Check for connectivity to memcached.

This will attempt to call the daemon's stats command which, if broken, might
hung and cause nrpe to time out.  We want that, as it will give us a clue to
what might be causing some other app to fail.

roles/nagios_client/files/scripts/check_memcache_connect

@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# 2014-12-19
+# Author: Ralph Bean <rbean@redhat.com>
+
+# exit codes
+ok=0
+warn=1
+crit=2
+unkn=3
+
+# Right now we just check to see if we can even run this command without
+# hanging and timing out.  In the future, we could parse stdout for more
+# fine-grained information.
+echo stats | nc 127.0.0.1 11211 > /dev/null
+status=$?
+
+if [ $status -ne 0 ]; then
+    echo "CRIT:  stats command got status code $status"
+    exit $crit
+else
+    echo "OK:  stats command got status code $status"
+    exit $ok
+fi