add cron expression to version metric

Author: bakito

pkg/metrics/metrics.go

@@ -15,6 +15,7 @@ const (
 	labelValueLatest = "latest"
 	labelExecutionID = "executionID"
 	labelPrefix      = "prefix"
+	labelCron        = "cron"
 
 	versionMetric = "com_github_bakito_batch_job_controller"
 
@@ -167,7 +168,7 @@ func NewPromCollector(cfg *config.Config) (*Collector, error) {
 	c.versionGauge = prom.NewGaugeVec(prom.GaugeOpts{
 		Name: versionMetric,
 		Help: versionHelp,
-	}, []string{config.LabelVersion, config.LabelName, labelPrefix, config.LabelPoolSize, config.LabelReportHistory})
+	}, []string{config.LabelVersion, config.LabelName, labelPrefix, config.LabelPoolSize, config.LabelReportHistory, labelCron})
 
 	for name, metric := range cfg.Metrics.Gauges {
 		if name == procErrorMetric || name == durationMetric || name == podsMetric {
@@ -195,6 +196,7 @@ func NewPromCollector(cfg *config.Config) (*Collector, error) {
 		cfg.Metrics.Prefix,
 		strconv.Itoa(cfg.PodPoolSize),
 		strconv.Itoa(cfg.ReportHistory),
+		cfg.CronExpression,
 	).Set(1)
 
 	return c, nil

pkg/metrics/metrics_test.go

@@ -19,7 +19,8 @@ var _ = Describe("metrics", func() {
 	var cfg *config.Config
 	BeforeEach(func() {
 		cfg = &config.Config{
-			Metrics: cfgMetrics,
+			Metrics:        cfgMetrics,
+			CronExpression: "42 3 * * *",
 		}
 	})
 	Context("NewPromCollector", func() {
@@ -133,6 +134,7 @@ var _ = Describe("metrics", func() {
 					"prefix":        cfg.Metrics.Prefix,
 					"reportHistory": strconv.Itoa(cfg.ReportHistory),
 					"version":       version.Version,
+					"cron":          cfg.CronExpression,
 				},
 				"1",
 			)