Export last run duration metric

cmd/pint/metrics.go

@@ -29,6 +29,12 @@ var (
 			Help: "Last checks run completion time since unix epoch in seconds",
 		},
 	)
+	lastRunDuration = prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Name: "pint_last_run_duration_seconds",
+			Help: "Last checks run duration in seconds",
+		},
+	)
 	rulesParsedTotal = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
 			Name: "pint_rules_parsed_total",

cmd/pint/scan.go

@@ -38,6 +38,11 @@ func tryDecodingYamlError(e string) (int, string) {
 }
 
 func checkRules(ctx context.Context, workers int, cfg config.Config, entries []discovery.Entry) (summary reporter.Summary) {
+	start := time.Now()
+	defer func() {
+		lastRunDuration.Set(time.Since(start).Seconds())
+	}()
+
 	jobs := make(chan scanJob, workers*5)
 	results := make(chan reporter.Report, workers*5)
 	wg := sync.WaitGroup{}

cmd/pint/tests/0042_watch_metrics.txt

@@ -286,6 +286,9 @@ pint_check_duration_seconds_count{check="promql/syntax"}
 # HELP pint_check_iterations_total Total number of completed check iterations since pint start
 # TYPE pint_check_iterations_total counter
 pint_check_iterations_total
+# HELP pint_last_run_duration_seconds Last checks run duration in seconds
+# TYPE pint_last_run_duration_seconds gauge
+pint_last_run_duration_seconds
 # HELP pint_last_run_time_seconds Last checks run completion time since unix epoch in seconds
 # TYPE pint_last_run_time_seconds gauge
 pint_last_run_time_seconds

cmd/pint/tests/0054_watch_metrics_prometheus.txt

@@ -63,6 +63,9 @@ pint_check_duration_seconds_count{check="promql/vector_matching"}
 # HELP pint_check_iterations_total Total number of completed check iterations since pint start
 # TYPE pint_check_iterations_total counter
 pint_check_iterations_total
+# HELP pint_last_run_duration_seconds Last checks run duration in seconds
+# TYPE pint_last_run_duration_seconds gauge
+pint_last_run_duration_seconds
 # HELP pint_last_run_time_seconds Last checks run completion time since unix epoch in seconds
 # TYPE pint_last_run_time_seconds gauge
 pint_last_run_time_seconds

cmd/pint/tests/0057_watch_metrics_prometheus_ignore.txt

@@ -61,6 +61,9 @@ pint_check_duration_seconds_count{check="promql/vector_matching"}
 # HELP pint_check_iterations_total Total number of completed check iterations since pint start
 # TYPE pint_check_iterations_total counter
 pint_check_iterations_total
+# HELP pint_last_run_duration_seconds Last checks run duration in seconds
+# TYPE pint_last_run_duration_seconds gauge
+pint_last_run_duration_seconds
 # HELP pint_last_run_time_seconds Last checks run completion time since unix epoch in seconds
 # TYPE pint_last_run_time_seconds gauge
 pint_last_run_time_seconds

cmd/pint/watch.go

@@ -114,6 +114,7 @@ func actionWatch(c *cli.Context) error {
 	prometheus.MustRegister(checkIterationsTotal)
 	prometheus.MustRegister(pintVersion)
 	prometheus.MustRegister(lastRunTime)
+	prometheus.MustRegister(lastRunDuration)
 	prometheus.MustRegister(rulesParsedTotal)
 	promapi.RegisterMetrics()
 

docs/changelog.md

@@ -2,6 +2,10 @@
 
 ## v0.17.5
 
+### Added
+
+- Added `pint_last_run_duration_seconds` metric.
+
 ### Fixed
 
 - Better handling of YAML unmarshal errors.