Fix metrics

observer/monitor.go

@@ -12,6 +12,7 @@ import (
 // describing a given oberver monitor
 type monitor struct {
 	name   string
+	valid  bool
 	period time.Duration
 	probe  string
 	prober p.Prober
@@ -50,6 +51,7 @@ func (m monitor) start() *time.Ticker {
 
 func (m monitor) New(c MonConf, log blog.Logger, prom prometheus.Registerer) *monitor {
 	m.name = c.getName()
+	m.valid = c.Valid
 	m.period = c.Period.Duration
 	m.probe = c.Probe
 	m.prober = c.getProber()

observer/observer.go

@@ -1,6 +1,8 @@
 package observer
 
 import (
+	"strconv"
+
 	blog "github.com/letsencrypt/boulder/log"
 	// _ are probes imported to trigger init func
 	_ "github.com/letsencrypt/boulder/observer/probes/dns"
@@ -42,9 +44,12 @@ func (o Observer) Start() {
 
 	// start each monitor
 	for _, mon := range o.Monitors {
-		statTotalMonitors.WithLabelValues(mon.probe, mon.name).Inc()
-		// TODO(@beautifulentropy): track and restart unhealthy goroutines
-		go mon.start()
+		if mon.valid {
+			// TODO(@beautifulentropy): track and restart unhealthy goroutines
+			go mon.start()
+		}
+		statTotalMonitors.WithLabelValues(
+			mon.name, mon.probe, strconv.FormatBool(mon.valid)).Inc()
 	}
 	// run forever
 	select {}
@@ -54,10 +59,8 @@ func (o Observer) Start() {
 func New(c ObsConf, l blog.Logger, p prometheus.Registerer) *Observer {
 	var monitors []*monitor
 	for _, monConf := range c.MonConfs {
-		if monConf.Valid {
-			var mon monitor
-			monitors = append(monitors, mon.New(*monConf, l, p))
-		}
+		var mon monitor
+		monitors = append(monitors, mon.New(*monConf, l, p))
 	}
 	return &Observer{l, p, monitors}
 }