add hostname label

templates/config.alloy.erb

@@ -16,23 +16,20 @@ loki.source.file "system_logs" {
   forward_to = [loki.relabel.add_labels.receiver]
 }
 
-// Add hostname as a label explicitly
-loki.process "add_hostname" {
-  forward_to = [loki.relabel.add_labels.receiver]
-  stage.static_labels {
-    values = {
-      hostname = env("HOSTNAME"),  // Pulls from $HOSTNAME, defaults to "unknown-host"
-    }
-  }
-}
-
-// Add hostname and job labels
+// Relabel logs to add hostname and job labels
 loki.relabel "add_labels" {
   forward_to = [loki.write.loki.receiver]
+
+  rule {
+    action       = "replace"
+    source_labels = ["__host__"]
+    target_label = "hostname"
+  }
+
   rule {
     action       = "replace"
     target_label = "job"
-    replacement  = "syslogs"  // Or any name you prefer, e.g., "syslogs"
+    replacement  = "syslogs"
   }
 }