revert hostname label

templates/config.alloy.erb

@@ -16,51 +16,23 @@ loki.source.file "system_logs" {
   forward_to = [loki.relabel.add_labels.receiver]
 }
 
-// Parse hostname from log lines (if structured)
-loki.process "parse_hostname" {
+// Add hostname as a label explicitly
+loki.process "add_hostname" {
   forward_to = [loki.relabel.add_labels.receiver]
-  stage.match {
-    selector = "{filename=~\"/var/log/.*\"}"
-    stage.regex {
-      expression = "^(?P<timestamp>[^ ]+ [^ ]+) (?P<hostname>[^ ]+) .*"
-      source     = "__content__"
-    }
-    stage.labels {
-      values = {
-        hostname = "hostname",  // Extracted from log line
-      }
-    }
-  }
-  // Fallback: Set hostname explicitly if not parsed
   stage.static_labels {
     values = {
-      hostname_fallback = system.hostname,  // e.g., fm002
+      hostname = env("HOSTNAME"),  // Pulls from $HOSTNAME, defaults to "unknown-host"
     }
   }
 }
 
-// Refine labels
+// Add hostname and job labels
 loki.relabel "add_labels" {
   forward_to = [loki.write.loki.receiver]
   rule {
     action       = "replace"
     target_label = "job"
-    replacement  = "syslogs"
-  }
-  rule {
-    source_labels = ["__path__"]
-    target_label  = "filename"
-  }
-  // Prefer parsed hostname, fallback to system.hostname
-  rule {
-    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
+    replacement  = "syslogs"  // Or any name you prefer, e.g., "syslogs"
   }
 }