root / lib / ssconf.py @ 06dc5b44
History | View | Annotate | Download (3.7 kB)
1 | 2f31098c | Iustin Pop | #
|
---|---|---|---|
2 | a8083063 | Iustin Pop | #
|
3 | a8083063 | Iustin Pop | |
4 | 856c67e1 | Michael Hanselmann | # Copyright (C) 2006, 2007, 2008 Google Inc.
|
5 | a8083063 | Iustin Pop | #
|
6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
|
7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
|
8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
|
9 | a8083063 | Iustin Pop | # (at your option) any later version.
|
10 | a8083063 | Iustin Pop | #
|
11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
|
12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | a8083063 | Iustin Pop | # General Public License for more details.
|
15 | a8083063 | Iustin Pop | #
|
16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
|
17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
|
18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 | a8083063 | Iustin Pop | # 02110-1301, USA.
|
20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Global Configuration data for Ganeti.
|
23 | a8083063 | Iustin Pop |
|
24 | a8083063 | Iustin Pop | This module provides the interface to a special case of cluster
|
25 | a8083063 | Iustin Pop | configuration data, which is mostly static and available to all nodes.
|
26 | a8083063 | Iustin Pop |
|
27 | a8083063 | Iustin Pop | """
|
28 | a8083063 | Iustin Pop | |
29 | a8083063 | Iustin Pop | import socket |
30 | 5675cd1f | Iustin Pop | import sys |
31 | a8083063 | Iustin Pop | |
32 | a8083063 | Iustin Pop | from ganeti import errors |
33 | a8083063 | Iustin Pop | from ganeti import constants |
34 | 41a57aab | Michael Hanselmann | from ganeti import utils |
35 | 856c67e1 | Michael Hanselmann | from ganeti import serializer |
36 | a8083063 | Iustin Pop | |
37 | a8083063 | Iustin Pop | |
38 | 856c67e1 | Michael Hanselmann | class SimpleConfigReader: |
39 | 856c67e1 | Michael Hanselmann | """Simple class to read configuration file.
|
40 | 856c67e1 | Michael Hanselmann |
|
41 | 856c67e1 | Michael Hanselmann | """
|
42 | 856c67e1 | Michael Hanselmann | def __init__(self, file_name=constants.CLUSTER_CONF_FILE): |
43 | 856c67e1 | Michael Hanselmann | """Initializes this class.
|
44 | 856c67e1 | Michael Hanselmann |
|
45 | 856c67e1 | Michael Hanselmann | @type file_name: string
|
46 | 856c67e1 | Michael Hanselmann | @param file_name: Configuration file path
|
47 | 856c67e1 | Michael Hanselmann |
|
48 | 856c67e1 | Michael Hanselmann | """
|
49 | 856c67e1 | Michael Hanselmann | self._file_name = file_name
|
50 | 856c67e1 | Michael Hanselmann | self._config_data = serializer.Load(utils.ReadFile(file_name))
|
51 | 856c67e1 | Michael Hanselmann | # TODO: Error handling
|
52 | 856c67e1 | Michael Hanselmann | |
53 | 856c67e1 | Michael Hanselmann | def GetClusterName(self): |
54 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["cluster_name"] |
55 | 856c67e1 | Michael Hanselmann | |
56 | 856c67e1 | Michael Hanselmann | def GetHostKey(self): |
57 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["rsahostkeypub"] |
58 | 856c67e1 | Michael Hanselmann | |
59 | 856c67e1 | Michael Hanselmann | def GetMasterNode(self): |
60 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["master_node"] |
61 | 856c67e1 | Michael Hanselmann | |
62 | 856c67e1 | Michael Hanselmann | def GetMasterIP(self): |
63 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["master_ip"] |
64 | 856c67e1 | Michael Hanselmann | |
65 | 856c67e1 | Michael Hanselmann | def GetMasterNetdev(self): |
66 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["master_netdev"] |
67 | 856c67e1 | Michael Hanselmann | |
68 | 856c67e1 | Michael Hanselmann | def GetFileStorageDir(self): |
69 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["file_storage_dir"] |
70 | 856c67e1 | Michael Hanselmann | |
71 | 856c67e1 | Michael Hanselmann | def GetHypervisorType(self): |
72 | 856c67e1 | Michael Hanselmann | return self._config_data["cluster"]["hypervisor"] |
73 | 856c67e1 | Michael Hanselmann | |
74 | 856c67e1 | Michael Hanselmann | def GetNodeList(self): |
75 | 856c67e1 | Michael Hanselmann | return self._config_data["nodes"].keys() |
76 | 856c67e1 | Michael Hanselmann | |
77 | 856c67e1 | Michael Hanselmann | |
78 | 856c67e1 | Michael Hanselmann | class SimpleConfigWriter(SimpleConfigReader): |
79 | 856c67e1 | Michael Hanselmann | """Simple class to write configuration file.
|
80 | 856c67e1 | Michael Hanselmann |
|
81 | 856c67e1 | Michael Hanselmann | """
|
82 | 856c67e1 | Michael Hanselmann | def SetMasterNode(self, node): |
83 | 856c67e1 | Michael Hanselmann | """Change master node.
|
84 | 856c67e1 | Michael Hanselmann |
|
85 | 856c67e1 | Michael Hanselmann | """
|
86 | 856c67e1 | Michael Hanselmann | self._config_data["cluster"]["master_node"] = node |
87 | 856c67e1 | Michael Hanselmann | |
88 | 856c67e1 | Michael Hanselmann | def Save(self): |
89 | 856c67e1 | Michael Hanselmann | """Writes configuration file.
|
90 | 856c67e1 | Michael Hanselmann |
|
91 | 856c67e1 | Michael Hanselmann | Warning: Doesn't take care of locking or synchronizing with other
|
92 | 856c67e1 | Michael Hanselmann | processes.
|
93 | 856c67e1 | Michael Hanselmann |
|
94 | 856c67e1 | Michael Hanselmann | """
|
95 | 856c67e1 | Michael Hanselmann | utils.WriteFile(self._file_name,
|
96 | 856c67e1 | Michael Hanselmann | data=serializer.Dump(self._config_data),
|
97 | 856c67e1 | Michael Hanselmann | mode=0600)
|
98 | 856c67e1 | Michael Hanselmann | |
99 | 856c67e1 | Michael Hanselmann | |
100 | b33e986b | Iustin Pop | def GetMasterAndMyself(ss=None): |
101 | b33e986b | Iustin Pop | """Get the master node and my own hostname.
|
102 | b33e986b | Iustin Pop |
|
103 | b33e986b | Iustin Pop | This can be either used for a 'soft' check (compared to CheckMaster,
|
104 | b33e986b | Iustin Pop | which exits) or just for computing both at the same time.
|
105 | b33e986b | Iustin Pop |
|
106 | b33e986b | Iustin Pop | The function does not handle any errors, these should be handled in
|
107 | b33e986b | Iustin Pop | the caller (errors.ConfigurationError, errors.ResolverError).
|
108 | b33e986b | Iustin Pop |
|
109 | b33e986b | Iustin Pop | """
|
110 | b33e986b | Iustin Pop | if ss is None: |
111 | 06dc5b44 | Iustin Pop | ss = SimpleConfigReader() |
112 | b33e986b | Iustin Pop | return ss.GetMasterNode(), utils.HostInfo().name
|
113 | b33e986b | Iustin Pop | |
114 | 06dc5b44 | Iustin Pop | |
115 | b33e986b | Iustin Pop | def CheckMaster(debug, ss=None): |
116 | 5675cd1f | Iustin Pop | """Checks the node setup.
|
117 | 5675cd1f | Iustin Pop |
|
118 | 5675cd1f | Iustin Pop | If this is the master, the function will return. Otherwise it will
|
119 | 5675cd1f | Iustin Pop | exit with an exit code based on the node status.
|
120 | 5675cd1f | Iustin Pop |
|
121 | 5675cd1f | Iustin Pop | """
|
122 | 5675cd1f | Iustin Pop | try:
|
123 | b33e986b | Iustin Pop | master_name, myself = GetMasterAndMyself(ss) |
124 | 5675cd1f | Iustin Pop | except errors.ConfigurationError, err:
|
125 | 5675cd1f | Iustin Pop | print "Cluster configuration incomplete: '%s'" % str(err) |
126 | 5675cd1f | Iustin Pop | sys.exit(constants.EXIT_NODESETUP_ERROR) |
127 | 5675cd1f | Iustin Pop | except errors.ResolverError, err:
|
128 | 5675cd1f | Iustin Pop | sys.stderr.write("Cannot resolve my own name (%s)\n" % err.args[0]) |
129 | 5675cd1f | Iustin Pop | sys.exit(constants.EXIT_NODESETUP_ERROR) |
130 | 5675cd1f | Iustin Pop | |
131 | b33e986b | Iustin Pop | if myself != master_name:
|
132 | 5675cd1f | Iustin Pop | if debug:
|
133 | 5675cd1f | Iustin Pop | sys.stderr.write("Not master, exiting.\n")
|
134 | 5675cd1f | Iustin Pop | sys.exit(constants.EXIT_NOTMASTER) |