root / lib / block / drbd.py @ fd300bc7
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1 | 89ff748d | Thomas Thrainer | #
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2 | 89ff748d | Thomas Thrainer | #
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3 | 89ff748d | Thomas Thrainer | |
4 | 89ff748d | Thomas Thrainer | # Copyright (C) 2006, 2007, 2010, 2011, 2012, 2013 Google Inc.
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5 | 89ff748d | Thomas Thrainer | #
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6 | 89ff748d | Thomas Thrainer | # This program is free software; you can redistribute it and/or modify
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7 | 89ff748d | Thomas Thrainer | # it under the terms of the GNU General Public License as published by
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8 | 89ff748d | Thomas Thrainer | # the Free Software Foundation; either version 2 of the License, or
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9 | 89ff748d | Thomas Thrainer | # (at your option) any later version.
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10 | 89ff748d | Thomas Thrainer | #
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11 | 89ff748d | Thomas Thrainer | # This program is distributed in the hope that it will be useful, but
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12 | 89ff748d | Thomas Thrainer | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 89ff748d | Thomas Thrainer | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 89ff748d | Thomas Thrainer | # General Public License for more details.
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15 | 89ff748d | Thomas Thrainer | #
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16 | 89ff748d | Thomas Thrainer | # You should have received a copy of the GNU General Public License
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17 | 89ff748d | Thomas Thrainer | # along with this program; if not, write to the Free Software
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18 | 89ff748d | Thomas Thrainer | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 89ff748d | Thomas Thrainer | # 02110-1301, USA.
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20 | 89ff748d | Thomas Thrainer | |
21 | 89ff748d | Thomas Thrainer | |
22 | 89ff748d | Thomas Thrainer | """DRBD block device related functionality"""
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23 | 89ff748d | Thomas Thrainer | |
24 | 89ff748d | Thomas Thrainer | import errno |
25 | 89ff748d | Thomas Thrainer | import logging |
26 | 89ff748d | Thomas Thrainer | import pyparsing as pyp |
27 | 89ff748d | Thomas Thrainer | import re |
28 | 89ff748d | Thomas Thrainer | import shlex |
29 | 89ff748d | Thomas Thrainer | import time |
30 | 89ff748d | Thomas Thrainer | |
31 | 89ff748d | Thomas Thrainer | from ganeti import constants |
32 | 89ff748d | Thomas Thrainer | from ganeti import utils |
33 | 89ff748d | Thomas Thrainer | from ganeti import errors |
34 | 89ff748d | Thomas Thrainer | from ganeti import compat |
35 | 89ff748d | Thomas Thrainer | from ganeti import netutils |
36 | 89ff748d | Thomas Thrainer | from ganeti import objects |
37 | 89ff748d | Thomas Thrainer | from ganeti.block import base |
38 | 89ff748d | Thomas Thrainer | |
39 | 89ff748d | Thomas Thrainer | |
40 | 89ff748d | Thomas Thrainer | # Size of reads in _CanReadDevice
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41 | 89ff748d | Thomas Thrainer | |
42 | 89ff748d | Thomas Thrainer | _DEVICE_READ_SIZE = 128 * 1024 |
43 | 89ff748d | Thomas Thrainer | |
44 | 89ff748d | Thomas Thrainer | |
45 | fd300bc7 | Thomas Thrainer | class DRBD8Status(object): |
46 | fd300bc7 | Thomas Thrainer | """A DRBD status representation class.
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47 | 89ff748d | Thomas Thrainer |
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48 | fd300bc7 | Thomas Thrainer | Note that this class is meant to be used to parse one of the entries returned
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49 | fd300bc7 | Thomas Thrainer | from L{DRBD8._JoinProcDataPerMinor}.
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50 | fd300bc7 | Thomas Thrainer |
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51 | fd300bc7 | Thomas Thrainer | """
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52 | fd300bc7 | Thomas Thrainer | UNCONF_RE = re.compile(r"\s*[0-9]+:\s*cs:Unconfigured$")
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53 | fd300bc7 | Thomas Thrainer | LINE_RE = re.compile(r"\s*[0-9]+:\s*cs:(\S+)\s+(?:st|ro):([^/]+)/(\S+)"
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54 | fd300bc7 | Thomas Thrainer | "\s+ds:([^/]+)/(\S+)\s+.*$")
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55 | fd300bc7 | Thomas Thrainer | SYNC_RE = re.compile(r"^.*\ssync'ed:\s*([0-9.]+)%.*"
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56 | fd300bc7 | Thomas Thrainer | # Due to a bug in drbd in the kernel, introduced in
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57 | fd300bc7 | Thomas Thrainer | # commit 4b0715f096 (still unfixed as of 2011-08-22)
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58 | fd300bc7 | Thomas Thrainer | "(?:\s|M)"
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59 | fd300bc7 | Thomas Thrainer | "finish: ([0-9]+):([0-9]+):([0-9]+)\s.*$")
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60 | fd300bc7 | Thomas Thrainer | |
61 | fd300bc7 | Thomas Thrainer | CS_UNCONFIGURED = "Unconfigured"
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62 | fd300bc7 | Thomas Thrainer | CS_STANDALONE = "StandAlone"
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63 | fd300bc7 | Thomas Thrainer | CS_WFCONNECTION = "WFConnection"
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64 | fd300bc7 | Thomas Thrainer | CS_WFREPORTPARAMS = "WFReportParams"
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65 | fd300bc7 | Thomas Thrainer | CS_CONNECTED = "Connected"
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66 | fd300bc7 | Thomas Thrainer | CS_STARTINGSYNCS = "StartingSyncS"
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67 | fd300bc7 | Thomas Thrainer | CS_STARTINGSYNCT = "StartingSyncT"
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68 | fd300bc7 | Thomas Thrainer | CS_WFBITMAPS = "WFBitMapS"
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69 | fd300bc7 | Thomas Thrainer | CS_WFBITMAPT = "WFBitMapT"
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70 | fd300bc7 | Thomas Thrainer | CS_WFSYNCUUID = "WFSyncUUID"
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71 | fd300bc7 | Thomas Thrainer | CS_SYNCSOURCE = "SyncSource"
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72 | fd300bc7 | Thomas Thrainer | CS_SYNCTARGET = "SyncTarget"
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73 | fd300bc7 | Thomas Thrainer | CS_PAUSEDSYNCS = "PausedSyncS"
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74 | fd300bc7 | Thomas Thrainer | CS_PAUSEDSYNCT = "PausedSyncT"
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75 | fd300bc7 | Thomas Thrainer | CSET_SYNC = compat.UniqueFrozenset([ |
76 | fd300bc7 | Thomas Thrainer | CS_WFREPORTPARAMS, |
77 | fd300bc7 | Thomas Thrainer | CS_STARTINGSYNCS, |
78 | fd300bc7 | Thomas Thrainer | CS_STARTINGSYNCT, |
79 | fd300bc7 | Thomas Thrainer | CS_WFBITMAPS, |
80 | fd300bc7 | Thomas Thrainer | CS_WFBITMAPT, |
81 | fd300bc7 | Thomas Thrainer | CS_WFSYNCUUID, |
82 | fd300bc7 | Thomas Thrainer | CS_SYNCSOURCE, |
83 | fd300bc7 | Thomas Thrainer | CS_SYNCTARGET, |
84 | fd300bc7 | Thomas Thrainer | CS_PAUSEDSYNCS, |
85 | fd300bc7 | Thomas Thrainer | CS_PAUSEDSYNCT, |
86 | fd300bc7 | Thomas Thrainer | ]) |
87 | fd300bc7 | Thomas Thrainer | |
88 | fd300bc7 | Thomas Thrainer | DS_DISKLESS = "Diskless"
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89 | fd300bc7 | Thomas Thrainer | DS_ATTACHING = "Attaching" # transient state |
90 | fd300bc7 | Thomas Thrainer | DS_FAILED = "Failed" # transient state, next: diskless |
91 | fd300bc7 | Thomas Thrainer | DS_NEGOTIATING = "Negotiating" # transient state |
92 | fd300bc7 | Thomas Thrainer | DS_INCONSISTENT = "Inconsistent" # while syncing or after creation |
93 | fd300bc7 | Thomas Thrainer | DS_OUTDATED = "Outdated"
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94 | fd300bc7 | Thomas Thrainer | DS_DUNKNOWN = "DUnknown" # shown for peer disk when not connected |
95 | fd300bc7 | Thomas Thrainer | DS_CONSISTENT = "Consistent"
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96 | fd300bc7 | Thomas Thrainer | DS_UPTODATE = "UpToDate" # normal state |
97 | fd300bc7 | Thomas Thrainer | |
98 | fd300bc7 | Thomas Thrainer | RO_PRIMARY = "Primary"
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99 | fd300bc7 | Thomas Thrainer | RO_SECONDARY = "Secondary"
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100 | fd300bc7 | Thomas Thrainer | RO_UNKNOWN = "Unknown"
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101 | fd300bc7 | Thomas Thrainer | |
102 | fd300bc7 | Thomas Thrainer | def __init__(self, procline): |
103 | fd300bc7 | Thomas Thrainer | u = self.UNCONF_RE.match(procline)
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104 | fd300bc7 | Thomas Thrainer | if u:
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105 | fd300bc7 | Thomas Thrainer | self.cstatus = self.CS_UNCONFIGURED |
106 | fd300bc7 | Thomas Thrainer | self.lrole = self.rrole = self.ldisk = self.rdisk = None |
107 | fd300bc7 | Thomas Thrainer | else:
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108 | fd300bc7 | Thomas Thrainer | m = self.LINE_RE.match(procline)
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109 | fd300bc7 | Thomas Thrainer | if not m: |
110 | fd300bc7 | Thomas Thrainer | raise errors.BlockDeviceError("Can't parse input data '%s'" % procline) |
111 | fd300bc7 | Thomas Thrainer | self.cstatus = m.group(1) |
112 | fd300bc7 | Thomas Thrainer | self.lrole = m.group(2) |
113 | fd300bc7 | Thomas Thrainer | self.rrole = m.group(3) |
114 | fd300bc7 | Thomas Thrainer | self.ldisk = m.group(4) |
115 | fd300bc7 | Thomas Thrainer | self.rdisk = m.group(5) |
116 | fd300bc7 | Thomas Thrainer | |
117 | fd300bc7 | Thomas Thrainer | # end reading of data from the LINE_RE or UNCONF_RE
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118 | fd300bc7 | Thomas Thrainer | |
119 | fd300bc7 | Thomas Thrainer | self.is_standalone = self.cstatus == self.CS_STANDALONE |
120 | fd300bc7 | Thomas Thrainer | self.is_wfconn = self.cstatus == self.CS_WFCONNECTION |
121 | fd300bc7 | Thomas Thrainer | self.is_connected = self.cstatus == self.CS_CONNECTED |
122 | fd300bc7 | Thomas Thrainer | self.is_primary = self.lrole == self.RO_PRIMARY |
123 | fd300bc7 | Thomas Thrainer | self.is_secondary = self.lrole == self.RO_SECONDARY |
124 | fd300bc7 | Thomas Thrainer | self.peer_primary = self.rrole == self.RO_PRIMARY |
125 | fd300bc7 | Thomas Thrainer | self.peer_secondary = self.rrole == self.RO_SECONDARY |
126 | fd300bc7 | Thomas Thrainer | self.both_primary = self.is_primary and self.peer_primary |
127 | fd300bc7 | Thomas Thrainer | self.both_secondary = self.is_secondary and self.peer_secondary |
128 | fd300bc7 | Thomas Thrainer | |
129 | fd300bc7 | Thomas Thrainer | self.is_diskless = self.ldisk == self.DS_DISKLESS |
130 | fd300bc7 | Thomas Thrainer | self.is_disk_uptodate = self.ldisk == self.DS_UPTODATE |
131 | fd300bc7 | Thomas Thrainer | |
132 | fd300bc7 | Thomas Thrainer | self.is_in_resync = self.cstatus in self.CSET_SYNC |
133 | fd300bc7 | Thomas Thrainer | self.is_in_use = self.cstatus != self.CS_UNCONFIGURED |
134 | fd300bc7 | Thomas Thrainer | |
135 | fd300bc7 | Thomas Thrainer | m = self.SYNC_RE.match(procline)
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136 | fd300bc7 | Thomas Thrainer | if m:
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137 | fd300bc7 | Thomas Thrainer | self.sync_percent = float(m.group(1)) |
138 | fd300bc7 | Thomas Thrainer | hours = int(m.group(2)) |
139 | fd300bc7 | Thomas Thrainer | minutes = int(m.group(3)) |
140 | fd300bc7 | Thomas Thrainer | seconds = int(m.group(4)) |
141 | fd300bc7 | Thomas Thrainer | self.est_time = hours * 3600 + minutes * 60 + seconds |
142 | fd300bc7 | Thomas Thrainer | else:
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143 | fd300bc7 | Thomas Thrainer | # we have (in this if branch) no percent information, but if
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144 | fd300bc7 | Thomas Thrainer | # we're resyncing we need to 'fake' a sync percent information,
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145 | fd300bc7 | Thomas Thrainer | # as this is how cmdlib determines if it makes sense to wait for
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146 | fd300bc7 | Thomas Thrainer | # resyncing or not
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147 | fd300bc7 | Thomas Thrainer | if self.is_in_resync: |
148 | fd300bc7 | Thomas Thrainer | self.sync_percent = 0 |
149 | fd300bc7 | Thomas Thrainer | else:
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150 | fd300bc7 | Thomas Thrainer | self.sync_percent = None |
151 | fd300bc7 | Thomas Thrainer | self.est_time = None |
152 | fd300bc7 | Thomas Thrainer | |
153 | fd300bc7 | Thomas Thrainer | |
154 | fd300bc7 | Thomas Thrainer | class DRBD8(base.BlockDev): |
155 | fd300bc7 | Thomas Thrainer | """DRBD v8.x block device.
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156 | fd300bc7 | Thomas Thrainer |
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157 | fd300bc7 | Thomas Thrainer | This implements the local host part of the DRBD device, i.e. it
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158 | fd300bc7 | Thomas Thrainer | doesn't do anything to the supposed peer. If you need a fully
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159 | fd300bc7 | Thomas Thrainer | connected DRBD pair, you need to use this class on both hosts.
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160 | fd300bc7 | Thomas Thrainer |
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161 | fd300bc7 | Thomas Thrainer | The unique_id for the drbd device is a (local_ip, local_port,
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162 | fd300bc7 | Thomas Thrainer | remote_ip, remote_port, local_minor, secret) tuple, and it must have
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163 | fd300bc7 | Thomas Thrainer | two children: the data device and the meta_device. The meta device
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164 | fd300bc7 | Thomas Thrainer | is checked for valid size and is zeroed on create.
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165 | 89ff748d | Thomas Thrainer |
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166 | 89ff748d | Thomas Thrainer | """
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167 | 89ff748d | Thomas Thrainer | _VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)(?:\.\d+)?"
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168 | 89ff748d | Thomas Thrainer | r" \(api:(\d+)/proto:(\d+)(?:-(\d+))?\)")
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169 | 89ff748d | Thomas Thrainer | _VALID_LINE_RE = re.compile("^ *([0-9]+): cs:([^ ]+).*$")
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170 | 89ff748d | Thomas Thrainer | _UNUSED_LINE_RE = re.compile("^ *([0-9]+): cs:Unconfigured$")
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171 | 89ff748d | Thomas Thrainer | |
172 | 89ff748d | Thomas Thrainer | _DRBD_MAJOR = 147
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173 | fd300bc7 | Thomas Thrainer | _ST_UNCONFIGURED = DRBD8Status.CS_UNCONFIGURED |
174 | fd300bc7 | Thomas Thrainer | _ST_WFCONNECTION = DRBD8Status.CS_WFCONNECTION |
175 | fd300bc7 | Thomas Thrainer | _ST_CONNECTED = DRBD8Status.CS_CONNECTED |
176 | 89ff748d | Thomas Thrainer | |
177 | 89ff748d | Thomas Thrainer | _STATUS_FILE = constants.DRBD_STATUS_FILE |
178 | 89ff748d | Thomas Thrainer | _USERMODE_HELPER_FILE = "/sys/module/drbd/parameters/usermode_helper"
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179 | 89ff748d | Thomas Thrainer | |
180 | fd300bc7 | Thomas Thrainer | _MAX_MINORS = 255
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181 | fd300bc7 | Thomas Thrainer | _PARSE_SHOW = None
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182 | fd300bc7 | Thomas Thrainer | |
183 | fd300bc7 | Thomas Thrainer | # timeout constants
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184 | fd300bc7 | Thomas Thrainer | _NET_RECONFIG_TIMEOUT = 60
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185 | fd300bc7 | Thomas Thrainer | |
186 | fd300bc7 | Thomas Thrainer | # command line options for barriers
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187 | fd300bc7 | Thomas Thrainer | _DISABLE_DISK_OPTION = "--no-disk-barrier" # -a |
188 | fd300bc7 | Thomas Thrainer | _DISABLE_DRAIN_OPTION = "--no-disk-drain" # -D |
189 | fd300bc7 | Thomas Thrainer | _DISABLE_FLUSH_OPTION = "--no-disk-flushes" # -i |
190 | fd300bc7 | Thomas Thrainer | _DISABLE_META_FLUSH_OPTION = "--no-md-flushes" # -m |
191 | fd300bc7 | Thomas Thrainer | |
192 | fd300bc7 | Thomas Thrainer | def __init__(self, unique_id, children, size, params): |
193 | fd300bc7 | Thomas Thrainer | if children and children.count(None) > 0: |
194 | fd300bc7 | Thomas Thrainer | children = [] |
195 | fd300bc7 | Thomas Thrainer | if len(children) not in (0, 2): |
196 | fd300bc7 | Thomas Thrainer | raise ValueError("Invalid configuration data %s" % str(children)) |
197 | fd300bc7 | Thomas Thrainer | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 6: |
198 | fd300bc7 | Thomas Thrainer | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
199 | fd300bc7 | Thomas Thrainer | (self._lhost, self._lport, |
200 | fd300bc7 | Thomas Thrainer | self._rhost, self._rport, |
201 | fd300bc7 | Thomas Thrainer | self._aminor, self._secret) = unique_id |
202 | fd300bc7 | Thomas Thrainer | if children:
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203 | fd300bc7 | Thomas Thrainer | if not _CanReadDevice(children[1].dev_path): |
204 | fd300bc7 | Thomas Thrainer | logging.info("drbd%s: Ignoring unreadable meta device", self._aminor) |
205 | fd300bc7 | Thomas Thrainer | children = [] |
206 | fd300bc7 | Thomas Thrainer | super(DRBD8, self).__init__(unique_id, children, size, params) |
207 | fd300bc7 | Thomas Thrainer | self.major = self._DRBD_MAJOR |
208 | fd300bc7 | Thomas Thrainer | version = self._GetVersion(self._GetProcData()) |
209 | fd300bc7 | Thomas Thrainer | if version["k_major"] != 8: |
210 | fd300bc7 | Thomas Thrainer | base.ThrowError("Mismatch in DRBD kernel version and requested ganeti"
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211 | fd300bc7 | Thomas Thrainer | " usage: kernel is %s.%s, ganeti wants 8.x",
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212 | fd300bc7 | Thomas Thrainer | version["k_major"], version["k_minor"]) |
213 | fd300bc7 | Thomas Thrainer | |
214 | fd300bc7 | Thomas Thrainer | if (self._lhost is not None and self._lhost == self._rhost and |
215 | fd300bc7 | Thomas Thrainer | self._lport == self._rport): |
216 | fd300bc7 | Thomas Thrainer | raise ValueError("Invalid configuration data, same local/remote %s" % |
217 | fd300bc7 | Thomas Thrainer | (unique_id,)) |
218 | fd300bc7 | Thomas Thrainer | self.Attach()
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219 | fd300bc7 | Thomas Thrainer | |
220 | 89ff748d | Thomas Thrainer | @staticmethod
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221 | 89ff748d | Thomas Thrainer | def _GetProcData(filename=_STATUS_FILE): |
222 | 89ff748d | Thomas Thrainer | """Return data from /proc/drbd.
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223 | 89ff748d | Thomas Thrainer |
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224 | 89ff748d | Thomas Thrainer | """
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225 | 89ff748d | Thomas Thrainer | try:
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226 | 89ff748d | Thomas Thrainer | data = utils.ReadFile(filename).splitlines() |
227 | 89ff748d | Thomas Thrainer | except EnvironmentError, err: |
228 | 89ff748d | Thomas Thrainer | if err.errno == errno.ENOENT:
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229 | 89ff748d | Thomas Thrainer | base.ThrowError("The file %s cannot be opened, check if the module"
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230 | 89ff748d | Thomas Thrainer | " is loaded (%s)", filename, str(err)) |
231 | 89ff748d | Thomas Thrainer | else:
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232 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't read the DRBD proc file %s: %s",
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233 | 89ff748d | Thomas Thrainer | filename, str(err))
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234 | 89ff748d | Thomas Thrainer | if not data: |
235 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't read any data from %s", filename)
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236 | 89ff748d | Thomas Thrainer | return data
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237 | 89ff748d | Thomas Thrainer | |
238 | 89ff748d | Thomas Thrainer | @classmethod
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239 | 38396ae2 | Thomas Thrainer | def _JoinProcDataPerMinor(cls, data): |
240 | 89ff748d | Thomas Thrainer | """Transform the output of _GetProdData into a nicer form.
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241 | 89ff748d | Thomas Thrainer |
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242 | 89ff748d | Thomas Thrainer | @return: a dictionary of minor: joined lines from /proc/drbd
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243 | 89ff748d | Thomas Thrainer | for that minor
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244 | 89ff748d | Thomas Thrainer |
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245 | 89ff748d | Thomas Thrainer | """
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246 | 89ff748d | Thomas Thrainer | results = {} |
247 | 89ff748d | Thomas Thrainer | old_minor = old_line = None
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248 | 89ff748d | Thomas Thrainer | for line in data: |
249 | 89ff748d | Thomas Thrainer | if not line: # completely empty lines, as can be returned by drbd8.0+ |
250 | 89ff748d | Thomas Thrainer | continue
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251 | 89ff748d | Thomas Thrainer | lresult = cls._VALID_LINE_RE.match(line) |
252 | 89ff748d | Thomas Thrainer | if lresult is not None: |
253 | 89ff748d | Thomas Thrainer | if old_minor is not None: |
254 | 89ff748d | Thomas Thrainer | results[old_minor] = old_line |
255 | 89ff748d | Thomas Thrainer | old_minor = int(lresult.group(1)) |
256 | 89ff748d | Thomas Thrainer | old_line = line |
257 | 89ff748d | Thomas Thrainer | else:
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258 | 89ff748d | Thomas Thrainer | if old_minor is not None: |
259 | 89ff748d | Thomas Thrainer | old_line += " " + line.strip()
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260 | 89ff748d | Thomas Thrainer | # add last line
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261 | 89ff748d | Thomas Thrainer | if old_minor is not None: |
262 | 89ff748d | Thomas Thrainer | results[old_minor] = old_line |
263 | 89ff748d | Thomas Thrainer | return results
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264 | 89ff748d | Thomas Thrainer | |
265 | 89ff748d | Thomas Thrainer | @classmethod
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266 | 89ff748d | Thomas Thrainer | def _GetVersion(cls, proc_data): |
267 | 89ff748d | Thomas Thrainer | """Return the DRBD version.
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268 | 89ff748d | Thomas Thrainer |
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269 | 89ff748d | Thomas Thrainer | This will return a dict with keys:
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270 | 89ff748d | Thomas Thrainer | - k_major
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271 | 89ff748d | Thomas Thrainer | - k_minor
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272 | 89ff748d | Thomas Thrainer | - k_point
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273 | 89ff748d | Thomas Thrainer | - api
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274 | 89ff748d | Thomas Thrainer | - proto
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275 | 89ff748d | Thomas Thrainer | - proto2 (only on drbd > 8.2.X)
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276 | 89ff748d | Thomas Thrainer |
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277 | 89ff748d | Thomas Thrainer | """
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278 | 89ff748d | Thomas Thrainer | first_line = proc_data[0].strip()
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279 | 89ff748d | Thomas Thrainer | version = cls._VERSION_RE.match(first_line) |
280 | 89ff748d | Thomas Thrainer | if not version: |
281 | 89ff748d | Thomas Thrainer | raise errors.BlockDeviceError("Can't parse DRBD version from '%s'" % |
282 | 89ff748d | Thomas Thrainer | first_line) |
283 | 89ff748d | Thomas Thrainer | |
284 | 89ff748d | Thomas Thrainer | values = version.groups() |
285 | 89ff748d | Thomas Thrainer | retval = { |
286 | 89ff748d | Thomas Thrainer | "k_major": int(values[0]), |
287 | 89ff748d | Thomas Thrainer | "k_minor": int(values[1]), |
288 | 89ff748d | Thomas Thrainer | "k_point": int(values[2]), |
289 | 89ff748d | Thomas Thrainer | "api": int(values[3]), |
290 | 89ff748d | Thomas Thrainer | "proto": int(values[4]), |
291 | 89ff748d | Thomas Thrainer | } |
292 | 89ff748d | Thomas Thrainer | if values[5] is not None: |
293 | 89ff748d | Thomas Thrainer | retval["proto2"] = values[5] |
294 | 89ff748d | Thomas Thrainer | |
295 | 89ff748d | Thomas Thrainer | return retval
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296 | 89ff748d | Thomas Thrainer | |
297 | 89ff748d | Thomas Thrainer | @staticmethod
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298 | 89ff748d | Thomas Thrainer | def GetUsermodeHelper(filename=_USERMODE_HELPER_FILE): |
299 | 89ff748d | Thomas Thrainer | """Returns DRBD usermode_helper currently set.
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300 | 89ff748d | Thomas Thrainer |
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301 | 89ff748d | Thomas Thrainer | """
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302 | 89ff748d | Thomas Thrainer | try:
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303 | 89ff748d | Thomas Thrainer | helper = utils.ReadFile(filename).splitlines()[0]
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304 | 89ff748d | Thomas Thrainer | except EnvironmentError, err: |
305 | 89ff748d | Thomas Thrainer | if err.errno == errno.ENOENT:
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306 | 89ff748d | Thomas Thrainer | base.ThrowError("The file %s cannot be opened, check if the module"
|
307 | 89ff748d | Thomas Thrainer | " is loaded (%s)", filename, str(err)) |
308 | 89ff748d | Thomas Thrainer | else:
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309 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't read DRBD helper file %s: %s",
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310 | 89ff748d | Thomas Thrainer | filename, str(err))
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311 | 89ff748d | Thomas Thrainer | if not helper: |
312 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't read any data from %s", filename)
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313 | 89ff748d | Thomas Thrainer | return helper
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314 | 89ff748d | Thomas Thrainer | |
315 | 89ff748d | Thomas Thrainer | @staticmethod
|
316 | 89ff748d | Thomas Thrainer | def _DevPath(minor): |
317 | 89ff748d | Thomas Thrainer | """Return the path to a drbd device for a given minor.
|
318 | 89ff748d | Thomas Thrainer |
|
319 | 89ff748d | Thomas Thrainer | """
|
320 | 89ff748d | Thomas Thrainer | return "/dev/drbd%d" % minor |
321 | 89ff748d | Thomas Thrainer | |
322 | 89ff748d | Thomas Thrainer | @classmethod
|
323 | 89ff748d | Thomas Thrainer | def GetUsedDevs(cls): |
324 | 89ff748d | Thomas Thrainer | """Compute the list of used DRBD devices.
|
325 | 89ff748d | Thomas Thrainer |
|
326 | 89ff748d | Thomas Thrainer | """
|
327 | 89ff748d | Thomas Thrainer | data = cls._GetProcData() |
328 | 89ff748d | Thomas Thrainer | |
329 | 89ff748d | Thomas Thrainer | used_devs = {} |
330 | 89ff748d | Thomas Thrainer | for line in data: |
331 | 89ff748d | Thomas Thrainer | match = cls._VALID_LINE_RE.match(line) |
332 | 89ff748d | Thomas Thrainer | if not match: |
333 | 89ff748d | Thomas Thrainer | continue
|
334 | 89ff748d | Thomas Thrainer | minor = int(match.group(1)) |
335 | 89ff748d | Thomas Thrainer | state = match.group(2)
|
336 | 89ff748d | Thomas Thrainer | if state == cls._ST_UNCONFIGURED:
|
337 | 89ff748d | Thomas Thrainer | continue
|
338 | 89ff748d | Thomas Thrainer | used_devs[minor] = state, line |
339 | 89ff748d | Thomas Thrainer | |
340 | 89ff748d | Thomas Thrainer | return used_devs
|
341 | 89ff748d | Thomas Thrainer | |
342 | 89ff748d | Thomas Thrainer | def _SetFromMinor(self, minor): |
343 | 89ff748d | Thomas Thrainer | """Set our parameters based on the given minor.
|
344 | 89ff748d | Thomas Thrainer |
|
345 | 89ff748d | Thomas Thrainer | This sets our minor variable and our dev_path.
|
346 | 89ff748d | Thomas Thrainer |
|
347 | 89ff748d | Thomas Thrainer | """
|
348 | 89ff748d | Thomas Thrainer | if minor is None: |
349 | 89ff748d | Thomas Thrainer | self.minor = self.dev_path = None |
350 | 89ff748d | Thomas Thrainer | self.attached = False |
351 | 89ff748d | Thomas Thrainer | else:
|
352 | 89ff748d | Thomas Thrainer | self.minor = minor
|
353 | 89ff748d | Thomas Thrainer | self.dev_path = self._DevPath(minor) |
354 | 89ff748d | Thomas Thrainer | self.attached = True |
355 | 89ff748d | Thomas Thrainer | |
356 | 89ff748d | Thomas Thrainer | @staticmethod
|
357 | 89ff748d | Thomas Thrainer | def _CheckMetaSize(meta_device): |
358 | 89ff748d | Thomas Thrainer | """Check if the given meta device looks like a valid one.
|
359 | 89ff748d | Thomas Thrainer |
|
360 | 89ff748d | Thomas Thrainer | This currently only checks the size, which must be around
|
361 | 89ff748d | Thomas Thrainer | 128MiB.
|
362 | 89ff748d | Thomas Thrainer |
|
363 | 89ff748d | Thomas Thrainer | """
|
364 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["blockdev", "--getsize", meta_device]) |
365 | 89ff748d | Thomas Thrainer | if result.failed:
|
366 | 89ff748d | Thomas Thrainer | base.ThrowError("Failed to get device size: %s - %s",
|
367 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
368 | 89ff748d | Thomas Thrainer | try:
|
369 | 89ff748d | Thomas Thrainer | sectors = int(result.stdout)
|
370 | 89ff748d | Thomas Thrainer | except (TypeError, ValueError): |
371 | 89ff748d | Thomas Thrainer | base.ThrowError("Invalid output from blockdev: '%s'", result.stdout)
|
372 | 89ff748d | Thomas Thrainer | num_bytes = sectors * 512
|
373 | 89ff748d | Thomas Thrainer | if num_bytes < 128 * 1024 * 1024: # less than 128MiB |
374 | 89ff748d | Thomas Thrainer | base.ThrowError("Meta device too small (%.2fMib)",
|
375 | 89ff748d | Thomas Thrainer | (num_bytes / 1024 / 1024)) |
376 | 89ff748d | Thomas Thrainer | # the maximum *valid* size of the meta device when living on top
|
377 | 89ff748d | Thomas Thrainer | # of LVM is hard to compute: it depends on the number of stripes
|
378 | 89ff748d | Thomas Thrainer | # and the PE size; e.g. a 2-stripe, 64MB PE will result in a 128MB
|
379 | 89ff748d | Thomas Thrainer | # (normal size), but an eight-stripe 128MB PE will result in a 1GB
|
380 | 89ff748d | Thomas Thrainer | # size meta device; as such, we restrict it to 1GB (a little bit
|
381 | 89ff748d | Thomas Thrainer | # too generous, but making assumptions about PE size is hard)
|
382 | 89ff748d | Thomas Thrainer | if num_bytes > 1024 * 1024 * 1024: |
383 | 89ff748d | Thomas Thrainer | base.ThrowError("Meta device too big (%.2fMiB)",
|
384 | 89ff748d | Thomas Thrainer | (num_bytes / 1024 / 1024)) |
385 | 89ff748d | Thomas Thrainer | |
386 | 89ff748d | Thomas Thrainer | @classmethod
|
387 | 89ff748d | Thomas Thrainer | def _InitMeta(cls, minor, dev_path): |
388 | 89ff748d | Thomas Thrainer | """Initialize a meta device.
|
389 | 89ff748d | Thomas Thrainer |
|
390 | 89ff748d | Thomas Thrainer | This will not work if the given minor is in use.
|
391 | 89ff748d | Thomas Thrainer |
|
392 | 89ff748d | Thomas Thrainer | """
|
393 | 89ff748d | Thomas Thrainer | # Zero the metadata first, in order to make sure drbdmeta doesn't
|
394 | 89ff748d | Thomas Thrainer | # try to auto-detect existing filesystems or similar (see
|
395 | 89ff748d | Thomas Thrainer | # http://code.google.com/p/ganeti/issues/detail?id=182); we only
|
396 | 89ff748d | Thomas Thrainer | # care about the first 128MB of data in the device, even though it
|
397 | 89ff748d | Thomas Thrainer | # can be bigger
|
398 | 89ff748d | Thomas Thrainer | result = utils.RunCmd([constants.DD_CMD, |
399 | 89ff748d | Thomas Thrainer | "if=/dev/zero", "of=%s" % dev_path, |
400 | 89ff748d | Thomas Thrainer | "bs=1048576", "count=128", "oflag=direct"]) |
401 | 89ff748d | Thomas Thrainer | if result.failed:
|
402 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't wipe the meta device: %s", result.output)
|
403 | 89ff748d | Thomas Thrainer | |
404 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdmeta", "--force", cls._DevPath(minor), |
405 | 89ff748d | Thomas Thrainer | "v08", dev_path, "0", "create-md"]) |
406 | 89ff748d | Thomas Thrainer | if result.failed:
|
407 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't initialize meta device: %s", result.output)
|
408 | 89ff748d | Thomas Thrainer | |
409 | 89ff748d | Thomas Thrainer | @classmethod
|
410 | 89ff748d | Thomas Thrainer | def _FindUnusedMinor(cls): |
411 | 89ff748d | Thomas Thrainer | """Find an unused DRBD device.
|
412 | 89ff748d | Thomas Thrainer |
|
413 | 89ff748d | Thomas Thrainer | This is specific to 8.x as the minors are allocated dynamically,
|
414 | 89ff748d | Thomas Thrainer | so non-existing numbers up to a max minor count are actually free.
|
415 | 89ff748d | Thomas Thrainer |
|
416 | 89ff748d | Thomas Thrainer | """
|
417 | 89ff748d | Thomas Thrainer | data = cls._GetProcData() |
418 | 89ff748d | Thomas Thrainer | |
419 | 89ff748d | Thomas Thrainer | highest = None
|
420 | 89ff748d | Thomas Thrainer | for line in data: |
421 | 89ff748d | Thomas Thrainer | match = cls._UNUSED_LINE_RE.match(line) |
422 | 89ff748d | Thomas Thrainer | if match:
|
423 | 89ff748d | Thomas Thrainer | return int(match.group(1)) |
424 | 89ff748d | Thomas Thrainer | match = cls._VALID_LINE_RE.match(line) |
425 | 89ff748d | Thomas Thrainer | if match:
|
426 | 89ff748d | Thomas Thrainer | minor = int(match.group(1)) |
427 | 89ff748d | Thomas Thrainer | highest = max(highest, minor)
|
428 | 89ff748d | Thomas Thrainer | if highest is None: # there are no minors in use at all |
429 | 89ff748d | Thomas Thrainer | return 0 |
430 | 89ff748d | Thomas Thrainer | if highest >= cls._MAX_MINORS:
|
431 | 89ff748d | Thomas Thrainer | logging.error("Error: no free drbd minors!")
|
432 | 89ff748d | Thomas Thrainer | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
433 | 89ff748d | Thomas Thrainer | return highest + 1 |
434 | 89ff748d | Thomas Thrainer | |
435 | 89ff748d | Thomas Thrainer | @classmethod
|
436 | 89ff748d | Thomas Thrainer | def _GetShowParser(cls): |
437 | 89ff748d | Thomas Thrainer | """Return a parser for `drbd show` output.
|
438 | 89ff748d | Thomas Thrainer |
|
439 | 89ff748d | Thomas Thrainer | This will either create or return an already-created parser for the
|
440 | 89ff748d | Thomas Thrainer | output of the command `drbd show`.
|
441 | 89ff748d | Thomas Thrainer |
|
442 | 89ff748d | Thomas Thrainer | """
|
443 | 89ff748d | Thomas Thrainer | if cls._PARSE_SHOW is not None: |
444 | 89ff748d | Thomas Thrainer | return cls._PARSE_SHOW
|
445 | 89ff748d | Thomas Thrainer | |
446 | 89ff748d | Thomas Thrainer | # pyparsing setup
|
447 | 89ff748d | Thomas Thrainer | lbrace = pyp.Literal("{").suppress()
|
448 | 89ff748d | Thomas Thrainer | rbrace = pyp.Literal("}").suppress()
|
449 | 89ff748d | Thomas Thrainer | lbracket = pyp.Literal("[").suppress()
|
450 | 89ff748d | Thomas Thrainer | rbracket = pyp.Literal("]").suppress()
|
451 | 89ff748d | Thomas Thrainer | semi = pyp.Literal(";").suppress()
|
452 | 89ff748d | Thomas Thrainer | colon = pyp.Literal(":").suppress()
|
453 | 89ff748d | Thomas Thrainer | # this also converts the value to an int
|
454 | 89ff748d | Thomas Thrainer | number = pyp.Word(pyp.nums).setParseAction(lambda s, l, t: int(t[0])) |
455 | 89ff748d | Thomas Thrainer | |
456 | 89ff748d | Thomas Thrainer | comment = pyp.Literal("#") + pyp.Optional(pyp.restOfLine)
|
457 | 89ff748d | Thomas Thrainer | defa = pyp.Literal("_is_default").suppress()
|
458 | 89ff748d | Thomas Thrainer | dbl_quote = pyp.Literal('"').suppress()
|
459 | 89ff748d | Thomas Thrainer | |
460 | 89ff748d | Thomas Thrainer | keyword = pyp.Word(pyp.alphanums + "-")
|
461 | 89ff748d | Thomas Thrainer | |
462 | 89ff748d | Thomas Thrainer | # value types
|
463 | 89ff748d | Thomas Thrainer | value = pyp.Word(pyp.alphanums + "_-/.:")
|
464 | 89ff748d | Thomas Thrainer | quoted = dbl_quote + pyp.CharsNotIn('"') + dbl_quote
|
465 | 89ff748d | Thomas Thrainer | ipv4_addr = (pyp.Optional(pyp.Literal("ipv4")).suppress() +
|
466 | 89ff748d | Thomas Thrainer | pyp.Word(pyp.nums + ".") + colon + number)
|
467 | 89ff748d | Thomas Thrainer | ipv6_addr = (pyp.Optional(pyp.Literal("ipv6")).suppress() +
|
468 | 89ff748d | Thomas Thrainer | pyp.Optional(lbracket) + pyp.Word(pyp.hexnums + ":") +
|
469 | 89ff748d | Thomas Thrainer | pyp.Optional(rbracket) + colon + number) |
470 | 89ff748d | Thomas Thrainer | # meta device, extended syntax
|
471 | 89ff748d | Thomas Thrainer | meta_value = ((value ^ quoted) + lbracket + number + rbracket) |
472 | 89ff748d | Thomas Thrainer | # device name, extended syntax
|
473 | 89ff748d | Thomas Thrainer | device_value = pyp.Literal("minor").suppress() + number
|
474 | 89ff748d | Thomas Thrainer | |
475 | 89ff748d | Thomas Thrainer | # a statement
|
476 | 89ff748d | Thomas Thrainer | stmt = (~rbrace + keyword + ~lbrace + |
477 | 89ff748d | Thomas Thrainer | pyp.Optional(ipv4_addr ^ ipv6_addr ^ value ^ quoted ^ meta_value ^ |
478 | 89ff748d | Thomas Thrainer | device_value) + |
479 | 89ff748d | Thomas Thrainer | pyp.Optional(defa) + semi + |
480 | 89ff748d | Thomas Thrainer | pyp.Optional(pyp.restOfLine).suppress()) |
481 | 89ff748d | Thomas Thrainer | |
482 | 89ff748d | Thomas Thrainer | # an entire section
|
483 | 89ff748d | Thomas Thrainer | section_name = pyp.Word(pyp.alphas + "_")
|
484 | 89ff748d | Thomas Thrainer | section = section_name + lbrace + pyp.ZeroOrMore(pyp.Group(stmt)) + rbrace |
485 | 89ff748d | Thomas Thrainer | |
486 | 89ff748d | Thomas Thrainer | bnf = pyp.ZeroOrMore(pyp.Group(section ^ stmt)) |
487 | 89ff748d | Thomas Thrainer | bnf.ignore(comment) |
488 | 89ff748d | Thomas Thrainer | |
489 | 89ff748d | Thomas Thrainer | cls._PARSE_SHOW = bnf |
490 | 89ff748d | Thomas Thrainer | |
491 | 89ff748d | Thomas Thrainer | return bnf
|
492 | 89ff748d | Thomas Thrainer | |
493 | 89ff748d | Thomas Thrainer | @classmethod
|
494 | 89ff748d | Thomas Thrainer | def _GetShowData(cls, minor): |
495 | 89ff748d | Thomas Thrainer | """Return the `drbdsetup show` data for a minor.
|
496 | 89ff748d | Thomas Thrainer |
|
497 | 89ff748d | Thomas Thrainer | """
|
498 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
499 | 89ff748d | Thomas Thrainer | if result.failed:
|
500 | 89ff748d | Thomas Thrainer | logging.error("Can't display the drbd config: %s - %s",
|
501 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
502 | 89ff748d | Thomas Thrainer | return None |
503 | 89ff748d | Thomas Thrainer | return result.stdout
|
504 | 89ff748d | Thomas Thrainer | |
505 | 89ff748d | Thomas Thrainer | @classmethod
|
506 | 89ff748d | Thomas Thrainer | def _GetDevInfo(cls, out): |
507 | 89ff748d | Thomas Thrainer | """Parse details about a given DRBD minor.
|
508 | 89ff748d | Thomas Thrainer |
|
509 | 89ff748d | Thomas Thrainer | This return, if available, the local backing device (as a path)
|
510 | 89ff748d | Thomas Thrainer | and the local and remote (ip, port) information from a string
|
511 | 89ff748d | Thomas Thrainer | containing the output of the `drbdsetup show` command as returned
|
512 | 89ff748d | Thomas Thrainer | by _GetShowData.
|
513 | 89ff748d | Thomas Thrainer |
|
514 | 89ff748d | Thomas Thrainer | """
|
515 | 89ff748d | Thomas Thrainer | data = {} |
516 | 89ff748d | Thomas Thrainer | if not out: |
517 | 89ff748d | Thomas Thrainer | return data
|
518 | 89ff748d | Thomas Thrainer | |
519 | 89ff748d | Thomas Thrainer | bnf = cls._GetShowParser() |
520 | 89ff748d | Thomas Thrainer | # run pyparse
|
521 | 89ff748d | Thomas Thrainer | |
522 | 89ff748d | Thomas Thrainer | try:
|
523 | 89ff748d | Thomas Thrainer | results = bnf.parseString(out) |
524 | 89ff748d | Thomas Thrainer | except pyp.ParseException, err:
|
525 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't parse drbdsetup show output: %s", str(err)) |
526 | 89ff748d | Thomas Thrainer | |
527 | 89ff748d | Thomas Thrainer | # and massage the results into our desired format
|
528 | 89ff748d | Thomas Thrainer | for section in results: |
529 | 89ff748d | Thomas Thrainer | sname = section[0]
|
530 | 89ff748d | Thomas Thrainer | if sname == "_this_host": |
531 | 89ff748d | Thomas Thrainer | for lst in section[1:]: |
532 | 89ff748d | Thomas Thrainer | if lst[0] == "disk": |
533 | 89ff748d | Thomas Thrainer | data["local_dev"] = lst[1] |
534 | 89ff748d | Thomas Thrainer | elif lst[0] == "meta-disk": |
535 | 89ff748d | Thomas Thrainer | data["meta_dev"] = lst[1] |
536 | 89ff748d | Thomas Thrainer | data["meta_index"] = lst[2] |
537 | 89ff748d | Thomas Thrainer | elif lst[0] == "address": |
538 | 89ff748d | Thomas Thrainer | data["local_addr"] = tuple(lst[1:]) |
539 | 89ff748d | Thomas Thrainer | elif sname == "_remote_host": |
540 | 89ff748d | Thomas Thrainer | for lst in section[1:]: |
541 | 89ff748d | Thomas Thrainer | if lst[0] == "address": |
542 | 89ff748d | Thomas Thrainer | data["remote_addr"] = tuple(lst[1:]) |
543 | 89ff748d | Thomas Thrainer | return data
|
544 | 89ff748d | Thomas Thrainer | |
545 | 89ff748d | Thomas Thrainer | def _MatchesLocal(self, info): |
546 | 89ff748d | Thomas Thrainer | """Test if our local config matches with an existing device.
|
547 | 89ff748d | Thomas Thrainer |
|
548 | 89ff748d | Thomas Thrainer | The parameter should be as returned from `_GetDevInfo()`. This
|
549 | 89ff748d | Thomas Thrainer | method tests if our local backing device is the same as the one in
|
550 | 89ff748d | Thomas Thrainer | the info parameter, in effect testing if we look like the given
|
551 | 89ff748d | Thomas Thrainer | device.
|
552 | 89ff748d | Thomas Thrainer |
|
553 | 89ff748d | Thomas Thrainer | """
|
554 | 89ff748d | Thomas Thrainer | if self._children: |
555 | 89ff748d | Thomas Thrainer | backend, meta = self._children
|
556 | 89ff748d | Thomas Thrainer | else:
|
557 | 89ff748d | Thomas Thrainer | backend = meta = None
|
558 | 89ff748d | Thomas Thrainer | |
559 | 89ff748d | Thomas Thrainer | if backend is not None: |
560 | 89ff748d | Thomas Thrainer | retval = ("local_dev" in info and info["local_dev"] == backend.dev_path) |
561 | 89ff748d | Thomas Thrainer | else:
|
562 | 89ff748d | Thomas Thrainer | retval = ("local_dev" not in info) |
563 | 89ff748d | Thomas Thrainer | |
564 | 89ff748d | Thomas Thrainer | if meta is not None: |
565 | 89ff748d | Thomas Thrainer | retval = retval and ("meta_dev" in info and |
566 | 89ff748d | Thomas Thrainer | info["meta_dev"] == meta.dev_path)
|
567 | 89ff748d | Thomas Thrainer | retval = retval and ("meta_index" in info and |
568 | 89ff748d | Thomas Thrainer | info["meta_index"] == 0) |
569 | 89ff748d | Thomas Thrainer | else:
|
570 | 89ff748d | Thomas Thrainer | retval = retval and ("meta_dev" not in info and |
571 | 89ff748d | Thomas Thrainer | "meta_index" not in info) |
572 | 89ff748d | Thomas Thrainer | return retval
|
573 | 89ff748d | Thomas Thrainer | |
574 | 89ff748d | Thomas Thrainer | def _MatchesNet(self, info): |
575 | 89ff748d | Thomas Thrainer | """Test if our network config matches with an existing device.
|
576 | 89ff748d | Thomas Thrainer |
|
577 | 89ff748d | Thomas Thrainer | The parameter should be as returned from `_GetDevInfo()`. This
|
578 | 89ff748d | Thomas Thrainer | method tests if our network configuration is the same as the one
|
579 | 89ff748d | Thomas Thrainer | in the info parameter, in effect testing if we look like the given
|
580 | 89ff748d | Thomas Thrainer | device.
|
581 | 89ff748d | Thomas Thrainer |
|
582 | 89ff748d | Thomas Thrainer | """
|
583 | 89ff748d | Thomas Thrainer | if (((self._lhost is None and not ("local_addr" in info)) and |
584 | 89ff748d | Thomas Thrainer | (self._rhost is None and not ("remote_addr" in info)))): |
585 | 89ff748d | Thomas Thrainer | return True |
586 | 89ff748d | Thomas Thrainer | |
587 | 89ff748d | Thomas Thrainer | if self._lhost is None: |
588 | 89ff748d | Thomas Thrainer | return False |
589 | 89ff748d | Thomas Thrainer | |
590 | 89ff748d | Thomas Thrainer | if not ("local_addr" in info and |
591 | 89ff748d | Thomas Thrainer | "remote_addr" in info): |
592 | 89ff748d | Thomas Thrainer | return False |
593 | 89ff748d | Thomas Thrainer | |
594 | 89ff748d | Thomas Thrainer | retval = (info["local_addr"] == (self._lhost, self._lport)) |
595 | 89ff748d | Thomas Thrainer | retval = (retval and
|
596 | 89ff748d | Thomas Thrainer | info["remote_addr"] == (self._rhost, self._rport)) |
597 | 89ff748d | Thomas Thrainer | return retval
|
598 | 89ff748d | Thomas Thrainer | |
599 | 89ff748d | Thomas Thrainer | def _AssembleLocal(self, minor, backend, meta, size): |
600 | 89ff748d | Thomas Thrainer | """Configure the local part of a DRBD device.
|
601 | 89ff748d | Thomas Thrainer |
|
602 | 89ff748d | Thomas Thrainer | """
|
603 | 89ff748d | Thomas Thrainer | args = ["drbdsetup", self._DevPath(minor), "disk", |
604 | 89ff748d | Thomas Thrainer | backend, meta, "0",
|
605 | 89ff748d | Thomas Thrainer | "-e", "detach", |
606 | 89ff748d | Thomas Thrainer | "--create-device"]
|
607 | 89ff748d | Thomas Thrainer | if size:
|
608 | 89ff748d | Thomas Thrainer | args.extend(["-d", "%sm" % size]) |
609 | 89ff748d | Thomas Thrainer | |
610 | 89ff748d | Thomas Thrainer | version = self._GetVersion(self._GetProcData()) |
611 | 89ff748d | Thomas Thrainer | vmaj = version["k_major"]
|
612 | 89ff748d | Thomas Thrainer | vmin = version["k_minor"]
|
613 | 89ff748d | Thomas Thrainer | vrel = version["k_point"]
|
614 | 89ff748d | Thomas Thrainer | |
615 | 89ff748d | Thomas Thrainer | barrier_args = \ |
616 | 89ff748d | Thomas Thrainer | self._ComputeDiskBarrierArgs(vmaj, vmin, vrel,
|
617 | 89ff748d | Thomas Thrainer | self.params[constants.LDP_BARRIERS],
|
618 | 89ff748d | Thomas Thrainer | self.params[constants.LDP_NO_META_FLUSH])
|
619 | 89ff748d | Thomas Thrainer | args.extend(barrier_args) |
620 | 89ff748d | Thomas Thrainer | |
621 | 89ff748d | Thomas Thrainer | if self.params[constants.LDP_DISK_CUSTOM]: |
622 | 89ff748d | Thomas Thrainer | args.extend(shlex.split(self.params[constants.LDP_DISK_CUSTOM]))
|
623 | 89ff748d | Thomas Thrainer | |
624 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(args) |
625 | 89ff748d | Thomas Thrainer | if result.failed:
|
626 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't attach local disk: %s",
|
627 | 89ff748d | Thomas Thrainer | minor, result.output) |
628 | 89ff748d | Thomas Thrainer | |
629 | 89ff748d | Thomas Thrainer | @classmethod
|
630 | 89ff748d | Thomas Thrainer | def _ComputeDiskBarrierArgs(cls, vmaj, vmin, vrel, disabled_barriers, |
631 | 89ff748d | Thomas Thrainer | disable_meta_flush): |
632 | 89ff748d | Thomas Thrainer | """Compute the DRBD command line parameters for disk barriers
|
633 | 89ff748d | Thomas Thrainer |
|
634 | 89ff748d | Thomas Thrainer | Returns a list of the disk barrier parameters as requested via the
|
635 | 89ff748d | Thomas Thrainer | disabled_barriers and disable_meta_flush arguments, and according to the
|
636 | 89ff748d | Thomas Thrainer | supported ones in the DRBD version vmaj.vmin.vrel
|
637 | 89ff748d | Thomas Thrainer |
|
638 | 89ff748d | Thomas Thrainer | If the desired option is unsupported, raises errors.BlockDeviceError.
|
639 | 89ff748d | Thomas Thrainer |
|
640 | 89ff748d | Thomas Thrainer | """
|
641 | 89ff748d | Thomas Thrainer | disabled_barriers_set = frozenset(disabled_barriers)
|
642 | 89ff748d | Thomas Thrainer | if not disabled_barriers_set in constants.DRBD_VALID_BARRIER_OPT: |
643 | 89ff748d | Thomas Thrainer | raise errors.BlockDeviceError("%s is not a valid option set for DRBD" |
644 | 89ff748d | Thomas Thrainer | " barriers" % disabled_barriers)
|
645 | 89ff748d | Thomas Thrainer | |
646 | 89ff748d | Thomas Thrainer | args = [] |
647 | 89ff748d | Thomas Thrainer | |
648 | 89ff748d | Thomas Thrainer | # The following code assumes DRBD 8.x, with x < 4 and x != 1 (DRBD 8.1.x
|
649 | 89ff748d | Thomas Thrainer | # does not exist)
|
650 | 89ff748d | Thomas Thrainer | if not vmaj == 8 and vmin in (0, 2, 3): |
651 | 89ff748d | Thomas Thrainer | raise errors.BlockDeviceError("Unsupported DRBD version: %d.%d.%d" % |
652 | 89ff748d | Thomas Thrainer | (vmaj, vmin, vrel)) |
653 | 89ff748d | Thomas Thrainer | |
654 | 89ff748d | Thomas Thrainer | def _AppendOrRaise(option, min_version): |
655 | 89ff748d | Thomas Thrainer | """Helper for DRBD options"""
|
656 | 89ff748d | Thomas Thrainer | if min_version is not None and vrel >= min_version: |
657 | 89ff748d | Thomas Thrainer | args.append(option) |
658 | 89ff748d | Thomas Thrainer | else:
|
659 | 89ff748d | Thomas Thrainer | raise errors.BlockDeviceError("Could not use the option %s as the" |
660 | 89ff748d | Thomas Thrainer | " DRBD version %d.%d.%d does not support"
|
661 | 89ff748d | Thomas Thrainer | " it." % (option, vmaj, vmin, vrel))
|
662 | 89ff748d | Thomas Thrainer | |
663 | 89ff748d | Thomas Thrainer | # the minimum version for each feature is encoded via pairs of (minor
|
664 | 89ff748d | Thomas Thrainer | # version -> x) where x is version in which support for the option was
|
665 | 89ff748d | Thomas Thrainer | # introduced.
|
666 | 89ff748d | Thomas Thrainer | meta_flush_supported = disk_flush_supported = { |
667 | 89ff748d | Thomas Thrainer | 0: 12, |
668 | 89ff748d | Thomas Thrainer | 2: 7, |
669 | 89ff748d | Thomas Thrainer | 3: 0, |
670 | 89ff748d | Thomas Thrainer | } |
671 | 89ff748d | Thomas Thrainer | |
672 | 89ff748d | Thomas Thrainer | disk_drain_supported = { |
673 | 89ff748d | Thomas Thrainer | 2: 7, |
674 | 89ff748d | Thomas Thrainer | 3: 0, |
675 | 89ff748d | Thomas Thrainer | } |
676 | 89ff748d | Thomas Thrainer | |
677 | 89ff748d | Thomas Thrainer | disk_barriers_supported = { |
678 | 89ff748d | Thomas Thrainer | 3: 0, |
679 | 89ff748d | Thomas Thrainer | } |
680 | 89ff748d | Thomas Thrainer | |
681 | 89ff748d | Thomas Thrainer | # meta flushes
|
682 | 89ff748d | Thomas Thrainer | if disable_meta_flush:
|
683 | 89ff748d | Thomas Thrainer | _AppendOrRaise(cls._DISABLE_META_FLUSH_OPTION, |
684 | 89ff748d | Thomas Thrainer | meta_flush_supported.get(vmin, None))
|
685 | 89ff748d | Thomas Thrainer | |
686 | 89ff748d | Thomas Thrainer | # disk flushes
|
687 | 89ff748d | Thomas Thrainer | if constants.DRBD_B_DISK_FLUSH in disabled_barriers_set: |
688 | 89ff748d | Thomas Thrainer | _AppendOrRaise(cls._DISABLE_FLUSH_OPTION, |
689 | 89ff748d | Thomas Thrainer | disk_flush_supported.get(vmin, None))
|
690 | 89ff748d | Thomas Thrainer | |
691 | 89ff748d | Thomas Thrainer | # disk drain
|
692 | 89ff748d | Thomas Thrainer | if constants.DRBD_B_DISK_DRAIN in disabled_barriers_set: |
693 | 89ff748d | Thomas Thrainer | _AppendOrRaise(cls._DISABLE_DRAIN_OPTION, |
694 | 89ff748d | Thomas Thrainer | disk_drain_supported.get(vmin, None))
|
695 | 89ff748d | Thomas Thrainer | |
696 | 89ff748d | Thomas Thrainer | # disk barriers
|
697 | 89ff748d | Thomas Thrainer | if constants.DRBD_B_DISK_BARRIERS in disabled_barriers_set: |
698 | 89ff748d | Thomas Thrainer | _AppendOrRaise(cls._DISABLE_DISK_OPTION, |
699 | 89ff748d | Thomas Thrainer | disk_barriers_supported.get(vmin, None))
|
700 | 89ff748d | Thomas Thrainer | |
701 | 89ff748d | Thomas Thrainer | return args
|
702 | 89ff748d | Thomas Thrainer | |
703 | 89ff748d | Thomas Thrainer | def _AssembleNet(self, minor, net_info, protocol, |
704 | 89ff748d | Thomas Thrainer | dual_pri=False, hmac=None, secret=None): |
705 | 89ff748d | Thomas Thrainer | """Configure the network part of the device.
|
706 | 89ff748d | Thomas Thrainer |
|
707 | 89ff748d | Thomas Thrainer | """
|
708 | 89ff748d | Thomas Thrainer | lhost, lport, rhost, rport = net_info |
709 | 89ff748d | Thomas Thrainer | if None in net_info: |
710 | 89ff748d | Thomas Thrainer | # we don't want network connection and actually want to make
|
711 | 89ff748d | Thomas Thrainer | # sure its shutdown
|
712 | 89ff748d | Thomas Thrainer | self._ShutdownNet(minor)
|
713 | 89ff748d | Thomas Thrainer | return
|
714 | 89ff748d | Thomas Thrainer | |
715 | 89ff748d | Thomas Thrainer | # Workaround for a race condition. When DRBD is doing its dance to
|
716 | 89ff748d | Thomas Thrainer | # establish a connection with its peer, it also sends the
|
717 | 89ff748d | Thomas Thrainer | # synchronization speed over the wire. In some cases setting the
|
718 | 89ff748d | Thomas Thrainer | # sync speed only after setting up both sides can race with DRBD
|
719 | 89ff748d | Thomas Thrainer | # connecting, hence we set it here before telling DRBD anything
|
720 | 89ff748d | Thomas Thrainer | # about its peer.
|
721 | 89ff748d | Thomas Thrainer | sync_errors = self._SetMinorSyncParams(minor, self.params) |
722 | 89ff748d | Thomas Thrainer | if sync_errors:
|
723 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't set the synchronization parameters: %s" %
|
724 | 89ff748d | Thomas Thrainer | (minor, utils.CommaJoin(sync_errors))) |
725 | 89ff748d | Thomas Thrainer | |
726 | 89ff748d | Thomas Thrainer | if netutils.IP6Address.IsValid(lhost):
|
727 | 89ff748d | Thomas Thrainer | if not netutils.IP6Address.IsValid(rhost): |
728 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't connect ip %s to ip %s" %
|
729 | 89ff748d | Thomas Thrainer | (minor, lhost, rhost)) |
730 | 89ff748d | Thomas Thrainer | family = "ipv6"
|
731 | 89ff748d | Thomas Thrainer | elif netutils.IP4Address.IsValid(lhost):
|
732 | 89ff748d | Thomas Thrainer | if not netutils.IP4Address.IsValid(rhost): |
733 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't connect ip %s to ip %s" %
|
734 | 89ff748d | Thomas Thrainer | (minor, lhost, rhost)) |
735 | 89ff748d | Thomas Thrainer | family = "ipv4"
|
736 | 89ff748d | Thomas Thrainer | else:
|
737 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: Invalid ip %s" % (minor, lhost))
|
738 | 89ff748d | Thomas Thrainer | |
739 | 89ff748d | Thomas Thrainer | args = ["drbdsetup", self._DevPath(minor), "net", |
740 | 89ff748d | Thomas Thrainer | "%s:%s:%s" % (family, lhost, lport),
|
741 | 89ff748d | Thomas Thrainer | "%s:%s:%s" % (family, rhost, rport), protocol,
|
742 | 89ff748d | Thomas Thrainer | "-A", "discard-zero-changes", |
743 | 89ff748d | Thomas Thrainer | "-B", "consensus", |
744 | 89ff748d | Thomas Thrainer | "--create-device",
|
745 | 89ff748d | Thomas Thrainer | ] |
746 | 89ff748d | Thomas Thrainer | if dual_pri:
|
747 | 89ff748d | Thomas Thrainer | args.append("-m")
|
748 | 89ff748d | Thomas Thrainer | if hmac and secret: |
749 | 89ff748d | Thomas Thrainer | args.extend(["-a", hmac, "-x", secret]) |
750 | 89ff748d | Thomas Thrainer | |
751 | 89ff748d | Thomas Thrainer | if self.params[constants.LDP_NET_CUSTOM]: |
752 | 89ff748d | Thomas Thrainer | args.extend(shlex.split(self.params[constants.LDP_NET_CUSTOM]))
|
753 | 89ff748d | Thomas Thrainer | |
754 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(args) |
755 | 89ff748d | Thomas Thrainer | if result.failed:
|
756 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't setup network: %s - %s",
|
757 | 89ff748d | Thomas Thrainer | minor, result.fail_reason, result.output) |
758 | 89ff748d | Thomas Thrainer | |
759 | 89ff748d | Thomas Thrainer | def _CheckNetworkConfig(): |
760 | 89ff748d | Thomas Thrainer | info = self._GetDevInfo(self._GetShowData(minor)) |
761 | 89ff748d | Thomas Thrainer | if not "local_addr" in info or not "remote_addr" in info: |
762 | 89ff748d | Thomas Thrainer | raise utils.RetryAgain()
|
763 | 89ff748d | Thomas Thrainer | |
764 | 89ff748d | Thomas Thrainer | if (info["local_addr"] != (lhost, lport) or |
765 | 89ff748d | Thomas Thrainer | info["remote_addr"] != (rhost, rport)):
|
766 | 89ff748d | Thomas Thrainer | raise utils.RetryAgain()
|
767 | 89ff748d | Thomas Thrainer | |
768 | 89ff748d | Thomas Thrainer | try:
|
769 | 89ff748d | Thomas Thrainer | utils.Retry(_CheckNetworkConfig, 1.0, 10.0) |
770 | 89ff748d | Thomas Thrainer | except utils.RetryTimeout:
|
771 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: timeout while configuring network", minor)
|
772 | 89ff748d | Thomas Thrainer | |
773 | 89ff748d | Thomas Thrainer | def AddChildren(self, devices): |
774 | 89ff748d | Thomas Thrainer | """Add a disk to the DRBD device.
|
775 | 89ff748d | Thomas Thrainer |
|
776 | 89ff748d | Thomas Thrainer | """
|
777 | 89ff748d | Thomas Thrainer | if self.minor is None: |
778 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't attach to dbrd8 during AddChildren",
|
779 | 89ff748d | Thomas Thrainer | self._aminor)
|
780 | 89ff748d | Thomas Thrainer | if len(devices) != 2: |
781 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: need two devices for AddChildren", self.minor) |
782 | 89ff748d | Thomas Thrainer | info = self._GetDevInfo(self._GetShowData(self.minor)) |
783 | 89ff748d | Thomas Thrainer | if "local_dev" in info: |
784 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: already attached to a local disk", self.minor) |
785 | 89ff748d | Thomas Thrainer | backend, meta = devices |
786 | 89ff748d | Thomas Thrainer | if backend.dev_path is None or meta.dev_path is None: |
787 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: children not ready during AddChildren",
|
788 | 89ff748d | Thomas Thrainer | self.minor)
|
789 | 89ff748d | Thomas Thrainer | backend.Open() |
790 | 89ff748d | Thomas Thrainer | meta.Open() |
791 | 89ff748d | Thomas Thrainer | self._CheckMetaSize(meta.dev_path)
|
792 | 89ff748d | Thomas Thrainer | self._InitMeta(self._FindUnusedMinor(), meta.dev_path) |
793 | 89ff748d | Thomas Thrainer | |
794 | 89ff748d | Thomas Thrainer | self._AssembleLocal(self.minor, backend.dev_path, meta.dev_path, self.size) |
795 | 89ff748d | Thomas Thrainer | self._children = devices
|
796 | 89ff748d | Thomas Thrainer | |
797 | 89ff748d | Thomas Thrainer | def RemoveChildren(self, devices): |
798 | 89ff748d | Thomas Thrainer | """Detach the drbd device from local storage.
|
799 | 89ff748d | Thomas Thrainer |
|
800 | 89ff748d | Thomas Thrainer | """
|
801 | 89ff748d | Thomas Thrainer | if self.minor is None: |
802 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't attach to drbd8 during RemoveChildren",
|
803 | 89ff748d | Thomas Thrainer | self._aminor)
|
804 | 89ff748d | Thomas Thrainer | # early return if we don't actually have backing storage
|
805 | 89ff748d | Thomas Thrainer | info = self._GetDevInfo(self._GetShowData(self.minor)) |
806 | 89ff748d | Thomas Thrainer | if "local_dev" not in info: |
807 | 89ff748d | Thomas Thrainer | return
|
808 | 89ff748d | Thomas Thrainer | if len(self._children) != 2: |
809 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: we don't have two children: %s", self.minor, |
810 | 89ff748d | Thomas Thrainer | self._children)
|
811 | 89ff748d | Thomas Thrainer | if self._children.count(None) == 2: # we don't actually have children :) |
812 | 89ff748d | Thomas Thrainer | logging.warning("drbd%d: requested detach while detached", self.minor) |
813 | 89ff748d | Thomas Thrainer | return
|
814 | 89ff748d | Thomas Thrainer | if len(devices) != 2: |
815 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: we need two children in RemoveChildren",
|
816 | 89ff748d | Thomas Thrainer | self.minor)
|
817 | 89ff748d | Thomas Thrainer | for child, dev in zip(self._children, devices): |
818 | 89ff748d | Thomas Thrainer | if dev != child.dev_path:
|
819 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: mismatch in local storage (%s != %s) in"
|
820 | 89ff748d | Thomas Thrainer | " RemoveChildren", self.minor, dev, child.dev_path) |
821 | 89ff748d | Thomas Thrainer | |
822 | 89ff748d | Thomas Thrainer | self._ShutdownLocal(self.minor) |
823 | 89ff748d | Thomas Thrainer | self._children = []
|
824 | 89ff748d | Thomas Thrainer | |
825 | 89ff748d | Thomas Thrainer | @classmethod
|
826 | 89ff748d | Thomas Thrainer | def _SetMinorSyncParams(cls, minor, params): |
827 | 89ff748d | Thomas Thrainer | """Set the parameters of the DRBD syncer.
|
828 | 89ff748d | Thomas Thrainer |
|
829 | 89ff748d | Thomas Thrainer | This is the low-level implementation.
|
830 | 89ff748d | Thomas Thrainer |
|
831 | 89ff748d | Thomas Thrainer | @type minor: int
|
832 | 89ff748d | Thomas Thrainer | @param minor: the drbd minor whose settings we change
|
833 | 89ff748d | Thomas Thrainer | @type params: dict
|
834 | 89ff748d | Thomas Thrainer | @param params: LD level disk parameters related to the synchronization
|
835 | 89ff748d | Thomas Thrainer | @rtype: list
|
836 | 89ff748d | Thomas Thrainer | @return: a list of error messages
|
837 | 89ff748d | Thomas Thrainer |
|
838 | 89ff748d | Thomas Thrainer | """
|
839 | 89ff748d | Thomas Thrainer | |
840 | 89ff748d | Thomas Thrainer | args = ["drbdsetup", cls._DevPath(minor), "syncer"] |
841 | 89ff748d | Thomas Thrainer | if params[constants.LDP_DYNAMIC_RESYNC]:
|
842 | 89ff748d | Thomas Thrainer | version = cls._GetVersion(cls._GetProcData()) |
843 | 89ff748d | Thomas Thrainer | vmin = version["k_minor"]
|
844 | 89ff748d | Thomas Thrainer | vrel = version["k_point"]
|
845 | 89ff748d | Thomas Thrainer | |
846 | 89ff748d | Thomas Thrainer | # By definition we are using 8.x, so just check the rest of the version
|
847 | 89ff748d | Thomas Thrainer | # number
|
848 | 89ff748d | Thomas Thrainer | if vmin != 3 or vrel < 9: |
849 | 89ff748d | Thomas Thrainer | msg = ("The current DRBD version (8.%d.%d) does not support the "
|
850 | 89ff748d | Thomas Thrainer | "dynamic resync speed controller" % (vmin, vrel))
|
851 | 89ff748d | Thomas Thrainer | logging.error(msg) |
852 | 89ff748d | Thomas Thrainer | return [msg]
|
853 | 89ff748d | Thomas Thrainer | |
854 | 89ff748d | Thomas Thrainer | if params[constants.LDP_PLAN_AHEAD] == 0: |
855 | 89ff748d | Thomas Thrainer | msg = ("A value of 0 for c-plan-ahead disables the dynamic sync speed"
|
856 | 89ff748d | Thomas Thrainer | " controller at DRBD level. If you want to disable it, please"
|
857 | 89ff748d | Thomas Thrainer | " set the dynamic-resync disk parameter to False.")
|
858 | 89ff748d | Thomas Thrainer | logging.error(msg) |
859 | 89ff748d | Thomas Thrainer | return [msg]
|
860 | 89ff748d | Thomas Thrainer | |
861 | 89ff748d | Thomas Thrainer | # add the c-* parameters to args
|
862 | 89ff748d | Thomas Thrainer | args.extend(["--c-plan-ahead", params[constants.LDP_PLAN_AHEAD],
|
863 | 89ff748d | Thomas Thrainer | "--c-fill-target", params[constants.LDP_FILL_TARGET],
|
864 | 89ff748d | Thomas Thrainer | "--c-delay-target", params[constants.LDP_DELAY_TARGET],
|
865 | 89ff748d | Thomas Thrainer | "--c-max-rate", params[constants.LDP_MAX_RATE],
|
866 | 89ff748d | Thomas Thrainer | "--c-min-rate", params[constants.LDP_MIN_RATE],
|
867 | 89ff748d | Thomas Thrainer | ]) |
868 | 89ff748d | Thomas Thrainer | |
869 | 89ff748d | Thomas Thrainer | else:
|
870 | 89ff748d | Thomas Thrainer | args.extend(["-r", "%d" % params[constants.LDP_RESYNC_RATE]]) |
871 | 89ff748d | Thomas Thrainer | |
872 | 89ff748d | Thomas Thrainer | args.append("--create-device")
|
873 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(args) |
874 | 89ff748d | Thomas Thrainer | if result.failed:
|
875 | 89ff748d | Thomas Thrainer | msg = ("Can't change syncer rate: %s - %s" %
|
876 | 89ff748d | Thomas Thrainer | (result.fail_reason, result.output)) |
877 | 89ff748d | Thomas Thrainer | logging.error(msg) |
878 | 89ff748d | Thomas Thrainer | return [msg]
|
879 | 89ff748d | Thomas Thrainer | |
880 | 89ff748d | Thomas Thrainer | return []
|
881 | 89ff748d | Thomas Thrainer | |
882 | 89ff748d | Thomas Thrainer | def SetSyncParams(self, params): |
883 | 89ff748d | Thomas Thrainer | """Set the synchronization parameters of the DRBD syncer.
|
884 | 89ff748d | Thomas Thrainer |
|
885 | 89ff748d | Thomas Thrainer | @type params: dict
|
886 | 89ff748d | Thomas Thrainer | @param params: LD level disk parameters related to the synchronization
|
887 | 89ff748d | Thomas Thrainer | @rtype: list
|
888 | 89ff748d | Thomas Thrainer | @return: a list of error messages, emitted both by the current node and by
|
889 | 89ff748d | Thomas Thrainer | children. An empty list means no errors
|
890 | 89ff748d | Thomas Thrainer |
|
891 | 89ff748d | Thomas Thrainer | """
|
892 | 89ff748d | Thomas Thrainer | if self.minor is None: |
893 | 89ff748d | Thomas Thrainer | err = "Not attached during SetSyncParams"
|
894 | 89ff748d | Thomas Thrainer | logging.info(err) |
895 | 89ff748d | Thomas Thrainer | return [err]
|
896 | 89ff748d | Thomas Thrainer | |
897 | 89ff748d | Thomas Thrainer | children_result = super(DRBD8, self).SetSyncParams(params) |
898 | 89ff748d | Thomas Thrainer | children_result.extend(self._SetMinorSyncParams(self.minor, params)) |
899 | 89ff748d | Thomas Thrainer | return children_result
|
900 | 89ff748d | Thomas Thrainer | |
901 | 89ff748d | Thomas Thrainer | def PauseResumeSync(self, pause): |
902 | 89ff748d | Thomas Thrainer | """Pauses or resumes the sync of a DRBD device.
|
903 | 89ff748d | Thomas Thrainer |
|
904 | 89ff748d | Thomas Thrainer | @param pause: Wether to pause or resume
|
905 | 89ff748d | Thomas Thrainer | @return: the success of the operation
|
906 | 89ff748d | Thomas Thrainer |
|
907 | 89ff748d | Thomas Thrainer | """
|
908 | 89ff748d | Thomas Thrainer | if self.minor is None: |
909 | 89ff748d | Thomas Thrainer | logging.info("Not attached during PauseSync")
|
910 | 89ff748d | Thomas Thrainer | return False |
911 | 89ff748d | Thomas Thrainer | |
912 | 89ff748d | Thomas Thrainer | children_result = super(DRBD8, self).PauseResumeSync(pause) |
913 | 89ff748d | Thomas Thrainer | |
914 | 89ff748d | Thomas Thrainer | if pause:
|
915 | 89ff748d | Thomas Thrainer | cmd = "pause-sync"
|
916 | 89ff748d | Thomas Thrainer | else:
|
917 | 89ff748d | Thomas Thrainer | cmd = "resume-sync"
|
918 | 89ff748d | Thomas Thrainer | |
919 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", self.dev_path, cmd]) |
920 | 89ff748d | Thomas Thrainer | if result.failed:
|
921 | 89ff748d | Thomas Thrainer | logging.error("Can't %s: %s - %s", cmd,
|
922 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
923 | 89ff748d | Thomas Thrainer | return not result.failed and children_result |
924 | 89ff748d | Thomas Thrainer | |
925 | 89ff748d | Thomas Thrainer | def GetProcStatus(self): |
926 | 89ff748d | Thomas Thrainer | """Return device data from /proc.
|
927 | 89ff748d | Thomas Thrainer |
|
928 | 89ff748d | Thomas Thrainer | """
|
929 | 89ff748d | Thomas Thrainer | if self.minor is None: |
930 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: GetStats() called while not attached",
|
931 | 89ff748d | Thomas Thrainer | self._aminor)
|
932 | 38396ae2 | Thomas Thrainer | proc_info = self._JoinProcDataPerMinor(self._GetProcData()) |
933 | 89ff748d | Thomas Thrainer | if self.minor not in proc_info: |
934 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't find myself in /proc", self.minor) |
935 | 89ff748d | Thomas Thrainer | return DRBD8Status(proc_info[self.minor]) |
936 | 89ff748d | Thomas Thrainer | |
937 | 89ff748d | Thomas Thrainer | def GetSyncStatus(self): |
938 | 89ff748d | Thomas Thrainer | """Returns the sync status of the device.
|
939 | 89ff748d | Thomas Thrainer |
|
940 | 89ff748d | Thomas Thrainer |
|
941 | 89ff748d | Thomas Thrainer | If sync_percent is None, it means all is ok
|
942 | 89ff748d | Thomas Thrainer | If estimated_time is None, it means we can't estimate
|
943 | 89ff748d | Thomas Thrainer | the time needed, otherwise it's the time left in seconds.
|
944 | 89ff748d | Thomas Thrainer |
|
945 | 89ff748d | Thomas Thrainer |
|
946 | 89ff748d | Thomas Thrainer | We set the is_degraded parameter to True on two conditions:
|
947 | 89ff748d | Thomas Thrainer | network not connected or local disk missing.
|
948 | 89ff748d | Thomas Thrainer |
|
949 | 89ff748d | Thomas Thrainer | We compute the ldisk parameter based on whether we have a local
|
950 | 89ff748d | Thomas Thrainer | disk or not.
|
951 | 89ff748d | Thomas Thrainer |
|
952 | 89ff748d | Thomas Thrainer | @rtype: objects.BlockDevStatus
|
953 | 89ff748d | Thomas Thrainer |
|
954 | 89ff748d | Thomas Thrainer | """
|
955 | 89ff748d | Thomas Thrainer | if self.minor is None and not self.Attach(): |
956 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't Attach() in GetSyncStatus", self._aminor) |
957 | 89ff748d | Thomas Thrainer | |
958 | 89ff748d | Thomas Thrainer | stats = self.GetProcStatus()
|
959 | 89ff748d | Thomas Thrainer | is_degraded = not stats.is_connected or not stats.is_disk_uptodate |
960 | 89ff748d | Thomas Thrainer | |
961 | 89ff748d | Thomas Thrainer | if stats.is_disk_uptodate:
|
962 | 89ff748d | Thomas Thrainer | ldisk_status = constants.LDS_OKAY |
963 | 89ff748d | Thomas Thrainer | elif stats.is_diskless:
|
964 | 89ff748d | Thomas Thrainer | ldisk_status = constants.LDS_FAULTY |
965 | 89ff748d | Thomas Thrainer | else:
|
966 | 89ff748d | Thomas Thrainer | ldisk_status = constants.LDS_UNKNOWN |
967 | 89ff748d | Thomas Thrainer | |
968 | 89ff748d | Thomas Thrainer | return objects.BlockDevStatus(dev_path=self.dev_path, |
969 | 89ff748d | Thomas Thrainer | major=self.major,
|
970 | 89ff748d | Thomas Thrainer | minor=self.minor,
|
971 | 89ff748d | Thomas Thrainer | sync_percent=stats.sync_percent, |
972 | 89ff748d | Thomas Thrainer | estimated_time=stats.est_time, |
973 | 89ff748d | Thomas Thrainer | is_degraded=is_degraded, |
974 | 89ff748d | Thomas Thrainer | ldisk_status=ldisk_status) |
975 | 89ff748d | Thomas Thrainer | |
976 | 89ff748d | Thomas Thrainer | def Open(self, force=False): |
977 | 89ff748d | Thomas Thrainer | """Make the local state primary.
|
978 | 89ff748d | Thomas Thrainer |
|
979 | 89ff748d | Thomas Thrainer | If the 'force' parameter is given, the '-o' option is passed to
|
980 | 89ff748d | Thomas Thrainer | drbdsetup. Since this is a potentially dangerous operation, the
|
981 | 89ff748d | Thomas Thrainer | force flag should be only given after creation, when it actually
|
982 | 89ff748d | Thomas Thrainer | is mandatory.
|
983 | 89ff748d | Thomas Thrainer |
|
984 | 89ff748d | Thomas Thrainer | """
|
985 | 89ff748d | Thomas Thrainer | if self.minor is None and not self.Attach(): |
986 | 89ff748d | Thomas Thrainer | logging.error("DRBD cannot attach to a device during open")
|
987 | 89ff748d | Thomas Thrainer | return False |
988 | 89ff748d | Thomas Thrainer | cmd = ["drbdsetup", self.dev_path, "primary"] |
989 | 89ff748d | Thomas Thrainer | if force:
|
990 | 89ff748d | Thomas Thrainer | cmd.append("-o")
|
991 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(cmd) |
992 | 89ff748d | Thomas Thrainer | if result.failed:
|
993 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't make drbd device primary: %s", self.minor, |
994 | 89ff748d | Thomas Thrainer | result.output) |
995 | 89ff748d | Thomas Thrainer | |
996 | 89ff748d | Thomas Thrainer | def Close(self): |
997 | 89ff748d | Thomas Thrainer | """Make the local state secondary.
|
998 | 89ff748d | Thomas Thrainer |
|
999 | 89ff748d | Thomas Thrainer | This will, of course, fail if the device is in use.
|
1000 | 89ff748d | Thomas Thrainer |
|
1001 | 89ff748d | Thomas Thrainer | """
|
1002 | 89ff748d | Thomas Thrainer | if self.minor is None and not self.Attach(): |
1003 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't Attach() in Close()", self._aminor) |
1004 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
1005 | 89ff748d | Thomas Thrainer | if result.failed:
|
1006 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't switch drbd device to secondary: %s",
|
1007 | 89ff748d | Thomas Thrainer | self.minor, result.output)
|
1008 | 89ff748d | Thomas Thrainer | |
1009 | 89ff748d | Thomas Thrainer | def DisconnectNet(self): |
1010 | 89ff748d | Thomas Thrainer | """Removes network configuration.
|
1011 | 89ff748d | Thomas Thrainer |
|
1012 | 89ff748d | Thomas Thrainer | This method shutdowns the network side of the device.
|
1013 | 89ff748d | Thomas Thrainer |
|
1014 | 89ff748d | Thomas Thrainer | The method will wait up to a hardcoded timeout for the device to
|
1015 | 89ff748d | Thomas Thrainer | go into standalone after the 'disconnect' command before
|
1016 | 89ff748d | Thomas Thrainer | re-configuring it, as sometimes it takes a while for the
|
1017 | 89ff748d | Thomas Thrainer | disconnect to actually propagate and thus we might issue a 'net'
|
1018 | 89ff748d | Thomas Thrainer | command while the device is still connected. If the device will
|
1019 | 89ff748d | Thomas Thrainer | still be attached to the network and we time out, we raise an
|
1020 | 89ff748d | Thomas Thrainer | exception.
|
1021 | 89ff748d | Thomas Thrainer |
|
1022 | 89ff748d | Thomas Thrainer | """
|
1023 | 89ff748d | Thomas Thrainer | if self.minor is None: |
1024 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: disk not attached in re-attach net",
|
1025 | 89ff748d | Thomas Thrainer | self._aminor)
|
1026 | 89ff748d | Thomas Thrainer | |
1027 | 89ff748d | Thomas Thrainer | if None in (self._lhost, self._lport, self._rhost, self._rport): |
1028 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: DRBD disk missing network info in"
|
1029 | 89ff748d | Thomas Thrainer | " DisconnectNet()", self.minor) |
1030 | 89ff748d | Thomas Thrainer | |
1031 | 89ff748d | Thomas Thrainer | class _DisconnectStatus: |
1032 | 89ff748d | Thomas Thrainer | def __init__(self, ever_disconnected): |
1033 | 89ff748d | Thomas Thrainer | self.ever_disconnected = ever_disconnected
|
1034 | 89ff748d | Thomas Thrainer | |
1035 | 89ff748d | Thomas Thrainer | dstatus = _DisconnectStatus(base.IgnoreError(self._ShutdownNet, self.minor)) |
1036 | 89ff748d | Thomas Thrainer | |
1037 | 89ff748d | Thomas Thrainer | def _WaitForDisconnect(): |
1038 | 89ff748d | Thomas Thrainer | if self.GetProcStatus().is_standalone: |
1039 | 89ff748d | Thomas Thrainer | return
|
1040 | 89ff748d | Thomas Thrainer | |
1041 | 89ff748d | Thomas Thrainer | # retry the disconnect, it seems possible that due to a well-time
|
1042 | 89ff748d | Thomas Thrainer | # disconnect on the peer, my disconnect command might be ignored and
|
1043 | 89ff748d | Thomas Thrainer | # forgotten
|
1044 | 89ff748d | Thomas Thrainer | dstatus.ever_disconnected = \ |
1045 | 89ff748d | Thomas Thrainer | base.IgnoreError(self._ShutdownNet, self.minor) or \ |
1046 | 89ff748d | Thomas Thrainer | dstatus.ever_disconnected |
1047 | 89ff748d | Thomas Thrainer | |
1048 | 89ff748d | Thomas Thrainer | raise utils.RetryAgain()
|
1049 | 89ff748d | Thomas Thrainer | |
1050 | 89ff748d | Thomas Thrainer | # Keep start time
|
1051 | 89ff748d | Thomas Thrainer | start_time = time.time() |
1052 | 89ff748d | Thomas Thrainer | |
1053 | 89ff748d | Thomas Thrainer | try:
|
1054 | 89ff748d | Thomas Thrainer | # Start delay at 100 milliseconds and grow up to 2 seconds
|
1055 | 89ff748d | Thomas Thrainer | utils.Retry(_WaitForDisconnect, (0.1, 1.5, 2.0), |
1056 | 89ff748d | Thomas Thrainer | self._NET_RECONFIG_TIMEOUT)
|
1057 | 89ff748d | Thomas Thrainer | except utils.RetryTimeout:
|
1058 | 89ff748d | Thomas Thrainer | if dstatus.ever_disconnected:
|
1059 | 89ff748d | Thomas Thrainer | msg = ("drbd%d: device did not react to the"
|
1060 | 89ff748d | Thomas Thrainer | " 'disconnect' command in a timely manner")
|
1061 | 89ff748d | Thomas Thrainer | else:
|
1062 | 89ff748d | Thomas Thrainer | msg = "drbd%d: can't shutdown network, even after multiple retries"
|
1063 | 89ff748d | Thomas Thrainer | |
1064 | 89ff748d | Thomas Thrainer | base.ThrowError(msg, self.minor)
|
1065 | 89ff748d | Thomas Thrainer | |
1066 | 89ff748d | Thomas Thrainer | reconfig_time = time.time() - start_time |
1067 | 89ff748d | Thomas Thrainer | if reconfig_time > (self._NET_RECONFIG_TIMEOUT * 0.25): |
1068 | 89ff748d | Thomas Thrainer | logging.info("drbd%d: DisconnectNet: detach took %.3f seconds",
|
1069 | 89ff748d | Thomas Thrainer | self.minor, reconfig_time)
|
1070 | 89ff748d | Thomas Thrainer | |
1071 | 89ff748d | Thomas Thrainer | def AttachNet(self, multimaster): |
1072 | 89ff748d | Thomas Thrainer | """Reconnects the network.
|
1073 | 89ff748d | Thomas Thrainer |
|
1074 | 89ff748d | Thomas Thrainer | This method connects the network side of the device with a
|
1075 | 89ff748d | Thomas Thrainer | specified multi-master flag. The device needs to be 'Standalone'
|
1076 | 89ff748d | Thomas Thrainer | but have valid network configuration data.
|
1077 | 89ff748d | Thomas Thrainer |
|
1078 | 89ff748d | Thomas Thrainer | Args:
|
1079 | 89ff748d | Thomas Thrainer | - multimaster: init the network in dual-primary mode
|
1080 | 89ff748d | Thomas Thrainer |
|
1081 | 89ff748d | Thomas Thrainer | """
|
1082 | 89ff748d | Thomas Thrainer | if self.minor is None: |
1083 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: device not attached in AttachNet", self._aminor) |
1084 | 89ff748d | Thomas Thrainer | |
1085 | 89ff748d | Thomas Thrainer | if None in (self._lhost, self._lport, self._rhost, self._rport): |
1086 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: missing network info in AttachNet()", self.minor) |
1087 | 89ff748d | Thomas Thrainer | |
1088 | 89ff748d | Thomas Thrainer | status = self.GetProcStatus()
|
1089 | 89ff748d | Thomas Thrainer | |
1090 | 89ff748d | Thomas Thrainer | if not status.is_standalone: |
1091 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: device is not standalone in AttachNet",
|
1092 | 89ff748d | Thomas Thrainer | self.minor)
|
1093 | 89ff748d | Thomas Thrainer | |
1094 | 89ff748d | Thomas Thrainer | self._AssembleNet(self.minor, |
1095 | 89ff748d | Thomas Thrainer | (self._lhost, self._lport, self._rhost, self._rport), |
1096 | 89ff748d | Thomas Thrainer | constants.DRBD_NET_PROTOCOL, dual_pri=multimaster, |
1097 | 89ff748d | Thomas Thrainer | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1098 | 89ff748d | Thomas Thrainer | |
1099 | 89ff748d | Thomas Thrainer | def Attach(self): |
1100 | 89ff748d | Thomas Thrainer | """Check if our minor is configured.
|
1101 | 89ff748d | Thomas Thrainer |
|
1102 | 89ff748d | Thomas Thrainer | This doesn't do any device configurations - it only checks if the
|
1103 | 89ff748d | Thomas Thrainer | minor is in a state different from Unconfigured.
|
1104 | 89ff748d | Thomas Thrainer |
|
1105 | 89ff748d | Thomas Thrainer | Note that this function will not change the state of the system in
|
1106 | 89ff748d | Thomas Thrainer | any way (except in case of side-effects caused by reading from
|
1107 | 89ff748d | Thomas Thrainer | /proc).
|
1108 | 89ff748d | Thomas Thrainer |
|
1109 | 89ff748d | Thomas Thrainer | """
|
1110 | 89ff748d | Thomas Thrainer | used_devs = self.GetUsedDevs()
|
1111 | 89ff748d | Thomas Thrainer | if self._aminor in used_devs: |
1112 | 89ff748d | Thomas Thrainer | minor = self._aminor
|
1113 | 89ff748d | Thomas Thrainer | else:
|
1114 | 89ff748d | Thomas Thrainer | minor = None
|
1115 | 89ff748d | Thomas Thrainer | |
1116 | 89ff748d | Thomas Thrainer | self._SetFromMinor(minor)
|
1117 | 89ff748d | Thomas Thrainer | return minor is not None |
1118 | 89ff748d | Thomas Thrainer | |
1119 | 89ff748d | Thomas Thrainer | def Assemble(self): |
1120 | 89ff748d | Thomas Thrainer | """Assemble the drbd.
|
1121 | 89ff748d | Thomas Thrainer |
|
1122 | 89ff748d | Thomas Thrainer | Method:
|
1123 | 89ff748d | Thomas Thrainer | - if we have a configured device, we try to ensure that it matches
|
1124 | 89ff748d | Thomas Thrainer | our config
|
1125 | 89ff748d | Thomas Thrainer | - if not, we create it from zero
|
1126 | 89ff748d | Thomas Thrainer | - anyway, set the device parameters
|
1127 | 89ff748d | Thomas Thrainer |
|
1128 | 89ff748d | Thomas Thrainer | """
|
1129 | 89ff748d | Thomas Thrainer | super(DRBD8, self).Assemble() |
1130 | 89ff748d | Thomas Thrainer | |
1131 | 89ff748d | Thomas Thrainer | self.Attach()
|
1132 | 89ff748d | Thomas Thrainer | if self.minor is None: |
1133 | 89ff748d | Thomas Thrainer | # local device completely unconfigured
|
1134 | 89ff748d | Thomas Thrainer | self._FastAssemble()
|
1135 | 89ff748d | Thomas Thrainer | else:
|
1136 | 89ff748d | Thomas Thrainer | # we have to recheck the local and network status and try to fix
|
1137 | 89ff748d | Thomas Thrainer | # the device
|
1138 | 89ff748d | Thomas Thrainer | self._SlowAssemble()
|
1139 | 89ff748d | Thomas Thrainer | |
1140 | 89ff748d | Thomas Thrainer | sync_errors = self.SetSyncParams(self.params) |
1141 | 89ff748d | Thomas Thrainer | if sync_errors:
|
1142 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't set the synchronization parameters: %s" %
|
1143 | 89ff748d | Thomas Thrainer | (self.minor, utils.CommaJoin(sync_errors)))
|
1144 | 89ff748d | Thomas Thrainer | |
1145 | 89ff748d | Thomas Thrainer | def _SlowAssemble(self): |
1146 | 89ff748d | Thomas Thrainer | """Assembles the DRBD device from a (partially) configured device.
|
1147 | 89ff748d | Thomas Thrainer |
|
1148 | 89ff748d | Thomas Thrainer | In case of partially attached (local device matches but no network
|
1149 | 89ff748d | Thomas Thrainer | setup), we perform the network attach. If successful, we re-test
|
1150 | 89ff748d | Thomas Thrainer | the attach if can return success.
|
1151 | 89ff748d | Thomas Thrainer |
|
1152 | 89ff748d | Thomas Thrainer | """
|
1153 | 89ff748d | Thomas Thrainer | # TODO: Rewrite to not use a for loop just because there is 'break'
|
1154 | 89ff748d | Thomas Thrainer | # pylint: disable=W0631
|
1155 | 89ff748d | Thomas Thrainer | net_data = (self._lhost, self._lport, self._rhost, self._rport) |
1156 | 89ff748d | Thomas Thrainer | for minor in (self._aminor,): |
1157 | 89ff748d | Thomas Thrainer | info = self._GetDevInfo(self._GetShowData(minor)) |
1158 | 89ff748d | Thomas Thrainer | match_l = self._MatchesLocal(info)
|
1159 | 89ff748d | Thomas Thrainer | match_r = self._MatchesNet(info)
|
1160 | 89ff748d | Thomas Thrainer | |
1161 | 89ff748d | Thomas Thrainer | if match_l and match_r: |
1162 | 89ff748d | Thomas Thrainer | # everything matches
|
1163 | 89ff748d | Thomas Thrainer | break
|
1164 | 89ff748d | Thomas Thrainer | |
1165 | 89ff748d | Thomas Thrainer | if match_l and not match_r and "local_addr" not in info: |
1166 | 89ff748d | Thomas Thrainer | # disk matches, but not attached to network, attach and recheck
|
1167 | 89ff748d | Thomas Thrainer | self._AssembleNet(minor, net_data, constants.DRBD_NET_PROTOCOL,
|
1168 | 89ff748d | Thomas Thrainer | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1169 | 89ff748d | Thomas Thrainer | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1170 | 89ff748d | Thomas Thrainer | break
|
1171 | 89ff748d | Thomas Thrainer | else:
|
1172 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: network attach successful, but 'drbdsetup"
|
1173 | 89ff748d | Thomas Thrainer | " show' disagrees", minor)
|
1174 | 89ff748d | Thomas Thrainer | |
1175 | 89ff748d | Thomas Thrainer | if match_r and "local_dev" not in info: |
1176 | 89ff748d | Thomas Thrainer | # no local disk, but network attached and it matches
|
1177 | 89ff748d | Thomas Thrainer | self._AssembleLocal(minor, self._children[0].dev_path, |
1178 | 89ff748d | Thomas Thrainer | self._children[1].dev_path, self.size) |
1179 | 89ff748d | Thomas Thrainer | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1180 | 89ff748d | Thomas Thrainer | break
|
1181 | 89ff748d | Thomas Thrainer | else:
|
1182 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: disk attach successful, but 'drbdsetup"
|
1183 | 89ff748d | Thomas Thrainer | " show' disagrees", minor)
|
1184 | 89ff748d | Thomas Thrainer | |
1185 | 89ff748d | Thomas Thrainer | # this case must be considered only if we actually have local
|
1186 | 89ff748d | Thomas Thrainer | # storage, i.e. not in diskless mode, because all diskless
|
1187 | 89ff748d | Thomas Thrainer | # devices are equal from the point of view of local
|
1188 | 89ff748d | Thomas Thrainer | # configuration
|
1189 | 89ff748d | Thomas Thrainer | if (match_l and "local_dev" in info and |
1190 | 89ff748d | Thomas Thrainer | not match_r and "local_addr" in info): |
1191 | 89ff748d | Thomas Thrainer | # strange case - the device network part points to somewhere
|
1192 | 89ff748d | Thomas Thrainer | # else, even though its local storage is ours; as we own the
|
1193 | 89ff748d | Thomas Thrainer | # drbd space, we try to disconnect from the remote peer and
|
1194 | 89ff748d | Thomas Thrainer | # reconnect to our correct one
|
1195 | 89ff748d | Thomas Thrainer | try:
|
1196 | 89ff748d | Thomas Thrainer | self._ShutdownNet(minor)
|
1197 | 89ff748d | Thomas Thrainer | except errors.BlockDeviceError, err:
|
1198 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: device has correct local storage, wrong"
|
1199 | 89ff748d | Thomas Thrainer | " remote peer and is unable to disconnect in order"
|
1200 | 89ff748d | Thomas Thrainer | " to attach to the correct peer: %s", minor, str(err)) |
1201 | 89ff748d | Thomas Thrainer | # note: _AssembleNet also handles the case when we don't want
|
1202 | 89ff748d | Thomas Thrainer | # local storage (i.e. one or more of the _[lr](host|port) is
|
1203 | 89ff748d | Thomas Thrainer | # None)
|
1204 | 89ff748d | Thomas Thrainer | self._AssembleNet(minor, net_data, constants.DRBD_NET_PROTOCOL,
|
1205 | 89ff748d | Thomas Thrainer | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1206 | 89ff748d | Thomas Thrainer | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1207 | 89ff748d | Thomas Thrainer | break
|
1208 | 89ff748d | Thomas Thrainer | else:
|
1209 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: network attach successful, but 'drbdsetup"
|
1210 | 89ff748d | Thomas Thrainer | " show' disagrees", minor)
|
1211 | 89ff748d | Thomas Thrainer | |
1212 | 89ff748d | Thomas Thrainer | else:
|
1213 | 89ff748d | Thomas Thrainer | minor = None
|
1214 | 89ff748d | Thomas Thrainer | |
1215 | 89ff748d | Thomas Thrainer | self._SetFromMinor(minor)
|
1216 | 89ff748d | Thomas Thrainer | if minor is None: |
1217 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: cannot activate, unknown or unhandled reason",
|
1218 | 89ff748d | Thomas Thrainer | self._aminor)
|
1219 | 89ff748d | Thomas Thrainer | |
1220 | 89ff748d | Thomas Thrainer | def _FastAssemble(self): |
1221 | 89ff748d | Thomas Thrainer | """Assemble the drbd device from zero.
|
1222 | 89ff748d | Thomas Thrainer |
|
1223 | 89ff748d | Thomas Thrainer | This is run when in Assemble we detect our minor is unused.
|
1224 | 89ff748d | Thomas Thrainer |
|
1225 | 89ff748d | Thomas Thrainer | """
|
1226 | 89ff748d | Thomas Thrainer | minor = self._aminor
|
1227 | 89ff748d | Thomas Thrainer | if self._children and self._children[0] and self._children[1]: |
1228 | 89ff748d | Thomas Thrainer | self._AssembleLocal(minor, self._children[0].dev_path, |
1229 | 89ff748d | Thomas Thrainer | self._children[1].dev_path, self.size) |
1230 | 89ff748d | Thomas Thrainer | if self._lhost and self._lport and self._rhost and self._rport: |
1231 | 89ff748d | Thomas Thrainer | self._AssembleNet(minor,
|
1232 | 89ff748d | Thomas Thrainer | (self._lhost, self._lport, self._rhost, self._rport), |
1233 | 89ff748d | Thomas Thrainer | constants.DRBD_NET_PROTOCOL, |
1234 | 89ff748d | Thomas Thrainer | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1235 | 89ff748d | Thomas Thrainer | self._SetFromMinor(minor)
|
1236 | 89ff748d | Thomas Thrainer | |
1237 | 89ff748d | Thomas Thrainer | @classmethod
|
1238 | 89ff748d | Thomas Thrainer | def _ShutdownLocal(cls, minor): |
1239 | 89ff748d | Thomas Thrainer | """Detach from the local device.
|
1240 | 89ff748d | Thomas Thrainer |
|
1241 | 89ff748d | Thomas Thrainer | I/Os will continue to be served from the remote device. If we
|
1242 | 89ff748d | Thomas Thrainer | don't have a remote device, this operation will fail.
|
1243 | 89ff748d | Thomas Thrainer |
|
1244 | 89ff748d | Thomas Thrainer | """
|
1245 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
1246 | 89ff748d | Thomas Thrainer | if result.failed:
|
1247 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't detach local disk: %s",
|
1248 | 89ff748d | Thomas Thrainer | minor, result.output) |
1249 | 89ff748d | Thomas Thrainer | |
1250 | 89ff748d | Thomas Thrainer | @classmethod
|
1251 | 89ff748d | Thomas Thrainer | def _ShutdownNet(cls, minor): |
1252 | 89ff748d | Thomas Thrainer | """Disconnect from the remote peer.
|
1253 | 89ff748d | Thomas Thrainer |
|
1254 | 89ff748d | Thomas Thrainer | This fails if we don't have a local device.
|
1255 | 89ff748d | Thomas Thrainer |
|
1256 | 89ff748d | Thomas Thrainer | """
|
1257 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
1258 | 89ff748d | Thomas Thrainer | if result.failed:
|
1259 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't shutdown network: %s",
|
1260 | 89ff748d | Thomas Thrainer | minor, result.output) |
1261 | 89ff748d | Thomas Thrainer | |
1262 | 89ff748d | Thomas Thrainer | @classmethod
|
1263 | 89ff748d | Thomas Thrainer | def _ShutdownAll(cls, minor): |
1264 | 89ff748d | Thomas Thrainer | """Deactivate the device.
|
1265 | 89ff748d | Thomas Thrainer |
|
1266 | 89ff748d | Thomas Thrainer | This will, of course, fail if the device is in use.
|
1267 | 89ff748d | Thomas Thrainer |
|
1268 | 89ff748d | Thomas Thrainer | """
|
1269 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "down"]) |
1270 | 89ff748d | Thomas Thrainer | if result.failed:
|
1271 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't shutdown drbd device: %s",
|
1272 | 89ff748d | Thomas Thrainer | minor, result.output) |
1273 | 89ff748d | Thomas Thrainer | |
1274 | 89ff748d | Thomas Thrainer | def Shutdown(self): |
1275 | 89ff748d | Thomas Thrainer | """Shutdown the DRBD device.
|
1276 | 89ff748d | Thomas Thrainer |
|
1277 | 89ff748d | Thomas Thrainer | """
|
1278 | 89ff748d | Thomas Thrainer | if self.minor is None and not self.Attach(): |
1279 | 89ff748d | Thomas Thrainer | logging.info("drbd%d: not attached during Shutdown()", self._aminor) |
1280 | 89ff748d | Thomas Thrainer | return
|
1281 | 89ff748d | Thomas Thrainer | minor = self.minor
|
1282 | 89ff748d | Thomas Thrainer | self.minor = None |
1283 | 89ff748d | Thomas Thrainer | self.dev_path = None |
1284 | 89ff748d | Thomas Thrainer | self._ShutdownAll(minor)
|
1285 | 89ff748d | Thomas Thrainer | |
1286 | 89ff748d | Thomas Thrainer | def Remove(self): |
1287 | 89ff748d | Thomas Thrainer | """Stub remove for DRBD devices.
|
1288 | 89ff748d | Thomas Thrainer |
|
1289 | 89ff748d | Thomas Thrainer | """
|
1290 | 89ff748d | Thomas Thrainer | self.Shutdown()
|
1291 | 89ff748d | Thomas Thrainer | |
1292 | fd300bc7 | Thomas Thrainer | def Rename(self, new_id): |
1293 | fd300bc7 | Thomas Thrainer | """Rename a device.
|
1294 | fd300bc7 | Thomas Thrainer |
|
1295 | fd300bc7 | Thomas Thrainer | This is not supported for drbd devices.
|
1296 | fd300bc7 | Thomas Thrainer |
|
1297 | fd300bc7 | Thomas Thrainer | """
|
1298 | fd300bc7 | Thomas Thrainer | raise errors.ProgrammerError("Can't rename a drbd device") |
1299 | fd300bc7 | Thomas Thrainer | |
1300 | 89ff748d | Thomas Thrainer | @classmethod
|
1301 | 89ff748d | Thomas Thrainer | def Create(cls, unique_id, children, size, params, excl_stor): |
1302 | 89ff748d | Thomas Thrainer | """Create a new DRBD8 device.
|
1303 | 89ff748d | Thomas Thrainer |
|
1304 | 89ff748d | Thomas Thrainer | Since DRBD devices are not created per se, just assembled, this
|
1305 | 89ff748d | Thomas Thrainer | function only initializes the metadata.
|
1306 | 89ff748d | Thomas Thrainer |
|
1307 | 89ff748d | Thomas Thrainer | """
|
1308 | 89ff748d | Thomas Thrainer | if len(children) != 2: |
1309 | 89ff748d | Thomas Thrainer | raise errors.ProgrammerError("Invalid setup for the drbd device") |
1310 | 89ff748d | Thomas Thrainer | if excl_stor:
|
1311 | 89ff748d | Thomas Thrainer | raise errors.ProgrammerError("DRBD device requested with" |
1312 | 89ff748d | Thomas Thrainer | " exclusive_storage")
|
1313 | 89ff748d | Thomas Thrainer | # check that the minor is unused
|
1314 | 89ff748d | Thomas Thrainer | aminor = unique_id[4]
|
1315 | 38396ae2 | Thomas Thrainer | proc_info = cls._JoinProcDataPerMinor(cls._GetProcData()) |
1316 | 89ff748d | Thomas Thrainer | if aminor in proc_info: |
1317 | 89ff748d | Thomas Thrainer | status = DRBD8Status(proc_info[aminor]) |
1318 | 89ff748d | Thomas Thrainer | in_use = status.is_in_use |
1319 | 89ff748d | Thomas Thrainer | else:
|
1320 | 89ff748d | Thomas Thrainer | in_use = False
|
1321 | 89ff748d | Thomas Thrainer | if in_use:
|
1322 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: minor is already in use at Create() time",
|
1323 | 89ff748d | Thomas Thrainer | aminor) |
1324 | 89ff748d | Thomas Thrainer | meta = children[1]
|
1325 | 89ff748d | Thomas Thrainer | meta.Assemble() |
1326 | 89ff748d | Thomas Thrainer | if not meta.Attach(): |
1327 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: can't attach to meta device '%s'",
|
1328 | 89ff748d | Thomas Thrainer | aminor, meta) |
1329 | 89ff748d | Thomas Thrainer | cls._CheckMetaSize(meta.dev_path) |
1330 | 89ff748d | Thomas Thrainer | cls._InitMeta(aminor, meta.dev_path) |
1331 | 89ff748d | Thomas Thrainer | return cls(unique_id, children, size, params)
|
1332 | 89ff748d | Thomas Thrainer | |
1333 | 89ff748d | Thomas Thrainer | def Grow(self, amount, dryrun, backingstore): |
1334 | 89ff748d | Thomas Thrainer | """Resize the DRBD device and its backing storage.
|
1335 | 89ff748d | Thomas Thrainer |
|
1336 | 89ff748d | Thomas Thrainer | """
|
1337 | 89ff748d | Thomas Thrainer | if self.minor is None: |
1338 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: Grow called while not attached", self._aminor) |
1339 | 89ff748d | Thomas Thrainer | if len(self._children) != 2 or None in self._children: |
1340 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: cannot grow diskless device", self.minor) |
1341 | 89ff748d | Thomas Thrainer | self._children[0].Grow(amount, dryrun, backingstore) |
1342 | 89ff748d | Thomas Thrainer | if dryrun or backingstore: |
1343 | 89ff748d | Thomas Thrainer | # DRBD does not support dry-run mode and is not backing storage,
|
1344 | 89ff748d | Thomas Thrainer | # so we'll return here
|
1345 | 89ff748d | Thomas Thrainer | return
|
1346 | 89ff748d | Thomas Thrainer | result = utils.RunCmd(["drbdsetup", self.dev_path, "resize", "-s", |
1347 | 89ff748d | Thomas Thrainer | "%dm" % (self.size + amount)]) |
1348 | 89ff748d | Thomas Thrainer | if result.failed:
|
1349 | 89ff748d | Thomas Thrainer | base.ThrowError("drbd%d: resize failed: %s", self.minor, result.output) |
1350 | 89ff748d | Thomas Thrainer | |
1351 | 89ff748d | Thomas Thrainer | |
1352 | 89ff748d | Thomas Thrainer | def _CanReadDevice(path): |
1353 | 89ff748d | Thomas Thrainer | """Check if we can read from the given device.
|
1354 | 89ff748d | Thomas Thrainer |
|
1355 | 89ff748d | Thomas Thrainer | This tries to read the first 128k of the device.
|
1356 | 89ff748d | Thomas Thrainer |
|
1357 | 89ff748d | Thomas Thrainer | """
|
1358 | 89ff748d | Thomas Thrainer | try:
|
1359 | 89ff748d | Thomas Thrainer | utils.ReadFile(path, size=_DEVICE_READ_SIZE) |
1360 | 89ff748d | Thomas Thrainer | return True |
1361 | 89ff748d | Thomas Thrainer | except EnvironmentError: |
1362 | 89ff748d | Thomas Thrainer | logging.warning("Can't read from device %s", path, exc_info=True) |
1363 | 89ff748d | Thomas Thrainer | return False |