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1 | a8083063 | Iustin Pop | #!/usr/bin/python |
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2 | a8083063 | Iustin Pop | # |
3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 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 | """Program which configures LVM on the Ganeti nodes. |
23 | a8083063 | Iustin Pop | |
24 | a8083063 | Iustin Pop | This program wipes disks and creates a volume group on top of them. It |
25 | a8083063 | Iustin Pop | can also show disk information to help you decide which disks you want |
26 | a8083063 | Iustin Pop | to wipe. |
27 | a8083063 | Iustin Pop | |
28 | a8083063 | Iustin Pop | The error handling is done by raising our own exceptions from most of |
29 | a8083063 | Iustin Pop | the functions; these exceptions then handled globally in the main() |
30 | a8083063 | Iustin Pop | function. The exceptions that each function can raise are not |
31 | a8083063 | Iustin Pop | documented individually, since almost every error path ends in a |
32 | a8083063 | Iustin Pop | raise. |
33 | a8083063 | Iustin Pop | |
34 | a8083063 | Iustin Pop | Another two exceptions that are handled globally are IOError and |
35 | a8083063 | Iustin Pop | OSError. The idea behind this is, since we run as root, we should |
36 | a8083063 | Iustin Pop | usually not get these errors, but if we do it's most probably a system |
37 | a8083063 | Iustin Pop | error, so they should be handled and the user instructed to report |
38 | a8083063 | Iustin Pop | them. |
39 | a8083063 | Iustin Pop | """ |
40 | a8083063 | Iustin Pop | |
41 | a8083063 | Iustin Pop | |
42 | a8083063 | Iustin Pop | import os |
43 | a8083063 | Iustin Pop | import sys |
44 | a8083063 | Iustin Pop | import optparse |
45 | a8083063 | Iustin Pop | import time |
46 | a8083063 | Iustin Pop | |
47 | 3374afa9 | Guido Trotter | from ganeti.utils import RunCmd, ReadFile |
48 | a8083063 | Iustin Pop | from ganeti import constants |
49 | e194129a | Stephen Shirley | from ganeti import cli |
50 | a8083063 | Iustin Pop | |
51 | d1687c6f | Iustin Pop | USAGE = ("\tlvmstrap diskinfo\n" |
52 | d1687c6f | Iustin Pop | "\tlvmstrap [--vgname=NAME] [--allow-removable]" |
53 | d1687c6f | Iustin Pop | " { --alldisks | --disks DISKLIST }" |
54 | a8083063 | Iustin Pop | " create") |
55 | a8083063 | Iustin Pop | |
56 | a8083063 | Iustin Pop | verbose_flag = False |
57 | a8083063 | Iustin Pop | |
58 | a8083063 | Iustin Pop | |
59 | a8083063 | Iustin Pop | class Error(Exception): |
60 | a8083063 | Iustin Pop | """Generic exception""" |
61 | a8083063 | Iustin Pop | pass |
62 | a8083063 | Iustin Pop | |
63 | a8083063 | Iustin Pop | |
64 | a8083063 | Iustin Pop | class ProgrammingError(Error): |
65 | a8083063 | Iustin Pop | """Exception denoting invalid assumptions in programming. |
66 | a8083063 | Iustin Pop | |
67 | a8083063 | Iustin Pop | This should catch sysfs tree changes, or otherwise incorrect |
68 | a8083063 | Iustin Pop | assumptions about the contents of the /sys/block/... directories. |
69 | a8083063 | Iustin Pop | """ |
70 | a8083063 | Iustin Pop | pass |
71 | a8083063 | Iustin Pop | |
72 | a8083063 | Iustin Pop | |
73 | a8083063 | Iustin Pop | class SysconfigError(Error): |
74 | a8083063 | Iustin Pop | """Exception denoting invalid system configuration. |
75 | a8083063 | Iustin Pop | |
76 | a8083063 | Iustin Pop | If the system configuration is somehow wrong (e.g. /dev files |
77 | a8083063 | Iustin Pop | missing, or having mismatched major/minor numbers relative to |
78 | a8083063 | Iustin Pop | /sys/block devices), this exception will be raised. |
79 | a8083063 | Iustin Pop | |
80 | a8083063 | Iustin Pop | This should usually mean that the installation of the Xen node |
81 | a8083063 | Iustin Pop | failed in some steps. |
82 | a8083063 | Iustin Pop | """ |
83 | a8083063 | Iustin Pop | pass |
84 | a8083063 | Iustin Pop | |
85 | a8083063 | Iustin Pop | |
86 | a8083063 | Iustin Pop | class PrereqError(Error): |
87 | a8083063 | Iustin Pop | """Exception denoting invalid prerequisites. |
88 | a8083063 | Iustin Pop | |
89 | a8083063 | Iustin Pop | If the node does not meet the requirements for cluster membership, this |
90 | a8083063 | Iustin Pop | exception will be raised. Things like wrong kernel version, or no |
91 | a8083063 | Iustin Pop | free disks, etc. belong here. |
92 | a8083063 | Iustin Pop | |
93 | a8083063 | Iustin Pop | This should usually mean that the build steps for the Xen node were |
94 | a8083063 | Iustin Pop | not followed correctly. |
95 | a8083063 | Iustin Pop | """ |
96 | a8083063 | Iustin Pop | pass |
97 | a8083063 | Iustin Pop | |
98 | a8083063 | Iustin Pop | |
99 | a8083063 | Iustin Pop | class OperationalError(Error): |
100 | a8083063 | Iustin Pop | """Exception denoting actual errors. |
101 | a8083063 | Iustin Pop | |
102 | a8083063 | Iustin Pop | Errors during the bootstrapping are signaled using this exception. |
103 | a8083063 | Iustin Pop | """ |
104 | a8083063 | Iustin Pop | pass |
105 | a8083063 | Iustin Pop | |
106 | a8083063 | Iustin Pop | |
107 | a8083063 | Iustin Pop | class ParameterError(Error): |
108 | a8083063 | Iustin Pop | """Exception denoting invalid input from user. |
109 | a8083063 | Iustin Pop | |
110 | a8083063 | Iustin Pop | Wrong disks given as parameters will be signaled using this |
111 | a8083063 | Iustin Pop | exception. |
112 | a8083063 | Iustin Pop | """ |
113 | a8083063 | Iustin Pop | pass |
114 | a8083063 | Iustin Pop | |
115 | 7c0d6283 | Michael Hanselmann | |
116 | a8083063 | Iustin Pop | def Usage(): |
117 | a8083063 | Iustin Pop | """Shows program usage information and exits the program.""" |
118 | a8083063 | Iustin Pop | |
119 | a8083063 | Iustin Pop | print >> sys.stderr, "Usage:" |
120 | a8083063 | Iustin Pop | print >> sys.stderr, USAGE |
121 | a8083063 | Iustin Pop | sys.exit(2) |
122 | a8083063 | Iustin Pop | |
123 | a8083063 | Iustin Pop | |
124 | a8083063 | Iustin Pop | def ParseOptions(): |
125 | a8083063 | Iustin Pop | """Parses the command line options. |
126 | a8083063 | Iustin Pop | |
127 | a8083063 | Iustin Pop | In case of command line errors, it will show the usage and exit the |
128 | a8083063 | Iustin Pop | program. |
129 | a8083063 | Iustin Pop | |
130 | a8083063 | Iustin Pop | Returns: |
131 | a8083063 | Iustin Pop | (options, args), as returned by OptionParser.parse_args |
132 | a8083063 | Iustin Pop | """ |
133 | a8083063 | Iustin Pop | global verbose_flag |
134 | a8083063 | Iustin Pop | |
135 | a8083063 | Iustin Pop | parser = optparse.OptionParser(usage="\n%s" % USAGE, |
136 | a8083063 | Iustin Pop | version="%%prog (ganeti) %s" % |
137 | a8083063 | Iustin Pop | constants.RELEASE_VERSION) |
138 | a8083063 | Iustin Pop | |
139 | a8083063 | Iustin Pop | parser.add_option("--alldisks", dest="alldisks", |
140 | a8083063 | Iustin Pop | help="erase ALL disks", action="store_true", |
141 | a8083063 | Iustin Pop | default=False) |
142 | a8083063 | Iustin Pop | parser.add_option("-d", "--disks", dest="disks", |
143 | a8083063 | Iustin Pop | help="Choose disks (e.g. hda,hdg)", |
144 | a8083063 | Iustin Pop | metavar="DISKLIST") |
145 | 9cdb9578 | Iustin Pop | parser.add_option(cli.VERBOSE_OPT) |
146 | d1687c6f | Iustin Pop | parser.add_option("-r", "--allow-removable", |
147 | d1687c6f | Iustin Pop | action="store_true", dest="removable_ok", default=False, |
148 | d1687c6f | Iustin Pop | help="allow and use removable devices too") |
149 | a8083063 | Iustin Pop | parser.add_option("-g", "--vg-name", type="string", |
150 | a8083063 | Iustin Pop | dest="vgname", default="xenvg", metavar="NAME", |
151 | a8083063 | Iustin Pop | help="the volume group to be created [default: xenvg]") |
152 | a8083063 | Iustin Pop | |
153 | a8083063 | Iustin Pop | |
154 | a8083063 | Iustin Pop | options, args = parser.parse_args() |
155 | a8083063 | Iustin Pop | if len(args) != 1: |
156 | a8083063 | Iustin Pop | Usage() |
157 | a8083063 | Iustin Pop | |
158 | a8083063 | Iustin Pop | verbose_flag = options.verbose |
159 | a8083063 | Iustin Pop | |
160 | a8083063 | Iustin Pop | return options, args |
161 | a8083063 | Iustin Pop | |
162 | a8083063 | Iustin Pop | |
163 | a8083063 | Iustin Pop | def ExecCommand(command): |
164 | a8083063 | Iustin Pop | """Executes a command. |
165 | a8083063 | Iustin Pop | |
166 | a8083063 | Iustin Pop | This is just a wrapper around commands.getstatusoutput, with the |
167 | a8083063 | Iustin Pop | difference that if the command line argument -v has been given, it |
168 | a8083063 | Iustin Pop | will print the command line and the command output on stdout. |
169 | a8083063 | Iustin Pop | |
170 | a8083063 | Iustin Pop | Args: |
171 | a8083063 | Iustin Pop | the command line |
172 | a8083063 | Iustin Pop | Returns: |
173 | a8083063 | Iustin Pop | (status, output) where status is the exit status and output the |
174 | a8083063 | Iustin Pop | stdout and stderr of the command together |
175 | a8083063 | Iustin Pop | """ |
176 | a8083063 | Iustin Pop | |
177 | a8083063 | Iustin Pop | if verbose_flag: |
178 | a8083063 | Iustin Pop | print command |
179 | a8083063 | Iustin Pop | result = RunCmd(command) |
180 | a8083063 | Iustin Pop | if verbose_flag: |
181 | a8083063 | Iustin Pop | print result.output |
182 | a8083063 | Iustin Pop | return result |
183 | a8083063 | Iustin Pop | |
184 | a8083063 | Iustin Pop | |
185 | a8083063 | Iustin Pop | def CheckPrereq(): |
186 | a8083063 | Iustin Pop | """Check the prerequisites of this program. |
187 | a8083063 | Iustin Pop | |
188 | a8083063 | Iustin Pop | It check that it runs on Linux 2.6, and that /sys is mounted and the |
189 | a8083063 | Iustin Pop | fact that /sys/block is a directory. |
190 | a8083063 | Iustin Pop | """ |
191 | a8083063 | Iustin Pop | |
192 | a8083063 | Iustin Pop | if os.getuid() != 0: |
193 | a8083063 | Iustin Pop | raise PrereqError("This tool runs as root only. Really.") |
194 | a8083063 | Iustin Pop | |
195 | a8083063 | Iustin Pop | osname, nodename, release, version, arch = os.uname() |
196 | a8083063 | Iustin Pop | if osname != 'Linux': |
197 | f4bc1f2c | Michael Hanselmann | raise PrereqError("This tool only runs on Linux" |
198 | f4bc1f2c | Michael Hanselmann | " (detected OS: %s)." % osname) |
199 | a8083063 | Iustin Pop | |
200 | a8083063 | Iustin Pop | if not release.startswith("2.6."): |
201 | f4bc1f2c | Michael Hanselmann | raise PrereqError("Wrong major kernel version (detected %s, needs" |
202 | f4bc1f2c | Michael Hanselmann | " 2.6.*)" % release) |
203 | a8083063 | Iustin Pop | |
204 | a8083063 | Iustin Pop | if not os.path.ismount("/sys"): |
205 | f4bc1f2c | Michael Hanselmann | raise PrereqError("Can't find a filesystem mounted at /sys." |
206 | f4bc1f2c | Michael Hanselmann | " Please mount /sys.") |
207 | a8083063 | Iustin Pop | |
208 | a8083063 | Iustin Pop | if not os.path.isdir("/sys/block"): |
209 | f4bc1f2c | Michael Hanselmann | raise SysconfigError("Can't find /sys/block directory. Has the" |
210 | f4bc1f2c | Michael Hanselmann | " layout of /sys changed?") |
211 | a8083063 | Iustin Pop | |
212 | a8083063 | Iustin Pop | if not os.path.ismount("/proc"): |
213 | f4bc1f2c | Michael Hanselmann | raise PrereqError("Can't find a filesystem mounted at /proc." |
214 | f4bc1f2c | Michael Hanselmann | " Please mount /proc.") |
215 | a8083063 | Iustin Pop | |
216 | a8083063 | Iustin Pop | if not os.path.exists("/proc/mounts"): |
217 | a8083063 | Iustin Pop | raise SysconfigError("Can't find /proc/mounts") |
218 | a8083063 | Iustin Pop | |
219 | a8083063 | Iustin Pop | |
220 | a8083063 | Iustin Pop | def CheckVGExists(vgname): |
221 | a8083063 | Iustin Pop | """Checks to see if a volume group exists. |
222 | a8083063 | Iustin Pop | |
223 | a8083063 | Iustin Pop | Args: |
224 | a8083063 | Iustin Pop | vgname: the volume group name |
225 | a8083063 | Iustin Pop | |
226 | a8083063 | Iustin Pop | Returns: |
227 | a8083063 | Iustin Pop | a four-tuple (exists, lv_count, vg_size, vg_free), where: |
228 | a8083063 | Iustin Pop | exists: True if the volume exists, otherwise False; if False, |
229 | a8083063 | Iustin Pop | all other members of the tuple are None |
230 | a8083063 | Iustin Pop | lv_count: The number of logical volumes in the volume group |
231 | a8083063 | Iustin Pop | vg_size: The total size of the volume group (in gibibytes) |
232 | a8083063 | Iustin Pop | vg_free: The available space in the volume group |
233 | a8083063 | Iustin Pop | """ |
234 | a8083063 | Iustin Pop | |
235 | f4bc1f2c | Michael Hanselmann | result = ExecCommand("vgs --nohead -o lv_count,vg_size,vg_free" |
236 | f4bc1f2c | Michael Hanselmann | " --nosuffix --units g" |
237 | f4bc1f2c | Michael Hanselmann | " --ignorelockingfailure %s" % vgname) |
238 | a8083063 | Iustin Pop | if not result.failed: |
239 | a8083063 | Iustin Pop | try: |
240 | a8083063 | Iustin Pop | lv_count, vg_size, vg_free = result.stdout.strip().split() |
241 | a8083063 | Iustin Pop | except ValueError: |
242 | a8083063 | Iustin Pop | # This means the output of vgdisplay can't be parsed |
243 | a8083063 | Iustin Pop | raise PrereqError("cannot parse output of vgs (%s)" % result.stdout) |
244 | a8083063 | Iustin Pop | else: |
245 | a8083063 | Iustin Pop | lv_count = vg_size = vg_free = None |
246 | a8083063 | Iustin Pop | |
247 | a8083063 | Iustin Pop | return not result.failed, lv_count, vg_size, vg_free |
248 | a8083063 | Iustin Pop | |
249 | a8083063 | Iustin Pop | |
250 | a8083063 | Iustin Pop | def CheckSysDev(name, devnum): |
251 | a8083063 | Iustin Pop | """Checks consistency between /sys and /dev trees. |
252 | a8083063 | Iustin Pop | |
253 | a8083063 | Iustin Pop | In /sys/block/<name>/dev and /sys/block/<name>/<part>/dev are the |
254 | a8083063 | Iustin Pop | kernel-known device numbers. The /dev/<name> block/char devices are |
255 | a8083063 | Iustin Pop | created by userspace and thus could differ from the kernel |
256 | a8083063 | Iustin Pop | view. This function checks the consistency between the device number |
257 | a8083063 | Iustin Pop | read from /sys and the actual device number in /dev. |
258 | a8083063 | Iustin Pop | |
259 | a8083063 | Iustin Pop | Note that since the system could be using udev which removes and |
260 | a8083063 | Iustin Pop | recreates the device nodes on partition table rescan, we need to do |
261 | a8083063 | Iustin Pop | some retries here. Since we only do a stat, we can afford to do many |
262 | a8083063 | Iustin Pop | short retries. |
263 | a8083063 | Iustin Pop | |
264 | a8083063 | Iustin Pop | Args: |
265 | a8083063 | Iustin Pop | name: the device name, e.g. 'sda' |
266 | a8083063 | Iustin Pop | devnum: the device number, e.g. 0x803 (2051 in decimal) for sda3 |
267 | a8083063 | Iustin Pop | |
268 | a8083063 | Iustin Pop | Returns: |
269 | 5bbd3f7f | Michael Hanselmann | None; failure of the check is signaled by raising a |
270 | a8083063 | Iustin Pop | SysconfigError exception |
271 | a8083063 | Iustin Pop | """ |
272 | a8083063 | Iustin Pop | |
273 | a8083063 | Iustin Pop | path = "/dev/%s" % name |
274 | a8083063 | Iustin Pop | for retries in range(40): |
275 | a8083063 | Iustin Pop | if os.path.exists(path): |
276 | a8083063 | Iustin Pop | break |
277 | a8083063 | Iustin Pop | time.sleep(0.250) |
278 | a8083063 | Iustin Pop | else: |
279 | f4bc1f2c | Michael Hanselmann | raise SysconfigError("the device file %s does not exist, but the block" |
280 | f4bc1f2c | Michael Hanselmann | " device exists in the /sys/block tree" % path) |
281 | a8083063 | Iustin Pop | rdev = os.stat(path).st_rdev |
282 | a8083063 | Iustin Pop | if devnum != rdev: |
283 | f4bc1f2c | Michael Hanselmann | raise SysconfigError("For device %s, the major:minor in /dev is %04x" |
284 | f4bc1f2c | Michael Hanselmann | " while the major:minor in sysfs is %s" % |
285 | a8083063 | Iustin Pop | (path, rdev, devnum)) |
286 | a8083063 | Iustin Pop | |
287 | a8083063 | Iustin Pop | |
288 | a8083063 | Iustin Pop | def ReadDev(syspath): |
289 | a8083063 | Iustin Pop | """Reads the device number from a sysfs path. |
290 | a8083063 | Iustin Pop | |
291 | a8083063 | Iustin Pop | The device number is given in sysfs under a block device directory |
292 | a8083063 | Iustin Pop | in a file named 'dev' which contains major:minor (in ASCII). This |
293 | a8083063 | Iustin Pop | function reads that file and converts the major:minor pair to a dev |
294 | a8083063 | Iustin Pop | number. |
295 | a8083063 | Iustin Pop | |
296 | a8083063 | Iustin Pop | Args: |
297 | a8083063 | Iustin Pop | syspath: the path to a block device dir in sysfs, e.g. /sys/block/sda |
298 | a8083063 | Iustin Pop | |
299 | a8083063 | Iustin Pop | Returns: |
300 | a8083063 | Iustin Pop | the device number |
301 | a8083063 | Iustin Pop | """ |
302 | a8083063 | Iustin Pop | |
303 | a8083063 | Iustin Pop | if not os.path.exists("%s/dev" % syspath): |
304 | a8083063 | Iustin Pop | raise ProgrammingError("Invalid path passed to ReadDev: %s" % syspath) |
305 | a8083063 | Iustin Pop | f = open("%s/dev" % syspath) |
306 | a8083063 | Iustin Pop | data = f.read().strip() |
307 | a8083063 | Iustin Pop | f.close() |
308 | a8083063 | Iustin Pop | major, minor = data.split(":", 1) |
309 | a8083063 | Iustin Pop | major = int(major) |
310 | a8083063 | Iustin Pop | minor = int(minor) |
311 | a8083063 | Iustin Pop | dev = os.makedev(major, minor) |
312 | a8083063 | Iustin Pop | return dev |
313 | a8083063 | Iustin Pop | |
314 | a8083063 | Iustin Pop | |
315 | a8083063 | Iustin Pop | def ReadSize(syspath): |
316 | a8083063 | Iustin Pop | """Reads the size from a sysfs path. |
317 | a8083063 | Iustin Pop | |
318 | a8083063 | Iustin Pop | The size is given in sysfs under a block device directory in a file |
319 | a8083063 | Iustin Pop | named 'size' which contains the number of sectors (in ASCII). This |
320 | a8083063 | Iustin Pop | function reads that file and converts the number in sectors to the |
321 | a8083063 | Iustin Pop | size in bytes. |
322 | a8083063 | Iustin Pop | |
323 | a8083063 | Iustin Pop | Args: |
324 | a8083063 | Iustin Pop | syspath: the path to a block device dir in sysfs, e.g. /sys/block/sda |
325 | a8083063 | Iustin Pop | |
326 | a8083063 | Iustin Pop | Returns: |
327 | a8083063 | Iustin Pop | the device size in bytes |
328 | a8083063 | Iustin Pop | """ |
329 | a8083063 | Iustin Pop | |
330 | a8083063 | Iustin Pop | if not os.path.exists("%s/size" % syspath): |
331 | a8083063 | Iustin Pop | raise ProgrammingError("Invalid path passed to ReadSize: %s" % syspath) |
332 | a8083063 | Iustin Pop | f = open("%s/size" % syspath) |
333 | a8083063 | Iustin Pop | data = f.read().strip() |
334 | a8083063 | Iustin Pop | f.close() |
335 | a8083063 | Iustin Pop | size = 512L * int(data) |
336 | a8083063 | Iustin Pop | return size |
337 | a8083063 | Iustin Pop | |
338 | a8083063 | Iustin Pop | |
339 | a8083063 | Iustin Pop | def ReadPV(name): |
340 | a8083063 | Iustin Pop | """Reads physical volume information. |
341 | a8083063 | Iustin Pop | |
342 | a8083063 | Iustin Pop | This function tries to see if a block device is a physical volume. |
343 | a8083063 | Iustin Pop | |
344 | a8083063 | Iustin Pop | Args: |
345 | a8083063 | Iustin Pop | dev: the device name (e.g. sda) |
346 | a8083063 | Iustin Pop | Returns: |
347 | a8083063 | Iustin Pop | The name of the volume group to which this PV belongs, or |
348 | a8083063 | Iustin Pop | "" if this PV is not in use, or |
349 | a8083063 | Iustin Pop | None if this is not a PV |
350 | a8083063 | Iustin Pop | """ |
351 | a8083063 | Iustin Pop | |
352 | a8083063 | Iustin Pop | result = ExecCommand("pvdisplay -c /dev/%s" % name) |
353 | a8083063 | Iustin Pop | if result.failed: |
354 | a8083063 | Iustin Pop | return None |
355 | a8083063 | Iustin Pop | vgname = result.stdout.strip().split(":")[1] |
356 | a8083063 | Iustin Pop | return vgname |
357 | a8083063 | Iustin Pop | |
358 | a8083063 | Iustin Pop | |
359 | d1687c6f | Iustin Pop | def GetDiskList(opts): |
360 | a8083063 | Iustin Pop | """Computes the block device list for this system. |
361 | a8083063 | Iustin Pop | |
362 | a8083063 | Iustin Pop | This function examines the /sys/block tree and using information |
363 | a8083063 | Iustin Pop | therein, computes the status of the block device. |
364 | a8083063 | Iustin Pop | |
365 | a8083063 | Iustin Pop | Returns: |
366 | a8083063 | Iustin Pop | [(name, size, dev, partitions, inuse), ...] |
367 | a8083063 | Iustin Pop | where: |
368 | a8083063 | Iustin Pop | name is the block device name (e.g. sda) |
369 | a8083063 | Iustin Pop | size the size in bytes |
370 | a8083063 | Iustin Pop | dev the device number (e.g. 8704 for hdg) |
371 | a8083063 | Iustin Pop | partitions is [(name, size, dev), ...] mirroring the disk list data |
372 | a8083063 | Iustin Pop | inuse is a boolean showing the in-use status of the disk, computed as the |
373 | a8083063 | Iustin Pop | possibility of re-reading the partition table (the meaning of the |
374 | a8083063 | Iustin Pop | operation varies with the kernel version, but is usually accurate; |
375 | a8083063 | Iustin Pop | a mounted disk/partition or swap-area or PV with active LVs on it |
376 | a8083063 | Iustin Pop | is busy) |
377 | a8083063 | Iustin Pop | """ |
378 | a8083063 | Iustin Pop | |
379 | a8083063 | Iustin Pop | dlist = [] |
380 | a8083063 | Iustin Pop | for name in os.listdir("/sys/block"): |
381 | a8083063 | Iustin Pop | if (not name.startswith("hd") and |
382 | a8083063 | Iustin Pop | not name.startswith("sd") and |
383 | 3c9a0742 | Michael Hanselmann | not name.startswith("ubd")): |
384 | a8083063 | Iustin Pop | continue |
385 | a8083063 | Iustin Pop | |
386 | a8083063 | Iustin Pop | size = ReadSize("/sys/block/%s" % name) |
387 | a8083063 | Iustin Pop | |
388 | a8083063 | Iustin Pop | f = open("/sys/block/%s/removable" % name) |
389 | a8083063 | Iustin Pop | removable = int(f.read().strip()) |
390 | a8083063 | Iustin Pop | f.close() |
391 | a8083063 | Iustin Pop | |
392 | d1687c6f | Iustin Pop | if removable and not opts.removable_ok: |
393 | a8083063 | Iustin Pop | continue |
394 | a8083063 | Iustin Pop | |
395 | a8083063 | Iustin Pop | dev = ReadDev("/sys/block/%s" % name) |
396 | a8083063 | Iustin Pop | CheckSysDev(name, dev) |
397 | a8083063 | Iustin Pop | inuse = not CheckReread(name) |
398 | a8083063 | Iustin Pop | # Enumerate partitions of the block device |
399 | a8083063 | Iustin Pop | partitions = [] |
400 | a8083063 | Iustin Pop | for partname in os.listdir("/sys/block/%s" % name): |
401 | a8083063 | Iustin Pop | if not partname.startswith(name): |
402 | a8083063 | Iustin Pop | continue |
403 | a8083063 | Iustin Pop | partdev = ReadDev("/sys/block/%s/%s" % (name, partname)) |
404 | a8083063 | Iustin Pop | partsize = ReadSize("/sys/block/%s/%s" % (name, partname)) |
405 | a8083063 | Iustin Pop | CheckSysDev(partname, partdev) |
406 | a8083063 | Iustin Pop | partitions.append((partname, partsize, partdev)) |
407 | a8083063 | Iustin Pop | partitions.sort() |
408 | a8083063 | Iustin Pop | dlist.append((name, size, dev, partitions, inuse)) |
409 | a8083063 | Iustin Pop | dlist.sort() |
410 | a8083063 | Iustin Pop | return dlist |
411 | a8083063 | Iustin Pop | |
412 | a8083063 | Iustin Pop | |
413 | a8083063 | Iustin Pop | def GetMountInfo(): |
414 | a8083063 | Iustin Pop | """Reads /proc/mounts and computes the mountpoint-devnum mapping. |
415 | a8083063 | Iustin Pop | |
416 | a8083063 | Iustin Pop | This function reads /proc/mounts, finds the mounted filesystems |
417 | a8083063 | Iustin Pop | (excepting a hard-coded blacklist of network and virtual |
418 | a8083063 | Iustin Pop | filesystems) and does a stat on these mountpoints. The st_dev number |
419 | a8083063 | Iustin Pop | of the results is memorised for later matching against the |
420 | a8083063 | Iustin Pop | /sys/block devices. |
421 | a8083063 | Iustin Pop | |
422 | a8083063 | Iustin Pop | Returns: |
423 | a8083063 | Iustin Pop | a mountpoint: device number dictionary |
424 | a8083063 | Iustin Pop | """ |
425 | a8083063 | Iustin Pop | |
426 | 3374afa9 | Guido Trotter | mountlines = ReadFile("/proc/mounts").splitlines() |
427 | a8083063 | Iustin Pop | mounts = {} |
428 | a8083063 | Iustin Pop | for line in mountlines: |
429 | a8083063 | Iustin Pop | device, mountpoint, fstype, rest = line.split(None, 3) |
430 | a8083063 | Iustin Pop | # fs type blacklist |
431 | a8083063 | Iustin Pop | if fstype in ["nfs", "nfs4", "autofs", "tmpfs", "proc", "sysfs"]: |
432 | a8083063 | Iustin Pop | continue |
433 | a8083063 | Iustin Pop | try: |
434 | a8083063 | Iustin Pop | dev = os.stat(mountpoint).st_dev |
435 | a8083063 | Iustin Pop | except OSError, err: |
436 | a8083063 | Iustin Pop | # this should be a fairly rare error, since we are blacklisting |
437 | a8083063 | Iustin Pop | # network filesystems; with this in mind, we'll ignore it, |
438 | a8083063 | Iustin Pop | # since the rereadpt check catches in-use filesystems, |
439 | a8083063 | Iustin Pop | # and this is used for disk information only |
440 | a8083063 | Iustin Pop | print >> sys.stderr, ("Can't stat mountpoint '%s': %s" % |
441 | a8083063 | Iustin Pop | (mountpoint, err)) |
442 | a8083063 | Iustin Pop | print >> sys.stderr, "Ignoring." |
443 | a8083063 | Iustin Pop | continue |
444 | a8083063 | Iustin Pop | mounts[dev] = mountpoint |
445 | a8083063 | Iustin Pop | return mounts |
446 | a8083063 | Iustin Pop | |
447 | a8083063 | Iustin Pop | |
448 | a8083063 | Iustin Pop | def DevInfo(name, dev, mountinfo): |
449 | 5bbd3f7f | Michael Hanselmann | """Computes miscellaneous information about a block device. |
450 | a8083063 | Iustin Pop | |
451 | a8083063 | Iustin Pop | Args: |
452 | a8083063 | Iustin Pop | name: the device name, e.g. sda |
453 | a8083063 | Iustin Pop | |
454 | a8083063 | Iustin Pop | Returns: |
455 | a8083063 | Iustin Pop | (mpath, whatvg, fileinfo), where |
456 | a8083063 | Iustin Pop | mpath is the mount path where this device is mounted or None |
457 | a8083063 | Iustin Pop | whatvg is the result of the ReadPV function |
458 | a8083063 | Iustin Pop | fileinfo is the output of file -bs on the device |
459 | a8083063 | Iustin Pop | """ |
460 | a8083063 | Iustin Pop | |
461 | a8083063 | Iustin Pop | if dev in mountinfo: |
462 | a8083063 | Iustin Pop | mpath = mountinfo[dev] |
463 | a8083063 | Iustin Pop | else: |
464 | a8083063 | Iustin Pop | mpath = None |
465 | a8083063 | Iustin Pop | |
466 | a8083063 | Iustin Pop | whatvg = ReadPV(name) |
467 | a8083063 | Iustin Pop | |
468 | a8083063 | Iustin Pop | result = ExecCommand("file -bs /dev/%s" % name) |
469 | a8083063 | Iustin Pop | if result.failed: |
470 | a8083063 | Iustin Pop | fileinfo = "<error: %s>" % result.stderr |
471 | a8083063 | Iustin Pop | fileinfo = result.stdout[:45] |
472 | a8083063 | Iustin Pop | return mpath, whatvg, fileinfo |
473 | a8083063 | Iustin Pop | |
474 | a8083063 | Iustin Pop | |
475 | d1687c6f | Iustin Pop | def ShowDiskInfo(opts): |
476 | a8083063 | Iustin Pop | """Shows a nicely formatted block device list for this system. |
477 | a8083063 | Iustin Pop | |
478 | 5bbd3f7f | Michael Hanselmann | This function shows the user a table with the information gathered |
479 | a8083063 | Iustin Pop | by the other functions defined, in order to help the user make a |
480 | a8083063 | Iustin Pop | choice about which disks should be allocated to our volume group. |
481 | a8083063 | Iustin Pop | |
482 | a8083063 | Iustin Pop | """ |
483 | a8083063 | Iustin Pop | mounts = GetMountInfo() |
484 | d1687c6f | Iustin Pop | dlist = GetDiskList(opts) |
485 | a8083063 | Iustin Pop | |
486 | a8083063 | Iustin Pop | print "------- Disk information -------" |
487 | e194129a | Stephen Shirley | headers = { |
488 | e194129a | Stephen Shirley | "name": "Name", |
489 | e194129a | Stephen Shirley | "size": "Size[M]", |
490 | e194129a | Stephen Shirley | "used": "Used", |
491 | e194129a | Stephen Shirley | "mount": "Mount", |
492 | e194129a | Stephen Shirley | "lvm": "LVM?", |
493 | e194129a | Stephen Shirley | "info": "Info" |
494 | e194129a | Stephen Shirley | } |
495 | e194129a | Stephen Shirley | fields = ["name", "size", "used", "mount", "lvm", "info"] |
496 | a8083063 | Iustin Pop | |
497 | a8083063 | Iustin Pop | flatlist = [] |
498 | a8083063 | Iustin Pop | # Flatten the [(disk, [partition,...]), ...] list |
499 | a8083063 | Iustin Pop | for name, size, dev, parts, inuse in dlist: |
500 | a8083063 | Iustin Pop | if inuse: |
501 | a8083063 | Iustin Pop | str_inuse = "yes" |
502 | a8083063 | Iustin Pop | else: |
503 | a8083063 | Iustin Pop | str_inuse = "no" |
504 | a8083063 | Iustin Pop | flatlist.append((name, size, dev, str_inuse)) |
505 | a8083063 | Iustin Pop | for partname, partsize, partdev in parts: |
506 | a8083063 | Iustin Pop | flatlist.append((partname, partsize, partdev, "")) |
507 | a8083063 | Iustin Pop | |
508 | e194129a | Stephen Shirley | strlist = [] |
509 | a8083063 | Iustin Pop | for name, size, dev, in_use in flatlist: |
510 | a8083063 | Iustin Pop | mp, vgname, fileinfo = DevInfo(name, dev, mounts) |
511 | a8083063 | Iustin Pop | if mp is None: |
512 | a8083063 | Iustin Pop | mp = "-" |
513 | a8083063 | Iustin Pop | if vgname is None: |
514 | a8083063 | Iustin Pop | lvminfo = "-" |
515 | a8083063 | Iustin Pop | elif vgname == "": |
516 | a8083063 | Iustin Pop | lvminfo = "yes,free" |
517 | a8083063 | Iustin Pop | else: |
518 | a8083063 | Iustin Pop | lvminfo = "in %s" % vgname |
519 | a8083063 | Iustin Pop | |
520 | a8083063 | Iustin Pop | if len(name) > 3: |
521 | a8083063 | Iustin Pop | # Indent partitions |
522 | a8083063 | Iustin Pop | name = " %s" % name |
523 | e194129a | Stephen Shirley | |
524 | e194129a | Stephen Shirley | strlist.append([name, "%.2f" % (float(size) / 1024 / 1024), |
525 | e194129a | Stephen Shirley | in_use, mp, lvminfo, fileinfo]) |
526 | e194129a | Stephen Shirley | |
527 | e194129a | Stephen Shirley | data = cli.GenerateTable(headers, fields, None, |
528 | e194129a | Stephen Shirley | strlist, numfields=["size"]) |
529 | e194129a | Stephen Shirley | |
530 | e194129a | Stephen Shirley | for line in data: |
531 | e194129a | Stephen Shirley | print line |
532 | a8083063 | Iustin Pop | |
533 | a8083063 | Iustin Pop | |
534 | a8083063 | Iustin Pop | def CheckReread(name): |
535 | a8083063 | Iustin Pop | """Check to see if a block device is in use. |
536 | a8083063 | Iustin Pop | |
537 | a8083063 | Iustin Pop | Uses blockdev to reread the partition table of a block device, and |
538 | a8083063 | Iustin Pop | thus compute the in-use status. See the discussion in GetDiskList |
539 | a8083063 | Iustin Pop | about the meaning of 'in use'. |
540 | a8083063 | Iustin Pop | |
541 | a8083063 | Iustin Pop | Returns: |
542 | a8083063 | Iustin Pop | boolean, the in-use status of the device |
543 | a8083063 | Iustin Pop | """ |
544 | a8083063 | Iustin Pop | |
545 | a8083063 | Iustin Pop | for retries in range(3): |
546 | a8083063 | Iustin Pop | result = ExecCommand("blockdev --rereadpt /dev/%s" % name) |
547 | a8083063 | Iustin Pop | if not result.failed: |
548 | a8083063 | Iustin Pop | break |
549 | a8083063 | Iustin Pop | time.sleep(2) |
550 | a8083063 | Iustin Pop | |
551 | a8083063 | Iustin Pop | return not result.failed |
552 | a8083063 | Iustin Pop | |
553 | a8083063 | Iustin Pop | |
554 | a8083063 | Iustin Pop | def WipeDisk(name): |
555 | a8083063 | Iustin Pop | """Wipes a block device. |
556 | a8083063 | Iustin Pop | |
557 | a8083063 | Iustin Pop | This function wipes a block device, by clearing and re-reading the |
558 | a8083063 | Iustin Pop | partition table. If not successful, it writes back the old partition |
559 | a8083063 | Iustin Pop | data, and leaves the cleanup to the user. |
560 | a8083063 | Iustin Pop | |
561 | a8083063 | Iustin Pop | Args: |
562 | a8083063 | Iustin Pop | the device name (e.g. sda) |
563 | a8083063 | Iustin Pop | """ |
564 | a8083063 | Iustin Pop | |
565 | a8083063 | Iustin Pop | if not CheckReread(name): |
566 | f4bc1f2c | Michael Hanselmann | raise OperationalError("CRITICAL: disk %s you selected seems to be in" |
567 | f4bc1f2c | Michael Hanselmann | " use. ABORTING!" % name) |
568 | a8083063 | Iustin Pop | |
569 | a8083063 | Iustin Pop | fd = os.open("/dev/%s" % name, os.O_RDWR | os.O_SYNC) |
570 | a8083063 | Iustin Pop | olddata = os.read(fd, 512) |
571 | a8083063 | Iustin Pop | if len(olddata) != 512: |
572 | f4bc1f2c | Michael Hanselmann | raise OperationalError("CRITICAL: Can't read partition table information" |
573 | f4bc1f2c | Michael Hanselmann | " from /dev/%s (needed 512 bytes, got %d" % |
574 | a8083063 | Iustin Pop | (name, len(olddata))) |
575 | a8083063 | Iustin Pop | newdata = "\0" * 512 |
576 | a8083063 | Iustin Pop | os.lseek(fd, 0, 0) |
577 | a8083063 | Iustin Pop | bytes_written = os.write(fd, newdata) |
578 | a8083063 | Iustin Pop | os.close(fd) |
579 | a8083063 | Iustin Pop | if bytes_written != 512: |
580 | a8083063 | Iustin Pop | raise OperationalError("CRITICAL: Can't write partition table information" |
581 | f4bc1f2c | Michael Hanselmann | " to /dev/%s (tried to write 512 bytes, written" |
582 | f4bc1f2c | Michael Hanselmann | " %d. I don't know how to cleanup. Sorry." % |
583 | a8083063 | Iustin Pop | (name, bytes_written)) |
584 | a8083063 | Iustin Pop | |
585 | a8083063 | Iustin Pop | if not CheckReread(name): |
586 | a8083063 | Iustin Pop | fd = os.open("/dev/%s" % name, os.O_RDWR | os.O_SYNC) |
587 | a8083063 | Iustin Pop | os.write(fd, olddata) |
588 | a8083063 | Iustin Pop | os.close(fd) |
589 | f4bc1f2c | Michael Hanselmann | raise OperationalError("CRITICAL: disk %s which I have just wiped cannot" |
590 | f4bc1f2c | Michael Hanselmann | " reread partition table. Most likely, it is" |
591 | f4bc1f2c | Michael Hanselmann | " in use. You have to clean after this yourself." |
592 | f4bc1f2c | Michael Hanselmann | " I tried to restore the old partition table," |
593 | f4bc1f2c | Michael Hanselmann | " but I cannot guarantee nothing has broken." % |
594 | a8083063 | Iustin Pop | name) |
595 | a8083063 | Iustin Pop | |
596 | a8083063 | Iustin Pop | |
597 | a8083063 | Iustin Pop | def PartitionDisk(name): |
598 | a8083063 | Iustin Pop | """Partitions a disk. |
599 | a8083063 | Iustin Pop | |
600 | a8083063 | Iustin Pop | This function creates a single partition spanning the entire disk, |
601 | a8083063 | Iustin Pop | by means of fdisk. |
602 | a8083063 | Iustin Pop | |
603 | a8083063 | Iustin Pop | Args: |
604 | a8083063 | Iustin Pop | the device name, e.g. sda |
605 | a8083063 | Iustin Pop | """ |
606 | a8083063 | Iustin Pop | result = ExecCommand( |
607 | a8083063 | Iustin Pop | 'echo ,,8e, | sfdisk /dev/%s' % name) |
608 | a8083063 | Iustin Pop | if result.failed: |
609 | f4bc1f2c | Michael Hanselmann | raise OperationalError("CRITICAL: disk %s which I have just partitioned" |
610 | f4bc1f2c | Michael Hanselmann | " cannot reread its partition table, or there" |
611 | f4bc1f2c | Michael Hanselmann | " is some other sfdisk error. Likely, it is in" |
612 | f4bc1f2c | Michael Hanselmann | " use. You have to clean this yourself. Error" |
613 | f4bc1f2c | Michael Hanselmann | " message from sfdisk: %s" % |
614 | a8083063 | Iustin Pop | (name, result.output)) |
615 | a8083063 | Iustin Pop | |
616 | a8083063 | Iustin Pop | |
617 | a8083063 | Iustin Pop | def CreatePVOnDisk(name): |
618 | a8083063 | Iustin Pop | """Creates a physical volume on a block device. |
619 | a8083063 | Iustin Pop | |
620 | a8083063 | Iustin Pop | This function creates a physical volume on a block device, overriding |
621 | a8083063 | Iustin Pop | all warnings. So it can wipe existing PVs and PVs which are in a VG. |
622 | a8083063 | Iustin Pop | |
623 | a8083063 | Iustin Pop | Args: |
624 | a8083063 | Iustin Pop | the device name, e.g. sda |
625 | a8083063 | Iustin Pop | |
626 | a8083063 | Iustin Pop | """ |
627 | a8083063 | Iustin Pop | result = ExecCommand("pvcreate -yff /dev/%s1 " % name) |
628 | a8083063 | Iustin Pop | if result.failed: |
629 | f4bc1f2c | Michael Hanselmann | raise OperationalError("I cannot create a physical volume on" |
630 | f4bc1f2c | Michael Hanselmann | " partition /dev/%s1. Error message: %s." |
631 | f4bc1f2c | Michael Hanselmann | " Please clean up yourself." % |
632 | a8083063 | Iustin Pop | (name, result.output)) |
633 | a8083063 | Iustin Pop | |
634 | a8083063 | Iustin Pop | |
635 | a8083063 | Iustin Pop | def CreateVG(vgname, disks): |
636 | a8083063 | Iustin Pop | """Creates the volume group. |
637 | a8083063 | Iustin Pop | |
638 | a8083063 | Iustin Pop | This function creates a volume group named `vgname` on the disks |
639 | a8083063 | Iustin Pop | given as parameters. The physical extent size is set to 64MB. |
640 | a8083063 | Iustin Pop | |
641 | a8083063 | Iustin Pop | Args: |
642 | a8083063 | Iustin Pop | disks: a list of disk names, e.g. ['sda','sdb'] |
643 | a8083063 | Iustin Pop | |
644 | a8083063 | Iustin Pop | """ |
645 | a8083063 | Iustin Pop | pnames = ["'/dev/%s1'" % disk for disk in disks] |
646 | a8083063 | Iustin Pop | result = ExecCommand("vgcreate -s 64MB '%s' %s" % (vgname, " ".join(pnames))) |
647 | a8083063 | Iustin Pop | if result.failed: |
648 | f4bc1f2c | Michael Hanselmann | raise OperationalError("I cannot create the volume group %s from" |
649 | f4bc1f2c | Michael Hanselmann | " disks %s. Error message: %s. Please clean up" |
650 | f4bc1f2c | Michael Hanselmann | " yourself." % |
651 | a8083063 | Iustin Pop | (vgname, " ".join(disks), result.output)) |
652 | a8083063 | Iustin Pop | |
653 | a8083063 | Iustin Pop | |
654 | a8083063 | Iustin Pop | def ValidateDiskList(options): |
655 | a8083063 | Iustin Pop | """Validates or computes the disk list for create. |
656 | a8083063 | Iustin Pop | |
657 | a8083063 | Iustin Pop | This function either computes the available disk list (if the user |
658 | a8083063 | Iustin Pop | gave --alldisks option), or validates the user-given disk list (by |
659 | a8083063 | Iustin Pop | using the --disks option) such that all given disks are present and |
660 | a8083063 | Iustin Pop | not in use. |
661 | a8083063 | Iustin Pop | |
662 | a8083063 | Iustin Pop | Args: |
663 | a8083063 | Iustin Pop | the options returned from OptParser.parse_options |
664 | a8083063 | Iustin Pop | |
665 | a8083063 | Iustin Pop | Returns: |
666 | a8083063 | Iustin Pop | a list of disk names, e.g. ['sda', 'sdb'] |
667 | a8083063 | Iustin Pop | """ |
668 | a8083063 | Iustin Pop | |
669 | d1687c6f | Iustin Pop | sysdisks = GetDiskList(options) |
670 | a8083063 | Iustin Pop | if not sysdisks: |
671 | f4bc1f2c | Michael Hanselmann | raise PrereqError("no disks found (I looked for" |
672 | f4bc1f2c | Michael Hanselmann | " non-removable block devices).") |
673 | a8083063 | Iustin Pop | sysd_free = [] |
674 | a8083063 | Iustin Pop | sysd_used = [] |
675 | a8083063 | Iustin Pop | for name, size, dev, part, used in sysdisks: |
676 | a8083063 | Iustin Pop | if used: |
677 | a8083063 | Iustin Pop | sysd_used.append(name) |
678 | a8083063 | Iustin Pop | else: |
679 | a8083063 | Iustin Pop | sysd_free.append(name) |
680 | a8083063 | Iustin Pop | |
681 | a8083063 | Iustin Pop | if not sysd_free: |
682 | a8083063 | Iustin Pop | raise PrereqError("no free disks found! (%d in-use disks)" % |
683 | a8083063 | Iustin Pop | len(sysd_used)) |
684 | a8083063 | Iustin Pop | if options.alldisks: |
685 | a8083063 | Iustin Pop | disklist = sysd_free |
686 | a8083063 | Iustin Pop | elif options.disks: |
687 | a8083063 | Iustin Pop | disklist = options.disks.split(",") |
688 | a8083063 | Iustin Pop | for name in disklist: |
689 | a8083063 | Iustin Pop | if name in sysd_used: |
690 | a8083063 | Iustin Pop | raise ParameterError("disk %s is in use, cannot wipe!" % name) |
691 | a8083063 | Iustin Pop | if name not in sysd_free: |
692 | a8083063 | Iustin Pop | raise ParameterError("cannot find disk %s!" % name) |
693 | a8083063 | Iustin Pop | else: |
694 | a8083063 | Iustin Pop | raise ParameterError("Please use either --alldisks or --disks!") |
695 | a8083063 | Iustin Pop | |
696 | a8083063 | Iustin Pop | return disklist |
697 | a8083063 | Iustin Pop | |
698 | f4bc1f2c | Michael Hanselmann | |
699 | a8083063 | Iustin Pop | def BootStrap(): |
700 | a8083063 | Iustin Pop | """Actual main routine.""" |
701 | a8083063 | Iustin Pop | |
702 | a8083063 | Iustin Pop | CheckPrereq() |
703 | a8083063 | Iustin Pop | |
704 | a8083063 | Iustin Pop | options, args = ParseOptions() |
705 | a8083063 | Iustin Pop | vgname = options.vgname |
706 | a8083063 | Iustin Pop | command = args.pop(0) |
707 | a8083063 | Iustin Pop | if command == "diskinfo": |
708 | d1687c6f | Iustin Pop | ShowDiskInfo(options) |
709 | a8083063 | Iustin Pop | return |
710 | a8083063 | Iustin Pop | if command != "create": |
711 | a8083063 | Iustin Pop | Usage() |
712 | a8083063 | Iustin Pop | |
713 | a8083063 | Iustin Pop | exists, lv_count, vg_size, vg_free = CheckVGExists(vgname) |
714 | a8083063 | Iustin Pop | if exists: |
715 | a8083063 | Iustin Pop | raise PrereqError("It seems volume group '%s' already exists:\n" |
716 | a8083063 | Iustin Pop | " LV count: %s, size: %s, free: %s." % |
717 | a8083063 | Iustin Pop | (vgname, lv_count, vg_size, vg_free)) |
718 | a8083063 | Iustin Pop | |
719 | a8083063 | Iustin Pop | |
720 | a8083063 | Iustin Pop | disklist = ValidateDiskList(options) |
721 | a8083063 | Iustin Pop | |
722 | a8083063 | Iustin Pop | for disk in disklist: |
723 | a8083063 | Iustin Pop | WipeDisk(disk) |
724 | a8083063 | Iustin Pop | PartitionDisk(disk) |
725 | a8083063 | Iustin Pop | for disk in disklist: |
726 | a8083063 | Iustin Pop | CreatePVOnDisk(disk) |
727 | a8083063 | Iustin Pop | CreateVG(vgname, disklist) |
728 | a8083063 | Iustin Pop | |
729 | a8083063 | Iustin Pop | status, lv_count, size, free = CheckVGExists(vgname) |
730 | a8083063 | Iustin Pop | if status: |
731 | a8083063 | Iustin Pop | print "Done! %s: size %s GiB, disks: %s" % (vgname, size, |
732 | f4bc1f2c | Michael Hanselmann | ",".join(disklist)) |
733 | a8083063 | Iustin Pop | else: |
734 | f4bc1f2c | Michael Hanselmann | raise OperationalError("Although everything seemed ok, the volume" |
735 | f4bc1f2c | Michael Hanselmann | " group did not get created.") |
736 | a8083063 | Iustin Pop | |
737 | a8083063 | Iustin Pop | |
738 | a8083063 | Iustin Pop | def main(): |
739 | a8083063 | Iustin Pop | """application entry point. |
740 | a8083063 | Iustin Pop | |
741 | a8083063 | Iustin Pop | This is just a wrapper over BootStrap, to handle our own exceptions. |
742 | a8083063 | Iustin Pop | """ |
743 | a8083063 | Iustin Pop | |
744 | a8083063 | Iustin Pop | try: |
745 | a8083063 | Iustin Pop | BootStrap() |
746 | a8083063 | Iustin Pop | except PrereqError, err: |
747 | a8083063 | Iustin Pop | print >> sys.stderr, "The prerequisites for running this tool are not met." |
748 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("Please make sure you followed all the steps in" |
749 | f4bc1f2c | Michael Hanselmann | " the build document.") |
750 | a8083063 | Iustin Pop | print >> sys.stderr, "Description: %s" % str(err) |
751 | a8083063 | Iustin Pop | sys.exit(1) |
752 | a8083063 | Iustin Pop | except SysconfigError, err: |
753 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("This system's configuration seems wrong, at" |
754 | f4bc1f2c | Michael Hanselmann | " least is not what I expect.") |
755 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("Please check that the installation didn't fail" |
756 | f4bc1f2c | Michael Hanselmann | " at some step.") |
757 | a8083063 | Iustin Pop | print >> sys.stderr, "Description: %s" % str(err) |
758 | a8083063 | Iustin Pop | sys.exit(1) |
759 | a8083063 | Iustin Pop | except ParameterError, err: |
760 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("Some parameters you gave to the program or the" |
761 | f4bc1f2c | Michael Hanselmann | " invocation is wrong. ") |
762 | a8083063 | Iustin Pop | print >> sys.stderr, "Description: %s" % str(err) |
763 | a8083063 | Iustin Pop | Usage() |
764 | a8083063 | Iustin Pop | except OperationalError, err: |
765 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("A serious error has happened while modifying" |
766 | f4bc1f2c | Michael Hanselmann | " the system's configuration.") |
767 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("Please review the error message below and make" |
768 | f4bc1f2c | Michael Hanselmann | " sure you clean up yourself.") |
769 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("It is most likely that the system configuration" |
770 | f4bc1f2c | Michael Hanselmann | " has been partially altered.") |
771 | a8083063 | Iustin Pop | print >> sys.stderr, str(err) |
772 | a8083063 | Iustin Pop | sys.exit(1) |
773 | a8083063 | Iustin Pop | except ProgrammingError, err: |
774 | f4bc1f2c | Michael Hanselmann | print >> sys.stderr, ("Internal application error. Please signal this" |
775 | f4bc1f2c | Michael Hanselmann | " to xencluster-team.") |
776 | a8083063 | Iustin Pop | print >> sys.stderr, "Error description: %s" % str(err) |
777 | a8083063 | Iustin Pop | sys.exit(1) |
778 | a8083063 | Iustin Pop | except Error, err: |
779 | a8083063 | Iustin Pop | print >> sys.stderr, "Unhandled application error: %s" % err |
780 | a8083063 | Iustin Pop | sys.exit(1) |
781 | a8083063 | Iustin Pop | except (IOError, OSError), err: |
782 | a8083063 | Iustin Pop | print >> sys.stderr, "I/O error detected, please report." |
783 | a8083063 | Iustin Pop | print >> sys.stderr, "Description: %s" % str(err) |
784 | a8083063 | Iustin Pop | sys.exit(1) |
785 | a8083063 | Iustin Pop | |
786 | a8083063 | Iustin Pop | |
787 | a8083063 | Iustin Pop | if __name__ == "__main__": |
788 | a8083063 | Iustin Pop | main() |