diff --git a/cmd/arouter/arouter.go b/cmd/arouter/arouter.go
index abea7b0..d3838ac 100644
--- a/cmd/arouter/arouter.go
+++ b/cmd/arouter/arouter.go
@@ -36,7 +36,7 @@
 	}
 
 	// Setup logging
-	if _, err := log.SetDefaultLogger(log.JSON, *conf.LogLevel, nil); err != nil {
+	if _, err := log.SetDefaultLogger(log.JSON, *conf.LogLevel, log.Fields{"instanceId": conf.InstanceID}); err != nil {
 		log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
 	}
 
diff --git a/cmd/arouterd/arouterd.go b/cmd/arouterd/arouterd.go
index 2c6b31e..1c9cd80 100644
--- a/cmd/arouterd/arouterd.go
+++ b/cmd/arouterd/arouterd.go
@@ -82,6 +82,8 @@
 	kafkaHost       = getStrEnv("KAFKA_HOST", "kafka")
 	kafkaPort       = getIntEnv("KAFKA_PORT", 0, math.MaxUint16, 9092)
 	kafkaInstanceID = getStrEnv("KAFKA_INSTANCE_ID", "arouterd")
+
+	instanceID = getStrEnv("HOSTNAME", "arouterd001")
 )
 
 func getIntEnv(key string, min, max, defaultValue int) int {
@@ -411,7 +413,7 @@
 	}
 
 	// Set up logging
-	if _, err := log.SetDefaultLogger(log.JSON, 0, nil); err != nil {
+	if _, err := log.SetDefaultLogger(log.JSON, 0, log.Fields{"instanceId": instanceID}); err != nil {
 		log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
 	}