source hostname label

templates/config.alloy.erb

@@ -12,11 +12,11 @@ local.file_match "system_logs" {
 
 loki.process "syslog" {
   stage.regex {
-    expression = `(?P[A-Z][a-z][a-z]\\s{1,2}\\d{1,2}\\s\\d{2}[:]\\d{2}[:]\\d{2})\\s(?P[\\w][\\w\\d\\.@-]*)\\s(?P.*)$`
+    expression = `(?P<ts>[A-Z][a-z]{2}\s{1,2}\d{1,2}\s\d{2}:\d{2}:\d{2})\s(?P<host>[\w\.\@-]+)\s(?P<log>.*)$`
   }
   stage.labels {
     values = {
-      hostname = "host"
+      hostname = "${host}"
     }
   }
   stage.timestamp {
@@ -29,6 +29,7 @@ loki.process "syslog" {
   forward_to = [loki.write.loki.receiver]
 }
 
+
 loki.write "loki" {
   endpoint {
     url = "<%= @ay_loki_url %>"