Update hostname remotely (#18)

Author: Vasilis

config/config.go

@@ -488,7 +488,14 @@ func readRemoteList(
 		logger.Warn("Region name not provided in config file")
 	}
 
-	glRC.HostName, _ = GetHostname(logger)
+	glRC.HostName = strings.ToLower(c.Local.HostName)
+	if glRC.HostName == "" {
+		logger.Debug("Hostname not provided in config file")
+		glRC.HostName, _ = GetHostname(logger)
+	} else {
+		logger.Info("Remotely assigned hostname for metrics uploading",
+			zap.String("metrics_hostname", glRC.HostName))
+	}
 
 	glRC.InterfaceName = strings.ToLower(c.Local.InterfaceName)
 	switch {

example_run_arachne_test.go

@@ -26,7 +26,7 @@ import (
 	"github.com/uber/arachne/metrics"
 )
 
-func ExampleRunArachne() {
+func ExampleRun() {
 
 	mc := new(metrics.StatsdConfiger)