Docker compose quick start missing metrics

[rejuvenile]

I've enabled metrics via the Docker Compose quick start (at https://nativelink.com/docs/deployment-examples/metrics), but I find Grafana can't see any cache stats. The only metrics it finds are:

nativelink:actions_per_worker
nativelink:execution_active_by_stage
nativelink:queue_depth
nativelink:worker_utilization
nativelink_execution_active_count
nativelink_execution_completed_count_total
nativelink_execution_stage_transitions_total
nativelink_target_info

I'm looking for nativelink_cache_hit_rate.

[MarcusSorealheis]

I've opened a PR that should work for you. I hope so anyway,

[rejuvenile]

I don't think this fixed it for me. I get a few more metrics, but none of the cached ones. It could be user error as I have some port conflicts on my machine which I patch up locally, but I don't understand why I would get some but not others.

Additionally, I had to make this patch to avoid 404s:

diff --git a/deployment-examples/metrics/otel-collector-config.yaml b/deployment-examples/metrics/otel-collector-config.yaml
index c9aac88a..dee5e8c2 100644
--- a/deployment-examples/metrics/otel-collector-config.yaml
+++ b/deployment-examples/metrics/otel-collector-config.yaml
@@ -60,7 +60,7 @@ exporters:

   # Direct OTLP export to Prometheus (when Prometheus has OTLP receiver enabled)
   otlphttp/prometheus:
-    endpoint: http://prometheus:9090/api/v1/otlp/v1/metrics
+    endpoint: http://prometheus:9090/api/v1/otlp
     compression: gzip
     retry_on_failure:
       enabled: true

... otherwise, v1/metrics appears twice in the final URL string:

otel-collector  | 2025-12-16T18:53:24.216Z      error   exporterhelper/queue_sender.go:101      Exporting failed. Dropping data.        {"service": "otel-collector", "kind": "exporter", "data_type": "metrics", "name": "otlphttp/prometheus", "error": "not retryable error: Permanent error: error exporting items, request to http://prometheus:9090/api/v1/otlp/v1/metrics/v1/metrics responded with HTTP Status Code 404", "dropped_items": 1775}

[MarcusSorealheis]

oof. Sorry.

[MarcusSorealheis]

I'll credit you in the PR if you'd like.