journal hostname label

templates/config.alloy.erb

@@ -44,6 +44,11 @@ loki.source.file "system_logs" {
 loki.relabel "add_labels" {
   forward_to = [loki.write.loki.receiver]
 
+  rule {
+    action        = "replace"
+    source_labels = ["__hostname"]
+    target_label  = "hostname"
+  }
     rule {
     action       = "replace"
     target_label = "job"