root / lib / bdev.py @ 023e3296
History | View | Annotate | Download (49.4 kB)
1 | 2f31098c | Iustin Pop | #
|
---|---|---|---|
2 | a8083063 | Iustin Pop | #
|
3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
|
5 | a8083063 | Iustin Pop | #
|
6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
|
7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
|
8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
|
9 | a8083063 | Iustin Pop | # (at your option) any later version.
|
10 | a8083063 | Iustin Pop | #
|
11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
|
12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | a8083063 | Iustin Pop | # General Public License for more details.
|
15 | a8083063 | Iustin Pop | #
|
16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
|
17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
|
18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 | a8083063 | Iustin Pop | # 02110-1301, USA.
|
20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """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 | a2cfdea2 | Iustin Pop | import pyparsing as pyp |
28 | 6f695a2e | Manuel Franceschini | import os |
29 | 468c5f77 | Iustin Pop | import logging |
30 | a8083063 | Iustin Pop | |
31 | a8083063 | Iustin Pop | from ganeti import utils |
32 | a8083063 | Iustin Pop | from ganeti import errors |
33 | fe96220b | Iustin Pop | from ganeti import constants |
34 | a8083063 | Iustin Pop | |
35 | a8083063 | Iustin Pop | |
36 | a8083063 | Iustin Pop | class BlockDev(object): |
37 | a8083063 | Iustin Pop | """Block device abstract class.
|
38 | a8083063 | Iustin Pop |
|
39 | a8083063 | Iustin Pop | A block device can be in the following states:
|
40 | a8083063 | Iustin Pop | - not existing on the system, and by `Create()` it goes into:
|
41 | a8083063 | Iustin Pop | - existing but not setup/not active, and by `Assemble()` goes into:
|
42 | a8083063 | Iustin Pop | - active read-write and by `Open()` it goes into
|
43 | a8083063 | Iustin Pop | - online (=used, or ready for use)
|
44 | a8083063 | Iustin Pop |
|
45 | a8083063 | Iustin Pop | A device can also be online but read-only, however we are not using
|
46 | abdf0113 | Iustin Pop | the readonly state (LV has it, if needed in the future) and we are
|
47 | abdf0113 | Iustin Pop | usually looking at this like at a stack, so it's easier to
|
48 | abdf0113 | Iustin Pop | conceptualise the transition from not-existing to online and back
|
49 | a8083063 | Iustin Pop | like a linear one.
|
50 | a8083063 | Iustin Pop |
|
51 | a8083063 | Iustin Pop | The many different states of the device are due to the fact that we
|
52 | a8083063 | Iustin Pop | need to cover many device types:
|
53 | a8083063 | Iustin Pop | - logical volumes are created, lvchange -a y $lv, and used
|
54 | a8083063 | Iustin Pop | - drbd devices are attached to a local disk/remote peer and made primary
|
55 | a8083063 | Iustin Pop |
|
56 | a8083063 | Iustin Pop | A block device is identified by three items:
|
57 | a8083063 | Iustin Pop | - the /dev path of the device (dynamic)
|
58 | a8083063 | Iustin Pop | - a unique ID of the device (static)
|
59 | a8083063 | Iustin Pop | - it's major/minor pair (dynamic)
|
60 | a8083063 | Iustin Pop |
|
61 | a8083063 | Iustin Pop | Not all devices implement both the first two as distinct items. LVM
|
62 | a8083063 | Iustin Pop | logical volumes have their unique ID (the pair volume group, logical
|
63 | abdf0113 | Iustin Pop | volume name) in a 1-to-1 relation to the dev path. For DRBD devices,
|
64 | abdf0113 | Iustin Pop | the /dev path is again dynamic and the unique id is the pair (host1,
|
65 | abdf0113 | Iustin Pop | dev1), (host2, dev2).
|
66 | a8083063 | Iustin Pop |
|
67 | a8083063 | Iustin Pop | You can get to a device in two ways:
|
68 | a8083063 | Iustin Pop | - creating the (real) device, which returns you
|
69 | abdf0113 | Iustin Pop | an attached instance (lvcreate)
|
70 | a8083063 | Iustin Pop | - attaching of a python instance to an existing (real) device
|
71 | a8083063 | Iustin Pop |
|
72 | a8083063 | Iustin Pop | The second point, the attachement to a device, is different
|
73 | a8083063 | Iustin Pop | depending on whether the device is assembled or not. At init() time,
|
74 | a8083063 | Iustin Pop | we search for a device with the same unique_id as us. If found,
|
75 | a8083063 | Iustin Pop | good. It also means that the device is already assembled. If not,
|
76 | a8083063 | Iustin Pop | after assembly we'll have our correct major/minor.
|
77 | a8083063 | Iustin Pop |
|
78 | a8083063 | Iustin Pop | """
|
79 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
80 | a8083063 | Iustin Pop | self._children = children
|
81 | a8083063 | Iustin Pop | self.dev_path = None |
82 | a8083063 | Iustin Pop | self.unique_id = unique_id
|
83 | a8083063 | Iustin Pop | self.major = None |
84 | a8083063 | Iustin Pop | self.minor = None |
85 | cb999543 | Iustin Pop | self.attached = False |
86 | a8083063 | Iustin Pop | |
87 | a8083063 | Iustin Pop | def Assemble(self): |
88 | a8083063 | Iustin Pop | """Assemble the device from its components.
|
89 | a8083063 | Iustin Pop |
|
90 | a8083063 | Iustin Pop | If this is a plain block device (e.g. LVM) than assemble does
|
91 | a8083063 | Iustin Pop | nothing, as the LVM has no children and we don't put logical
|
92 | a8083063 | Iustin Pop | volumes offline.
|
93 | a8083063 | Iustin Pop |
|
94 | a8083063 | Iustin Pop | One guarantee is that after the device has been assembled, it
|
95 | a8083063 | Iustin Pop | knows its major/minor numbers. This allows other devices (usually
|
96 | a8083063 | Iustin Pop | parents) to probe correctly for their children.
|
97 | a8083063 | Iustin Pop |
|
98 | a8083063 | Iustin Pop | """
|
99 | a8083063 | Iustin Pop | status = True
|
100 | a8083063 | Iustin Pop | for child in self._children: |
101 | a8083063 | Iustin Pop | if not isinstance(child, BlockDev): |
102 | a8083063 | Iustin Pop | raise TypeError("Invalid child passed of type '%s'" % type(child)) |
103 | a8083063 | Iustin Pop | if not status: |
104 | a8083063 | Iustin Pop | break
|
105 | a8083063 | Iustin Pop | status = status and child.Assemble()
|
106 | a8083063 | Iustin Pop | if not status: |
107 | a8083063 | Iustin Pop | break
|
108 | fdbd668d | Iustin Pop | |
109 | fdbd668d | Iustin Pop | try:
|
110 | fdbd668d | Iustin Pop | child.Open() |
111 | fdbd668d | Iustin Pop | except errors.BlockDeviceError:
|
112 | fdbd668d | Iustin Pop | for child in self._children: |
113 | fdbd668d | Iustin Pop | child.Shutdown() |
114 | fdbd668d | Iustin Pop | raise
|
115 | a8083063 | Iustin Pop | |
116 | a8083063 | Iustin Pop | if not status: |
117 | a8083063 | Iustin Pop | for child in self._children: |
118 | a8083063 | Iustin Pop | child.Shutdown() |
119 | a8083063 | Iustin Pop | return status
|
120 | a8083063 | Iustin Pop | |
121 | a8083063 | Iustin Pop | def Attach(self): |
122 | a8083063 | Iustin Pop | """Find a device which matches our config and attach to it.
|
123 | a8083063 | Iustin Pop |
|
124 | a8083063 | Iustin Pop | """
|
125 | a8083063 | Iustin Pop | raise NotImplementedError |
126 | a8083063 | Iustin Pop | |
127 | a8083063 | Iustin Pop | def Close(self): |
128 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
129 | a8083063 | Iustin Pop |
|
130 | a8083063 | Iustin Pop | """
|
131 | a8083063 | Iustin Pop | raise NotImplementedError |
132 | a8083063 | Iustin Pop | |
133 | a8083063 | Iustin Pop | @classmethod
|
134 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
135 | a8083063 | Iustin Pop | """Create the device.
|
136 | a8083063 | Iustin Pop |
|
137 | a8083063 | Iustin Pop | If the device cannot be created, it will return None
|
138 | a8083063 | Iustin Pop | instead. Error messages go to the logging system.
|
139 | a8083063 | Iustin Pop |
|
140 | a8083063 | Iustin Pop | Note that for some devices, the unique_id is used, and for other,
|
141 | a8083063 | Iustin Pop | the children. The idea is that these two, taken together, are
|
142 | a8083063 | Iustin Pop | enough for both creation and assembly (later).
|
143 | a8083063 | Iustin Pop |
|
144 | a8083063 | Iustin Pop | """
|
145 | a8083063 | Iustin Pop | raise NotImplementedError |
146 | a8083063 | Iustin Pop | |
147 | a8083063 | Iustin Pop | def Remove(self): |
148 | a8083063 | Iustin Pop | """Remove this device.
|
149 | a8083063 | Iustin Pop |
|
150 | abdf0113 | Iustin Pop | This makes sense only for some of the device types: LV and file
|
151 | abdf0113 | Iustin Pop | storeage. Also note that if the device can't attach, the removal
|
152 | abdf0113 | Iustin Pop | can't be completed.
|
153 | a8083063 | Iustin Pop |
|
154 | a8083063 | Iustin Pop | """
|
155 | a8083063 | Iustin Pop | raise NotImplementedError |
156 | a8083063 | Iustin Pop | |
157 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
158 | f3e513ad | Iustin Pop | """Rename this device.
|
159 | f3e513ad | Iustin Pop |
|
160 | f3e513ad | Iustin Pop | This may or may not make sense for a given device type.
|
161 | f3e513ad | Iustin Pop |
|
162 | f3e513ad | Iustin Pop | """
|
163 | f3e513ad | Iustin Pop | raise NotImplementedError |
164 | f3e513ad | Iustin Pop | |
165 | a8083063 | Iustin Pop | def Open(self, force=False): |
166 | a8083063 | Iustin Pop | """Make the device ready for use.
|
167 | a8083063 | Iustin Pop |
|
168 | a8083063 | Iustin Pop | This makes the device ready for I/O. For now, just the DRBD
|
169 | a8083063 | Iustin Pop | devices need this.
|
170 | a8083063 | Iustin Pop |
|
171 | a8083063 | Iustin Pop | The force parameter signifies that if the device has any kind of
|
172 | a8083063 | Iustin Pop | --force thing, it should be used, we know what we are doing.
|
173 | a8083063 | Iustin Pop |
|
174 | a8083063 | Iustin Pop | """
|
175 | a8083063 | Iustin Pop | raise NotImplementedError |
176 | a8083063 | Iustin Pop | |
177 | a8083063 | Iustin Pop | def Shutdown(self): |
178 | a8083063 | Iustin Pop | """Shut down the device, freeing its children.
|
179 | a8083063 | Iustin Pop |
|
180 | a8083063 | Iustin Pop | This undoes the `Assemble()` work, except for the child
|
181 | a8083063 | Iustin Pop | assembling; as such, the children on the device are still
|
182 | a8083063 | Iustin Pop | assembled after this call.
|
183 | a8083063 | Iustin Pop |
|
184 | a8083063 | Iustin Pop | """
|
185 | a8083063 | Iustin Pop | raise NotImplementedError |
186 | a8083063 | Iustin Pop | |
187 | a8083063 | Iustin Pop | def SetSyncSpeed(self, speed): |
188 | a8083063 | Iustin Pop | """Adjust the sync speed of the mirror.
|
189 | a8083063 | Iustin Pop |
|
190 | a8083063 | Iustin Pop | In case this is not a mirroring device, this is no-op.
|
191 | a8083063 | Iustin Pop |
|
192 | a8083063 | Iustin Pop | """
|
193 | a8083063 | Iustin Pop | result = True
|
194 | a8083063 | Iustin Pop | if self._children: |
195 | a8083063 | Iustin Pop | for child in self._children: |
196 | a8083063 | Iustin Pop | result = result and child.SetSyncSpeed(speed)
|
197 | a8083063 | Iustin Pop | return result
|
198 | a8083063 | Iustin Pop | |
199 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
200 | a8083063 | Iustin Pop | """Returns the sync status of the device.
|
201 | a8083063 | Iustin Pop |
|
202 | a8083063 | Iustin Pop | If this device is a mirroring device, this function returns the
|
203 | a8083063 | Iustin Pop | status of the mirror.
|
204 | a8083063 | Iustin Pop |
|
205 | a8083063 | Iustin Pop | Returns:
|
206 | 0834c866 | Iustin Pop | (sync_percent, estimated_time, is_degraded, ldisk)
|
207 | 0834c866 | Iustin Pop |
|
208 | 0834c866 | Iustin Pop | If sync_percent is None, it means the device is not syncing.
|
209 | a8083063 | Iustin Pop |
|
210 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't estimate
|
211 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
|
212 | 0834c866 | Iustin Pop |
|
213 | a8083063 | Iustin Pop | If is_degraded is True, it means the device is missing
|
214 | a8083063 | Iustin Pop | redundancy. This is usually a sign that something went wrong in
|
215 | a8083063 | Iustin Pop | the device setup, if sync_percent is None.
|
216 | a8083063 | Iustin Pop |
|
217 | 0834c866 | Iustin Pop | The ldisk parameter represents the degradation of the local
|
218 | 0834c866 | Iustin Pop | data. This is only valid for some devices, the rest will always
|
219 | 0834c866 | Iustin Pop | return False (not degraded).
|
220 | 0834c866 | Iustin Pop |
|
221 | a8083063 | Iustin Pop | """
|
222 | 0834c866 | Iustin Pop | return None, None, False, False |
223 | a8083063 | Iustin Pop | |
224 | a8083063 | Iustin Pop | |
225 | a8083063 | Iustin Pop | def CombinedSyncStatus(self): |
226 | a8083063 | Iustin Pop | """Calculate the mirror status recursively for our children.
|
227 | a8083063 | Iustin Pop |
|
228 | a8083063 | Iustin Pop | The return value is the same as for `GetSyncStatus()` except the
|
229 | a8083063 | Iustin Pop | minimum percent and maximum time are calculated across our
|
230 | a8083063 | Iustin Pop | children.
|
231 | a8083063 | Iustin Pop |
|
232 | a8083063 | Iustin Pop | """
|
233 | 0834c866 | Iustin Pop | min_percent, max_time, is_degraded, ldisk = self.GetSyncStatus()
|
234 | a8083063 | Iustin Pop | if self._children: |
235 | a8083063 | Iustin Pop | for child in self._children: |
236 | 0834c866 | Iustin Pop | c_percent, c_time, c_degraded, c_ldisk = child.GetSyncStatus() |
237 | a8083063 | Iustin Pop | if min_percent is None: |
238 | a8083063 | Iustin Pop | min_percent = c_percent |
239 | a8083063 | Iustin Pop | elif c_percent is not None: |
240 | a8083063 | Iustin Pop | min_percent = min(min_percent, c_percent)
|
241 | a8083063 | Iustin Pop | if max_time is None: |
242 | a8083063 | Iustin Pop | max_time = c_time |
243 | a8083063 | Iustin Pop | elif c_time is not None: |
244 | a8083063 | Iustin Pop | max_time = max(max_time, c_time)
|
245 | a8083063 | Iustin Pop | is_degraded = is_degraded or c_degraded
|
246 | 0834c866 | Iustin Pop | ldisk = ldisk or c_ldisk
|
247 | 0834c866 | Iustin Pop | return min_percent, max_time, is_degraded, ldisk
|
248 | a8083063 | Iustin Pop | |
249 | a8083063 | Iustin Pop | |
250 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
251 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
252 | a0c3fea1 | Michael Hanselmann |
|
253 | a0c3fea1 | Michael Hanselmann | Only supported for some device types.
|
254 | a0c3fea1 | Michael Hanselmann |
|
255 | a0c3fea1 | Michael Hanselmann | """
|
256 | a0c3fea1 | Michael Hanselmann | for child in self._children: |
257 | a0c3fea1 | Michael Hanselmann | child.SetInfo(text) |
258 | a0c3fea1 | Michael Hanselmann | |
259 | 1005d816 | Iustin Pop | def Grow(self, amount): |
260 | 1005d816 | Iustin Pop | """Grow the block device.
|
261 | 1005d816 | Iustin Pop |
|
262 | 1005d816 | Iustin Pop | Arguments:
|
263 | 1005d816 | Iustin Pop | amount: the amount (in mebibytes) to grow with
|
264 | 1005d816 | Iustin Pop |
|
265 | 1005d816 | Iustin Pop | Returns: None
|
266 | 1005d816 | Iustin Pop |
|
267 | 1005d816 | Iustin Pop | """
|
268 | 1005d816 | Iustin Pop | raise NotImplementedError |
269 | a0c3fea1 | Michael Hanselmann | |
270 | a8083063 | Iustin Pop | def __repr__(self): |
271 | a8083063 | Iustin Pop | return ("<%s: unique_id: %s, children: %s, %s:%s, %s>" % |
272 | a8083063 | Iustin Pop | (self.__class__, self.unique_id, self._children, |
273 | a8083063 | Iustin Pop | self.major, self.minor, self.dev_path)) |
274 | a8083063 | Iustin Pop | |
275 | a8083063 | Iustin Pop | |
276 | a8083063 | Iustin Pop | class LogicalVolume(BlockDev): |
277 | a8083063 | Iustin Pop | """Logical Volume block device.
|
278 | a8083063 | Iustin Pop |
|
279 | a8083063 | Iustin Pop | """
|
280 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
281 | a8083063 | Iustin Pop | """Attaches to a LV device.
|
282 | a8083063 | Iustin Pop |
|
283 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
|
284 | a8083063 | Iustin Pop |
|
285 | a8083063 | Iustin Pop | """
|
286 | a8083063 | Iustin Pop | super(LogicalVolume, self).__init__(unique_id, children) |
287 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
288 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
289 | a8083063 | Iustin Pop | self._vg_name, self._lv_name = unique_id |
290 | a8083063 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
291 | 99e8295c | Iustin Pop | self._degraded = True |
292 | 99e8295c | Iustin Pop | self.major = self.minor = None |
293 | a8083063 | Iustin Pop | self.Attach()
|
294 | a8083063 | Iustin Pop | |
295 | a8083063 | Iustin Pop | @classmethod
|
296 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
297 | a8083063 | Iustin Pop | """Create a new logical volume.
|
298 | a8083063 | Iustin Pop |
|
299 | a8083063 | Iustin Pop | """
|
300 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
301 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
302 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
303 | a8083063 | Iustin Pop | pvs_info = cls.GetPVInfo(vg_name) |
304 | a8083063 | Iustin Pop | if not pvs_info: |
305 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't compute PV info for vg %s" % |
306 | 3ecf6786 | Iustin Pop | vg_name) |
307 | a8083063 | Iustin Pop | pvs_info.sort() |
308 | a8083063 | Iustin Pop | pvs_info.reverse() |
309 | 5b7b5d49 | Guido Trotter | |
310 | 5b7b5d49 | Guido Trotter | pvlist = [ pv[1] for pv in pvs_info ] |
311 | 5b7b5d49 | Guido Trotter | free_size = sum([ pv[0] for pv in pvs_info ]) |
312 | 5b7b5d49 | Guido Trotter | |
313 | 5b7b5d49 | Guido Trotter | # The size constraint should have been checked from the master before
|
314 | 5b7b5d49 | Guido Trotter | # calling the create function.
|
315 | a8083063 | Iustin Pop | if free_size < size:
|
316 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Not enough free space: required %s," |
317 | 3ecf6786 | Iustin Pop | " available %s" % (size, free_size))
|
318 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-n%s" % lv_name, |
319 | 5b7b5d49 | Guido Trotter | vg_name] + pvlist) |
320 | a8083063 | Iustin Pop | if result.failed:
|
321 | 6c896e2f | Iustin Pop | raise errors.BlockDeviceError("%s - %s" % (result.fail_reason, |
322 | 6c896e2f | Iustin Pop | result.output)) |
323 | a8083063 | Iustin Pop | return LogicalVolume(unique_id, children)
|
324 | a8083063 | Iustin Pop | |
325 | a8083063 | Iustin Pop | @staticmethod
|
326 | a8083063 | Iustin Pop | def GetPVInfo(vg_name): |
327 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
|
328 | a8083063 | Iustin Pop |
|
329 | a8083063 | Iustin Pop | Args:
|
330 | a8083063 | Iustin Pop | vg_name: the volume group name
|
331 | a8083063 | Iustin Pop |
|
332 | a8083063 | Iustin Pop | Returns:
|
333 | a8083063 | Iustin Pop | list of (free_space, name) with free_space in mebibytes
|
334 | 098c0958 | Michael Hanselmann |
|
335 | a8083063 | Iustin Pop | """
|
336 | a8083063 | Iustin Pop | command = ["pvs", "--noheadings", "--nosuffix", "--units=m", |
337 | a8083063 | Iustin Pop | "-opv_name,vg_name,pv_free,pv_attr", "--unbuffered", |
338 | a8083063 | Iustin Pop | "--separator=:"]
|
339 | a8083063 | Iustin Pop | result = utils.RunCmd(command) |
340 | a8083063 | Iustin Pop | if result.failed:
|
341 | 468c5f77 | Iustin Pop | logging.error("Can't get the PV information: %s - %s",
|
342 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
343 | a8083063 | Iustin Pop | return None |
344 | a8083063 | Iustin Pop | data = [] |
345 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
346 | a8083063 | Iustin Pop | fields = line.strip().split(':')
|
347 | a8083063 | Iustin Pop | if len(fields) != 4: |
348 | 468c5f77 | Iustin Pop | logging.error("Can't parse pvs output: line '%s'", line)
|
349 | a8083063 | Iustin Pop | return None |
350 | a8083063 | Iustin Pop | # skip over pvs from another vg or ones which are not allocatable
|
351 | a8083063 | Iustin Pop | if fields[1] != vg_name or fields[3][0] != 'a': |
352 | a8083063 | Iustin Pop | continue
|
353 | a8083063 | Iustin Pop | data.append((float(fields[2]), fields[0])) |
354 | a8083063 | Iustin Pop | |
355 | a8083063 | Iustin Pop | return data
|
356 | a8083063 | Iustin Pop | |
357 | a8083063 | Iustin Pop | def Remove(self): |
358 | a8083063 | Iustin Pop | """Remove this logical volume.
|
359 | a8083063 | Iustin Pop |
|
360 | a8083063 | Iustin Pop | """
|
361 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
362 | a8083063 | Iustin Pop | # the LV does not exist
|
363 | a8083063 | Iustin Pop | return True |
364 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
365 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
366 | a8083063 | Iustin Pop | if result.failed:
|
367 | 468c5f77 | Iustin Pop | logging.error("Can't lvremove: %s - %s",
|
368 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
369 | a8083063 | Iustin Pop | |
370 | a8083063 | Iustin Pop | return not result.failed |
371 | a8083063 | Iustin Pop | |
372 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
373 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
374 | f3e513ad | Iustin Pop |
|
375 | f3e513ad | Iustin Pop | """
|
376 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
377 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
378 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
379 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
380 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
381 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
382 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
383 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
384 | f3e513ad | Iustin Pop | if result.failed:
|
385 | f3e513ad | Iustin Pop | raise errors.BlockDeviceError("Failed to rename the logical volume: %s" % |
386 | f3e513ad | Iustin Pop | result.output) |
387 | be345db0 | Iustin Pop | self._lv_name = new_name
|
388 | be345db0 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
389 | be345db0 | Iustin Pop | |
390 | a8083063 | Iustin Pop | def Attach(self): |
391 | a8083063 | Iustin Pop | """Attach to an existing LV.
|
392 | a8083063 | Iustin Pop |
|
393 | a8083063 | Iustin Pop | This method will try to see if an existing and active LV exists
|
394 | c99a3cc0 | Manuel Franceschini | which matches our name. If so, its major/minor will be
|
395 | a8083063 | Iustin Pop | recorded.
|
396 | a8083063 | Iustin Pop |
|
397 | a8083063 | Iustin Pop | """
|
398 | cb999543 | Iustin Pop | self.attached = False |
399 | 99e8295c | Iustin Pop | result = utils.RunCmd(["lvs", "--noheadings", "--separator=,", |
400 | 99e8295c | Iustin Pop | "-olv_attr,lv_kernel_major,lv_kernel_minor",
|
401 | 99e8295c | Iustin Pop | self.dev_path])
|
402 | a8083063 | Iustin Pop | if result.failed:
|
403 | 468c5f77 | Iustin Pop | logging.error("Can't find LV %s: %s, %s",
|
404 | 468c5f77 | Iustin Pop | self.dev_path, result.fail_reason, result.output)
|
405 | a8083063 | Iustin Pop | return False |
406 | 99e8295c | Iustin Pop | out = result.stdout.strip().rstrip(',')
|
407 | 99e8295c | Iustin Pop | out = out.split(",")
|
408 | 99e8295c | Iustin Pop | if len(out) != 3: |
409 | 468c5f77 | Iustin Pop | logging.error("Can't parse LVS output, len(%s) != 3", str(out)) |
410 | 99e8295c | Iustin Pop | return False |
411 | 99e8295c | Iustin Pop | |
412 | 99e8295c | Iustin Pop | status, major, minor = out[:3]
|
413 | 99e8295c | Iustin Pop | if len(status) != 6: |
414 | 468c5f77 | Iustin Pop | logging.error("lvs lv_attr is not 6 characters (%s)", status)
|
415 | 99e8295c | Iustin Pop | return False |
416 | 99e8295c | Iustin Pop | |
417 | 99e8295c | Iustin Pop | try:
|
418 | 99e8295c | Iustin Pop | major = int(major)
|
419 | 99e8295c | Iustin Pop | minor = int(minor)
|
420 | 99e8295c | Iustin Pop | except ValueError, err: |
421 | 468c5f77 | Iustin Pop | logging.error("lvs major/minor cannot be parsed: %s", str(err)) |
422 | 99e8295c | Iustin Pop | |
423 | 99e8295c | Iustin Pop | self.major = major
|
424 | 99e8295c | Iustin Pop | self.minor = minor
|
425 | 99e8295c | Iustin Pop | self._degraded = status[0] == 'v' # virtual volume, i.e. doesn't backing |
426 | 99e8295c | Iustin Pop | # storage
|
427 | cb999543 | Iustin Pop | self.attached = True |
428 | 99e8295c | Iustin Pop | return True |
429 | a8083063 | Iustin Pop | |
430 | a8083063 | Iustin Pop | def Assemble(self): |
431 | a8083063 | Iustin Pop | """Assemble the device.
|
432 | a8083063 | Iustin Pop |
|
433 | 5574047a | Iustin Pop | We alway run `lvchange -ay` on the LV to ensure it's active before
|
434 | 5574047a | Iustin Pop | use, as there were cases when xenvg was not active after boot
|
435 | 5574047a | Iustin Pop | (also possibly after disk issues).
|
436 | a8083063 | Iustin Pop |
|
437 | a8083063 | Iustin Pop | """
|
438 | 5574047a | Iustin Pop | result = utils.RunCmd(["lvchange", "-ay", self.dev_path]) |
439 | 5574047a | Iustin Pop | if result.failed:
|
440 | 468c5f77 | Iustin Pop | logging.error("Can't activate lv %s: %s", self.dev_path, result.output) |
441 | cb999543 | Iustin Pop | return False |
442 | cb999543 | Iustin Pop | return self.Attach() |
443 | a8083063 | Iustin Pop | |
444 | a8083063 | Iustin Pop | def Shutdown(self): |
445 | a8083063 | Iustin Pop | """Shutdown the device.
|
446 | a8083063 | Iustin Pop |
|
447 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
448 | a8083063 | Iustin Pop | volumes on shutdown.
|
449 | a8083063 | Iustin Pop |
|
450 | a8083063 | Iustin Pop | """
|
451 | a8083063 | Iustin Pop | return True |
452 | a8083063 | Iustin Pop | |
453 | 9db6dbce | Iustin Pop | def GetSyncStatus(self): |
454 | 9db6dbce | Iustin Pop | """Returns the sync status of the device.
|
455 | 9db6dbce | Iustin Pop |
|
456 | 9db6dbce | Iustin Pop | If this device is a mirroring device, this function returns the
|
457 | 9db6dbce | Iustin Pop | status of the mirror.
|
458 | 9db6dbce | Iustin Pop |
|
459 | 9db6dbce | Iustin Pop | Returns:
|
460 | 0834c866 | Iustin Pop | (sync_percent, estimated_time, is_degraded, ldisk)
|
461 | 9db6dbce | Iustin Pop |
|
462 | 9db6dbce | Iustin Pop | For logical volumes, sync_percent and estimated_time are always
|
463 | 9db6dbce | Iustin Pop | None (no recovery in progress, as we don't handle the mirrored LV
|
464 | 0834c866 | Iustin Pop | case). The is_degraded parameter is the inverse of the ldisk
|
465 | 0834c866 | Iustin Pop | parameter.
|
466 | 9db6dbce | Iustin Pop |
|
467 | 0834c866 | Iustin Pop | For the ldisk parameter, we check if the logical volume has the
|
468 | 0834c866 | Iustin Pop | 'virtual' type, which means it's not backed by existing storage
|
469 | 0834c866 | Iustin Pop | anymore (read from it return I/O error). This happens after a
|
470 | 0834c866 | Iustin Pop | physical disk failure and subsequent 'vgreduce --removemissing' on
|
471 | 0834c866 | Iustin Pop | the volume group.
|
472 | 9db6dbce | Iustin Pop |
|
473 | 99e8295c | Iustin Pop | The status was already read in Attach, so we just return it.
|
474 | 99e8295c | Iustin Pop |
|
475 | 9db6dbce | Iustin Pop | """
|
476 | 99e8295c | Iustin Pop | return None, None, self._degraded, self._degraded |
477 | 9db6dbce | Iustin Pop | |
478 | a8083063 | Iustin Pop | def Open(self, force=False): |
479 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
480 | a8083063 | Iustin Pop |
|
481 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
482 | a8083063 | Iustin Pop |
|
483 | a8083063 | Iustin Pop | """
|
484 | fdbd668d | Iustin Pop | pass
|
485 | a8083063 | Iustin Pop | |
486 | a8083063 | Iustin Pop | def Close(self): |
487 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
488 | a8083063 | Iustin Pop |
|
489 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
490 | a8083063 | Iustin Pop |
|
491 | a8083063 | Iustin Pop | """
|
492 | fdbd668d | Iustin Pop | pass
|
493 | a8083063 | Iustin Pop | |
494 | a8083063 | Iustin Pop | def Snapshot(self, size): |
495 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
496 | a8083063 | Iustin Pop |
|
497 | a8083063 | Iustin Pop | """
|
498 | a8083063 | Iustin Pop | snap_name = self._lv_name + ".snap" |
499 | a8083063 | Iustin Pop | |
500 | a8083063 | Iustin Pop | # remove existing snapshot if found
|
501 | a8083063 | Iustin Pop | snap = LogicalVolume((self._vg_name, snap_name), None) |
502 | a8083063 | Iustin Pop | snap.Remove() |
503 | a8083063 | Iustin Pop | |
504 | a8083063 | Iustin Pop | pvs_info = self.GetPVInfo(self._vg_name) |
505 | a8083063 | Iustin Pop | if not pvs_info: |
506 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't compute PV info for vg %s" % |
507 | 3ecf6786 | Iustin Pop | self._vg_name)
|
508 | a8083063 | Iustin Pop | pvs_info.sort() |
509 | a8083063 | Iustin Pop | pvs_info.reverse() |
510 | a8083063 | Iustin Pop | free_size, pv_name = pvs_info[0]
|
511 | a8083063 | Iustin Pop | if free_size < size:
|
512 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Not enough free space: required %s," |
513 | 3ecf6786 | Iustin Pop | " available %s" % (size, free_size))
|
514 | a8083063 | Iustin Pop | |
515 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
516 | a8083063 | Iustin Pop | "-n%s" % snap_name, self.dev_path]) |
517 | a8083063 | Iustin Pop | if result.failed:
|
518 | 6c896e2f | Iustin Pop | raise errors.BlockDeviceError("command: %s error: %s - %s" % |
519 | 6c896e2f | Iustin Pop | (result.cmd, result.fail_reason, |
520 | 6c896e2f | Iustin Pop | result.output)) |
521 | a8083063 | Iustin Pop | |
522 | a8083063 | Iustin Pop | return snap_name
|
523 | a8083063 | Iustin Pop | |
524 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
525 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
526 | a0c3fea1 | Michael Hanselmann |
|
527 | a0c3fea1 | Michael Hanselmann | """
|
528 | a0c3fea1 | Michael Hanselmann | BlockDev.SetInfo(self, text)
|
529 | a0c3fea1 | Michael Hanselmann | |
530 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
531 | a0c3fea1 | Michael Hanselmann | text = re.sub('^[^A-Za-z0-9_+.]', '_', text) |
532 | a0c3fea1 | Michael Hanselmann | text = re.sub('[^-A-Za-z0-9_+.]', '_', text) |
533 | a0c3fea1 | Michael Hanselmann | |
534 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
535 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
536 | a0c3fea1 | Michael Hanselmann | |
537 | a0c3fea1 | Michael Hanselmann | result = utils.RunCmd(["lvchange", "--addtag", text, |
538 | a0c3fea1 | Michael Hanselmann | self.dev_path])
|
539 | a0c3fea1 | Michael Hanselmann | if result.failed:
|
540 | 6c896e2f | Iustin Pop | raise errors.BlockDeviceError("Command: %s error: %s - %s" % |
541 | 6c896e2f | Iustin Pop | (result.cmd, result.fail_reason, |
542 | 6c896e2f | Iustin Pop | result.output)) |
543 | 1005d816 | Iustin Pop | def Grow(self, amount): |
544 | 1005d816 | Iustin Pop | """Grow the logical volume.
|
545 | 1005d816 | Iustin Pop |
|
546 | 1005d816 | Iustin Pop | """
|
547 | 1005d816 | Iustin Pop | # we try multiple algorithms since the 'best' ones might not have
|
548 | 1005d816 | Iustin Pop | # space available in the right place, but later ones might (since
|
549 | 1005d816 | Iustin Pop | # they have less constraints); also note that only recent LVM
|
550 | 1005d816 | Iustin Pop | # supports 'cling'
|
551 | 1005d816 | Iustin Pop | for alloc_policy in "contiguous", "cling", "normal": |
552 | 1005d816 | Iustin Pop | result = utils.RunCmd(["lvextend", "--alloc", alloc_policy, |
553 | 1005d816 | Iustin Pop | "-L", "+%dm" % amount, self.dev_path]) |
554 | 1005d816 | Iustin Pop | if not result.failed: |
555 | 1005d816 | Iustin Pop | return
|
556 | 1005d816 | Iustin Pop | raise errors.BlockDeviceError("Can't grow LV %s: %s" % |
557 | 1005d816 | Iustin Pop | (self.dev_path, result.output))
|
558 | a0c3fea1 | Michael Hanselmann | |
559 | a0c3fea1 | Michael Hanselmann | |
560 | 6b90c22e | Iustin Pop | class DRBD8Status(object): |
561 | 6b90c22e | Iustin Pop | """A DRBD status representation class.
|
562 | 6b90c22e | Iustin Pop |
|
563 | 6b90c22e | Iustin Pop | Note that this doesn't support unconfigured devices (cs:Unconfigured).
|
564 | 6b90c22e | Iustin Pop |
|
565 | 6b90c22e | Iustin Pop | """
|
566 | 6b90c22e | Iustin Pop | LINE_RE = re.compile(r"\s*[0-9]+:\s*cs:(\S+)\s+st:([^/]+)/(\S+)"
|
567 | 6b90c22e | Iustin Pop | "\s+ds:([^/]+)/(\S+)\s+.*$")
|
568 | 6b90c22e | Iustin Pop | SYNC_RE = re.compile(r"^.*\ssync'ed:\s*([0-9.]+)%.*"
|
569 | 6b90c22e | Iustin Pop | "\sfinish: ([0-9]+):([0-9]+):([0-9]+)\s.*$")
|
570 | 6b90c22e | Iustin Pop | |
571 | 6b90c22e | Iustin Pop | def __init__(self, procline): |
572 | 6b90c22e | Iustin Pop | m = self.LINE_RE.match(procline)
|
573 | 6b90c22e | Iustin Pop | if not m: |
574 | 6b90c22e | Iustin Pop | raise errors.BlockDeviceError("Can't parse input data '%s'" % procline) |
575 | 6b90c22e | Iustin Pop | self.cstatus = m.group(1) |
576 | 6b90c22e | Iustin Pop | self.lrole = m.group(2) |
577 | 6b90c22e | Iustin Pop | self.rrole = m.group(3) |
578 | 6b90c22e | Iustin Pop | self.ldisk = m.group(4) |
579 | 6b90c22e | Iustin Pop | self.rdisk = m.group(5) |
580 | 6b90c22e | Iustin Pop | |
581 | 6b90c22e | Iustin Pop | self.is_standalone = self.cstatus == "StandAlone" |
582 | 6b90c22e | Iustin Pop | self.is_wfconn = self.cstatus == "WFConnection" |
583 | 6b90c22e | Iustin Pop | self.is_connected = self.cstatus == "Connected" |
584 | 6b90c22e | Iustin Pop | self.is_primary = self.lrole == "Primary" |
585 | 6b90c22e | Iustin Pop | self.is_secondary = self.lrole == "Secondary" |
586 | 6b90c22e | Iustin Pop | self.peer_primary = self.rrole == "Primary" |
587 | 6b90c22e | Iustin Pop | self.peer_secondary = self.rrole == "Secondary" |
588 | 6b90c22e | Iustin Pop | self.both_primary = self.is_primary and self.peer_primary |
589 | 6b90c22e | Iustin Pop | self.both_secondary = self.is_secondary and self.peer_secondary |
590 | 6b90c22e | Iustin Pop | |
591 | 6b90c22e | Iustin Pop | self.is_diskless = self.ldisk == "Diskless" |
592 | 6b90c22e | Iustin Pop | self.is_disk_uptodate = self.ldisk == "UpToDate" |
593 | 6b90c22e | Iustin Pop | |
594 | 6b90c22e | Iustin Pop | m = self.SYNC_RE.match(procline)
|
595 | 6b90c22e | Iustin Pop | if m:
|
596 | 6b90c22e | Iustin Pop | self.sync_percent = float(m.group(1)) |
597 | 6b90c22e | Iustin Pop | hours = int(m.group(2)) |
598 | 6b90c22e | Iustin Pop | minutes = int(m.group(3)) |
599 | 6b90c22e | Iustin Pop | seconds = int(m.group(4)) |
600 | 6b90c22e | Iustin Pop | self.est_time = hours * 3600 + minutes * 60 + seconds |
601 | 6b90c22e | Iustin Pop | else:
|
602 | 6b90c22e | Iustin Pop | self.sync_percent = None |
603 | 6b90c22e | Iustin Pop | self.est_time = None |
604 | 6b90c22e | Iustin Pop | |
605 | 6b90c22e | Iustin Pop | self.is_sync_target = self.peer_sync_source = self.cstatus == "SyncTarget" |
606 | 6b90c22e | Iustin Pop | self.peer_sync_target = self.is_sync_source = self.cstatus == "SyncSource" |
607 | 6b90c22e | Iustin Pop | self.is_resync = self.is_sync_target or self.is_sync_source |
608 | 6b90c22e | Iustin Pop | |
609 | 6b90c22e | Iustin Pop | |
610 | 0f7f32d9 | Iustin Pop | class BaseDRBD(BlockDev): |
611 | 0f7f32d9 | Iustin Pop | """Base DRBD class.
|
612 | a8083063 | Iustin Pop |
|
613 | 0f7f32d9 | Iustin Pop | This class contains a few bits of common functionality between the
|
614 | 0f7f32d9 | Iustin Pop | 0.7 and 8.x versions of DRBD.
|
615 | 0f7f32d9 | Iustin Pop |
|
616 | abdf0113 | Iustin Pop | """
|
617 | abdf0113 | Iustin Pop | _VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)"
|
618 | abdf0113 | Iustin Pop | r" \(api:(\d+)/proto:(\d+)(?:-(\d+))?\)")
|
619 | a8083063 | Iustin Pop | |
620 | abdf0113 | Iustin Pop | _DRBD_MAJOR = 147
|
621 | abdf0113 | Iustin Pop | _ST_UNCONFIGURED = "Unconfigured"
|
622 | abdf0113 | Iustin Pop | _ST_WFCONNECTION = "WFConnection"
|
623 | abdf0113 | Iustin Pop | _ST_CONNECTED = "Connected"
|
624 | a8083063 | Iustin Pop | |
625 | 6b90c22e | Iustin Pop | _STATUS_FILE = "/proc/drbd"
|
626 | 6b90c22e | Iustin Pop | |
627 | abdf0113 | Iustin Pop | @staticmethod
|
628 | 6b90c22e | Iustin Pop | def _GetProcData(filename=_STATUS_FILE): |
629 | abdf0113 | Iustin Pop | """Return data from /proc/drbd.
|
630 | a8083063 | Iustin Pop |
|
631 | a8083063 | Iustin Pop | """
|
632 | 6b90c22e | Iustin Pop | stat = open(filename, "r") |
633 | abdf0113 | Iustin Pop | try:
|
634 | abdf0113 | Iustin Pop | data = stat.read().splitlines() |
635 | abdf0113 | Iustin Pop | finally:
|
636 | abdf0113 | Iustin Pop | stat.close() |
637 | abdf0113 | Iustin Pop | if not data: |
638 | 6b90c22e | Iustin Pop | raise errors.BlockDeviceError("Can't read any data from %s" % filename) |
639 | abdf0113 | Iustin Pop | return data
|
640 | a8083063 | Iustin Pop | |
641 | abdf0113 | Iustin Pop | @staticmethod
|
642 | abdf0113 | Iustin Pop | def _MassageProcData(data): |
643 | abdf0113 | Iustin Pop | """Transform the output of _GetProdData into a nicer form.
|
644 | a8083063 | Iustin Pop |
|
645 | abdf0113 | Iustin Pop | Returns:
|
646 | abdf0113 | Iustin Pop | a dictionary of minor: joined lines from /proc/drbd for that minor
|
647 | a8083063 | Iustin Pop |
|
648 | a8083063 | Iustin Pop | """
|
649 | abdf0113 | Iustin Pop | lmatch = re.compile("^ *([0-9]+):.*$")
|
650 | abdf0113 | Iustin Pop | results = {} |
651 | abdf0113 | Iustin Pop | old_minor = old_line = None
|
652 | abdf0113 | Iustin Pop | for line in data: |
653 | abdf0113 | Iustin Pop | lresult = lmatch.match(line) |
654 | abdf0113 | Iustin Pop | if lresult is not None: |
655 | abdf0113 | Iustin Pop | if old_minor is not None: |
656 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
657 | abdf0113 | Iustin Pop | old_minor = int(lresult.group(1)) |
658 | abdf0113 | Iustin Pop | old_line = line |
659 | abdf0113 | Iustin Pop | else:
|
660 | abdf0113 | Iustin Pop | if old_minor is not None: |
661 | abdf0113 | Iustin Pop | old_line += " " + line.strip()
|
662 | abdf0113 | Iustin Pop | # add last line
|
663 | abdf0113 | Iustin Pop | if old_minor is not None: |
664 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
665 | abdf0113 | Iustin Pop | return results
|
666 | a8083063 | Iustin Pop | |
667 | abdf0113 | Iustin Pop | @classmethod
|
668 | abdf0113 | Iustin Pop | def _GetVersion(cls): |
669 | abdf0113 | Iustin Pop | """Return the DRBD version.
|
670 | a8083063 | Iustin Pop |
|
671 | abdf0113 | Iustin Pop | This will return a dict with keys:
|
672 | abdf0113 | Iustin Pop | k_major,
|
673 | abdf0113 | Iustin Pop | k_minor,
|
674 | abdf0113 | Iustin Pop | k_point,
|
675 | abdf0113 | Iustin Pop | api,
|
676 | abdf0113 | Iustin Pop | proto,
|
677 | abdf0113 | Iustin Pop | proto2 (only on drbd > 8.2.X)
|
678 | a8083063 | Iustin Pop |
|
679 | a8083063 | Iustin Pop | """
|
680 | abdf0113 | Iustin Pop | proc_data = cls._GetProcData() |
681 | abdf0113 | Iustin Pop | first_line = proc_data[0].strip()
|
682 | abdf0113 | Iustin Pop | version = cls._VERSION_RE.match(first_line) |
683 | abdf0113 | Iustin Pop | if not version: |
684 | abdf0113 | Iustin Pop | raise errors.BlockDeviceError("Can't parse DRBD version from '%s'" % |
685 | abdf0113 | Iustin Pop | first_line) |
686 | a8083063 | Iustin Pop | |
687 | abdf0113 | Iustin Pop | values = version.groups() |
688 | abdf0113 | Iustin Pop | retval = {'k_major': int(values[0]), |
689 | abdf0113 | Iustin Pop | 'k_minor': int(values[1]), |
690 | abdf0113 | Iustin Pop | 'k_point': int(values[2]), |
691 | abdf0113 | Iustin Pop | 'api': int(values[3]), |
692 | abdf0113 | Iustin Pop | 'proto': int(values[4]), |
693 | abdf0113 | Iustin Pop | } |
694 | abdf0113 | Iustin Pop | if values[5] is not None: |
695 | abdf0113 | Iustin Pop | retval['proto2'] = values[5] |
696 | a8083063 | Iustin Pop | |
697 | abdf0113 | Iustin Pop | return retval
|
698 | abdf0113 | Iustin Pop | |
699 | abdf0113 | Iustin Pop | @staticmethod
|
700 | abdf0113 | Iustin Pop | def _DevPath(minor): |
701 | abdf0113 | Iustin Pop | """Return the path to a drbd device for a given minor.
|
702 | a8083063 | Iustin Pop |
|
703 | a8083063 | Iustin Pop | """
|
704 | abdf0113 | Iustin Pop | return "/dev/drbd%d" % minor |
705 | a8083063 | Iustin Pop | |
706 | abdf0113 | Iustin Pop | @classmethod
|
707 | abdf0113 | Iustin Pop | def _GetUsedDevs(cls): |
708 | abdf0113 | Iustin Pop | """Compute the list of used DRBD devices.
|
709 | a8083063 | Iustin Pop |
|
710 | a8083063 | Iustin Pop | """
|
711 | abdf0113 | Iustin Pop | data = cls._GetProcData() |
712 | a8083063 | Iustin Pop | |
713 | abdf0113 | Iustin Pop | used_devs = {} |
714 | abdf0113 | Iustin Pop | valid_line = re.compile("^ *([0-9]+): cs:([^ ]+).*$")
|
715 | abdf0113 | Iustin Pop | for line in data: |
716 | abdf0113 | Iustin Pop | match = valid_line.match(line) |
717 | abdf0113 | Iustin Pop | if not match: |
718 | abdf0113 | Iustin Pop | continue
|
719 | abdf0113 | Iustin Pop | minor = int(match.group(1)) |
720 | abdf0113 | Iustin Pop | state = match.group(2)
|
721 | abdf0113 | Iustin Pop | if state == cls._ST_UNCONFIGURED:
|
722 | abdf0113 | Iustin Pop | continue
|
723 | abdf0113 | Iustin Pop | used_devs[minor] = state, line |
724 | a8083063 | Iustin Pop | |
725 | abdf0113 | Iustin Pop | return used_devs
|
726 | a8083063 | Iustin Pop | |
727 | abdf0113 | Iustin Pop | def _SetFromMinor(self, minor): |
728 | abdf0113 | Iustin Pop | """Set our parameters based on the given minor.
|
729 | 0834c866 | Iustin Pop |
|
730 | abdf0113 | Iustin Pop | This sets our minor variable and our dev_path.
|
731 | a8083063 | Iustin Pop |
|
732 | a8083063 | Iustin Pop | """
|
733 | abdf0113 | Iustin Pop | if minor is None: |
734 | abdf0113 | Iustin Pop | self.minor = self.dev_path = None |
735 | cb999543 | Iustin Pop | self.attached = False |
736 | a8083063 | Iustin Pop | else:
|
737 | abdf0113 | Iustin Pop | self.minor = minor
|
738 | abdf0113 | Iustin Pop | self.dev_path = self._DevPath(minor) |
739 | cb999543 | Iustin Pop | self.attached = True |
740 | a8083063 | Iustin Pop | |
741 | a8083063 | Iustin Pop | @staticmethod
|
742 | abdf0113 | Iustin Pop | def _CheckMetaSize(meta_device): |
743 | abdf0113 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
744 | a8083063 | Iustin Pop |
|
745 | abdf0113 | Iustin Pop | This currently only check the size, which must be around
|
746 | abdf0113 | Iustin Pop | 128MiB.
|
747 | a8083063 | Iustin Pop |
|
748 | a8083063 | Iustin Pop | """
|
749 | abdf0113 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize", meta_device]) |
750 | abdf0113 | Iustin Pop | if result.failed:
|
751 | 468c5f77 | Iustin Pop | logging.error("Failed to get device size: %s - %s",
|
752 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
753 | abdf0113 | Iustin Pop | return False |
754 | a8083063 | Iustin Pop | try:
|
755 | abdf0113 | Iustin Pop | sectors = int(result.stdout)
|
756 | abdf0113 | Iustin Pop | except ValueError: |
757 | 468c5f77 | Iustin Pop | logging.error("Invalid output from blockdev: '%s'", result.stdout)
|
758 | abdf0113 | Iustin Pop | return False |
759 | abdf0113 | Iustin Pop | bytes = sectors * 512
|
760 | abdf0113 | Iustin Pop | if bytes < 128 * 1024 * 1024: # less than 128MiB |
761 | 468c5f77 | Iustin Pop | logging.error("Meta device too small (%.2fMib)", (bytes / 1024 / 1024)) |
762 | abdf0113 | Iustin Pop | return False |
763 | abdf0113 | Iustin Pop | if bytes > (128 + 32) * 1024 * 1024: # account for an extra (big) PE on LVM |
764 | 468c5f77 | Iustin Pop | logging.error("Meta device too big (%.2fMiB)", (bytes / 1024 / 1024)) |
765 | abdf0113 | Iustin Pop | return False |
766 | abdf0113 | Iustin Pop | return True |
767 | a8083063 | Iustin Pop | |
768 | abdf0113 | Iustin Pop | def Rename(self, new_id): |
769 | abdf0113 | Iustin Pop | """Rename a device.
|
770 | a8083063 | Iustin Pop |
|
771 | abdf0113 | Iustin Pop | This is not supported for drbd devices.
|
772 | a8083063 | Iustin Pop |
|
773 | a8083063 | Iustin Pop | """
|
774 | abdf0113 | Iustin Pop | raise errors.ProgrammerError("Can't rename a drbd device") |
775 | a8083063 | Iustin Pop | |
776 | f3e513ad | Iustin Pop | |
777 | a2cfdea2 | Iustin Pop | class DRBD8(BaseDRBD): |
778 | a2cfdea2 | Iustin Pop | """DRBD v8.x block device.
|
779 | a2cfdea2 | Iustin Pop |
|
780 | a2cfdea2 | Iustin Pop | This implements the local host part of the DRBD device, i.e. it
|
781 | a2cfdea2 | Iustin Pop | doesn't do anything to the supposed peer. If you need a fully
|
782 | a2cfdea2 | Iustin Pop | connected DRBD pair, you need to use this class on both hosts.
|
783 | a2cfdea2 | Iustin Pop |
|
784 | a2cfdea2 | Iustin Pop | The unique_id for the drbd device is the (local_ip, local_port,
|
785 | a2cfdea2 | Iustin Pop | remote_ip, remote_port) tuple, and it must have two children: the
|
786 | a2cfdea2 | Iustin Pop | data device and the meta_device. The meta device is checked for
|
787 | a2cfdea2 | Iustin Pop | valid size and is zeroed on create.
|
788 | a2cfdea2 | Iustin Pop |
|
789 | a2cfdea2 | Iustin Pop | """
|
790 | a2cfdea2 | Iustin Pop | _MAX_MINORS = 255
|
791 | a2cfdea2 | Iustin Pop | _PARSE_SHOW = None
|
792 | a2cfdea2 | Iustin Pop | |
793 | a2cfdea2 | Iustin Pop | def __init__(self, unique_id, children): |
794 | fc1dc9d7 | Iustin Pop | if children and children.count(None) > 0: |
795 | fc1dc9d7 | Iustin Pop | children = [] |
796 | a2cfdea2 | Iustin Pop | super(DRBD8, self).__init__(unique_id, children) |
797 | a2cfdea2 | Iustin Pop | self.major = self._DRBD_MAJOR |
798 | c3f9340c | Guido Trotter | version = self._GetVersion()
|
799 | c3f9340c | Guido Trotter | if version['k_major'] != 8 : |
800 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Mismatch in DRBD kernel version and" |
801 | a2cfdea2 | Iustin Pop | " requested ganeti usage: kernel is"
|
802 | c3f9340c | Guido Trotter | " %s.%s, ganeti wants 8.x" %
|
803 | c3f9340c | Guido Trotter | (version['k_major'], version['k_minor'])) |
804 | a2cfdea2 | Iustin Pop | |
805 | b00b95dd | Iustin Pop | if len(children) not in (0, 2): |
806 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(children)) |
807 | a2cfdea2 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 4: |
808 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
809 | a2cfdea2 | Iustin Pop | self._lhost, self._lport, self._rhost, self._rport = unique_id |
810 | a2cfdea2 | Iustin Pop | self.Attach()
|
811 | a2cfdea2 | Iustin Pop | |
812 | a2cfdea2 | Iustin Pop | @classmethod
|
813 | a2cfdea2 | Iustin Pop | def _InitMeta(cls, minor, dev_path): |
814 | a2cfdea2 | Iustin Pop | """Initialize a meta device.
|
815 | a2cfdea2 | Iustin Pop |
|
816 | a2cfdea2 | Iustin Pop | This will not work if the given minor is in use.
|
817 | a2cfdea2 | Iustin Pop |
|
818 | a2cfdea2 | Iustin Pop | """
|
819 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", "--force", cls._DevPath(minor), |
820 | a2cfdea2 | Iustin Pop | "v08", dev_path, "0", "create-md"]) |
821 | a2cfdea2 | Iustin Pop | if result.failed:
|
822 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't initialize meta device: %s" % |
823 | a2cfdea2 | Iustin Pop | result.output) |
824 | a2cfdea2 | Iustin Pop | |
825 | a2cfdea2 | Iustin Pop | @classmethod
|
826 | a2cfdea2 | Iustin Pop | def _FindUnusedMinor(cls): |
827 | a2cfdea2 | Iustin Pop | """Find an unused DRBD device.
|
828 | a2cfdea2 | Iustin Pop |
|
829 | a2cfdea2 | Iustin Pop | This is specific to 8.x as the minors are allocated dynamically,
|
830 | a2cfdea2 | Iustin Pop | so non-existing numbers up to a max minor count are actually free.
|
831 | a2cfdea2 | Iustin Pop |
|
832 | a2cfdea2 | Iustin Pop | """
|
833 | a2cfdea2 | Iustin Pop | data = cls._GetProcData() |
834 | a2cfdea2 | Iustin Pop | |
835 | a2cfdea2 | Iustin Pop | unused_line = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
836 | a2cfdea2 | Iustin Pop | used_line = re.compile("^ *([0-9]+): cs:")
|
837 | a2cfdea2 | Iustin Pop | highest = None
|
838 | a2cfdea2 | Iustin Pop | for line in data: |
839 | a2cfdea2 | Iustin Pop | match = unused_line.match(line) |
840 | a2cfdea2 | Iustin Pop | if match:
|
841 | a2cfdea2 | Iustin Pop | return int(match.group(1)) |
842 | a2cfdea2 | Iustin Pop | match = used_line.match(line) |
843 | a2cfdea2 | Iustin Pop | if match:
|
844 | a2cfdea2 | Iustin Pop | minor = int(match.group(1)) |
845 | a2cfdea2 | Iustin Pop | highest = max(highest, minor)
|
846 | a2cfdea2 | Iustin Pop | if highest is None: # there are no minors in use at all |
847 | a2cfdea2 | Iustin Pop | return 0 |
848 | a2cfdea2 | Iustin Pop | if highest >= cls._MAX_MINORS:
|
849 | 468c5f77 | Iustin Pop | logging.error("Error: no free drbd minors!")
|
850 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
851 | a2cfdea2 | Iustin Pop | return highest + 1 |
852 | a2cfdea2 | Iustin Pop | |
853 | a2cfdea2 | Iustin Pop | @classmethod
|
854 | a2cfdea2 | Iustin Pop | def _IsValidMeta(cls, meta_device): |
855 | a2cfdea2 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
856 | a2cfdea2 | Iustin Pop |
|
857 | a2cfdea2 | Iustin Pop | """
|
858 | a2cfdea2 | Iustin Pop | minor = cls._FindUnusedMinor() |
859 | a2cfdea2 | Iustin Pop | minor_path = cls._DevPath(minor) |
860 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", minor_path,
|
861 | a2cfdea2 | Iustin Pop | "v08", meta_device, "0", |
862 | a2cfdea2 | Iustin Pop | "dstate"])
|
863 | a2cfdea2 | Iustin Pop | if result.failed:
|
864 | 468c5f77 | Iustin Pop | logging.error("Invalid meta device %s: %s", meta_device, result.output)
|
865 | a2cfdea2 | Iustin Pop | return False |
866 | a2cfdea2 | Iustin Pop | return True |
867 | a2cfdea2 | Iustin Pop | |
868 | a2cfdea2 | Iustin Pop | @classmethod
|
869 | a2cfdea2 | Iustin Pop | def _GetShowParser(cls): |
870 | a2cfdea2 | Iustin Pop | """Return a parser for `drbd show` output.
|
871 | a2cfdea2 | Iustin Pop |
|
872 | a2cfdea2 | Iustin Pop | This will either create or return an already-create parser for the
|
873 | a2cfdea2 | Iustin Pop | output of the command `drbd show`.
|
874 | a2cfdea2 | Iustin Pop |
|
875 | a2cfdea2 | Iustin Pop | """
|
876 | a2cfdea2 | Iustin Pop | if cls._PARSE_SHOW is not None: |
877 | a2cfdea2 | Iustin Pop | return cls._PARSE_SHOW
|
878 | a2cfdea2 | Iustin Pop | |
879 | a2cfdea2 | Iustin Pop | # pyparsing setup
|
880 | a2cfdea2 | Iustin Pop | lbrace = pyp.Literal("{").suppress()
|
881 | a2cfdea2 | Iustin Pop | rbrace = pyp.Literal("}").suppress()
|
882 | a2cfdea2 | Iustin Pop | semi = pyp.Literal(";").suppress()
|
883 | a2cfdea2 | Iustin Pop | # this also converts the value to an int
|
884 | c522ea02 | Iustin Pop | number = pyp.Word(pyp.nums).setParseAction(lambda s, l, t: int(t[0])) |
885 | a2cfdea2 | Iustin Pop | |
886 | a2cfdea2 | Iustin Pop | comment = pyp.Literal ("#") + pyp.Optional(pyp.restOfLine)
|
887 | a2cfdea2 | Iustin Pop | defa = pyp.Literal("_is_default").suppress()
|
888 | a2cfdea2 | Iustin Pop | dbl_quote = pyp.Literal('"').suppress()
|
889 | a2cfdea2 | Iustin Pop | |
890 | a2cfdea2 | Iustin Pop | keyword = pyp.Word(pyp.alphanums + '-')
|
891 | a2cfdea2 | Iustin Pop | |
892 | a2cfdea2 | Iustin Pop | # value types
|
893 | a2cfdea2 | Iustin Pop | value = pyp.Word(pyp.alphanums + '_-/.:')
|
894 | a2cfdea2 | Iustin Pop | quoted = dbl_quote + pyp.CharsNotIn('"') + dbl_quote
|
895 | a2cfdea2 | Iustin Pop | addr_port = (pyp.Word(pyp.nums + '.') + pyp.Literal(':').suppress() + |
896 | a2cfdea2 | Iustin Pop | number) |
897 | a2cfdea2 | Iustin Pop | # meta device, extended syntax
|
898 | a2cfdea2 | Iustin Pop | meta_value = ((value ^ quoted) + pyp.Literal('[').suppress() +
|
899 | a2cfdea2 | Iustin Pop | number + pyp.Word(']').suppress())
|
900 | a2cfdea2 | Iustin Pop | |
901 | a2cfdea2 | Iustin Pop | # a statement
|
902 | a2cfdea2 | Iustin Pop | stmt = (~rbrace + keyword + ~lbrace + |
903 | 63012024 | Guido Trotter | pyp.Optional(addr_port ^ value ^ quoted ^ meta_value) + |
904 | a2cfdea2 | Iustin Pop | pyp.Optional(defa) + semi + |
905 | a2cfdea2 | Iustin Pop | pyp.Optional(pyp.restOfLine).suppress()) |
906 | a2cfdea2 | Iustin Pop | |
907 | a2cfdea2 | Iustin Pop | # an entire section
|
908 | a2cfdea2 | Iustin Pop | section_name = pyp.Word(pyp.alphas + '_')
|
909 | a2cfdea2 | Iustin Pop | section = section_name + lbrace + pyp.ZeroOrMore(pyp.Group(stmt)) + rbrace |
910 | a2cfdea2 | Iustin Pop | |
911 | a2cfdea2 | Iustin Pop | bnf = pyp.ZeroOrMore(pyp.Group(section ^ stmt)) |
912 | a2cfdea2 | Iustin Pop | bnf.ignore(comment) |
913 | a2cfdea2 | Iustin Pop | |
914 | a2cfdea2 | Iustin Pop | cls._PARSE_SHOW = bnf |
915 | a2cfdea2 | Iustin Pop | |
916 | a2cfdea2 | Iustin Pop | return bnf
|
917 | a2cfdea2 | Iustin Pop | |
918 | a2cfdea2 | Iustin Pop | @classmethod
|
919 | 3840729d | Iustin Pop | def _GetShowData(cls, minor): |
920 | 3840729d | Iustin Pop | """Return the `drbdsetup show` data for a minor.
|
921 | a2cfdea2 | Iustin Pop |
|
922 | a2cfdea2 | Iustin Pop | """
|
923 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
924 | a2cfdea2 | Iustin Pop | if result.failed:
|
925 | 468c5f77 | Iustin Pop | logging.error("Can't display the drbd config: %s - %s",
|
926 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
927 | 3840729d | Iustin Pop | return None |
928 | 3840729d | Iustin Pop | return result.stdout
|
929 | 3840729d | Iustin Pop | |
930 | 3840729d | Iustin Pop | @classmethod
|
931 | 3840729d | Iustin Pop | def _GetDevInfo(cls, out): |
932 | 3840729d | Iustin Pop | """Parse details about a given DRBD minor.
|
933 | 3840729d | Iustin Pop |
|
934 | 3840729d | Iustin Pop | This return, if available, the local backing device (as a path)
|
935 | 3840729d | Iustin Pop | and the local and remote (ip, port) information from a string
|
936 | 3840729d | Iustin Pop | containing the output of the `drbdsetup show` command as returned
|
937 | 3840729d | Iustin Pop | by _GetShowData.
|
938 | 3840729d | Iustin Pop |
|
939 | 3840729d | Iustin Pop | """
|
940 | 3840729d | Iustin Pop | data = {} |
941 | a2cfdea2 | Iustin Pop | if not out: |
942 | a2cfdea2 | Iustin Pop | return data
|
943 | a2cfdea2 | Iustin Pop | |
944 | a2cfdea2 | Iustin Pop | bnf = cls._GetShowParser() |
945 | a2cfdea2 | Iustin Pop | # run pyparse
|
946 | a2cfdea2 | Iustin Pop | |
947 | a2cfdea2 | Iustin Pop | try:
|
948 | a2cfdea2 | Iustin Pop | results = bnf.parseString(out) |
949 | a2cfdea2 | Iustin Pop | except pyp.ParseException, err:
|
950 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't parse drbdsetup show output: %s" % |
951 | a2cfdea2 | Iustin Pop | str(err))
|
952 | a2cfdea2 | Iustin Pop | |
953 | a2cfdea2 | Iustin Pop | # and massage the results into our desired format
|
954 | a2cfdea2 | Iustin Pop | for section in results: |
955 | a2cfdea2 | Iustin Pop | sname = section[0]
|
956 | a2cfdea2 | Iustin Pop | if sname == "_this_host": |
957 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
958 | a2cfdea2 | Iustin Pop | if lst[0] == "disk": |
959 | a2cfdea2 | Iustin Pop | data["local_dev"] = lst[1] |
960 | a2cfdea2 | Iustin Pop | elif lst[0] == "meta-disk": |
961 | a2cfdea2 | Iustin Pop | data["meta_dev"] = lst[1] |
962 | a2cfdea2 | Iustin Pop | data["meta_index"] = lst[2] |
963 | a2cfdea2 | Iustin Pop | elif lst[0] == "address": |
964 | a2cfdea2 | Iustin Pop | data["local_addr"] = tuple(lst[1:]) |
965 | a2cfdea2 | Iustin Pop | elif sname == "_remote_host": |
966 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
967 | a2cfdea2 | Iustin Pop | if lst[0] == "address": |
968 | a2cfdea2 | Iustin Pop | data["remote_addr"] = tuple(lst[1:]) |
969 | a2cfdea2 | Iustin Pop | return data
|
970 | a2cfdea2 | Iustin Pop | |
971 | a2cfdea2 | Iustin Pop | def _MatchesLocal(self, info): |
972 | a2cfdea2 | Iustin Pop | """Test if our local config matches with an existing device.
|
973 | a2cfdea2 | Iustin Pop |
|
974 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
975 | a2cfdea2 | Iustin Pop | method tests if our local backing device is the same as the one in
|
976 | a2cfdea2 | Iustin Pop | the info parameter, in effect testing if we look like the given
|
977 | a2cfdea2 | Iustin Pop | device.
|
978 | a2cfdea2 | Iustin Pop |
|
979 | a2cfdea2 | Iustin Pop | """
|
980 | b00b95dd | Iustin Pop | if self._children: |
981 | b00b95dd | Iustin Pop | backend, meta = self._children
|
982 | b00b95dd | Iustin Pop | else:
|
983 | b00b95dd | Iustin Pop | backend = meta = None
|
984 | b00b95dd | Iustin Pop | |
985 | a2cfdea2 | Iustin Pop | if backend is not None: |
986 | b00b95dd | Iustin Pop | retval = ("local_dev" in info and info["local_dev"] == backend.dev_path) |
987 | a2cfdea2 | Iustin Pop | else:
|
988 | a2cfdea2 | Iustin Pop | retval = ("local_dev" not in info) |
989 | b00b95dd | Iustin Pop | |
990 | a2cfdea2 | Iustin Pop | if meta is not None: |
991 | b00b95dd | Iustin Pop | retval = retval and ("meta_dev" in info and |
992 | b00b95dd | Iustin Pop | info["meta_dev"] == meta.dev_path)
|
993 | b00b95dd | Iustin Pop | retval = retval and ("meta_index" in info and |
994 | b00b95dd | Iustin Pop | info["meta_index"] == 0) |
995 | a2cfdea2 | Iustin Pop | else:
|
996 | a2cfdea2 | Iustin Pop | retval = retval and ("meta_dev" not in info and |
997 | a2cfdea2 | Iustin Pop | "meta_index" not in info) |
998 | a2cfdea2 | Iustin Pop | return retval
|
999 | a2cfdea2 | Iustin Pop | |
1000 | a2cfdea2 | Iustin Pop | def _MatchesNet(self, info): |
1001 | a2cfdea2 | Iustin Pop | """Test if our network config matches with an existing device.
|
1002 | a2cfdea2 | Iustin Pop |
|
1003 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1004 | a2cfdea2 | Iustin Pop | method tests if our network configuration is the same as the one
|
1005 | a2cfdea2 | Iustin Pop | in the info parameter, in effect testing if we look like the given
|
1006 | a2cfdea2 | Iustin Pop | device.
|
1007 | a2cfdea2 | Iustin Pop |
|
1008 | a2cfdea2 | Iustin Pop | """
|
1009 | a2cfdea2 | Iustin Pop | if (((self._lhost is None and not ("local_addr" in info)) and |
1010 | a2cfdea2 | Iustin Pop | (self._rhost is None and not ("remote_addr" in info)))): |
1011 | a2cfdea2 | Iustin Pop | return True |
1012 | a2cfdea2 | Iustin Pop | |
1013 | a2cfdea2 | Iustin Pop | if self._lhost is None: |
1014 | a2cfdea2 | Iustin Pop | return False |
1015 | a2cfdea2 | Iustin Pop | |
1016 | a2cfdea2 | Iustin Pop | if not ("local_addr" in info and |
1017 | a2cfdea2 | Iustin Pop | "remote_addr" in info): |
1018 | a2cfdea2 | Iustin Pop | return False |
1019 | a2cfdea2 | Iustin Pop | |
1020 | a2cfdea2 | Iustin Pop | retval = (info["local_addr"] == (self._lhost, self._lport)) |
1021 | a2cfdea2 | Iustin Pop | retval = (retval and
|
1022 | a2cfdea2 | Iustin Pop | info["remote_addr"] == (self._rhost, self._rport)) |
1023 | a2cfdea2 | Iustin Pop | return retval
|
1024 | a2cfdea2 | Iustin Pop | |
1025 | a2cfdea2 | Iustin Pop | @classmethod
|
1026 | a2cfdea2 | Iustin Pop | def _AssembleLocal(cls, minor, backend, meta): |
1027 | a2cfdea2 | Iustin Pop | """Configure the local part of a DRBD device.
|
1028 | a2cfdea2 | Iustin Pop |
|
1029 | a2cfdea2 | Iustin Pop | This is the first thing that must be done on an unconfigured DRBD
|
1030 | a2cfdea2 | Iustin Pop | device. And it must be done only once.
|
1031 | a2cfdea2 | Iustin Pop |
|
1032 | a2cfdea2 | Iustin Pop | """
|
1033 | a2cfdea2 | Iustin Pop | if not cls._IsValidMeta(meta): |
1034 | a2cfdea2 | Iustin Pop | return False |
1035 | 333411a7 | Guido Trotter | args = ["drbdsetup", cls._DevPath(minor), "disk", |
1036 | 333411a7 | Guido Trotter | backend, meta, "0", "-e", "detach", "--create-device"] |
1037 | 333411a7 | Guido Trotter | result = utils.RunCmd(args) |
1038 | a2cfdea2 | Iustin Pop | if result.failed:
|
1039 | 468c5f77 | Iustin Pop | logging.error("Can't attach local disk: %s", result.output)
|
1040 | a2cfdea2 | Iustin Pop | return not result.failed |
1041 | a2cfdea2 | Iustin Pop | |
1042 | a2cfdea2 | Iustin Pop | @classmethod
|
1043 | a2cfdea2 | Iustin Pop | def _AssembleNet(cls, minor, net_info, protocol, |
1044 | a2cfdea2 | Iustin Pop | dual_pri=False, hmac=None, secret=None): |
1045 | a2cfdea2 | Iustin Pop | """Configure the network part of the device.
|
1046 | a2cfdea2 | Iustin Pop |
|
1047 | a2cfdea2 | Iustin Pop | """
|
1048 | a2cfdea2 | Iustin Pop | lhost, lport, rhost, rport = net_info |
1049 | 52857176 | Iustin Pop | if None in net_info: |
1050 | 52857176 | Iustin Pop | # we don't want network connection and actually want to make
|
1051 | 52857176 | Iustin Pop | # sure its shutdown
|
1052 | 52857176 | Iustin Pop | return cls._ShutdownNet(minor)
|
1053 | 52857176 | Iustin Pop | |
1054 | a2cfdea2 | Iustin Pop | args = ["drbdsetup", cls._DevPath(minor), "net", |
1055 | f38478b2 | Iustin Pop | "%s:%s" % (lhost, lport), "%s:%s" % (rhost, rport), protocol, |
1056 | f38478b2 | Iustin Pop | "-A", "discard-zero-changes", |
1057 | f38478b2 | Iustin Pop | "-B", "consensus", |
1058 | ab6cc81c | Iustin Pop | "--create-device",
|
1059 | f38478b2 | Iustin Pop | ] |
1060 | a2cfdea2 | Iustin Pop | if dual_pri:
|
1061 | a2cfdea2 | Iustin Pop | args.append("-m")
|
1062 | a2cfdea2 | Iustin Pop | if hmac and secret: |
1063 | a2cfdea2 | Iustin Pop | args.extend(["-a", hmac, "-x", secret]) |
1064 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(args) |
1065 | a2cfdea2 | Iustin Pop | if result.failed:
|
1066 | 468c5f77 | Iustin Pop | logging.error("Can't setup network for dbrd device: %s - %s",
|
1067 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
1068 | a2cfdea2 | Iustin Pop | return False |
1069 | a2cfdea2 | Iustin Pop | |
1070 | a2cfdea2 | Iustin Pop | timeout = time.time() + 10
|
1071 | a2cfdea2 | Iustin Pop | ok = False
|
1072 | a2cfdea2 | Iustin Pop | while time.time() < timeout:
|
1073 | 3840729d | Iustin Pop | info = cls._GetDevInfo(cls._GetShowData(minor)) |
1074 | a2cfdea2 | Iustin Pop | if not "local_addr" in info or not "remote_addr" in info: |
1075 | a2cfdea2 | Iustin Pop | time.sleep(1)
|
1076 | a2cfdea2 | Iustin Pop | continue
|
1077 | a2cfdea2 | Iustin Pop | if (info["local_addr"] != (lhost, lport) or |
1078 | a2cfdea2 | Iustin Pop | info["remote_addr"] != (rhost, rport)):
|
1079 | a2cfdea2 | Iustin Pop | time.sleep(1)
|
1080 | a2cfdea2 | Iustin Pop | continue
|
1081 | a2cfdea2 | Iustin Pop | ok = True
|
1082 | a2cfdea2 | Iustin Pop | break
|
1083 | a2cfdea2 | Iustin Pop | if not ok: |
1084 | 468c5f77 | Iustin Pop | logging.error("Timeout while configuring network")
|
1085 | a2cfdea2 | Iustin Pop | return False |
1086 | a2cfdea2 | Iustin Pop | return True |
1087 | a2cfdea2 | Iustin Pop | |
1088 | b00b95dd | Iustin Pop | def AddChildren(self, devices): |
1089 | b00b95dd | Iustin Pop | """Add a disk to the DRBD device.
|
1090 | b00b95dd | Iustin Pop |
|
1091 | b00b95dd | Iustin Pop | """
|
1092 | b00b95dd | Iustin Pop | if self.minor is None: |
1093 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to dbrd8 during AddChildren") |
1094 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1095 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Need two devices for AddChildren") |
1096 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1097 | 03ece5f3 | Iustin Pop | if "local_dev" in info: |
1098 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("DRBD8 already attached to a local disk") |
1099 | b00b95dd | Iustin Pop | backend, meta = devices |
1100 | b00b95dd | Iustin Pop | if backend.dev_path is None or meta.dev_path is None: |
1101 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Children not ready during AddChildren") |
1102 | b00b95dd | Iustin Pop | backend.Open() |
1103 | b00b95dd | Iustin Pop | meta.Open() |
1104 | b00b95dd | Iustin Pop | if not self._CheckMetaSize(meta.dev_path): |
1105 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device size") |
1106 | b00b95dd | Iustin Pop | self._InitMeta(self._FindUnusedMinor(), meta.dev_path) |
1107 | b00b95dd | Iustin Pop | if not self._IsValidMeta(meta.dev_path): |
1108 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Cannot initalize meta device") |
1109 | b00b95dd | Iustin Pop | |
1110 | b00b95dd | Iustin Pop | if not self._AssembleLocal(self.minor, backend.dev_path, meta.dev_path): |
1111 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to local storage") |
1112 | b00b95dd | Iustin Pop | self._children = devices
|
1113 | b00b95dd | Iustin Pop | |
1114 | b00b95dd | Iustin Pop | def RemoveChildren(self, devices): |
1115 | b00b95dd | Iustin Pop | """Detach the drbd device from local storage.
|
1116 | b00b95dd | Iustin Pop |
|
1117 | b00b95dd | Iustin Pop | """
|
1118 | b00b95dd | Iustin Pop | if self.minor is None: |
1119 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to drbd8 during" |
1120 | b00b95dd | Iustin Pop | " RemoveChildren")
|
1121 | 03ece5f3 | Iustin Pop | # early return if we don't actually have backing storage
|
1122 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1123 | 03ece5f3 | Iustin Pop | if "local_dev" not in info: |
1124 | 03ece5f3 | Iustin Pop | return
|
1125 | b00b95dd | Iustin Pop | if len(self._children) != 2: |
1126 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("We don't have two children: %s" % |
1127 | b00b95dd | Iustin Pop | self._children)
|
1128 | e739bd57 | Iustin Pop | if self._children.count(None) == 2: # we don't actually have children :) |
1129 | 468c5f77 | Iustin Pop | logging.error("Requested detach while detached")
|
1130 | e739bd57 | Iustin Pop | return
|
1131 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1132 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("We need two children in RemoveChildren") |
1133 | e739bd57 | Iustin Pop | for child, dev in zip(self._children, devices): |
1134 | e739bd57 | Iustin Pop | if dev != child.dev_path:
|
1135 | e739bd57 | Iustin Pop | raise errors.BlockDeviceError("Mismatch in local storage" |
1136 | e739bd57 | Iustin Pop | " (%s != %s) in RemoveChildren" %
|
1137 | e739bd57 | Iustin Pop | (dev, child.dev_path)) |
1138 | b00b95dd | Iustin Pop | |
1139 | b00b95dd | Iustin Pop | if not self._ShutdownLocal(self.minor): |
1140 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't detach from local storage") |
1141 | b00b95dd | Iustin Pop | self._children = []
|
1142 | b00b95dd | Iustin Pop | |
1143 | a2cfdea2 | Iustin Pop | def SetSyncSpeed(self, kbytes): |
1144 | a2cfdea2 | Iustin Pop | """Set the speed of the DRBD syncer.
|
1145 | a2cfdea2 | Iustin Pop |
|
1146 | a2cfdea2 | Iustin Pop | """
|
1147 | a2cfdea2 | Iustin Pop | children_result = super(DRBD8, self).SetSyncSpeed(kbytes) |
1148 | a2cfdea2 | Iustin Pop | if self.minor is None: |
1149 | 468c5f77 | Iustin Pop | logging.info("Instance not attached to a device")
|
1150 | a2cfdea2 | Iustin Pop | return False |
1151 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "syncer", "-r", "%d" % |
1152 | a2cfdea2 | Iustin Pop | kbytes]) |
1153 | a2cfdea2 | Iustin Pop | if result.failed:
|
1154 | 468c5f77 | Iustin Pop | logging.error("Can't change syncer rate: %s - %s",
|
1155 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
1156 | a2cfdea2 | Iustin Pop | return not result.failed and children_result |
1157 | a2cfdea2 | Iustin Pop | |
1158 | 6b90c22e | Iustin Pop | def GetProcStatus(self): |
1159 | 6b90c22e | Iustin Pop | """Return device data from /proc.
|
1160 | 6b90c22e | Iustin Pop |
|
1161 | 6b90c22e | Iustin Pop | """
|
1162 | 6b90c22e | Iustin Pop | if self.minor is None: |
1163 | 6b90c22e | Iustin Pop | raise errors.BlockDeviceError("GetStats() called while not attached") |
1164 | 6b90c22e | Iustin Pop | proc_info = self._MassageProcData(self._GetProcData()) |
1165 | 6b90c22e | Iustin Pop | if self.minor not in proc_info: |
1166 | 6b90c22e | Iustin Pop | raise errors.BlockDeviceError("Can't find myself in /proc (minor %d)" % |
1167 | 6b90c22e | Iustin Pop | self.minor)
|
1168 | 6b90c22e | Iustin Pop | return DRBD8Status(proc_info[self.minor]) |
1169 | 6b90c22e | Iustin Pop | |
1170 | a2cfdea2 | Iustin Pop | def GetSyncStatus(self): |
1171 | a2cfdea2 | Iustin Pop | """Returns the sync status of the device.
|
1172 | a2cfdea2 | Iustin Pop |
|
1173 | a2cfdea2 | Iustin Pop | Returns:
|
1174 | 583e3f6f | Iustin Pop | (sync_percent, estimated_time, is_degraded)
|
1175 | a2cfdea2 | Iustin Pop |
|
1176 | a2cfdea2 | Iustin Pop | If sync_percent is None, it means all is ok
|
1177 | a2cfdea2 | Iustin Pop | If estimated_time is None, it means we can't esimate
|
1178 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
|
1179 | 0834c866 | Iustin Pop |
|
1180 | 0834c866 | Iustin Pop |
|
1181 | 0834c866 | Iustin Pop | We set the is_degraded parameter to True on two conditions:
|
1182 | 0834c866 | Iustin Pop | network not connected or local disk missing.
|
1183 | 0834c866 | Iustin Pop |
|
1184 | 0834c866 | Iustin Pop | We compute the ldisk parameter based on wheter we have a local
|
1185 | 0834c866 | Iustin Pop | disk or not.
|
1186 | a2cfdea2 | Iustin Pop |
|
1187 | a2cfdea2 | Iustin Pop | """
|
1188 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1189 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device in GetSyncStatus") |
1190 | 6b90c22e | Iustin Pop | stats = self.GetProcStatus()
|
1191 | 6b90c22e | Iustin Pop | ldisk = not stats.is_disk_uptodate
|
1192 | 6b90c22e | Iustin Pop | is_degraded = not stats.is_connected
|
1193 | 6b90c22e | Iustin Pop | return stats.sync_percent, stats.est_time, is_degraded or ldisk, ldisk |
1194 | a2cfdea2 | Iustin Pop | |
1195 | a2cfdea2 | Iustin Pop | def Open(self, force=False): |
1196 | a2cfdea2 | Iustin Pop | """Make the local state primary.
|
1197 | a2cfdea2 | Iustin Pop |
|
1198 | f860ff4e | Guido Trotter | If the 'force' parameter is given, the '-o' option is passed to
|
1199 | f860ff4e | Guido Trotter | drbdsetup. Since this is a potentially dangerous operation, the
|
1200 | a2cfdea2 | Iustin Pop | force flag should be only given after creation, when it actually
|
1201 | f860ff4e | Guido Trotter | is mandatory.
|
1202 | a2cfdea2 | Iustin Pop |
|
1203 | a2cfdea2 | Iustin Pop | """
|
1204 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1205 | 468c5f77 | Iustin Pop | logging.error("DRBD cannot attach to a device during open")
|
1206 | a2cfdea2 | Iustin Pop | return False |
1207 | a2cfdea2 | Iustin Pop | cmd = ["drbdsetup", self.dev_path, "primary"] |
1208 | a2cfdea2 | Iustin Pop | if force:
|
1209 | a2cfdea2 | Iustin Pop | cmd.append("-o")
|
1210 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(cmd) |
1211 | a2cfdea2 | Iustin Pop | if result.failed:
|
1212 | fdbd668d | Iustin Pop | msg = ("Can't make drbd device primary: %s" % result.output)
|
1213 | 468c5f77 | Iustin Pop | logging.error(msg) |
1214 | fdbd668d | Iustin Pop | raise errors.BlockDeviceError(msg)
|
1215 | a2cfdea2 | Iustin Pop | |
1216 | a2cfdea2 | Iustin Pop | def Close(self): |
1217 | a2cfdea2 | Iustin Pop | """Make the local state secondary.
|
1218 | a2cfdea2 | Iustin Pop |
|
1219 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1220 | a2cfdea2 | Iustin Pop |
|
1221 | a2cfdea2 | Iustin Pop | """
|
1222 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1223 | 468c5f77 | Iustin Pop | logging.info("Instance not attached to a device")
|
1224 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find device") |
1225 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
1226 | a2cfdea2 | Iustin Pop | if result.failed:
|
1227 | fdbd668d | Iustin Pop | msg = ("Can't switch drbd device to"
|
1228 | fdbd668d | Iustin Pop | " secondary: %s" % result.output)
|
1229 | 468c5f77 | Iustin Pop | logging.error(msg) |
1230 | fdbd668d | Iustin Pop | raise errors.BlockDeviceError(msg)
|
1231 | a2cfdea2 | Iustin Pop | |
1232 | a2cfdea2 | Iustin Pop | def Attach(self): |
1233 | a2cfdea2 | Iustin Pop | """Find a DRBD device which matches our config and attach to it.
|
1234 | a2cfdea2 | Iustin Pop |
|
1235 | a2cfdea2 | Iustin Pop | In case of partially attached (local device matches but no network
|
1236 | a2cfdea2 | Iustin Pop | setup), we perform the network attach. If successful, we re-test
|
1237 | a2cfdea2 | Iustin Pop | the attach if can return success.
|
1238 | a2cfdea2 | Iustin Pop |
|
1239 | a2cfdea2 | Iustin Pop | """
|
1240 | a2cfdea2 | Iustin Pop | for minor in self._GetUsedDevs(): |
1241 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(minor)) |
1242 | a2cfdea2 | Iustin Pop | match_l = self._MatchesLocal(info)
|
1243 | a2cfdea2 | Iustin Pop | match_r = self._MatchesNet(info)
|
1244 | a2cfdea2 | Iustin Pop | if match_l and match_r: |
1245 | a2cfdea2 | Iustin Pop | break
|
1246 | a2cfdea2 | Iustin Pop | if match_l and not match_r and "local_addr" not in info: |
1247 | a2cfdea2 | Iustin Pop | res_r = self._AssembleNet(minor,
|
1248 | a2cfdea2 | Iustin Pop | (self._lhost, self._lport, |
1249 | a2cfdea2 | Iustin Pop | self._rhost, self._rport), |
1250 | a2cfdea2 | Iustin Pop | "C")
|
1251 | 3840729d | Iustin Pop | if res_r:
|
1252 | 3840729d | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1253 | 3840729d | Iustin Pop | break
|
1254 | fc1dc9d7 | Iustin Pop | # the weakest case: we find something that is only net attached
|
1255 | fc1dc9d7 | Iustin Pop | # even though we were passed some children at init time
|
1256 | fc1dc9d7 | Iustin Pop | if match_r and "local_dev" not in info: |
1257 | fc1dc9d7 | Iustin Pop | break
|
1258 | bf25af3b | Iustin Pop | |
1259 | bf25af3b | Iustin Pop | # this case must be considered only if we actually have local
|
1260 | bf25af3b | Iustin Pop | # storage, i.e. not in diskless mode, because all diskless
|
1261 | bf25af3b | Iustin Pop | # devices are equal from the point of view of local
|
1262 | bf25af3b | Iustin Pop | # configuration
|
1263 | bf25af3b | Iustin Pop | if (match_l and "local_dev" in info and |
1264 | bf25af3b | Iustin Pop | not match_r and "local_addr" in info): |
1265 | 9cdbe77f | Iustin Pop | # strange case - the device network part points to somewhere
|
1266 | 9cdbe77f | Iustin Pop | # else, even though its local storage is ours; as we own the
|
1267 | 9cdbe77f | Iustin Pop | # drbd space, we try to disconnect from the remote peer and
|
1268 | 9cdbe77f | Iustin Pop | # reconnect to our correct one
|
1269 | 9cdbe77f | Iustin Pop | if not self._ShutdownNet(minor): |
1270 | 9cdbe77f | Iustin Pop | raise errors.BlockDeviceError("Device has correct local storage," |
1271 | 9cdbe77f | Iustin Pop | " wrong remote peer and is unable to"
|
1272 | 9cdbe77f | Iustin Pop | " disconnect in order to attach to"
|
1273 | 9cdbe77f | Iustin Pop | " the correct peer")
|
1274 | 9cdbe77f | Iustin Pop | # note: _AssembleNet also handles the case when we don't want
|
1275 | 9cdbe77f | Iustin Pop | # local storage (i.e. one or more of the _[lr](host|port) is
|
1276 | 9cdbe77f | Iustin Pop | # None)
|
1277 | 9cdbe77f | Iustin Pop | if (self._AssembleNet(minor, (self._lhost, self._lport, |
1278 | 9cdbe77f | Iustin Pop | self._rhost, self._rport), "C") and |
1279 | 3840729d | Iustin Pop | self._MatchesNet(self._GetDevInfo(self._GetShowData(minor)))): |
1280 | 9cdbe77f | Iustin Pop | break
|
1281 | 9cdbe77f | Iustin Pop | |
1282 | a2cfdea2 | Iustin Pop | else:
|
1283 | a2cfdea2 | Iustin Pop | minor = None
|
1284 | a2cfdea2 | Iustin Pop | |
1285 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1286 | a2cfdea2 | Iustin Pop | return minor is not None |
1287 | a2cfdea2 | Iustin Pop | |
1288 | a2cfdea2 | Iustin Pop | def Assemble(self): |
1289 | a2cfdea2 | Iustin Pop | """Assemble the drbd.
|
1290 | a2cfdea2 | Iustin Pop |
|
1291 | a2cfdea2 | Iustin Pop | Method:
|
1292 | a2cfdea2 | Iustin Pop | - if we have a local backing device, we bind to it by:
|
1293 | a2cfdea2 | Iustin Pop | - checking the list of used drbd devices
|
1294 | a2cfdea2 | Iustin Pop | - check if the local minor use of any of them is our own device
|
1295 | a2cfdea2 | Iustin Pop | - if yes, abort?
|
1296 | a2cfdea2 | Iustin Pop | - if not, bind
|
1297 | a2cfdea2 | Iustin Pop | - if we have a local/remote net info:
|
1298 | a2cfdea2 | Iustin Pop | - redo the local backing device step for the remote device
|
1299 | a2cfdea2 | Iustin Pop | - check if any drbd device is using the local port,
|
1300 | a2cfdea2 | Iustin Pop | if yes abort
|
1301 | a2cfdea2 | Iustin Pop | - check if any remote drbd device is using the remote
|
1302 | a2cfdea2 | Iustin Pop | port, if yes abort (for now)
|
1303 | a2cfdea2 | Iustin Pop | - bind our net port
|
1304 | a2cfdea2 | Iustin Pop | - bind the remote net port
|
1305 | a2cfdea2 | Iustin Pop |
|
1306 | a2cfdea2 | Iustin Pop | """
|
1307 | a2cfdea2 | Iustin Pop | self.Attach()
|
1308 | a2cfdea2 | Iustin Pop | if self.minor is not None: |
1309 | 468c5f77 | Iustin Pop | logging.info("Already assembled")
|
1310 | a2cfdea2 | Iustin Pop | return True |
1311 | a2cfdea2 | Iustin Pop | |
1312 | a2cfdea2 | Iustin Pop | result = super(DRBD8, self).Assemble() |
1313 | a2cfdea2 | Iustin Pop | if not result: |
1314 | a2cfdea2 | Iustin Pop | return result
|
1315 | a2cfdea2 | Iustin Pop | |
1316 | a2cfdea2 | Iustin Pop | minor = self._FindUnusedMinor()
|
1317 | a2cfdea2 | Iustin Pop | need_localdev_teardown = False
|
1318 | fc1dc9d7 | Iustin Pop | if self._children and self._children[0] and self._children[1]: |
1319 | a2cfdea2 | Iustin Pop | result = self._AssembleLocal(minor, self._children[0].dev_path, |
1320 | a2cfdea2 | Iustin Pop | self._children[1].dev_path) |
1321 | a2cfdea2 | Iustin Pop | if not result: |
1322 | a2cfdea2 | Iustin Pop | return False |
1323 | a2cfdea2 | Iustin Pop | need_localdev_teardown = True
|
1324 | a2cfdea2 | Iustin Pop | if self._lhost and self._lport and self._rhost and self._rport: |
1325 | a2cfdea2 | Iustin Pop | result = self._AssembleNet(minor,
|
1326 | a2cfdea2 | Iustin Pop | (self._lhost, self._lport, |
1327 | a2cfdea2 | Iustin Pop | self._rhost, self._rport), |
1328 | a2cfdea2 | Iustin Pop | "C")
|
1329 | a2cfdea2 | Iustin Pop | if not result: |
1330 | a2cfdea2 | Iustin Pop | if need_localdev_teardown:
|
1331 | a2cfdea2 | Iustin Pop | # we will ignore failures from this
|
1332 | 468c5f77 | Iustin Pop | logging.error("net setup failed, tearing down local device")
|
1333 | a2cfdea2 | Iustin Pop | self._ShutdownAll(minor)
|
1334 | a2cfdea2 | Iustin Pop | return False |
1335 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1336 | a2cfdea2 | Iustin Pop | return True |
1337 | a2cfdea2 | Iustin Pop | |
1338 | a2cfdea2 | Iustin Pop | @classmethod
|
1339 | b00b95dd | Iustin Pop | def _ShutdownLocal(cls, minor): |
1340 | b00b95dd | Iustin Pop | """Detach from the local device.
|
1341 | b00b95dd | Iustin Pop |
|
1342 | b00b95dd | Iustin Pop | I/Os will continue to be served from the remote device. If we
|
1343 | b00b95dd | Iustin Pop | don't have a remote device, this operation will fail.
|
1344 | b00b95dd | Iustin Pop |
|
1345 | b00b95dd | Iustin Pop | """
|
1346 | b00b95dd | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
1347 | b00b95dd | Iustin Pop | if result.failed:
|
1348 | 468c5f77 | Iustin Pop | logging.error("Can't detach local device: %s", result.output)
|
1349 | b00b95dd | Iustin Pop | return not result.failed |
1350 | b00b95dd | Iustin Pop | |
1351 | b00b95dd | Iustin Pop | @classmethod
|
1352 | f3e513ad | Iustin Pop | def _ShutdownNet(cls, minor): |
1353 | f3e513ad | Iustin Pop | """Disconnect from the remote peer.
|
1354 | f3e513ad | Iustin Pop |
|
1355 | f3e513ad | Iustin Pop | This fails if we don't have a local device.
|
1356 | f3e513ad | Iustin Pop |
|
1357 | f3e513ad | Iustin Pop | """
|
1358 | f3e513ad | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
1359 | a8459f1c | Iustin Pop | if result.failed:
|
1360 | 468c5f77 | Iustin Pop | logging.error("Can't shutdown network: %s", result.output)
|
1361 | f3e513ad | Iustin Pop | return not result.failed |
1362 | f3e513ad | Iustin Pop | |
1363 | f3e513ad | Iustin Pop | @classmethod
|
1364 | a2cfdea2 | Iustin Pop | def _ShutdownAll(cls, minor): |
1365 | a2cfdea2 | Iustin Pop | """Deactivate the device.
|
1366 | a2cfdea2 | Iustin Pop |
|
1367 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1368 | a2cfdea2 | Iustin Pop |
|
1369 | a2cfdea2 | Iustin Pop | """
|
1370 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "down"]) |
1371 | a2cfdea2 | Iustin Pop | if result.failed:
|
1372 | 468c5f77 | Iustin Pop | logging.error("Can't shutdown drbd device: %s", result.output)
|
1373 | a2cfdea2 | Iustin Pop | return not result.failed |
1374 | a2cfdea2 | Iustin Pop | |
1375 | a2cfdea2 | Iustin Pop | def Shutdown(self): |
1376 | a2cfdea2 | Iustin Pop | """Shutdown the DRBD device.
|
1377 | a2cfdea2 | Iustin Pop |
|
1378 | a2cfdea2 | Iustin Pop | """
|
1379 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1380 | 468c5f77 | Iustin Pop | logging.info("DRBD device not attached to a device during Shutdown")
|
1381 | a2cfdea2 | Iustin Pop | return True |
1382 | a2cfdea2 | Iustin Pop | if not self._ShutdownAll(self.minor): |
1383 | a2cfdea2 | Iustin Pop | return False |
1384 | a2cfdea2 | Iustin Pop | self.minor = None |
1385 | a2cfdea2 | Iustin Pop | self.dev_path = None |
1386 | a2cfdea2 | Iustin Pop | return True |
1387 | a2cfdea2 | Iustin Pop | |
1388 | a2cfdea2 | Iustin Pop | def Remove(self): |
1389 | a2cfdea2 | Iustin Pop | """Stub remove for DRBD devices.
|
1390 | a2cfdea2 | Iustin Pop |
|
1391 | a2cfdea2 | Iustin Pop | """
|
1392 | a2cfdea2 | Iustin Pop | return self.Shutdown() |
1393 | a2cfdea2 | Iustin Pop | |
1394 | a2cfdea2 | Iustin Pop | @classmethod
|
1395 | a2cfdea2 | Iustin Pop | def Create(cls, unique_id, children, size): |
1396 | a2cfdea2 | Iustin Pop | """Create a new DRBD8 device.
|
1397 | a2cfdea2 | Iustin Pop |
|
1398 | a2cfdea2 | Iustin Pop | Since DRBD devices are not created per se, just assembled, this
|
1399 | a2cfdea2 | Iustin Pop | function only initializes the metadata.
|
1400 | a2cfdea2 | Iustin Pop |
|
1401 | a2cfdea2 | Iustin Pop | """
|
1402 | a2cfdea2 | Iustin Pop | if len(children) != 2: |
1403 | a2cfdea2 | Iustin Pop | raise errors.ProgrammerError("Invalid setup for the drbd device") |
1404 | a2cfdea2 | Iustin Pop | meta = children[1]
|
1405 | a2cfdea2 | Iustin Pop | meta.Assemble() |
1406 | a2cfdea2 | Iustin Pop | if not meta.Attach(): |
1407 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to meta device") |
1408 | a2cfdea2 | Iustin Pop | if not cls._CheckMetaSize(meta.dev_path): |
1409 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device size") |
1410 | a2cfdea2 | Iustin Pop | cls._InitMeta(cls._FindUnusedMinor(), meta.dev_path) |
1411 | a2cfdea2 | Iustin Pop | if not cls._IsValidMeta(meta.dev_path): |
1412 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Cannot initalize meta device") |
1413 | a2cfdea2 | Iustin Pop | return cls(unique_id, children)
|
1414 | a2cfdea2 | Iustin Pop | |
1415 | 1005d816 | Iustin Pop | def Grow(self, amount): |
1416 | 1005d816 | Iustin Pop | """Resize the DRBD device and its backing storage.
|
1417 | 1005d816 | Iustin Pop |
|
1418 | 1005d816 | Iustin Pop | """
|
1419 | 1005d816 | Iustin Pop | if self.minor is None: |
1420 | 1005d816 | Iustin Pop | raise errors.ProgrammerError("drbd8: Grow called while not attached") |
1421 | 1005d816 | Iustin Pop | if len(self._children) != 2 or None in self._children: |
1422 | 1005d816 | Iustin Pop | raise errors.BlockDeviceError("Cannot grow diskless DRBD8 device") |
1423 | 1005d816 | Iustin Pop | self._children[0].Grow(amount) |
1424 | 1005d816 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "resize"]) |
1425 | 1005d816 | Iustin Pop | if result.failed:
|
1426 | 1005d816 | Iustin Pop | raise errors.BlockDeviceError("resize failed for %s: %s" % |
1427 | 1005d816 | Iustin Pop | (self.dev_path, result.output))
|
1428 | 1005d816 | Iustin Pop | return
|
1429 | 1005d816 | Iustin Pop | |
1430 | a8083063 | Iustin Pop | |
1431 | 6f695a2e | Manuel Franceschini | class FileStorage(BlockDev): |
1432 | 6f695a2e | Manuel Franceschini | """File device.
|
1433 | abdf0113 | Iustin Pop |
|
1434 | 6f695a2e | Manuel Franceschini | This class represents the a file storage backend device.
|
1435 | 6f695a2e | Manuel Franceschini |
|
1436 | 6f695a2e | Manuel Franceschini | The unique_id for the file device is a (file_driver, file_path) tuple.
|
1437 | abdf0113 | Iustin Pop |
|
1438 | 6f695a2e | Manuel Franceschini | """
|
1439 | 6f695a2e | Manuel Franceschini | def __init__(self, unique_id, children): |
1440 | 6f695a2e | Manuel Franceschini | """Initalizes a file device backend.
|
1441 | 6f695a2e | Manuel Franceschini |
|
1442 | 6f695a2e | Manuel Franceschini | """
|
1443 | 6f695a2e | Manuel Franceschini | if children:
|
1444 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("Invalid setup for file device") |
1445 | 6f695a2e | Manuel Franceschini | super(FileStorage, self).__init__(unique_id, children) |
1446 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1447 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1448 | 6f695a2e | Manuel Franceschini | self.driver = unique_id[0] |
1449 | 6f695a2e | Manuel Franceschini | self.dev_path = unique_id[1] |
1450 | 6f695a2e | Manuel Franceschini | |
1451 | 6f695a2e | Manuel Franceschini | def Assemble(self): |
1452 | 6f695a2e | Manuel Franceschini | """Assemble the device.
|
1453 | 6f695a2e | Manuel Franceschini |
|
1454 | 6f695a2e | Manuel Franceschini | Checks whether the file device exists, raises BlockDeviceError otherwise.
|
1455 | 6f695a2e | Manuel Franceschini |
|
1456 | 6f695a2e | Manuel Franceschini | """
|
1457 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
1458 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("File device '%s' does not exist." % |
1459 | 6f695a2e | Manuel Franceschini | self.dev_path)
|
1460 | 6f695a2e | Manuel Franceschini | return True |
1461 | 6f695a2e | Manuel Franceschini | |
1462 | 6f695a2e | Manuel Franceschini | def Shutdown(self): |
1463 | 6f695a2e | Manuel Franceschini | """Shutdown the device.
|
1464 | 6f695a2e | Manuel Franceschini |
|
1465 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type, as we don't deacivate
|
1466 | 6f695a2e | Manuel Franceschini | the file on shutdown.
|
1467 | 6f695a2e | Manuel Franceschini |
|
1468 | 6f695a2e | Manuel Franceschini | """
|
1469 | 6f695a2e | Manuel Franceschini | return True |
1470 | 6f695a2e | Manuel Franceschini | |
1471 | 6f695a2e | Manuel Franceschini | def Open(self, force=False): |
1472 | 6f695a2e | Manuel Franceschini | """Make the device ready for I/O.
|
1473 | 6f695a2e | Manuel Franceschini |
|
1474 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
1475 | 6f695a2e | Manuel Franceschini |
|
1476 | 6f695a2e | Manuel Franceschini | """
|
1477 | 6f695a2e | Manuel Franceschini | pass
|
1478 | 6f695a2e | Manuel Franceschini | |
1479 | 6f695a2e | Manuel Franceschini | def Close(self): |
1480 | 6f695a2e | Manuel Franceschini | """Notifies that the device will no longer be used for I/O.
|
1481 | 6f695a2e | Manuel Franceschini |
|
1482 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
1483 | 6f695a2e | Manuel Franceschini |
|
1484 | 6f695a2e | Manuel Franceschini | """
|
1485 | 6f695a2e | Manuel Franceschini | pass
|
1486 | 6f695a2e | Manuel Franceschini | |
1487 | 6f695a2e | Manuel Franceschini | def Remove(self): |
1488 | 6f695a2e | Manuel Franceschini | """Remove the file backing the block device.
|
1489 | 6f695a2e | Manuel Franceschini |
|
1490 | 6f695a2e | Manuel Franceschini | Returns:
|
1491 | 6f695a2e | Manuel Franceschini | boolean indicating wheter removal of file was successful or not.
|
1492 | 6f695a2e | Manuel Franceschini |
|
1493 | 6f695a2e | Manuel Franceschini | """
|
1494 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
1495 | 6f695a2e | Manuel Franceschini | return True |
1496 | 6f695a2e | Manuel Franceschini | try:
|
1497 | 6f695a2e | Manuel Franceschini | os.remove(self.dev_path)
|
1498 | 6f695a2e | Manuel Franceschini | return True |
1499 | 6f695a2e | Manuel Franceschini | except OSError, err: |
1500 | 468c5f77 | Iustin Pop | logging.error("Can't remove file '%s': %s", self.dev_path, err) |
1501 | 6f695a2e | Manuel Franceschini | return False |
1502 | 6f695a2e | Manuel Franceschini | |
1503 | 6f695a2e | Manuel Franceschini | def Attach(self): |
1504 | 6f695a2e | Manuel Franceschini | """Attach to an existing file.
|
1505 | 6f695a2e | Manuel Franceschini |
|
1506 | 6f695a2e | Manuel Franceschini | Check if this file already exists.
|
1507 | 6f695a2e | Manuel Franceschini |
|
1508 | 6f695a2e | Manuel Franceschini | Returns:
|
1509 | 6f695a2e | Manuel Franceschini | boolean indicating if file exists or not.
|
1510 | 6f695a2e | Manuel Franceschini |
|
1511 | 6f695a2e | Manuel Franceschini | """
|
1512 | 6f695a2e | Manuel Franceschini | if os.path.exists(self.dev_path): |
1513 | 6f695a2e | Manuel Franceschini | return True |
1514 | 6f695a2e | Manuel Franceschini | return False |
1515 | 6f695a2e | Manuel Franceschini | |
1516 | 6f695a2e | Manuel Franceschini | @classmethod
|
1517 | 6f695a2e | Manuel Franceschini | def Create(cls, unique_id, children, size): |
1518 | 6f695a2e | Manuel Franceschini | """Create a new file.
|
1519 | 6f695a2e | Manuel Franceschini |
|
1520 | 6f695a2e | Manuel Franceschini | Args:
|
1521 | 6f695a2e | Manuel Franceschini | children:
|
1522 | 6f695a2e | Manuel Franceschini | size: integer size of file in MiB
|
1523 | 6f695a2e | Manuel Franceschini |
|
1524 | 6f695a2e | Manuel Franceschini | Returns:
|
1525 | 6f695a2e | Manuel Franceschini | A ganeti.bdev.FileStorage object.
|
1526 | 6f695a2e | Manuel Franceschini |
|
1527 | 6f695a2e | Manuel Franceschini | """
|
1528 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1529 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1530 | 6f695a2e | Manuel Franceschini | dev_path = unique_id[1]
|
1531 | 6f695a2e | Manuel Franceschini | try:
|
1532 | 6f695a2e | Manuel Franceschini | f = open(dev_path, 'w') |
1533 | 6f695a2e | Manuel Franceschini | except IOError, err: |
1534 | b62ddbe5 | Guido Trotter | raise errors.BlockDeviceError("Could not create '%'" % err) |
1535 | 6f695a2e | Manuel Franceschini | else:
|
1536 | 6f695a2e | Manuel Franceschini | f.truncate(size * 1024 * 1024) |
1537 | 6f695a2e | Manuel Franceschini | f.close() |
1538 | 6f695a2e | Manuel Franceschini | |
1539 | 6f695a2e | Manuel Franceschini | return FileStorage(unique_id, children)
|
1540 | 6f695a2e | Manuel Franceschini | |
1541 | 6f695a2e | Manuel Franceschini | |
1542 | a8083063 | Iustin Pop | DEV_MAP = { |
1543 | fe96220b | Iustin Pop | constants.LD_LV: LogicalVolume, |
1544 | a1f445d3 | Iustin Pop | constants.LD_DRBD8: DRBD8, |
1545 | 6f695a2e | Manuel Franceschini | constants.LD_FILE: FileStorage, |
1546 | a8083063 | Iustin Pop | } |
1547 | a8083063 | Iustin Pop | |
1548 | a8083063 | Iustin Pop | |
1549 | a8083063 | Iustin Pop | def FindDevice(dev_type, unique_id, children): |
1550 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
1551 | a8083063 | Iustin Pop |
|
1552 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
1553 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
1554 | a8083063 | Iustin Pop |
|
1555 | a8083063 | Iustin Pop | """
|
1556 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1557 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1558 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children) |
1559 | cb999543 | Iustin Pop | if not device.attached: |
1560 | a8083063 | Iustin Pop | return None |
1561 | a8083063 | Iustin Pop | return device
|
1562 | a8083063 | Iustin Pop | |
1563 | a8083063 | Iustin Pop | |
1564 | a8083063 | Iustin Pop | def AttachOrAssemble(dev_type, unique_id, children): |
1565 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
1566 | a8083063 | Iustin Pop |
|
1567 | a8083063 | Iustin Pop | This will attach to an existing assembled device or will assemble
|
1568 | a8083063 | Iustin Pop | the device, as needed, to bring it fully up.
|
1569 | a8083063 | Iustin Pop |
|
1570 | a8083063 | Iustin Pop | """
|
1571 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1572 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1573 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children) |
1574 | cb999543 | Iustin Pop | if not device.attached: |
1575 | a8083063 | Iustin Pop | device.Assemble() |
1576 | cb999543 | Iustin Pop | if not device.attached: |
1577 | be1ba2bd | Iustin Pop | raise errors.BlockDeviceError("Can't find a valid block device for" |
1578 | be1ba2bd | Iustin Pop | " %s/%s/%s" %
|
1579 | be1ba2bd | Iustin Pop | (dev_type, unique_id, children)) |
1580 | a8083063 | Iustin Pop | return device
|
1581 | a8083063 | Iustin Pop | |
1582 | a8083063 | Iustin Pop | |
1583 | a8083063 | Iustin Pop | def Create(dev_type, unique_id, children, size): |
1584 | a8083063 | Iustin Pop | """Create a device.
|
1585 | a8083063 | Iustin Pop |
|
1586 | a8083063 | Iustin Pop | """
|
1587 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1588 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1589 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type].Create(unique_id, children, size) |
1590 | a8083063 | Iustin Pop | return device |