syslog-ng config, stricter RFC5424 format for Promtail

syslog-ng/syslog-ng.conf

@@ -18,25 +18,23 @@ source s_local {
 };
 
 source s_network {
-	default-network-drivers(
-		# NOTE: TLS support
-		#
-		# the default-network-drivers() source driver opens the TLS
-		# enabled ports as well, however without an actual key/cert
-		# pair they will not operate and syslog-ng would display a
-		# warning at startup.
-		#
-		#tls(key-file("/path/to/ssl-private-key") cert-file("/path/to/ssl-cert"))
-	);
+	default-network-drivers();
+};
+
+# Force every message into the standard RFC5424 format that Promtail expects.
+template t_promtail_rfc5424 {
+    template("<${PRI}>1 ${ISODATE} ${HOST} ${PROGRAM} ${PID} ${MSGID} - ${MSG}\\n");
 };
 
 destination d_loki {
-	syslog("promtail" transport("tcp") port("1514"));
+	syslog("promtail" transport("tcp") port("1514")
+    # APPLY THE TEMPLATE TO THE DESTINATION
+    template(t_promtail_rfc5424)
+  );
 };
 
 log {
-        source(s_local);
-        source(s_network);
-        destination(d_loki);
-};
-
+    source(s_local);
+    source(s_network);
+    destination(d_loki);
+};