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This pull request introduces the package trace that wraps a datastore and applies open telemetry tracing to all datastore interactions.

@dennis-tra dennis-tra force-pushed the traced-datastore branch 4 times, most recently from 90cb93c to 9568b48 Compare August 23, 2023 09:30
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@Stebalien Stebalien left a comment

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Two nits, but this otherwise looks great!

// Put implements the ds.Datastore interface.
func (t *Datastore) Put(ctx context.Context, key ds.Key, value []byte) (err error) {
ctx, span := t.tracer.Start(ctx, "Put", otel.WithAttributes(attribute.String("key", key.String())))
defer span.End()
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We're not tracing errors anywhere. We probably want to call span.RecordError(err) for all errors here (it'll ignore nil errors).

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ah good point, I guess it also makes sense to set the status then:

	// RecordError will record err as an exception span event for this span. An
	// additional call to SetStatus is required if the Status of the Span should
	// be set to Error, as this method does not change the Span status. If this
	// span is not being recorded or err is nil then this method does nothing.

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Well, that API is bonkers. But ok.

// Put implements the ds.Datastore interface.
func (t *Datastore) Put(ctx context.Context, key ds.Key, value []byte) (err error) {
ctx, span := t.tracer.Start(ctx, "Put", otel.WithAttributes(attribute.String("key", key.String())))
defer span.End()
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Well, that API is bonkers. But ok.

@Stebalien Stebalien merged commit 1caa244 into ipfs:master Sep 1, 2023
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2 participants