resources/mongrel_cluster in mongrel_cluster-0.2.0 vs resources/mongrel_cluster in mongrel_cluster-0.2.1

@@ -10,9 +10,16 @@
 #              
 
 CONF_DIR=/etc/mongrel_cluster
 RETVAL=0
 
+
+# Gracefully exit if the controller is missing.
+which mongrel_cluster_ctl >/dev/null || exit 0
+
+# Go no further if config directory is missing.
+[ -d "$CONF_DIR" ] || exit 0
+
 case "$1" in
     start)
       mongrel_cluster_ctl start -c $CONF_DIR
       RETVAL=$?
   ;;
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