<NME> groktest.conf
<BEF> ADDFILE
<MSG> add example groktest config

<DFF> @@ -0,0 +1,20 @@
+# Useful config for testing grok expressions (update "pattern" below)
+
+input {
+  stdin {
+    type => test
+  }
+}
+
+filter {
+  grok {
+    type => "test"
+    pattern => "%{SYSLOGLINE}"
+  }
+}
+
+output {
+  stdout {
+    debug => true
+  }
+}

add example groktest config