From 856c67e1bdac29ee07ae066469088934f376f38c Mon Sep 17 00:00:00 2001
From: Michael Hanselmann <hansmi@google.com>
Date: Wed, 1 Oct 2008 17:33:18 +0000
Subject: [PATCH] Add simple configuration reader/writer classes
This will be used to read the configuration file in the node daemon.
The write functionality is needed for master failover.
Reviewed-by: iustinp
---
lib/ssconf.py | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 64 insertions(+), 1 deletion(-)
diff --git a/lib/ssconf.py b/lib/ssconf.py
index fbe2fb15a..cbd26e2c8 100644
--- a/lib/ssconf.py
+++ b/lib/ssconf.py
@@ -1,7 +1,7 @@
#
#
-# Copyright (C) 2006, 2007 Google Inc.
+# Copyright (C) 2006, 2007, 2008 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -32,6 +32,7 @@ import sys
from ganeti import errors
from ganeti import constants
from ganeti import utils
+from ganeti import serializer
class SimpleStore:
@@ -201,6 +202,68 @@ class WritableSimpleStore(SimpleStore):
uid=0, gid=0, mode=0400)
+class SimpleConfigReader:
+ """Simple class to read configuration file.
+
+ """
+ def __init__(self, file_name=constants.CLUSTER_CONF_FILE):
+ """Initializes this class.
+
+ @type file_name: string
+ @param file_name: Configuration file path
+
+ """
+ self._file_name = file_name
+ self._config_data = serializer.Load(utils.ReadFile(file_name))
+ # TODO: Error handling
+
+ def GetClusterName(self):
+ return self._config_data["cluster"]["cluster_name"]
+
+ def GetHostKey(self):
+ return self._config_data["cluster"]["rsahostkeypub"]
+
+ def GetMasterNode(self):
+ return self._config_data["cluster"]["master_node"]
+
+ def GetMasterIP(self):
+ return self._config_data["cluster"]["master_ip"]
+
+ def GetMasterNetdev(self):
+ return self._config_data["cluster"]["master_netdev"]
+
+ def GetFileStorageDir(self):
+ return self._config_data["cluster"]["file_storage_dir"]
+
+ def GetHypervisorType(self):
+ return self._config_data["cluster"]["hypervisor"]
+
+ def GetNodeList(self):
+ return self._config_data["nodes"].keys()
+
+
+class SimpleConfigWriter(SimpleConfigReader):
+ """Simple class to write configuration file.
+
+ """
+ def SetMasterNode(self, node):
+ """Change master node.
+
+ """
+ self._config_data["cluster"]["master_node"] = node
+
+ def Save(self):
+ """Writes configuration file.
+
+ Warning: Doesn't take care of locking or synchronizing with other
+ processes.
+
+ """
+ utils.WriteFile(self._file_name,
+ data=serializer.Dump(self._config_data),
+ mode=0600)
+
+
def GetMasterAndMyself(ss=None):
"""Get the master node and my own hostname.
--
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