Update metric names to match Prometheus conventions

go.mod

@@ -23,6 +23,7 @@ require (
 	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/google/pprof v0.0.0-20241210010833-40e02aabc2ad // indirect
 	github.com/kr/text v0.2.0 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.62.0 // indirect

go.sum

@@ -23,6 +23,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/onsi/ginkgo/v2 v2.22.2 h1:/3X8Panh8/WwhU/3Ssa6rCKqPLuAkVY2I0RoyDLySlU=

metrics/metric_observer.go

@@ -13,25 +13,25 @@ var _ async.RoutinesObserver = (*metricObserver)(nil)
 type metricObserver struct{}
 
 var (
-	runningManagedRoutinesCount = prometheus.NewGauge(
+	runningRoutines = prometheus.NewGauge(
 		prometheus.GaugeOpts{
-			Name: "async_routine_manager_routines_total",
-			Help: "The total number of running manager routines.",
+			Name: "async_routine_manager_routines",
+			Help: "Number of running routines.",
 		},
 	)
 
-	runningManagedRoutinesByNameCount = prometheus.NewGaugeVec(
+	runningRoutinesByName = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
-			Name: "async_routine_manager_routines_instances_count",
-			Help: "The total number of running instance of a given routine.",
+			Name: "async_routine_manager_routine_instances",
+			Help: "Number of running instances of a given routine.",
 		},
 		[]string{"routine_name", "data"},
 	)
 )
 
 func init() {
-	prometheus.MustRegister(runningManagedRoutinesCount)
-	prometheus.MustRegister(runningManagedRoutinesByNameCount)
+	prometheus.MustRegister(runningRoutines)
+	prometheus.MustRegister(runningRoutinesByName)
 }
 
 func mapToString(m map[string]string) string {
@@ -55,13 +55,13 @@ func mapToString(m map[string]string) string {
 }
 
 func (m *metricObserver) RoutineStarted(routine async.AsyncRoutine) {
-	runningManagedRoutinesByNameCount.
+	runningRoutinesByName.
 		With(prometheus.Labels{"routine_name": routine.Name(), "data": mapToString(routine.GetData())}).
 		Inc()
 }
 
 func (m *metricObserver) RoutineFinished(routine async.AsyncRoutine) {
-	runningManagedRoutinesByNameCount.
+	runningRoutinesByName.
 		With(prometheus.Labels{"routine_name": routine.Name(), "data": mapToString(routine.GetData())}).
 		Dec()
 }
@@ -70,7 +70,7 @@ func (m *metricObserver) RoutineExceededTimebox(routine async.AsyncRoutine) {
 }
 
 func (m *metricObserver) RunningRoutineCount(count int) {
-	runningManagedRoutinesCount.Set(float64(count))
+	runningRoutines.Set(float64(count))
 }
 
 func (m *metricObserver) RunningRoutineByNameCount(name string, count int) {

metrics/metric_observer_test.go

@@ -0,0 +1,19 @@
+package metrics
+
+import (
+	"testing"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/testutil"
+)
+
+func TestPrometheusMetrics(t *testing.T) {
+	problems, err := testutil.GatherAndLint(prometheus.DefaultGatherer)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, p := range problems {
+		t.Errorf("found linting issue: %s: %s", p.Metric, p.Text)
+	}
+}