collectors: disable the HTLC monitor collector

multi: add a toggle to disable the HTLC monitor collector

collectors/prometheus.go

@@ -67,6 +67,9 @@ type MonitoringConfig struct {
 
 	// DisableGraph disables collection of graph metrics
 	DisableGraph bool
+
+	// DisableHtlc disables collection of HTLCs metrics
+	DisableHtlc bool
 }
 
 func DefaultConfig() *PrometheusConfig {
@@ -101,9 +104,12 @@ func NewPrometheusExporter(cfg *PrometheusConfig, lnd *lndclient.LndServices,
 			NewPeerCollector(lnd.Client, errChan),
 			NewInfoCollector(lnd.Client, errChan),
 		},
-		htlcMonitor.collectors()...,
 	)
 
+	if !monitoringCfg.DisableHtlc {
+		collectors = append(collectors, htlcMonitor.collectors()...)
+	}
+
 	if !monitoringCfg.DisableGraph {
 		collectors = append(collectors, NewGraphCollector(lnd.Client, errChan))
 	}

config.go

@@ -49,8 +49,11 @@ type config struct {
 	// PrimaryNode is the pubkey of the primary node in primary-gateway setups.
 	PrimaryNode string `long:"primarynode" description:"Public key of the primary node in a primary-gateway setup"`
 
-	// DisableGraph disables collection of graph metrics
+	// DisableGraph disables collection of graph metrics.
 	DisableGraph bool `long:"disablegraph" description:"Do not collect graph metrics"`
+
+	// DisableHtlc disables the collection of HTLCs metrics.
+	DisableHtlc bool `long:"disablehtlc" description:"Do not collect HTLCs metrics"`
 }
 
 var defaultConfig = config{

lndmon.go

@@ -59,6 +59,7 @@ func start() error {
 
 	monitoringCfg := collectors.MonitoringConfig{
 		DisableGraph: cfg.DisableGraph,
+		DisableHtlc:  cfg.DisableHtlc,
 	}
 	if cfg.PrimaryNode != "" {
 		primaryNode, err := route.NewVertexFromStr(cfg.PrimaryNode)