root / lib / bdev.py @ f2f57b6e
History | View | Annotate | Download (76.7 kB)
1 | 2f31098c | Iustin Pop | #
|
---|---|---|---|
2 | a8083063 | Iustin Pop | #
|
3 | a8083063 | Iustin Pop | |
4 | 4b97f902 | Apollon Oikonomopoulos | # Copyright (C) 2006, 2007, 2010, 2011 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 | """Block device abstraction"""
|
23 | a8083063 | Iustin Pop | |
24 | a8083063 | Iustin Pop | import re |
25 | a8083063 | Iustin Pop | import time |
26 | a8083063 | Iustin Pop | import errno |
27 | ad1dd4c7 | Andrea Spadaccini | import shlex |
28 | b6135bbc | Apollon Oikonomopoulos | import stat |
29 | a2cfdea2 | Iustin Pop | import pyparsing as pyp |
30 | 6f695a2e | Manuel Franceschini | import os |
31 | 468c5f77 | Iustin Pop | import logging |
32 | a8083063 | Iustin Pop | |
33 | a8083063 | Iustin Pop | from ganeti import utils |
34 | a8083063 | Iustin Pop | from ganeti import errors |
35 | fe96220b | Iustin Pop | from ganeti import constants |
36 | 96acbc09 | Michael Hanselmann | from ganeti import objects |
37 | cea881e5 | Michael Hanselmann | from ganeti import compat |
38 | a744b676 | Manuel Franceschini | from ganeti import netutils |
39 | a8083063 | Iustin Pop | |
40 | a8083063 | Iustin Pop | |
41 | 310fbb64 | Iustin Pop | # Size of reads in _CanReadDevice
|
42 | 310fbb64 | Iustin Pop | _DEVICE_READ_SIZE = 128 * 1024 |
43 | 310fbb64 | Iustin Pop | |
44 | 310fbb64 | Iustin Pop | |
45 | 82463074 | Iustin Pop | def _IgnoreError(fn, *args, **kwargs): |
46 | 82463074 | Iustin Pop | """Executes the given function, ignoring BlockDeviceErrors.
|
47 | 82463074 | Iustin Pop |
|
48 | 82463074 | Iustin Pop | This is used in order to simplify the execution of cleanup or
|
49 | 82463074 | Iustin Pop | rollback functions.
|
50 | 82463074 | Iustin Pop |
|
51 | 82463074 | Iustin Pop | @rtype: boolean
|
52 | 82463074 | Iustin Pop | @return: True when fn didn't raise an exception, False otherwise
|
53 | 82463074 | Iustin Pop |
|
54 | 82463074 | Iustin Pop | """
|
55 | 82463074 | Iustin Pop | try:
|
56 | 82463074 | Iustin Pop | fn(*args, **kwargs) |
57 | 82463074 | Iustin Pop | return True |
58 | 82463074 | Iustin Pop | except errors.BlockDeviceError, err:
|
59 | 099c52ad | Iustin Pop | logging.warning("Caught BlockDeviceError but ignoring: %s", str(err)) |
60 | 82463074 | Iustin Pop | return False |
61 | 82463074 | Iustin Pop | |
62 | 82463074 | Iustin Pop | |
63 | 82463074 | Iustin Pop | def _ThrowError(msg, *args): |
64 | 82463074 | Iustin Pop | """Log an error to the node daemon and the raise an exception.
|
65 | 82463074 | Iustin Pop |
|
66 | 82463074 | Iustin Pop | @type msg: string
|
67 | 82463074 | Iustin Pop | @param msg: the text of the exception
|
68 | 82463074 | Iustin Pop | @raise errors.BlockDeviceError
|
69 | 82463074 | Iustin Pop |
|
70 | 82463074 | Iustin Pop | """
|
71 | 82463074 | Iustin Pop | if args:
|
72 | 82463074 | Iustin Pop | msg = msg % args |
73 | 82463074 | Iustin Pop | logging.error(msg) |
74 | 82463074 | Iustin Pop | raise errors.BlockDeviceError(msg)
|
75 | 82463074 | Iustin Pop | |
76 | 82463074 | Iustin Pop | |
77 | 310fbb64 | Iustin Pop | def _CanReadDevice(path): |
78 | 310fbb64 | Iustin Pop | """Check if we can read from the given device.
|
79 | 310fbb64 | Iustin Pop |
|
80 | 310fbb64 | Iustin Pop | This tries to read the first 128k of the device.
|
81 | 310fbb64 | Iustin Pop |
|
82 | 310fbb64 | Iustin Pop | """
|
83 | 310fbb64 | Iustin Pop | try:
|
84 | 310fbb64 | Iustin Pop | utils.ReadFile(path, size=_DEVICE_READ_SIZE) |
85 | 310fbb64 | Iustin Pop | return True |
86 | 1122eb25 | Iustin Pop | except EnvironmentError: |
87 | 310fbb64 | Iustin Pop | logging.warning("Can't read from device %s", path, exc_info=True) |
88 | 310fbb64 | Iustin Pop | return False |
89 | 310fbb64 | Iustin Pop | |
90 | 310fbb64 | Iustin Pop | |
91 | a8083063 | Iustin Pop | class BlockDev(object): |
92 | a8083063 | Iustin Pop | """Block device abstract class.
|
93 | a8083063 | Iustin Pop |
|
94 | a8083063 | Iustin Pop | A block device can be in the following states:
|
95 | a8083063 | Iustin Pop | - not existing on the system, and by `Create()` it goes into:
|
96 | a8083063 | Iustin Pop | - existing but not setup/not active, and by `Assemble()` goes into:
|
97 | a8083063 | Iustin Pop | - active read-write and by `Open()` it goes into
|
98 | a8083063 | Iustin Pop | - online (=used, or ready for use)
|
99 | a8083063 | Iustin Pop |
|
100 | a8083063 | Iustin Pop | A device can also be online but read-only, however we are not using
|
101 | abdf0113 | Iustin Pop | the readonly state (LV has it, if needed in the future) and we are
|
102 | abdf0113 | Iustin Pop | usually looking at this like at a stack, so it's easier to
|
103 | abdf0113 | Iustin Pop | conceptualise the transition from not-existing to online and back
|
104 | a8083063 | Iustin Pop | like a linear one.
|
105 | a8083063 | Iustin Pop |
|
106 | a8083063 | Iustin Pop | The many different states of the device are due to the fact that we
|
107 | a8083063 | Iustin Pop | need to cover many device types:
|
108 | a8083063 | Iustin Pop | - logical volumes are created, lvchange -a y $lv, and used
|
109 | a8083063 | Iustin Pop | - drbd devices are attached to a local disk/remote peer and made primary
|
110 | a8083063 | Iustin Pop |
|
111 | a8083063 | Iustin Pop | A block device is identified by three items:
|
112 | a8083063 | Iustin Pop | - the /dev path of the device (dynamic)
|
113 | a8083063 | Iustin Pop | - a unique ID of the device (static)
|
114 | a8083063 | Iustin Pop | - it's major/minor pair (dynamic)
|
115 | a8083063 | Iustin Pop |
|
116 | a8083063 | Iustin Pop | Not all devices implement both the first two as distinct items. LVM
|
117 | a8083063 | Iustin Pop | logical volumes have their unique ID (the pair volume group, logical
|
118 | abdf0113 | Iustin Pop | volume name) in a 1-to-1 relation to the dev path. For DRBD devices,
|
119 | abdf0113 | Iustin Pop | the /dev path is again dynamic and the unique id is the pair (host1,
|
120 | abdf0113 | Iustin Pop | dev1), (host2, dev2).
|
121 | a8083063 | Iustin Pop |
|
122 | a8083063 | Iustin Pop | You can get to a device in two ways:
|
123 | a8083063 | Iustin Pop | - creating the (real) device, which returns you
|
124 | abdf0113 | Iustin Pop | an attached instance (lvcreate)
|
125 | a8083063 | Iustin Pop | - attaching of a python instance to an existing (real) device
|
126 | a8083063 | Iustin Pop |
|
127 | a8083063 | Iustin Pop | The second point, the attachement to a device, is different
|
128 | a8083063 | Iustin Pop | depending on whether the device is assembled or not. At init() time,
|
129 | a8083063 | Iustin Pop | we search for a device with the same unique_id as us. If found,
|
130 | a8083063 | Iustin Pop | good. It also means that the device is already assembled. If not,
|
131 | a8083063 | Iustin Pop | after assembly we'll have our correct major/minor.
|
132 | a8083063 | Iustin Pop |
|
133 | a8083063 | Iustin Pop | """
|
134 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
135 | a8083063 | Iustin Pop | self._children = children
|
136 | a8083063 | Iustin Pop | self.dev_path = None |
137 | a8083063 | Iustin Pop | self.unique_id = unique_id
|
138 | a8083063 | Iustin Pop | self.major = None |
139 | a8083063 | Iustin Pop | self.minor = None |
140 | cb999543 | Iustin Pop | self.attached = False |
141 | 464f8daf | Iustin Pop | self.size = size
|
142 | 94dcbdb0 | Andrea Spadaccini | self.params = params
|
143 | a8083063 | Iustin Pop | |
144 | a8083063 | Iustin Pop | def Assemble(self): |
145 | a8083063 | Iustin Pop | """Assemble the device from its components.
|
146 | a8083063 | Iustin Pop |
|
147 | f87548b5 | Iustin Pop | Implementations of this method by child classes must ensure that:
|
148 | f87548b5 | Iustin Pop | - after the device has been assembled, it knows its major/minor
|
149 | f87548b5 | Iustin Pop | numbers; this allows other devices (usually parents) to probe
|
150 | f87548b5 | Iustin Pop | correctly for their children
|
151 | f87548b5 | Iustin Pop | - calling this method on an existing, in-use device is safe
|
152 | f87548b5 | Iustin Pop | - if the device is already configured (and in an OK state),
|
153 | f87548b5 | Iustin Pop | this method is idempotent
|
154 | a8083063 | Iustin Pop |
|
155 | a8083063 | Iustin Pop | """
|
156 | 1063abd1 | Iustin Pop | pass
|
157 | a8083063 | Iustin Pop | |
158 | a8083063 | Iustin Pop | def Attach(self): |
159 | a8083063 | Iustin Pop | """Find a device which matches our config and attach to it.
|
160 | a8083063 | Iustin Pop |
|
161 | a8083063 | Iustin Pop | """
|
162 | a8083063 | Iustin Pop | raise NotImplementedError |
163 | a8083063 | Iustin Pop | |
164 | a8083063 | Iustin Pop | def Close(self): |
165 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
166 | a8083063 | Iustin Pop |
|
167 | a8083063 | Iustin Pop | """
|
168 | a8083063 | Iustin Pop | raise NotImplementedError |
169 | a8083063 | Iustin Pop | |
170 | a8083063 | Iustin Pop | @classmethod
|
171 | 94dcbdb0 | Andrea Spadaccini | def Create(cls, unique_id, children, size, params): |
172 | a8083063 | Iustin Pop | """Create the device.
|
173 | a8083063 | Iustin Pop |
|
174 | a8083063 | Iustin Pop | If the device cannot be created, it will return None
|
175 | a8083063 | Iustin Pop | instead. Error messages go to the logging system.
|
176 | a8083063 | Iustin Pop |
|
177 | a8083063 | Iustin Pop | Note that for some devices, the unique_id is used, and for other,
|
178 | a8083063 | Iustin Pop | the children. The idea is that these two, taken together, are
|
179 | a8083063 | Iustin Pop | enough for both creation and assembly (later).
|
180 | a8083063 | Iustin Pop |
|
181 | a8083063 | Iustin Pop | """
|
182 | a8083063 | Iustin Pop | raise NotImplementedError |
183 | a8083063 | Iustin Pop | |
184 | a8083063 | Iustin Pop | def Remove(self): |
185 | a8083063 | Iustin Pop | """Remove this device.
|
186 | a8083063 | Iustin Pop |
|
187 | abdf0113 | Iustin Pop | This makes sense only for some of the device types: LV and file
|
188 | 5bbd3f7f | Michael Hanselmann | storage. Also note that if the device can't attach, the removal
|
189 | abdf0113 | Iustin Pop | can't be completed.
|
190 | a8083063 | Iustin Pop |
|
191 | a8083063 | Iustin Pop | """
|
192 | a8083063 | Iustin Pop | raise NotImplementedError |
193 | a8083063 | Iustin Pop | |
194 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
195 | f3e513ad | Iustin Pop | """Rename this device.
|
196 | f3e513ad | Iustin Pop |
|
197 | f3e513ad | Iustin Pop | This may or may not make sense for a given device type.
|
198 | f3e513ad | Iustin Pop |
|
199 | f3e513ad | Iustin Pop | """
|
200 | f3e513ad | Iustin Pop | raise NotImplementedError |
201 | f3e513ad | Iustin Pop | |
202 | a8083063 | Iustin Pop | def Open(self, force=False): |
203 | a8083063 | Iustin Pop | """Make the device ready for use.
|
204 | a8083063 | Iustin Pop |
|
205 | a8083063 | Iustin Pop | This makes the device ready for I/O. For now, just the DRBD
|
206 | a8083063 | Iustin Pop | devices need this.
|
207 | a8083063 | Iustin Pop |
|
208 | a8083063 | Iustin Pop | The force parameter signifies that if the device has any kind of
|
209 | a8083063 | Iustin Pop | --force thing, it should be used, we know what we are doing.
|
210 | a8083063 | Iustin Pop |
|
211 | a8083063 | Iustin Pop | """
|
212 | a8083063 | Iustin Pop | raise NotImplementedError |
213 | a8083063 | Iustin Pop | |
214 | a8083063 | Iustin Pop | def Shutdown(self): |
215 | a8083063 | Iustin Pop | """Shut down the device, freeing its children.
|
216 | a8083063 | Iustin Pop |
|
217 | a8083063 | Iustin Pop | This undoes the `Assemble()` work, except for the child
|
218 | a8083063 | Iustin Pop | assembling; as such, the children on the device are still
|
219 | a8083063 | Iustin Pop | assembled after this call.
|
220 | a8083063 | Iustin Pop |
|
221 | a8083063 | Iustin Pop | """
|
222 | a8083063 | Iustin Pop | raise NotImplementedError |
223 | a8083063 | Iustin Pop | |
224 | f2f57b6e | Andrea Spadaccini | def SetSyncParams(self, params): |
225 | f2f57b6e | Andrea Spadaccini | """Adjust the synchronization parameters of the mirror.
|
226 | a8083063 | Iustin Pop |
|
227 | a8083063 | Iustin Pop | In case this is not a mirroring device, this is no-op.
|
228 | a8083063 | Iustin Pop |
|
229 | f2f57b6e | Andrea Spadaccini | @param params: dictionary of LD level disk parameters related to the
|
230 | f2f57b6e | Andrea Spadaccini | synchronization.
|
231 | f2f57b6e | Andrea Spadaccini |
|
232 | a8083063 | Iustin Pop | """
|
233 | a8083063 | Iustin Pop | result = True
|
234 | a8083063 | Iustin Pop | if self._children: |
235 | a8083063 | Iustin Pop | for child in self._children: |
236 | f2f57b6e | Andrea Spadaccini | result = result and child.SetSyncParams(params)
|
237 | a8083063 | Iustin Pop | return result
|
238 | a8083063 | Iustin Pop | |
239 | a3fffcc6 | Renรฉ Nussbaumer | def PauseResumeSync(self, pause): |
240 | a3fffcc6 | Renรฉ Nussbaumer | """Pause/Resume the sync of the mirror.
|
241 | a3fffcc6 | Renรฉ Nussbaumer |
|
242 | a3fffcc6 | Renรฉ Nussbaumer | In case this is not a mirroring device, this is no-op.
|
243 | a3fffcc6 | Renรฉ Nussbaumer |
|
244 | f2f57b6e | Andrea Spadaccini | @param pause: Whether to pause or resume
|
245 | a3fffcc6 | Renรฉ Nussbaumer |
|
246 | a3fffcc6 | Renรฉ Nussbaumer | """
|
247 | a3fffcc6 | Renรฉ Nussbaumer | result = True
|
248 | a3fffcc6 | Renรฉ Nussbaumer | if self._children: |
249 | a3fffcc6 | Renรฉ Nussbaumer | for child in self._children: |
250 | a3fffcc6 | Renรฉ Nussbaumer | result = result and child.PauseResumeSync(pause)
|
251 | a3fffcc6 | Renรฉ Nussbaumer | return result
|
252 | a3fffcc6 | Renรฉ Nussbaumer | |
253 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
254 | a8083063 | Iustin Pop | """Returns the sync status of the device.
|
255 | a8083063 | Iustin Pop |
|
256 | a8083063 | Iustin Pop | If this device is a mirroring device, this function returns the
|
257 | a8083063 | Iustin Pop | status of the mirror.
|
258 | a8083063 | Iustin Pop |
|
259 | 0834c866 | Iustin Pop | If sync_percent is None, it means the device is not syncing.
|
260 | a8083063 | Iustin Pop |
|
261 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't estimate
|
262 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
|
263 | 0834c866 | Iustin Pop |
|
264 | a8083063 | Iustin Pop | If is_degraded is True, it means the device is missing
|
265 | a8083063 | Iustin Pop | redundancy. This is usually a sign that something went wrong in
|
266 | a8083063 | Iustin Pop | the device setup, if sync_percent is None.
|
267 | a8083063 | Iustin Pop |
|
268 | 0834c866 | Iustin Pop | The ldisk parameter represents the degradation of the local
|
269 | 0834c866 | Iustin Pop | data. This is only valid for some devices, the rest will always
|
270 | 0834c866 | Iustin Pop | return False (not degraded).
|
271 | 0834c866 | Iustin Pop |
|
272 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
273 | c41eea6e | Iustin Pop |
|
274 | a8083063 | Iustin Pop | """
|
275 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
276 | 96acbc09 | Michael Hanselmann | major=self.major,
|
277 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
278 | 96acbc09 | Michael Hanselmann | sync_percent=None,
|
279 | 96acbc09 | Michael Hanselmann | estimated_time=None,
|
280 | 96acbc09 | Michael Hanselmann | is_degraded=False,
|
281 | f208978a | Michael Hanselmann | ldisk_status=constants.LDS_OKAY) |
282 | a8083063 | Iustin Pop | |
283 | a8083063 | Iustin Pop | def CombinedSyncStatus(self): |
284 | a8083063 | Iustin Pop | """Calculate the mirror status recursively for our children.
|
285 | a8083063 | Iustin Pop |
|
286 | a8083063 | Iustin Pop | The return value is the same as for `GetSyncStatus()` except the
|
287 | a8083063 | Iustin Pop | minimum percent and maximum time are calculated across our
|
288 | a8083063 | Iustin Pop | children.
|
289 | a8083063 | Iustin Pop |
|
290 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
291 | 96acbc09 | Michael Hanselmann |
|
292 | a8083063 | Iustin Pop | """
|
293 | 96acbc09 | Michael Hanselmann | status = self.GetSyncStatus()
|
294 | 96acbc09 | Michael Hanselmann | |
295 | 96acbc09 | Michael Hanselmann | min_percent = status.sync_percent |
296 | 96acbc09 | Michael Hanselmann | max_time = status.estimated_time |
297 | 96acbc09 | Michael Hanselmann | is_degraded = status.is_degraded |
298 | f208978a | Michael Hanselmann | ldisk_status = status.ldisk_status |
299 | 96acbc09 | Michael Hanselmann | |
300 | a8083063 | Iustin Pop | if self._children: |
301 | a8083063 | Iustin Pop | for child in self._children: |
302 | 96acbc09 | Michael Hanselmann | child_status = child.GetSyncStatus() |
303 | 96acbc09 | Michael Hanselmann | |
304 | a8083063 | Iustin Pop | if min_percent is None: |
305 | 96acbc09 | Michael Hanselmann | min_percent = child_status.sync_percent |
306 | 96acbc09 | Michael Hanselmann | elif child_status.sync_percent is not None: |
307 | 96acbc09 | Michael Hanselmann | min_percent = min(min_percent, child_status.sync_percent)
|
308 | 96acbc09 | Michael Hanselmann | |
309 | a8083063 | Iustin Pop | if max_time is None: |
310 | 96acbc09 | Michael Hanselmann | max_time = child_status.estimated_time |
311 | 96acbc09 | Michael Hanselmann | elif child_status.estimated_time is not None: |
312 | 96acbc09 | Michael Hanselmann | max_time = max(max_time, child_status.estimated_time)
|
313 | 96acbc09 | Michael Hanselmann | |
314 | 96acbc09 | Michael Hanselmann | is_degraded = is_degraded or child_status.is_degraded
|
315 | f208978a | Michael Hanselmann | |
316 | f208978a | Michael Hanselmann | if ldisk_status is None: |
317 | f208978a | Michael Hanselmann | ldisk_status = child_status.ldisk_status |
318 | f208978a | Michael Hanselmann | elif child_status.ldisk_status is not None: |
319 | f208978a | Michael Hanselmann | ldisk_status = max(ldisk_status, child_status.ldisk_status)
|
320 | 96acbc09 | Michael Hanselmann | |
321 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
322 | 96acbc09 | Michael Hanselmann | major=self.major,
|
323 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
324 | 96acbc09 | Michael Hanselmann | sync_percent=min_percent, |
325 | 96acbc09 | Michael Hanselmann | estimated_time=max_time, |
326 | 96acbc09 | Michael Hanselmann | is_degraded=is_degraded, |
327 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
328 | a8083063 | Iustin Pop | |
329 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
330 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
331 | a0c3fea1 | Michael Hanselmann |
|
332 | a0c3fea1 | Michael Hanselmann | Only supported for some device types.
|
333 | a0c3fea1 | Michael Hanselmann |
|
334 | a0c3fea1 | Michael Hanselmann | """
|
335 | a0c3fea1 | Michael Hanselmann | for child in self._children: |
336 | a0c3fea1 | Michael Hanselmann | child.SetInfo(text) |
337 | a0c3fea1 | Michael Hanselmann | |
338 | 7fe23d47 | Iustin Pop | def Grow(self, amount, dryrun): |
339 | 1005d816 | Iustin Pop | """Grow the block device.
|
340 | 1005d816 | Iustin Pop |
|
341 | 7fe23d47 | Iustin Pop | @type amount: integer
|
342 | c41eea6e | Iustin Pop | @param amount: the amount (in mebibytes) to grow with
|
343 | 7fe23d47 | Iustin Pop | @type dryrun: boolean
|
344 | 7fe23d47 | Iustin Pop | @param dryrun: whether to execute the operation in simulation mode
|
345 | 7fe23d47 | Iustin Pop | only, without actually increasing the size
|
346 | 1005d816 | Iustin Pop |
|
347 | 1005d816 | Iustin Pop | """
|
348 | 1005d816 | Iustin Pop | raise NotImplementedError |
349 | a0c3fea1 | Michael Hanselmann | |
350 | fcff3897 | Iustin Pop | def GetActualSize(self): |
351 | fcff3897 | Iustin Pop | """Return the actual disk size.
|
352 | fcff3897 | Iustin Pop |
|
353 | fcff3897 | Iustin Pop | @note: the device needs to be active when this is called
|
354 | fcff3897 | Iustin Pop |
|
355 | fcff3897 | Iustin Pop | """
|
356 | fcff3897 | Iustin Pop | assert self.attached, "BlockDevice not attached in GetActualSize()" |
357 | fcff3897 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize64", self.dev_path]) |
358 | fcff3897 | Iustin Pop | if result.failed:
|
359 | fcff3897 | Iustin Pop | _ThrowError("blockdev failed (%s): %s",
|
360 | fcff3897 | Iustin Pop | result.fail_reason, result.output) |
361 | fcff3897 | Iustin Pop | try:
|
362 | fcff3897 | Iustin Pop | sz = int(result.output.strip())
|
363 | fcff3897 | Iustin Pop | except (ValueError, TypeError), err: |
364 | fcff3897 | Iustin Pop | _ThrowError("Failed to parse blockdev output: %s", str(err)) |
365 | fcff3897 | Iustin Pop | return sz
|
366 | fcff3897 | Iustin Pop | |
367 | a8083063 | Iustin Pop | def __repr__(self): |
368 | a8083063 | Iustin Pop | return ("<%s: unique_id: %s, children: %s, %s:%s, %s>" % |
369 | a8083063 | Iustin Pop | (self.__class__, self.unique_id, self._children, |
370 | a8083063 | Iustin Pop | self.major, self.minor, self.dev_path)) |
371 | a8083063 | Iustin Pop | |
372 | a8083063 | Iustin Pop | |
373 | a8083063 | Iustin Pop | class LogicalVolume(BlockDev): |
374 | a8083063 | Iustin Pop | """Logical Volume block device.
|
375 | a8083063 | Iustin Pop |
|
376 | a8083063 | Iustin Pop | """
|
377 | 6136f8f0 | Iustin Pop | _VALID_NAME_RE = re.compile("^[a-zA-Z0-9+_.-]*$")
|
378 | 6136f8f0 | Iustin Pop | _INVALID_NAMES = frozenset([".", "..", "snapshot", "pvmove"]) |
379 | 6136f8f0 | Iustin Pop | _INVALID_SUBSTRINGS = frozenset(["_mlog", "_mimage"]) |
380 | 6136f8f0 | Iustin Pop | |
381 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
382 | a8083063 | Iustin Pop | """Attaches to a LV device.
|
383 | a8083063 | Iustin Pop |
|
384 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
|
385 | a8083063 | Iustin Pop |
|
386 | a8083063 | Iustin Pop | """
|
387 | 94dcbdb0 | Andrea Spadaccini | super(LogicalVolume, self).__init__(unique_id, children, size, params) |
388 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
389 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
390 | a8083063 | Iustin Pop | self._vg_name, self._lv_name = unique_id |
391 | 6136f8f0 | Iustin Pop | self._ValidateName(self._vg_name) |
392 | 6136f8f0 | Iustin Pop | self._ValidateName(self._lv_name) |
393 | 6136f8f0 | Iustin Pop | self.dev_path = utils.PathJoin("/dev", self._vg_name, self._lv_name) |
394 | 99e8295c | Iustin Pop | self._degraded = True |
395 | 38256320 | Iustin Pop | self.major = self.minor = self.pe_size = self.stripe_count = None |
396 | a8083063 | Iustin Pop | self.Attach()
|
397 | a8083063 | Iustin Pop | |
398 | a8083063 | Iustin Pop | @classmethod
|
399 | 94dcbdb0 | Andrea Spadaccini | def Create(cls, unique_id, children, size, params): |
400 | a8083063 | Iustin Pop | """Create a new logical volume.
|
401 | a8083063 | Iustin Pop |
|
402 | a8083063 | Iustin Pop | """
|
403 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
404 | 6c626518 | Iustin Pop | raise errors.ProgrammerError("Invalid configuration data %s" % |
405 | 6c626518 | Iustin Pop | str(unique_id))
|
406 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
407 | 6136f8f0 | Iustin Pop | cls._ValidateName(vg_name) |
408 | 6136f8f0 | Iustin Pop | cls._ValidateName(lv_name) |
409 | 2070598f | Iustin Pop | pvs_info = cls.GetPVInfo([vg_name]) |
410 | a8083063 | Iustin Pop | if not pvs_info: |
411 | 82463074 | Iustin Pop | _ThrowError("Can't compute PV info for vg %s", vg_name)
|
412 | a8083063 | Iustin Pop | pvs_info.sort() |
413 | a8083063 | Iustin Pop | pvs_info.reverse() |
414 | 5b7b5d49 | Guido Trotter | |
415 | e687ec01 | Michael Hanselmann | pvlist = [pv[1] for pv in pvs_info] |
416 | 403f5172 | Guido Trotter | if compat.any(":" in v for v in pvlist): |
417 | 01b6558a | Iustin Pop | _ThrowError("Some of your PVs have the invalid character ':' in their"
|
418 | 01b6558a | Iustin Pop | " name, this is not supported - please filter them out"
|
419 | 01b6558a | Iustin Pop | " in lvm.conf using either 'filter' or 'preferred_names'")
|
420 | e687ec01 | Michael Hanselmann | free_size = sum([pv[0] for pv in pvs_info]) |
421 | fecbe9d5 | Iustin Pop | current_pvs = len(pvlist)
|
422 | ac00bf1b | Andrea Spadaccini | desired_stripes = params[constants.LDP_STRIPES] |
423 | 43e11798 | Andrea Spadaccini | stripes = min(current_pvs, desired_stripes)
|
424 | 43e11798 | Andrea Spadaccini | if stripes < desired_stripes:
|
425 | 43e11798 | Andrea Spadaccini | logging.warning("Could not use %d stripes for VG %s, as only %d PVs are"
|
426 | 43e11798 | Andrea Spadaccini | " available.", desired_stripes, vg_name, current_pvs)
|
427 | 5b7b5d49 | Guido Trotter | |
428 | 5b7b5d49 | Guido Trotter | # The size constraint should have been checked from the master before
|
429 | 5b7b5d49 | Guido Trotter | # calling the create function.
|
430 | a8083063 | Iustin Pop | if free_size < size:
|
431 | 82463074 | Iustin Pop | _ThrowError("Not enough free space: required %s,"
|
432 | 82463074 | Iustin Pop | " available %s", size, free_size)
|
433 | fecbe9d5 | Iustin Pop | cmd = ["lvcreate", "-L%dm" % size, "-n%s" % lv_name] |
434 | fecbe9d5 | Iustin Pop | # If the free space is not well distributed, we won't be able to
|
435 | fecbe9d5 | Iustin Pop | # create an optimally-striped volume; in that case, we want to try
|
436 | fecbe9d5 | Iustin Pop | # with N, N-1, ..., 2, and finally 1 (non-stripped) number of
|
437 | fecbe9d5 | Iustin Pop | # stripes
|
438 | fecbe9d5 | Iustin Pop | for stripes_arg in range(stripes, 0, -1): |
439 | fecbe9d5 | Iustin Pop | result = utils.RunCmd(cmd + ["-i%d" % stripes_arg] + [vg_name] + pvlist)
|
440 | fecbe9d5 | Iustin Pop | if not result.failed: |
441 | fecbe9d5 | Iustin Pop | break
|
442 | a8083063 | Iustin Pop | if result.failed:
|
443 | 82463074 | Iustin Pop | _ThrowError("LV create failed (%s): %s",
|
444 | 82463074 | Iustin Pop | result.fail_reason, result.output) |
445 | 94dcbdb0 | Andrea Spadaccini | return LogicalVolume(unique_id, children, size, params)
|
446 | a8083063 | Iustin Pop | |
447 | a8083063 | Iustin Pop | @staticmethod
|
448 | 197478f2 | Renรฉ Nussbaumer | def _GetVolumeInfo(lvm_cmd, fields): |
449 | 197478f2 | Renรฉ Nussbaumer | """Returns LVM Volumen infos using lvm_cmd
|
450 | 197478f2 | Renรฉ Nussbaumer |
|
451 | 197478f2 | Renรฉ Nussbaumer | @param lvm_cmd: Should be one of "pvs", "vgs" or "lvs"
|
452 | 197478f2 | Renรฉ Nussbaumer | @param fields: Fields to return
|
453 | 197478f2 | Renรฉ Nussbaumer | @return: A list of dicts each with the parsed fields
|
454 | 197478f2 | Renรฉ Nussbaumer |
|
455 | 197478f2 | Renรฉ Nussbaumer | """
|
456 | 197478f2 | Renรฉ Nussbaumer | if not fields: |
457 | 197478f2 | Renรฉ Nussbaumer | raise errors.ProgrammerError("No fields specified") |
458 | 197478f2 | Renรฉ Nussbaumer | |
459 | 197478f2 | Renรฉ Nussbaumer | sep = "|"
|
460 | 197478f2 | Renรฉ Nussbaumer | cmd = [lvm_cmd, "--noheadings", "--nosuffix", "--units=m", "--unbuffered", |
461 | 197478f2 | Renรฉ Nussbaumer | "--separator=%s" % sep, "-o%s" % ",".join(fields)] |
462 | 197478f2 | Renรฉ Nussbaumer | |
463 | 197478f2 | Renรฉ Nussbaumer | result = utils.RunCmd(cmd) |
464 | 197478f2 | Renรฉ Nussbaumer | if result.failed:
|
465 | 197478f2 | Renรฉ Nussbaumer | raise errors.CommandError("Can't get the volume information: %s - %s" % |
466 | 197478f2 | Renรฉ Nussbaumer | (result.fail_reason, result.output)) |
467 | 197478f2 | Renรฉ Nussbaumer | |
468 | 197478f2 | Renรฉ Nussbaumer | data = [] |
469 | 197478f2 | Renรฉ Nussbaumer | for line in result.stdout.splitlines(): |
470 | 197478f2 | Renรฉ Nussbaumer | splitted_fields = line.strip().split(sep) |
471 | 197478f2 | Renรฉ Nussbaumer | |
472 | 197478f2 | Renรฉ Nussbaumer | if len(fields) != len(splitted_fields): |
473 | 197478f2 | Renรฉ Nussbaumer | raise errors.CommandError("Can't parse %s output: line '%s'" % |
474 | 197478f2 | Renรฉ Nussbaumer | (lvm_cmd, line)) |
475 | 197478f2 | Renรฉ Nussbaumer | |
476 | 197478f2 | Renรฉ Nussbaumer | data.append(splitted_fields) |
477 | 197478f2 | Renรฉ Nussbaumer | |
478 | 197478f2 | Renรฉ Nussbaumer | return data
|
479 | 197478f2 | Renรฉ Nussbaumer | |
480 | 197478f2 | Renรฉ Nussbaumer | @classmethod
|
481 | 197478f2 | Renรฉ Nussbaumer | def GetPVInfo(cls, vg_names, filter_allocatable=True): |
482 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
|
483 | a8083063 | Iustin Pop |
|
484 | 2070598f | Iustin Pop | @param vg_names: list of volume group names, if empty all will be returned
|
485 | 2070598f | Iustin Pop | @param filter_allocatable: whether to skip over unallocatable PVs
|
486 | a8083063 | Iustin Pop |
|
487 | c41eea6e | Iustin Pop | @rtype: list
|
488 | c41eea6e | Iustin Pop | @return: list of tuples (free_space, name) with free_space in mebibytes
|
489 | 098c0958 | Michael Hanselmann |
|
490 | a8083063 | Iustin Pop | """
|
491 | 197478f2 | Renรฉ Nussbaumer | try:
|
492 | 197478f2 | Renรฉ Nussbaumer | info = cls._GetVolumeInfo("pvs", ["pv_name", "vg_name", "pv_free", |
493 | 197478f2 | Renรฉ Nussbaumer | "pv_attr"])
|
494 | 197478f2 | Renรฉ Nussbaumer | except errors.GenericError, err:
|
495 | 197478f2 | Renรฉ Nussbaumer | logging.error("Can't get PV information: %s", err)
|
496 | a8083063 | Iustin Pop | return None |
497 | 197478f2 | Renรฉ Nussbaumer | |
498 | a8083063 | Iustin Pop | data = [] |
499 | 197478f2 | Renรฉ Nussbaumer | for pv_name, vg_name, pv_free, pv_attr in info: |
500 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not allocatable
|
501 | 197478f2 | Renรฉ Nussbaumer | if filter_allocatable and pv_attr[0] != "a": |
502 | a8083063 | Iustin Pop | continue
|
503 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not in the right volume group(s)
|
504 | 197478f2 | Renรฉ Nussbaumer | if vg_names and vg_name not in vg_names: |
505 | 2070598f | Iustin Pop | continue
|
506 | 197478f2 | Renรฉ Nussbaumer | data.append((float(pv_free), pv_name, vg_name))
|
507 | 197478f2 | Renรฉ Nussbaumer | |
508 | 197478f2 | Renรฉ Nussbaumer | return data
|
509 | 197478f2 | Renรฉ Nussbaumer | |
510 | 197478f2 | Renรฉ Nussbaumer | @classmethod
|
511 | 197478f2 | Renรฉ Nussbaumer | def GetVGInfo(cls, vg_names, filter_readonly=True): |
512 | 197478f2 | Renรฉ Nussbaumer | """Get the free space info for specific VGs.
|
513 | 197478f2 | Renรฉ Nussbaumer |
|
514 | 197478f2 | Renรฉ Nussbaumer | @param vg_names: list of volume group names, if empty all will be returned
|
515 | 197478f2 | Renรฉ Nussbaumer | @param filter_readonly: whether to skip over readonly VGs
|
516 | 197478f2 | Renรฉ Nussbaumer |
|
517 | 197478f2 | Renรฉ Nussbaumer | @rtype: list
|
518 | 673cd9c4 | Renรฉ Nussbaumer | @return: list of tuples (free_space, total_size, name) with free_space in
|
519 | 673cd9c4 | Renรฉ Nussbaumer | MiB
|
520 | 197478f2 | Renรฉ Nussbaumer |
|
521 | 197478f2 | Renรฉ Nussbaumer | """
|
522 | 197478f2 | Renรฉ Nussbaumer | try:
|
523 | 673cd9c4 | Renรฉ Nussbaumer | info = cls._GetVolumeInfo("vgs", ["vg_name", "vg_free", "vg_attr", |
524 | 673cd9c4 | Renรฉ Nussbaumer | "vg_size"])
|
525 | 197478f2 | Renรฉ Nussbaumer | except errors.GenericError, err:
|
526 | 197478f2 | Renรฉ Nussbaumer | logging.error("Can't get VG information: %s", err)
|
527 | 197478f2 | Renรฉ Nussbaumer | return None |
528 | 197478f2 | Renรฉ Nussbaumer | |
529 | 197478f2 | Renรฉ Nussbaumer | data = [] |
530 | 673cd9c4 | Renรฉ Nussbaumer | for vg_name, vg_free, vg_attr, vg_size in info: |
531 | 197478f2 | Renรฉ Nussbaumer | # (possibly) skip over vgs which are not writable
|
532 | 197478f2 | Renรฉ Nussbaumer | if filter_readonly and vg_attr[0] == "r": |
533 | 197478f2 | Renรฉ Nussbaumer | continue
|
534 | 197478f2 | Renรฉ Nussbaumer | # (possibly) skip over vgs which are not in the right volume group(s)
|
535 | 197478f2 | Renรฉ Nussbaumer | if vg_names and vg_name not in vg_names: |
536 | 197478f2 | Renรฉ Nussbaumer | continue
|
537 | 673cd9c4 | Renรฉ Nussbaumer | data.append((float(vg_free), float(vg_size), vg_name)) |
538 | a8083063 | Iustin Pop | |
539 | a8083063 | Iustin Pop | return data
|
540 | a8083063 | Iustin Pop | |
541 | 6136f8f0 | Iustin Pop | @classmethod
|
542 | 6136f8f0 | Iustin Pop | def _ValidateName(cls, name): |
543 | 6136f8f0 | Iustin Pop | """Validates that a given name is valid as VG or LV name.
|
544 | 6136f8f0 | Iustin Pop |
|
545 | 6136f8f0 | Iustin Pop | The list of valid characters and restricted names is taken out of
|
546 | 6136f8f0 | Iustin Pop | the lvm(8) manpage, with the simplification that we enforce both
|
547 | 6136f8f0 | Iustin Pop | VG and LV restrictions on the names.
|
548 | 6136f8f0 | Iustin Pop |
|
549 | 6136f8f0 | Iustin Pop | """
|
550 | 6136f8f0 | Iustin Pop | if (not cls._VALID_NAME_RE.match(name) or |
551 | 6136f8f0 | Iustin Pop | name in cls._INVALID_NAMES or |
552 | 403f5172 | Guido Trotter | compat.any(substring in name for substring in cls._INVALID_SUBSTRINGS)): |
553 | 6136f8f0 | Iustin Pop | _ThrowError("Invalid LVM name '%s'", name)
|
554 | 6136f8f0 | Iustin Pop | |
555 | a8083063 | Iustin Pop | def Remove(self): |
556 | a8083063 | Iustin Pop | """Remove this logical volume.
|
557 | a8083063 | Iustin Pop |
|
558 | a8083063 | Iustin Pop | """
|
559 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
560 | a8083063 | Iustin Pop | # the LV does not exist
|
561 | 0c6c04ec | Iustin Pop | return
|
562 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
563 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
564 | a8083063 | Iustin Pop | if result.failed:
|
565 | 0c6c04ec | Iustin Pop | _ThrowError("Can't lvremove: %s - %s", result.fail_reason, result.output)
|
566 | a8083063 | Iustin Pop | |
567 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
568 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
569 | f3e513ad | Iustin Pop |
|
570 | f3e513ad | Iustin Pop | """
|
571 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
572 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
573 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
574 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
575 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
576 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
577 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
578 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
579 | f3e513ad | Iustin Pop | if result.failed:
|
580 | 82463074 | Iustin Pop | _ThrowError("Failed to rename the logical volume: %s", result.output)
|
581 | be345db0 | Iustin Pop | self._lv_name = new_name
|
582 | 6136f8f0 | Iustin Pop | self.dev_path = utils.PathJoin("/dev", self._vg_name, self._lv_name) |
583 | be345db0 | Iustin Pop | |
584 | a8083063 | Iustin Pop | def Attach(self): |
585 | a8083063 | Iustin Pop | """Attach to an existing LV.
|
586 | a8083063 | Iustin Pop |
|
587 | a8083063 | Iustin Pop | This method will try to see if an existing and active LV exists
|
588 | c99a3cc0 | Manuel Franceschini | which matches our name. If so, its major/minor will be
|
589 | a8083063 | Iustin Pop | recorded.
|
590 | a8083063 | Iustin Pop |
|
591 | a8083063 | Iustin Pop | """
|
592 | cb999543 | Iustin Pop | self.attached = False |
593 | 99e8295c | Iustin Pop | result = utils.RunCmd(["lvs", "--noheadings", "--separator=,", |
594 | 38256320 | Iustin Pop | "--units=m", "--nosuffix", |
595 | 38256320 | Iustin Pop | "-olv_attr,lv_kernel_major,lv_kernel_minor,"
|
596 | 38256320 | Iustin Pop | "vg_extent_size,stripes", self.dev_path]) |
597 | a8083063 | Iustin Pop | if result.failed:
|
598 | 468c5f77 | Iustin Pop | logging.error("Can't find LV %s: %s, %s",
|
599 | 468c5f77 | Iustin Pop | self.dev_path, result.fail_reason, result.output)
|
600 | a8083063 | Iustin Pop | return False |
601 | 38256320 | Iustin Pop | # the output can (and will) have multiple lines for multi-segment
|
602 | 38256320 | Iustin Pop | # LVs, as the 'stripes' parameter is a segment one, so we take
|
603 | 38256320 | Iustin Pop | # only the last entry, which is the one we're interested in; note
|
604 | 38256320 | Iustin Pop | # that with LVM2 anyway the 'stripes' value must be constant
|
605 | 38256320 | Iustin Pop | # across segments, so this is a no-op actually
|
606 | 38256320 | Iustin Pop | out = result.stdout.splitlines() |
607 | 38256320 | Iustin Pop | if not out: # totally empty result? splitlines() returns at least |
608 | 38256320 | Iustin Pop | # one line for any non-empty string
|
609 | 38256320 | Iustin Pop | logging.error("Can't parse LVS output, no lines? Got '%s'", str(out)) |
610 | 38256320 | Iustin Pop | return False |
611 | d0c8c01d | Iustin Pop | out = out[-1].strip().rstrip(",") |
612 | 99e8295c | Iustin Pop | out = out.split(",")
|
613 | 38256320 | Iustin Pop | if len(out) != 5: |
614 | 38256320 | Iustin Pop | logging.error("Can't parse LVS output, len(%s) != 5", str(out)) |
615 | 99e8295c | Iustin Pop | return False |
616 | 99e8295c | Iustin Pop | |
617 | 38256320 | Iustin Pop | status, major, minor, pe_size, stripes = out |
618 | 99e8295c | Iustin Pop | if len(status) != 6: |
619 | 468c5f77 | Iustin Pop | logging.error("lvs lv_attr is not 6 characters (%s)", status)
|
620 | 99e8295c | Iustin Pop | return False |
621 | 99e8295c | Iustin Pop | |
622 | 99e8295c | Iustin Pop | try:
|
623 | 99e8295c | Iustin Pop | major = int(major)
|
624 | 99e8295c | Iustin Pop | minor = int(minor)
|
625 | 691744c4 | Iustin Pop | except (TypeError, ValueError), err: |
626 | 468c5f77 | Iustin Pop | logging.error("lvs major/minor cannot be parsed: %s", str(err)) |
627 | 99e8295c | Iustin Pop | |
628 | 38256320 | Iustin Pop | try:
|
629 | 38256320 | Iustin Pop | pe_size = int(float(pe_size)) |
630 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
631 | 38256320 | Iustin Pop | logging.error("Can't parse vg extent size: %s", err)
|
632 | 38256320 | Iustin Pop | return False |
633 | 38256320 | Iustin Pop | |
634 | 38256320 | Iustin Pop | try:
|
635 | 38256320 | Iustin Pop | stripes = int(stripes)
|
636 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
637 | 38256320 | Iustin Pop | logging.error("Can't parse the number of stripes: %s", err)
|
638 | 38256320 | Iustin Pop | return False |
639 | 38256320 | Iustin Pop | |
640 | 99e8295c | Iustin Pop | self.major = major
|
641 | 99e8295c | Iustin Pop | self.minor = minor
|
642 | 38256320 | Iustin Pop | self.pe_size = pe_size
|
643 | 38256320 | Iustin Pop | self.stripe_count = stripes
|
644 | d0c8c01d | Iustin Pop | self._degraded = status[0] == "v" # virtual volume, i.e. doesn't backing |
645 | 99e8295c | Iustin Pop | # storage
|
646 | cb999543 | Iustin Pop | self.attached = True |
647 | 99e8295c | Iustin Pop | return True |
648 | a8083063 | Iustin Pop | |
649 | a8083063 | Iustin Pop | def Assemble(self): |
650 | a8083063 | Iustin Pop | """Assemble the device.
|
651 | a8083063 | Iustin Pop |
|
652 | 5bbd3f7f | Michael Hanselmann | We always run `lvchange -ay` on the LV to ensure it's active before
|
653 | 5574047a | Iustin Pop | use, as there were cases when xenvg was not active after boot
|
654 | 5574047a | Iustin Pop | (also possibly after disk issues).
|
655 | a8083063 | Iustin Pop |
|
656 | a8083063 | Iustin Pop | """
|
657 | 5574047a | Iustin Pop | result = utils.RunCmd(["lvchange", "-ay", self.dev_path]) |
658 | 5574047a | Iustin Pop | if result.failed:
|
659 | 1063abd1 | Iustin Pop | _ThrowError("Can't activate lv %s: %s", self.dev_path, result.output) |
660 | a8083063 | Iustin Pop | |
661 | a8083063 | Iustin Pop | def Shutdown(self): |
662 | a8083063 | Iustin Pop | """Shutdown the device.
|
663 | a8083063 | Iustin Pop |
|
664 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
665 | a8083063 | Iustin Pop | volumes on shutdown.
|
666 | a8083063 | Iustin Pop |
|
667 | a8083063 | Iustin Pop | """
|
668 | 746f7476 | Iustin Pop | pass
|
669 | a8083063 | Iustin Pop | |
670 | 9db6dbce | Iustin Pop | def GetSyncStatus(self): |
671 | 9db6dbce | Iustin Pop | """Returns the sync status of the device.
|
672 | 9db6dbce | Iustin Pop |
|
673 | 9db6dbce | Iustin Pop | If this device is a mirroring device, this function returns the
|
674 | 9db6dbce | Iustin Pop | status of the mirror.
|
675 | 9db6dbce | Iustin Pop |
|
676 | 9db6dbce | Iustin Pop | For logical volumes, sync_percent and estimated_time are always
|
677 | 9db6dbce | Iustin Pop | None (no recovery in progress, as we don't handle the mirrored LV
|
678 | 0834c866 | Iustin Pop | case). The is_degraded parameter is the inverse of the ldisk
|
679 | 0834c866 | Iustin Pop | parameter.
|
680 | 9db6dbce | Iustin Pop |
|
681 | 0834c866 | Iustin Pop | For the ldisk parameter, we check if the logical volume has the
|
682 | 0834c866 | Iustin Pop | 'virtual' type, which means it's not backed by existing storage
|
683 | 0834c866 | Iustin Pop | anymore (read from it return I/O error). This happens after a
|
684 | 0834c866 | Iustin Pop | physical disk failure and subsequent 'vgreduce --removemissing' on
|
685 | 0834c866 | Iustin Pop | the volume group.
|
686 | 9db6dbce | Iustin Pop |
|
687 | 99e8295c | Iustin Pop | The status was already read in Attach, so we just return it.
|
688 | 99e8295c | Iustin Pop |
|
689 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
690 | c41eea6e | Iustin Pop |
|
691 | 9db6dbce | Iustin Pop | """
|
692 | f208978a | Michael Hanselmann | if self._degraded: |
693 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_FAULTY |
694 | f208978a | Michael Hanselmann | else:
|
695 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_OKAY |
696 | f208978a | Michael Hanselmann | |
697 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
698 | 96acbc09 | Michael Hanselmann | major=self.major,
|
699 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
700 | 96acbc09 | Michael Hanselmann | sync_percent=None,
|
701 | 96acbc09 | Michael Hanselmann | estimated_time=None,
|
702 | 96acbc09 | Michael Hanselmann | is_degraded=self._degraded,
|
703 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
704 | 9db6dbce | Iustin Pop | |
705 | a8083063 | Iustin Pop | def Open(self, force=False): |
706 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
707 | a8083063 | Iustin Pop |
|
708 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
709 | a8083063 | Iustin Pop |
|
710 | a8083063 | Iustin Pop | """
|
711 | fdbd668d | Iustin Pop | pass
|
712 | a8083063 | Iustin Pop | |
713 | a8083063 | Iustin Pop | def Close(self): |
714 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
715 | a8083063 | Iustin Pop |
|
716 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
717 | a8083063 | Iustin Pop |
|
718 | a8083063 | Iustin Pop | """
|
719 | fdbd668d | Iustin Pop | pass
|
720 | a8083063 | Iustin Pop | |
721 | a8083063 | Iustin Pop | def Snapshot(self, size): |
722 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
723 | a8083063 | Iustin Pop |
|
724 | 800ac399 | Iustin Pop | @returns: tuple (vg, lv)
|
725 | 800ac399 | Iustin Pop |
|
726 | a8083063 | Iustin Pop | """
|
727 | a8083063 | Iustin Pop | snap_name = self._lv_name + ".snap" |
728 | a8083063 | Iustin Pop | |
729 | a8083063 | Iustin Pop | # remove existing snapshot if found
|
730 | 94dcbdb0 | Andrea Spadaccini | snap = LogicalVolume((self._vg_name, snap_name), None, size, self.params) |
731 | 0c6c04ec | Iustin Pop | _IgnoreError(snap.Remove) |
732 | a8083063 | Iustin Pop | |
733 | 197478f2 | Renรฉ Nussbaumer | vg_info = self.GetVGInfo([self._vg_name]) |
734 | 197478f2 | Renรฉ Nussbaumer | if not vg_info: |
735 | 197478f2 | Renรฉ Nussbaumer | _ThrowError("Can't compute VG info for vg %s", self._vg_name) |
736 | 673cd9c4 | Renรฉ Nussbaumer | free_size, _, _ = vg_info[0]
|
737 | a8083063 | Iustin Pop | if free_size < size:
|
738 | 82463074 | Iustin Pop | _ThrowError("Not enough free space: required %s,"
|
739 | 82463074 | Iustin Pop | " available %s", size, free_size)
|
740 | a8083063 | Iustin Pop | |
741 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
742 | a8083063 | Iustin Pop | "-n%s" % snap_name, self.dev_path]) |
743 | a8083063 | Iustin Pop | if result.failed:
|
744 | 82463074 | Iustin Pop | _ThrowError("command: %s error: %s - %s",
|
745 | 82463074 | Iustin Pop | result.cmd, result.fail_reason, result.output) |
746 | a8083063 | Iustin Pop | |
747 | 800ac399 | Iustin Pop | return (self._vg_name, snap_name) |
748 | a8083063 | Iustin Pop | |
749 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
750 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
751 | a0c3fea1 | Michael Hanselmann |
|
752 | a0c3fea1 | Michael Hanselmann | """
|
753 | a0c3fea1 | Michael Hanselmann | BlockDev.SetInfo(self, text)
|
754 | a0c3fea1 | Michael Hanselmann | |
755 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
756 | d0c8c01d | Iustin Pop | text = re.sub("^[^A-Za-z0-9_+.]", "_", text) |
757 | d0c8c01d | Iustin Pop | text = re.sub("[^-A-Za-z0-9_+.]", "_", text) |
758 | a0c3fea1 | Michael Hanselmann | |
759 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
760 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
761 | a0c3fea1 | Michael Hanselmann | |
762 | a0c3fea1 | Michael Hanselmann | result = utils.RunCmd(["lvchange", "--addtag", text, |
763 | a0c3fea1 | Michael Hanselmann | self.dev_path])
|
764 | a0c3fea1 | Michael Hanselmann | if result.failed:
|
765 | 82463074 | Iustin Pop | _ThrowError("Command: %s error: %s - %s", result.cmd, result.fail_reason,
|
766 | 82463074 | Iustin Pop | result.output) |
767 | 82463074 | Iustin Pop | |
768 | 7fe23d47 | Iustin Pop | def Grow(self, amount, dryrun): |
769 | 1005d816 | Iustin Pop | """Grow the logical volume.
|
770 | 1005d816 | Iustin Pop |
|
771 | 1005d816 | Iustin Pop | """
|
772 | 38256320 | Iustin Pop | if self.pe_size is None or self.stripe_count is None: |
773 | 38256320 | Iustin Pop | if not self.Attach(): |
774 | 38256320 | Iustin Pop | _ThrowError("Can't attach to LV during Grow()")
|
775 | 38256320 | Iustin Pop | full_stripe_size = self.pe_size * self.stripe_count |
776 | 38256320 | Iustin Pop | rest = amount % full_stripe_size |
777 | 38256320 | Iustin Pop | if rest != 0: |
778 | 38256320 | Iustin Pop | amount += full_stripe_size - rest |
779 | 7fe23d47 | Iustin Pop | cmd = ["lvextend", "-L", "+%dm" % amount] |
780 | 7fe23d47 | Iustin Pop | if dryrun:
|
781 | 7fe23d47 | Iustin Pop | cmd.append("--test")
|
782 | 1005d816 | Iustin Pop | # we try multiple algorithms since the 'best' ones might not have
|
783 | 1005d816 | Iustin Pop | # space available in the right place, but later ones might (since
|
784 | 1005d816 | Iustin Pop | # they have less constraints); also note that only recent LVM
|
785 | 1005d816 | Iustin Pop | # supports 'cling'
|
786 | 1005d816 | Iustin Pop | for alloc_policy in "contiguous", "cling", "normal": |
787 | 7fe23d47 | Iustin Pop | result = utils.RunCmd(cmd + ["--alloc", alloc_policy, self.dev_path]) |
788 | 1005d816 | Iustin Pop | if not result.failed: |
789 | 1005d816 | Iustin Pop | return
|
790 | 82463074 | Iustin Pop | _ThrowError("Can't grow LV %s: %s", self.dev_path, result.output) |
791 | a0c3fea1 | Michael Hanselmann | |
792 | a0c3fea1 | Michael Hanselmann | |
793 | 6b90c22e | Iustin Pop | class DRBD8Status(object): |
794 | 6b90c22e | Iustin Pop | """A DRBD status representation class.
|
795 | 6b90c22e | Iustin Pop |
|
796 | 6b90c22e | Iustin Pop | Note that this doesn't support unconfigured devices (cs:Unconfigured).
|
797 | 6b90c22e | Iustin Pop |
|
798 | 6b90c22e | Iustin Pop | """
|
799 | 767d52d3 | Iustin Pop | UNCONF_RE = re.compile(r"\s*[0-9]+:\s*cs:Unconfigured$")
|
800 | 01e2ce3a | Iustin Pop | LINE_RE = re.compile(r"\s*[0-9]+:\s*cs:(\S+)\s+(?:st|ro):([^/]+)/(\S+)"
|
801 | 6b90c22e | Iustin Pop | "\s+ds:([^/]+)/(\S+)\s+.*$")
|
802 | 6b90c22e | Iustin Pop | SYNC_RE = re.compile(r"^.*\ssync'ed:\s*([0-9.]+)%.*"
|
803 | 7a380ddf | Renรฉ Nussbaumer | # Due to a bug in drbd in the kernel, introduced in
|
804 | 7a380ddf | Renรฉ Nussbaumer | # commit 4b0715f096 (still unfixed as of 2011-08-22)
|
805 | 7a380ddf | Renรฉ Nussbaumer | "(?:\s|M)"
|
806 | 7a380ddf | Renรฉ Nussbaumer | "finish: ([0-9]+):([0-9]+):([0-9]+)\s.*$")
|
807 | 6b90c22e | Iustin Pop | |
808 | 3c003d9d | Iustin Pop | CS_UNCONFIGURED = "Unconfigured"
|
809 | 3c003d9d | Iustin Pop | CS_STANDALONE = "StandAlone"
|
810 | 3c003d9d | Iustin Pop | CS_WFCONNECTION = "WFConnection"
|
811 | 3c003d9d | Iustin Pop | CS_WFREPORTPARAMS = "WFReportParams"
|
812 | 3c003d9d | Iustin Pop | CS_CONNECTED = "Connected"
|
813 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCS = "StartingSyncS"
|
814 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCT = "StartingSyncT"
|
815 | 3c003d9d | Iustin Pop | CS_WFBITMAPS = "WFBitMapS"
|
816 | 3c003d9d | Iustin Pop | CS_WFBITMAPT = "WFBitMapT"
|
817 | 3c003d9d | Iustin Pop | CS_WFSYNCUUID = "WFSyncUUID"
|
818 | 3c003d9d | Iustin Pop | CS_SYNCSOURCE = "SyncSource"
|
819 | 3c003d9d | Iustin Pop | CS_SYNCTARGET = "SyncTarget"
|
820 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCS = "PausedSyncS"
|
821 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCT = "PausedSyncT"
|
822 | 3c003d9d | Iustin Pop | CSET_SYNC = frozenset([
|
823 | 3c003d9d | Iustin Pop | CS_WFREPORTPARAMS, |
824 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCS, |
825 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCT, |
826 | 3c003d9d | Iustin Pop | CS_WFBITMAPS, |
827 | 3c003d9d | Iustin Pop | CS_WFBITMAPT, |
828 | 3c003d9d | Iustin Pop | CS_WFSYNCUUID, |
829 | 3c003d9d | Iustin Pop | CS_SYNCSOURCE, |
830 | 3c003d9d | Iustin Pop | CS_SYNCTARGET, |
831 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCS, |
832 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCT, |
833 | 3c003d9d | Iustin Pop | ]) |
834 | 3c003d9d | Iustin Pop | |
835 | 3c003d9d | Iustin Pop | DS_DISKLESS = "Diskless"
|
836 | 3c003d9d | Iustin Pop | DS_ATTACHING = "Attaching" # transient state |
837 | 3c003d9d | Iustin Pop | DS_FAILED = "Failed" # transient state, next: diskless |
838 | 3c003d9d | Iustin Pop | DS_NEGOTIATING = "Negotiating" # transient state |
839 | 3c003d9d | Iustin Pop | DS_INCONSISTENT = "Inconsistent" # while syncing or after creation |
840 | 3c003d9d | Iustin Pop | DS_OUTDATED = "Outdated"
|
841 | 3c003d9d | Iustin Pop | DS_DUNKNOWN = "DUnknown" # shown for peer disk when not connected |
842 | 3c003d9d | Iustin Pop | DS_CONSISTENT = "Consistent"
|
843 | 3c003d9d | Iustin Pop | DS_UPTODATE = "UpToDate" # normal state |
844 | 3c003d9d | Iustin Pop | |
845 | 3c003d9d | Iustin Pop | RO_PRIMARY = "Primary"
|
846 | 3c003d9d | Iustin Pop | RO_SECONDARY = "Secondary"
|
847 | 3c003d9d | Iustin Pop | RO_UNKNOWN = "Unknown"
|
848 | 3c003d9d | Iustin Pop | |
849 | 6b90c22e | Iustin Pop | def __init__(self, procline): |
850 | 767d52d3 | Iustin Pop | u = self.UNCONF_RE.match(procline)
|
851 | 767d52d3 | Iustin Pop | if u:
|
852 | 3c003d9d | Iustin Pop | self.cstatus = self.CS_UNCONFIGURED |
853 | 767d52d3 | Iustin Pop | self.lrole = self.rrole = self.ldisk = self.rdisk = None |
854 | 767d52d3 | Iustin Pop | else:
|
855 | 767d52d3 | Iustin Pop | m = self.LINE_RE.match(procline)
|
856 | 767d52d3 | Iustin Pop | if not m: |
857 | 767d52d3 | Iustin Pop | raise errors.BlockDeviceError("Can't parse input data '%s'" % procline) |
858 | 767d52d3 | Iustin Pop | self.cstatus = m.group(1) |
859 | 767d52d3 | Iustin Pop | self.lrole = m.group(2) |
860 | 767d52d3 | Iustin Pop | self.rrole = m.group(3) |
861 | 767d52d3 | Iustin Pop | self.ldisk = m.group(4) |
862 | 767d52d3 | Iustin Pop | self.rdisk = m.group(5) |
863 | 767d52d3 | Iustin Pop | |
864 | 767d52d3 | Iustin Pop | # end reading of data from the LINE_RE or UNCONF_RE
|
865 | 6b90c22e | Iustin Pop | |
866 | 3c003d9d | Iustin Pop | self.is_standalone = self.cstatus == self.CS_STANDALONE |
867 | 3c003d9d | Iustin Pop | self.is_wfconn = self.cstatus == self.CS_WFCONNECTION |
868 | 3c003d9d | Iustin Pop | self.is_connected = self.cstatus == self.CS_CONNECTED |
869 | 3c003d9d | Iustin Pop | self.is_primary = self.lrole == self.RO_PRIMARY |
870 | 3c003d9d | Iustin Pop | self.is_secondary = self.lrole == self.RO_SECONDARY |
871 | 3c003d9d | Iustin Pop | self.peer_primary = self.rrole == self.RO_PRIMARY |
872 | 3c003d9d | Iustin Pop | self.peer_secondary = self.rrole == self.RO_SECONDARY |
873 | 6b90c22e | Iustin Pop | self.both_primary = self.is_primary and self.peer_primary |
874 | 6b90c22e | Iustin Pop | self.both_secondary = self.is_secondary and self.peer_secondary |
875 | 6b90c22e | Iustin Pop | |
876 | 3c003d9d | Iustin Pop | self.is_diskless = self.ldisk == self.DS_DISKLESS |
877 | 3c003d9d | Iustin Pop | self.is_disk_uptodate = self.ldisk == self.DS_UPTODATE |
878 | 6b90c22e | Iustin Pop | |
879 | 3c003d9d | Iustin Pop | self.is_in_resync = self.cstatus in self.CSET_SYNC |
880 | 3c003d9d | Iustin Pop | self.is_in_use = self.cstatus != self.CS_UNCONFIGURED |
881 | 6b93ec9d | Iustin Pop | |
882 | 6b90c22e | Iustin Pop | m = self.SYNC_RE.match(procline)
|
883 | 6b90c22e | Iustin Pop | if m:
|
884 | 6b90c22e | Iustin Pop | self.sync_percent = float(m.group(1)) |
885 | 6b90c22e | Iustin Pop | hours = int(m.group(2)) |
886 | 6b90c22e | Iustin Pop | minutes = int(m.group(3)) |
887 | 6b90c22e | Iustin Pop | seconds = int(m.group(4)) |
888 | 6b90c22e | Iustin Pop | self.est_time = hours * 3600 + minutes * 60 + seconds |
889 | 6b90c22e | Iustin Pop | else:
|
890 | 3c003d9d | Iustin Pop | # we have (in this if branch) no percent information, but if
|
891 | 3c003d9d | Iustin Pop | # we're resyncing we need to 'fake' a sync percent information,
|
892 | 3c003d9d | Iustin Pop | # as this is how cmdlib determines if it makes sense to wait for
|
893 | 3c003d9d | Iustin Pop | # resyncing or not
|
894 | 3c003d9d | Iustin Pop | if self.is_in_resync: |
895 | 3c003d9d | Iustin Pop | self.sync_percent = 0 |
896 | 3c003d9d | Iustin Pop | else:
|
897 | 3c003d9d | Iustin Pop | self.sync_percent = None |
898 | 6b90c22e | Iustin Pop | self.est_time = None |
899 | 6b90c22e | Iustin Pop | |
900 | 6b90c22e | Iustin Pop | |
901 | b459a848 | Andrea Spadaccini | class BaseDRBD(BlockDev): # pylint: disable=W0223 |
902 | 0f7f32d9 | Iustin Pop | """Base DRBD class.
|
903 | a8083063 | Iustin Pop |
|
904 | 0f7f32d9 | Iustin Pop | This class contains a few bits of common functionality between the
|
905 | 0f7f32d9 | Iustin Pop | 0.7 and 8.x versions of DRBD.
|
906 | 0f7f32d9 | Iustin Pop |
|
907 | abdf0113 | Iustin Pop | """
|
908 | fcee765d | Manuel Franceschini | _VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)(?:\.\d+)?"
|
909 | abdf0113 | Iustin Pop | r" \(api:(\d+)/proto:(\d+)(?:-(\d+))?\)")
|
910 | 9122e60a | Iustin Pop | _VALID_LINE_RE = re.compile("^ *([0-9]+): cs:([^ ]+).*$")
|
911 | 9122e60a | Iustin Pop | _UNUSED_LINE_RE = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
912 | a8083063 | Iustin Pop | |
913 | abdf0113 | Iustin Pop | _DRBD_MAJOR = 147
|
914 | abdf0113 | Iustin Pop | _ST_UNCONFIGURED = "Unconfigured"
|
915 | abdf0113 | Iustin Pop | _ST_WFCONNECTION = "WFConnection"
|
916 | abdf0113 | Iustin Pop | _ST_CONNECTED = "Connected"
|
917 | a8083063 | Iustin Pop | |
918 | 6b90c22e | Iustin Pop | _STATUS_FILE = "/proc/drbd"
|
919 | 549071a0 | Luca Bigliardi | _USERMODE_HELPER_FILE = "/sys/module/drbd/parameters/usermode_helper"
|
920 | 6b90c22e | Iustin Pop | |
921 | abdf0113 | Iustin Pop | @staticmethod
|
922 | 6b90c22e | Iustin Pop | def _GetProcData(filename=_STATUS_FILE): |
923 | abdf0113 | Iustin Pop | """Return data from /proc/drbd.
|
924 | a8083063 | Iustin Pop |
|
925 | a8083063 | Iustin Pop | """
|
926 | abdf0113 | Iustin Pop | try:
|
927 | 13998ef2 | Michael Hanselmann | data = utils.ReadFile(filename).splitlines() |
928 | f6eaed12 | Iustin Pop | except EnvironmentError, err: |
929 | f6eaed12 | Iustin Pop | if err.errno == errno.ENOENT:
|
930 | f6eaed12 | Iustin Pop | _ThrowError("The file %s cannot be opened, check if the module"
|
931 | f6eaed12 | Iustin Pop | " is loaded (%s)", filename, str(err)) |
932 | f6eaed12 | Iustin Pop | else:
|
933 | f6eaed12 | Iustin Pop | _ThrowError("Can't read the DRBD proc file %s: %s", filename, str(err)) |
934 | abdf0113 | Iustin Pop | if not data: |
935 | 82463074 | Iustin Pop | _ThrowError("Can't read any data from %s", filename)
|
936 | abdf0113 | Iustin Pop | return data
|
937 | a8083063 | Iustin Pop | |
938 | 9122e60a | Iustin Pop | @classmethod
|
939 | 9122e60a | Iustin Pop | def _MassageProcData(cls, data): |
940 | abdf0113 | Iustin Pop | """Transform the output of _GetProdData into a nicer form.
|
941 | a8083063 | Iustin Pop |
|
942 | c41eea6e | Iustin Pop | @return: a dictionary of minor: joined lines from /proc/drbd
|
943 | c41eea6e | Iustin Pop | for that minor
|
944 | a8083063 | Iustin Pop |
|
945 | a8083063 | Iustin Pop | """
|
946 | abdf0113 | Iustin Pop | results = {} |
947 | abdf0113 | Iustin Pop | old_minor = old_line = None
|
948 | abdf0113 | Iustin Pop | for line in data: |
949 | 67d101d4 | Iustin Pop | if not line: # completely empty lines, as can be returned by drbd8.0+ |
950 | 67d101d4 | Iustin Pop | continue
|
951 | 9122e60a | Iustin Pop | lresult = cls._VALID_LINE_RE.match(line) |
952 | abdf0113 | Iustin Pop | if lresult is not None: |
953 | abdf0113 | Iustin Pop | if old_minor is not None: |
954 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
955 | abdf0113 | Iustin Pop | old_minor = int(lresult.group(1)) |
956 | abdf0113 | Iustin Pop | old_line = line |
957 | abdf0113 | Iustin Pop | else:
|
958 | abdf0113 | Iustin Pop | if old_minor is not None: |
959 | abdf0113 | Iustin Pop | old_line += " " + line.strip()
|
960 | abdf0113 | Iustin Pop | # add last line
|
961 | abdf0113 | Iustin Pop | if old_minor is not None: |
962 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
963 | abdf0113 | Iustin Pop | return results
|
964 | a8083063 | Iustin Pop | |
965 | abdf0113 | Iustin Pop | @classmethod
|
966 | fcee765d | Manuel Franceschini | def _GetVersion(cls, proc_data): |
967 | abdf0113 | Iustin Pop | """Return the DRBD version.
|
968 | a8083063 | Iustin Pop |
|
969 | abdf0113 | Iustin Pop | This will return a dict with keys:
|
970 | c41eea6e | Iustin Pop | - k_major
|
971 | c41eea6e | Iustin Pop | - k_minor
|
972 | c41eea6e | Iustin Pop | - k_point
|
973 | c41eea6e | Iustin Pop | - api
|
974 | c41eea6e | Iustin Pop | - proto
|
975 | c41eea6e | Iustin Pop | - proto2 (only on drbd > 8.2.X)
|
976 | a8083063 | Iustin Pop |
|
977 | a8083063 | Iustin Pop | """
|
978 | abdf0113 | Iustin Pop | first_line = proc_data[0].strip()
|
979 | abdf0113 | Iustin Pop | version = cls._VERSION_RE.match(first_line) |
980 | abdf0113 | Iustin Pop | if not version: |
981 | abdf0113 | Iustin Pop | raise errors.BlockDeviceError("Can't parse DRBD version from '%s'" % |
982 | abdf0113 | Iustin Pop | first_line) |
983 | a8083063 | Iustin Pop | |
984 | abdf0113 | Iustin Pop | values = version.groups() |
985 | d0c8c01d | Iustin Pop | retval = {"k_major": int(values[0]), |
986 | d0c8c01d | Iustin Pop | "k_minor": int(values[1]), |
987 | d0c8c01d | Iustin Pop | "k_point": int(values[2]), |
988 | d0c8c01d | Iustin Pop | "api": int(values[3]), |
989 | d0c8c01d | Iustin Pop | "proto": int(values[4]), |
990 | abdf0113 | Iustin Pop | } |
991 | abdf0113 | Iustin Pop | if values[5] is not None: |
992 | d0c8c01d | Iustin Pop | retval["proto2"] = values[5] |
993 | a8083063 | Iustin Pop | |
994 | abdf0113 | Iustin Pop | return retval
|
995 | abdf0113 | Iustin Pop | |
996 | abdf0113 | Iustin Pop | @staticmethod
|
997 | 549071a0 | Luca Bigliardi | def GetUsermodeHelper(filename=_USERMODE_HELPER_FILE): |
998 | 549071a0 | Luca Bigliardi | """Returns DRBD usermode_helper currently set.
|
999 | 549071a0 | Luca Bigliardi |
|
1000 | 549071a0 | Luca Bigliardi | """
|
1001 | 549071a0 | Luca Bigliardi | try:
|
1002 | 549071a0 | Luca Bigliardi | helper = utils.ReadFile(filename).splitlines()[0]
|
1003 | 549071a0 | Luca Bigliardi | except EnvironmentError, err: |
1004 | 549071a0 | Luca Bigliardi | if err.errno == errno.ENOENT:
|
1005 | 549071a0 | Luca Bigliardi | _ThrowError("The file %s cannot be opened, check if the module"
|
1006 | 549071a0 | Luca Bigliardi | " is loaded (%s)", filename, str(err)) |
1007 | 549071a0 | Luca Bigliardi | else:
|
1008 | 549071a0 | Luca Bigliardi | _ThrowError("Can't read DRBD helper file %s: %s", filename, str(err)) |
1009 | 549071a0 | Luca Bigliardi | if not helper: |
1010 | 549071a0 | Luca Bigliardi | _ThrowError("Can't read any data from %s", filename)
|
1011 | 549071a0 | Luca Bigliardi | return helper
|
1012 | 549071a0 | Luca Bigliardi | |
1013 | 549071a0 | Luca Bigliardi | @staticmethod
|
1014 | abdf0113 | Iustin Pop | def _DevPath(minor): |
1015 | abdf0113 | Iustin Pop | """Return the path to a drbd device for a given minor.
|
1016 | a8083063 | Iustin Pop |
|
1017 | a8083063 | Iustin Pop | """
|
1018 | abdf0113 | Iustin Pop | return "/dev/drbd%d" % minor |
1019 | a8083063 | Iustin Pop | |
1020 | abdf0113 | Iustin Pop | @classmethod
|
1021 | 6d2e83d5 | Iustin Pop | def GetUsedDevs(cls): |
1022 | abdf0113 | Iustin Pop | """Compute the list of used DRBD devices.
|
1023 | a8083063 | Iustin Pop |
|
1024 | a8083063 | Iustin Pop | """
|
1025 | abdf0113 | Iustin Pop | data = cls._GetProcData() |
1026 | a8083063 | Iustin Pop | |
1027 | abdf0113 | Iustin Pop | used_devs = {} |
1028 | abdf0113 | Iustin Pop | for line in data: |
1029 | 9122e60a | Iustin Pop | match = cls._VALID_LINE_RE.match(line) |
1030 | abdf0113 | Iustin Pop | if not match: |
1031 | abdf0113 | Iustin Pop | continue
|
1032 | abdf0113 | Iustin Pop | minor = int(match.group(1)) |
1033 | abdf0113 | Iustin Pop | state = match.group(2)
|
1034 | abdf0113 | Iustin Pop | if state == cls._ST_UNCONFIGURED:
|
1035 | abdf0113 | Iustin Pop | continue
|
1036 | abdf0113 | Iustin Pop | used_devs[minor] = state, line |
1037 | a8083063 | Iustin Pop | |
1038 | abdf0113 | Iustin Pop | return used_devs
|
1039 | a8083063 | Iustin Pop | |
1040 | abdf0113 | Iustin Pop | def _SetFromMinor(self, minor): |
1041 | abdf0113 | Iustin Pop | """Set our parameters based on the given minor.
|
1042 | 0834c866 | Iustin Pop |
|
1043 | abdf0113 | Iustin Pop | This sets our minor variable and our dev_path.
|
1044 | a8083063 | Iustin Pop |
|
1045 | a8083063 | Iustin Pop | """
|
1046 | abdf0113 | Iustin Pop | if minor is None: |
1047 | abdf0113 | Iustin Pop | self.minor = self.dev_path = None |
1048 | cb999543 | Iustin Pop | self.attached = False |
1049 | a8083063 | Iustin Pop | else:
|
1050 | abdf0113 | Iustin Pop | self.minor = minor
|
1051 | abdf0113 | Iustin Pop | self.dev_path = self._DevPath(minor) |
1052 | cb999543 | Iustin Pop | self.attached = True |
1053 | a8083063 | Iustin Pop | |
1054 | a8083063 | Iustin Pop | @staticmethod
|
1055 | abdf0113 | Iustin Pop | def _CheckMetaSize(meta_device): |
1056 | abdf0113 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
1057 | a8083063 | Iustin Pop |
|
1058 | abdf0113 | Iustin Pop | This currently only check the size, which must be around
|
1059 | abdf0113 | Iustin Pop | 128MiB.
|
1060 | a8083063 | Iustin Pop |
|
1061 | a8083063 | Iustin Pop | """
|
1062 | abdf0113 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize", meta_device]) |
1063 | abdf0113 | Iustin Pop | if result.failed:
|
1064 | 9c793cfb | Iustin Pop | _ThrowError("Failed to get device size: %s - %s",
|
1065 | 9c793cfb | Iustin Pop | result.fail_reason, result.output) |
1066 | a8083063 | Iustin Pop | try:
|
1067 | abdf0113 | Iustin Pop | sectors = int(result.stdout)
|
1068 | 691744c4 | Iustin Pop | except (TypeError, ValueError): |
1069 | 9c793cfb | Iustin Pop | _ThrowError("Invalid output from blockdev: '%s'", result.stdout)
|
1070 | c04bc777 | Iustin Pop | num_bytes = sectors * 512
|
1071 | c04bc777 | Iustin Pop | if num_bytes < 128 * 1024 * 1024: # less than 128MiB |
1072 | c04bc777 | Iustin Pop | _ThrowError("Meta device too small (%.2fMib)", (num_bytes / 1024 / 1024)) |
1073 | 1dc10972 | Iustin Pop | # the maximum *valid* size of the meta device when living on top
|
1074 | 1dc10972 | Iustin Pop | # of LVM is hard to compute: it depends on the number of stripes
|
1075 | 1dc10972 | Iustin Pop | # and the PE size; e.g. a 2-stripe, 64MB PE will result in a 128MB
|
1076 | 1dc10972 | Iustin Pop | # (normal size), but an eight-stripe 128MB PE will result in a 1GB
|
1077 | 1dc10972 | Iustin Pop | # size meta device; as such, we restrict it to 1GB (a little bit
|
1078 | 1dc10972 | Iustin Pop | # too generous, but making assumptions about PE size is hard)
|
1079 | c04bc777 | Iustin Pop | if num_bytes > 1024 * 1024 * 1024: |
1080 | c04bc777 | Iustin Pop | _ThrowError("Meta device too big (%.2fMiB)", (num_bytes / 1024 / 1024)) |
1081 | a8083063 | Iustin Pop | |
1082 | abdf0113 | Iustin Pop | def Rename(self, new_id): |
1083 | abdf0113 | Iustin Pop | """Rename a device.
|
1084 | a8083063 | Iustin Pop |
|
1085 | abdf0113 | Iustin Pop | This is not supported for drbd devices.
|
1086 | a8083063 | Iustin Pop |
|
1087 | a8083063 | Iustin Pop | """
|
1088 | abdf0113 | Iustin Pop | raise errors.ProgrammerError("Can't rename a drbd device") |
1089 | a8083063 | Iustin Pop | |
1090 | f3e513ad | Iustin Pop | |
1091 | a2cfdea2 | Iustin Pop | class DRBD8(BaseDRBD): |
1092 | a2cfdea2 | Iustin Pop | """DRBD v8.x block device.
|
1093 | a2cfdea2 | Iustin Pop |
|
1094 | a2cfdea2 | Iustin Pop | This implements the local host part of the DRBD device, i.e. it
|
1095 | a2cfdea2 | Iustin Pop | doesn't do anything to the supposed peer. If you need a fully
|
1096 | a2cfdea2 | Iustin Pop | connected DRBD pair, you need to use this class on both hosts.
|
1097 | a2cfdea2 | Iustin Pop |
|
1098 | a2cfdea2 | Iustin Pop | The unique_id for the drbd device is the (local_ip, local_port,
|
1099 | a2cfdea2 | Iustin Pop | remote_ip, remote_port) tuple, and it must have two children: the
|
1100 | a2cfdea2 | Iustin Pop | data device and the meta_device. The meta device is checked for
|
1101 | a2cfdea2 | Iustin Pop | valid size and is zeroed on create.
|
1102 | a2cfdea2 | Iustin Pop |
|
1103 | a2cfdea2 | Iustin Pop | """
|
1104 | a2cfdea2 | Iustin Pop | _MAX_MINORS = 255
|
1105 | a2cfdea2 | Iustin Pop | _PARSE_SHOW = None
|
1106 | a2cfdea2 | Iustin Pop | |
1107 | cf8df3f3 | Iustin Pop | # timeout constants
|
1108 | cf8df3f3 | Iustin Pop | _NET_RECONFIG_TIMEOUT = 60
|
1109 | cf8df3f3 | Iustin Pop | |
1110 | 8a69b3a8 | Andrea Spadaccini | # command line options for barriers
|
1111 | 8a69b3a8 | Andrea Spadaccini | _DISABLE_DISK_OPTION = "--no-disk-barrier" # -a |
1112 | 8a69b3a8 | Andrea Spadaccini | _DISABLE_DRAIN_OPTION = "--no-disk-drain" # -D |
1113 | 8a69b3a8 | Andrea Spadaccini | _DISABLE_FLUSH_OPTION = "--no-disk-flushes" # -i |
1114 | 8a69b3a8 | Andrea Spadaccini | _DISABLE_META_FLUSH_OPTION = "--no-md-flushes" # -m |
1115 | 8a69b3a8 | Andrea Spadaccini | |
1116 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
1117 | fc1dc9d7 | Iustin Pop | if children and children.count(None) > 0: |
1118 | fc1dc9d7 | Iustin Pop | children = [] |
1119 | 310fbb64 | Iustin Pop | if len(children) not in (0, 2): |
1120 | 310fbb64 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(children)) |
1121 | 310fbb64 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 6: |
1122 | 310fbb64 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1123 | 310fbb64 | Iustin Pop | (self._lhost, self._lport, |
1124 | 310fbb64 | Iustin Pop | self._rhost, self._rport, |
1125 | 310fbb64 | Iustin Pop | self._aminor, self._secret) = unique_id |
1126 | 310fbb64 | Iustin Pop | if children:
|
1127 | 310fbb64 | Iustin Pop | if not _CanReadDevice(children[1].dev_path): |
1128 | 310fbb64 | Iustin Pop | logging.info("drbd%s: Ignoring unreadable meta device", self._aminor) |
1129 | 310fbb64 | Iustin Pop | children = [] |
1130 | 94dcbdb0 | Andrea Spadaccini | super(DRBD8, self).__init__(unique_id, children, size, params) |
1131 | a2cfdea2 | Iustin Pop | self.major = self._DRBD_MAJOR |
1132 | fcee765d | Manuel Franceschini | version = self._GetVersion(self._GetProcData()) |
1133 | e687ec01 | Michael Hanselmann | if version["k_major"] != 8: |
1134 | 82463074 | Iustin Pop | _ThrowError("Mismatch in DRBD kernel version and requested ganeti"
|
1135 | 82463074 | Iustin Pop | " usage: kernel is %s.%s, ganeti wants 8.x",
|
1136 | d0c8c01d | Iustin Pop | version["k_major"], version["k_minor"]) |
1137 | a2cfdea2 | Iustin Pop | |
1138 | ffa1c0dc | Iustin Pop | if (self._lhost is not None and self._lhost == self._rhost and |
1139 | ffa1c0dc | Iustin Pop | self._lport == self._rport): |
1140 | ffa1c0dc | Iustin Pop | raise ValueError("Invalid configuration data, same local/remote %s" % |
1141 | ffa1c0dc | Iustin Pop | (unique_id,)) |
1142 | a2cfdea2 | Iustin Pop | self.Attach()
|
1143 | a2cfdea2 | Iustin Pop | |
1144 | a2cfdea2 | Iustin Pop | @classmethod
|
1145 | a2cfdea2 | Iustin Pop | def _InitMeta(cls, minor, dev_path): |
1146 | a2cfdea2 | Iustin Pop | """Initialize a meta device.
|
1147 | a2cfdea2 | Iustin Pop |
|
1148 | a2cfdea2 | Iustin Pop | This will not work if the given minor is in use.
|
1149 | a2cfdea2 | Iustin Pop |
|
1150 | a2cfdea2 | Iustin Pop | """
|
1151 | 18e4dee6 | Iustin Pop | # Zero the metadata first, in order to make sure drbdmeta doesn't
|
1152 | 18e4dee6 | Iustin Pop | # try to auto-detect existing filesystems or similar (see
|
1153 | 18e4dee6 | Iustin Pop | # http://code.google.com/p/ganeti/issues/detail?id=182); we only
|
1154 | 18e4dee6 | Iustin Pop | # care about the first 128MB of data in the device, even though it
|
1155 | 18e4dee6 | Iustin Pop | # can be bigger
|
1156 | 18e4dee6 | Iustin Pop | result = utils.RunCmd([constants.DD_CMD, |
1157 | 18e4dee6 | Iustin Pop | "if=/dev/zero", "of=%s" % dev_path, |
1158 | 18e4dee6 | Iustin Pop | "bs=1048576", "count=128", "oflag=direct"]) |
1159 | 18e4dee6 | Iustin Pop | if result.failed:
|
1160 | 18e4dee6 | Iustin Pop | _ThrowError("Can't wipe the meta device: %s", result.output)
|
1161 | 18e4dee6 | Iustin Pop | |
1162 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", "--force", cls._DevPath(minor), |
1163 | a2cfdea2 | Iustin Pop | "v08", dev_path, "0", "create-md"]) |
1164 | a2cfdea2 | Iustin Pop | if result.failed:
|
1165 | 82463074 | Iustin Pop | _ThrowError("Can't initialize meta device: %s", result.output)
|
1166 | a2cfdea2 | Iustin Pop | |
1167 | a2cfdea2 | Iustin Pop | @classmethod
|
1168 | a2cfdea2 | Iustin Pop | def _FindUnusedMinor(cls): |
1169 | a2cfdea2 | Iustin Pop | """Find an unused DRBD device.
|
1170 | a2cfdea2 | Iustin Pop |
|
1171 | a2cfdea2 | Iustin Pop | This is specific to 8.x as the minors are allocated dynamically,
|
1172 | a2cfdea2 | Iustin Pop | so non-existing numbers up to a max minor count are actually free.
|
1173 | a2cfdea2 | Iustin Pop |
|
1174 | a2cfdea2 | Iustin Pop | """
|
1175 | a2cfdea2 | Iustin Pop | data = cls._GetProcData() |
1176 | a2cfdea2 | Iustin Pop | |
1177 | a2cfdea2 | Iustin Pop | highest = None
|
1178 | a2cfdea2 | Iustin Pop | for line in data: |
1179 | 9122e60a | Iustin Pop | match = cls._UNUSED_LINE_RE.match(line) |
1180 | a2cfdea2 | Iustin Pop | if match:
|
1181 | a2cfdea2 | Iustin Pop | return int(match.group(1)) |
1182 | 9122e60a | Iustin Pop | match = cls._VALID_LINE_RE.match(line) |
1183 | a2cfdea2 | Iustin Pop | if match:
|
1184 | a2cfdea2 | Iustin Pop | minor = int(match.group(1)) |
1185 | a2cfdea2 | Iustin Pop | highest = max(highest, minor)
|
1186 | a2cfdea2 | Iustin Pop | if highest is None: # there are no minors in use at all |
1187 | a2cfdea2 | Iustin Pop | return 0 |
1188 | a2cfdea2 | Iustin Pop | if highest >= cls._MAX_MINORS:
|
1189 | 468c5f77 | Iustin Pop | logging.error("Error: no free drbd minors!")
|
1190 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
1191 | a2cfdea2 | Iustin Pop | return highest + 1 |
1192 | a2cfdea2 | Iustin Pop | |
1193 | a2cfdea2 | Iustin Pop | @classmethod
|
1194 | a2cfdea2 | Iustin Pop | def _GetShowParser(cls): |
1195 | a2cfdea2 | Iustin Pop | """Return a parser for `drbd show` output.
|
1196 | a2cfdea2 | Iustin Pop |
|
1197 | a2cfdea2 | Iustin Pop | This will either create or return an already-create parser for the
|
1198 | a2cfdea2 | Iustin Pop | output of the command `drbd show`.
|
1199 | a2cfdea2 | Iustin Pop |
|
1200 | a2cfdea2 | Iustin Pop | """
|
1201 | a2cfdea2 | Iustin Pop | if cls._PARSE_SHOW is not None: |
1202 | a2cfdea2 | Iustin Pop | return cls._PARSE_SHOW
|
1203 | a2cfdea2 | Iustin Pop | |
1204 | a2cfdea2 | Iustin Pop | # pyparsing setup
|
1205 | a2cfdea2 | Iustin Pop | lbrace = pyp.Literal("{").suppress()
|
1206 | a2cfdea2 | Iustin Pop | rbrace = pyp.Literal("}").suppress()
|
1207 | 5a672c30 | Manuel Franceschini | lbracket = pyp.Literal("[").suppress()
|
1208 | 5a672c30 | Manuel Franceschini | rbracket = pyp.Literal("]").suppress()
|
1209 | a2cfdea2 | Iustin Pop | semi = pyp.Literal(";").suppress()
|
1210 | 5a672c30 | Manuel Franceschini | colon = pyp.Literal(":").suppress()
|
1211 | a2cfdea2 | Iustin Pop | # this also converts the value to an int
|
1212 | c522ea02 | Iustin Pop | number = pyp.Word(pyp.nums).setParseAction(lambda s, l, t: int(t[0])) |
1213 | a2cfdea2 | Iustin Pop | |
1214 | e687ec01 | Michael Hanselmann | comment = pyp.Literal("#") + pyp.Optional(pyp.restOfLine)
|
1215 | a2cfdea2 | Iustin Pop | defa = pyp.Literal("_is_default").suppress()
|
1216 | a2cfdea2 | Iustin Pop | dbl_quote = pyp.Literal('"').suppress()
|
1217 | a2cfdea2 | Iustin Pop | |
1218 | a2cfdea2 | Iustin Pop | keyword = pyp.Word(pyp.alphanums + '-')
|
1219 | a2cfdea2 | Iustin Pop | |
1220 | a2cfdea2 | Iustin Pop | # value types
|
1221 | a2cfdea2 | Iustin Pop | value = pyp.Word(pyp.alphanums + '_-/.:')
|
1222 | a2cfdea2 | Iustin Pop | quoted = dbl_quote + pyp.CharsNotIn('"') + dbl_quote
|
1223 | 5a672c30 | Manuel Franceschini | ipv4_addr = (pyp.Optional(pyp.Literal("ipv4")).suppress() +
|
1224 | 5a672c30 | Manuel Franceschini | pyp.Word(pyp.nums + ".") + colon + number)
|
1225 | 5a672c30 | Manuel Franceschini | ipv6_addr = (pyp.Optional(pyp.Literal("ipv6")).suppress() +
|
1226 | 5a672c30 | Manuel Franceschini | pyp.Optional(lbracket) + pyp.Word(pyp.hexnums + ":") +
|
1227 | 5a672c30 | Manuel Franceschini | pyp.Optional(rbracket) + colon + number) |
1228 | a2cfdea2 | Iustin Pop | # meta device, extended syntax
|
1229 | 5a672c30 | Manuel Franceschini | meta_value = ((value ^ quoted) + lbracket + number + rbracket) |
1230 | 01e2ce3a | Iustin Pop | # device name, extended syntax
|
1231 | 01e2ce3a | Iustin Pop | device_value = pyp.Literal("minor").suppress() + number
|
1232 | a2cfdea2 | Iustin Pop | |
1233 | a2cfdea2 | Iustin Pop | # a statement
|
1234 | a2cfdea2 | Iustin Pop | stmt = (~rbrace + keyword + ~lbrace + |
1235 | 5a672c30 | Manuel Franceschini | pyp.Optional(ipv4_addr ^ ipv6_addr ^ value ^ quoted ^ meta_value ^ |
1236 | 01e2ce3a | Iustin Pop | device_value) + |
1237 | a2cfdea2 | Iustin Pop | pyp.Optional(defa) + semi + |
1238 | a2cfdea2 | Iustin Pop | pyp.Optional(pyp.restOfLine).suppress()) |
1239 | a2cfdea2 | Iustin Pop | |
1240 | a2cfdea2 | Iustin Pop | # an entire section
|
1241 | d0c8c01d | Iustin Pop | section_name = pyp.Word(pyp.alphas + "_")
|
1242 | a2cfdea2 | Iustin Pop | section = section_name + lbrace + pyp.ZeroOrMore(pyp.Group(stmt)) + rbrace |
1243 | a2cfdea2 | Iustin Pop | |
1244 | a2cfdea2 | Iustin Pop | bnf = pyp.ZeroOrMore(pyp.Group(section ^ stmt)) |
1245 | a2cfdea2 | Iustin Pop | bnf.ignore(comment) |
1246 | a2cfdea2 | Iustin Pop | |
1247 | a2cfdea2 | Iustin Pop | cls._PARSE_SHOW = bnf |
1248 | a2cfdea2 | Iustin Pop | |
1249 | a2cfdea2 | Iustin Pop | return bnf
|
1250 | a2cfdea2 | Iustin Pop | |
1251 | a2cfdea2 | Iustin Pop | @classmethod
|
1252 | 3840729d | Iustin Pop | def _GetShowData(cls, minor): |
1253 | 3840729d | Iustin Pop | """Return the `drbdsetup show` data for a minor.
|
1254 | a2cfdea2 | Iustin Pop |
|
1255 | a2cfdea2 | Iustin Pop | """
|
1256 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
1257 | a2cfdea2 | Iustin Pop | if result.failed:
|
1258 | 468c5f77 | Iustin Pop | logging.error("Can't display the drbd config: %s - %s",
|
1259 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
1260 | 3840729d | Iustin Pop | return None |
1261 | 3840729d | Iustin Pop | return result.stdout
|
1262 | 3840729d | Iustin Pop | |
1263 | 3840729d | Iustin Pop | @classmethod
|
1264 | 3840729d | Iustin Pop | def _GetDevInfo(cls, out): |
1265 | 3840729d | Iustin Pop | """Parse details about a given DRBD minor.
|
1266 | 3840729d | Iustin Pop |
|
1267 | 3840729d | Iustin Pop | This return, if available, the local backing device (as a path)
|
1268 | 3840729d | Iustin Pop | and the local and remote (ip, port) information from a string
|
1269 | 3840729d | Iustin Pop | containing the output of the `drbdsetup show` command as returned
|
1270 | 3840729d | Iustin Pop | by _GetShowData.
|
1271 | 3840729d | Iustin Pop |
|
1272 | 3840729d | Iustin Pop | """
|
1273 | 3840729d | Iustin Pop | data = {} |
1274 | a2cfdea2 | Iustin Pop | if not out: |
1275 | a2cfdea2 | Iustin Pop | return data
|
1276 | a2cfdea2 | Iustin Pop | |
1277 | a2cfdea2 | Iustin Pop | bnf = cls._GetShowParser() |
1278 | a2cfdea2 | Iustin Pop | # run pyparse
|
1279 | a2cfdea2 | Iustin Pop | |
1280 | a2cfdea2 | Iustin Pop | try:
|
1281 | a2cfdea2 | Iustin Pop | results = bnf.parseString(out) |
1282 | a2cfdea2 | Iustin Pop | except pyp.ParseException, err:
|
1283 | 82463074 | Iustin Pop | _ThrowError("Can't parse drbdsetup show output: %s", str(err)) |
1284 | a2cfdea2 | Iustin Pop | |
1285 | a2cfdea2 | Iustin Pop | # and massage the results into our desired format
|
1286 | a2cfdea2 | Iustin Pop | for section in results: |
1287 | a2cfdea2 | Iustin Pop | sname = section[0]
|
1288 | a2cfdea2 | Iustin Pop | if sname == "_this_host": |
1289 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
1290 | a2cfdea2 | Iustin Pop | if lst[0] == "disk": |
1291 | a2cfdea2 | Iustin Pop | data["local_dev"] = lst[1] |
1292 | a2cfdea2 | Iustin Pop | elif lst[0] == "meta-disk": |
1293 | a2cfdea2 | Iustin Pop | data["meta_dev"] = lst[1] |
1294 | a2cfdea2 | Iustin Pop | data["meta_index"] = lst[2] |
1295 | a2cfdea2 | Iustin Pop | elif lst[0] == "address": |
1296 | a2cfdea2 | Iustin Pop | data["local_addr"] = tuple(lst[1:]) |
1297 | a2cfdea2 | Iustin Pop | elif sname == "_remote_host": |
1298 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
1299 | a2cfdea2 | Iustin Pop | if lst[0] == "address": |
1300 | a2cfdea2 | Iustin Pop | data["remote_addr"] = tuple(lst[1:]) |
1301 | a2cfdea2 | Iustin Pop | return data
|
1302 | a2cfdea2 | Iustin Pop | |
1303 | a2cfdea2 | Iustin Pop | def _MatchesLocal(self, info): |
1304 | a2cfdea2 | Iustin Pop | """Test if our local config matches with an existing device.
|
1305 | a2cfdea2 | Iustin Pop |
|
1306 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1307 | a2cfdea2 | Iustin Pop | method tests if our local backing device is the same as the one in
|
1308 | a2cfdea2 | Iustin Pop | the info parameter, in effect testing if we look like the given
|
1309 | a2cfdea2 | Iustin Pop | device.
|
1310 | a2cfdea2 | Iustin Pop |
|
1311 | a2cfdea2 | Iustin Pop | """
|
1312 | b00b95dd | Iustin Pop | if self._children: |
1313 | b00b95dd | Iustin Pop | backend, meta = self._children
|
1314 | b00b95dd | Iustin Pop | else:
|
1315 | b00b95dd | Iustin Pop | backend = meta = None
|
1316 | b00b95dd | Iustin Pop | |
1317 | a2cfdea2 | Iustin Pop | if backend is not None: |
1318 | b00b95dd | Iustin Pop | retval = ("local_dev" in info and info["local_dev"] == backend.dev_path) |
1319 | a2cfdea2 | Iustin Pop | else:
|
1320 | a2cfdea2 | Iustin Pop | retval = ("local_dev" not in info) |
1321 | b00b95dd | Iustin Pop | |
1322 | a2cfdea2 | Iustin Pop | if meta is not None: |
1323 | b00b95dd | Iustin Pop | retval = retval and ("meta_dev" in info and |
1324 | b00b95dd | Iustin Pop | info["meta_dev"] == meta.dev_path)
|
1325 | b00b95dd | Iustin Pop | retval = retval and ("meta_index" in info and |
1326 | b00b95dd | Iustin Pop | info["meta_index"] == 0) |
1327 | a2cfdea2 | Iustin Pop | else:
|
1328 | a2cfdea2 | Iustin Pop | retval = retval and ("meta_dev" not in info and |
1329 | a2cfdea2 | Iustin Pop | "meta_index" not in info) |
1330 | a2cfdea2 | Iustin Pop | return retval
|
1331 | a2cfdea2 | Iustin Pop | |
1332 | a2cfdea2 | Iustin Pop | def _MatchesNet(self, info): |
1333 | a2cfdea2 | Iustin Pop | """Test if our network config matches with an existing device.
|
1334 | a2cfdea2 | Iustin Pop |
|
1335 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1336 | a2cfdea2 | Iustin Pop | method tests if our network configuration is the same as the one
|
1337 | a2cfdea2 | Iustin Pop | in the info parameter, in effect testing if we look like the given
|
1338 | a2cfdea2 | Iustin Pop | device.
|
1339 | a2cfdea2 | Iustin Pop |
|
1340 | a2cfdea2 | Iustin Pop | """
|
1341 | a2cfdea2 | Iustin Pop | if (((self._lhost is None and not ("local_addr" in info)) and |
1342 | a2cfdea2 | Iustin Pop | (self._rhost is None and not ("remote_addr" in info)))): |
1343 | a2cfdea2 | Iustin Pop | return True |
1344 | a2cfdea2 | Iustin Pop | |
1345 | a2cfdea2 | Iustin Pop | if self._lhost is None: |
1346 | a2cfdea2 | Iustin Pop | return False |
1347 | a2cfdea2 | Iustin Pop | |
1348 | a2cfdea2 | Iustin Pop | if not ("local_addr" in info and |
1349 | a2cfdea2 | Iustin Pop | "remote_addr" in info): |
1350 | a2cfdea2 | Iustin Pop | return False |
1351 | a2cfdea2 | Iustin Pop | |
1352 | a2cfdea2 | Iustin Pop | retval = (info["local_addr"] == (self._lhost, self._lport)) |
1353 | a2cfdea2 | Iustin Pop | retval = (retval and
|
1354 | a2cfdea2 | Iustin Pop | info["remote_addr"] == (self._rhost, self._rport)) |
1355 | a2cfdea2 | Iustin Pop | return retval
|
1356 | a2cfdea2 | Iustin Pop | |
1357 | 8a69b3a8 | Andrea Spadaccini | def _AssembleLocal(self, minor, backend, meta, size): |
1358 | a2cfdea2 | Iustin Pop | """Configure the local part of a DRBD device.
|
1359 | a2cfdea2 | Iustin Pop |
|
1360 | a2cfdea2 | Iustin Pop | """
|
1361 | 8a69b3a8 | Andrea Spadaccini | args = ["drbdsetup", self._DevPath(minor), "disk", |
1362 | f069addf | Iustin Pop | backend, meta, "0",
|
1363 | f069addf | Iustin Pop | "-e", "detach", |
1364 | f069addf | Iustin Pop | "--create-device"]
|
1365 | 60bca04a | Iustin Pop | if size:
|
1366 | 60bca04a | Iustin Pop | args.extend(["-d", "%sm" % size]) |
1367 | 8a69b3a8 | Andrea Spadaccini | |
1368 | 8a69b3a8 | Andrea Spadaccini | version = self._GetVersion(self._GetProcData()) |
1369 | 8a69b3a8 | Andrea Spadaccini | vmaj = version["k_major"]
|
1370 | 8a69b3a8 | Andrea Spadaccini | vmin = version["k_minor"]
|
1371 | 8a69b3a8 | Andrea Spadaccini | vrel = version["k_point"]
|
1372 | 8a69b3a8 | Andrea Spadaccini | |
1373 | 8a69b3a8 | Andrea Spadaccini | barrier_args = \ |
1374 | 8a69b3a8 | Andrea Spadaccini | self._ComputeDiskBarrierArgs(vmaj, vmin, vrel,
|
1375 | ac00bf1b | Andrea Spadaccini | self.params[constants.LDP_BARRIERS],
|
1376 | ac00bf1b | Andrea Spadaccini | self.params[constants.LDP_NO_META_FLUSH])
|
1377 | 8a69b3a8 | Andrea Spadaccini | args.extend(barrier_args) |
1378 | 8a69b3a8 | Andrea Spadaccini | |
1379 | ad1dd4c7 | Andrea Spadaccini | if self.params[constants.LDP_DISK_CUSTOM]: |
1380 | ad1dd4c7 | Andrea Spadaccini | args.extend(shlex.split(self.params[constants.LDP_DISK_CUSTOM]))
|
1381 | ad1dd4c7 | Andrea Spadaccini | |
1382 | 333411a7 | Guido Trotter | result = utils.RunCmd(args) |
1383 | a2cfdea2 | Iustin Pop | if result.failed:
|
1384 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't attach local disk: %s", minor, result.output)
|
1385 | a2cfdea2 | Iustin Pop | |
1386 | 8a69b3a8 | Andrea Spadaccini | @classmethod
|
1387 | 8a69b3a8 | Andrea Spadaccini | def _ComputeDiskBarrierArgs(cls, vmaj, vmin, vrel, disabled_barriers, |
1388 | 8a69b3a8 | Andrea Spadaccini | disable_meta_flush): |
1389 | 8a69b3a8 | Andrea Spadaccini | """Compute the DRBD command line parameters for disk barriers
|
1390 | 8a69b3a8 | Andrea Spadaccini |
|
1391 | 8a69b3a8 | Andrea Spadaccini | Returns a list of the disk barrier parameters as requested via the
|
1392 | 8a69b3a8 | Andrea Spadaccini | disabled_barriers and disable_meta_flush arguments, and according to the
|
1393 | 8a69b3a8 | Andrea Spadaccini | supported ones in the DRBD version vmaj.vmin.vrel
|
1394 | 8a69b3a8 | Andrea Spadaccini |
|
1395 | 8a69b3a8 | Andrea Spadaccini | If the desired option is unsupported, raises errors.BlockDeviceError.
|
1396 | 8a69b3a8 | Andrea Spadaccini |
|
1397 | 8a69b3a8 | Andrea Spadaccini | """
|
1398 | 8a69b3a8 | Andrea Spadaccini | disabled_barriers_set = frozenset(disabled_barriers)
|
1399 | 8a69b3a8 | Andrea Spadaccini | if not disabled_barriers_set in constants.DRBD_VALID_BARRIER_OPT: |
1400 | 8a69b3a8 | Andrea Spadaccini | raise errors.BlockDeviceError("%s is not a valid option set for DRBD" |
1401 | 8a69b3a8 | Andrea Spadaccini | " barriers" % disabled_barriers)
|
1402 | 8a69b3a8 | Andrea Spadaccini | |
1403 | 8a69b3a8 | Andrea Spadaccini | args = [] |
1404 | 8a69b3a8 | Andrea Spadaccini | |
1405 | 8a69b3a8 | Andrea Spadaccini | # The following code assumes DRBD 8.x, with x < 4 and x != 1 (DRBD 8.1.x
|
1406 | 8a69b3a8 | Andrea Spadaccini | # does not exist)
|
1407 | 8a69b3a8 | Andrea Spadaccini | if not vmaj == 8 and vmin in (0, 2, 3): |
1408 | 8a69b3a8 | Andrea Spadaccini | raise errors.BlockDeviceError("Unsupported DRBD version: %d.%d.%d" % |
1409 | 8a69b3a8 | Andrea Spadaccini | (vmaj, vmin, vrel)) |
1410 | 8a69b3a8 | Andrea Spadaccini | |
1411 | 8a69b3a8 | Andrea Spadaccini | def _AppendOrRaise(option, min_version): |
1412 | 8a69b3a8 | Andrea Spadaccini | """Helper for DRBD options"""
|
1413 | 8a69b3a8 | Andrea Spadaccini | if min_version is not None and vrel >= min_version: |
1414 | 8a69b3a8 | Andrea Spadaccini | args.append(option) |
1415 | 8a69b3a8 | Andrea Spadaccini | else:
|
1416 | 8a69b3a8 | Andrea Spadaccini | raise errors.BlockDeviceError("Could not use the option %s as the" |
1417 | 8a69b3a8 | Andrea Spadaccini | " DRBD version %d.%d.%d does not support"
|
1418 | 8a69b3a8 | Andrea Spadaccini | " it." % (option, vmaj, vmin, vrel))
|
1419 | 8a69b3a8 | Andrea Spadaccini | |
1420 | 8a69b3a8 | Andrea Spadaccini | # the minimum version for each feature is encoded via pairs of (minor
|
1421 | 8a69b3a8 | Andrea Spadaccini | # version -> x) where x is version in which support for the option was
|
1422 | 8a69b3a8 | Andrea Spadaccini | # introduced.
|
1423 | 8a69b3a8 | Andrea Spadaccini | meta_flush_supported = disk_flush_supported = { |
1424 | 8a69b3a8 | Andrea Spadaccini | 0: 12, |
1425 | 8a69b3a8 | Andrea Spadaccini | 2: 7, |
1426 | 8a69b3a8 | Andrea Spadaccini | 3: 0, |
1427 | 8a69b3a8 | Andrea Spadaccini | } |
1428 | 8a69b3a8 | Andrea Spadaccini | |
1429 | 8a69b3a8 | Andrea Spadaccini | disk_drain_supported = { |
1430 | 8a69b3a8 | Andrea Spadaccini | 2: 7, |
1431 | 8a69b3a8 | Andrea Spadaccini | 3: 0, |
1432 | 8a69b3a8 | Andrea Spadaccini | } |
1433 | 8a69b3a8 | Andrea Spadaccini | |
1434 | 8a69b3a8 | Andrea Spadaccini | disk_barriers_supported = { |
1435 | 8a69b3a8 | Andrea Spadaccini | 3: 0, |
1436 | 8a69b3a8 | Andrea Spadaccini | } |
1437 | 8a69b3a8 | Andrea Spadaccini | |
1438 | 8a69b3a8 | Andrea Spadaccini | # meta flushes
|
1439 | 8a69b3a8 | Andrea Spadaccini | if disable_meta_flush:
|
1440 | 8a69b3a8 | Andrea Spadaccini | _AppendOrRaise(cls._DISABLE_META_FLUSH_OPTION, |
1441 | 8a69b3a8 | Andrea Spadaccini | meta_flush_supported.get(vmin, None))
|
1442 | 8a69b3a8 | Andrea Spadaccini | |
1443 | 8a69b3a8 | Andrea Spadaccini | # disk flushes
|
1444 | 8a69b3a8 | Andrea Spadaccini | if constants.DRBD_B_DISK_FLUSH in disabled_barriers_set: |
1445 | 8a69b3a8 | Andrea Spadaccini | _AppendOrRaise(cls._DISABLE_FLUSH_OPTION, |
1446 | 8a69b3a8 | Andrea Spadaccini | disk_flush_supported.get(vmin, None))
|
1447 | 8a69b3a8 | Andrea Spadaccini | |
1448 | 8a69b3a8 | Andrea Spadaccini | # disk drain
|
1449 | 8a69b3a8 | Andrea Spadaccini | if constants.DRBD_B_DISK_DRAIN in disabled_barriers_set: |
1450 | 8a69b3a8 | Andrea Spadaccini | _AppendOrRaise(cls._DISABLE_DRAIN_OPTION, |
1451 | 8a69b3a8 | Andrea Spadaccini | disk_drain_supported.get(vmin, None))
|
1452 | 8a69b3a8 | Andrea Spadaccini | |
1453 | 8a69b3a8 | Andrea Spadaccini | # disk barriers
|
1454 | 8a69b3a8 | Andrea Spadaccini | if constants.DRBD_B_DISK_BARRIERS in disabled_barriers_set: |
1455 | 8a69b3a8 | Andrea Spadaccini | _AppendOrRaise(cls._DISABLE_DISK_OPTION, |
1456 | 8a69b3a8 | Andrea Spadaccini | disk_barriers_supported.get(vmin, None))
|
1457 | 8a69b3a8 | Andrea Spadaccini | |
1458 | 8a69b3a8 | Andrea Spadaccini | return args
|
1459 | 8a69b3a8 | Andrea Spadaccini | |
1460 | 6e9814a1 | Andrea Spadaccini | def _AssembleNet(self, minor, net_info, protocol, |
1461 | a2cfdea2 | Iustin Pop | dual_pri=False, hmac=None, secret=None): |
1462 | a2cfdea2 | Iustin Pop | """Configure the network part of the device.
|
1463 | a2cfdea2 | Iustin Pop |
|
1464 | a2cfdea2 | Iustin Pop | """
|
1465 | a2cfdea2 | Iustin Pop | lhost, lport, rhost, rport = net_info |
1466 | 52857176 | Iustin Pop | if None in net_info: |
1467 | 52857176 | Iustin Pop | # we don't want network connection and actually want to make
|
1468 | 52857176 | Iustin Pop | # sure its shutdown
|
1469 | 6e9814a1 | Andrea Spadaccini | self._ShutdownNet(minor)
|
1470 | 1063abd1 | Iustin Pop | return
|
1471 | 52857176 | Iustin Pop | |
1472 | 7d585316 | Iustin Pop | # Workaround for a race condition. When DRBD is doing its dance to
|
1473 | 7d585316 | Iustin Pop | # establish a connection with its peer, it also sends the
|
1474 | 7d585316 | Iustin Pop | # synchronization speed over the wire. In some cases setting the
|
1475 | 7d585316 | Iustin Pop | # sync speed only after setting up both sides can race with DRBD
|
1476 | 7d585316 | Iustin Pop | # connecting, hence we set it here before telling DRBD anything
|
1477 | 7d585316 | Iustin Pop | # about its peer.
|
1478 | f2f57b6e | Andrea Spadaccini | self._SetMinorSyncParams(minor, self.params) |
1479 | 7d585316 | Iustin Pop | |
1480 | 8b312c1d | Manuel Franceschini | if netutils.IP6Address.IsValid(lhost):
|
1481 | 8b312c1d | Manuel Franceschini | if not netutils.IP6Address.IsValid(rhost): |
1482 | 5a672c30 | Manuel Franceschini | _ThrowError("drbd%d: can't connect ip %s to ip %s" %
|
1483 | 5a672c30 | Manuel Franceschini | (minor, lhost, rhost)) |
1484 | 5a672c30 | Manuel Franceschini | family = "ipv6"
|
1485 | 8b312c1d | Manuel Franceschini | elif netutils.IP4Address.IsValid(lhost):
|
1486 | 8b312c1d | Manuel Franceschini | if not netutils.IP4Address.IsValid(rhost): |
1487 | 5a672c30 | Manuel Franceschini | _ThrowError("drbd%d: can't connect ip %s to ip %s" %
|
1488 | 5a672c30 | Manuel Franceschini | (minor, lhost, rhost)) |
1489 | 5a672c30 | Manuel Franceschini | family = "ipv4"
|
1490 | 5a672c30 | Manuel Franceschini | else:
|
1491 | 5a672c30 | Manuel Franceschini | _ThrowError("drbd%d: Invalid ip %s" % (minor, lhost))
|
1492 | 5a672c30 | Manuel Franceschini | |
1493 | 6e9814a1 | Andrea Spadaccini | args = ["drbdsetup", self._DevPath(minor), "net", |
1494 | 5a672c30 | Manuel Franceschini | "%s:%s:%s" % (family, lhost, lport),
|
1495 | 5a672c30 | Manuel Franceschini | "%s:%s:%s" % (family, rhost, rport), protocol,
|
1496 | f38478b2 | Iustin Pop | "-A", "discard-zero-changes", |
1497 | f38478b2 | Iustin Pop | "-B", "consensus", |
1498 | ab6cc81c | Iustin Pop | "--create-device",
|
1499 | f38478b2 | Iustin Pop | ] |
1500 | a2cfdea2 | Iustin Pop | if dual_pri:
|
1501 | a2cfdea2 | Iustin Pop | args.append("-m")
|
1502 | a2cfdea2 | Iustin Pop | if hmac and secret: |
1503 | a2cfdea2 | Iustin Pop | args.extend(["-a", hmac, "-x", secret]) |
1504 | ad1dd4c7 | Andrea Spadaccini | |
1505 | ad1dd4c7 | Andrea Spadaccini | if self.params[constants.LDP_NET_CUSTOM]: |
1506 | ad1dd4c7 | Andrea Spadaccini | args.extend(shlex.split(self.params[constants.LDP_NET_CUSTOM]))
|
1507 | ad1dd4c7 | Andrea Spadaccini | |
1508 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(args) |
1509 | a2cfdea2 | Iustin Pop | if result.failed:
|
1510 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't setup network: %s - %s",
|
1511 | 1063abd1 | Iustin Pop | minor, result.fail_reason, result.output) |
1512 | a2cfdea2 | Iustin Pop | |
1513 | def8e2f6 | Michael Hanselmann | def _CheckNetworkConfig(): |
1514 | 6e9814a1 | Andrea Spadaccini | info = self._GetDevInfo(self._GetShowData(minor)) |
1515 | a2cfdea2 | Iustin Pop | if not "local_addr" in info or not "remote_addr" in info: |
1516 | def8e2f6 | Michael Hanselmann | raise utils.RetryAgain()
|
1517 | def8e2f6 | Michael Hanselmann | |
1518 | a2cfdea2 | Iustin Pop | if (info["local_addr"] != (lhost, lport) or |
1519 | a2cfdea2 | Iustin Pop | info["remote_addr"] != (rhost, rport)):
|
1520 | def8e2f6 | Michael Hanselmann | raise utils.RetryAgain()
|
1521 | def8e2f6 | Michael Hanselmann | |
1522 | def8e2f6 | Michael Hanselmann | try:
|
1523 | def8e2f6 | Michael Hanselmann | utils.Retry(_CheckNetworkConfig, 1.0, 10.0) |
1524 | def8e2f6 | Michael Hanselmann | except utils.RetryTimeout:
|
1525 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: timeout while configuring network", minor)
|
1526 | a2cfdea2 | Iustin Pop | |
1527 | b00b95dd | Iustin Pop | def AddChildren(self, devices): |
1528 | b00b95dd | Iustin Pop | """Add a disk to the DRBD device.
|
1529 | b00b95dd | Iustin Pop |
|
1530 | b00b95dd | Iustin Pop | """
|
1531 | b00b95dd | Iustin Pop | if self.minor is None: |
1532 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't attach to dbrd8 during AddChildren",
|
1533 | 82463074 | Iustin Pop | self._aminor)
|
1534 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1535 | 82463074 | Iustin Pop | _ThrowError("drbd%d: need two devices for AddChildren", self.minor) |
1536 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1537 | 03ece5f3 | Iustin Pop | if "local_dev" in info: |
1538 | 82463074 | Iustin Pop | _ThrowError("drbd%d: already attached to a local disk", self.minor) |
1539 | b00b95dd | Iustin Pop | backend, meta = devices |
1540 | b00b95dd | Iustin Pop | if backend.dev_path is None or meta.dev_path is None: |
1541 | 82463074 | Iustin Pop | _ThrowError("drbd%d: children not ready during AddChildren", self.minor) |
1542 | b00b95dd | Iustin Pop | backend.Open() |
1543 | b00b95dd | Iustin Pop | meta.Open() |
1544 | 9c793cfb | Iustin Pop | self._CheckMetaSize(meta.dev_path)
|
1545 | b00b95dd | Iustin Pop | self._InitMeta(self._FindUnusedMinor(), meta.dev_path) |
1546 | b00b95dd | Iustin Pop | |
1547 | f069addf | Iustin Pop | self._AssembleLocal(self.minor, backend.dev_path, meta.dev_path, self.size) |
1548 | b00b95dd | Iustin Pop | self._children = devices
|
1549 | b00b95dd | Iustin Pop | |
1550 | b00b95dd | Iustin Pop | def RemoveChildren(self, devices): |
1551 | b00b95dd | Iustin Pop | """Detach the drbd device from local storage.
|
1552 | b00b95dd | Iustin Pop |
|
1553 | b00b95dd | Iustin Pop | """
|
1554 | b00b95dd | Iustin Pop | if self.minor is None: |
1555 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't attach to drbd8 during RemoveChildren",
|
1556 | 82463074 | Iustin Pop | self._aminor)
|
1557 | 03ece5f3 | Iustin Pop | # early return if we don't actually have backing storage
|
1558 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1559 | 03ece5f3 | Iustin Pop | if "local_dev" not in info: |
1560 | 03ece5f3 | Iustin Pop | return
|
1561 | b00b95dd | Iustin Pop | if len(self._children) != 2: |
1562 | 82463074 | Iustin Pop | _ThrowError("drbd%d: we don't have two children: %s", self.minor, |
1563 | 82463074 | Iustin Pop | self._children)
|
1564 | e739bd57 | Iustin Pop | if self._children.count(None) == 2: # we don't actually have children :) |
1565 | 82463074 | Iustin Pop | logging.warning("drbd%d: requested detach while detached", self.minor) |
1566 | e739bd57 | Iustin Pop | return
|
1567 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1568 | 82463074 | Iustin Pop | _ThrowError("drbd%d: we need two children in RemoveChildren", self.minor) |
1569 | e739bd57 | Iustin Pop | for child, dev in zip(self._children, devices): |
1570 | e739bd57 | Iustin Pop | if dev != child.dev_path:
|
1571 | 82463074 | Iustin Pop | _ThrowError("drbd%d: mismatch in local storage (%s != %s) in"
|
1572 | 82463074 | Iustin Pop | " RemoveChildren", self.minor, dev, child.dev_path) |
1573 | b00b95dd | Iustin Pop | |
1574 | 1063abd1 | Iustin Pop | self._ShutdownLocal(self.minor) |
1575 | b00b95dd | Iustin Pop | self._children = []
|
1576 | b00b95dd | Iustin Pop | |
1577 | 7d585316 | Iustin Pop | @classmethod
|
1578 | f2f57b6e | Andrea Spadaccini | def _SetMinorSyncParams(cls, minor, params): |
1579 | f2f57b6e | Andrea Spadaccini | """Set the parameters of the DRBD syncer.
|
1580 | a2cfdea2 | Iustin Pop |
|
1581 | 7d585316 | Iustin Pop | This is the low-level implementation.
|
1582 | 7d585316 | Iustin Pop |
|
1583 | 7d585316 | Iustin Pop | @type minor: int
|
1584 | 7d585316 | Iustin Pop | @param minor: the drbd minor whose settings we change
|
1585 | f2f57b6e | Andrea Spadaccini | @type params: dict
|
1586 | f2f57b6e | Andrea Spadaccini | @param params: LD level disk parameters related to the synchronization
|
1587 | 7d585316 | Iustin Pop | @rtype: boolean
|
1588 | 7d585316 | Iustin Pop | @return: the success of the operation
|
1589 | 7d585316 | Iustin Pop |
|
1590 | a2cfdea2 | Iustin Pop | """
|
1591 | f2f57b6e | Andrea Spadaccini | |
1592 | f2f57b6e | Andrea Spadaccini | args = ["drbdsetup", cls._DevPath(minor), "syncer"] |
1593 | f2f57b6e | Andrea Spadaccini | if params[constants.LDP_DYNAMIC_RESYNC]:
|
1594 | f2f57b6e | Andrea Spadaccini | version = cls._GetVersion(cls._GetProcData()) |
1595 | f2f57b6e | Andrea Spadaccini | vmin = version["k_minor"]
|
1596 | f2f57b6e | Andrea Spadaccini | vrel = version["k_point"]
|
1597 | f2f57b6e | Andrea Spadaccini | |
1598 | f2f57b6e | Andrea Spadaccini | # By definition we are using 8.x, so just check the rest of the version
|
1599 | f2f57b6e | Andrea Spadaccini | # number
|
1600 | f2f57b6e | Andrea Spadaccini | if vmin != 3 or vrel < 9: |
1601 | f2f57b6e | Andrea Spadaccini | logging.error("The current DRBD version (8.%d.%d) does not support the"
|
1602 | f2f57b6e | Andrea Spadaccini | " dynamic resync speed controller", vmin, vrel)
|
1603 | f2f57b6e | Andrea Spadaccini | return False |
1604 | f2f57b6e | Andrea Spadaccini | |
1605 | f2f57b6e | Andrea Spadaccini | # add the c-* parameters to args
|
1606 | f2f57b6e | Andrea Spadaccini | # TODO(spadaccio) use the actual parameters
|
1607 | f2f57b6e | Andrea Spadaccini | args.extend(["--c-plan-ahead", "20"]) |
1608 | f2f57b6e | Andrea Spadaccini | |
1609 | f2f57b6e | Andrea Spadaccini | else:
|
1610 | f2f57b6e | Andrea Spadaccini | args.extend(["-r", "%d" % params[constants.LDP_RESYNC_RATE]]) |
1611 | f2f57b6e | Andrea Spadaccini | |
1612 | f2f57b6e | Andrea Spadaccini | args.append("--create-device")
|
1613 | f2f57b6e | Andrea Spadaccini | result = utils.RunCmd(args) |
1614 | a2cfdea2 | Iustin Pop | if result.failed:
|
1615 | 468c5f77 | Iustin Pop | logging.error("Can't change syncer rate: %s - %s",
|
1616 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
1617 | 7d585316 | Iustin Pop | return not result.failed |
1618 | 7d585316 | Iustin Pop | |
1619 | f2f57b6e | Andrea Spadaccini | def SetSyncParams(self, params): |
1620 | f2f57b6e | Andrea Spadaccini | """Set the synchronization parameters of the DRBD syncer.
|
1621 | 7d585316 | Iustin Pop |
|
1622 | f2f57b6e | Andrea Spadaccini | @type params: dict
|
1623 | f2f57b6e | Andrea Spadaccini | @param params: LD level disk parameters related to the synchronization
|
1624 | 7d585316 | Iustin Pop | @rtype: boolean
|
1625 | 7d585316 | Iustin Pop | @return: the success of the operation
|
1626 | 7d585316 | Iustin Pop |
|
1627 | 7d585316 | Iustin Pop | """
|
1628 | 7d585316 | Iustin Pop | if self.minor is None: |
1629 | f2f57b6e | Andrea Spadaccini | logging.info("Not attached during SetSyncParams")
|
1630 | 7d585316 | Iustin Pop | return False |
1631 | f2f57b6e | Andrea Spadaccini | children_result = super(DRBD8, self).SetSyncParams(params) |
1632 | f2f57b6e | Andrea Spadaccini | return self._SetMinorSyncParams(self.minor, params) and children_result |
1633 | a2cfdea2 | Iustin Pop | |
1634 | a3fffcc6 | Renรฉ Nussbaumer | def PauseResumeSync(self, pause): |
1635 | a3fffcc6 | Renรฉ Nussbaumer | """Pauses or resumes the sync of a DRBD device.
|
1636 | a3fffcc6 | Renรฉ Nussbaumer |
|
1637 | a3fffcc6 | Renรฉ Nussbaumer | @param pause: Wether to pause or resume
|
1638 | a3fffcc6 | Renรฉ Nussbaumer | @return: the success of the operation
|
1639 | a3fffcc6 | Renรฉ Nussbaumer |
|
1640 | a3fffcc6 | Renรฉ Nussbaumer | """
|
1641 | a3fffcc6 | Renรฉ Nussbaumer | if self.minor is None: |
1642 | a3fffcc6 | Renรฉ Nussbaumer | logging.info("Not attached during PauseSync")
|
1643 | a3fffcc6 | Renรฉ Nussbaumer | return False |
1644 | a3fffcc6 | Renรฉ Nussbaumer | |
1645 | a3fffcc6 | Renรฉ Nussbaumer | children_result = super(DRBD8, self).PauseResumeSync(pause) |
1646 | a3fffcc6 | Renรฉ Nussbaumer | |
1647 | a3fffcc6 | Renรฉ Nussbaumer | if pause:
|
1648 | a3fffcc6 | Renรฉ Nussbaumer | cmd = "pause-sync"
|
1649 | a3fffcc6 | Renรฉ Nussbaumer | else:
|
1650 | a3fffcc6 | Renรฉ Nussbaumer | cmd = "resume-sync"
|
1651 | a3fffcc6 | Renรฉ Nussbaumer | |
1652 | a3fffcc6 | Renรฉ Nussbaumer | result = utils.RunCmd(["drbdsetup", self.dev_path, cmd]) |
1653 | a3fffcc6 | Renรฉ Nussbaumer | if result.failed:
|
1654 | a3fffcc6 | Renรฉ Nussbaumer | logging.error("Can't %s: %s - %s", cmd,
|
1655 | a3fffcc6 | Renรฉ Nussbaumer | result.fail_reason, result.output) |
1656 | a3fffcc6 | Renรฉ Nussbaumer | return not result.failed and children_result |
1657 | a3fffcc6 | Renรฉ Nussbaumer | |
1658 | 6b90c22e | Iustin Pop | def GetProcStatus(self): |
1659 | 6b90c22e | Iustin Pop | """Return device data from /proc.
|
1660 | 6b90c22e | Iustin Pop |
|
1661 | 6b90c22e | Iustin Pop | """
|
1662 | 6b90c22e | Iustin Pop | if self.minor is None: |
1663 | 82463074 | Iustin Pop | _ThrowError("drbd%d: GetStats() called while not attached", self._aminor) |
1664 | 6b90c22e | Iustin Pop | proc_info = self._MassageProcData(self._GetProcData()) |
1665 | 6b90c22e | Iustin Pop | if self.minor not in proc_info: |
1666 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't find myself in /proc", self.minor) |
1667 | 6b90c22e | Iustin Pop | return DRBD8Status(proc_info[self.minor]) |
1668 | 6b90c22e | Iustin Pop | |
1669 | a2cfdea2 | Iustin Pop | def GetSyncStatus(self): |
1670 | a2cfdea2 | Iustin Pop | """Returns the sync status of the device.
|
1671 | a2cfdea2 | Iustin Pop |
|
1672 | a2cfdea2 | Iustin Pop |
|
1673 | a2cfdea2 | Iustin Pop | If sync_percent is None, it means all is ok
|
1674 | 5bbd3f7f | Michael Hanselmann | If estimated_time is None, it means we can't estimate
|
1675 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
|
1676 | 0834c866 | Iustin Pop |
|
1677 | 0834c866 | Iustin Pop |
|
1678 | 0834c866 | Iustin Pop | We set the is_degraded parameter to True on two conditions:
|
1679 | 0834c866 | Iustin Pop | network not connected or local disk missing.
|
1680 | 0834c866 | Iustin Pop |
|
1681 | 5bbd3f7f | Michael Hanselmann | We compute the ldisk parameter based on whether we have a local
|
1682 | 0834c866 | Iustin Pop | disk or not.
|
1683 | a2cfdea2 | Iustin Pop |
|
1684 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
1685 | c41eea6e | Iustin Pop |
|
1686 | a2cfdea2 | Iustin Pop | """
|
1687 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1688 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't Attach() in GetSyncStatus", self._aminor) |
1689 | 96acbc09 | Michael Hanselmann | |
1690 | 6b90c22e | Iustin Pop | stats = self.GetProcStatus()
|
1691 | f208978a | Michael Hanselmann | is_degraded = not stats.is_connected or not stats.is_disk_uptodate |
1692 | f208978a | Michael Hanselmann | |
1693 | f208978a | Michael Hanselmann | if stats.is_disk_uptodate:
|
1694 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_OKAY |
1695 | f208978a | Michael Hanselmann | elif stats.is_diskless:
|
1696 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_FAULTY |
1697 | f208978a | Michael Hanselmann | else:
|
1698 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_UNKNOWN |
1699 | 96acbc09 | Michael Hanselmann | |
1700 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
1701 | 96acbc09 | Michael Hanselmann | major=self.major,
|
1702 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
1703 | 96acbc09 | Michael Hanselmann | sync_percent=stats.sync_percent, |
1704 | 96acbc09 | Michael Hanselmann | estimated_time=stats.est_time, |
1705 | f208978a | Michael Hanselmann | is_degraded=is_degraded, |
1706 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
1707 | a2cfdea2 | Iustin Pop | |
1708 | a2cfdea2 | Iustin Pop | def Open(self, force=False): |
1709 | a2cfdea2 | Iustin Pop | """Make the local state primary.
|
1710 | a2cfdea2 | Iustin Pop |
|
1711 | f860ff4e | Guido Trotter | If the 'force' parameter is given, the '-o' option is passed to
|
1712 | f860ff4e | Guido Trotter | drbdsetup. Since this is a potentially dangerous operation, the
|
1713 | a2cfdea2 | Iustin Pop | force flag should be only given after creation, when it actually
|
1714 | f860ff4e | Guido Trotter | is mandatory.
|
1715 | a2cfdea2 | Iustin Pop |
|
1716 | a2cfdea2 | Iustin Pop | """
|
1717 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1718 | 468c5f77 | Iustin Pop | logging.error("DRBD cannot attach to a device during open")
|
1719 | a2cfdea2 | Iustin Pop | return False |
1720 | a2cfdea2 | Iustin Pop | cmd = ["drbdsetup", self.dev_path, "primary"] |
1721 | a2cfdea2 | Iustin Pop | if force:
|
1722 | a2cfdea2 | Iustin Pop | cmd.append("-o")
|
1723 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(cmd) |
1724 | a2cfdea2 | Iustin Pop | if result.failed:
|
1725 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't make drbd device primary: %s", self.minor, |
1726 | 82463074 | Iustin Pop | result.output) |
1727 | a2cfdea2 | Iustin Pop | |
1728 | a2cfdea2 | Iustin Pop | def Close(self): |
1729 | a2cfdea2 | Iustin Pop | """Make the local state secondary.
|
1730 | a2cfdea2 | Iustin Pop |
|
1731 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1732 | a2cfdea2 | Iustin Pop |
|
1733 | a2cfdea2 | Iustin Pop | """
|
1734 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1735 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't Attach() in Close()", self._aminor) |
1736 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
1737 | a2cfdea2 | Iustin Pop | if result.failed:
|
1738 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't switch drbd device to secondary: %s",
|
1739 | 82463074 | Iustin Pop | self.minor, result.output)
|
1740 | a2cfdea2 | Iustin Pop | |
1741 | cf8df3f3 | Iustin Pop | def DisconnectNet(self): |
1742 | cf8df3f3 | Iustin Pop | """Removes network configuration.
|
1743 | cf8df3f3 | Iustin Pop |
|
1744 | cf8df3f3 | Iustin Pop | This method shutdowns the network side of the device.
|
1745 | cf8df3f3 | Iustin Pop |
|
1746 | cf8df3f3 | Iustin Pop | The method will wait up to a hardcoded timeout for the device to
|
1747 | cf8df3f3 | Iustin Pop | go into standalone after the 'disconnect' command before
|
1748 | cf8df3f3 | Iustin Pop | re-configuring it, as sometimes it takes a while for the
|
1749 | cf8df3f3 | Iustin Pop | disconnect to actually propagate and thus we might issue a 'net'
|
1750 | cf8df3f3 | Iustin Pop | command while the device is still connected. If the device will
|
1751 | cf8df3f3 | Iustin Pop | still be attached to the network and we time out, we raise an
|
1752 | cf8df3f3 | Iustin Pop | exception.
|
1753 | cf8df3f3 | Iustin Pop |
|
1754 | cf8df3f3 | Iustin Pop | """
|
1755 | cf8df3f3 | Iustin Pop | if self.minor is None: |
1756 | 82463074 | Iustin Pop | _ThrowError("drbd%d: disk not attached in re-attach net", self._aminor) |
1757 | cf8df3f3 | Iustin Pop | |
1758 | cf8df3f3 | Iustin Pop | if None in (self._lhost, self._lport, self._rhost, self._rport): |
1759 | 82463074 | Iustin Pop | _ThrowError("drbd%d: DRBD disk missing network info in"
|
1760 | 82463074 | Iustin Pop | " DisconnectNet()", self.minor) |
1761 | cf8df3f3 | Iustin Pop | |
1762 | def8e2f6 | Michael Hanselmann | class _DisconnectStatus: |
1763 | def8e2f6 | Michael Hanselmann | def __init__(self, ever_disconnected): |
1764 | def8e2f6 | Michael Hanselmann | self.ever_disconnected = ever_disconnected
|
1765 | cf8df3f3 | Iustin Pop | |
1766 | def8e2f6 | Michael Hanselmann | dstatus = _DisconnectStatus(_IgnoreError(self._ShutdownNet, self.minor)) |
1767 | def8e2f6 | Michael Hanselmann | |
1768 | def8e2f6 | Michael Hanselmann | def _WaitForDisconnect(): |
1769 | def8e2f6 | Michael Hanselmann | if self.GetProcStatus().is_standalone: |
1770 | def8e2f6 | Michael Hanselmann | return
|
1771 | def8e2f6 | Michael Hanselmann | |
1772 | def8e2f6 | Michael Hanselmann | # retry the disconnect, it seems possible that due to a well-time
|
1773 | def8e2f6 | Michael Hanselmann | # disconnect on the peer, my disconnect command might be ignored and
|
1774 | def8e2f6 | Michael Hanselmann | # forgotten
|
1775 | def8e2f6 | Michael Hanselmann | dstatus.ever_disconnected = \ |
1776 | def8e2f6 | Michael Hanselmann | _IgnoreError(self._ShutdownNet, self.minor) or dstatus.ever_disconnected |
1777 | def8e2f6 | Michael Hanselmann | |
1778 | def8e2f6 | Michael Hanselmann | raise utils.RetryAgain()
|
1779 | def8e2f6 | Michael Hanselmann | |
1780 | def8e2f6 | Michael Hanselmann | # Keep start time
|
1781 | def8e2f6 | Michael Hanselmann | start_time = time.time() |
1782 | def8e2f6 | Michael Hanselmann | |
1783 | def8e2f6 | Michael Hanselmann | try:
|
1784 | def8e2f6 | Michael Hanselmann | # Start delay at 100 milliseconds and grow up to 2 seconds
|
1785 | def8e2f6 | Michael Hanselmann | utils.Retry(_WaitForDisconnect, (0.1, 1.5, 2.0), |
1786 | def8e2f6 | Michael Hanselmann | self._NET_RECONFIG_TIMEOUT)
|
1787 | def8e2f6 | Michael Hanselmann | except utils.RetryTimeout:
|
1788 | def8e2f6 | Michael Hanselmann | if dstatus.ever_disconnected:
|
1789 | 82463074 | Iustin Pop | msg = ("drbd%d: device did not react to the"
|
1790 | cf8df3f3 | Iustin Pop | " 'disconnect' command in a timely manner")
|
1791 | cf8df3f3 | Iustin Pop | else:
|
1792 | 82463074 | Iustin Pop | msg = "drbd%d: can't shutdown network, even after multiple retries"
|
1793 | def8e2f6 | Michael Hanselmann | |
1794 | 82463074 | Iustin Pop | _ThrowError(msg, self.minor)
|
1795 | cf8df3f3 | Iustin Pop | |
1796 | def8e2f6 | Michael Hanselmann | reconfig_time = time.time() - start_time |
1797 | def8e2f6 | Michael Hanselmann | if reconfig_time > (self._NET_RECONFIG_TIMEOUT * 0.25): |
1798 | 82463074 | Iustin Pop | logging.info("drbd%d: DisconnectNet: detach took %.3f seconds",
|
1799 | 82463074 | Iustin Pop | self.minor, reconfig_time)
|
1800 | cf8df3f3 | Iustin Pop | |
1801 | cf8df3f3 | Iustin Pop | def AttachNet(self, multimaster): |
1802 | cf8df3f3 | Iustin Pop | """Reconnects the network.
|
1803 | cf8df3f3 | Iustin Pop |
|
1804 | cf8df3f3 | Iustin Pop | This method connects the network side of the device with a
|
1805 | cf8df3f3 | Iustin Pop | specified multi-master flag. The device needs to be 'Standalone'
|
1806 | cf8df3f3 | Iustin Pop | but have valid network configuration data.
|
1807 | cf8df3f3 | Iustin Pop |
|
1808 | cf8df3f3 | Iustin Pop | Args:
|
1809 | cf8df3f3 | Iustin Pop | - multimaster: init the network in dual-primary mode
|
1810 | cf8df3f3 | Iustin Pop |
|
1811 | cf8df3f3 | Iustin Pop | """
|
1812 | cf8df3f3 | Iustin Pop | if self.minor is None: |
1813 | 82463074 | Iustin Pop | _ThrowError("drbd%d: device not attached in AttachNet", self._aminor) |
1814 | cf8df3f3 | Iustin Pop | |
1815 | cf8df3f3 | Iustin Pop | if None in (self._lhost, self._lport, self._rhost, self._rport): |
1816 | 82463074 | Iustin Pop | _ThrowError("drbd%d: missing network info in AttachNet()", self.minor) |
1817 | cf8df3f3 | Iustin Pop | |
1818 | cf8df3f3 | Iustin Pop | status = self.GetProcStatus()
|
1819 | cf8df3f3 | Iustin Pop | |
1820 | cf8df3f3 | Iustin Pop | if not status.is_standalone: |
1821 | 82463074 | Iustin Pop | _ThrowError("drbd%d: device is not standalone in AttachNet", self.minor) |
1822 | cf8df3f3 | Iustin Pop | |
1823 | 1063abd1 | Iustin Pop | self._AssembleNet(self.minor, |
1824 | 1063abd1 | Iustin Pop | (self._lhost, self._lport, self._rhost, self._rport), |
1825 | 1063abd1 | Iustin Pop | constants.DRBD_NET_PROTOCOL, dual_pri=multimaster, |
1826 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1827 | cf8df3f3 | Iustin Pop | |
1828 | a2cfdea2 | Iustin Pop | def Attach(self): |
1829 | 2d0c8319 | Iustin Pop | """Check if our minor is configured.
|
1830 | 2d0c8319 | Iustin Pop |
|
1831 | 2d0c8319 | Iustin Pop | This doesn't do any device configurations - it only checks if the
|
1832 | 2d0c8319 | Iustin Pop | minor is in a state different from Unconfigured.
|
1833 | 2d0c8319 | Iustin Pop |
|
1834 | 2d0c8319 | Iustin Pop | Note that this function will not change the state of the system in
|
1835 | 2d0c8319 | Iustin Pop | any way (except in case of side-effects caused by reading from
|
1836 | 2d0c8319 | Iustin Pop | /proc).
|
1837 | 2d0c8319 | Iustin Pop |
|
1838 | 2d0c8319 | Iustin Pop | """
|
1839 | 6d2e83d5 | Iustin Pop | used_devs = self.GetUsedDevs()
|
1840 | 2d0c8319 | Iustin Pop | if self._aminor in used_devs: |
1841 | 2d0c8319 | Iustin Pop | minor = self._aminor
|
1842 | 2d0c8319 | Iustin Pop | else:
|
1843 | 2d0c8319 | Iustin Pop | minor = None
|
1844 | 2d0c8319 | Iustin Pop | |
1845 | 2d0c8319 | Iustin Pop | self._SetFromMinor(minor)
|
1846 | 2d0c8319 | Iustin Pop | return minor is not None |
1847 | 2d0c8319 | Iustin Pop | |
1848 | 2d0c8319 | Iustin Pop | def Assemble(self): |
1849 | 2d0c8319 | Iustin Pop | """Assemble the drbd.
|
1850 | 2d0c8319 | Iustin Pop |
|
1851 | 2d0c8319 | Iustin Pop | Method:
|
1852 | 2d0c8319 | Iustin Pop | - if we have a configured device, we try to ensure that it matches
|
1853 | 2d0c8319 | Iustin Pop | our config
|
1854 | 2d0c8319 | Iustin Pop | - if not, we create it from zero
|
1855 | d529599f | Andrea Spadaccini | - anyway, set the device parameters
|
1856 | 2d0c8319 | Iustin Pop |
|
1857 | 2d0c8319 | Iustin Pop | """
|
1858 | 1063abd1 | Iustin Pop | super(DRBD8, self).Assemble() |
1859 | 2d0c8319 | Iustin Pop | |
1860 | 2d0c8319 | Iustin Pop | self.Attach()
|
1861 | 2d0c8319 | Iustin Pop | if self.minor is None: |
1862 | 2d0c8319 | Iustin Pop | # local device completely unconfigured
|
1863 | 1063abd1 | Iustin Pop | self._FastAssemble()
|
1864 | 2d0c8319 | Iustin Pop | else:
|
1865 | 2d0c8319 | Iustin Pop | # we have to recheck the local and network status and try to fix
|
1866 | 2d0c8319 | Iustin Pop | # the device
|
1867 | 1063abd1 | Iustin Pop | self._SlowAssemble()
|
1868 | 2d0c8319 | Iustin Pop | |
1869 | f2f57b6e | Andrea Spadaccini | self.SetSyncParams(self.params) |
1870 | d529599f | Andrea Spadaccini | |
1871 | 2d0c8319 | Iustin Pop | def _SlowAssemble(self): |
1872 | 2d0c8319 | Iustin Pop | """Assembles the DRBD device from a (partially) configured device.
|
1873 | a2cfdea2 | Iustin Pop |
|
1874 | a2cfdea2 | Iustin Pop | In case of partially attached (local device matches but no network
|
1875 | a2cfdea2 | Iustin Pop | setup), we perform the network attach. If successful, we re-test
|
1876 | a2cfdea2 | Iustin Pop | the attach if can return success.
|
1877 | a2cfdea2 | Iustin Pop |
|
1878 | a2cfdea2 | Iustin Pop | """
|
1879 | 527a15ac | Iustin Pop | # TODO: Rewrite to not use a for loop just because there is 'break'
|
1880 | b459a848 | Andrea Spadaccini | # pylint: disable=W0631
|
1881 | 1063abd1 | Iustin Pop | net_data = (self._lhost, self._lport, self._rhost, self._rport) |
1882 | a1578d63 | Iustin Pop | for minor in (self._aminor,): |
1883 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(minor)) |
1884 | a2cfdea2 | Iustin Pop | match_l = self._MatchesLocal(info)
|
1885 | a2cfdea2 | Iustin Pop | match_r = self._MatchesNet(info)
|
1886 | 1063abd1 | Iustin Pop | |
1887 | a2cfdea2 | Iustin Pop | if match_l and match_r: |
1888 | 1063abd1 | Iustin Pop | # everything matches
|
1889 | a2cfdea2 | Iustin Pop | break
|
1890 | 1063abd1 | Iustin Pop | |
1891 | a2cfdea2 | Iustin Pop | if match_l and not match_r and "local_addr" not in info: |
1892 | 1063abd1 | Iustin Pop | # disk matches, but not attached to network, attach and recheck
|
1893 | 1063abd1 | Iustin Pop | self._AssembleNet(minor, net_data, constants.DRBD_NET_PROTOCOL,
|
1894 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1895 | 1063abd1 | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1896 | 1063abd1 | Iustin Pop | break
|
1897 | 1063abd1 | Iustin Pop | else:
|
1898 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: network attach successful, but 'drbdsetup"
|
1899 | 1063abd1 | Iustin Pop | " show' disagrees", minor)
|
1900 | 1063abd1 | Iustin Pop | |
1901 | fc1dc9d7 | Iustin Pop | if match_r and "local_dev" not in info: |
1902 | 1063abd1 | Iustin Pop | # no local disk, but network attached and it matches
|
1903 | 1063abd1 | Iustin Pop | self._AssembleLocal(minor, self._children[0].dev_path, |
1904 | f069addf | Iustin Pop | self._children[1].dev_path, self.size) |
1905 | 1063abd1 | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1906 | 1063abd1 | Iustin Pop | break
|
1907 | 1063abd1 | Iustin Pop | else:
|
1908 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: disk attach successful, but 'drbdsetup"
|
1909 | 1063abd1 | Iustin Pop | " show' disagrees", minor)
|
1910 | bf25af3b | Iustin Pop | |
1911 | bf25af3b | Iustin Pop | # this case must be considered only if we actually have local
|
1912 | bf25af3b | Iustin Pop | # storage, i.e. not in diskless mode, because all diskless
|
1913 | bf25af3b | Iustin Pop | # devices are equal from the point of view of local
|
1914 | bf25af3b | Iustin Pop | # configuration
|
1915 | bf25af3b | Iustin Pop | if (match_l and "local_dev" in info and |
1916 | bf25af3b | Iustin Pop | not match_r and "local_addr" in info): |
1917 | 9cdbe77f | Iustin Pop | # strange case - the device network part points to somewhere
|
1918 | 9cdbe77f | Iustin Pop | # else, even though its local storage is ours; as we own the
|
1919 | 9cdbe77f | Iustin Pop | # drbd space, we try to disconnect from the remote peer and
|
1920 | 9cdbe77f | Iustin Pop | # reconnect to our correct one
|
1921 | 1063abd1 | Iustin Pop | try:
|
1922 | 1063abd1 | Iustin Pop | self._ShutdownNet(minor)
|
1923 | 1063abd1 | Iustin Pop | except errors.BlockDeviceError, err:
|
1924 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: device has correct local storage, wrong"
|
1925 | 33bc6f01 | Iustin Pop | " remote peer and is unable to disconnect in order"
|
1926 | 33bc6f01 | Iustin Pop | " to attach to the correct peer: %s", minor, str(err)) |
1927 | 9cdbe77f | Iustin Pop | # note: _AssembleNet also handles the case when we don't want
|
1928 | 9cdbe77f | Iustin Pop | # local storage (i.e. one or more of the _[lr](host|port) is
|
1929 | 9cdbe77f | Iustin Pop | # None)
|
1930 | 1063abd1 | Iustin Pop | self._AssembleNet(minor, net_data, constants.DRBD_NET_PROTOCOL,
|
1931 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1932 | 1063abd1 | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1933 | 9cdbe77f | Iustin Pop | break
|
1934 | 1063abd1 | Iustin Pop | else:
|
1935 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: network attach successful, but 'drbdsetup"
|
1936 | 1063abd1 | Iustin Pop | " show' disagrees", minor)
|
1937 | 9cdbe77f | Iustin Pop | |
1938 | a2cfdea2 | Iustin Pop | else:
|
1939 | a2cfdea2 | Iustin Pop | minor = None
|
1940 | a2cfdea2 | Iustin Pop | |
1941 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1942 | 1063abd1 | Iustin Pop | if minor is None: |
1943 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: cannot activate, unknown or unhandled reason",
|
1944 | 1063abd1 | Iustin Pop | self._aminor)
|
1945 | a2cfdea2 | Iustin Pop | |
1946 | 2d0c8319 | Iustin Pop | def _FastAssemble(self): |
1947 | 2d0c8319 | Iustin Pop | """Assemble the drbd device from zero.
|
1948 | a2cfdea2 | Iustin Pop |
|
1949 | 2d0c8319 | Iustin Pop | This is run when in Assemble we detect our minor is unused.
|
1950 | a2cfdea2 | Iustin Pop |
|
1951 | a2cfdea2 | Iustin Pop | """
|
1952 | a1578d63 | Iustin Pop | minor = self._aminor
|
1953 | fc1dc9d7 | Iustin Pop | if self._children and self._children[0] and self._children[1]: |
1954 | 1063abd1 | Iustin Pop | self._AssembleLocal(minor, self._children[0].dev_path, |
1955 | f069addf | Iustin Pop | self._children[1].dev_path, self.size) |
1956 | a2cfdea2 | Iustin Pop | if self._lhost and self._lport and self._rhost and self._rport: |
1957 | 1063abd1 | Iustin Pop | self._AssembleNet(minor,
|
1958 | 1063abd1 | Iustin Pop | (self._lhost, self._lport, self._rhost, self._rport), |
1959 | 1063abd1 | Iustin Pop | constants.DRBD_NET_PROTOCOL, |
1960 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1961 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1962 | a2cfdea2 | Iustin Pop | |
1963 | a2cfdea2 | Iustin Pop | @classmethod
|
1964 | b00b95dd | Iustin Pop | def _ShutdownLocal(cls, minor): |
1965 | b00b95dd | Iustin Pop | """Detach from the local device.
|
1966 | b00b95dd | Iustin Pop |
|
1967 | b00b95dd | Iustin Pop | I/Os will continue to be served from the remote device. If we
|
1968 | b00b95dd | Iustin Pop | don't have a remote device, this operation will fail.
|
1969 | b00b95dd | Iustin Pop |
|
1970 | b00b95dd | Iustin Pop | """
|
1971 | b00b95dd | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
1972 | b00b95dd | Iustin Pop | if result.failed:
|
1973 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't detach local disk: %s", minor, result.output)
|
1974 | b00b95dd | Iustin Pop | |
1975 | b00b95dd | Iustin Pop | @classmethod
|
1976 | f3e513ad | Iustin Pop | def _ShutdownNet(cls, minor): |
1977 | f3e513ad | Iustin Pop | """Disconnect from the remote peer.
|
1978 | f3e513ad | Iustin Pop |
|
1979 | f3e513ad | Iustin Pop | This fails if we don't have a local device.
|
1980 | f3e513ad | Iustin Pop |
|
1981 | f3e513ad | Iustin Pop | """
|
1982 | f3e513ad | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
1983 | a8459f1c | Iustin Pop | if result.failed:
|
1984 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't shutdown network: %s", minor, result.output)
|
1985 | f3e513ad | Iustin Pop | |
1986 | f3e513ad | Iustin Pop | @classmethod
|
1987 | a2cfdea2 | Iustin Pop | def _ShutdownAll(cls, minor): |
1988 | a2cfdea2 | Iustin Pop | """Deactivate the device.
|
1989 | a2cfdea2 | Iustin Pop |
|
1990 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1991 | a2cfdea2 | Iustin Pop |
|
1992 | a2cfdea2 | Iustin Pop | """
|
1993 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "down"]) |
1994 | a2cfdea2 | Iustin Pop | if result.failed:
|
1995 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: can't shutdown drbd device: %s",
|
1996 | 33bc6f01 | Iustin Pop | minor, result.output) |
1997 | a2cfdea2 | Iustin Pop | |
1998 | a2cfdea2 | Iustin Pop | def Shutdown(self): |
1999 | a2cfdea2 | Iustin Pop | """Shutdown the DRBD device.
|
2000 | a2cfdea2 | Iustin Pop |
|
2001 | a2cfdea2 | Iustin Pop | """
|
2002 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
2003 | 746f7476 | Iustin Pop | logging.info("drbd%d: not attached during Shutdown()", self._aminor) |
2004 | 746f7476 | Iustin Pop | return
|
2005 | 746f7476 | Iustin Pop | minor = self.minor
|
2006 | a2cfdea2 | Iustin Pop | self.minor = None |
2007 | a2cfdea2 | Iustin Pop | self.dev_path = None |
2008 | 746f7476 | Iustin Pop | self._ShutdownAll(minor)
|
2009 | a2cfdea2 | Iustin Pop | |
2010 | a2cfdea2 | Iustin Pop | def Remove(self): |
2011 | a2cfdea2 | Iustin Pop | """Stub remove for DRBD devices.
|
2012 | a2cfdea2 | Iustin Pop |
|
2013 | a2cfdea2 | Iustin Pop | """
|
2014 | 0c6c04ec | Iustin Pop | self.Shutdown()
|
2015 | a2cfdea2 | Iustin Pop | |
2016 | a2cfdea2 | Iustin Pop | @classmethod
|
2017 | 94dcbdb0 | Andrea Spadaccini | def Create(cls, unique_id, children, size, params): |
2018 | a2cfdea2 | Iustin Pop | """Create a new DRBD8 device.
|
2019 | a2cfdea2 | Iustin Pop |
|
2020 | a2cfdea2 | Iustin Pop | Since DRBD devices are not created per se, just assembled, this
|
2021 | a2cfdea2 | Iustin Pop | function only initializes the metadata.
|
2022 | a2cfdea2 | Iustin Pop |
|
2023 | a2cfdea2 | Iustin Pop | """
|
2024 | a2cfdea2 | Iustin Pop | if len(children) != 2: |
2025 | a2cfdea2 | Iustin Pop | raise errors.ProgrammerError("Invalid setup for the drbd device") |
2026 | 767d52d3 | Iustin Pop | # check that the minor is unused
|
2027 | 767d52d3 | Iustin Pop | aminor = unique_id[4]
|
2028 | 767d52d3 | Iustin Pop | proc_info = cls._MassageProcData(cls._GetProcData()) |
2029 | 767d52d3 | Iustin Pop | if aminor in proc_info: |
2030 | 767d52d3 | Iustin Pop | status = DRBD8Status(proc_info[aminor]) |
2031 | 767d52d3 | Iustin Pop | in_use = status.is_in_use |
2032 | 767d52d3 | Iustin Pop | else:
|
2033 | 767d52d3 | Iustin Pop | in_use = False
|
2034 | 767d52d3 | Iustin Pop | if in_use:
|
2035 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: minor is already in use at Create() time", aminor)
|
2036 | a2cfdea2 | Iustin Pop | meta = children[1]
|
2037 | a2cfdea2 | Iustin Pop | meta.Assemble() |
2038 | a2cfdea2 | Iustin Pop | if not meta.Attach(): |
2039 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: can't attach to meta device '%s'",
|
2040 | 33bc6f01 | Iustin Pop | aminor, meta) |
2041 | 9c793cfb | Iustin Pop | cls._CheckMetaSize(meta.dev_path) |
2042 | 3b559640 | Iustin Pop | cls._InitMeta(aminor, meta.dev_path) |
2043 | 94dcbdb0 | Andrea Spadaccini | return cls(unique_id, children, size, params)
|
2044 | a2cfdea2 | Iustin Pop | |
2045 | 7fe23d47 | Iustin Pop | def Grow(self, amount, dryrun): |
2046 | 1005d816 | Iustin Pop | """Resize the DRBD device and its backing storage.
|
2047 | 1005d816 | Iustin Pop |
|
2048 | 1005d816 | Iustin Pop | """
|
2049 | 1005d816 | Iustin Pop | if self.minor is None: |
2050 | 82463074 | Iustin Pop | _ThrowError("drbd%d: Grow called while not attached", self._aminor) |
2051 | 1005d816 | Iustin Pop | if len(self._children) != 2 or None in self._children: |
2052 | 82463074 | Iustin Pop | _ThrowError("drbd%d: cannot grow diskless device", self.minor) |
2053 | 7fe23d47 | Iustin Pop | self._children[0].Grow(amount, dryrun) |
2054 | 7fe23d47 | Iustin Pop | if dryrun:
|
2055 | 7fe23d47 | Iustin Pop | # DRBD does not support dry-run mode, so we'll return here
|
2056 | 7fe23d47 | Iustin Pop | return
|
2057 | 38256320 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "resize", "-s", |
2058 | 38256320 | Iustin Pop | "%dm" % (self.size + amount)]) |
2059 | 1005d816 | Iustin Pop | if result.failed:
|
2060 | 82463074 | Iustin Pop | _ThrowError("drbd%d: resize failed: %s", self.minor, result.output) |
2061 | 1005d816 | Iustin Pop | |
2062 | a8083063 | Iustin Pop | |
2063 | 6f695a2e | Manuel Franceschini | class FileStorage(BlockDev): |
2064 | 6f695a2e | Manuel Franceschini | """File device.
|
2065 | abdf0113 | Iustin Pop |
|
2066 | 6f695a2e | Manuel Franceschini | This class represents the a file storage backend device.
|
2067 | 6f695a2e | Manuel Franceschini |
|
2068 | 6f695a2e | Manuel Franceschini | The unique_id for the file device is a (file_driver, file_path) tuple.
|
2069 | abdf0113 | Iustin Pop |
|
2070 | 6f695a2e | Manuel Franceschini | """
|
2071 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
2072 | 6f695a2e | Manuel Franceschini | """Initalizes a file device backend.
|
2073 | 6f695a2e | Manuel Franceschini |
|
2074 | 6f695a2e | Manuel Franceschini | """
|
2075 | 6f695a2e | Manuel Franceschini | if children:
|
2076 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("Invalid setup for file device") |
2077 | 94dcbdb0 | Andrea Spadaccini | super(FileStorage, self).__init__(unique_id, children, size, params) |
2078 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
2079 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
2080 | 6f695a2e | Manuel Franceschini | self.driver = unique_id[0] |
2081 | 6f695a2e | Manuel Franceschini | self.dev_path = unique_id[1] |
2082 | ecb091e3 | Iustin Pop | self.Attach()
|
2083 | 6f695a2e | Manuel Franceschini | |
2084 | 6f695a2e | Manuel Franceschini | def Assemble(self): |
2085 | 6f695a2e | Manuel Franceschini | """Assemble the device.
|
2086 | 6f695a2e | Manuel Franceschini |
|
2087 | 6f695a2e | Manuel Franceschini | Checks whether the file device exists, raises BlockDeviceError otherwise.
|
2088 | 6f695a2e | Manuel Franceschini |
|
2089 | 6f695a2e | Manuel Franceschini | """
|
2090 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
2091 | 1063abd1 | Iustin Pop | _ThrowError("File device '%s' does not exist" % self.dev_path) |
2092 | 6f695a2e | Manuel Franceschini | |
2093 | 6f695a2e | Manuel Franceschini | def Shutdown(self): |
2094 | 6f695a2e | Manuel Franceschini | """Shutdown the device.
|
2095 | 6f695a2e | Manuel Franceschini |
|
2096 | 5bbd3f7f | Michael Hanselmann | This is a no-op for the file type, as we don't deactivate
|
2097 | 6f695a2e | Manuel Franceschini | the file on shutdown.
|
2098 | 6f695a2e | Manuel Franceschini |
|
2099 | 6f695a2e | Manuel Franceschini | """
|
2100 | 746f7476 | Iustin Pop | pass
|
2101 | 6f695a2e | Manuel Franceschini | |
2102 | 6f695a2e | Manuel Franceschini | def Open(self, force=False): |
2103 | 6f695a2e | Manuel Franceschini | """Make the device ready for I/O.
|
2104 | 6f695a2e | Manuel Franceschini |
|
2105 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
2106 | 6f695a2e | Manuel Franceschini |
|
2107 | 6f695a2e | Manuel Franceschini | """
|
2108 | 6f695a2e | Manuel Franceschini | pass
|
2109 | 6f695a2e | Manuel Franceschini | |
2110 | 6f695a2e | Manuel Franceschini | def Close(self): |
2111 | 6f695a2e | Manuel Franceschini | """Notifies that the device will no longer be used for I/O.
|
2112 | 6f695a2e | Manuel Franceschini |
|
2113 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
2114 | 6f695a2e | Manuel Franceschini |
|
2115 | 6f695a2e | Manuel Franceschini | """
|
2116 | 6f695a2e | Manuel Franceschini | pass
|
2117 | 6f695a2e | Manuel Franceschini | |
2118 | 6f695a2e | Manuel Franceschini | def Remove(self): |
2119 | 6f695a2e | Manuel Franceschini | """Remove the file backing the block device.
|
2120 | 6f695a2e | Manuel Franceschini |
|
2121 | c41eea6e | Iustin Pop | @rtype: boolean
|
2122 | c41eea6e | Iustin Pop | @return: True if the removal was successful
|
2123 | 6f695a2e | Manuel Franceschini |
|
2124 | 6f695a2e | Manuel Franceschini | """
|
2125 | 6f695a2e | Manuel Franceschini | try:
|
2126 | 6f695a2e | Manuel Franceschini | os.remove(self.dev_path)
|
2127 | 6f695a2e | Manuel Franceschini | except OSError, err: |
2128 | 0c6c04ec | Iustin Pop | if err.errno != errno.ENOENT:
|
2129 | 0c6c04ec | Iustin Pop | _ThrowError("Can't remove file '%s': %s", self.dev_path, err) |
2130 | 6f695a2e | Manuel Franceschini | |
2131 | bbe4cc16 | Iustin Pop | def Rename(self, new_id): |
2132 | bbe4cc16 | Iustin Pop | """Renames the file.
|
2133 | bbe4cc16 | Iustin Pop |
|
2134 | bbe4cc16 | Iustin Pop | """
|
2135 | bbe4cc16 | Iustin Pop | # TODO: implement rename for file-based storage
|
2136 | bbe4cc16 | Iustin Pop | _ThrowError("Rename is not supported for file-based storage")
|
2137 | bbe4cc16 | Iustin Pop | |
2138 | 7fe23d47 | Iustin Pop | def Grow(self, amount, dryrun): |
2139 | bbe4cc16 | Iustin Pop | """Grow the file
|
2140 | bbe4cc16 | Iustin Pop |
|
2141 | bbe4cc16 | Iustin Pop | @param amount: the amount (in mebibytes) to grow with
|
2142 | bbe4cc16 | Iustin Pop |
|
2143 | bbe4cc16 | Iustin Pop | """
|
2144 | 91e2d9ec | Guido Trotter | # Check that the file exists
|
2145 | 91e2d9ec | Guido Trotter | self.Assemble()
|
2146 | 91e2d9ec | Guido Trotter | current_size = self.GetActualSize()
|
2147 | 91e2d9ec | Guido Trotter | new_size = current_size + amount * 1024 * 1024 |
2148 | 91e2d9ec | Guido Trotter | assert new_size > current_size, "Cannot Grow with a negative amount" |
2149 | 7fe23d47 | Iustin Pop | # We can't really simulate the growth
|
2150 | 7fe23d47 | Iustin Pop | if dryrun:
|
2151 | 7fe23d47 | Iustin Pop | return
|
2152 | 91e2d9ec | Guido Trotter | try:
|
2153 | 91e2d9ec | Guido Trotter | f = open(self.dev_path, "a+") |
2154 | 91e2d9ec | Guido Trotter | f.truncate(new_size) |
2155 | 91e2d9ec | Guido Trotter | f.close() |
2156 | 91e2d9ec | Guido Trotter | except EnvironmentError, err: |
2157 | 91e2d9ec | Guido Trotter | _ThrowError("Error in file growth: %", str(err)) |
2158 | bbe4cc16 | Iustin Pop | |
2159 | 6f695a2e | Manuel Franceschini | def Attach(self): |
2160 | 6f695a2e | Manuel Franceschini | """Attach to an existing file.
|
2161 | 6f695a2e | Manuel Franceschini |
|
2162 | 6f695a2e | Manuel Franceschini | Check if this file already exists.
|
2163 | 6f695a2e | Manuel Franceschini |
|
2164 | c41eea6e | Iustin Pop | @rtype: boolean
|
2165 | c41eea6e | Iustin Pop | @return: True if file exists
|
2166 | 6f695a2e | Manuel Franceschini |
|
2167 | 6f695a2e | Manuel Franceschini | """
|
2168 | ecb091e3 | Iustin Pop | self.attached = os.path.exists(self.dev_path) |
2169 | ecb091e3 | Iustin Pop | return self.attached |
2170 | 6f695a2e | Manuel Franceschini | |
2171 | fcff3897 | Iustin Pop | def GetActualSize(self): |
2172 | fcff3897 | Iustin Pop | """Return the actual disk size.
|
2173 | fcff3897 | Iustin Pop |
|
2174 | fcff3897 | Iustin Pop | @note: the device needs to be active when this is called
|
2175 | fcff3897 | Iustin Pop |
|
2176 | fcff3897 | Iustin Pop | """
|
2177 | fcff3897 | Iustin Pop | assert self.attached, "BlockDevice not attached in GetActualSize()" |
2178 | fcff3897 | Iustin Pop | try:
|
2179 | fcff3897 | Iustin Pop | st = os.stat(self.dev_path)
|
2180 | fcff3897 | Iustin Pop | return st.st_size
|
2181 | fcff3897 | Iustin Pop | except OSError, err: |
2182 | fcff3897 | Iustin Pop | _ThrowError("Can't stat %s: %s", self.dev_path, err) |
2183 | fcff3897 | Iustin Pop | |
2184 | 6f695a2e | Manuel Franceschini | @classmethod
|
2185 | 94dcbdb0 | Andrea Spadaccini | def Create(cls, unique_id, children, size, params): |
2186 | 6f695a2e | Manuel Franceschini | """Create a new file.
|
2187 | 6f695a2e | Manuel Franceschini |
|
2188 | c41eea6e | Iustin Pop | @param size: the size of file in MiB
|
2189 | 6f695a2e | Manuel Franceschini |
|
2190 | c41eea6e | Iustin Pop | @rtype: L{bdev.FileStorage}
|
2191 | c41eea6e | Iustin Pop | @return: an instance of FileStorage
|
2192 | 6f695a2e | Manuel Franceschini |
|
2193 | 6f695a2e | Manuel Franceschini | """
|
2194 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
2195 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
2196 | 6f695a2e | Manuel Franceschini | dev_path = unique_id[1]
|
2197 | 6f695a2e | Manuel Franceschini | try:
|
2198 | cdeefd9b | Guido Trotter | fd = os.open(dev_path, os.O_RDWR | os.O_CREAT | os.O_EXCL) |
2199 | cdeefd9b | Guido Trotter | f = os.fdopen(fd, "w")
|
2200 | 6f695a2e | Manuel Franceschini | f.truncate(size * 1024 * 1024) |
2201 | 6f695a2e | Manuel Franceschini | f.close() |
2202 | cdeefd9b | Guido Trotter | except EnvironmentError, err: |
2203 | cdeefd9b | Guido Trotter | if err.errno == errno.EEXIST:
|
2204 | cdeefd9b | Guido Trotter | _ThrowError("File already existing: %s", dev_path)
|
2205 | 82463074 | Iustin Pop | _ThrowError("Error in file creation: %", str(err)) |
2206 | 6f695a2e | Manuel Franceschini | |
2207 | 94dcbdb0 | Andrea Spadaccini | return FileStorage(unique_id, children, size, params)
|
2208 | 6f695a2e | Manuel Franceschini | |
2209 | 6f695a2e | Manuel Franceschini | |
2210 | b6135bbc | Apollon Oikonomopoulos | class PersistentBlockDevice(BlockDev): |
2211 | b6135bbc | Apollon Oikonomopoulos | """A block device with persistent node
|
2212 | b6135bbc | Apollon Oikonomopoulos |
|
2213 | b6135bbc | Apollon Oikonomopoulos | May be either directly attached, or exposed through DM (e.g. dm-multipath).
|
2214 | b6135bbc | Apollon Oikonomopoulos | udev helpers are probably required to give persistent, human-friendly
|
2215 | b6135bbc | Apollon Oikonomopoulos | names.
|
2216 | b6135bbc | Apollon Oikonomopoulos |
|
2217 | b6135bbc | Apollon Oikonomopoulos | For the time being, pathnames are required to lie under /dev.
|
2218 | b6135bbc | Apollon Oikonomopoulos |
|
2219 | b6135bbc | Apollon Oikonomopoulos | """
|
2220 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
2221 | b6135bbc | Apollon Oikonomopoulos | """Attaches to a static block device.
|
2222 | b6135bbc | Apollon Oikonomopoulos |
|
2223 | b6135bbc | Apollon Oikonomopoulos | The unique_id is a path under /dev.
|
2224 | b6135bbc | Apollon Oikonomopoulos |
|
2225 | b6135bbc | Apollon Oikonomopoulos | """
|
2226 | 94dcbdb0 | Andrea Spadaccini | super(PersistentBlockDevice, self).__init__(unique_id, children, size, |
2227 | 94dcbdb0 | Andrea Spadaccini | params) |
2228 | b6135bbc | Apollon Oikonomopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
2229 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
2230 | b6135bbc | Apollon Oikonomopoulos | self.dev_path = unique_id[1] |
2231 | d0c8c01d | Iustin Pop | if not os.path.realpath(self.dev_path).startswith("/dev/"): |
2232 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Full path '%s' lies outside /dev" % |
2233 | b6135bbc | Apollon Oikonomopoulos | os.path.realpath(self.dev_path))
|
2234 | b6135bbc | Apollon Oikonomopoulos | # TODO: this is just a safety guard checking that we only deal with devices
|
2235 | b6135bbc | Apollon Oikonomopoulos | # we know how to handle. In the future this will be integrated with
|
2236 | b6135bbc | Apollon Oikonomopoulos | # external storage backends and possible values will probably be collected
|
2237 | b6135bbc | Apollon Oikonomopoulos | # from the cluster configuration.
|
2238 | b6135bbc | Apollon Oikonomopoulos | if unique_id[0] != constants.BLOCKDEV_DRIVER_MANUAL: |
2239 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Got persistent block device of invalid type: %s" % |
2240 | b6135bbc | Apollon Oikonomopoulos | unique_id[0])
|
2241 | b6135bbc | Apollon Oikonomopoulos | |
2242 | b6135bbc | Apollon Oikonomopoulos | self.major = self.minor = None |
2243 | b6135bbc | Apollon Oikonomopoulos | self.Attach()
|
2244 | b6135bbc | Apollon Oikonomopoulos | |
2245 | b6135bbc | Apollon Oikonomopoulos | @classmethod
|
2246 | 94dcbdb0 | Andrea Spadaccini | def Create(cls, unique_id, children, size, params): |
2247 | b6135bbc | Apollon Oikonomopoulos | """Create a new device
|
2248 | b6135bbc | Apollon Oikonomopoulos |
|
2249 | b6135bbc | Apollon Oikonomopoulos | This is a noop, we only return a PersistentBlockDevice instance
|
2250 | b6135bbc | Apollon Oikonomopoulos |
|
2251 | b6135bbc | Apollon Oikonomopoulos | """
|
2252 | 94dcbdb0 | Andrea Spadaccini | return PersistentBlockDevice(unique_id, children, 0, params) |
2253 | b6135bbc | Apollon Oikonomopoulos | |
2254 | b6135bbc | Apollon Oikonomopoulos | def Remove(self): |
2255 | b6135bbc | Apollon Oikonomopoulos | """Remove a device
|
2256 | b6135bbc | Apollon Oikonomopoulos |
|
2257 | b6135bbc | Apollon Oikonomopoulos | This is a noop
|
2258 | b6135bbc | Apollon Oikonomopoulos |
|
2259 | b6135bbc | Apollon Oikonomopoulos | """
|
2260 | b6135bbc | Apollon Oikonomopoulos | pass
|
2261 | b6135bbc | Apollon Oikonomopoulos | |
2262 | b6135bbc | Apollon Oikonomopoulos | def Rename(self, new_id): |
2263 | b6135bbc | Apollon Oikonomopoulos | """Rename this device.
|
2264 | b6135bbc | Apollon Oikonomopoulos |
|
2265 | b6135bbc | Apollon Oikonomopoulos | """
|
2266 | b6135bbc | Apollon Oikonomopoulos | _ThrowError("Rename is not supported for PersistentBlockDev storage")
|
2267 | b6135bbc | Apollon Oikonomopoulos | |
2268 | b6135bbc | Apollon Oikonomopoulos | def Attach(self): |
2269 | b6135bbc | Apollon Oikonomopoulos | """Attach to an existing block device.
|
2270 | b6135bbc | Apollon Oikonomopoulos |
|
2271 | b6135bbc | Apollon Oikonomopoulos |
|
2272 | b6135bbc | Apollon Oikonomopoulos | """
|
2273 | b6135bbc | Apollon Oikonomopoulos | self.attached = False |
2274 | b6135bbc | Apollon Oikonomopoulos | try:
|
2275 | b6135bbc | Apollon Oikonomopoulos | st = os.stat(self.dev_path)
|
2276 | b6135bbc | Apollon Oikonomopoulos | except OSError, err: |
2277 | b6135bbc | Apollon Oikonomopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
2278 | b6135bbc | Apollon Oikonomopoulos | return False |
2279 | b6135bbc | Apollon Oikonomopoulos | |
2280 | b6135bbc | Apollon Oikonomopoulos | if not stat.S_ISBLK(st.st_mode): |
2281 | b6135bbc | Apollon Oikonomopoulos | logging.error("%s is not a block device", self.dev_path) |
2282 | b6135bbc | Apollon Oikonomopoulos | return False |
2283 | b6135bbc | Apollon Oikonomopoulos | |
2284 | b6135bbc | Apollon Oikonomopoulos | self.major = os.major(st.st_rdev)
|
2285 | b6135bbc | Apollon Oikonomopoulos | self.minor = os.minor(st.st_rdev)
|
2286 | b6135bbc | Apollon Oikonomopoulos | self.attached = True |
2287 | b6135bbc | Apollon Oikonomopoulos | |
2288 | b6135bbc | Apollon Oikonomopoulos | return True |
2289 | b6135bbc | Apollon Oikonomopoulos | |
2290 | b6135bbc | Apollon Oikonomopoulos | def Assemble(self): |
2291 | b6135bbc | Apollon Oikonomopoulos | """Assemble the device.
|
2292 | b6135bbc | Apollon Oikonomopoulos |
|
2293 | b6135bbc | Apollon Oikonomopoulos | """
|
2294 | b6135bbc | Apollon Oikonomopoulos | pass
|
2295 | b6135bbc | Apollon Oikonomopoulos | |
2296 | b6135bbc | Apollon Oikonomopoulos | def Shutdown(self): |
2297 | b6135bbc | Apollon Oikonomopoulos | """Shutdown the device.
|
2298 | b6135bbc | Apollon Oikonomopoulos |
|
2299 | b6135bbc | Apollon Oikonomopoulos | """
|
2300 | b6135bbc | Apollon Oikonomopoulos | pass
|
2301 | b6135bbc | Apollon Oikonomopoulos | |
2302 | b6135bbc | Apollon Oikonomopoulos | def Open(self, force=False): |
2303 | b6135bbc | Apollon Oikonomopoulos | """Make the device ready for I/O.
|
2304 | b6135bbc | Apollon Oikonomopoulos |
|
2305 | b6135bbc | Apollon Oikonomopoulos | """
|
2306 | b6135bbc | Apollon Oikonomopoulos | pass
|
2307 | b6135bbc | Apollon Oikonomopoulos | |
2308 | b6135bbc | Apollon Oikonomopoulos | def Close(self): |
2309 | b6135bbc | Apollon Oikonomopoulos | """Notifies that the device will no longer be used for I/O.
|
2310 | b6135bbc | Apollon Oikonomopoulos |
|
2311 | b6135bbc | Apollon Oikonomopoulos | """
|
2312 | b6135bbc | Apollon Oikonomopoulos | pass
|
2313 | b6135bbc | Apollon Oikonomopoulos | |
2314 | 7fe23d47 | Iustin Pop | def Grow(self, amount, dryrun): |
2315 | b6135bbc | Apollon Oikonomopoulos | """Grow the logical volume.
|
2316 | b6135bbc | Apollon Oikonomopoulos |
|
2317 | b6135bbc | Apollon Oikonomopoulos | """
|
2318 | b6135bbc | Apollon Oikonomopoulos | _ThrowError("Grow is not supported for PersistentBlockDev storage")
|
2319 | b6135bbc | Apollon Oikonomopoulos | |
2320 | b6135bbc | Apollon Oikonomopoulos | |
2321 | a8083063 | Iustin Pop | DEV_MAP = { |
2322 | fe96220b | Iustin Pop | constants.LD_LV: LogicalVolume, |
2323 | a1f445d3 | Iustin Pop | constants.LD_DRBD8: DRBD8, |
2324 | b6135bbc | Apollon Oikonomopoulos | constants.LD_BLOCKDEV: PersistentBlockDevice, |
2325 | a8083063 | Iustin Pop | } |
2326 | a8083063 | Iustin Pop | |
2327 | 4b97f902 | Apollon Oikonomopoulos | if constants.ENABLE_FILE_STORAGE or constants.ENABLE_SHARED_FILE_STORAGE: |
2328 | cb7c0198 | Iustin Pop | DEV_MAP[constants.LD_FILE] = FileStorage |
2329 | cb7c0198 | Iustin Pop | |
2330 | a8083063 | Iustin Pop | |
2331 | 94dcbdb0 | Andrea Spadaccini | def _VerifyDiskType(dev_type): |
2332 | 94dcbdb0 | Andrea Spadaccini | if dev_type not in DEV_MAP: |
2333 | 94dcbdb0 | Andrea Spadaccini | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
2334 | 94dcbdb0 | Andrea Spadaccini | |
2335 | 94dcbdb0 | Andrea Spadaccini | |
2336 | 94dcbdb0 | Andrea Spadaccini | def FindDevice(disk, children): |
2337 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
2338 | a8083063 | Iustin Pop |
|
2339 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
2340 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
2341 | a8083063 | Iustin Pop |
|
2342 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
2343 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to find
|
2344 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
2345 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
2346 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
2347 | 94dcbdb0 | Andrea Spadaccini |
|
2348 | a8083063 | Iustin Pop | """
|
2349 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
2350 | 94dcbdb0 | Andrea Spadaccini | dev_params = objects.FillDict(constants.DISK_LD_DEFAULTS[disk.dev_type], |
2351 | 94dcbdb0 | Andrea Spadaccini | disk.params) |
2352 | 94dcbdb0 | Andrea Spadaccini | device = DEV_MAP[disk.dev_type](disk.physical_id, children, disk.size, |
2353 | 94dcbdb0 | Andrea Spadaccini | dev_params) |
2354 | cb999543 | Iustin Pop | if not device.attached: |
2355 | a8083063 | Iustin Pop | return None |
2356 | ecb091e3 | Iustin Pop | return device
|
2357 | a8083063 | Iustin Pop | |
2358 | a8083063 | Iustin Pop | |
2359 | 94dcbdb0 | Andrea Spadaccini | def Assemble(disk, children): |
2360 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
2361 | a8083063 | Iustin Pop |
|
2362 | f96e3c4f | Iustin Pop | This will attach to assemble the device, as needed, to bring it
|
2363 | f96e3c4f | Iustin Pop | fully up. It must be safe to run on already-assembled devices.
|
2364 | a8083063 | Iustin Pop |
|
2365 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
2366 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to assemble
|
2367 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
2368 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
2369 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
2370 | 94dcbdb0 | Andrea Spadaccini |
|
2371 | a8083063 | Iustin Pop | """
|
2372 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
2373 | 94dcbdb0 | Andrea Spadaccini | dev_params = objects.FillDict(constants.DISK_LD_DEFAULTS[disk.dev_type], |
2374 | 94dcbdb0 | Andrea Spadaccini | disk.params) |
2375 | 94dcbdb0 | Andrea Spadaccini | device = DEV_MAP[disk.dev_type](disk.physical_id, children, disk.size, |
2376 | 94dcbdb0 | Andrea Spadaccini | dev_params) |
2377 | 1063abd1 | Iustin Pop | device.Assemble() |
2378 | a8083063 | Iustin Pop | return device
|
2379 | a8083063 | Iustin Pop | |
2380 | a8083063 | Iustin Pop | |
2381 | 94dcbdb0 | Andrea Spadaccini | def Create(disk, children): |
2382 | a8083063 | Iustin Pop | """Create a device.
|
2383 | a8083063 | Iustin Pop |
|
2384 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
2385 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to create
|
2386 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
2387 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
2388 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
2389 | 94dcbdb0 | Andrea Spadaccini |
|
2390 | a8083063 | Iustin Pop | """
|
2391 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
2392 | 94dcbdb0 | Andrea Spadaccini | dev_params = objects.FillDict(constants.DISK_LD_DEFAULTS[disk.dev_type], |
2393 | 94dcbdb0 | Andrea Spadaccini | disk.params) |
2394 | 94dcbdb0 | Andrea Spadaccini | device = DEV_MAP[disk.dev_type].Create(disk.physical_id, children, disk.size, |
2395 | 94dcbdb0 | Andrea Spadaccini | dev_params) |
2396 | a8083063 | Iustin Pop | return device |