You need to use WithTimestamp.

startTime := time.Now()
ctx, span := tracer.Start(ctx, "foo", trace.WithTimestamp(startTime))

// do your work

span.End(trace.WithTimestamp(time.Now()))

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