From ff15b64e9f51357afba0576a2a7eaa6fb3808fe1 Mon Sep 17 00:00:00 2001
From: Cody Soyland <cody@soyland.org>
Date: Mon, 7 Apr 2014 12:44:41 -0500
Subject: [PATCH] Make it work if the etcd is empty

---
 core/etcd.go | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/core/etcd.go b/core/etcd.go
index d1387f3b3..adb0b9c13 100644
--- a/core/etcd.go
+++ b/core/etcd.go
@@ -22,9 +22,18 @@ type TopologyMapper struct {
 
 func (self *TopologyMapper) Run() {
 	log.Println(self.namespace + "/db")
-	resp, err := self.service.Etcd.Get(self.namespace+"/db", false, true)
+	db_path := self.namespace + "/db"
+	resp, err := self.service.Etcd.Get(db_path, false, true)
 	if err != nil {
-		log.Fatal(err)
+		ee, ok := err.(*etcd.EtcdError)
+		if ok && ee.ErrorCode == 100 { // node does not exist
+			resp, err = self.service.Etcd.CreateDir(db_path, 0)
+			if err != nil {
+				log.Fatal(err)
+			}
+		} else {
+			log.Fatal(err)
+		}
 	}
 	for _, node := range flatten(resp.Node) {
 		err := self.handlenode(node)