42 |
42 |
_DEVICE_READ_SIZE = 128 * 1024
|
43 |
43 |
|
44 |
44 |
|
45 |
|
class BaseDRBD(base.BlockDev): # pylint: disable=W0223
|
46 |
|
"""Base DRBD class.
|
|
45 |
class DRBD8Status(object):
|
|
46 |
"""A DRBD status representation class.
|
47 |
47 |
|
48 |
|
This class contains a few bits of common functionality between the
|
49 |
|
0.7 and 8.x versions of DRBD.
|
|
48 |
Note that this class is meant to be used to parse one of the entries returned
|
|
49 |
from L{DRBD8._JoinProcDataPerMinor}.
|
|
50 |
|
|
51 |
"""
|
|
52 |
UNCONF_RE = re.compile(r"\s*[0-9]+:\s*cs:Unconfigured$")
|
|
53 |
LINE_RE = re.compile(r"\s*[0-9]+:\s*cs:(\S+)\s+(?:st|ro):([^/]+)/(\S+)"
|
|
54 |
"\s+ds:([^/]+)/(\S+)\s+.*$")
|
|
55 |
SYNC_RE = re.compile(r"^.*\ssync'ed:\s*([0-9.]+)%.*"
|
|
56 |
# Due to a bug in drbd in the kernel, introduced in
|
|
57 |
# commit 4b0715f096 (still unfixed as of 2011-08-22)
|
|
58 |
"(?:\s|M)"
|
|
59 |
"finish: ([0-9]+):([0-9]+):([0-9]+)\s.*$")
|
|
60 |
|
|
61 |
CS_UNCONFIGURED = "Unconfigured"
|
|
62 |
CS_STANDALONE = "StandAlone"
|
|
63 |
CS_WFCONNECTION = "WFConnection"
|
|
64 |
CS_WFREPORTPARAMS = "WFReportParams"
|
|
65 |
CS_CONNECTED = "Connected"
|
|
66 |
CS_STARTINGSYNCS = "StartingSyncS"
|
|
67 |
CS_STARTINGSYNCT = "StartingSyncT"
|
|
68 |
CS_WFBITMAPS = "WFBitMapS"
|
|
69 |
CS_WFBITMAPT = "WFBitMapT"
|
|
70 |
CS_WFSYNCUUID = "WFSyncUUID"
|
|
71 |
CS_SYNCSOURCE = "SyncSource"
|
|
72 |
CS_SYNCTARGET = "SyncTarget"
|
|
73 |
CS_PAUSEDSYNCS = "PausedSyncS"
|
|
74 |
CS_PAUSEDSYNCT = "PausedSyncT"
|
|
75 |
CSET_SYNC = compat.UniqueFrozenset([
|
|
76 |
CS_WFREPORTPARAMS,
|
|
77 |
CS_STARTINGSYNCS,
|
|
78 |
CS_STARTINGSYNCT,
|
|
79 |
CS_WFBITMAPS,
|
|
80 |
CS_WFBITMAPT,
|
|
81 |
CS_WFSYNCUUID,
|
|
82 |
CS_SYNCSOURCE,
|
|
83 |
CS_SYNCTARGET,
|
|
84 |
CS_PAUSEDSYNCS,
|
|
85 |
CS_PAUSEDSYNCT,
|
|
86 |
])
|
|
87 |
|
|
88 |
DS_DISKLESS = "Diskless"
|
|
89 |
DS_ATTACHING = "Attaching" # transient state
|
|
90 |
DS_FAILED = "Failed" # transient state, next: diskless
|
|
91 |
DS_NEGOTIATING = "Negotiating" # transient state
|
|
92 |
DS_INCONSISTENT = "Inconsistent" # while syncing or after creation
|
|
93 |
DS_OUTDATED = "Outdated"
|
|
94 |
DS_DUNKNOWN = "DUnknown" # shown for peer disk when not connected
|
|
95 |
DS_CONSISTENT = "Consistent"
|
|
96 |
DS_UPTODATE = "UpToDate" # normal state
|
|
97 |
|
|
98 |
RO_PRIMARY = "Primary"
|
|
99 |
RO_SECONDARY = "Secondary"
|
|
100 |
RO_UNKNOWN = "Unknown"
|
|
101 |
|
|
102 |
def __init__(self, procline):
|
|
103 |
u = self.UNCONF_RE.match(procline)
|
|
104 |
if u:
|
|
105 |
self.cstatus = self.CS_UNCONFIGURED
|
|
106 |
self.lrole = self.rrole = self.ldisk = self.rdisk = None
|
|
107 |
else:
|
|
108 |
m = self.LINE_RE.match(procline)
|
|
109 |
if not m:
|
|
110 |
raise errors.BlockDeviceError("Can't parse input data '%s'" % procline)
|
|
111 |
self.cstatus = m.group(1)
|
|
112 |
self.lrole = m.group(2)
|
|
113 |
self.rrole = m.group(3)
|
|
114 |
self.ldisk = m.group(4)
|
|
115 |
self.rdisk = m.group(5)
|
|
116 |
|
|
117 |
# end reading of data from the LINE_RE or UNCONF_RE
|
|
118 |
|
|
119 |
self.is_standalone = self.cstatus == self.CS_STANDALONE
|
|
120 |
self.is_wfconn = self.cstatus == self.CS_WFCONNECTION
|
|
121 |
self.is_connected = self.cstatus == self.CS_CONNECTED
|
|
122 |
self.is_primary = self.lrole == self.RO_PRIMARY
|
|
123 |
self.is_secondary = self.lrole == self.RO_SECONDARY
|
|
124 |
self.peer_primary = self.rrole == self.RO_PRIMARY
|
|
125 |
self.peer_secondary = self.rrole == self.RO_SECONDARY
|
|
126 |
self.both_primary = self.is_primary and self.peer_primary
|
|
127 |
self.both_secondary = self.is_secondary and self.peer_secondary
|
|
128 |
|
|
129 |
self.is_diskless = self.ldisk == self.DS_DISKLESS
|
|
130 |
self.is_disk_uptodate = self.ldisk == self.DS_UPTODATE
|
|
131 |
|
|
132 |
self.is_in_resync = self.cstatus in self.CSET_SYNC
|
|
133 |
self.is_in_use = self.cstatus != self.CS_UNCONFIGURED
|
|
134 |
|
|
135 |
m = self.SYNC_RE.match(procline)
|
|
136 |
if m:
|
|
137 |
self.sync_percent = float(m.group(1))
|
|
138 |
hours = int(m.group(2))
|
|
139 |
minutes = int(m.group(3))
|
|
140 |
seconds = int(m.group(4))
|
|
141 |
self.est_time = hours * 3600 + minutes * 60 + seconds
|
|
142 |
else:
|
|
143 |
# we have (in this if branch) no percent information, but if
|
|
144 |
# we're resyncing we need to 'fake' a sync percent information,
|
|
145 |
# as this is how cmdlib determines if it makes sense to wait for
|
|
146 |
# resyncing or not
|
|
147 |
if self.is_in_resync:
|
|
148 |
self.sync_percent = 0
|
|
149 |
else:
|
|
150 |
self.sync_percent = None
|
|
151 |
self.est_time = None
|
|
152 |
|
|
153 |
|
|
154 |
class DRBD8(base.BlockDev):
|
|
155 |
"""DRBD v8.x block device.
|
|
156 |
|
|
157 |
This implements the local host part of the DRBD device, i.e. it
|
|
158 |
doesn't do anything to the supposed peer. If you need a fully
|
|
159 |
connected DRBD pair, you need to use this class on both hosts.
|
|
160 |
|
|
161 |
The unique_id for the drbd device is a (local_ip, local_port,
|
|
162 |
remote_ip, remote_port, local_minor, secret) tuple, and it must have
|
|
163 |
two children: the data device and the meta_device. The meta device
|
|
164 |
is checked for valid size and is zeroed on create.
|
50 |
165 |
|
51 |
166 |
"""
|
52 |
167 |
_VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)(?:\.\d+)?"
|
... | ... | |
55 |
170 |
_UNUSED_LINE_RE = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
56 |
171 |
|
57 |
172 |
_DRBD_MAJOR = 147
|
58 |
|
_ST_UNCONFIGURED = "Unconfigured"
|
59 |
|
_ST_WFCONNECTION = "WFConnection"
|
60 |
|
_ST_CONNECTED = "Connected"
|
|
173 |
_ST_UNCONFIGURED = DRBD8Status.CS_UNCONFIGURED
|
|
174 |
_ST_WFCONNECTION = DRBD8Status.CS_WFCONNECTION
|
|
175 |
_ST_CONNECTED = DRBD8Status.CS_CONNECTED
|
61 |
176 |
|
62 |
177 |
_STATUS_FILE = constants.DRBD_STATUS_FILE
|
63 |
178 |
_USERMODE_HELPER_FILE = "/sys/module/drbd/parameters/usermode_helper"
|
64 |
179 |
|
|
180 |
_MAX_MINORS = 255
|
|
181 |
_PARSE_SHOW = None
|
|
182 |
|
|
183 |
# timeout constants
|
|
184 |
_NET_RECONFIG_TIMEOUT = 60
|
|
185 |
|
|
186 |
# command line options for barriers
|
|
187 |
_DISABLE_DISK_OPTION = "--no-disk-barrier" # -a
|
|
188 |
_DISABLE_DRAIN_OPTION = "--no-disk-drain" # -D
|
|
189 |
_DISABLE_FLUSH_OPTION = "--no-disk-flushes" # -i
|
|
190 |
_DISABLE_META_FLUSH_OPTION = "--no-md-flushes" # -m
|
|
191 |
|
|
192 |
def __init__(self, unique_id, children, size, params):
|
|
193 |
if children and children.count(None) > 0:
|
|
194 |
children = []
|
|
195 |
if len(children) not in (0, 2):
|
|
196 |
raise ValueError("Invalid configuration data %s" % str(children))
|
|
197 |
if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 6:
|
|
198 |
raise ValueError("Invalid configuration data %s" % str(unique_id))
|
|
199 |
(self._lhost, self._lport,
|
|
200 |
self._rhost, self._rport,
|
|
201 |
self._aminor, self._secret) = unique_id
|
|
202 |
if children:
|
|
203 |
if not _CanReadDevice(children[1].dev_path):
|
|
204 |
logging.info("drbd%s: Ignoring unreadable meta device", self._aminor)
|
|
205 |
children = []
|
|
206 |
super(DRBD8, self).__init__(unique_id, children, size, params)
|
|
207 |
self.major = self._DRBD_MAJOR
|
|
208 |
version = self._GetVersion(self._GetProcData())
|
|
209 |
if version["k_major"] != 8:
|
|
210 |
base.ThrowError("Mismatch in DRBD kernel version and requested ganeti"
|
|
211 |
" usage: kernel is %s.%s, ganeti wants 8.x",
|
|
212 |
version["k_major"], version["k_minor"])
|
|
213 |
|
|
214 |
if (self._lhost is not None and self._lhost == self._rhost and
|
|
215 |
self._lport == self._rport):
|
|
216 |
raise ValueError("Invalid configuration data, same local/remote %s" %
|
|
217 |
(unique_id,))
|
|
218 |
self.Attach()
|
|
219 |
|
65 |
220 |
@staticmethod
|
66 |
221 |
def _GetProcData(filename=_STATUS_FILE):
|
67 |
222 |
"""Return data from /proc/drbd.
|
... | ... | |
228 |
383 |
base.ThrowError("Meta device too big (%.2fMiB)",
|
229 |
384 |
(num_bytes / 1024 / 1024))
|
230 |
385 |
|
231 |
|
def Rename(self, new_id):
|
232 |
|
"""Rename a device.
|
233 |
|
|
234 |
|
This is not supported for drbd devices.
|
235 |
|
|
236 |
|
"""
|
237 |
|
raise errors.ProgrammerError("Can't rename a drbd device")
|
238 |
|
|
239 |
|
|
240 |
|
class DRBD8Status(object):
|
241 |
|
"""A DRBD status representation class.
|
242 |
|
|
243 |
|
Note that this doesn't support unconfigured devices (cs:Unconfigured).
|
244 |
|
|
245 |
|
"""
|
246 |
|
UNCONF_RE = re.compile(r"\s*[0-9]+:\s*cs:Unconfigured$")
|
247 |
|
LINE_RE = re.compile(r"\s*[0-9]+:\s*cs:(\S+)\s+(?:st|ro):([^/]+)/(\S+)"
|
248 |
|
"\s+ds:([^/]+)/(\S+)\s+.*$")
|
249 |
|
SYNC_RE = re.compile(r"^.*\ssync'ed:\s*([0-9.]+)%.*"
|
250 |
|
# Due to a bug in drbd in the kernel, introduced in
|
251 |
|
# commit 4b0715f096 (still unfixed as of 2011-08-22)
|
252 |
|
"(?:\s|M)"
|
253 |
|
"finish: ([0-9]+):([0-9]+):([0-9]+)\s.*$")
|
254 |
|
|
255 |
|
CS_UNCONFIGURED = "Unconfigured"
|
256 |
|
CS_STANDALONE = "StandAlone"
|
257 |
|
CS_WFCONNECTION = "WFConnection"
|
258 |
|
CS_WFREPORTPARAMS = "WFReportParams"
|
259 |
|
CS_CONNECTED = "Connected"
|
260 |
|
CS_STARTINGSYNCS = "StartingSyncS"
|
261 |
|
CS_STARTINGSYNCT = "StartingSyncT"
|
262 |
|
CS_WFBITMAPS = "WFBitMapS"
|
263 |
|
CS_WFBITMAPT = "WFBitMapT"
|
264 |
|
CS_WFSYNCUUID = "WFSyncUUID"
|
265 |
|
CS_SYNCSOURCE = "SyncSource"
|
266 |
|
CS_SYNCTARGET = "SyncTarget"
|
267 |
|
CS_PAUSEDSYNCS = "PausedSyncS"
|
268 |
|
CS_PAUSEDSYNCT = "PausedSyncT"
|
269 |
|
CSET_SYNC = compat.UniqueFrozenset([
|
270 |
|
CS_WFREPORTPARAMS,
|
271 |
|
CS_STARTINGSYNCS,
|
272 |
|
CS_STARTINGSYNCT,
|
273 |
|
CS_WFBITMAPS,
|
274 |
|
CS_WFBITMAPT,
|
275 |
|
CS_WFSYNCUUID,
|
276 |
|
CS_SYNCSOURCE,
|
277 |
|
CS_SYNCTARGET,
|
278 |
|
CS_PAUSEDSYNCS,
|
279 |
|
CS_PAUSEDSYNCT,
|
280 |
|
])
|
281 |
|
|
282 |
|
DS_DISKLESS = "Diskless"
|
283 |
|
DS_ATTACHING = "Attaching" # transient state
|
284 |
|
DS_FAILED = "Failed" # transient state, next: diskless
|
285 |
|
DS_NEGOTIATING = "Negotiating" # transient state
|
286 |
|
DS_INCONSISTENT = "Inconsistent" # while syncing or after creation
|
287 |
|
DS_OUTDATED = "Outdated"
|
288 |
|
DS_DUNKNOWN = "DUnknown" # shown for peer disk when not connected
|
289 |
|
DS_CONSISTENT = "Consistent"
|
290 |
|
DS_UPTODATE = "UpToDate" # normal state
|
291 |
|
|
292 |
|
RO_PRIMARY = "Primary"
|
293 |
|
RO_SECONDARY = "Secondary"
|
294 |
|
RO_UNKNOWN = "Unknown"
|
295 |
|
|
296 |
|
def __init__(self, procline):
|
297 |
|
u = self.UNCONF_RE.match(procline)
|
298 |
|
if u:
|
299 |
|
self.cstatus = self.CS_UNCONFIGURED
|
300 |
|
self.lrole = self.rrole = self.ldisk = self.rdisk = None
|
301 |
|
else:
|
302 |
|
m = self.LINE_RE.match(procline)
|
303 |
|
if not m:
|
304 |
|
raise errors.BlockDeviceError("Can't parse input data '%s'" % procline)
|
305 |
|
self.cstatus = m.group(1)
|
306 |
|
self.lrole = m.group(2)
|
307 |
|
self.rrole = m.group(3)
|
308 |
|
self.ldisk = m.group(4)
|
309 |
|
self.rdisk = m.group(5)
|
310 |
|
|
311 |
|
# end reading of data from the LINE_RE or UNCONF_RE
|
312 |
|
|
313 |
|
self.is_standalone = self.cstatus == self.CS_STANDALONE
|
314 |
|
self.is_wfconn = self.cstatus == self.CS_WFCONNECTION
|
315 |
|
self.is_connected = self.cstatus == self.CS_CONNECTED
|
316 |
|
self.is_primary = self.lrole == self.RO_PRIMARY
|
317 |
|
self.is_secondary = self.lrole == self.RO_SECONDARY
|
318 |
|
self.peer_primary = self.rrole == self.RO_PRIMARY
|
319 |
|
self.peer_secondary = self.rrole == self.RO_SECONDARY
|
320 |
|
self.both_primary = self.is_primary and self.peer_primary
|
321 |
|
self.both_secondary = self.is_secondary and self.peer_secondary
|
322 |
|
|
323 |
|
self.is_diskless = self.ldisk == self.DS_DISKLESS
|
324 |
|
self.is_disk_uptodate = self.ldisk == self.DS_UPTODATE
|
325 |
|
|
326 |
|
self.is_in_resync = self.cstatus in self.CSET_SYNC
|
327 |
|
self.is_in_use = self.cstatus != self.CS_UNCONFIGURED
|
328 |
|
|
329 |
|
m = self.SYNC_RE.match(procline)
|
330 |
|
if m:
|
331 |
|
self.sync_percent = float(m.group(1))
|
332 |
|
hours = int(m.group(2))
|
333 |
|
minutes = int(m.group(3))
|
334 |
|
seconds = int(m.group(4))
|
335 |
|
self.est_time = hours * 3600 + minutes * 60 + seconds
|
336 |
|
else:
|
337 |
|
# we have (in this if branch) no percent information, but if
|
338 |
|
# we're resyncing we need to 'fake' a sync percent information,
|
339 |
|
# as this is how cmdlib determines if it makes sense to wait for
|
340 |
|
# resyncing or not
|
341 |
|
if self.is_in_resync:
|
342 |
|
self.sync_percent = 0
|
343 |
|
else:
|
344 |
|
self.sync_percent = None
|
345 |
|
self.est_time = None
|
346 |
|
|
347 |
|
|
348 |
|
class DRBD8(BaseDRBD):
|
349 |
|
"""DRBD v8.x block device.
|
350 |
|
|
351 |
|
This implements the local host part of the DRBD device, i.e. it
|
352 |
|
doesn't do anything to the supposed peer. If you need a fully
|
353 |
|
connected DRBD pair, you need to use this class on both hosts.
|
354 |
|
|
355 |
|
The unique_id for the drbd device is a (local_ip, local_port,
|
356 |
|
remote_ip, remote_port, local_minor, secret) tuple, and it must have
|
357 |
|
two children: the data device and the meta_device. The meta device
|
358 |
|
is checked for valid size and is zeroed on create.
|
359 |
|
|
360 |
|
"""
|
361 |
|
_MAX_MINORS = 255
|
362 |
|
_PARSE_SHOW = None
|
363 |
|
|
364 |
|
# timeout constants
|
365 |
|
_NET_RECONFIG_TIMEOUT = 60
|
366 |
|
|
367 |
|
# command line options for barriers
|
368 |
|
_DISABLE_DISK_OPTION = "--no-disk-barrier" # -a
|
369 |
|
_DISABLE_DRAIN_OPTION = "--no-disk-drain" # -D
|
370 |
|
_DISABLE_FLUSH_OPTION = "--no-disk-flushes" # -i
|
371 |
|
_DISABLE_META_FLUSH_OPTION = "--no-md-flushes" # -m
|
372 |
|
|
373 |
|
def __init__(self, unique_id, children, size, params):
|
374 |
|
if children and children.count(None) > 0:
|
375 |
|
children = []
|
376 |
|
if len(children) not in (0, 2):
|
377 |
|
raise ValueError("Invalid configuration data %s" % str(children))
|
378 |
|
if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 6:
|
379 |
|
raise ValueError("Invalid configuration data %s" % str(unique_id))
|
380 |
|
(self._lhost, self._lport,
|
381 |
|
self._rhost, self._rport,
|
382 |
|
self._aminor, self._secret) = unique_id
|
383 |
|
if children:
|
384 |
|
if not _CanReadDevice(children[1].dev_path):
|
385 |
|
logging.info("drbd%s: Ignoring unreadable meta device", self._aminor)
|
386 |
|
children = []
|
387 |
|
super(DRBD8, self).__init__(unique_id, children, size, params)
|
388 |
|
self.major = self._DRBD_MAJOR
|
389 |
|
version = self._GetVersion(self._GetProcData())
|
390 |
|
if version["k_major"] != 8:
|
391 |
|
base.ThrowError("Mismatch in DRBD kernel version and requested ganeti"
|
392 |
|
" usage: kernel is %s.%s, ganeti wants 8.x",
|
393 |
|
version["k_major"], version["k_minor"])
|
394 |
|
|
395 |
|
if (self._lhost is not None and self._lhost == self._rhost and
|
396 |
|
self._lport == self._rport):
|
397 |
|
raise ValueError("Invalid configuration data, same local/remote %s" %
|
398 |
|
(unique_id,))
|
399 |
|
self.Attach()
|
400 |
|
|
401 |
386 |
@classmethod
|
402 |
387 |
def _InitMeta(cls, minor, dev_path):
|
403 |
388 |
"""Initialize a meta device.
|
... | ... | |
1304 |
1289 |
"""
|
1305 |
1290 |
self.Shutdown()
|
1306 |
1291 |
|
|
1292 |
def Rename(self, new_id):
|
|
1293 |
"""Rename a device.
|
|
1294 |
|
|
1295 |
This is not supported for drbd devices.
|
|
1296 |
|
|
1297 |
"""
|
|
1298 |
raise errors.ProgrammerError("Can't rename a drbd device")
|
|
1299 |
|
1307 |
1300 |
@classmethod
|
1308 |
1301 |
def Create(cls, unique_id, children, size, params, excl_stor):
|
1309 |
1302 |
"""Create a new DRBD8 device.
|