http.server.* metrics are missing

[cooperbenson-qz]

I'm using this project to run a local metrics stack for development, but I've noticed a strange behavior. For some reason, the http.server.request.duration, http.server.request.body.size, and http.server.response.body.size metrics are completely missing from Grafana. I don't think it's an application side issue considering that the metrics are successfully collected from our deployed services. I took a look at the collector and Prometheus config files but nothing stuck out to me that would be filtering out these metrics. Can anyone help me sort out where these metrics are going?

[martincostello]

We use the LGTM image in our OATs tool, which we use for testing our grafana-opentelemetry-dotnet repo.

I just opened a PR to explicitly add an assertion on http_server_request_duration_seconds_count and it passes as expected.

Things I'd suggest to check include:

1. Are you searching for the right metric names in Grafana?
2. Are you waiting long enough for the metrics to be exported? Out of the box metrics are typically exported every minute. You can override this with the OTEL_METRIC_EXPORT_INTERVAL environment variable (example).
3. Are you using the latest version of the lgtm image?

Without a repro project to take a look at to potentially debug, this sounds like an application and/or configuration issue given that this is working as expected in our .NET distro's tests that use lgtm:latest.