metrics: Expose go_sched_latencies_seconds

It's a useful metric. From https://pkg.go.dev/runtime/metrics: /sched/latencies:seconds Distribution of the time goroutines have spent in the scheduler in a runnable state before actually running. Bucket counts increase monotonically. Signed-off-by: Anna Kapuscinska <[email protected]>
cilium · Aug 15, 2024 · 52e082e · 52e082e
1 parent ecdb38f
commit 52e082e
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diff --git a/docs/content/en/docs/reference/metrics.md b/docs/content/en/docs/reference/metrics.md
diff --git a/pkg/metricsconfig/initmetrics.go b/pkg/metricsconfig/initmetrics.go
@@ -4,6 +4,8 @@
 package metricsconfig
 
 import (
+	"regexp"
+
 	"github.com/cilium/tetragon/pkg/metrics/eventmetrics"
 	"github.com/cilium/tetragon/pkg/metrics/syscallmetrics"
 	"github.com/prometheus/client_golang/prometheus"
@@ -12,7 +14,10 @@ import (
 
 func initResourcesMetrics(registry *prometheus.Registry) {
 	// register common third-party collectors
-	registry.MustRegister(collectors.NewGoCollector())
+	registry.MustRegister(collectors.NewGoCollector(
+		collectors.WithGoCollectorRuntimeMetrics(
+			collectors.GoRuntimeMetricsRule{Matcher: regexp.MustCompile(`^/sched/latencies:seconds`)},
+		)))
 	registry.MustRegister(collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}))
 }