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1 | 0006af7d | Michael Hanselmann | #!/usr/bin/python |
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2 | 0006af7d | Michael Hanselmann | # |
3 | 0006af7d | Michael Hanselmann | |
4 | 0006af7d | Michael Hanselmann | # Copyright (C) 2007 Google Inc. |
5 | 0006af7d | Michael Hanselmann | # |
6 | 0006af7d | Michael Hanselmann | # This program is free software; you can redistribute it and/or modify |
7 | 0006af7d | Michael Hanselmann | # it under the terms of the GNU General Public License as published by |
8 | 0006af7d | Michael Hanselmann | # the Free Software Foundation; either version 2 of the License, or |
9 | 0006af7d | Michael Hanselmann | # (at your option) any later version. |
10 | 0006af7d | Michael Hanselmann | # |
11 | 0006af7d | Michael Hanselmann | # This program is distributed in the hope that it will be useful, but |
12 | 0006af7d | Michael Hanselmann | # WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | 0006af7d | Michael Hanselmann | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | 0006af7d | Michael Hanselmann | # General Public License for more details. |
15 | 0006af7d | Michael Hanselmann | # |
16 | 0006af7d | Michael Hanselmann | # You should have received a copy of the GNU General Public License |
17 | 0006af7d | Michael Hanselmann | # along with this program; if not, write to the Free Software |
18 | 0006af7d | Michael Hanselmann | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
19 | 0006af7d | Michael Hanselmann | # 02110-1301, USA. |
20 | 0006af7d | Michael Hanselmann | |
21 | 0006af7d | Michael Hanselmann | |
22 | 0006af7d | Michael Hanselmann | """Tool to upgrade the configuration file. |
23 | 0006af7d | Michael Hanselmann | |
24 | 319856a9 | Michael Hanselmann | This code handles only the types supported by simplejson. As an example, "set" |
25 | 319856a9 | Michael Hanselmann | is a "list". Old Pickle based configurations files are converted to JSON during |
26 | 319856a9 | Michael Hanselmann | the process. |
27 | 0006af7d | Michael Hanselmann | |
28 | 0006af7d | Michael Hanselmann | """ |
29 | 0006af7d | Michael Hanselmann | |
30 | 0006af7d | Michael Hanselmann | |
31 | 0006af7d | Michael Hanselmann | import os |
32 | 0006af7d | Michael Hanselmann | import os.path |
33 | 0006af7d | Michael Hanselmann | import sys |
34 | 319856a9 | Michael Hanselmann | import re |
35 | 0006af7d | Michael Hanselmann | import optparse |
36 | 0006af7d | Michael Hanselmann | import tempfile |
37 | 319856a9 | Michael Hanselmann | import simplejson |
38 | 0006af7d | Michael Hanselmann | |
39 | 319856a9 | Michael Hanselmann | from ganeti import utils |
40 | 319856a9 | Michael Hanselmann | from ganeti.cli import AskUser, FORCE_OPT |
41 | 0006af7d | Michael Hanselmann | |
42 | 0006af7d | Michael Hanselmann | |
43 | 319856a9 | Michael Hanselmann | options = None |
44 | 319856a9 | Michael Hanselmann | args = None |
45 | 0006af7d | Michael Hanselmann | |
46 | 0006af7d | Michael Hanselmann | |
47 | 319856a9 | Michael Hanselmann | class Error(Exception): |
48 | 319856a9 | Michael Hanselmann | """Generic exception""" |
49 | 319856a9 | Michael Hanselmann | pass |
50 | 0006af7d | Michael Hanselmann | |
51 | 0006af7d | Michael Hanselmann | |
52 | 319856a9 | Michael Hanselmann | # {{{ Support for old Pickle files |
53 | 0006af7d | Michael Hanselmann | class UpgradeDict(dict): |
54 | 0006af7d | Michael Hanselmann | """Base class for internal config classes. |
55 | 0006af7d | Michael Hanselmann | |
56 | 0006af7d | Michael Hanselmann | """ |
57 | 0006af7d | Michael Hanselmann | def __setstate__(self, state): |
58 | 0006af7d | Michael Hanselmann | self.update(state) |
59 | 0006af7d | Michael Hanselmann | |
60 | 0006af7d | Michael Hanselmann | def __getstate__(self): |
61 | 0006af7d | Michael Hanselmann | return self.copy() |
62 | 0006af7d | Michael Hanselmann | |
63 | 0006af7d | Michael Hanselmann | |
64 | 319856a9 | Michael Hanselmann | def FindGlobal(module, name): |
65 | 319856a9 | Michael Hanselmann | """Wraps Ganeti config classes to internal ones. |
66 | 0006af7d | Michael Hanselmann | |
67 | 319856a9 | Michael Hanselmann | This function may only return types supported by simplejson. |
68 | 0006af7d | Michael Hanselmann | |
69 | 319856a9 | Michael Hanselmann | """ |
70 | 319856a9 | Michael Hanselmann | if module == "ganeti.objects": |
71 | 319856a9 | Michael Hanselmann | return UpgradeDict |
72 | 319856a9 | Michael Hanselmann | elif module == "__builtin__" and name == "set": |
73 | 319856a9 | Michael Hanselmann | return list |
74 | 0006af7d | Michael Hanselmann | |
75 | 319856a9 | Michael Hanselmann | return getattr(sys.modules[module], name) |
76 | 0006af7d | Michael Hanselmann | |
77 | 0006af7d | Michael Hanselmann | |
78 | 319856a9 | Michael Hanselmann | def ReadPickleFile(f): |
79 | 319856a9 | Michael Hanselmann | """Reads an old Pickle configuration. |
80 | 0006af7d | Michael Hanselmann | |
81 | 0006af7d | Michael Hanselmann | """ |
82 | 319856a9 | Michael Hanselmann | import cPickle |
83 | 0006af7d | Michael Hanselmann | |
84 | 319856a9 | Michael Hanselmann | loader = cPickle.Unpickler(f) |
85 | 319856a9 | Michael Hanselmann | loader.find_global = FindGlobal |
86 | 319856a9 | Michael Hanselmann | return loader.load() |
87 | 0006af7d | Michael Hanselmann | |
88 | 0006af7d | Michael Hanselmann | |
89 | 319856a9 | Michael Hanselmann | def IsPickleFile(f): |
90 | 319856a9 | Michael Hanselmann | """Checks whether a file is using the Pickle format. |
91 | 0006af7d | Michael Hanselmann | |
92 | 0006af7d | Michael Hanselmann | """ |
93 | 319856a9 | Michael Hanselmann | magic = f.read(128) |
94 | 0006af7d | Michael Hanselmann | try: |
95 | 319856a9 | Michael Hanselmann | return not re.match('^\s*\{', magic) |
96 | 0006af7d | Michael Hanselmann | finally: |
97 | 319856a9 | Michael Hanselmann | f.seek(-len(magic), 1) |
98 | 319856a9 | Michael Hanselmann | # }}} |
99 | 0006af7d | Michael Hanselmann | |
100 | 0006af7d | Michael Hanselmann | |
101 | 319856a9 | Michael Hanselmann | def ReadJsonFile(f): |
102 | 319856a9 | Michael Hanselmann | """Reads a JSON file. |
103 | 0006af7d | Michael Hanselmann | |
104 | 0006af7d | Michael Hanselmann | """ |
105 | 319856a9 | Michael Hanselmann | return simplejson.load(f) |
106 | 0006af7d | Michael Hanselmann | |
107 | 0006af7d | Michael Hanselmann | |
108 | 319856a9 | Michael Hanselmann | def ReadConfig(path): |
109 | 319856a9 | Michael Hanselmann | """Reads configuration file. |
110 | 0006af7d | Michael Hanselmann | |
111 | 0006af7d | Michael Hanselmann | """ |
112 | 319856a9 | Michael Hanselmann | f = open(path, 'r') |
113 | 319856a9 | Michael Hanselmann | try: |
114 | 319856a9 | Michael Hanselmann | if IsPickleFile(f): |
115 | 319856a9 | Michael Hanselmann | return ReadPickleFile(f) |
116 | 319856a9 | Michael Hanselmann | else: |
117 | 319856a9 | Michael Hanselmann | return ReadJsonFile(f) |
118 | 319856a9 | Michael Hanselmann | finally: |
119 | 319856a9 | Michael Hanselmann | f.close() |
120 | 0006af7d | Michael Hanselmann | |
121 | 0006af7d | Michael Hanselmann | |
122 | 319856a9 | Michael Hanselmann | def WriteConfig(path, data): |
123 | 319856a9 | Michael Hanselmann | """Writes the configuration file. |
124 | 319856a9 | Michael Hanselmann | |
125 | 319856a9 | Michael Hanselmann | """ |
126 | 319856a9 | Michael Hanselmann | if not options.dry_run: |
127 | 319856a9 | Michael Hanselmann | utils.CreateBackup(path) |
128 | 0006af7d | Michael Hanselmann | |
129 | 0006af7d | Michael Hanselmann | (fd, name) = tempfile.mkstemp(dir=os.path.dirname(path)) |
130 | 0006af7d | Michael Hanselmann | f = os.fdopen(fd, 'w') |
131 | 0006af7d | Michael Hanselmann | try: |
132 | 0006af7d | Michael Hanselmann | try: |
133 | 319856a9 | Michael Hanselmann | simplejson.dump(data, f) |
134 | 0006af7d | Michael Hanselmann | f.flush() |
135 | 319856a9 | Michael Hanselmann | if options.dry_run: |
136 | 60edf71e | Michael Hanselmann | os.unlink(name) |
137 | 60edf71e | Michael Hanselmann | else: |
138 | 60edf71e | Michael Hanselmann | os.rename(name, path) |
139 | 0006af7d | Michael Hanselmann | except: |
140 | 0006af7d | Michael Hanselmann | os.unlink(name) |
141 | 0006af7d | Michael Hanselmann | raise |
142 | 0006af7d | Michael Hanselmann | finally: |
143 | 0006af7d | Michael Hanselmann | f.close() |
144 | 0006af7d | Michael Hanselmann | |
145 | 0006af7d | Michael Hanselmann | |
146 | 0006af7d | Michael Hanselmann | def UpdateFromVersion2To3(cfg): |
147 | 0006af7d | Michael Hanselmann | """Updates the configuration from version 2 to 3. |
148 | 0006af7d | Michael Hanselmann | |
149 | 0006af7d | Michael Hanselmann | """ |
150 | 0006af7d | Michael Hanselmann | if cfg['cluster']['config_version'] != 2: |
151 | 0006af7d | Michael Hanselmann | return |
152 | 0006af7d | Michael Hanselmann | |
153 | 0006af7d | Michael Hanselmann | # Add port pool |
154 | 0006af7d | Michael Hanselmann | if 'tcpudp_port_pool' not in cfg['cluster']: |
155 | 319856a9 | Michael Hanselmann | cfg['cluster']['tcpudp_port_pool'] = [] |
156 | 0006af7d | Michael Hanselmann | |
157 | 0006af7d | Michael Hanselmann | # Add bridge settings |
158 | 0006af7d | Michael Hanselmann | if 'default_bridge' not in cfg['cluster']: |
159 | 0006af7d | Michael Hanselmann | cfg['cluster']['default_bridge'] = 'xen-br0' |
160 | 0006af7d | Michael Hanselmann | for inst in cfg['instances'].values(): |
161 | 0006af7d | Michael Hanselmann | for nic in inst['nics']: |
162 | 0006af7d | Michael Hanselmann | if 'bridge' not in nic: |
163 | 0006af7d | Michael Hanselmann | nic['bridge'] = None |
164 | 0006af7d | Michael Hanselmann | |
165 | 0006af7d | Michael Hanselmann | cfg['cluster']['config_version'] = 3 |
166 | 0006af7d | Michael Hanselmann | |
167 | 0006af7d | Michael Hanselmann | |
168 | 0006af7d | Michael Hanselmann | # Main program |
169 | 0006af7d | Michael Hanselmann | if __name__ == "__main__": |
170 | 319856a9 | Michael Hanselmann | program = os.path.basename(sys.argv[0]) |
171 | 319856a9 | Michael Hanselmann | |
172 | 0006af7d | Michael Hanselmann | # Option parsing |
173 | 0006af7d | Michael Hanselmann | parser = optparse.OptionParser() |
174 | 60edf71e | Michael Hanselmann | parser.add_option('--dry-run', dest='dry_run', |
175 | 60edf71e | Michael Hanselmann | action="store_true", |
176 | f4bc1f2c | Michael Hanselmann | help="Try to do the conversion, but don't write" |
177 | f4bc1f2c | Michael Hanselmann | " output file") |
178 | 319856a9 | Michael Hanselmann | parser.add_option(FORCE_OPT) |
179 | 0006af7d | Michael Hanselmann | parser.add_option('--verbose', dest='verbose', |
180 | 0006af7d | Michael Hanselmann | action="store_true", |
181 | 0006af7d | Michael Hanselmann | help="Verbose output") |
182 | 0006af7d | Michael Hanselmann | (options, args) = parser.parse_args() |
183 | 0006af7d | Michael Hanselmann | |
184 | 0006af7d | Michael Hanselmann | # Option checking |
185 | 0006af7d | Michael Hanselmann | if args: |
186 | 0006af7d | Michael Hanselmann | cfg_file = args[0] |
187 | 0006af7d | Michael Hanselmann | else: |
188 | 3ecf6786 | Iustin Pop | raise Error("Configuration file not specified") |
189 | 0006af7d | Michael Hanselmann | |
190 | 319856a9 | Michael Hanselmann | if not options.force: |
191 | f4bc1f2c | Michael Hanselmann | usertext = ("%s MUST run on the master node. Is this the master" |
192 | f4bc1f2c | Michael Hanselmann | " node?" % program) |
193 | 319856a9 | Michael Hanselmann | if not AskUser(usertext): |
194 | 319856a9 | Michael Hanselmann | sys.exit(1) |
195 | 319856a9 | Michael Hanselmann | |
196 | 0006af7d | Michael Hanselmann | config = ReadConfig(cfg_file) |
197 | 0006af7d | Michael Hanselmann | |
198 | 319856a9 | Michael Hanselmann | if options.verbose: |
199 | 319856a9 | Michael Hanselmann | import pprint |
200 | 319856a9 | Michael Hanselmann | print "Before upgrade:" |
201 | 319856a9 | Michael Hanselmann | pprint.pprint(config) |
202 | 319856a9 | Michael Hanselmann | |
203 | 319856a9 | Michael Hanselmann | |
204 | 0006af7d | Michael Hanselmann | UpdateFromVersion2To3(config) |
205 | 0006af7d | Michael Hanselmann | |
206 | 0006af7d | Michael Hanselmann | if options.verbose: |
207 | 319856a9 | Michael Hanselmann | print "After upgrade:" |
208 | 0006af7d | Michael Hanselmann | pprint.pprint(config) |
209 | 319856a9 | Michael Hanselmann | |
210 | 319856a9 | Michael Hanselmann | |
211 | 319856a9 | Michael Hanselmann | WriteConfig(cfg_file, config) |
212 | 319856a9 | Michael Hanselmann | |
213 | 319856a9 | Michael Hanselmann | print "The configuration file has been updated successfully. Please run" |
214 | 319856a9 | Michael Hanselmann | print " gnt-cluster copyfile %s" % cfg_file |
215 | 319856a9 | Michael Hanselmann | print "now." |
216 | 0006af7d | Michael Hanselmann | |
217 | 319856a9 | Michael Hanselmann | # vim: set foldmethod=marker : |