gcp: Cloud Run Application details are not labeled on traces

[ahmetb]

I am opening this issue because of this file that does Cloud Run detection

opentelemetry-go-contrib/detectors/gcp/cloud-run.go

Lines 95 to 105 in f2fb9c8

	// Part of Cloud Run container runtime contract.
	// See https://cloud.google.com/run/docs/reference/container-contract
	if service := c.getenv("K_SERVICE"); service == "" {
	errInfo = append(errInfo, "envvar K_SERVICE contains empty string.")
	} else {
	attributes = append(attributes, semconv.ServiceNameKey.String(service))
	}
	resource, err := resource.New(ctx, resource.WithAttributes(attributes...))
	if err != nil {
	errInfo = append(errInfo, err.Error())
	}

Please migrate the issue to the right repo if that's wrong.

Right now, it seems that the traces are exported (from libraries such as otelgrpc or otelmux) do not properly label the Cloud Run service details such as:

• service name
• service revision (a Cloud Run concept)
• region (a GCP concept)
• project ID (a GCP concept)

as a result, the Google Cloud Trace UI shows something like this which is not linking back to the Cloud Run service properly:

I expected to get labels out of the trace spans that contain the application info

[dashpole]

I was able to get this to work when I tried it. See GoogleCloudPlatform/golang-samples@main...dashpole:opentelemetry_demo#diff-5351ce38b44519584b4f0959dc4095b977aa13372f7873f3d82f8c70daf85236R65-R68 for how to use the resource detector. Are you installing the cloud run detector?

In my service's logs, when I send a request to the service, I get this:

...
Resource: [
  0: {
    Key: "cloud.account.id"
    Value: {
      Type: "STRING"
      Value: "<project id>"
    }}
  1: {
    Key: "cloud.provider"
    Value: {
      Type: "STRING"
      Value: "gcp"
    }}
  2: {
    Key: "cloud.region"
    Value: {
      Type: "STRING"
      Value: "projects/<project number>/regions/us-east1"
  }}
  3: {
    Key: "service.instance.id"
    Value: {
      Type: "STRING"
      Value: "<ID>"
  }}
  4: {
    Key: "service.name"
    Value: {
      Type: "STRING"
      Value: "helloworld"
  }}
  5: {
    Key: "service.namespace"
    Value: {
      Type: "STRING"
      Value: "cloud-run-managed"
  }}
]

[dashpole]

Feel free to reopen if you have further qustions