Add support for providing tracing headers (ava-labs#1727)

config/config.go

@@ -1265,7 +1265,7 @@ func getTraceConfig(v *viper.Viper) (trace.Config, error) {
 			Type:     exporterType,
 			Endpoint: endpoint,
 			Insecure: v.GetBool(TracingInsecureKey),
-			// TODO add support for headers
+			Headers:  v.GetStringMapString(TracingHeadersKey),
 		},
 		Enabled:         true,
 		TraceSampleRate: v.GetFloat64(TracingSampleRateKey),

config/flags.go

@@ -386,6 +386,7 @@ func addNodeFlags(fs *pflag.FlagSet) {
 	fs.String(TracingEndpointKey, "localhost:4317", "The endpoint to send trace data to")
 	fs.Bool(TracingInsecureKey, true, "If true, don't use TLS when sending trace data")
 	fs.Float64(TracingSampleRateKey, 0.1, "The fraction of traces to sample. If >= 1, always sample. If <= 0, never sample")
+	fs.StringToString(TracingHeadersKey, map[string]string{}, "The headers to provide the trace indexer")
 	// TODO add flag to take in headers to send from exporter
 }
 

config/keys.go

@@ -218,4 +218,5 @@ const (
 	TracingInsecureKey                                 = "tracing-insecure"
 	TracingSampleRateKey                               = "tracing-sample-rate"
 	TracingExporterTypeKey                             = "tracing-exporter-type"
+	TracingHeadersKey                                  = "tracing-headers"
 )