opentracing: SpanContext not found in Extract carrier

[zetaab]

Welcome!

• Yes, I've searched similar issues on GitHub and didn't find any.
• Yes, I've searched similar issues on the Traefik community forum and didn't find any.

What did you do?

I am testing opentelemetry. I added following parameters to traefik:

        - --tracing.openTelemetry.address=tempo.tempo.svc.cluster.local:4318
        - --tracing.openTelemetry=true
        - --tracing.openTelemetry.insecure=true

grafana tempo is deployed using https://github.com/grafana/helm-charts/tree/main/charts/tempo

What did you see instead?

After everything is running, I can see that some traces are going to tempo. However, I can see quite a lot of spam:

2023-11-07T10:38:03Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:09Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:09Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:19Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:19Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:29Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:29Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:39Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:39Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:49Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:49Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:59Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint
2023-11-07T10:38:59Z DBG go/src/github.com/traefik/traefik/pkg/middlewares/tracing/entrypoint.go:39 > Failed to extract the context error="opentracing: SpanContext not found in Extract carrier" middlewareName=tracing middlewareType=TracingEntryPoint

that is coming from https://github.com/traefik/traefik/blob/v3.0/pkg/middlewares/tracing/entrypoint.go#L36-L39

What version of Traefik are you using?

I am using latest from v3.0 branch currently

What is your environment & configuration?

        - --global.checknewversion
        - --entrypoints.metrics.address=:9100/tcp
        - --entrypoints.traefik.address=:9000/tcp
        - --entrypoints.web.address=:8000/tcp
        - --entrypoints.websecure.address=:8443/tcp
        - --api.dashboard=true
        - --ping=true
        - --metrics.prometheus=true
        - --metrics.prometheus.entrypoint=metrics
        - --providers.kubernetescrd
        - --providers.kubernetesingress
        - --providers.kubernetesingress.ingressendpoint.publishedservice=traefik-external/traefik
        - --providers.kubernetesingress.ingressClass=traefik-external
        - --entrypoints.web.http.redirections.entrypoint.to=:443
        - --entrypoints.web.http.redirections.entrypoint.scheme=https
        - --entrypoints.web.proxyProtocol.trustedIPs=127.0.0.1,100.64.0.0/11,100.96.0.0/11
        - --entrypoints.websecure.http.tls=true
        - --entrypoints.websecure.proxyProtocol.trustedIPs=127.0.0.1,100.64.0.0/11,100.96.0.0/11
        - --tracing.openTelemetry.address=tempo.tempo.svc.cluster.local:4318
        - --tracing.openTelemetry=true
        - --tracing.openTelemetry.insecure=true
        - --log.level=DEBUG

Add more configuration information here.

If applicable, please paste the log output in DEBUG level

No response

[zetaab]

actually this is working "like should". This means that there is no incoming trace. However, I am just thinking is it really worth of logging this this heavily(?) even with debug.