metrics: allow changing influxdb interval (#33767)

The PR exposes the InfuxDB reporting interval as a CLI parameter, which
was previously fixed 10s. Default is still kept at 10s.
Note that decreasing the interval comes with notable extra traffic and
load on InfluxDB.

cmd/geth/chaincmd.go

@@ -111,6 +111,7 @@ if one is set.  Otherwise it prints the genesis from the datadir.`,
 			utils.MetricsInfluxDBUsernameFlag,
 			utils.MetricsInfluxDBPasswordFlag,
 			utils.MetricsInfluxDBTagsFlag,
+			utils.MetricsInfluxDBIntervalFlag,
 			utils.MetricsInfluxDBTokenFlag,
 			utils.MetricsInfluxDBBucketFlag,
 			utils.MetricsInfluxDBOrganizationFlag,

cmd/geth/config.go

@@ -377,6 +377,9 @@ func applyMetricConfig(ctx *cli.Context, cfg *gethConfig) {
 	if ctx.IsSet(utils.MetricsInfluxDBTagsFlag.Name) {
 		cfg.Metrics.InfluxDBTags = ctx.String(utils.MetricsInfluxDBTagsFlag.Name)
 	}
+	if ctx.IsSet(utils.MetricsInfluxDBIntervalFlag.Name) {
+		cfg.Metrics.InfluxDBInterval = ctx.Duration(utils.MetricsInfluxDBIntervalFlag.Name)
+	}
 	if ctx.IsSet(utils.MetricsEnableInfluxDBV2Flag.Name) {
 		cfg.Metrics.EnableInfluxDBV2 = ctx.Bool(utils.MetricsEnableInfluxDBV2Flag.Name)
 	}

cmd/geth/main.go

@@ -216,6 +216,7 @@ var (
 		utils.MetricsInfluxDBUsernameFlag,
 		utils.MetricsInfluxDBPasswordFlag,
 		utils.MetricsInfluxDBTagsFlag,
+		utils.MetricsInfluxDBIntervalFlag,
 		utils.MetricsEnableInfluxDBV2Flag,
 		utils.MetricsInfluxDBTokenFlag,
 		utils.MetricsInfluxDBBucketFlag,

cmd/utils/flags.go

@@ -1016,6 +1016,13 @@ Please note that --` + MetricsHTTPFlag.Name + ` must be set to start the server.
 		Category: flags.MetricsCategory,
 	}
 
+	MetricsInfluxDBIntervalFlag = &cli.DurationFlag{
+		Name:     "metrics.influxdb.interval",
+		Usage:    "Interval between metrics reports to InfluxDB (with time unit, e.g. 10s)",
+		Value:    metrics.DefaultConfig.InfluxDBInterval,
+		Category: flags.MetricsCategory,
+	}
+
 	MetricsEnableInfluxDBV2Flag = &cli.BoolFlag{
 		Name:     "metrics.influxdbv2",
 		Usage:    "Enable metrics export/push to an external InfluxDB v2 database",
@@ -2246,13 +2253,14 @@ func SetupMetrics(cfg *metrics.Config) {
 		bucket       = cfg.InfluxDBBucket
 		organization = cfg.InfluxDBOrganization
 		tagsMap      = SplitTagsFlag(cfg.InfluxDBTags)
+		interval     = cfg.InfluxDBInterval
 	)
 	if enableExport {
-		log.Info("Enabling metrics export to InfluxDB")
-		go influxdb.InfluxDBWithTags(metrics.DefaultRegistry, 10*time.Second, endpoint, database, username, password, "geth.", tagsMap)
+		log.Info("Enabling metrics export to InfluxDB", "interval", interval)
+		go influxdb.InfluxDBWithTags(metrics.DefaultRegistry, interval, endpoint, database, username, password, "geth.", tagsMap)
 	} else if enableExportV2 {
-		log.Info("Enabling metrics export to InfluxDB (v2)")
-		go influxdb.InfluxDBV2WithTags(metrics.DefaultRegistry, 10*time.Second, endpoint, token, bucket, organization, "geth.", tagsMap)
+		log.Info("Enabling metrics export to InfluxDB (v2)", "interval", interval)
+		go influxdb.InfluxDBV2WithTags(metrics.DefaultRegistry, interval, endpoint, token, bucket, organization, "geth.", tagsMap)
 	}
 
 	// Expvar exporter.

metrics/config.go

@@ -16,6 +16,8 @@
 
 package metrics
 
+import "time"
+
 // Config contains the configuration for the metric collection.
 type Config struct {
 	Enabled          bool          `toml:",omitempty"`
@@ -28,6 +30,7 @@ type Config struct {
 	InfluxDBUsername string        `toml:",omitempty"`
 	InfluxDBPassword string        `toml:",omitempty"`
 	InfluxDBTags     string        `toml:",omitempty"`
+	InfluxDBInterval time.Duration `toml:",omitempty"`
 
 	EnableInfluxDBV2     bool   `toml:",omitempty"`
 	InfluxDBToken        string `toml:",omitempty"`
@@ -47,6 +50,7 @@ var DefaultConfig = Config{
 	InfluxDBUsername: "test",
 	InfluxDBPassword: "test",
 	InfluxDBTags:     "host=localhost",
+	InfluxDBInterval: 10 * time.Second,
 
 	// influxdbv2-specific flags
 	EnableInfluxDBV2:     false,