root / lib / storage / bdev.py @ fb0fa957
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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | 5454737c | Iustin Pop | # Copyright (C) 2006, 2007, 2010, 2011, 2012, 2013 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | e7d34815 | Santi Raffa | """Block device abstraction.
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23 | e7d34815 | Santi Raffa |
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24 | e7d34815 | Santi Raffa | """
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25 | a8083063 | Iustin Pop | |
26 | a8083063 | Iustin Pop | import re |
27 | b6135bbc | Apollon Oikonomopoulos | import stat |
28 | 6f695a2e | Manuel Franceschini | import os |
29 | 468c5f77 | Iustin Pop | import logging |
30 | 63c73073 | Bernardo Dal Seno | import math |
31 | a8083063 | Iustin Pop | |
32 | a8083063 | Iustin Pop | from ganeti import utils |
33 | a8083063 | Iustin Pop | from ganeti import errors |
34 | fe96220b | Iustin Pop | from ganeti import constants |
35 | 96acbc09 | Michael Hanselmann | from ganeti import objects |
36 | cea881e5 | Michael Hanselmann | from ganeti import compat |
37 | fbdac0d9 | Michael Hanselmann | from ganeti import pathutils |
38 | bdecfea2 | Stratos Psomadakis | from ganeti import serializer |
39 | cde49218 | Helga Velroyen | from ganeti.storage import base |
40 | 13a6c760 | Helga Velroyen | from ganeti.storage import drbd |
41 | 2656b017 | Santi Raffa | from ganeti.storage.filestorage import FileStorage |
42 | 8106dd64 | Santi Raffa | from ganeti.storage.gluster import GlusterStorage |
43 | 310fbb64 | Iustin Pop | |
44 | 310fbb64 | Iustin Pop | |
45 | bdecfea2 | Stratos Psomadakis | class RbdShowmappedJsonError(Exception): |
46 | bdecfea2 | Stratos Psomadakis | """`rbd showmmapped' JSON formatting error Exception class.
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47 | bdecfea2 | Stratos Psomadakis |
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48 | bdecfea2 | Stratos Psomadakis | """
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49 | bdecfea2 | Stratos Psomadakis | pass
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50 | bdecfea2 | Stratos Psomadakis | |
51 | bdecfea2 | Stratos Psomadakis | |
52 | e398546b | Iustin Pop | def _CheckResult(result): |
53 | e398546b | Iustin Pop | """Throws an error if the given result is a failed one.
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54 | e398546b | Iustin Pop |
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55 | e398546b | Iustin Pop | @param result: result from RunCmd
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56 | e398546b | Iustin Pop |
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57 | e398546b | Iustin Pop | """
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58 | e398546b | Iustin Pop | if result.failed:
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59 | 89ff748d | Thomas Thrainer | base.ThrowError("Command: %s error: %s - %s",
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60 | 89ff748d | Thomas Thrainer | result.cmd, result.fail_reason, result.output) |
61 | 310fbb64 | Iustin Pop | |
62 | 310fbb64 | Iustin Pop | |
63 | 89ff748d | Thomas Thrainer | class LogicalVolume(base.BlockDev): |
64 | a8083063 | Iustin Pop | """Logical Volume block device.
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65 | a8083063 | Iustin Pop |
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66 | a8083063 | Iustin Pop | """
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67 | 6136f8f0 | Iustin Pop | _VALID_NAME_RE = re.compile("^[a-zA-Z0-9+_.-]*$")
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68 | 78f99abb | Michele Tartara | _PARSE_PV_DEV_RE = re.compile(r"^([^ ()]+)\([0-9]+\)$")
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69 | b8028dcf | Michael Hanselmann | _INVALID_NAMES = compat.UniqueFrozenset([".", "..", "snapshot", "pvmove"]) |
70 | b8028dcf | Michael Hanselmann | _INVALID_SUBSTRINGS = compat.UniqueFrozenset(["_mlog", "_mimage"]) |
71 | 6136f8f0 | Iustin Pop | |
72 | c032b2ce | Klaus Aehlig | def __init__(self, unique_id, children, size, params, dyn_params, *args): |
73 | a8083063 | Iustin Pop | """Attaches to a LV device.
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74 | a8083063 | Iustin Pop |
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75 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
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76 | a8083063 | Iustin Pop |
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77 | a8083063 | Iustin Pop | """
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78 | 0c3d9c7c | Thomas Thrainer | super(LogicalVolume, self).__init__(unique_id, children, size, params, |
79 | c032b2ce | Klaus Aehlig | dyn_params, *args) |
80 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
81 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
82 | a8083063 | Iustin Pop | self._vg_name, self._lv_name = unique_id |
83 | 6136f8f0 | Iustin Pop | self._ValidateName(self._vg_name) |
84 | 6136f8f0 | Iustin Pop | self._ValidateName(self._lv_name) |
85 | 6136f8f0 | Iustin Pop | self.dev_path = utils.PathJoin("/dev", self._vg_name, self._lv_name) |
86 | 99e8295c | Iustin Pop | self._degraded = True |
87 | 38256320 | Iustin Pop | self.major = self.minor = self.pe_size = self.stripe_count = None |
88 | b5d48e87 | Bernardo Dal Seno | self.pv_names = None |
89 | a8083063 | Iustin Pop | self.Attach()
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90 | a8083063 | Iustin Pop | |
91 | 63c73073 | Bernardo Dal Seno | @staticmethod
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92 | 63c73073 | Bernardo Dal Seno | def _GetStdPvSize(pvs_info): |
93 | 63c73073 | Bernardo Dal Seno | """Return the the standard PV size (used with exclusive storage).
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94 | 63c73073 | Bernardo Dal Seno |
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95 | 63c73073 | Bernardo Dal Seno | @param pvs_info: list of objects.LvmPvInfo, cannot be empty
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96 | 63c73073 | Bernardo Dal Seno | @rtype: float
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97 | 63c73073 | Bernardo Dal Seno | @return: size in MiB
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98 | 63c73073 | Bernardo Dal Seno |
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99 | 63c73073 | Bernardo Dal Seno | """
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100 | 63c73073 | Bernardo Dal Seno | assert len(pvs_info) > 0 |
101 | 63c73073 | Bernardo Dal Seno | smallest = min([pv.size for pv in pvs_info]) |
102 | 63c73073 | Bernardo Dal Seno | return smallest / (1 + constants.PART_MARGIN + constants.PART_RESERVED) |
103 | 63c73073 | Bernardo Dal Seno | |
104 | 63c73073 | Bernardo Dal Seno | @staticmethod
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105 | 63c73073 | Bernardo Dal Seno | def _ComputeNumPvs(size, pvs_info): |
106 | 63c73073 | Bernardo Dal Seno | """Compute the number of PVs needed for an LV (with exclusive storage).
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107 | 63c73073 | Bernardo Dal Seno |
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108 | 63c73073 | Bernardo Dal Seno | @type size: float
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109 | 23d95cff | Bernardo Dal Seno | @param size: LV size in MiB
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110 | 63c73073 | Bernardo Dal Seno | @param pvs_info: list of objects.LvmPvInfo, cannot be empty
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111 | 63c73073 | Bernardo Dal Seno | @rtype: integer
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112 | 63c73073 | Bernardo Dal Seno | @return: number of PVs needed
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113 | 63c73073 | Bernardo Dal Seno | """
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114 | 63c73073 | Bernardo Dal Seno | assert len(pvs_info) > 0 |
115 | 63c73073 | Bernardo Dal Seno | pv_size = float(LogicalVolume._GetStdPvSize(pvs_info))
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116 | 63c73073 | Bernardo Dal Seno | return int(math.ceil(float(size) / pv_size)) |
117 | 63c73073 | Bernardo Dal Seno | |
118 | 63c73073 | Bernardo Dal Seno | @staticmethod
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119 | 63c73073 | Bernardo Dal Seno | def _GetEmptyPvNames(pvs_info, max_pvs=None): |
120 | 63c73073 | Bernardo Dal Seno | """Return a list of empty PVs, by name.
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121 | 63c73073 | Bernardo Dal Seno |
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122 | 63c73073 | Bernardo Dal Seno | """
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123 | 63c73073 | Bernardo Dal Seno | empty_pvs = filter(objects.LvmPvInfo.IsEmpty, pvs_info)
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124 | 63c73073 | Bernardo Dal Seno | if max_pvs is not None: |
125 | 63c73073 | Bernardo Dal Seno | empty_pvs = empty_pvs[:max_pvs] |
126 | 63c73073 | Bernardo Dal Seno | return map((lambda pv: pv.name), empty_pvs) |
127 | 63c73073 | Bernardo Dal Seno | |
128 | a8083063 | Iustin Pop | @classmethod
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129 | 0c3d9c7c | Thomas Thrainer | def Create(cls, unique_id, children, size, spindles, params, excl_stor, |
130 | bddc92ee | Klaus Aehlig | dyn_params, *args): |
131 | a8083063 | Iustin Pop | """Create a new logical volume.
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132 | a8083063 | Iustin Pop |
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133 | a8083063 | Iustin Pop | """
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134 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
135 | 6c626518 | Iustin Pop | raise errors.ProgrammerError("Invalid configuration data %s" % |
136 | 6c626518 | Iustin Pop | str(unique_id))
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137 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
138 | 6136f8f0 | Iustin Pop | cls._ValidateName(vg_name) |
139 | 6136f8f0 | Iustin Pop | cls._ValidateName(lv_name) |
140 | 2070598f | Iustin Pop | pvs_info = cls.GetPVInfo([vg_name]) |
141 | a8083063 | Iustin Pop | if not pvs_info: |
142 | 63c73073 | Bernardo Dal Seno | if excl_stor:
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143 | 63c73073 | Bernardo Dal Seno | msg = "No (empty) PVs found"
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144 | 63c73073 | Bernardo Dal Seno | else:
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145 | 63c73073 | Bernardo Dal Seno | msg = "Can't compute PV info for vg %s" % vg_name
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146 | 89ff748d | Thomas Thrainer | base.ThrowError(msg) |
147 | 59726e15 | Bernardo Dal Seno | pvs_info.sort(key=(lambda pv: pv.free), reverse=True) |
148 | 5b7b5d49 | Guido Trotter | |
149 | 59726e15 | Bernardo Dal Seno | pvlist = [pv.name for pv in pvs_info] |
150 | 403f5172 | Guido Trotter | if compat.any(":" in v for v in pvlist): |
151 | 89ff748d | Thomas Thrainer | base.ThrowError("Some of your PVs have the invalid character ':' in their"
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152 | 89ff748d | Thomas Thrainer | " name, this is not supported - please filter them out"
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153 | 89ff748d | Thomas Thrainer | " in lvm.conf using either 'filter' or 'preferred_names'")
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154 | 63c73073 | Bernardo Dal Seno | |
155 | fecbe9d5 | Iustin Pop | current_pvs = len(pvlist)
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156 | ac00bf1b | Andrea Spadaccini | desired_stripes = params[constants.LDP_STRIPES] |
157 | 43e11798 | Andrea Spadaccini | stripes = min(current_pvs, desired_stripes)
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158 | 63c73073 | Bernardo Dal Seno | |
159 | 63c73073 | Bernardo Dal Seno | if excl_stor:
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160 | 7c848a6a | Bernardo Dal Seno | if spindles is None: |
161 | 7c848a6a | Bernardo Dal Seno | base.ThrowError("Unspecified number of spindles: this is required"
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162 | 7c848a6a | Bernardo Dal Seno | "when exclusive storage is enabled, try running"
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163 | 7c848a6a | Bernardo Dal Seno | " gnt-cluster repair-disk-sizes")
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164 | 11064155 | Bernardo Dal Seno | (err_msgs, _) = utils.LvmExclusiveCheckNodePvs(pvs_info) |
165 | 63c73073 | Bernardo Dal Seno | if err_msgs:
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166 | 63c73073 | Bernardo Dal Seno | for m in err_msgs: |
167 | 63c73073 | Bernardo Dal Seno | logging.warning(m) |
168 | 63c73073 | Bernardo Dal Seno | req_pvs = cls._ComputeNumPvs(size, pvs_info) |
169 | 7c848a6a | Bernardo Dal Seno | if spindles < req_pvs:
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170 | 7c848a6a | Bernardo Dal Seno | base.ThrowError("Requested number of spindles (%s) is not enough for"
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171 | 7c848a6a | Bernardo Dal Seno | " a disk of %d MB (at least %d spindles needed)",
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172 | 7c848a6a | Bernardo Dal Seno | spindles, size, req_pvs) |
173 | 7c848a6a | Bernardo Dal Seno | else:
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174 | 7c848a6a | Bernardo Dal Seno | req_pvs = spindles |
175 | 63c73073 | Bernardo Dal Seno | pvlist = cls._GetEmptyPvNames(pvs_info, req_pvs) |
176 | 63c73073 | Bernardo Dal Seno | current_pvs = len(pvlist)
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177 | 63c73073 | Bernardo Dal Seno | if current_pvs < req_pvs:
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178 | 24c06acb | Bernardo Dal Seno | base.ThrowError("Not enough empty PVs (spindles) to create a disk of %d"
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179 | 24c06acb | Bernardo Dal Seno | " MB: %d available, %d needed",
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180 | 24c06acb | Bernardo Dal Seno | size, current_pvs, req_pvs) |
181 | 63c73073 | Bernardo Dal Seno | assert current_pvs == len(pvlist) |
182 | 577edf04 | Bernardo Dal Seno | # We must update stripes to be sure to use all the desired spindles
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183 | 577edf04 | Bernardo Dal Seno | stripes = current_pvs |
184 | 577edf04 | Bernardo Dal Seno | if stripes > desired_stripes:
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185 | 577edf04 | Bernardo Dal Seno | # Don't warn when lowering stripes, as it's no surprise
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186 | 577edf04 | Bernardo Dal Seno | logging.warning("Using %s stripes instead of %s, to be able to use"
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187 | 577edf04 | Bernardo Dal Seno | " %s spindles", stripes, desired_stripes, current_pvs)
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188 | 63c73073 | Bernardo Dal Seno | |
189 | 63c73073 | Bernardo Dal Seno | else:
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190 | 63c73073 | Bernardo Dal Seno | if stripes < desired_stripes:
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191 | 63c73073 | Bernardo Dal Seno | logging.warning("Could not use %d stripes for VG %s, as only %d PVs are"
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192 | 63c73073 | Bernardo Dal Seno | " available.", desired_stripes, vg_name, current_pvs)
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193 | 63c73073 | Bernardo Dal Seno | free_size = sum([pv.free for pv in pvs_info]) |
194 | 63c73073 | Bernardo Dal Seno | # The size constraint should have been checked from the master before
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195 | 63c73073 | Bernardo Dal Seno | # calling the create function.
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196 | 63c73073 | Bernardo Dal Seno | if free_size < size:
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197 | 89ff748d | Thomas Thrainer | base.ThrowError("Not enough free space: required %s,"
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198 | 89ff748d | Thomas Thrainer | " available %s", size, free_size)
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199 | 63c73073 | Bernardo Dal Seno | |
200 | fecbe9d5 | Iustin Pop | # If the free space is not well distributed, we won't be able to
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201 | fecbe9d5 | Iustin Pop | # create an optimally-striped volume; in that case, we want to try
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202 | fecbe9d5 | Iustin Pop | # with N, N-1, ..., 2, and finally 1 (non-stripped) number of
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203 | fecbe9d5 | Iustin Pop | # stripes
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204 | 63c73073 | Bernardo Dal Seno | cmd = ["lvcreate", "-L%dm" % size, "-n%s" % lv_name] |
205 | fecbe9d5 | Iustin Pop | for stripes_arg in range(stripes, 0, -1): |
206 | fecbe9d5 | Iustin Pop | result = utils.RunCmd(cmd + ["-i%d" % stripes_arg] + [vg_name] + pvlist)
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207 | fecbe9d5 | Iustin Pop | if not result.failed: |
208 | fecbe9d5 | Iustin Pop | break
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209 | a8083063 | Iustin Pop | if result.failed:
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210 | 89ff748d | Thomas Thrainer | base.ThrowError("LV create failed (%s): %s",
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211 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
212 | bddc92ee | Klaus Aehlig | return LogicalVolume(unique_id, children, size, params, dyn_params, *args)
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213 | a8083063 | Iustin Pop | |
214 | a8083063 | Iustin Pop | @staticmethod
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215 | 197478f2 | René Nussbaumer | def _GetVolumeInfo(lvm_cmd, fields): |
216 | 511e00b8 | Helga Velroyen | """Returns LVM Volume infos using lvm_cmd
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217 | 197478f2 | René Nussbaumer |
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218 | 197478f2 | René Nussbaumer | @param lvm_cmd: Should be one of "pvs", "vgs" or "lvs"
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219 | 197478f2 | René Nussbaumer | @param fields: Fields to return
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220 | 197478f2 | René Nussbaumer | @return: A list of dicts each with the parsed fields
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221 | 197478f2 | René Nussbaumer |
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222 | 197478f2 | René Nussbaumer | """
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223 | 197478f2 | René Nussbaumer | if not fields: |
224 | 197478f2 | René Nussbaumer | raise errors.ProgrammerError("No fields specified") |
225 | 197478f2 | René Nussbaumer | |
226 | 197478f2 | René Nussbaumer | sep = "|"
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227 | 197478f2 | René Nussbaumer | cmd = [lvm_cmd, "--noheadings", "--nosuffix", "--units=m", "--unbuffered", |
228 | 197478f2 | René Nussbaumer | "--separator=%s" % sep, "-o%s" % ",".join(fields)] |
229 | 197478f2 | René Nussbaumer | |
230 | 197478f2 | René Nussbaumer | result = utils.RunCmd(cmd) |
231 | 197478f2 | René Nussbaumer | if result.failed:
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232 | 197478f2 | René Nussbaumer | raise errors.CommandError("Can't get the volume information: %s - %s" % |
233 | 197478f2 | René Nussbaumer | (result.fail_reason, result.output)) |
234 | 197478f2 | René Nussbaumer | |
235 | 197478f2 | René Nussbaumer | data = [] |
236 | 197478f2 | René Nussbaumer | for line in result.stdout.splitlines(): |
237 | 197478f2 | René Nussbaumer | splitted_fields = line.strip().split(sep) |
238 | 197478f2 | René Nussbaumer | |
239 | 197478f2 | René Nussbaumer | if len(fields) != len(splitted_fields): |
240 | 197478f2 | René Nussbaumer | raise errors.CommandError("Can't parse %s output: line '%s'" % |
241 | 197478f2 | René Nussbaumer | (lvm_cmd, line)) |
242 | 197478f2 | René Nussbaumer | |
243 | 197478f2 | René Nussbaumer | data.append(splitted_fields) |
244 | 197478f2 | René Nussbaumer | |
245 | 197478f2 | René Nussbaumer | return data
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246 | 197478f2 | René Nussbaumer | |
247 | 197478f2 | René Nussbaumer | @classmethod
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248 | b496abdb | Bernardo Dal Seno | def GetPVInfo(cls, vg_names, filter_allocatable=True, include_lvs=False): |
249 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
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250 | a8083063 | Iustin Pop |
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251 | 2070598f | Iustin Pop | @param vg_names: list of volume group names, if empty all will be returned
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252 | 2070598f | Iustin Pop | @param filter_allocatable: whether to skip over unallocatable PVs
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253 | b496abdb | Bernardo Dal Seno | @param include_lvs: whether to include a list of LVs hosted on each PV
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254 | a8083063 | Iustin Pop |
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255 | c41eea6e | Iustin Pop | @rtype: list
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256 | 59726e15 | Bernardo Dal Seno | @return: list of objects.LvmPvInfo objects
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257 | 098c0958 | Michael Hanselmann |
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258 | a8083063 | Iustin Pop | """
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259 | b496abdb | Bernardo Dal Seno | # We request "lv_name" field only if we care about LVs, so we don't get
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260 | b496abdb | Bernardo Dal Seno | # a long list of entries with many duplicates unless we really have to.
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261 | b496abdb | Bernardo Dal Seno | # The duplicate "pv_name" field will be ignored.
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262 | b496abdb | Bernardo Dal Seno | if include_lvs:
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263 | b496abdb | Bernardo Dal Seno | lvfield = "lv_name"
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264 | b496abdb | Bernardo Dal Seno | else:
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265 | b496abdb | Bernardo Dal Seno | lvfield = "pv_name"
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266 | 197478f2 | René Nussbaumer | try:
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267 | 197478f2 | René Nussbaumer | info = cls._GetVolumeInfo("pvs", ["pv_name", "vg_name", "pv_free", |
268 | b496abdb | Bernardo Dal Seno | "pv_attr", "pv_size", lvfield]) |
269 | 197478f2 | René Nussbaumer | except errors.GenericError, err:
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270 | 197478f2 | René Nussbaumer | logging.error("Can't get PV information: %s", err)
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271 | a8083063 | Iustin Pop | return None |
272 | 197478f2 | René Nussbaumer | |
273 | b496abdb | Bernardo Dal Seno | # When asked for LVs, "pvs" may return multiple entries for the same PV-LV
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274 | b496abdb | Bernardo Dal Seno | # pair. We sort entries by PV name and then LV name, so it's easy to weed
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275 | b496abdb | Bernardo Dal Seno | # out duplicates.
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276 | b496abdb | Bernardo Dal Seno | if include_lvs:
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277 | b496abdb | Bernardo Dal Seno | info.sort(key=(lambda i: (i[0], i[5]))) |
278 | a8083063 | Iustin Pop | data = [] |
279 | b496abdb | Bernardo Dal Seno | lastpvi = None
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280 | b496abdb | Bernardo Dal Seno | for (pv_name, vg_name, pv_free, pv_attr, pv_size, lv_name) in info: |
281 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not allocatable
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282 | 197478f2 | René Nussbaumer | if filter_allocatable and pv_attr[0] != "a": |
283 | a8083063 | Iustin Pop | continue
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284 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not in the right volume group(s)
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285 | 197478f2 | René Nussbaumer | if vg_names and vg_name not in vg_names: |
286 | 2070598f | Iustin Pop | continue
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287 | b496abdb | Bernardo Dal Seno | # Beware of duplicates (check before inserting)
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288 | b496abdb | Bernardo Dal Seno | if lastpvi and lastpvi.name == pv_name: |
289 | b496abdb | Bernardo Dal Seno | if include_lvs and lv_name: |
290 | b496abdb | Bernardo Dal Seno | if not lastpvi.lv_list or lastpvi.lv_list[-1] != lv_name: |
291 | b496abdb | Bernardo Dal Seno | lastpvi.lv_list.append(lv_name) |
292 | b496abdb | Bernardo Dal Seno | else:
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293 | b496abdb | Bernardo Dal Seno | if include_lvs and lv_name: |
294 | b496abdb | Bernardo Dal Seno | lvl = [lv_name] |
295 | b496abdb | Bernardo Dal Seno | else:
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296 | b496abdb | Bernardo Dal Seno | lvl = [] |
297 | b496abdb | Bernardo Dal Seno | lastpvi = objects.LvmPvInfo(name=pv_name, vg_name=vg_name, |
298 | b496abdb | Bernardo Dal Seno | size=float(pv_size), free=float(pv_free), |
299 | b496abdb | Bernardo Dal Seno | attributes=pv_attr, lv_list=lvl) |
300 | b496abdb | Bernardo Dal Seno | data.append(lastpvi) |
301 | 197478f2 | René Nussbaumer | |
302 | 197478f2 | René Nussbaumer | return data
|
303 | 197478f2 | René Nussbaumer | |
304 | 197478f2 | René Nussbaumer | @classmethod
|
305 | a1860404 | Bernardo Dal Seno | def _GetRawFreePvInfo(cls, vg_name): |
306 | a1860404 | Bernardo Dal Seno | """Return info (size/free) about PVs.
|
307 | a1860404 | Bernardo Dal Seno |
|
308 | a1860404 | Bernardo Dal Seno | @type vg_name: string
|
309 | a1860404 | Bernardo Dal Seno | @param vg_name: VG name
|
310 | a1860404 | Bernardo Dal Seno | @rtype: tuple
|
311 | a1860404 | Bernardo Dal Seno | @return: (standard_pv_size_in_MiB, number_of_free_pvs, total_number_of_pvs)
|
312 | a1860404 | Bernardo Dal Seno |
|
313 | a1860404 | Bernardo Dal Seno | """
|
314 | a1860404 | Bernardo Dal Seno | pvs_info = cls.GetPVInfo([vg_name]) |
315 | a1860404 | Bernardo Dal Seno | if not pvs_info: |
316 | a1860404 | Bernardo Dal Seno | pv_size = 0.0
|
317 | a1860404 | Bernardo Dal Seno | free_pvs = 0
|
318 | a1860404 | Bernardo Dal Seno | num_pvs = 0
|
319 | a1860404 | Bernardo Dal Seno | else:
|
320 | a1860404 | Bernardo Dal Seno | pv_size = cls._GetStdPvSize(pvs_info) |
321 | a1860404 | Bernardo Dal Seno | free_pvs = len(cls._GetEmptyPvNames(pvs_info))
|
322 | a1860404 | Bernardo Dal Seno | num_pvs = len(pvs_info)
|
323 | a1860404 | Bernardo Dal Seno | return (pv_size, free_pvs, num_pvs)
|
324 | a1860404 | Bernardo Dal Seno | |
325 | a1860404 | Bernardo Dal Seno | @classmethod
|
326 | 61481c52 | Bernardo Dal Seno | def _GetExclusiveStorageVgFree(cls, vg_name): |
327 | 61481c52 | Bernardo Dal Seno | """Return the free disk space in the given VG, in exclusive storage mode.
|
328 | 61481c52 | Bernardo Dal Seno |
|
329 | 61481c52 | Bernardo Dal Seno | @type vg_name: string
|
330 | 61481c52 | Bernardo Dal Seno | @param vg_name: VG name
|
331 | 61481c52 | Bernardo Dal Seno | @rtype: float
|
332 | 61481c52 | Bernardo Dal Seno | @return: free space in MiB
|
333 | 61481c52 | Bernardo Dal Seno | """
|
334 | a1860404 | Bernardo Dal Seno | (pv_size, free_pvs, _) = cls._GetRawFreePvInfo(vg_name) |
335 | a1860404 | Bernardo Dal Seno | return pv_size * free_pvs
|
336 | a1860404 | Bernardo Dal Seno | |
337 | a1860404 | Bernardo Dal Seno | @classmethod
|
338 | a1860404 | Bernardo Dal Seno | def GetVgSpindlesInfo(cls, vg_name): |
339 | a1860404 | Bernardo Dal Seno | """Get the free space info for specific VGs.
|
340 | a1860404 | Bernardo Dal Seno |
|
341 | a1860404 | Bernardo Dal Seno | @param vg_name: volume group name
|
342 | a1860404 | Bernardo Dal Seno | @rtype: tuple
|
343 | a1860404 | Bernardo Dal Seno | @return: (free_spindles, total_spindles)
|
344 | a1860404 | Bernardo Dal Seno |
|
345 | a1860404 | Bernardo Dal Seno | """
|
346 | a1860404 | Bernardo Dal Seno | (_, free_pvs, num_pvs) = cls._GetRawFreePvInfo(vg_name) |
347 | a1860404 | Bernardo Dal Seno | return (free_pvs, num_pvs)
|
348 | 61481c52 | Bernardo Dal Seno | |
349 | 61481c52 | Bernardo Dal Seno | @classmethod
|
350 | 1a3c5d4e | Bernardo Dal Seno | def GetVGInfo(cls, vg_names, excl_stor, filter_readonly=True): |
351 | 197478f2 | René Nussbaumer | """Get the free space info for specific VGs.
|
352 | 197478f2 | René Nussbaumer |
|
353 | 197478f2 | René Nussbaumer | @param vg_names: list of volume group names, if empty all will be returned
|
354 | 1a3c5d4e | Bernardo Dal Seno | @param excl_stor: whether exclusive_storage is enabled
|
355 | 197478f2 | René Nussbaumer | @param filter_readonly: whether to skip over readonly VGs
|
356 | 197478f2 | René Nussbaumer |
|
357 | 197478f2 | René Nussbaumer | @rtype: list
|
358 | 673cd9c4 | René Nussbaumer | @return: list of tuples (free_space, total_size, name) with free_space in
|
359 | 673cd9c4 | René Nussbaumer | MiB
|
360 | 197478f2 | René Nussbaumer |
|
361 | 197478f2 | René Nussbaumer | """
|
362 | 197478f2 | René Nussbaumer | try:
|
363 | 673cd9c4 | René Nussbaumer | info = cls._GetVolumeInfo("vgs", ["vg_name", "vg_free", "vg_attr", |
364 | 673cd9c4 | René Nussbaumer | "vg_size"])
|
365 | 197478f2 | René Nussbaumer | except errors.GenericError, err:
|
366 | 197478f2 | René Nussbaumer | logging.error("Can't get VG information: %s", err)
|
367 | 197478f2 | René Nussbaumer | return None |
368 | 197478f2 | René Nussbaumer | |
369 | 197478f2 | René Nussbaumer | data = [] |
370 | 673cd9c4 | René Nussbaumer | for vg_name, vg_free, vg_attr, vg_size in info: |
371 | 197478f2 | René Nussbaumer | # (possibly) skip over vgs which are not writable
|
372 | 197478f2 | René Nussbaumer | if filter_readonly and vg_attr[0] == "r": |
373 | 197478f2 | René Nussbaumer | continue
|
374 | 197478f2 | René Nussbaumer | # (possibly) skip over vgs which are not in the right volume group(s)
|
375 | 197478f2 | René Nussbaumer | if vg_names and vg_name not in vg_names: |
376 | 197478f2 | René Nussbaumer | continue
|
377 | 61481c52 | Bernardo Dal Seno | # Exclusive storage needs a different concept of free space
|
378 | 61481c52 | Bernardo Dal Seno | if excl_stor:
|
379 | 61481c52 | Bernardo Dal Seno | es_free = cls._GetExclusiveStorageVgFree(vg_name) |
380 | 61481c52 | Bernardo Dal Seno | assert es_free <= vg_free
|
381 | 61481c52 | Bernardo Dal Seno | vg_free = es_free |
382 | 673cd9c4 | René Nussbaumer | data.append((float(vg_free), float(vg_size), vg_name)) |
383 | a8083063 | Iustin Pop | |
384 | a8083063 | Iustin Pop | return data
|
385 | a8083063 | Iustin Pop | |
386 | 6136f8f0 | Iustin Pop | @classmethod
|
387 | 6136f8f0 | Iustin Pop | def _ValidateName(cls, name): |
388 | 6136f8f0 | Iustin Pop | """Validates that a given name is valid as VG or LV name.
|
389 | 6136f8f0 | Iustin Pop |
|
390 | 6136f8f0 | Iustin Pop | The list of valid characters and restricted names is taken out of
|
391 | 6136f8f0 | Iustin Pop | the lvm(8) manpage, with the simplification that we enforce both
|
392 | 6136f8f0 | Iustin Pop | VG and LV restrictions on the names.
|
393 | 6136f8f0 | Iustin Pop |
|
394 | 6136f8f0 | Iustin Pop | """
|
395 | 6136f8f0 | Iustin Pop | if (not cls._VALID_NAME_RE.match(name) or |
396 | 6136f8f0 | Iustin Pop | name in cls._INVALID_NAMES or |
397 | 403f5172 | Guido Trotter | compat.any(substring in name for substring in cls._INVALID_SUBSTRINGS)): |
398 | 89ff748d | Thomas Thrainer | base.ThrowError("Invalid LVM name '%s'", name)
|
399 | 6136f8f0 | Iustin Pop | |
400 | a8083063 | Iustin Pop | def Remove(self): |
401 | a8083063 | Iustin Pop | """Remove this logical volume.
|
402 | a8083063 | Iustin Pop |
|
403 | a8083063 | Iustin Pop | """
|
404 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
405 | a8083063 | Iustin Pop | # the LV does not exist
|
406 | 0c6c04ec | Iustin Pop | return
|
407 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
408 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
409 | a8083063 | Iustin Pop | if result.failed:
|
410 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't lvremove: %s - %s",
|
411 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
412 | a8083063 | Iustin Pop | |
413 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
414 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
415 | f3e513ad | Iustin Pop |
|
416 | f3e513ad | Iustin Pop | """
|
417 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
418 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
419 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
420 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
421 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
422 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
423 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
424 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
425 | f3e513ad | Iustin Pop | if result.failed:
|
426 | 89ff748d | Thomas Thrainer | base.ThrowError("Failed to rename the logical volume: %s", result.output)
|
427 | be345db0 | Iustin Pop | self._lv_name = new_name
|
428 | 6136f8f0 | Iustin Pop | self.dev_path = utils.PathJoin("/dev", self._vg_name, self._lv_name) |
429 | be345db0 | Iustin Pop | |
430 | 688b5752 | Bernardo Dal Seno | @classmethod
|
431 | 688b5752 | Bernardo Dal Seno | def _ParseLvInfoLine(cls, line, sep): |
432 | 688b5752 | Bernardo Dal Seno | """Parse one line of the lvs output used in L{_GetLvInfo}.
|
433 | a8083063 | Iustin Pop |
|
434 | a8083063 | Iustin Pop | """
|
435 | 688b5752 | Bernardo Dal Seno | elems = line.strip().rstrip(sep).split(sep) |
436 | b5d48e87 | Bernardo Dal Seno | if len(elems) != 6: |
437 | b5d48e87 | Bernardo Dal Seno | base.ThrowError("Can't parse LVS output, len(%s) != 6", str(elems)) |
438 | 99e8295c | Iustin Pop | |
439 | b5d48e87 | Bernardo Dal Seno | (status, major, minor, pe_size, stripes, pvs) = elems |
440 | 0304f0ec | Iustin Pop | if len(status) < 6: |
441 | 688b5752 | Bernardo Dal Seno | base.ThrowError("lvs lv_attr is not at least 6 characters (%s)", status)
|
442 | 99e8295c | Iustin Pop | |
443 | 99e8295c | Iustin Pop | try:
|
444 | 99e8295c | Iustin Pop | major = int(major)
|
445 | 99e8295c | Iustin Pop | minor = int(minor)
|
446 | 691744c4 | Iustin Pop | except (TypeError, ValueError), err: |
447 | 688b5752 | Bernardo Dal Seno | base.ThrowError("lvs major/minor cannot be parsed: %s", str(err)) |
448 | 99e8295c | Iustin Pop | |
449 | 38256320 | Iustin Pop | try:
|
450 | 38256320 | Iustin Pop | pe_size = int(float(pe_size)) |
451 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
452 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't parse vg extent size: %s", err)
|
453 | 38256320 | Iustin Pop | |
454 | 38256320 | Iustin Pop | try:
|
455 | 38256320 | Iustin Pop | stripes = int(stripes)
|
456 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
457 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't parse the number of stripes: %s", err)
|
458 | 688b5752 | Bernardo Dal Seno | |
459 | b5d48e87 | Bernardo Dal Seno | pv_names = [] |
460 | b5d48e87 | Bernardo Dal Seno | for pv in pvs.split(","): |
461 | b5d48e87 | Bernardo Dal Seno | m = re.match(cls._PARSE_PV_DEV_RE, pv) |
462 | b5d48e87 | Bernardo Dal Seno | if not m: |
463 | b5d48e87 | Bernardo Dal Seno | base.ThrowError("Can't parse this device list: %s", pvs)
|
464 | b5d48e87 | Bernardo Dal Seno | pv_names.append(m.group(1))
|
465 | b5d48e87 | Bernardo Dal Seno | assert len(pv_names) > 0 |
466 | b5d48e87 | Bernardo Dal Seno | |
467 | b5d48e87 | Bernardo Dal Seno | return (status, major, minor, pe_size, stripes, pv_names)
|
468 | 688b5752 | Bernardo Dal Seno | |
469 | 688b5752 | Bernardo Dal Seno | @classmethod
|
470 | 688b5752 | Bernardo Dal Seno | def _GetLvInfo(cls, dev_path, _run_cmd=utils.RunCmd): |
471 | 688b5752 | Bernardo Dal Seno | """Get info about the given existing LV to be used.
|
472 | 688b5752 | Bernardo Dal Seno |
|
473 | 688b5752 | Bernardo Dal Seno | """
|
474 | b5d48e87 | Bernardo Dal Seno | sep = "|"
|
475 | b5d48e87 | Bernardo Dal Seno | result = _run_cmd(["lvs", "--noheadings", "--separator=%s" % sep, |
476 | 688b5752 | Bernardo Dal Seno | "--units=k", "--nosuffix", |
477 | 688b5752 | Bernardo Dal Seno | "-olv_attr,lv_kernel_major,lv_kernel_minor,"
|
478 | b5d48e87 | Bernardo Dal Seno | "vg_extent_size,stripes,devices", dev_path])
|
479 | 688b5752 | Bernardo Dal Seno | if result.failed:
|
480 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't find LV %s: %s, %s",
|
481 | 688b5752 | Bernardo Dal Seno | dev_path, result.fail_reason, result.output) |
482 | 688b5752 | Bernardo Dal Seno | # the output can (and will) have multiple lines for multi-segment
|
483 | 688b5752 | Bernardo Dal Seno | # LVs, as the 'stripes' parameter is a segment one, so we take
|
484 | 688b5752 | Bernardo Dal Seno | # only the last entry, which is the one we're interested in; note
|
485 | 688b5752 | Bernardo Dal Seno | # that with LVM2 anyway the 'stripes' value must be constant
|
486 | 688b5752 | Bernardo Dal Seno | # across segments, so this is a no-op actually
|
487 | 688b5752 | Bernardo Dal Seno | out = result.stdout.splitlines() |
488 | 688b5752 | Bernardo Dal Seno | if not out: # totally empty result? splitlines() returns at least |
489 | 688b5752 | Bernardo Dal Seno | # one line for any non-empty string
|
490 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't parse LVS output, no lines? Got '%s'", str(out)) |
491 | b5d48e87 | Bernardo Dal Seno | pv_names = set()
|
492 | b5d48e87 | Bernardo Dal Seno | for line in out: |
493 | b5d48e87 | Bernardo Dal Seno | (status, major, minor, pe_size, stripes, more_pvs) = \ |
494 | b5d48e87 | Bernardo Dal Seno | cls._ParseLvInfoLine(line, sep) |
495 | b5d48e87 | Bernardo Dal Seno | pv_names.update(more_pvs) |
496 | b5d48e87 | Bernardo Dal Seno | return (status, major, minor, pe_size, stripes, pv_names)
|
497 | 688b5752 | Bernardo Dal Seno | |
498 | 688b5752 | Bernardo Dal Seno | def Attach(self): |
499 | 688b5752 | Bernardo Dal Seno | """Attach to an existing LV.
|
500 | 688b5752 | Bernardo Dal Seno |
|
501 | 688b5752 | Bernardo Dal Seno | This method will try to see if an existing and active LV exists
|
502 | 688b5752 | Bernardo Dal Seno | which matches our name. If so, its major/minor will be
|
503 | 688b5752 | Bernardo Dal Seno | recorded.
|
504 | 688b5752 | Bernardo Dal Seno |
|
505 | 688b5752 | Bernardo Dal Seno | """
|
506 | 688b5752 | Bernardo Dal Seno | self.attached = False |
507 | 688b5752 | Bernardo Dal Seno | try:
|
508 | b5d48e87 | Bernardo Dal Seno | (status, major, minor, pe_size, stripes, pv_names) = \ |
509 | 688b5752 | Bernardo Dal Seno | self._GetLvInfo(self.dev_path) |
510 | 688b5752 | Bernardo Dal Seno | except errors.BlockDeviceError:
|
511 | 38256320 | Iustin Pop | return False |
512 | 38256320 | Iustin Pop | |
513 | 99e8295c | Iustin Pop | self.major = major
|
514 | 99e8295c | Iustin Pop | self.minor = minor
|
515 | 38256320 | Iustin Pop | self.pe_size = pe_size
|
516 | 38256320 | Iustin Pop | self.stripe_count = stripes
|
517 | d0c8c01d | Iustin Pop | self._degraded = status[0] == "v" # virtual volume, i.e. doesn't backing |
518 | 99e8295c | Iustin Pop | # storage
|
519 | b5d48e87 | Bernardo Dal Seno | self.pv_names = pv_names
|
520 | cb999543 | Iustin Pop | self.attached = True |
521 | 99e8295c | Iustin Pop | return True |
522 | a8083063 | Iustin Pop | |
523 | a8083063 | Iustin Pop | def Assemble(self): |
524 | a8083063 | Iustin Pop | """Assemble the device.
|
525 | a8083063 | Iustin Pop |
|
526 | 5bbd3f7f | Michael Hanselmann | We always run `lvchange -ay` on the LV to ensure it's active before
|
527 | 5574047a | Iustin Pop | use, as there were cases when xenvg was not active after boot
|
528 | 5574047a | Iustin Pop | (also possibly after disk issues).
|
529 | a8083063 | Iustin Pop |
|
530 | a8083063 | Iustin Pop | """
|
531 | 5574047a | Iustin Pop | result = utils.RunCmd(["lvchange", "-ay", self.dev_path]) |
532 | 5574047a | Iustin Pop | if result.failed:
|
533 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't activate lv %s: %s", self.dev_path, result.output) |
534 | a8083063 | Iustin Pop | |
535 | a8083063 | Iustin Pop | def Shutdown(self): |
536 | a8083063 | Iustin Pop | """Shutdown the device.
|
537 | a8083063 | Iustin Pop |
|
538 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
539 | a8083063 | Iustin Pop | volumes on shutdown.
|
540 | a8083063 | Iustin Pop |
|
541 | a8083063 | Iustin Pop | """
|
542 | 746f7476 | Iustin Pop | pass
|
543 | a8083063 | Iustin Pop | |
544 | 9db6dbce | Iustin Pop | def GetSyncStatus(self): |
545 | 9db6dbce | Iustin Pop | """Returns the sync status of the device.
|
546 | 9db6dbce | Iustin Pop |
|
547 | 9db6dbce | Iustin Pop | If this device is a mirroring device, this function returns the
|
548 | 9db6dbce | Iustin Pop | status of the mirror.
|
549 | 9db6dbce | Iustin Pop |
|
550 | 9db6dbce | Iustin Pop | For logical volumes, sync_percent and estimated_time are always
|
551 | 9db6dbce | Iustin Pop | None (no recovery in progress, as we don't handle the mirrored LV
|
552 | 0834c866 | Iustin Pop | case). The is_degraded parameter is the inverse of the ldisk
|
553 | 0834c866 | Iustin Pop | parameter.
|
554 | 9db6dbce | Iustin Pop |
|
555 | 0834c866 | Iustin Pop | For the ldisk parameter, we check if the logical volume has the
|
556 | 0834c866 | Iustin Pop | 'virtual' type, which means it's not backed by existing storage
|
557 | 0834c866 | Iustin Pop | anymore (read from it return I/O error). This happens after a
|
558 | 0834c866 | Iustin Pop | physical disk failure and subsequent 'vgreduce --removemissing' on
|
559 | 0834c866 | Iustin Pop | the volume group.
|
560 | 9db6dbce | Iustin Pop |
|
561 | 99e8295c | Iustin Pop | The status was already read in Attach, so we just return it.
|
562 | 99e8295c | Iustin Pop |
|
563 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
564 | c41eea6e | Iustin Pop |
|
565 | 9db6dbce | Iustin Pop | """
|
566 | f208978a | Michael Hanselmann | if self._degraded: |
567 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_FAULTY |
568 | f208978a | Michael Hanselmann | else:
|
569 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_OKAY |
570 | f208978a | Michael Hanselmann | |
571 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
572 | 96acbc09 | Michael Hanselmann | major=self.major,
|
573 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
574 | 96acbc09 | Michael Hanselmann | sync_percent=None,
|
575 | 96acbc09 | Michael Hanselmann | estimated_time=None,
|
576 | 96acbc09 | Michael Hanselmann | is_degraded=self._degraded,
|
577 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
578 | 9db6dbce | Iustin Pop | |
579 | a8083063 | Iustin Pop | def Open(self, force=False): |
580 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
581 | a8083063 | Iustin Pop |
|
582 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
583 | a8083063 | Iustin Pop |
|
584 | a8083063 | Iustin Pop | """
|
585 | fdbd668d | Iustin Pop | pass
|
586 | a8083063 | Iustin Pop | |
587 | a8083063 | Iustin Pop | def Close(self): |
588 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
589 | a8083063 | Iustin Pop |
|
590 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
591 | a8083063 | Iustin Pop |
|
592 | a8083063 | Iustin Pop | """
|
593 | fdbd668d | Iustin Pop | pass
|
594 | a8083063 | Iustin Pop | |
595 | a8083063 | Iustin Pop | def Snapshot(self, size): |
596 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
597 | a8083063 | Iustin Pop |
|
598 | 800ac399 | Iustin Pop | @returns: tuple (vg, lv)
|
599 | 800ac399 | Iustin Pop |
|
600 | a8083063 | Iustin Pop | """
|
601 | a8083063 | Iustin Pop | snap_name = self._lv_name + ".snap" |
602 | a8083063 | Iustin Pop | |
603 | a8083063 | Iustin Pop | # remove existing snapshot if found
|
604 | 0c3d9c7c | Thomas Thrainer | snap = LogicalVolume((self._vg_name, snap_name), None, size, self.params, |
605 | 0c3d9c7c | Thomas Thrainer | self.dyn_params)
|
606 | 89ff748d | Thomas Thrainer | base.IgnoreError(snap.Remove) |
607 | a8083063 | Iustin Pop | |
608 | 1a3c5d4e | Bernardo Dal Seno | vg_info = self.GetVGInfo([self._vg_name], False) |
609 | 197478f2 | René Nussbaumer | if not vg_info: |
610 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't compute VG info for vg %s", self._vg_name) |
611 | 673cd9c4 | René Nussbaumer | free_size, _, _ = vg_info[0]
|
612 | a8083063 | Iustin Pop | if free_size < size:
|
613 | 89ff748d | Thomas Thrainer | base.ThrowError("Not enough free space: required %s,"
|
614 | 89ff748d | Thomas Thrainer | " available %s", size, free_size)
|
615 | a8083063 | Iustin Pop | |
616 | e398546b | Iustin Pop | _CheckResult(utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
617 | e398546b | Iustin Pop | "-n%s" % snap_name, self.dev_path])) |
618 | a8083063 | Iustin Pop | |
619 | 800ac399 | Iustin Pop | return (self._vg_name, snap_name) |
620 | a8083063 | Iustin Pop | |
621 | a1556cfa | Iustin Pop | def _RemoveOldInfo(self): |
622 | a1556cfa | Iustin Pop | """Try to remove old tags from the lv.
|
623 | a1556cfa | Iustin Pop |
|
624 | a1556cfa | Iustin Pop | """
|
625 | a1556cfa | Iustin Pop | result = utils.RunCmd(["lvs", "-o", "tags", "--noheadings", "--nosuffix", |
626 | a1556cfa | Iustin Pop | self.dev_path])
|
627 | a1556cfa | Iustin Pop | _CheckResult(result) |
628 | a1556cfa | Iustin Pop | |
629 | a1556cfa | Iustin Pop | raw_tags = result.stdout.strip() |
630 | a1556cfa | Iustin Pop | if raw_tags:
|
631 | a1556cfa | Iustin Pop | for tag in raw_tags.split(","): |
632 | a1556cfa | Iustin Pop | _CheckResult(utils.RunCmd(["lvchange", "--deltag", |
633 | a1556cfa | Iustin Pop | tag.strip(), self.dev_path]))
|
634 | a1556cfa | Iustin Pop | |
635 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
636 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
637 | a0c3fea1 | Michael Hanselmann |
|
638 | a0c3fea1 | Michael Hanselmann | """
|
639 | 89ff748d | Thomas Thrainer | base.BlockDev.SetInfo(self, text)
|
640 | a0c3fea1 | Michael Hanselmann | |
641 | a1556cfa | Iustin Pop | self._RemoveOldInfo()
|
642 | a1556cfa | Iustin Pop | |
643 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
644 | d0c8c01d | Iustin Pop | text = re.sub("^[^A-Za-z0-9_+.]", "_", text) |
645 | d0c8c01d | Iustin Pop | text = re.sub("[^-A-Za-z0-9_+.]", "_", text) |
646 | a0c3fea1 | Michael Hanselmann | |
647 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
648 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
649 | a0c3fea1 | Michael Hanselmann | |
650 | e398546b | Iustin Pop | _CheckResult(utils.RunCmd(["lvchange", "--addtag", text, self.dev_path])) |
651 | 82463074 | Iustin Pop | |
652 | c31ec06b | Bernardo Dal Seno | def _GetGrowthAvaliabilityExclStor(self): |
653 | c31ec06b | Bernardo Dal Seno | """Return how much the disk can grow with exclusive storage.
|
654 | c31ec06b | Bernardo Dal Seno |
|
655 | c31ec06b | Bernardo Dal Seno | @rtype: float
|
656 | c31ec06b | Bernardo Dal Seno | @return: available space in Mib
|
657 | c31ec06b | Bernardo Dal Seno |
|
658 | c31ec06b | Bernardo Dal Seno | """
|
659 | c31ec06b | Bernardo Dal Seno | pvs_info = self.GetPVInfo([self._vg_name]) |
660 | c31ec06b | Bernardo Dal Seno | if not pvs_info: |
661 | c31ec06b | Bernardo Dal Seno | base.ThrowError("Cannot get information about PVs for %s", self.dev_path) |
662 | c31ec06b | Bernardo Dal Seno | std_pv_size = self._GetStdPvSize(pvs_info)
|
663 | c31ec06b | Bernardo Dal Seno | free_space = sum(pvi.free - (pvi.size - std_pv_size)
|
664 | c31ec06b | Bernardo Dal Seno | for pvi in pvs_info |
665 | c31ec06b | Bernardo Dal Seno | if pvi.name in self.pv_names) |
666 | c31ec06b | Bernardo Dal Seno | return free_space
|
667 | c31ec06b | Bernardo Dal Seno | |
668 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
669 | 1005d816 | Iustin Pop | """Grow the logical volume.
|
670 | 1005d816 | Iustin Pop |
|
671 | 1005d816 | Iustin Pop | """
|
672 | cad0723b | Iustin Pop | if not backingstore: |
673 | cad0723b | Iustin Pop | return
|
674 | 38256320 | Iustin Pop | if self.pe_size is None or self.stripe_count is None: |
675 | 38256320 | Iustin Pop | if not self.Attach(): |
676 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't attach to LV during Grow()")
|
677 | 38256320 | Iustin Pop | full_stripe_size = self.pe_size * self.stripe_count |
678 | 5519f036 | Bernardo Dal Seno | # pe_size is in KB
|
679 | 5519f036 | Bernardo Dal Seno | amount *= 1024
|
680 | 38256320 | Iustin Pop | rest = amount % full_stripe_size |
681 | 38256320 | Iustin Pop | if rest != 0: |
682 | 38256320 | Iustin Pop | amount += full_stripe_size - rest |
683 | 5519f036 | Bernardo Dal Seno | cmd = ["lvextend", "-L", "+%dk" % amount] |
684 | 7fe23d47 | Iustin Pop | if dryrun:
|
685 | 7fe23d47 | Iustin Pop | cmd.append("--test")
|
686 | be9150ea | Bernardo Dal Seno | if excl_stor:
|
687 | c31ec06b | Bernardo Dal Seno | free_space = self._GetGrowthAvaliabilityExclStor()
|
688 | c31ec06b | Bernardo Dal Seno | # amount is in KiB, free_space in MiB
|
689 | c31ec06b | Bernardo Dal Seno | if amount > free_space * 1024: |
690 | c31ec06b | Bernardo Dal Seno | base.ThrowError("Not enough free space to grow %s: %d MiB required,"
|
691 | c31ec06b | Bernardo Dal Seno | " %d available", self.dev_path, amount / 1024, |
692 | c31ec06b | Bernardo Dal Seno | free_space) |
693 | be9150ea | Bernardo Dal Seno | # Disk growth doesn't grow the number of spindles, so we must stay within
|
694 | be9150ea | Bernardo Dal Seno | # our assigned volumes
|
695 | be9150ea | Bernardo Dal Seno | pvlist = list(self.pv_names) |
696 | be9150ea | Bernardo Dal Seno | else:
|
697 | be9150ea | Bernardo Dal Seno | pvlist = [] |
698 | 1005d816 | Iustin Pop | # we try multiple algorithms since the 'best' ones might not have
|
699 | 1005d816 | Iustin Pop | # space available in the right place, but later ones might (since
|
700 | 1005d816 | Iustin Pop | # they have less constraints); also note that only recent LVM
|
701 | 1005d816 | Iustin Pop | # supports 'cling'
|
702 | 1005d816 | Iustin Pop | for alloc_policy in "contiguous", "cling", "normal": |
703 | be9150ea | Bernardo Dal Seno | result = utils.RunCmd(cmd + ["--alloc", alloc_policy, self.dev_path] + |
704 | be9150ea | Bernardo Dal Seno | pvlist) |
705 | 1005d816 | Iustin Pop | if not result.failed: |
706 | 1005d816 | Iustin Pop | return
|
707 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't grow LV %s: %s", self.dev_path, result.output) |
708 | a8083063 | Iustin Pop | |
709 | baa7f1d6 | Bernardo Dal Seno | def GetActualSpindles(self): |
710 | baa7f1d6 | Bernardo Dal Seno | """Return the number of spindles used.
|
711 | baa7f1d6 | Bernardo Dal Seno |
|
712 | baa7f1d6 | Bernardo Dal Seno | """
|
713 | baa7f1d6 | Bernardo Dal Seno | assert self.attached, "BlockDevice not attached in GetActualSpindles()" |
714 | baa7f1d6 | Bernardo Dal Seno | return len(self.pv_names) |
715 | baa7f1d6 | Bernardo Dal Seno | |
716 | a2cfdea2 | Iustin Pop | |
717 | 89ff748d | Thomas Thrainer | class PersistentBlockDevice(base.BlockDev): |
718 | b6135bbc | Apollon Oikonomopoulos | """A block device with persistent node
|
719 | b6135bbc | Apollon Oikonomopoulos |
|
720 | b6135bbc | Apollon Oikonomopoulos | May be either directly attached, or exposed through DM (e.g. dm-multipath).
|
721 | b6135bbc | Apollon Oikonomopoulos | udev helpers are probably required to give persistent, human-friendly
|
722 | b6135bbc | Apollon Oikonomopoulos | names.
|
723 | b6135bbc | Apollon Oikonomopoulos |
|
724 | b6135bbc | Apollon Oikonomopoulos | For the time being, pathnames are required to lie under /dev.
|
725 | b6135bbc | Apollon Oikonomopoulos |
|
726 | b6135bbc | Apollon Oikonomopoulos | """
|
727 | c032b2ce | Klaus Aehlig | def __init__(self, unique_id, children, size, params, dyn_params, *args): |
728 | b6135bbc | Apollon Oikonomopoulos | """Attaches to a static block device.
|
729 | b6135bbc | Apollon Oikonomopoulos |
|
730 | b6135bbc | Apollon Oikonomopoulos | The unique_id is a path under /dev.
|
731 | b6135bbc | Apollon Oikonomopoulos |
|
732 | b6135bbc | Apollon Oikonomopoulos | """
|
733 | 94dcbdb0 | Andrea Spadaccini | super(PersistentBlockDevice, self).__init__(unique_id, children, size, |
734 | c032b2ce | Klaus Aehlig | params, dyn_params, *args) |
735 | b6135bbc | Apollon Oikonomopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
736 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
737 | b6135bbc | Apollon Oikonomopoulos | self.dev_path = unique_id[1] |
738 | d0c8c01d | Iustin Pop | if not os.path.realpath(self.dev_path).startswith("/dev/"): |
739 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Full path '%s' lies outside /dev" % |
740 | b6135bbc | Apollon Oikonomopoulos | os.path.realpath(self.dev_path))
|
741 | b6135bbc | Apollon Oikonomopoulos | # TODO: this is just a safety guard checking that we only deal with devices
|
742 | b6135bbc | Apollon Oikonomopoulos | # we know how to handle. In the future this will be integrated with
|
743 | b6135bbc | Apollon Oikonomopoulos | # external storage backends and possible values will probably be collected
|
744 | b6135bbc | Apollon Oikonomopoulos | # from the cluster configuration.
|
745 | b6135bbc | Apollon Oikonomopoulos | if unique_id[0] != constants.BLOCKDEV_DRIVER_MANUAL: |
746 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Got persistent block device of invalid type: %s" % |
747 | b6135bbc | Apollon Oikonomopoulos | unique_id[0])
|
748 | b6135bbc | Apollon Oikonomopoulos | |
749 | b6135bbc | Apollon Oikonomopoulos | self.major = self.minor = None |
750 | b6135bbc | Apollon Oikonomopoulos | self.Attach()
|
751 | b6135bbc | Apollon Oikonomopoulos | |
752 | b6135bbc | Apollon Oikonomopoulos | @classmethod
|
753 | 0c3d9c7c | Thomas Thrainer | def Create(cls, unique_id, children, size, spindles, params, excl_stor, |
754 | bddc92ee | Klaus Aehlig | dyn_params, *args): |
755 | b6135bbc | Apollon Oikonomopoulos | """Create a new device
|
756 | b6135bbc | Apollon Oikonomopoulos |
|
757 | b6135bbc | Apollon Oikonomopoulos | This is a noop, we only return a PersistentBlockDevice instance
|
758 | b6135bbc | Apollon Oikonomopoulos |
|
759 | b6135bbc | Apollon Oikonomopoulos | """
|
760 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
761 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("Persistent block device requested with" |
762 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
763 | bddc92ee | Klaus Aehlig | return PersistentBlockDevice(unique_id, children, 0, params, dyn_params, |
764 | bddc92ee | Klaus Aehlig | *args) |
765 | b6135bbc | Apollon Oikonomopoulos | |
766 | b6135bbc | Apollon Oikonomopoulos | def Remove(self): |
767 | b6135bbc | Apollon Oikonomopoulos | """Remove a device
|
768 | b6135bbc | Apollon Oikonomopoulos |
|
769 | b6135bbc | Apollon Oikonomopoulos | This is a noop
|
770 | b6135bbc | Apollon Oikonomopoulos |
|
771 | b6135bbc | Apollon Oikonomopoulos | """
|
772 | b6135bbc | Apollon Oikonomopoulos | pass
|
773 | b6135bbc | Apollon Oikonomopoulos | |
774 | b6135bbc | Apollon Oikonomopoulos | def Rename(self, new_id): |
775 | b6135bbc | Apollon Oikonomopoulos | """Rename this device.
|
776 | b6135bbc | Apollon Oikonomopoulos |
|
777 | b6135bbc | Apollon Oikonomopoulos | """
|
778 | 89ff748d | Thomas Thrainer | base.ThrowError("Rename is not supported for PersistentBlockDev storage")
|
779 | b6135bbc | Apollon Oikonomopoulos | |
780 | b6135bbc | Apollon Oikonomopoulos | def Attach(self): |
781 | b6135bbc | Apollon Oikonomopoulos | """Attach to an existing block device.
|
782 | b6135bbc | Apollon Oikonomopoulos |
|
783 | b6135bbc | Apollon Oikonomopoulos |
|
784 | b6135bbc | Apollon Oikonomopoulos | """
|
785 | b6135bbc | Apollon Oikonomopoulos | self.attached = False |
786 | b6135bbc | Apollon Oikonomopoulos | try:
|
787 | b6135bbc | Apollon Oikonomopoulos | st = os.stat(self.dev_path)
|
788 | b6135bbc | Apollon Oikonomopoulos | except OSError, err: |
789 | b6135bbc | Apollon Oikonomopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
790 | b6135bbc | Apollon Oikonomopoulos | return False |
791 | b6135bbc | Apollon Oikonomopoulos | |
792 | b6135bbc | Apollon Oikonomopoulos | if not stat.S_ISBLK(st.st_mode): |
793 | b6135bbc | Apollon Oikonomopoulos | logging.error("%s is not a block device", self.dev_path) |
794 | b6135bbc | Apollon Oikonomopoulos | return False |
795 | b6135bbc | Apollon Oikonomopoulos | |
796 | b6135bbc | Apollon Oikonomopoulos | self.major = os.major(st.st_rdev)
|
797 | b6135bbc | Apollon Oikonomopoulos | self.minor = os.minor(st.st_rdev)
|
798 | b6135bbc | Apollon Oikonomopoulos | self.attached = True |
799 | b6135bbc | Apollon Oikonomopoulos | |
800 | b6135bbc | Apollon Oikonomopoulos | return True |
801 | b6135bbc | Apollon Oikonomopoulos | |
802 | b6135bbc | Apollon Oikonomopoulos | def Assemble(self): |
803 | b6135bbc | Apollon Oikonomopoulos | """Assemble the device.
|
804 | b6135bbc | Apollon Oikonomopoulos |
|
805 | b6135bbc | Apollon Oikonomopoulos | """
|
806 | b6135bbc | Apollon Oikonomopoulos | pass
|
807 | b6135bbc | Apollon Oikonomopoulos | |
808 | b6135bbc | Apollon Oikonomopoulos | def Shutdown(self): |
809 | b6135bbc | Apollon Oikonomopoulos | """Shutdown the device.
|
810 | b6135bbc | Apollon Oikonomopoulos |
|
811 | b6135bbc | Apollon Oikonomopoulos | """
|
812 | b6135bbc | Apollon Oikonomopoulos | pass
|
813 | b6135bbc | Apollon Oikonomopoulos | |
814 | b6135bbc | Apollon Oikonomopoulos | def Open(self, force=False): |
815 | b6135bbc | Apollon Oikonomopoulos | """Make the device ready for I/O.
|
816 | b6135bbc | Apollon Oikonomopoulos |
|
817 | b6135bbc | Apollon Oikonomopoulos | """
|
818 | b6135bbc | Apollon Oikonomopoulos | pass
|
819 | b6135bbc | Apollon Oikonomopoulos | |
820 | b6135bbc | Apollon Oikonomopoulos | def Close(self): |
821 | b6135bbc | Apollon Oikonomopoulos | """Notifies that the device will no longer be used for I/O.
|
822 | b6135bbc | Apollon Oikonomopoulos |
|
823 | b6135bbc | Apollon Oikonomopoulos | """
|
824 | b6135bbc | Apollon Oikonomopoulos | pass
|
825 | b6135bbc | Apollon Oikonomopoulos | |
826 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
827 | b6135bbc | Apollon Oikonomopoulos | """Grow the logical volume.
|
828 | b6135bbc | Apollon Oikonomopoulos |
|
829 | b6135bbc | Apollon Oikonomopoulos | """
|
830 | 89ff748d | Thomas Thrainer | base.ThrowError("Grow is not supported for PersistentBlockDev storage")
|
831 | b6135bbc | Apollon Oikonomopoulos | |
832 | b6135bbc | Apollon Oikonomopoulos | |
833 | 89ff748d | Thomas Thrainer | class RADOSBlockDevice(base.BlockDev): |
834 | 7181fba0 | Constantinos Venetsanopoulos | """A RADOS Block Device (rbd).
|
835 | 7181fba0 | Constantinos Venetsanopoulos |
|
836 | 7181fba0 | Constantinos Venetsanopoulos | This class implements the RADOS Block Device for the backend. You need
|
837 | 7181fba0 | Constantinos Venetsanopoulos | the rbd kernel driver, the RADOS Tools and a working RADOS cluster for
|
838 | 7181fba0 | Constantinos Venetsanopoulos | this to be functional.
|
839 | 7181fba0 | Constantinos Venetsanopoulos |
|
840 | 7181fba0 | Constantinos Venetsanopoulos | """
|
841 | c032b2ce | Klaus Aehlig | def __init__(self, unique_id, children, size, params, dyn_params, *args): |
842 | 7181fba0 | Constantinos Venetsanopoulos | """Attaches to an rbd device.
|
843 | 7181fba0 | Constantinos Venetsanopoulos |
|
844 | 7181fba0 | Constantinos Venetsanopoulos | """
|
845 | 0c3d9c7c | Thomas Thrainer | super(RADOSBlockDevice, self).__init__(unique_id, children, size, params, |
846 | c032b2ce | Klaus Aehlig | dyn_params, *args) |
847 | 7181fba0 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
848 | 7181fba0 | Constantinos Venetsanopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
849 | 7181fba0 | Constantinos Venetsanopoulos | |
850 | 7181fba0 | Constantinos Venetsanopoulos | self.driver, self.rbd_name = unique_id |
851 | f83057ad | Raffa Santi | self.rbd_pool = params[constants.LDP_POOL]
|
852 | 7181fba0 | Constantinos Venetsanopoulos | |
853 | 7181fba0 | Constantinos Venetsanopoulos | self.major = self.minor = None |
854 | 7181fba0 | Constantinos Venetsanopoulos | self.Attach()
|
855 | 7181fba0 | Constantinos Venetsanopoulos | |
856 | 7181fba0 | Constantinos Venetsanopoulos | @classmethod
|
857 | 0c3d9c7c | Thomas Thrainer | def Create(cls, unique_id, children, size, spindles, params, excl_stor, |
858 | bddc92ee | Klaus Aehlig | dyn_params, *args): |
859 | 7181fba0 | Constantinos Venetsanopoulos | """Create a new rbd device.
|
860 | 7181fba0 | Constantinos Venetsanopoulos |
|
861 | 7181fba0 | Constantinos Venetsanopoulos | Provision a new rbd volume inside a RADOS pool.
|
862 | 7181fba0 | Constantinos Venetsanopoulos |
|
863 | 7181fba0 | Constantinos Venetsanopoulos | """
|
864 | 7181fba0 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
865 | 7181fba0 | Constantinos Venetsanopoulos | raise errors.ProgrammerError("Invalid configuration data %s" % |
866 | 7181fba0 | Constantinos Venetsanopoulos | str(unique_id))
|
867 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
868 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("RBD device requested with" |
869 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
870 | 7181fba0 | Constantinos Venetsanopoulos | rbd_pool = params[constants.LDP_POOL] |
871 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name = unique_id[1]
|
872 | 7181fba0 | Constantinos Venetsanopoulos | |
873 | 7181fba0 | Constantinos Venetsanopoulos | # Provision a new rbd volume (Image) inside the RADOS cluster.
|
874 | 7181fba0 | Constantinos Venetsanopoulos | cmd = [constants.RBD_CMD, "create", "-p", rbd_pool, |
875 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name, "--size", "%s" % size] |
876 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(cmd) |
877 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
878 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd creation failed (%s): %s",
|
879 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
880 | 7181fba0 | Constantinos Venetsanopoulos | |
881 | bddc92ee | Klaus Aehlig | return RADOSBlockDevice(unique_id, children, size, params, dyn_params,
|
882 | bddc92ee | Klaus Aehlig | *args) |
883 | 7181fba0 | Constantinos Venetsanopoulos | |
884 | 7181fba0 | Constantinos Venetsanopoulos | def Remove(self): |
885 | 7181fba0 | Constantinos Venetsanopoulos | """Remove the rbd device.
|
886 | 7181fba0 | Constantinos Venetsanopoulos |
|
887 | 7181fba0 | Constantinos Venetsanopoulos | """
|
888 | 7181fba0 | Constantinos Venetsanopoulos | rbd_pool = self.params[constants.LDP_POOL]
|
889 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name = self.unique_id[1] |
890 | 7181fba0 | Constantinos Venetsanopoulos | |
891 | 7181fba0 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
892 | 7181fba0 | Constantinos Venetsanopoulos | # The rbd device doesn't exist.
|
893 | 7181fba0 | Constantinos Venetsanopoulos | return
|
894 | 7181fba0 | Constantinos Venetsanopoulos | |
895 | 7181fba0 | Constantinos Venetsanopoulos | # First shutdown the device (remove mappings).
|
896 | 7181fba0 | Constantinos Venetsanopoulos | self.Shutdown()
|
897 | 7181fba0 | Constantinos Venetsanopoulos | |
898 | 7181fba0 | Constantinos Venetsanopoulos | # Remove the actual Volume (Image) from the RADOS cluster.
|
899 | 7181fba0 | Constantinos Venetsanopoulos | cmd = [constants.RBD_CMD, "rm", "-p", rbd_pool, rbd_name] |
900 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(cmd) |
901 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
902 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't remove Volume from cluster with rbd rm: %s - %s",
|
903 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
904 | 7181fba0 | Constantinos Venetsanopoulos | |
905 | 7181fba0 | Constantinos Venetsanopoulos | def Rename(self, new_id): |
906 | 7181fba0 | Constantinos Venetsanopoulos | """Rename this device.
|
907 | 7181fba0 | Constantinos Venetsanopoulos |
|
908 | 7181fba0 | Constantinos Venetsanopoulos | """
|
909 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
910 | 7181fba0 | Constantinos Venetsanopoulos | |
911 | 7181fba0 | Constantinos Venetsanopoulos | def Attach(self): |
912 | 7181fba0 | Constantinos Venetsanopoulos | """Attach to an existing rbd device.
|
913 | 7181fba0 | Constantinos Venetsanopoulos |
|
914 | 7181fba0 | Constantinos Venetsanopoulos | This method maps the rbd volume that matches our name with
|
915 | 7181fba0 | Constantinos Venetsanopoulos | an rbd device and then attaches to this device.
|
916 | 7181fba0 | Constantinos Venetsanopoulos |
|
917 | 7181fba0 | Constantinos Venetsanopoulos | """
|
918 | 7181fba0 | Constantinos Venetsanopoulos | self.attached = False |
919 | 7181fba0 | Constantinos Venetsanopoulos | |
920 | 7181fba0 | Constantinos Venetsanopoulos | # Map the rbd volume to a block device under /dev
|
921 | 7181fba0 | Constantinos Venetsanopoulos | self.dev_path = self._MapVolumeToBlockdev(self.unique_id) |
922 | 7181fba0 | Constantinos Venetsanopoulos | |
923 | 7181fba0 | Constantinos Venetsanopoulos | try:
|
924 | 7181fba0 | Constantinos Venetsanopoulos | st = os.stat(self.dev_path)
|
925 | 7181fba0 | Constantinos Venetsanopoulos | except OSError, err: |
926 | 7181fba0 | Constantinos Venetsanopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
927 | 7181fba0 | Constantinos Venetsanopoulos | return False |
928 | 7181fba0 | Constantinos Venetsanopoulos | |
929 | 7181fba0 | Constantinos Venetsanopoulos | if not stat.S_ISBLK(st.st_mode): |
930 | 7181fba0 | Constantinos Venetsanopoulos | logging.error("%s is not a block device", self.dev_path) |
931 | 7181fba0 | Constantinos Venetsanopoulos | return False |
932 | 7181fba0 | Constantinos Venetsanopoulos | |
933 | 7181fba0 | Constantinos Venetsanopoulos | self.major = os.major(st.st_rdev)
|
934 | 7181fba0 | Constantinos Venetsanopoulos | self.minor = os.minor(st.st_rdev)
|
935 | 7181fba0 | Constantinos Venetsanopoulos | self.attached = True |
936 | 7181fba0 | Constantinos Venetsanopoulos | |
937 | 7181fba0 | Constantinos Venetsanopoulos | return True |
938 | 7181fba0 | Constantinos Venetsanopoulos | |
939 | 7181fba0 | Constantinos Venetsanopoulos | def _MapVolumeToBlockdev(self, unique_id): |
940 | 7181fba0 | Constantinos Venetsanopoulos | """Maps existing rbd volumes to block devices.
|
941 | 7181fba0 | Constantinos Venetsanopoulos |
|
942 | 7181fba0 | Constantinos Venetsanopoulos | This method should be idempotent if the mapping already exists.
|
943 | 7181fba0 | Constantinos Venetsanopoulos |
|
944 | 7181fba0 | Constantinos Venetsanopoulos | @rtype: string
|
945 | 7181fba0 | Constantinos Venetsanopoulos | @return: the block device path that corresponds to the volume
|
946 | 7181fba0 | Constantinos Venetsanopoulos |
|
947 | 7181fba0 | Constantinos Venetsanopoulos | """
|
948 | 7181fba0 | Constantinos Venetsanopoulos | pool = self.params[constants.LDP_POOL]
|
949 | 7181fba0 | Constantinos Venetsanopoulos | name = unique_id[1]
|
950 | 7181fba0 | Constantinos Venetsanopoulos | |
951 | 7181fba0 | Constantinos Venetsanopoulos | # Check if the mapping already exists.
|
952 | bdecfea2 | Stratos Psomadakis | rbd_dev = self._VolumeToBlockdev(pool, name)
|
953 | 7181fba0 | Constantinos Venetsanopoulos | if rbd_dev:
|
954 | 7181fba0 | Constantinos Venetsanopoulos | # The mapping exists. Return it.
|
955 | 7181fba0 | Constantinos Venetsanopoulos | return rbd_dev
|
956 | 7181fba0 | Constantinos Venetsanopoulos | |
957 | 7181fba0 | Constantinos Venetsanopoulos | # The mapping doesn't exist. Create it.
|
958 | 7181fba0 | Constantinos Venetsanopoulos | map_cmd = [constants.RBD_CMD, "map", "-p", pool, name] |
959 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(map_cmd) |
960 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
961 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd map failed (%s): %s",
|
962 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
963 | 7181fba0 | Constantinos Venetsanopoulos | |
964 | 7181fba0 | Constantinos Venetsanopoulos | # Find the corresponding rbd device.
|
965 | bdecfea2 | Stratos Psomadakis | rbd_dev = self._VolumeToBlockdev(pool, name)
|
966 | 7181fba0 | Constantinos Venetsanopoulos | if not rbd_dev: |
967 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd map succeeded, but could not find the rbd block"
|
968 | 89ff748d | Thomas Thrainer | " device in output of showmapped, for volume: %s", name)
|
969 | 7181fba0 | Constantinos Venetsanopoulos | |
970 | 7181fba0 | Constantinos Venetsanopoulos | # The device was successfully mapped. Return it.
|
971 | 7181fba0 | Constantinos Venetsanopoulos | return rbd_dev
|
972 | 7181fba0 | Constantinos Venetsanopoulos | |
973 | bdecfea2 | Stratos Psomadakis | @classmethod
|
974 | bdecfea2 | Stratos Psomadakis | def _VolumeToBlockdev(cls, pool, volume_name): |
975 | bdecfea2 | Stratos Psomadakis | """Do the 'volume name'-to-'rbd block device' resolving.
|
976 | bdecfea2 | Stratos Psomadakis |
|
977 | bdecfea2 | Stratos Psomadakis | @type pool: string
|
978 | bdecfea2 | Stratos Psomadakis | @param pool: RADOS pool to use
|
979 | bdecfea2 | Stratos Psomadakis | @type volume_name: string
|
980 | bdecfea2 | Stratos Psomadakis | @param volume_name: the name of the volume whose device we search for
|
981 | bdecfea2 | Stratos Psomadakis | @rtype: string or None
|
982 | bdecfea2 | Stratos Psomadakis | @return: block device path if the volume is mapped, else None
|
983 | bdecfea2 | Stratos Psomadakis |
|
984 | bdecfea2 | Stratos Psomadakis | """
|
985 | bdecfea2 | Stratos Psomadakis | try:
|
986 | bdecfea2 | Stratos Psomadakis | # Newer versions of the rbd tool support json output formatting. Use it
|
987 | bdecfea2 | Stratos Psomadakis | # if available.
|
988 | bdecfea2 | Stratos Psomadakis | showmap_cmd = [ |
989 | bdecfea2 | Stratos Psomadakis | constants.RBD_CMD, |
990 | bdecfea2 | Stratos Psomadakis | "showmapped",
|
991 | bdecfea2 | Stratos Psomadakis | "-p",
|
992 | bdecfea2 | Stratos Psomadakis | pool, |
993 | bdecfea2 | Stratos Psomadakis | "--format",
|
994 | bdecfea2 | Stratos Psomadakis | "json"
|
995 | bdecfea2 | Stratos Psomadakis | ] |
996 | bdecfea2 | Stratos Psomadakis | result = utils.RunCmd(showmap_cmd) |
997 | bdecfea2 | Stratos Psomadakis | if result.failed:
|
998 | bdecfea2 | Stratos Psomadakis | logging.error("rbd JSON output formatting returned error (%s): %s,"
|
999 | bdecfea2 | Stratos Psomadakis | "falling back to plain output parsing",
|
1000 | bdecfea2 | Stratos Psomadakis | result.fail_reason, result.output) |
1001 | bdecfea2 | Stratos Psomadakis | raise RbdShowmappedJsonError
|
1002 | bdecfea2 | Stratos Psomadakis | |
1003 | bdecfea2 | Stratos Psomadakis | return cls._ParseRbdShowmappedJson(result.output, volume_name)
|
1004 | bdecfea2 | Stratos Psomadakis | except RbdShowmappedJsonError:
|
1005 | bdecfea2 | Stratos Psomadakis | # For older versions of rbd, we have to parse the plain / text output
|
1006 | bdecfea2 | Stratos Psomadakis | # manually.
|
1007 | bdecfea2 | Stratos Psomadakis | showmap_cmd = [constants.RBD_CMD, "showmapped", "-p", pool] |
1008 | bdecfea2 | Stratos Psomadakis | result = utils.RunCmd(showmap_cmd) |
1009 | bdecfea2 | Stratos Psomadakis | if result.failed:
|
1010 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd showmapped failed (%s): %s",
|
1011 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1012 | bdecfea2 | Stratos Psomadakis | |
1013 | bdecfea2 | Stratos Psomadakis | return cls._ParseRbdShowmappedPlain(result.output, volume_name)
|
1014 | bdecfea2 | Stratos Psomadakis | |
1015 | bdecfea2 | Stratos Psomadakis | @staticmethod
|
1016 | bdecfea2 | Stratos Psomadakis | def _ParseRbdShowmappedJson(output, volume_name): |
1017 | bdecfea2 | Stratos Psomadakis | """Parse the json output of `rbd showmapped'.
|
1018 | bdecfea2 | Stratos Psomadakis |
|
1019 | bdecfea2 | Stratos Psomadakis | This method parses the json output of `rbd showmapped' and returns the rbd
|
1020 | bdecfea2 | Stratos Psomadakis | block device path (e.g. /dev/rbd0) that matches the given rbd volume.
|
1021 | bdecfea2 | Stratos Psomadakis |
|
1022 | bdecfea2 | Stratos Psomadakis | @type output: string
|
1023 | bdecfea2 | Stratos Psomadakis | @param output: the json output of `rbd showmapped'
|
1024 | bdecfea2 | Stratos Psomadakis | @type volume_name: string
|
1025 | bdecfea2 | Stratos Psomadakis | @param volume_name: the name of the volume whose device we search for
|
1026 | bdecfea2 | Stratos Psomadakis | @rtype: string or None
|
1027 | bdecfea2 | Stratos Psomadakis | @return: block device path if the volume is mapped, else None
|
1028 | bdecfea2 | Stratos Psomadakis |
|
1029 | bdecfea2 | Stratos Psomadakis | """
|
1030 | bdecfea2 | Stratos Psomadakis | try:
|
1031 | bdecfea2 | Stratos Psomadakis | devices = serializer.LoadJson(output) |
1032 | bdecfea2 | Stratos Psomadakis | except ValueError, err: |
1033 | 89ff748d | Thomas Thrainer | base.ThrowError("Unable to parse JSON data: %s" % err)
|
1034 | bdecfea2 | Stratos Psomadakis | |
1035 | bdecfea2 | Stratos Psomadakis | rbd_dev = None
|
1036 | bdecfea2 | Stratos Psomadakis | for d in devices.values(): # pylint: disable=E1103 |
1037 | bdecfea2 | Stratos Psomadakis | try:
|
1038 | bdecfea2 | Stratos Psomadakis | name = d["name"]
|
1039 | bdecfea2 | Stratos Psomadakis | except KeyError: |
1040 | 89ff748d | Thomas Thrainer | base.ThrowError("'name' key missing from json object %s", devices)
|
1041 | bdecfea2 | Stratos Psomadakis | |
1042 | bdecfea2 | Stratos Psomadakis | if name == volume_name:
|
1043 | bdecfea2 | Stratos Psomadakis | if rbd_dev is not None: |
1044 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd volume %s is mapped more than once", volume_name)
|
1045 | bdecfea2 | Stratos Psomadakis | |
1046 | bdecfea2 | Stratos Psomadakis | rbd_dev = d["device"]
|
1047 | bdecfea2 | Stratos Psomadakis | |
1048 | bdecfea2 | Stratos Psomadakis | return rbd_dev
|
1049 | bdecfea2 | Stratos Psomadakis | |
1050 | 7181fba0 | Constantinos Venetsanopoulos | @staticmethod
|
1051 | bdecfea2 | Stratos Psomadakis | def _ParseRbdShowmappedPlain(output, volume_name): |
1052 | bdecfea2 | Stratos Psomadakis | """Parse the (plain / text) output of `rbd showmapped'.
|
1053 | 7181fba0 | Constantinos Venetsanopoulos |
|
1054 | 7181fba0 | Constantinos Venetsanopoulos | This method parses the output of `rbd showmapped' and returns
|
1055 | 7181fba0 | Constantinos Venetsanopoulos | the rbd block device path (e.g. /dev/rbd0) that matches the
|
1056 | 7181fba0 | Constantinos Venetsanopoulos | given rbd volume.
|
1057 | 7181fba0 | Constantinos Venetsanopoulos |
|
1058 | 7181fba0 | Constantinos Venetsanopoulos | @type output: string
|
1059 | bdecfea2 | Stratos Psomadakis | @param output: the plain text output of `rbd showmapped'
|
1060 | 7181fba0 | Constantinos Venetsanopoulos | @type volume_name: string
|
1061 | 7181fba0 | Constantinos Venetsanopoulos | @param volume_name: the name of the volume whose device we search for
|
1062 | 7181fba0 | Constantinos Venetsanopoulos | @rtype: string or None
|
1063 | 7181fba0 | Constantinos Venetsanopoulos | @return: block device path if the volume is mapped, else None
|
1064 | 7181fba0 | Constantinos Venetsanopoulos |
|
1065 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1066 | 7181fba0 | Constantinos Venetsanopoulos | allfields = 5
|
1067 | 7181fba0 | Constantinos Venetsanopoulos | volumefield = 2
|
1068 | 7181fba0 | Constantinos Venetsanopoulos | devicefield = 4
|
1069 | 7181fba0 | Constantinos Venetsanopoulos | |
1070 | 7181fba0 | Constantinos Venetsanopoulos | lines = output.splitlines() |
1071 | 7181fba0 | Constantinos Venetsanopoulos | |
1072 | bdecfea2 | Stratos Psomadakis | # Try parsing the new output format (ceph >= 0.55).
|
1073 | bdecfea2 | Stratos Psomadakis | splitted_lines = map(lambda l: l.split(), lines) |
1074 | bdecfea2 | Stratos Psomadakis | |
1075 | bdecfea2 | Stratos Psomadakis | # Check for empty output.
|
1076 | 7181fba0 | Constantinos Venetsanopoulos | if not splitted_lines: |
1077 | bdecfea2 | Stratos Psomadakis | return None |
1078 | 7181fba0 | Constantinos Venetsanopoulos | |
1079 | bdecfea2 | Stratos Psomadakis | # Check showmapped output, to determine number of fields.
|
1080 | 7181fba0 | Constantinos Venetsanopoulos | field_cnt = len(splitted_lines[0]) |
1081 | 7181fba0 | Constantinos Venetsanopoulos | if field_cnt != allfields:
|
1082 | bdecfea2 | Stratos Psomadakis | # Parsing the new format failed. Fallback to parsing the old output
|
1083 | bdecfea2 | Stratos Psomadakis | # format (< 0.55).
|
1084 | bdecfea2 | Stratos Psomadakis | splitted_lines = map(lambda l: l.split("\t"), lines) |
1085 | bdecfea2 | Stratos Psomadakis | if field_cnt != allfields:
|
1086 | 89ff748d | Thomas Thrainer | base.ThrowError("Cannot parse rbd showmapped output expected %s fields,"
|
1087 | 89ff748d | Thomas Thrainer | " found %s", allfields, field_cnt)
|
1088 | 7181fba0 | Constantinos Venetsanopoulos | |
1089 | 7181fba0 | Constantinos Venetsanopoulos | matched_lines = \ |
1090 | 7181fba0 | Constantinos Venetsanopoulos | filter(lambda l: len(l) == allfields and l[volumefield] == volume_name, |
1091 | 7181fba0 | Constantinos Venetsanopoulos | splitted_lines) |
1092 | 7181fba0 | Constantinos Venetsanopoulos | |
1093 | 7181fba0 | Constantinos Venetsanopoulos | if len(matched_lines) > 1: |
1094 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd volume %s mapped more than once", volume_name)
|
1095 | 7181fba0 | Constantinos Venetsanopoulos | |
1096 | 7181fba0 | Constantinos Venetsanopoulos | if matched_lines:
|
1097 | 7181fba0 | Constantinos Venetsanopoulos | # rbd block device found. Return it.
|
1098 | 7181fba0 | Constantinos Venetsanopoulos | rbd_dev = matched_lines[0][devicefield]
|
1099 | 7181fba0 | Constantinos Venetsanopoulos | return rbd_dev
|
1100 | 7181fba0 | Constantinos Venetsanopoulos | |
1101 | 7181fba0 | Constantinos Venetsanopoulos | # The given volume is not mapped.
|
1102 | 7181fba0 | Constantinos Venetsanopoulos | return None |
1103 | 7181fba0 | Constantinos Venetsanopoulos | |
1104 | 7181fba0 | Constantinos Venetsanopoulos | def Assemble(self): |
1105 | 7181fba0 | Constantinos Venetsanopoulos | """Assemble the device.
|
1106 | 7181fba0 | Constantinos Venetsanopoulos |
|
1107 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1108 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1109 | 7181fba0 | Constantinos Venetsanopoulos | |
1110 | 7181fba0 | Constantinos Venetsanopoulos | def Shutdown(self): |
1111 | 7181fba0 | Constantinos Venetsanopoulos | """Shutdown the device.
|
1112 | 7181fba0 | Constantinos Venetsanopoulos |
|
1113 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1114 | 7181fba0 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1115 | 7181fba0 | Constantinos Venetsanopoulos | # The rbd device doesn't exist.
|
1116 | 7181fba0 | Constantinos Venetsanopoulos | return
|
1117 | 7181fba0 | Constantinos Venetsanopoulos | |
1118 | 7181fba0 | Constantinos Venetsanopoulos | # Unmap the block device from the Volume.
|
1119 | 7181fba0 | Constantinos Venetsanopoulos | self._UnmapVolumeFromBlockdev(self.unique_id) |
1120 | 7181fba0 | Constantinos Venetsanopoulos | |
1121 | 7181fba0 | Constantinos Venetsanopoulos | self.minor = None |
1122 | 7181fba0 | Constantinos Venetsanopoulos | self.dev_path = None |
1123 | 7181fba0 | Constantinos Venetsanopoulos | |
1124 | 7181fba0 | Constantinos Venetsanopoulos | def _UnmapVolumeFromBlockdev(self, unique_id): |
1125 | 7181fba0 | Constantinos Venetsanopoulos | """Unmaps the rbd device from the Volume it is mapped.
|
1126 | 7181fba0 | Constantinos Venetsanopoulos |
|
1127 | 7181fba0 | Constantinos Venetsanopoulos | Unmaps the rbd device from the Volume it was previously mapped to.
|
1128 | 7181fba0 | Constantinos Venetsanopoulos | This method should be idempotent if the Volume isn't mapped.
|
1129 | 7181fba0 | Constantinos Venetsanopoulos |
|
1130 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1131 | 7181fba0 | Constantinos Venetsanopoulos | pool = self.params[constants.LDP_POOL]
|
1132 | 7181fba0 | Constantinos Venetsanopoulos | name = unique_id[1]
|
1133 | 7181fba0 | Constantinos Venetsanopoulos | |
1134 | 7181fba0 | Constantinos Venetsanopoulos | # Check if the mapping already exists.
|
1135 | bdecfea2 | Stratos Psomadakis | rbd_dev = self._VolumeToBlockdev(pool, name)
|
1136 | 7181fba0 | Constantinos Venetsanopoulos | |
1137 | 7181fba0 | Constantinos Venetsanopoulos | if rbd_dev:
|
1138 | 7181fba0 | Constantinos Venetsanopoulos | # The mapping exists. Unmap the rbd device.
|
1139 | 7181fba0 | Constantinos Venetsanopoulos | unmap_cmd = [constants.RBD_CMD, "unmap", "%s" % rbd_dev] |
1140 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(unmap_cmd) |
1141 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1142 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd unmap failed (%s): %s",
|
1143 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1144 | 7181fba0 | Constantinos Venetsanopoulos | |
1145 | 7181fba0 | Constantinos Venetsanopoulos | def Open(self, force=False): |
1146 | 7181fba0 | Constantinos Venetsanopoulos | """Make the device ready for I/O.
|
1147 | 7181fba0 | Constantinos Venetsanopoulos |
|
1148 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1149 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1150 | 7181fba0 | Constantinos Venetsanopoulos | |
1151 | 7181fba0 | Constantinos Venetsanopoulos | def Close(self): |
1152 | 7181fba0 | Constantinos Venetsanopoulos | """Notifies that the device will no longer be used for I/O.
|
1153 | 7181fba0 | Constantinos Venetsanopoulos |
|
1154 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1155 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1156 | 7181fba0 | Constantinos Venetsanopoulos | |
1157 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
1158 | 7181fba0 | Constantinos Venetsanopoulos | """Grow the Volume.
|
1159 | 7181fba0 | Constantinos Venetsanopoulos |
|
1160 | 7181fba0 | Constantinos Venetsanopoulos | @type amount: integer
|
1161 | 7181fba0 | Constantinos Venetsanopoulos | @param amount: the amount (in mebibytes) to grow with
|
1162 | 7181fba0 | Constantinos Venetsanopoulos | @type dryrun: boolean
|
1163 | 7181fba0 | Constantinos Venetsanopoulos | @param dryrun: whether to execute the operation in simulation mode
|
1164 | 7181fba0 | Constantinos Venetsanopoulos | only, without actually increasing the size
|
1165 | 7181fba0 | Constantinos Venetsanopoulos |
|
1166 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1167 | cad0723b | Iustin Pop | if not backingstore: |
1168 | cad0723b | Iustin Pop | return
|
1169 | 7181fba0 | Constantinos Venetsanopoulos | if not self.Attach(): |
1170 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't attach to rbd device during Grow()")
|
1171 | 7181fba0 | Constantinos Venetsanopoulos | |
1172 | 7181fba0 | Constantinos Venetsanopoulos | if dryrun:
|
1173 | 7181fba0 | Constantinos Venetsanopoulos | # the rbd tool does not support dry runs of resize operations.
|
1174 | 7181fba0 | Constantinos Venetsanopoulos | # Since rbd volumes are thinly provisioned, we assume
|
1175 | 7181fba0 | Constantinos Venetsanopoulos | # there is always enough free space for the operation.
|
1176 | 7181fba0 | Constantinos Venetsanopoulos | return
|
1177 | 7181fba0 | Constantinos Venetsanopoulos | |
1178 | 7181fba0 | Constantinos Venetsanopoulos | rbd_pool = self.params[constants.LDP_POOL]
|
1179 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name = self.unique_id[1] |
1180 | 7181fba0 | Constantinos Venetsanopoulos | new_size = self.size + amount
|
1181 | 7181fba0 | Constantinos Venetsanopoulos | |
1182 | 7181fba0 | Constantinos Venetsanopoulos | # Resize the rbd volume (Image) inside the RADOS cluster.
|
1183 | 7181fba0 | Constantinos Venetsanopoulos | cmd = [constants.RBD_CMD, "resize", "-p", rbd_pool, |
1184 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name, "--size", "%s" % new_size] |
1185 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(cmd) |
1186 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1187 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd resize failed (%s): %s",
|
1188 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1189 | 7181fba0 | Constantinos Venetsanopoulos | |
1190 | f83057ad | Raffa Santi | def GetUserspaceAccessUri(self, hypervisor): |
1191 | f83057ad | Raffa Santi | """Generate KVM userspace URIs to be used as `-drive file` settings.
|
1192 | f83057ad | Raffa Santi |
|
1193 | f83057ad | Raffa Santi | @see: L{BlockDev.GetUserspaceAccessUri}
|
1194 | f83057ad | Raffa Santi |
|
1195 | f83057ad | Raffa Santi | """
|
1196 | f83057ad | Raffa Santi | if hypervisor == constants.HT_KVM:
|
1197 | f83057ad | Raffa Santi | return "rbd:" + self.rbd_pool + "/" + self.rbd_name |
1198 | f83057ad | Raffa Santi | else:
|
1199 | f83057ad | Raffa Santi | base.ThrowError("Hypervisor %s doesn't support RBD userspace access" %
|
1200 | f83057ad | Raffa Santi | hypervisor) |
1201 | f83057ad | Raffa Santi | |
1202 | 7181fba0 | Constantinos Venetsanopoulos | |
1203 | 89ff748d | Thomas Thrainer | class ExtStorageDevice(base.BlockDev): |
1204 | 376631d1 | Constantinos Venetsanopoulos | """A block device provided by an ExtStorage Provider.
|
1205 | 376631d1 | Constantinos Venetsanopoulos |
|
1206 | 376631d1 | Constantinos Venetsanopoulos | This class implements the External Storage Interface, which means
|
1207 | 376631d1 | Constantinos Venetsanopoulos | handling of the externally provided block devices.
|
1208 | 376631d1 | Constantinos Venetsanopoulos |
|
1209 | 376631d1 | Constantinos Venetsanopoulos | """
|
1210 | 702c3270 | Dimitris Aragiorgis | def __init__(self, unique_id, children, size, params, dyn_params, *args): |
1211 | 376631d1 | Constantinos Venetsanopoulos | """Attaches to an extstorage block device.
|
1212 | 376631d1 | Constantinos Venetsanopoulos |
|
1213 | 376631d1 | Constantinos Venetsanopoulos | """
|
1214 | 0c3d9c7c | Thomas Thrainer | super(ExtStorageDevice, self).__init__(unique_id, children, size, params, |
1215 | bddc92ee | Klaus Aehlig | dyn_params, *args) |
1216 | 702c3270 | Dimitris Aragiorgis | (self.name, self.uuid) = args |
1217 | 702c3270 | Dimitris Aragiorgis | |
1218 | 376631d1 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1219 | 376631d1 | Constantinos Venetsanopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1220 | 376631d1 | Constantinos Venetsanopoulos | |
1221 | 376631d1 | Constantinos Venetsanopoulos | self.driver, self.vol_name = unique_id |
1222 | 938adc87 | Constantinos Venetsanopoulos | self.ext_params = params
|
1223 | 376631d1 | Constantinos Venetsanopoulos | |
1224 | 376631d1 | Constantinos Venetsanopoulos | self.major = self.minor = None |
1225 | 376631d1 | Constantinos Venetsanopoulos | self.Attach()
|
1226 | 376631d1 | Constantinos Venetsanopoulos | |
1227 | 376631d1 | Constantinos Venetsanopoulos | @classmethod
|
1228 | 0c3d9c7c | Thomas Thrainer | def Create(cls, unique_id, children, size, spindles, params, excl_stor, |
1229 | 702c3270 | Dimitris Aragiorgis | dyn_params, *args): |
1230 | 376631d1 | Constantinos Venetsanopoulos | """Create a new extstorage device.
|
1231 | 376631d1 | Constantinos Venetsanopoulos |
|
1232 | 376631d1 | Constantinos Venetsanopoulos | Provision a new volume using an extstorage provider, which will
|
1233 | 376631d1 | Constantinos Venetsanopoulos | then be mapped to a block device.
|
1234 | 376631d1 | Constantinos Venetsanopoulos |
|
1235 | 376631d1 | Constantinos Venetsanopoulos | """
|
1236 | 702c3270 | Dimitris Aragiorgis | (name, uuid) = args |
1237 | 702c3270 | Dimitris Aragiorgis | |
1238 | 376631d1 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1239 | 376631d1 | Constantinos Venetsanopoulos | raise errors.ProgrammerError("Invalid configuration data %s" % |
1240 | 376631d1 | Constantinos Venetsanopoulos | str(unique_id))
|
1241 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
1242 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("extstorage device requested with" |
1243 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
1244 | 376631d1 | Constantinos Venetsanopoulos | |
1245 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's create script,
|
1246 | 376631d1 | Constantinos Venetsanopoulos | # to provision a new Volume inside the External Storage
|
1247 | 938adc87 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_CREATE, unique_id, |
1248 | 702c3270 | Dimitris Aragiorgis | params, size=str(size), name=name, uuid=uuid)
|
1249 | 376631d1 | Constantinos Venetsanopoulos | |
1250 | bddc92ee | Klaus Aehlig | return ExtStorageDevice(unique_id, children, size, params, dyn_params,
|
1251 | bddc92ee | Klaus Aehlig | *args) |
1252 | 376631d1 | Constantinos Venetsanopoulos | |
1253 | 376631d1 | Constantinos Venetsanopoulos | def Remove(self): |
1254 | 376631d1 | Constantinos Venetsanopoulos | """Remove the extstorage device.
|
1255 | 376631d1 | Constantinos Venetsanopoulos |
|
1256 | 376631d1 | Constantinos Venetsanopoulos | """
|
1257 | 376631d1 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1258 | 376631d1 | Constantinos Venetsanopoulos | # The extstorage device doesn't exist.
|
1259 | 376631d1 | Constantinos Venetsanopoulos | return
|
1260 | 376631d1 | Constantinos Venetsanopoulos | |
1261 | 376631d1 | Constantinos Venetsanopoulos | # First shutdown the device (remove mappings).
|
1262 | 376631d1 | Constantinos Venetsanopoulos | self.Shutdown()
|
1263 | 376631d1 | Constantinos Venetsanopoulos | |
1264 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's remove script,
|
1265 | 376631d1 | Constantinos Venetsanopoulos | # to remove the Volume from the External Storage
|
1266 | 938adc87 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_REMOVE, self.unique_id,
|
1267 | 702c3270 | Dimitris Aragiorgis | self.ext_params, name=self.name, uuid=self.uuid) |
1268 | 376631d1 | Constantinos Venetsanopoulos | |
1269 | 376631d1 | Constantinos Venetsanopoulos | def Rename(self, new_id): |
1270 | 376631d1 | Constantinos Venetsanopoulos | """Rename this device.
|
1271 | 376631d1 | Constantinos Venetsanopoulos |
|
1272 | 376631d1 | Constantinos Venetsanopoulos | """
|
1273 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1274 | 376631d1 | Constantinos Venetsanopoulos | |
1275 | 376631d1 | Constantinos Venetsanopoulos | def Attach(self): |
1276 | 376631d1 | Constantinos Venetsanopoulos | """Attach to an existing extstorage device.
|
1277 | 376631d1 | Constantinos Venetsanopoulos |
|
1278 | 376631d1 | Constantinos Venetsanopoulos | This method maps the extstorage volume that matches our name with
|
1279 | 376631d1 | Constantinos Venetsanopoulos | a corresponding block device and then attaches to this device.
|
1280 | 376631d1 | Constantinos Venetsanopoulos |
|
1281 | 376631d1 | Constantinos Venetsanopoulos | """
|
1282 | 376631d1 | Constantinos Venetsanopoulos | self.attached = False |
1283 | 376631d1 | Constantinos Venetsanopoulos | |
1284 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's attach script,
|
1285 | 376631d1 | Constantinos Venetsanopoulos | # to attach an existing Volume to a block device under /dev
|
1286 | 376631d1 | Constantinos Venetsanopoulos | self.dev_path = _ExtStorageAction(constants.ES_ACTION_ATTACH,
|
1287 | 702c3270 | Dimitris Aragiorgis | self.unique_id, self.ext_params, |
1288 | 702c3270 | Dimitris Aragiorgis | name=self.name, uuid=self.uuid) |
1289 | 376631d1 | Constantinos Venetsanopoulos | |
1290 | 376631d1 | Constantinos Venetsanopoulos | try:
|
1291 | 376631d1 | Constantinos Venetsanopoulos | st = os.stat(self.dev_path)
|
1292 | 376631d1 | Constantinos Venetsanopoulos | except OSError, err: |
1293 | 376631d1 | Constantinos Venetsanopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
1294 | 376631d1 | Constantinos Venetsanopoulos | return False |
1295 | 376631d1 | Constantinos Venetsanopoulos | |
1296 | 376631d1 | Constantinos Venetsanopoulos | if not stat.S_ISBLK(st.st_mode): |
1297 | 376631d1 | Constantinos Venetsanopoulos | logging.error("%s is not a block device", self.dev_path) |
1298 | 376631d1 | Constantinos Venetsanopoulos | return False |
1299 | 376631d1 | Constantinos Venetsanopoulos | |
1300 | 376631d1 | Constantinos Venetsanopoulos | self.major = os.major(st.st_rdev)
|
1301 | 376631d1 | Constantinos Venetsanopoulos | self.minor = os.minor(st.st_rdev)
|
1302 | 376631d1 | Constantinos Venetsanopoulos | self.attached = True |
1303 | 376631d1 | Constantinos Venetsanopoulos | |
1304 | 376631d1 | Constantinos Venetsanopoulos | return True |
1305 | 376631d1 | Constantinos Venetsanopoulos | |
1306 | 376631d1 | Constantinos Venetsanopoulos | def Assemble(self): |
1307 | 376631d1 | Constantinos Venetsanopoulos | """Assemble the device.
|
1308 | 376631d1 | Constantinos Venetsanopoulos |
|
1309 | 376631d1 | Constantinos Venetsanopoulos | """
|
1310 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1311 | 376631d1 | Constantinos Venetsanopoulos | |
1312 | 376631d1 | Constantinos Venetsanopoulos | def Shutdown(self): |
1313 | 376631d1 | Constantinos Venetsanopoulos | """Shutdown the device.
|
1314 | 376631d1 | Constantinos Venetsanopoulos |
|
1315 | 376631d1 | Constantinos Venetsanopoulos | """
|
1316 | 376631d1 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1317 | 376631d1 | Constantinos Venetsanopoulos | # The extstorage device doesn't exist.
|
1318 | 376631d1 | Constantinos Venetsanopoulos | return
|
1319 | 376631d1 | Constantinos Venetsanopoulos | |
1320 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's detach script,
|
1321 | 376631d1 | Constantinos Venetsanopoulos | # to detach an existing Volume from it's block device under /dev
|
1322 | 938adc87 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_DETACH, self.unique_id,
|
1323 | 702c3270 | Dimitris Aragiorgis | self.ext_params, name=self.name, uuid=self.uuid) |
1324 | 376631d1 | Constantinos Venetsanopoulos | |
1325 | 376631d1 | Constantinos Venetsanopoulos | self.minor = None |
1326 | 376631d1 | Constantinos Venetsanopoulos | self.dev_path = None |
1327 | 376631d1 | Constantinos Venetsanopoulos | |
1328 | 376631d1 | Constantinos Venetsanopoulos | def Open(self, force=False): |
1329 | 376631d1 | Constantinos Venetsanopoulos | """Make the device ready for I/O.
|
1330 | 376631d1 | Constantinos Venetsanopoulos |
|
1331 | 376631d1 | Constantinos Venetsanopoulos | """
|
1332 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1333 | 376631d1 | Constantinos Venetsanopoulos | |
1334 | 376631d1 | Constantinos Venetsanopoulos | def Close(self): |
1335 | 376631d1 | Constantinos Venetsanopoulos | """Notifies that the device will no longer be used for I/O.
|
1336 | 376631d1 | Constantinos Venetsanopoulos |
|
1337 | 376631d1 | Constantinos Venetsanopoulos | """
|
1338 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1339 | 376631d1 | Constantinos Venetsanopoulos | |
1340 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
1341 | 376631d1 | Constantinos Venetsanopoulos | """Grow the Volume.
|
1342 | 376631d1 | Constantinos Venetsanopoulos |
|
1343 | 376631d1 | Constantinos Venetsanopoulos | @type amount: integer
|
1344 | 376631d1 | Constantinos Venetsanopoulos | @param amount: the amount (in mebibytes) to grow with
|
1345 | 376631d1 | Constantinos Venetsanopoulos | @type dryrun: boolean
|
1346 | 376631d1 | Constantinos Venetsanopoulos | @param dryrun: whether to execute the operation in simulation mode
|
1347 | 376631d1 | Constantinos Venetsanopoulos | only, without actually increasing the size
|
1348 | 376631d1 | Constantinos Venetsanopoulos |
|
1349 | 376631d1 | Constantinos Venetsanopoulos | """
|
1350 | 376631d1 | Constantinos Venetsanopoulos | if not backingstore: |
1351 | 376631d1 | Constantinos Venetsanopoulos | return
|
1352 | 376631d1 | Constantinos Venetsanopoulos | if not self.Attach(): |
1353 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't attach to extstorage device during Grow()")
|
1354 | 376631d1 | Constantinos Venetsanopoulos | |
1355 | 376631d1 | Constantinos Venetsanopoulos | if dryrun:
|
1356 | 376631d1 | Constantinos Venetsanopoulos | # we do not support dry runs of resize operations for now.
|
1357 | 376631d1 | Constantinos Venetsanopoulos | return
|
1358 | 376631d1 | Constantinos Venetsanopoulos | |
1359 | 376631d1 | Constantinos Venetsanopoulos | new_size = self.size + amount
|
1360 | 376631d1 | Constantinos Venetsanopoulos | |
1361 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's grow script,
|
1362 | 376631d1 | Constantinos Venetsanopoulos | # to grow an existing Volume inside the External Storage
|
1363 | 376631d1 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_GROW, self.unique_id,
|
1364 | 702c3270 | Dimitris Aragiorgis | self.ext_params, size=str(self.size), grow=str(new_size), |
1365 | 702c3270 | Dimitris Aragiorgis | name=self.name, uuid=self.uuid) |
1366 | 376631d1 | Constantinos Venetsanopoulos | |
1367 | 376631d1 | Constantinos Venetsanopoulos | def SetInfo(self, text): |
1368 | 376631d1 | Constantinos Venetsanopoulos | """Update metadata with info text.
|
1369 | 376631d1 | Constantinos Venetsanopoulos |
|
1370 | 376631d1 | Constantinos Venetsanopoulos | """
|
1371 | 376631d1 | Constantinos Venetsanopoulos | # Replace invalid characters
|
1372 | 376631d1 | Constantinos Venetsanopoulos | text = re.sub("^[^A-Za-z0-9_+.]", "_", text) |
1373 | 376631d1 | Constantinos Venetsanopoulos | text = re.sub("[^-A-Za-z0-9_+.]", "_", text) |
1374 | 376631d1 | Constantinos Venetsanopoulos | |
1375 | 376631d1 | Constantinos Venetsanopoulos | # Only up to 128 characters are allowed
|
1376 | 376631d1 | Constantinos Venetsanopoulos | text = text[:128]
|
1377 | 376631d1 | Constantinos Venetsanopoulos | |
1378 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's setinfo script,
|
1379 | 376631d1 | Constantinos Venetsanopoulos | # to set metadata for an existing Volume inside the External Storage
|
1380 | 376631d1 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_SETINFO, self.unique_id,
|
1381 | 702c3270 | Dimitris Aragiorgis | self.ext_params, metadata=text,
|
1382 | 702c3270 | Dimitris Aragiorgis | name=self.name, uuid=self.uuid) |
1383 | 376631d1 | Constantinos Venetsanopoulos | |
1384 | 376631d1 | Constantinos Venetsanopoulos | |
1385 | 938adc87 | Constantinos Venetsanopoulos | def _ExtStorageAction(action, unique_id, ext_params, |
1386 | 702c3270 | Dimitris Aragiorgis | size=None, grow=None, metadata=None, |
1387 | 702c3270 | Dimitris Aragiorgis | name=None, uuid=None): |
1388 | 376631d1 | Constantinos Venetsanopoulos | """Take an External Storage action.
|
1389 | 376631d1 | Constantinos Venetsanopoulos |
|
1390 | 376631d1 | Constantinos Venetsanopoulos | Take an External Storage action concerning or affecting
|
1391 | 376631d1 | Constantinos Venetsanopoulos | a specific Volume inside the External Storage.
|
1392 | 376631d1 | Constantinos Venetsanopoulos |
|
1393 | 376631d1 | Constantinos Venetsanopoulos | @type action: string
|
1394 | 376631d1 | Constantinos Venetsanopoulos | @param action: which action to perform. One of:
|
1395 | 376631d1 | Constantinos Venetsanopoulos | create / remove / grow / attach / detach
|
1396 | 376631d1 | Constantinos Venetsanopoulos | @type unique_id: tuple (driver, vol_name)
|
1397 | 376631d1 | Constantinos Venetsanopoulos | @param unique_id: a tuple containing the type of ExtStorage (driver)
|
1398 | 376631d1 | Constantinos Venetsanopoulos | and the Volume name
|
1399 | 938adc87 | Constantinos Venetsanopoulos | @type ext_params: dict
|
1400 | 938adc87 | Constantinos Venetsanopoulos | @param ext_params: ExtStorage parameters
|
1401 | 376631d1 | Constantinos Venetsanopoulos | @type size: integer
|
1402 | 376631d1 | Constantinos Venetsanopoulos | @param size: the size of the Volume in mebibytes
|
1403 | 376631d1 | Constantinos Venetsanopoulos | @type grow: integer
|
1404 | 376631d1 | Constantinos Venetsanopoulos | @param grow: the new size in mebibytes (after grow)
|
1405 | 376631d1 | Constantinos Venetsanopoulos | @type metadata: string
|
1406 | 376631d1 | Constantinos Venetsanopoulos | @param metadata: metadata info of the Volume, for use by the provider
|
1407 | 702c3270 | Dimitris Aragiorgis | @type name: string
|
1408 | 702c3270 | Dimitris Aragiorgis | @param name: name of the Volume (objects.Disk.name)
|
1409 | 702c3270 | Dimitris Aragiorgis | @type uuid: string
|
1410 | 702c3270 | Dimitris Aragiorgis | @param uuid: uuid of the Volume (objects.Disk.uuid)
|
1411 | 376631d1 | Constantinos Venetsanopoulos | @rtype: None or a block device path (during attach)
|
1412 | 376631d1 | Constantinos Venetsanopoulos |
|
1413 | 376631d1 | Constantinos Venetsanopoulos | """
|
1414 | 376631d1 | Constantinos Venetsanopoulos | driver, vol_name = unique_id |
1415 | 376631d1 | Constantinos Venetsanopoulos | |
1416 | 376631d1 | Constantinos Venetsanopoulos | # Create an External Storage instance of type `driver'
|
1417 | 376631d1 | Constantinos Venetsanopoulos | status, inst_es = ExtStorageFromDisk(driver) |
1418 | 376631d1 | Constantinos Venetsanopoulos | if not status: |
1419 | 89ff748d | Thomas Thrainer | base.ThrowError("%s" % inst_es)
|
1420 | 376631d1 | Constantinos Venetsanopoulos | |
1421 | 376631d1 | Constantinos Venetsanopoulos | # Create the basic environment for the driver's scripts
|
1422 | 938adc87 | Constantinos Venetsanopoulos | create_env = _ExtStorageEnvironment(unique_id, ext_params, size, |
1423 | 702c3270 | Dimitris Aragiorgis | grow, metadata, name, uuid) |
1424 | 376631d1 | Constantinos Venetsanopoulos | |
1425 | 376631d1 | Constantinos Venetsanopoulos | # Do not use log file for action `attach' as we need
|
1426 | 376631d1 | Constantinos Venetsanopoulos | # to get the output from RunResult
|
1427 | 376631d1 | Constantinos Venetsanopoulos | # TODO: find a way to have a log file for attach too
|
1428 | 376631d1 | Constantinos Venetsanopoulos | logfile = None
|
1429 | 376631d1 | Constantinos Venetsanopoulos | if action is not constants.ES_ACTION_ATTACH: |
1430 | 376631d1 | Constantinos Venetsanopoulos | logfile = _VolumeLogName(action, driver, vol_name) |
1431 | 376631d1 | Constantinos Venetsanopoulos | |
1432 | 376631d1 | Constantinos Venetsanopoulos | # Make sure the given action results in a valid script
|
1433 | 376631d1 | Constantinos Venetsanopoulos | if action not in constants.ES_SCRIPTS: |
1434 | 89ff748d | Thomas Thrainer | base.ThrowError("Action '%s' doesn't result in a valid ExtStorage script" %
|
1435 | 89ff748d | Thomas Thrainer | action) |
1436 | 376631d1 | Constantinos Venetsanopoulos | |
1437 | 376631d1 | Constantinos Venetsanopoulos | # Find out which external script to run according the given action
|
1438 | 376631d1 | Constantinos Venetsanopoulos | script_name = action + "_script"
|
1439 | 376631d1 | Constantinos Venetsanopoulos | script = getattr(inst_es, script_name)
|
1440 | 376631d1 | Constantinos Venetsanopoulos | |
1441 | 376631d1 | Constantinos Venetsanopoulos | # Run the external script
|
1442 | 376631d1 | Constantinos Venetsanopoulos | result = utils.RunCmd([script], env=create_env, |
1443 | 376631d1 | Constantinos Venetsanopoulos | cwd=inst_es.path, output=logfile,) |
1444 | 376631d1 | Constantinos Venetsanopoulos | if result.failed:
|
1445 | 376631d1 | Constantinos Venetsanopoulos | logging.error("External storage's %s command '%s' returned"
|
1446 | 376631d1 | Constantinos Venetsanopoulos | " error: %s, logfile: %s, output: %s",
|
1447 | 376631d1 | Constantinos Venetsanopoulos | action, result.cmd, result.fail_reason, |
1448 | 376631d1 | Constantinos Venetsanopoulos | logfile, result.output) |
1449 | 376631d1 | Constantinos Venetsanopoulos | |
1450 | 376631d1 | Constantinos Venetsanopoulos | # If logfile is 'None' (during attach), it breaks TailFile
|
1451 | 376631d1 | Constantinos Venetsanopoulos | # TODO: have a log file for attach too
|
1452 | 376631d1 | Constantinos Venetsanopoulos | if action is not constants.ES_ACTION_ATTACH: |
1453 | 376631d1 | Constantinos Venetsanopoulos | lines = [utils.SafeEncode(val) |
1454 | 376631d1 | Constantinos Venetsanopoulos | for val in utils.TailFile(logfile, lines=20)] |
1455 | 376631d1 | Constantinos Venetsanopoulos | else:
|
1456 | 376631d1 | Constantinos Venetsanopoulos | lines = result.output[-20:]
|
1457 | 376631d1 | Constantinos Venetsanopoulos | |
1458 | 89ff748d | Thomas Thrainer | base.ThrowError("External storage's %s script failed (%s), last"
|
1459 | 89ff748d | Thomas Thrainer | " lines of output:\n%s",
|
1460 | 89ff748d | Thomas Thrainer | action, result.fail_reason, "\n".join(lines))
|
1461 | 376631d1 | Constantinos Venetsanopoulos | |
1462 | 376631d1 | Constantinos Venetsanopoulos | if action == constants.ES_ACTION_ATTACH:
|
1463 | 376631d1 | Constantinos Venetsanopoulos | return result.stdout
|
1464 | 376631d1 | Constantinos Venetsanopoulos | |
1465 | 376631d1 | Constantinos Venetsanopoulos | |
1466 | 376631d1 | Constantinos Venetsanopoulos | def ExtStorageFromDisk(name, base_dir=None): |
1467 | 376631d1 | Constantinos Venetsanopoulos | """Create an ExtStorage instance from disk.
|
1468 | 376631d1 | Constantinos Venetsanopoulos |
|
1469 | 376631d1 | Constantinos Venetsanopoulos | This function will return an ExtStorage instance
|
1470 | 376631d1 | Constantinos Venetsanopoulos | if the given name is a valid ExtStorage name.
|
1471 | 376631d1 | Constantinos Venetsanopoulos |
|
1472 | 376631d1 | Constantinos Venetsanopoulos | @type base_dir: string
|
1473 | 376631d1 | Constantinos Venetsanopoulos | @keyword base_dir: Base directory containing ExtStorage installations.
|
1474 | 376631d1 | Constantinos Venetsanopoulos | Defaults to a search in all the ES_SEARCH_PATH dirs.
|
1475 | 376631d1 | Constantinos Venetsanopoulos | @rtype: tuple
|
1476 | 376631d1 | Constantinos Venetsanopoulos | @return: True and the ExtStorage instance if we find a valid one, or
|
1477 | 376631d1 | Constantinos Venetsanopoulos | False and the diagnose message on error
|
1478 | 376631d1 | Constantinos Venetsanopoulos |
|
1479 | 376631d1 | Constantinos Venetsanopoulos | """
|
1480 | 376631d1 | Constantinos Venetsanopoulos | if base_dir is None: |
1481 | 376631d1 | Constantinos Venetsanopoulos | es_base_dir = pathutils.ES_SEARCH_PATH |
1482 | 376631d1 | Constantinos Venetsanopoulos | else:
|
1483 | 376631d1 | Constantinos Venetsanopoulos | es_base_dir = [base_dir] |
1484 | 376631d1 | Constantinos Venetsanopoulos | |
1485 | 376631d1 | Constantinos Venetsanopoulos | es_dir = utils.FindFile(name, es_base_dir, os.path.isdir) |
1486 | 376631d1 | Constantinos Venetsanopoulos | |
1487 | 376631d1 | Constantinos Venetsanopoulos | if es_dir is None: |
1488 | 376631d1 | Constantinos Venetsanopoulos | return False, ("Directory for External Storage Provider %s not" |
1489 | 376631d1 | Constantinos Venetsanopoulos | " found in search path" % name)
|
1490 | 376631d1 | Constantinos Venetsanopoulos | |
1491 | 376631d1 | Constantinos Venetsanopoulos | # ES Files dictionary, we will populate it with the absolute path
|
1492 | 376631d1 | Constantinos Venetsanopoulos | # names; if the value is True, then it is a required file, otherwise
|
1493 | 376631d1 | Constantinos Venetsanopoulos | # an optional one
|
1494 | 376631d1 | Constantinos Venetsanopoulos | es_files = dict.fromkeys(constants.ES_SCRIPTS, True) |
1495 | 376631d1 | Constantinos Venetsanopoulos | |
1496 | 938adc87 | Constantinos Venetsanopoulos | es_files[constants.ES_PARAMETERS_FILE] = True
|
1497 | 938adc87 | Constantinos Venetsanopoulos | |
1498 | 938adc87 | Constantinos Venetsanopoulos | for (filename, _) in es_files.items(): |
1499 | 376631d1 | Constantinos Venetsanopoulos | es_files[filename] = utils.PathJoin(es_dir, filename) |
1500 | 376631d1 | Constantinos Venetsanopoulos | |
1501 | 376631d1 | Constantinos Venetsanopoulos | try:
|
1502 | 376631d1 | Constantinos Venetsanopoulos | st = os.stat(es_files[filename]) |
1503 | 376631d1 | Constantinos Venetsanopoulos | except EnvironmentError, err: |
1504 | 376631d1 | Constantinos Venetsanopoulos | return False, ("File '%s' under path '%s' is missing (%s)" % |
1505 | 376631d1 | Constantinos Venetsanopoulos | (filename, es_dir, utils.ErrnoOrStr(err))) |
1506 | 376631d1 | Constantinos Venetsanopoulos | |
1507 | 376631d1 | Constantinos Venetsanopoulos | if not stat.S_ISREG(stat.S_IFMT(st.st_mode)): |
1508 | 376631d1 | Constantinos Venetsanopoulos | return False, ("File '%s' under path '%s' is not a regular file" % |
1509 | 376631d1 | Constantinos Venetsanopoulos | (filename, es_dir)) |
1510 | 376631d1 | Constantinos Venetsanopoulos | |
1511 | 376631d1 | Constantinos Venetsanopoulos | if filename in constants.ES_SCRIPTS: |
1512 | 376631d1 | Constantinos Venetsanopoulos | if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
|
1513 | 376631d1 | Constantinos Venetsanopoulos | return False, ("File '%s' under path '%s' is not executable" % |
1514 | 376631d1 | Constantinos Venetsanopoulos | (filename, es_dir)) |
1515 | 376631d1 | Constantinos Venetsanopoulos | |
1516 | 938adc87 | Constantinos Venetsanopoulos | parameters = [] |
1517 | 938adc87 | Constantinos Venetsanopoulos | if constants.ES_PARAMETERS_FILE in es_files: |
1518 | 938adc87 | Constantinos Venetsanopoulos | parameters_file = es_files[constants.ES_PARAMETERS_FILE] |
1519 | 938adc87 | Constantinos Venetsanopoulos | try:
|
1520 | 938adc87 | Constantinos Venetsanopoulos | parameters = utils.ReadFile(parameters_file).splitlines() |
1521 | 938adc87 | Constantinos Venetsanopoulos | except EnvironmentError, err: |
1522 | 938adc87 | Constantinos Venetsanopoulos | return False, ("Error while reading the EXT parameters file at %s: %s" % |
1523 | 938adc87 | Constantinos Venetsanopoulos | (parameters_file, utils.ErrnoOrStr(err))) |
1524 | 938adc87 | Constantinos Venetsanopoulos | parameters = [v.split(None, 1) for v in parameters] |
1525 | 938adc87 | Constantinos Venetsanopoulos | |
1526 | 376631d1 | Constantinos Venetsanopoulos | es_obj = \ |
1527 | 376631d1 | Constantinos Venetsanopoulos | objects.ExtStorage(name=name, path=es_dir, |
1528 | 376631d1 | Constantinos Venetsanopoulos | create_script=es_files[constants.ES_SCRIPT_CREATE], |
1529 | 376631d1 | Constantinos Venetsanopoulos | remove_script=es_files[constants.ES_SCRIPT_REMOVE], |
1530 | 376631d1 | Constantinos Venetsanopoulos | grow_script=es_files[constants.ES_SCRIPT_GROW], |
1531 | 376631d1 | Constantinos Venetsanopoulos | attach_script=es_files[constants.ES_SCRIPT_ATTACH], |
1532 | 376631d1 | Constantinos Venetsanopoulos | detach_script=es_files[constants.ES_SCRIPT_DETACH], |
1533 | 938adc87 | Constantinos Venetsanopoulos | setinfo_script=es_files[constants.ES_SCRIPT_SETINFO], |
1534 | 938adc87 | Constantinos Venetsanopoulos | verify_script=es_files[constants.ES_SCRIPT_VERIFY], |
1535 | 938adc87 | Constantinos Venetsanopoulos | supported_parameters=parameters) |
1536 | 376631d1 | Constantinos Venetsanopoulos | return True, es_obj |
1537 | 376631d1 | Constantinos Venetsanopoulos | |
1538 | 376631d1 | Constantinos Venetsanopoulos | |
1539 | 938adc87 | Constantinos Venetsanopoulos | def _ExtStorageEnvironment(unique_id, ext_params, |
1540 | 702c3270 | Dimitris Aragiorgis | size=None, grow=None, metadata=None, |
1541 | 702c3270 | Dimitris Aragiorgis | name=None, uuid=None): |
1542 | 376631d1 | Constantinos Venetsanopoulos | """Calculate the environment for an External Storage script.
|
1543 | 376631d1 | Constantinos Venetsanopoulos |
|
1544 | 376631d1 | Constantinos Venetsanopoulos | @type unique_id: tuple (driver, vol_name)
|
1545 | 376631d1 | Constantinos Venetsanopoulos | @param unique_id: ExtStorage pool and name of the Volume
|
1546 | 938adc87 | Constantinos Venetsanopoulos | @type ext_params: dict
|
1547 | 938adc87 | Constantinos Venetsanopoulos | @param ext_params: the EXT parameters
|
1548 | 376631d1 | Constantinos Venetsanopoulos | @type size: string
|
1549 | 376631d1 | Constantinos Venetsanopoulos | @param size: size of the Volume (in mebibytes)
|
1550 | 376631d1 | Constantinos Venetsanopoulos | @type grow: string
|
1551 | 376631d1 | Constantinos Venetsanopoulos | @param grow: new size of Volume after grow (in mebibytes)
|
1552 | 376631d1 | Constantinos Venetsanopoulos | @type metadata: string
|
1553 | 376631d1 | Constantinos Venetsanopoulos | @param metadata: metadata info of the Volume
|
1554 | 702c3270 | Dimitris Aragiorgis | @type name: string
|
1555 | 702c3270 | Dimitris Aragiorgis | @param name: name of the Volume (objects.Disk.name)
|
1556 | 702c3270 | Dimitris Aragiorgis | @type uuid: string
|
1557 | 702c3270 | Dimitris Aragiorgis | @param uuid: uuid of the Volume (objects.Disk.uuid)
|
1558 | 376631d1 | Constantinos Venetsanopoulos | @rtype: dict
|
1559 | 376631d1 | Constantinos Venetsanopoulos | @return: dict of environment variables
|
1560 | 376631d1 | Constantinos Venetsanopoulos |
|
1561 | 376631d1 | Constantinos Venetsanopoulos | """
|
1562 | 376631d1 | Constantinos Venetsanopoulos | vol_name = unique_id[1]
|
1563 | 376631d1 | Constantinos Venetsanopoulos | |
1564 | 376631d1 | Constantinos Venetsanopoulos | result = {} |
1565 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_NAME"] = vol_name
|
1566 | 376631d1 | Constantinos Venetsanopoulos | |
1567 | 938adc87 | Constantinos Venetsanopoulos | # EXT params
|
1568 | 938adc87 | Constantinos Venetsanopoulos | for pname, pvalue in ext_params.items(): |
1569 | 938adc87 | Constantinos Venetsanopoulos | result["EXTP_%s" % pname.upper()] = str(pvalue) |
1570 | 938adc87 | Constantinos Venetsanopoulos | |
1571 | 376631d1 | Constantinos Venetsanopoulos | if size is not None: |
1572 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_SIZE"] = size
|
1573 | 376631d1 | Constantinos Venetsanopoulos | |
1574 | 376631d1 | Constantinos Venetsanopoulos | if grow is not None: |
1575 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_NEW_SIZE"] = grow
|
1576 | 376631d1 | Constantinos Venetsanopoulos | |
1577 | 376631d1 | Constantinos Venetsanopoulos | if metadata is not None: |
1578 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_METADATA"] = metadata
|
1579 | 376631d1 | Constantinos Venetsanopoulos | |
1580 | 702c3270 | Dimitris Aragiorgis | if name is not None: |
1581 | 702c3270 | Dimitris Aragiorgis | result["VOL_CNAME"] = name
|
1582 | 702c3270 | Dimitris Aragiorgis | |
1583 | 702c3270 | Dimitris Aragiorgis | if uuid is not None: |
1584 | 702c3270 | Dimitris Aragiorgis | result["VOL_UUID"] = uuid
|
1585 | 702c3270 | Dimitris Aragiorgis | |
1586 | 376631d1 | Constantinos Venetsanopoulos | return result
|
1587 | 376631d1 | Constantinos Venetsanopoulos | |
1588 | 376631d1 | Constantinos Venetsanopoulos | |
1589 | 376631d1 | Constantinos Venetsanopoulos | def _VolumeLogName(kind, es_name, volume): |
1590 | 376631d1 | Constantinos Venetsanopoulos | """Compute the ExtStorage log filename for a given Volume and operation.
|
1591 | 376631d1 | Constantinos Venetsanopoulos |
|
1592 | 376631d1 | Constantinos Venetsanopoulos | @type kind: string
|
1593 | 376631d1 | Constantinos Venetsanopoulos | @param kind: the operation type (e.g. create, remove etc.)
|
1594 | 376631d1 | Constantinos Venetsanopoulos | @type es_name: string
|
1595 | 376631d1 | Constantinos Venetsanopoulos | @param es_name: the ExtStorage name
|
1596 | 376631d1 | Constantinos Venetsanopoulos | @type volume: string
|
1597 | 376631d1 | Constantinos Venetsanopoulos | @param volume: the name of the Volume inside the External Storage
|
1598 | 376631d1 | Constantinos Venetsanopoulos |
|
1599 | 376631d1 | Constantinos Venetsanopoulos | """
|
1600 | 376631d1 | Constantinos Venetsanopoulos | # Check if the extstorage log dir is a valid dir
|
1601 | 376631d1 | Constantinos Venetsanopoulos | if not os.path.isdir(pathutils.LOG_ES_DIR): |
1602 | 89ff748d | Thomas Thrainer | base.ThrowError("Cannot find log directory: %s", pathutils.LOG_ES_DIR)
|
1603 | 376631d1 | Constantinos Venetsanopoulos | |
1604 | 376631d1 | Constantinos Venetsanopoulos | # TODO: Use tempfile.mkstemp to create unique filename
|
1605 | 89ff748d | Thomas Thrainer | basename = ("%s-%s-%s-%s.log" %
|
1606 | 89ff748d | Thomas Thrainer | (kind, es_name, volume, utils.TimestampForFilename())) |
1607 | 89ff748d | Thomas Thrainer | return utils.PathJoin(pathutils.LOG_ES_DIR, basename)
|
1608 | 376631d1 | Constantinos Venetsanopoulos | |
1609 | 376631d1 | Constantinos Venetsanopoulos | |
1610 | 94dcbdb0 | Andrea Spadaccini | def _VerifyDiskType(dev_type): |
1611 | 94dcbdb0 | Andrea Spadaccini | if dev_type not in DEV_MAP: |
1612 | 94dcbdb0 | Andrea Spadaccini | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1613 | 94dcbdb0 | Andrea Spadaccini | |
1614 | 94dcbdb0 | Andrea Spadaccini | |
1615 | 5ff82cc9 | René Nussbaumer | def _VerifyDiskParams(disk): |
1616 | 5ff82cc9 | René Nussbaumer | """Verifies if all disk parameters are set.
|
1617 | 5ff82cc9 | René Nussbaumer |
|
1618 | 5ff82cc9 | René Nussbaumer | """
|
1619 | 6da90c0a | Helga Velroyen | missing = set(constants.DISK_LD_DEFAULTS[disk.dev_type]) - set(disk.params) |
1620 | 5ff82cc9 | René Nussbaumer | if missing:
|
1621 | 5ff82cc9 | René Nussbaumer | raise errors.ProgrammerError("Block device is missing disk parameters: %s" % |
1622 | 5ff82cc9 | René Nussbaumer | missing) |
1623 | 5ff82cc9 | René Nussbaumer | |
1624 | 5ff82cc9 | René Nussbaumer | |
1625 | 94dcbdb0 | Andrea Spadaccini | def FindDevice(disk, children): |
1626 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
1627 | a8083063 | Iustin Pop |
|
1628 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
1629 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
1630 | a8083063 | Iustin Pop |
|
1631 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
1632 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to find
|
1633 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
1634 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
1635 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
1636 | 94dcbdb0 | Andrea Spadaccini |
|
1637 | a8083063 | Iustin Pop | """
|
1638 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
1639 | 0c3d9c7c | Thomas Thrainer | device = DEV_MAP[disk.dev_type](disk.logical_id, children, disk.size, |
1640 | 702c3270 | Dimitris Aragiorgis | disk.params, disk.dynamic_params, |
1641 | 702c3270 | Dimitris Aragiorgis | disk.name, disk.uuid) |
1642 | cb999543 | Iustin Pop | if not device.attached: |
1643 | a8083063 | Iustin Pop | return None |
1644 | ecb091e3 | Iustin Pop | return device
|
1645 | a8083063 | Iustin Pop | |
1646 | a8083063 | Iustin Pop | |
1647 | 94dcbdb0 | Andrea Spadaccini | def Assemble(disk, children): |
1648 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
1649 | a8083063 | Iustin Pop |
|
1650 | f96e3c4f | Iustin Pop | This will attach to assemble the device, as needed, to bring it
|
1651 | f96e3c4f | Iustin Pop | fully up. It must be safe to run on already-assembled devices.
|
1652 | a8083063 | Iustin Pop |
|
1653 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
1654 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to assemble
|
1655 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
1656 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
1657 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
1658 | 94dcbdb0 | Andrea Spadaccini |
|
1659 | a8083063 | Iustin Pop | """
|
1660 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
1661 | 5ff82cc9 | René Nussbaumer | _VerifyDiskParams(disk) |
1662 | 0c3d9c7c | Thomas Thrainer | device = DEV_MAP[disk.dev_type](disk.logical_id, children, disk.size, |
1663 | 702c3270 | Dimitris Aragiorgis | disk.params, disk.dynamic_params, |
1664 | 702c3270 | Dimitris Aragiorgis | disk.name, disk.uuid) |
1665 | 1063abd1 | Iustin Pop | device.Assemble() |
1666 | a8083063 | Iustin Pop | return device
|
1667 | a8083063 | Iustin Pop | |
1668 | a8083063 | Iustin Pop | |
1669 | ee1478e5 | Bernardo Dal Seno | def Create(disk, children, excl_stor): |
1670 | a8083063 | Iustin Pop | """Create a device.
|
1671 | a8083063 | Iustin Pop |
|
1672 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
1673 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to create
|
1674 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
1675 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
1676 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
1677 | ee1478e5 | Bernardo Dal Seno | @type excl_stor: boolean
|
1678 | ee1478e5 | Bernardo Dal Seno | @param excl_stor: Whether exclusive_storage is active
|
1679 | 5073fa0c | Bernardo Dal Seno | @rtype: L{bdev.BlockDev}
|
1680 | 5073fa0c | Bernardo Dal Seno | @return: the created device, or C{None} in case of an error
|
1681 | 94dcbdb0 | Andrea Spadaccini |
|
1682 | a8083063 | Iustin Pop | """
|
1683 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
1684 | 5ff82cc9 | René Nussbaumer | _VerifyDiskParams(disk) |
1685 | 0c3d9c7c | Thomas Thrainer | device = DEV_MAP[disk.dev_type].Create(disk.logical_id, children, disk.size, |
1686 | 0c3d9c7c | Thomas Thrainer | disk.spindles, disk.params, excl_stor, |
1687 | 702c3270 | Dimitris Aragiorgis | disk.dynamic_params, |
1688 | 702c3270 | Dimitris Aragiorgis | disk.name, disk.uuid) |
1689 | a8083063 | Iustin Pop | return device
|
1690 | e7d34815 | Santi Raffa | |
1691 | e7d34815 | Santi Raffa | # Please keep this at the bottom of the file for visibility.
|
1692 | e7d34815 | Santi Raffa | DEV_MAP = { |
1693 | e7d34815 | Santi Raffa | constants.DT_PLAIN: LogicalVolume, |
1694 | e7d34815 | Santi Raffa | constants.DT_DRBD8: drbd.DRBD8Dev, |
1695 | e7d34815 | Santi Raffa | constants.DT_BLOCK: PersistentBlockDevice, |
1696 | e7d34815 | Santi Raffa | constants.DT_RBD: RADOSBlockDevice, |
1697 | e7d34815 | Santi Raffa | constants.DT_EXT: ExtStorageDevice, |
1698 | e7d34815 | Santi Raffa | constants.DT_FILE: FileStorage, |
1699 | e7d34815 | Santi Raffa | constants.DT_SHARED_FILE: FileStorage, |
1700 | 8106dd64 | Santi Raffa | constants.DT_GLUSTER: GlusterStorage, |
1701 | e7d34815 | Santi Raffa | } |
1702 | e7d34815 | Santi Raffa | """Map disk types to disk type classes.
|
1703 | e7d34815 | Santi Raffa |
|
1704 | e7d34815 | Santi Raffa | @see: L{Assemble}, L{FindDevice}, L{Create}.""" # pylint: disable=W0105 |