revert hostname label

templates/config.alloy.erb

@@ -31,6 +31,12 @@ loki.process "parse_hostname" {
       }
     }
   }
+  // Fallback: Set hostname explicitly if not parsed
+  stage.static_labels {
+    values = {
+      hostname_fallback = system.hostname,  // e.g., fm002
+    }
+  }
 }
 
 // Refine labels
@@ -50,11 +56,11 @@ loki.relabel "add_labels" {
     source_labels = ["hostname"]
     target_label  = "hostname"
   }
-  //rule {
-  //  source_labels = ["hostname_fallback"]
-  //  target_label  = "hostname"
-  //  action        = "replace"
-  //  replacement   = "${__label:hostname_fallback}"  // Only if hostname is unset
+  rule {
+    source_labels = ["hostname_fallback"]
+    target_label  = "hostname"
+    action        = "replace"
+    replacement   = "${__label:hostname_fallback}"  // Only if hostname is unset
   }
 }