Added util scripts to back up and restore data from etcd

utils/etcd_dump.py

+import etcd
+import json
+import sys
+
+etcd = etcd.Etcd("158.38.213.3", 4001, ssl_cert="etcd_client.crt", ssl_key="etcd_client.key", verify="etcd_ca.crt")
+
+def dump_subtree(etcd, tree, dump):
+    for entry in etcd.list(tree):
+        if entry.dir:
+            dump_subtree(etcd, entry.key, dump)
+        else:
+            dump[entry.key] = entry.value
+data = {}
+dump_subtree(etcd, "/nova", data)
+json.dump(data, sys.stdout)

utils/etcd_restore.py

+import etcd
+import json
+import sys
+
+etcd = etcd.Etcd("158.38.213.2", 4001, ssl_cert="etcd_client.crt", ssl_key="etcd_client.key", verify="etcd_ca.crt")
+
+data = json.load(sys.stdin)
+for key, value in data.items():
+    etcd.set(key, value)