Implement metrics and cli

pkg/cleaner/cleaner.go

@@ -2,6 +2,7 @@ package cleaner
 
 import (
 	"fmt"
+	"github.com/cyrilix/pod-cleaner/pkg/metrics"
 	"github.com/cyrilix/pod-cleaner/pkg/monitor"
 	"go.uber.org/zap"
 	"regexp"
@@ -34,6 +35,17 @@ type PodWatcher struct {
 	podIdErrors string
 }
 
+func (w *PodWatcher) Close() error {
+	close(w.cancel)
+	if w.m != nil {
+		err := w.m.Close()
+		if err != nil {
+			zap.S().Errorf("unable to close monitor resource: %v", err)
+		}
+	}
+	return nil
+}
+
 func (w *PodWatcher) GetNumErrors() int {
 	w.muPodError.RLock()
 	defer w.muPodError.RUnlock()
@@ -79,4 +91,6 @@ func (w *PodWatcher) processLogRecord(line string) {
 	defer w.muPodError.Unlock()
 	w.numErrors = numErrors
 	w.podIdErrors = w.rex.FindStringSubmatch(line)[w.rex.SubexpIndex("podId")]
+
+	metrics.NumErrors.Set(float64(numErrors))
 }

pkg/metrics/metrics.go

@@ -0,0 +1,17 @@
+package metrics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var (
+	NumErrors = promauto.NewGauge(
+		prometheus.GaugeOpts{
+			Namespace: "infra",
+			Subsystem: "pod_cleaner",
+			Name:      "orphans_pod_error_count",
+			Help:      "Number of orphan pods that failed to be cleaned",
+		},
+	)
+)