root / lib / storage / bdev.py @ 78f99abb
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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 | a8083063 | Iustin Pop | """Block device abstraction"""
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23 | a8083063 | Iustin Pop | |
24 | a8083063 | Iustin Pop | import re |
25 | a8083063 | Iustin Pop | import errno |
26 | b6135bbc | Apollon Oikonomopoulos | import stat |
27 | 6f695a2e | Manuel Franceschini | import os |
28 | 468c5f77 | Iustin Pop | import logging |
29 | 63c73073 | Bernardo Dal Seno | import math |
30 | a8083063 | Iustin Pop | |
31 | a8083063 | Iustin Pop | from ganeti import utils |
32 | a8083063 | Iustin Pop | from ganeti import errors |
33 | fe96220b | Iustin Pop | from ganeti import constants |
34 | 96acbc09 | Michael Hanselmann | from ganeti import objects |
35 | cea881e5 | Michael Hanselmann | from ganeti import compat |
36 | fbdac0d9 | Michael Hanselmann | from ganeti import pathutils |
37 | bdecfea2 | Stratos Psomadakis | from ganeti import serializer |
38 | cde49218 | Helga Velroyen | from ganeti.storage import base |
39 | 13a6c760 | Helga Velroyen | from ganeti.storage import drbd |
40 | 13a6c760 | Helga Velroyen | from ganeti.storage import filestorage |
41 | 310fbb64 | Iustin Pop | |
42 | 310fbb64 | Iustin Pop | |
43 | bdecfea2 | Stratos Psomadakis | class RbdShowmappedJsonError(Exception): |
44 | bdecfea2 | Stratos Psomadakis | """`rbd showmmapped' JSON formatting error Exception class.
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45 | bdecfea2 | Stratos Psomadakis |
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46 | bdecfea2 | Stratos Psomadakis | """
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47 | bdecfea2 | Stratos Psomadakis | pass
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48 | bdecfea2 | Stratos Psomadakis | |
49 | bdecfea2 | Stratos Psomadakis | |
50 | e398546b | Iustin Pop | def _CheckResult(result): |
51 | e398546b | Iustin Pop | """Throws an error if the given result is a failed one.
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52 | e398546b | Iustin Pop |
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53 | e398546b | Iustin Pop | @param result: result from RunCmd
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54 | e398546b | Iustin Pop |
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55 | e398546b | Iustin Pop | """
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56 | e398546b | Iustin Pop | if result.failed:
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57 | 89ff748d | Thomas Thrainer | base.ThrowError("Command: %s error: %s - %s",
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58 | 89ff748d | Thomas Thrainer | result.cmd, result.fail_reason, result.output) |
59 | 310fbb64 | Iustin Pop | |
60 | 310fbb64 | Iustin Pop | |
61 | 89ff748d | Thomas Thrainer | class LogicalVolume(base.BlockDev): |
62 | a8083063 | Iustin Pop | """Logical Volume block device.
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63 | a8083063 | Iustin Pop |
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64 | a8083063 | Iustin Pop | """
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65 | 6136f8f0 | Iustin Pop | _VALID_NAME_RE = re.compile("^[a-zA-Z0-9+_.-]*$")
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66 | 78f99abb | Michele Tartara | _PARSE_PV_DEV_RE = re.compile(r"^([^ ()]+)\([0-9]+\)$")
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67 | b8028dcf | Michael Hanselmann | _INVALID_NAMES = compat.UniqueFrozenset([".", "..", "snapshot", "pvmove"]) |
68 | b8028dcf | Michael Hanselmann | _INVALID_SUBSTRINGS = compat.UniqueFrozenset(["_mlog", "_mimage"]) |
69 | 6136f8f0 | Iustin Pop | |
70 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
71 | a8083063 | Iustin Pop | """Attaches to a LV device.
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72 | a8083063 | Iustin Pop |
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73 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
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74 | a8083063 | Iustin Pop |
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75 | a8083063 | Iustin Pop | """
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76 | 94dcbdb0 | Andrea Spadaccini | super(LogicalVolume, self).__init__(unique_id, children, size, params) |
77 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
78 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
79 | a8083063 | Iustin Pop | self._vg_name, self._lv_name = unique_id |
80 | 6136f8f0 | Iustin Pop | self._ValidateName(self._vg_name) |
81 | 6136f8f0 | Iustin Pop | self._ValidateName(self._lv_name) |
82 | 6136f8f0 | Iustin Pop | self.dev_path = utils.PathJoin("/dev", self._vg_name, self._lv_name) |
83 | 99e8295c | Iustin Pop | self._degraded = True |
84 | 38256320 | Iustin Pop | self.major = self.minor = self.pe_size = self.stripe_count = None |
85 | b5d48e87 | Bernardo Dal Seno | self.pv_names = None |
86 | a8083063 | Iustin Pop | self.Attach()
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87 | a8083063 | Iustin Pop | |
88 | 63c73073 | Bernardo Dal Seno | @staticmethod
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89 | 63c73073 | Bernardo Dal Seno | def _GetStdPvSize(pvs_info): |
90 | 63c73073 | Bernardo Dal Seno | """Return the the standard PV size (used with exclusive storage).
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91 | 63c73073 | Bernardo Dal Seno |
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92 | 63c73073 | Bernardo Dal Seno | @param pvs_info: list of objects.LvmPvInfo, cannot be empty
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93 | 63c73073 | Bernardo Dal Seno | @rtype: float
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94 | 63c73073 | Bernardo Dal Seno | @return: size in MiB
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95 | 63c73073 | Bernardo Dal Seno |
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96 | 63c73073 | Bernardo Dal Seno | """
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97 | 63c73073 | Bernardo Dal Seno | assert len(pvs_info) > 0 |
98 | 63c73073 | Bernardo Dal Seno | smallest = min([pv.size for pv in pvs_info]) |
99 | 63c73073 | Bernardo Dal Seno | return smallest / (1 + constants.PART_MARGIN + constants.PART_RESERVED) |
100 | 63c73073 | Bernardo Dal Seno | |
101 | 63c73073 | Bernardo Dal Seno | @staticmethod
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102 | 63c73073 | Bernardo Dal Seno | def _ComputeNumPvs(size, pvs_info): |
103 | 63c73073 | Bernardo Dal Seno | """Compute the number of PVs needed for an LV (with exclusive storage).
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104 | 63c73073 | Bernardo Dal Seno |
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105 | 63c73073 | Bernardo Dal Seno | @type size: float
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106 | 23d95cff | Bernardo Dal Seno | @param size: LV size in MiB
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107 | 63c73073 | Bernardo Dal Seno | @param pvs_info: list of objects.LvmPvInfo, cannot be empty
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108 | 63c73073 | Bernardo Dal Seno | @rtype: integer
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109 | 63c73073 | Bernardo Dal Seno | @return: number of PVs needed
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110 | 63c73073 | Bernardo Dal Seno | """
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111 | 63c73073 | Bernardo Dal Seno | assert len(pvs_info) > 0 |
112 | 63c73073 | Bernardo Dal Seno | pv_size = float(LogicalVolume._GetStdPvSize(pvs_info))
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113 | 63c73073 | Bernardo Dal Seno | return int(math.ceil(float(size) / pv_size)) |
114 | 63c73073 | Bernardo Dal Seno | |
115 | 63c73073 | Bernardo Dal Seno | @staticmethod
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116 | 63c73073 | Bernardo Dal Seno | def _GetEmptyPvNames(pvs_info, max_pvs=None): |
117 | 63c73073 | Bernardo Dal Seno | """Return a list of empty PVs, by name.
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118 | 63c73073 | Bernardo Dal Seno |
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119 | 63c73073 | Bernardo Dal Seno | """
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120 | 63c73073 | Bernardo Dal Seno | empty_pvs = filter(objects.LvmPvInfo.IsEmpty, pvs_info)
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121 | 63c73073 | Bernardo Dal Seno | if max_pvs is not None: |
122 | 63c73073 | Bernardo Dal Seno | empty_pvs = empty_pvs[:max_pvs] |
123 | 63c73073 | Bernardo Dal Seno | return map((lambda pv: pv.name), empty_pvs) |
124 | 63c73073 | Bernardo Dal Seno | |
125 | a8083063 | Iustin Pop | @classmethod
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126 | 24c06acb | Bernardo Dal Seno | def Create(cls, unique_id, children, size, spindles, params, excl_stor): |
127 | a8083063 | Iustin Pop | """Create a new logical volume.
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128 | a8083063 | Iustin Pop |
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129 | a8083063 | Iustin Pop | """
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130 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
131 | 6c626518 | Iustin Pop | raise errors.ProgrammerError("Invalid configuration data %s" % |
132 | 6c626518 | Iustin Pop | str(unique_id))
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133 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
134 | 6136f8f0 | Iustin Pop | cls._ValidateName(vg_name) |
135 | 6136f8f0 | Iustin Pop | cls._ValidateName(lv_name) |
136 | 2070598f | Iustin Pop | pvs_info = cls.GetPVInfo([vg_name]) |
137 | a8083063 | Iustin Pop | if not pvs_info: |
138 | 63c73073 | Bernardo Dal Seno | if excl_stor:
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139 | 63c73073 | Bernardo Dal Seno | msg = "No (empty) PVs found"
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140 | 63c73073 | Bernardo Dal Seno | else:
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141 | 63c73073 | Bernardo Dal Seno | msg = "Can't compute PV info for vg %s" % vg_name
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142 | 89ff748d | Thomas Thrainer | base.ThrowError(msg) |
143 | 59726e15 | Bernardo Dal Seno | pvs_info.sort(key=(lambda pv: pv.free), reverse=True) |
144 | 5b7b5d49 | Guido Trotter | |
145 | 59726e15 | Bernardo Dal Seno | pvlist = [pv.name for pv in pvs_info] |
146 | 403f5172 | Guido Trotter | if compat.any(":" in v for v in pvlist): |
147 | 89ff748d | Thomas Thrainer | base.ThrowError("Some of your PVs have the invalid character ':' in their"
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148 | 89ff748d | Thomas Thrainer | " name, this is not supported - please filter them out"
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149 | 89ff748d | Thomas Thrainer | " in lvm.conf using either 'filter' or 'preferred_names'")
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150 | 63c73073 | Bernardo Dal Seno | |
151 | fecbe9d5 | Iustin Pop | current_pvs = len(pvlist)
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152 | ac00bf1b | Andrea Spadaccini | desired_stripes = params[constants.LDP_STRIPES] |
153 | 43e11798 | Andrea Spadaccini | stripes = min(current_pvs, desired_stripes)
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154 | 63c73073 | Bernardo Dal Seno | |
155 | 63c73073 | Bernardo Dal Seno | if excl_stor:
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156 | 7c848a6a | Bernardo Dal Seno | if spindles is None: |
157 | 7c848a6a | Bernardo Dal Seno | base.ThrowError("Unspecified number of spindles: this is required"
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158 | 7c848a6a | Bernardo Dal Seno | "when exclusive storage is enabled, try running"
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159 | 7c848a6a | Bernardo Dal Seno | " gnt-cluster repair-disk-sizes")
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160 | 11064155 | Bernardo Dal Seno | (err_msgs, _) = utils.LvmExclusiveCheckNodePvs(pvs_info) |
161 | 63c73073 | Bernardo Dal Seno | if err_msgs:
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162 | 63c73073 | Bernardo Dal Seno | for m in err_msgs: |
163 | 63c73073 | Bernardo Dal Seno | logging.warning(m) |
164 | 63c73073 | Bernardo Dal Seno | req_pvs = cls._ComputeNumPvs(size, pvs_info) |
165 | 7c848a6a | Bernardo Dal Seno | if spindles < req_pvs:
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166 | 7c848a6a | Bernardo Dal Seno | base.ThrowError("Requested number of spindles (%s) is not enough for"
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167 | 7c848a6a | Bernardo Dal Seno | " a disk of %d MB (at least %d spindles needed)",
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168 | 7c848a6a | Bernardo Dal Seno | spindles, size, req_pvs) |
169 | 7c848a6a | Bernardo Dal Seno | else:
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170 | 7c848a6a | Bernardo Dal Seno | req_pvs = spindles |
171 | 63c73073 | Bernardo Dal Seno | pvlist = cls._GetEmptyPvNames(pvs_info, req_pvs) |
172 | 63c73073 | Bernardo Dal Seno | current_pvs = len(pvlist)
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173 | 63c73073 | Bernardo Dal Seno | if current_pvs < req_pvs:
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174 | 24c06acb | Bernardo Dal Seno | base.ThrowError("Not enough empty PVs (spindles) to create a disk of %d"
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175 | 24c06acb | Bernardo Dal Seno | " MB: %d available, %d needed",
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176 | 24c06acb | Bernardo Dal Seno | size, current_pvs, req_pvs) |
177 | 63c73073 | Bernardo Dal Seno | assert current_pvs == len(pvlist) |
178 | 577edf04 | Bernardo Dal Seno | # We must update stripes to be sure to use all the desired spindles
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179 | 577edf04 | Bernardo Dal Seno | stripes = current_pvs |
180 | 577edf04 | Bernardo Dal Seno | if stripes > desired_stripes:
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181 | 577edf04 | Bernardo Dal Seno | # Don't warn when lowering stripes, as it's no surprise
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182 | 577edf04 | Bernardo Dal Seno | logging.warning("Using %s stripes instead of %s, to be able to use"
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183 | 577edf04 | Bernardo Dal Seno | " %s spindles", stripes, desired_stripes, current_pvs)
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184 | 63c73073 | Bernardo Dal Seno | |
185 | 63c73073 | Bernardo Dal Seno | else:
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186 | 63c73073 | Bernardo Dal Seno | if stripes < desired_stripes:
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187 | 63c73073 | Bernardo Dal Seno | logging.warning("Could not use %d stripes for VG %s, as only %d PVs are"
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188 | 63c73073 | Bernardo Dal Seno | " available.", desired_stripes, vg_name, current_pvs)
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189 | 63c73073 | Bernardo Dal Seno | free_size = sum([pv.free for pv in pvs_info]) |
190 | 63c73073 | Bernardo Dal Seno | # The size constraint should have been checked from the master before
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191 | 63c73073 | Bernardo Dal Seno | # calling the create function.
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192 | 63c73073 | Bernardo Dal Seno | if free_size < size:
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193 | 89ff748d | Thomas Thrainer | base.ThrowError("Not enough free space: required %s,"
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194 | 89ff748d | Thomas Thrainer | " available %s", size, free_size)
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195 | 63c73073 | Bernardo Dal Seno | |
196 | fecbe9d5 | Iustin Pop | # If the free space is not well distributed, we won't be able to
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197 | fecbe9d5 | Iustin Pop | # create an optimally-striped volume; in that case, we want to try
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198 | fecbe9d5 | Iustin Pop | # with N, N-1, ..., 2, and finally 1 (non-stripped) number of
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199 | fecbe9d5 | Iustin Pop | # stripes
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200 | 63c73073 | Bernardo Dal Seno | cmd = ["lvcreate", "-L%dm" % size, "-n%s" % lv_name] |
201 | fecbe9d5 | Iustin Pop | for stripes_arg in range(stripes, 0, -1): |
202 | fecbe9d5 | Iustin Pop | result = utils.RunCmd(cmd + ["-i%d" % stripes_arg] + [vg_name] + pvlist)
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203 | fecbe9d5 | Iustin Pop | if not result.failed: |
204 | fecbe9d5 | Iustin Pop | break
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205 | a8083063 | Iustin Pop | if result.failed:
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206 | 89ff748d | Thomas Thrainer | base.ThrowError("LV create failed (%s): %s",
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207 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
208 | 94dcbdb0 | Andrea Spadaccini | return LogicalVolume(unique_id, children, size, params)
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209 | a8083063 | Iustin Pop | |
210 | a8083063 | Iustin Pop | @staticmethod
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211 | 197478f2 | René Nussbaumer | def _GetVolumeInfo(lvm_cmd, fields): |
212 | 511e00b8 | Helga Velroyen | """Returns LVM Volume infos using lvm_cmd
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213 | 197478f2 | René Nussbaumer |
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214 | 197478f2 | René Nussbaumer | @param lvm_cmd: Should be one of "pvs", "vgs" or "lvs"
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215 | 197478f2 | René Nussbaumer | @param fields: Fields to return
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216 | 197478f2 | René Nussbaumer | @return: A list of dicts each with the parsed fields
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217 | 197478f2 | René Nussbaumer |
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218 | 197478f2 | René Nussbaumer | """
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219 | 197478f2 | René Nussbaumer | if not fields: |
220 | 197478f2 | René Nussbaumer | raise errors.ProgrammerError("No fields specified") |
221 | 197478f2 | René Nussbaumer | |
222 | 197478f2 | René Nussbaumer | sep = "|"
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223 | 197478f2 | René Nussbaumer | cmd = [lvm_cmd, "--noheadings", "--nosuffix", "--units=m", "--unbuffered", |
224 | 197478f2 | René Nussbaumer | "--separator=%s" % sep, "-o%s" % ",".join(fields)] |
225 | 197478f2 | René Nussbaumer | |
226 | 197478f2 | René Nussbaumer | result = utils.RunCmd(cmd) |
227 | 197478f2 | René Nussbaumer | if result.failed:
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228 | 197478f2 | René Nussbaumer | raise errors.CommandError("Can't get the volume information: %s - %s" % |
229 | 197478f2 | René Nussbaumer | (result.fail_reason, result.output)) |
230 | 197478f2 | René Nussbaumer | |
231 | 197478f2 | René Nussbaumer | data = [] |
232 | 197478f2 | René Nussbaumer | for line in result.stdout.splitlines(): |
233 | 197478f2 | René Nussbaumer | splitted_fields = line.strip().split(sep) |
234 | 197478f2 | René Nussbaumer | |
235 | 197478f2 | René Nussbaumer | if len(fields) != len(splitted_fields): |
236 | 197478f2 | René Nussbaumer | raise errors.CommandError("Can't parse %s output: line '%s'" % |
237 | 197478f2 | René Nussbaumer | (lvm_cmd, line)) |
238 | 197478f2 | René Nussbaumer | |
239 | 197478f2 | René Nussbaumer | data.append(splitted_fields) |
240 | 197478f2 | René Nussbaumer | |
241 | 197478f2 | René Nussbaumer | return data
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242 | 197478f2 | René Nussbaumer | |
243 | 197478f2 | René Nussbaumer | @classmethod
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244 | b496abdb | Bernardo Dal Seno | def GetPVInfo(cls, vg_names, filter_allocatable=True, include_lvs=False): |
245 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
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246 | a8083063 | Iustin Pop |
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247 | 2070598f | Iustin Pop | @param vg_names: list of volume group names, if empty all will be returned
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248 | 2070598f | Iustin Pop | @param filter_allocatable: whether to skip over unallocatable PVs
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249 | b496abdb | Bernardo Dal Seno | @param include_lvs: whether to include a list of LVs hosted on each PV
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250 | a8083063 | Iustin Pop |
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251 | c41eea6e | Iustin Pop | @rtype: list
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252 | 59726e15 | Bernardo Dal Seno | @return: list of objects.LvmPvInfo objects
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253 | 098c0958 | Michael Hanselmann |
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254 | a8083063 | Iustin Pop | """
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255 | b496abdb | Bernardo Dal Seno | # We request "lv_name" field only if we care about LVs, so we don't get
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256 | b496abdb | Bernardo Dal Seno | # a long list of entries with many duplicates unless we really have to.
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257 | b496abdb | Bernardo Dal Seno | # The duplicate "pv_name" field will be ignored.
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258 | b496abdb | Bernardo Dal Seno | if include_lvs:
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259 | b496abdb | Bernardo Dal Seno | lvfield = "lv_name"
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260 | b496abdb | Bernardo Dal Seno | else:
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261 | b496abdb | Bernardo Dal Seno | lvfield = "pv_name"
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262 | 197478f2 | René Nussbaumer | try:
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263 | 197478f2 | René Nussbaumer | info = cls._GetVolumeInfo("pvs", ["pv_name", "vg_name", "pv_free", |
264 | b496abdb | Bernardo Dal Seno | "pv_attr", "pv_size", lvfield]) |
265 | 197478f2 | René Nussbaumer | except errors.GenericError, err:
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266 | 197478f2 | René Nussbaumer | logging.error("Can't get PV information: %s", err)
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267 | a8083063 | Iustin Pop | return None |
268 | 197478f2 | René Nussbaumer | |
269 | b496abdb | Bernardo Dal Seno | # When asked for LVs, "pvs" may return multiple entries for the same PV-LV
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270 | 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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271 | b496abdb | Bernardo Dal Seno | # out duplicates.
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272 | b496abdb | Bernardo Dal Seno | if include_lvs:
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273 | b496abdb | Bernardo Dal Seno | info.sort(key=(lambda i: (i[0], i[5]))) |
274 | a8083063 | Iustin Pop | data = [] |
275 | b496abdb | Bernardo Dal Seno | lastpvi = None
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276 | b496abdb | Bernardo Dal Seno | for (pv_name, vg_name, pv_free, pv_attr, pv_size, lv_name) in info: |
277 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not allocatable
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278 | 197478f2 | René Nussbaumer | if filter_allocatable and pv_attr[0] != "a": |
279 | a8083063 | Iustin Pop | continue
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280 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not in the right volume group(s)
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281 | 197478f2 | René Nussbaumer | if vg_names and vg_name not in vg_names: |
282 | 2070598f | Iustin Pop | continue
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283 | b496abdb | Bernardo Dal Seno | # Beware of duplicates (check before inserting)
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284 | b496abdb | Bernardo Dal Seno | if lastpvi and lastpvi.name == pv_name: |
285 | b496abdb | Bernardo Dal Seno | if include_lvs and lv_name: |
286 | b496abdb | Bernardo Dal Seno | if not lastpvi.lv_list or lastpvi.lv_list[-1] != lv_name: |
287 | b496abdb | Bernardo Dal Seno | lastpvi.lv_list.append(lv_name) |
288 | b496abdb | Bernardo Dal Seno | else:
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289 | b496abdb | Bernardo Dal Seno | if include_lvs and lv_name: |
290 | b496abdb | Bernardo Dal Seno | lvl = [lv_name] |
291 | b496abdb | Bernardo Dal Seno | else:
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292 | b496abdb | Bernardo Dal Seno | lvl = [] |
293 | b496abdb | Bernardo Dal Seno | lastpvi = objects.LvmPvInfo(name=pv_name, vg_name=vg_name, |
294 | b496abdb | Bernardo Dal Seno | size=float(pv_size), free=float(pv_free), |
295 | b496abdb | Bernardo Dal Seno | attributes=pv_attr, lv_list=lvl) |
296 | b496abdb | Bernardo Dal Seno | data.append(lastpvi) |
297 | 197478f2 | René Nussbaumer | |
298 | 197478f2 | René Nussbaumer | return data
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299 | 197478f2 | René Nussbaumer | |
300 | 197478f2 | René Nussbaumer | @classmethod
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301 | a1860404 | Bernardo Dal Seno | def _GetRawFreePvInfo(cls, vg_name): |
302 | a1860404 | Bernardo Dal Seno | """Return info (size/free) about PVs.
|
303 | a1860404 | Bernardo Dal Seno |
|
304 | a1860404 | Bernardo Dal Seno | @type vg_name: string
|
305 | a1860404 | Bernardo Dal Seno | @param vg_name: VG name
|
306 | a1860404 | Bernardo Dal Seno | @rtype: tuple
|
307 | a1860404 | Bernardo Dal Seno | @return: (standard_pv_size_in_MiB, number_of_free_pvs, total_number_of_pvs)
|
308 | a1860404 | Bernardo Dal Seno |
|
309 | a1860404 | Bernardo Dal Seno | """
|
310 | a1860404 | Bernardo Dal Seno | pvs_info = cls.GetPVInfo([vg_name]) |
311 | a1860404 | Bernardo Dal Seno | if not pvs_info: |
312 | a1860404 | Bernardo Dal Seno | pv_size = 0.0
|
313 | a1860404 | Bernardo Dal Seno | free_pvs = 0
|
314 | a1860404 | Bernardo Dal Seno | num_pvs = 0
|
315 | a1860404 | Bernardo Dal Seno | else:
|
316 | a1860404 | Bernardo Dal Seno | pv_size = cls._GetStdPvSize(pvs_info) |
317 | a1860404 | Bernardo Dal Seno | free_pvs = len(cls._GetEmptyPvNames(pvs_info))
|
318 | a1860404 | Bernardo Dal Seno | num_pvs = len(pvs_info)
|
319 | a1860404 | Bernardo Dal Seno | return (pv_size, free_pvs, num_pvs)
|
320 | a1860404 | Bernardo Dal Seno | |
321 | a1860404 | Bernardo Dal Seno | @classmethod
|
322 | 61481c52 | Bernardo Dal Seno | def _GetExclusiveStorageVgFree(cls, vg_name): |
323 | 61481c52 | Bernardo Dal Seno | """Return the free disk space in the given VG, in exclusive storage mode.
|
324 | 61481c52 | Bernardo Dal Seno |
|
325 | 61481c52 | Bernardo Dal Seno | @type vg_name: string
|
326 | 61481c52 | Bernardo Dal Seno | @param vg_name: VG name
|
327 | 61481c52 | Bernardo Dal Seno | @rtype: float
|
328 | 61481c52 | Bernardo Dal Seno | @return: free space in MiB
|
329 | 61481c52 | Bernardo Dal Seno | """
|
330 | a1860404 | Bernardo Dal Seno | (pv_size, free_pvs, _) = cls._GetRawFreePvInfo(vg_name) |
331 | a1860404 | Bernardo Dal Seno | return pv_size * free_pvs
|
332 | a1860404 | Bernardo Dal Seno | |
333 | a1860404 | Bernardo Dal Seno | @classmethod
|
334 | a1860404 | Bernardo Dal Seno | def GetVgSpindlesInfo(cls, vg_name): |
335 | a1860404 | Bernardo Dal Seno | """Get the free space info for specific VGs.
|
336 | a1860404 | Bernardo Dal Seno |
|
337 | a1860404 | Bernardo Dal Seno | @param vg_name: volume group name
|
338 | a1860404 | Bernardo Dal Seno | @rtype: tuple
|
339 | a1860404 | Bernardo Dal Seno | @return: (free_spindles, total_spindles)
|
340 | a1860404 | Bernardo Dal Seno |
|
341 | a1860404 | Bernardo Dal Seno | """
|
342 | a1860404 | Bernardo Dal Seno | (_, free_pvs, num_pvs) = cls._GetRawFreePvInfo(vg_name) |
343 | a1860404 | Bernardo Dal Seno | return (free_pvs, num_pvs)
|
344 | 61481c52 | Bernardo Dal Seno | |
345 | 61481c52 | Bernardo Dal Seno | @classmethod
|
346 | 1a3c5d4e | Bernardo Dal Seno | def GetVGInfo(cls, vg_names, excl_stor, filter_readonly=True): |
347 | 197478f2 | René Nussbaumer | """Get the free space info for specific VGs.
|
348 | 197478f2 | René Nussbaumer |
|
349 | 197478f2 | René Nussbaumer | @param vg_names: list of volume group names, if empty all will be returned
|
350 | 1a3c5d4e | Bernardo Dal Seno | @param excl_stor: whether exclusive_storage is enabled
|
351 | 197478f2 | René Nussbaumer | @param filter_readonly: whether to skip over readonly VGs
|
352 | 197478f2 | René Nussbaumer |
|
353 | 197478f2 | René Nussbaumer | @rtype: list
|
354 | 673cd9c4 | René Nussbaumer | @return: list of tuples (free_space, total_size, name) with free_space in
|
355 | 673cd9c4 | René Nussbaumer | MiB
|
356 | 197478f2 | René Nussbaumer |
|
357 | 197478f2 | René Nussbaumer | """
|
358 | 197478f2 | René Nussbaumer | try:
|
359 | 673cd9c4 | René Nussbaumer | info = cls._GetVolumeInfo("vgs", ["vg_name", "vg_free", "vg_attr", |
360 | 673cd9c4 | René Nussbaumer | "vg_size"])
|
361 | 197478f2 | René Nussbaumer | except errors.GenericError, err:
|
362 | 197478f2 | René Nussbaumer | logging.error("Can't get VG information: %s", err)
|
363 | 197478f2 | René Nussbaumer | return None |
364 | 197478f2 | René Nussbaumer | |
365 | 197478f2 | René Nussbaumer | data = [] |
366 | 673cd9c4 | René Nussbaumer | for vg_name, vg_free, vg_attr, vg_size in info: |
367 | 197478f2 | René Nussbaumer | # (possibly) skip over vgs which are not writable
|
368 | 197478f2 | René Nussbaumer | if filter_readonly and vg_attr[0] == "r": |
369 | 197478f2 | René Nussbaumer | continue
|
370 | 197478f2 | René Nussbaumer | # (possibly) skip over vgs which are not in the right volume group(s)
|
371 | 197478f2 | René Nussbaumer | if vg_names and vg_name not in vg_names: |
372 | 197478f2 | René Nussbaumer | continue
|
373 | 61481c52 | Bernardo Dal Seno | # Exclusive storage needs a different concept of free space
|
374 | 61481c52 | Bernardo Dal Seno | if excl_stor:
|
375 | 61481c52 | Bernardo Dal Seno | es_free = cls._GetExclusiveStorageVgFree(vg_name) |
376 | 61481c52 | Bernardo Dal Seno | assert es_free <= vg_free
|
377 | 61481c52 | Bernardo Dal Seno | vg_free = es_free |
378 | 673cd9c4 | René Nussbaumer | data.append((float(vg_free), float(vg_size), vg_name)) |
379 | a8083063 | Iustin Pop | |
380 | a8083063 | Iustin Pop | return data
|
381 | a8083063 | Iustin Pop | |
382 | 6136f8f0 | Iustin Pop | @classmethod
|
383 | 6136f8f0 | Iustin Pop | def _ValidateName(cls, name): |
384 | 6136f8f0 | Iustin Pop | """Validates that a given name is valid as VG or LV name.
|
385 | 6136f8f0 | Iustin Pop |
|
386 | 6136f8f0 | Iustin Pop | The list of valid characters and restricted names is taken out of
|
387 | 6136f8f0 | Iustin Pop | the lvm(8) manpage, with the simplification that we enforce both
|
388 | 6136f8f0 | Iustin Pop | VG and LV restrictions on the names.
|
389 | 6136f8f0 | Iustin Pop |
|
390 | 6136f8f0 | Iustin Pop | """
|
391 | 6136f8f0 | Iustin Pop | if (not cls._VALID_NAME_RE.match(name) or |
392 | 6136f8f0 | Iustin Pop | name in cls._INVALID_NAMES or |
393 | 403f5172 | Guido Trotter | compat.any(substring in name for substring in cls._INVALID_SUBSTRINGS)): |
394 | 89ff748d | Thomas Thrainer | base.ThrowError("Invalid LVM name '%s'", name)
|
395 | 6136f8f0 | Iustin Pop | |
396 | a8083063 | Iustin Pop | def Remove(self): |
397 | a8083063 | Iustin Pop | """Remove this logical volume.
|
398 | a8083063 | Iustin Pop |
|
399 | a8083063 | Iustin Pop | """
|
400 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
401 | a8083063 | Iustin Pop | # the LV does not exist
|
402 | 0c6c04ec | Iustin Pop | return
|
403 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
404 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
405 | a8083063 | Iustin Pop | if result.failed:
|
406 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't lvremove: %s - %s",
|
407 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
408 | a8083063 | Iustin Pop | |
409 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
410 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
411 | f3e513ad | Iustin Pop |
|
412 | f3e513ad | Iustin Pop | """
|
413 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
414 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
415 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
416 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
417 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
418 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
419 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
420 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
421 | f3e513ad | Iustin Pop | if result.failed:
|
422 | 89ff748d | Thomas Thrainer | base.ThrowError("Failed to rename the logical volume: %s", result.output)
|
423 | be345db0 | Iustin Pop | self._lv_name = new_name
|
424 | 6136f8f0 | Iustin Pop | self.dev_path = utils.PathJoin("/dev", self._vg_name, self._lv_name) |
425 | be345db0 | Iustin Pop | |
426 | 688b5752 | Bernardo Dal Seno | @classmethod
|
427 | 688b5752 | Bernardo Dal Seno | def _ParseLvInfoLine(cls, line, sep): |
428 | 688b5752 | Bernardo Dal Seno | """Parse one line of the lvs output used in L{_GetLvInfo}.
|
429 | a8083063 | Iustin Pop |
|
430 | a8083063 | Iustin Pop | """
|
431 | 688b5752 | Bernardo Dal Seno | elems = line.strip().rstrip(sep).split(sep) |
432 | b5d48e87 | Bernardo Dal Seno | if len(elems) != 6: |
433 | b5d48e87 | Bernardo Dal Seno | base.ThrowError("Can't parse LVS output, len(%s) != 6", str(elems)) |
434 | 99e8295c | Iustin Pop | |
435 | b5d48e87 | Bernardo Dal Seno | (status, major, minor, pe_size, stripes, pvs) = elems |
436 | 0304f0ec | Iustin Pop | if len(status) < 6: |
437 | 688b5752 | Bernardo Dal Seno | base.ThrowError("lvs lv_attr is not at least 6 characters (%s)", status)
|
438 | 99e8295c | Iustin Pop | |
439 | 99e8295c | Iustin Pop | try:
|
440 | 99e8295c | Iustin Pop | major = int(major)
|
441 | 99e8295c | Iustin Pop | minor = int(minor)
|
442 | 691744c4 | Iustin Pop | except (TypeError, ValueError), err: |
443 | 688b5752 | Bernardo Dal Seno | base.ThrowError("lvs major/minor cannot be parsed: %s", str(err)) |
444 | 99e8295c | Iustin Pop | |
445 | 38256320 | Iustin Pop | try:
|
446 | 38256320 | Iustin Pop | pe_size = int(float(pe_size)) |
447 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
448 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't parse vg extent size: %s", err)
|
449 | 38256320 | Iustin Pop | |
450 | 38256320 | Iustin Pop | try:
|
451 | 38256320 | Iustin Pop | stripes = int(stripes)
|
452 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
453 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't parse the number of stripes: %s", err)
|
454 | 688b5752 | Bernardo Dal Seno | |
455 | b5d48e87 | Bernardo Dal Seno | pv_names = [] |
456 | b5d48e87 | Bernardo Dal Seno | for pv in pvs.split(","): |
457 | b5d48e87 | Bernardo Dal Seno | m = re.match(cls._PARSE_PV_DEV_RE, pv) |
458 | b5d48e87 | Bernardo Dal Seno | if not m: |
459 | b5d48e87 | Bernardo Dal Seno | base.ThrowError("Can't parse this device list: %s", pvs)
|
460 | b5d48e87 | Bernardo Dal Seno | pv_names.append(m.group(1))
|
461 | b5d48e87 | Bernardo Dal Seno | assert len(pv_names) > 0 |
462 | b5d48e87 | Bernardo Dal Seno | |
463 | b5d48e87 | Bernardo Dal Seno | return (status, major, minor, pe_size, stripes, pv_names)
|
464 | 688b5752 | Bernardo Dal Seno | |
465 | 688b5752 | Bernardo Dal Seno | @classmethod
|
466 | 688b5752 | Bernardo Dal Seno | def _GetLvInfo(cls, dev_path, _run_cmd=utils.RunCmd): |
467 | 688b5752 | Bernardo Dal Seno | """Get info about the given existing LV to be used.
|
468 | 688b5752 | Bernardo Dal Seno |
|
469 | 688b5752 | Bernardo Dal Seno | """
|
470 | b5d48e87 | Bernardo Dal Seno | sep = "|"
|
471 | b5d48e87 | Bernardo Dal Seno | result = _run_cmd(["lvs", "--noheadings", "--separator=%s" % sep, |
472 | 688b5752 | Bernardo Dal Seno | "--units=k", "--nosuffix", |
473 | 688b5752 | Bernardo Dal Seno | "-olv_attr,lv_kernel_major,lv_kernel_minor,"
|
474 | b5d48e87 | Bernardo Dal Seno | "vg_extent_size,stripes,devices", dev_path])
|
475 | 688b5752 | Bernardo Dal Seno | if result.failed:
|
476 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't find LV %s: %s, %s",
|
477 | 688b5752 | Bernardo Dal Seno | dev_path, result.fail_reason, result.output) |
478 | 688b5752 | Bernardo Dal Seno | # the output can (and will) have multiple lines for multi-segment
|
479 | 688b5752 | Bernardo Dal Seno | # LVs, as the 'stripes' parameter is a segment one, so we take
|
480 | 688b5752 | Bernardo Dal Seno | # only the last entry, which is the one we're interested in; note
|
481 | 688b5752 | Bernardo Dal Seno | # that with LVM2 anyway the 'stripes' value must be constant
|
482 | 688b5752 | Bernardo Dal Seno | # across segments, so this is a no-op actually
|
483 | 688b5752 | Bernardo Dal Seno | out = result.stdout.splitlines() |
484 | 688b5752 | Bernardo Dal Seno | if not out: # totally empty result? splitlines() returns at least |
485 | 688b5752 | Bernardo Dal Seno | # one line for any non-empty string
|
486 | 688b5752 | Bernardo Dal Seno | base.ThrowError("Can't parse LVS output, no lines? Got '%s'", str(out)) |
487 | b5d48e87 | Bernardo Dal Seno | pv_names = set()
|
488 | b5d48e87 | Bernardo Dal Seno | for line in out: |
489 | b5d48e87 | Bernardo Dal Seno | (status, major, minor, pe_size, stripes, more_pvs) = \ |
490 | b5d48e87 | Bernardo Dal Seno | cls._ParseLvInfoLine(line, sep) |
491 | b5d48e87 | Bernardo Dal Seno | pv_names.update(more_pvs) |
492 | b5d48e87 | Bernardo Dal Seno | return (status, major, minor, pe_size, stripes, pv_names)
|
493 | 688b5752 | Bernardo Dal Seno | |
494 | 688b5752 | Bernardo Dal Seno | def Attach(self): |
495 | 688b5752 | Bernardo Dal Seno | """Attach to an existing LV.
|
496 | 688b5752 | Bernardo Dal Seno |
|
497 | 688b5752 | Bernardo Dal Seno | This method will try to see if an existing and active LV exists
|
498 | 688b5752 | Bernardo Dal Seno | which matches our name. If so, its major/minor will be
|
499 | 688b5752 | Bernardo Dal Seno | recorded.
|
500 | 688b5752 | Bernardo Dal Seno |
|
501 | 688b5752 | Bernardo Dal Seno | """
|
502 | 688b5752 | Bernardo Dal Seno | self.attached = False |
503 | 688b5752 | Bernardo Dal Seno | try:
|
504 | b5d48e87 | Bernardo Dal Seno | (status, major, minor, pe_size, stripes, pv_names) = \ |
505 | 688b5752 | Bernardo Dal Seno | self._GetLvInfo(self.dev_path) |
506 | 688b5752 | Bernardo Dal Seno | except errors.BlockDeviceError:
|
507 | 38256320 | Iustin Pop | return False |
508 | 38256320 | Iustin Pop | |
509 | 99e8295c | Iustin Pop | self.major = major
|
510 | 99e8295c | Iustin Pop | self.minor = minor
|
511 | 38256320 | Iustin Pop | self.pe_size = pe_size
|
512 | 38256320 | Iustin Pop | self.stripe_count = stripes
|
513 | d0c8c01d | Iustin Pop | self._degraded = status[0] == "v" # virtual volume, i.e. doesn't backing |
514 | 99e8295c | Iustin Pop | # storage
|
515 | b5d48e87 | Bernardo Dal Seno | self.pv_names = pv_names
|
516 | cb999543 | Iustin Pop | self.attached = True |
517 | 99e8295c | Iustin Pop | return True |
518 | a8083063 | Iustin Pop | |
519 | a8083063 | Iustin Pop | def Assemble(self): |
520 | a8083063 | Iustin Pop | """Assemble the device.
|
521 | a8083063 | Iustin Pop |
|
522 | 5bbd3f7f | Michael Hanselmann | We always run `lvchange -ay` on the LV to ensure it's active before
|
523 | 5574047a | Iustin Pop | use, as there were cases when xenvg was not active after boot
|
524 | 5574047a | Iustin Pop | (also possibly after disk issues).
|
525 | a8083063 | Iustin Pop |
|
526 | a8083063 | Iustin Pop | """
|
527 | 5574047a | Iustin Pop | result = utils.RunCmd(["lvchange", "-ay", self.dev_path]) |
528 | 5574047a | Iustin Pop | if result.failed:
|
529 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't activate lv %s: %s", self.dev_path, result.output) |
530 | a8083063 | Iustin Pop | |
531 | a8083063 | Iustin Pop | def Shutdown(self): |
532 | a8083063 | Iustin Pop | """Shutdown the device.
|
533 | a8083063 | Iustin Pop |
|
534 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
535 | a8083063 | Iustin Pop | volumes on shutdown.
|
536 | a8083063 | Iustin Pop |
|
537 | a8083063 | Iustin Pop | """
|
538 | 746f7476 | Iustin Pop | pass
|
539 | a8083063 | Iustin Pop | |
540 | 9db6dbce | Iustin Pop | def GetSyncStatus(self): |
541 | 9db6dbce | Iustin Pop | """Returns the sync status of the device.
|
542 | 9db6dbce | Iustin Pop |
|
543 | 9db6dbce | Iustin Pop | If this device is a mirroring device, this function returns the
|
544 | 9db6dbce | Iustin Pop | status of the mirror.
|
545 | 9db6dbce | Iustin Pop |
|
546 | 9db6dbce | Iustin Pop | For logical volumes, sync_percent and estimated_time are always
|
547 | 9db6dbce | Iustin Pop | None (no recovery in progress, as we don't handle the mirrored LV
|
548 | 0834c866 | Iustin Pop | case). The is_degraded parameter is the inverse of the ldisk
|
549 | 0834c866 | Iustin Pop | parameter.
|
550 | 9db6dbce | Iustin Pop |
|
551 | 0834c866 | Iustin Pop | For the ldisk parameter, we check if the logical volume has the
|
552 | 0834c866 | Iustin Pop | 'virtual' type, which means it's not backed by existing storage
|
553 | 0834c866 | Iustin Pop | anymore (read from it return I/O error). This happens after a
|
554 | 0834c866 | Iustin Pop | physical disk failure and subsequent 'vgreduce --removemissing' on
|
555 | 0834c866 | Iustin Pop | the volume group.
|
556 | 9db6dbce | Iustin Pop |
|
557 | 99e8295c | Iustin Pop | The status was already read in Attach, so we just return it.
|
558 | 99e8295c | Iustin Pop |
|
559 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
560 | c41eea6e | Iustin Pop |
|
561 | 9db6dbce | Iustin Pop | """
|
562 | f208978a | Michael Hanselmann | if self._degraded: |
563 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_FAULTY |
564 | f208978a | Michael Hanselmann | else:
|
565 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_OKAY |
566 | f208978a | Michael Hanselmann | |
567 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
568 | 96acbc09 | Michael Hanselmann | major=self.major,
|
569 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
570 | 96acbc09 | Michael Hanselmann | sync_percent=None,
|
571 | 96acbc09 | Michael Hanselmann | estimated_time=None,
|
572 | 96acbc09 | Michael Hanselmann | is_degraded=self._degraded,
|
573 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
574 | 9db6dbce | Iustin Pop | |
575 | a8083063 | Iustin Pop | def Open(self, force=False): |
576 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
577 | a8083063 | Iustin Pop |
|
578 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
579 | a8083063 | Iustin Pop |
|
580 | a8083063 | Iustin Pop | """
|
581 | fdbd668d | Iustin Pop | pass
|
582 | a8083063 | Iustin Pop | |
583 | a8083063 | Iustin Pop | def Close(self): |
584 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
585 | a8083063 | Iustin Pop |
|
586 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
587 | a8083063 | Iustin Pop |
|
588 | a8083063 | Iustin Pop | """
|
589 | fdbd668d | Iustin Pop | pass
|
590 | a8083063 | Iustin Pop | |
591 | a8083063 | Iustin Pop | def Snapshot(self, size): |
592 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
593 | a8083063 | Iustin Pop |
|
594 | 800ac399 | Iustin Pop | @returns: tuple (vg, lv)
|
595 | 800ac399 | Iustin Pop |
|
596 | a8083063 | Iustin Pop | """
|
597 | a8083063 | Iustin Pop | snap_name = self._lv_name + ".snap" |
598 | a8083063 | Iustin Pop | |
599 | a8083063 | Iustin Pop | # remove existing snapshot if found
|
600 | 94dcbdb0 | Andrea Spadaccini | snap = LogicalVolume((self._vg_name, snap_name), None, size, self.params) |
601 | 89ff748d | Thomas Thrainer | base.IgnoreError(snap.Remove) |
602 | a8083063 | Iustin Pop | |
603 | 1a3c5d4e | Bernardo Dal Seno | vg_info = self.GetVGInfo([self._vg_name], False) |
604 | 197478f2 | René Nussbaumer | if not vg_info: |
605 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't compute VG info for vg %s", self._vg_name) |
606 | 673cd9c4 | René Nussbaumer | free_size, _, _ = vg_info[0]
|
607 | a8083063 | Iustin Pop | if free_size < size:
|
608 | 89ff748d | Thomas Thrainer | base.ThrowError("Not enough free space: required %s,"
|
609 | 89ff748d | Thomas Thrainer | " available %s", size, free_size)
|
610 | a8083063 | Iustin Pop | |
611 | e398546b | Iustin Pop | _CheckResult(utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
612 | e398546b | Iustin Pop | "-n%s" % snap_name, self.dev_path])) |
613 | a8083063 | Iustin Pop | |
614 | 800ac399 | Iustin Pop | return (self._vg_name, snap_name) |
615 | a8083063 | Iustin Pop | |
616 | a1556cfa | Iustin Pop | def _RemoveOldInfo(self): |
617 | a1556cfa | Iustin Pop | """Try to remove old tags from the lv.
|
618 | a1556cfa | Iustin Pop |
|
619 | a1556cfa | Iustin Pop | """
|
620 | a1556cfa | Iustin Pop | result = utils.RunCmd(["lvs", "-o", "tags", "--noheadings", "--nosuffix", |
621 | a1556cfa | Iustin Pop | self.dev_path])
|
622 | a1556cfa | Iustin Pop | _CheckResult(result) |
623 | a1556cfa | Iustin Pop | |
624 | a1556cfa | Iustin Pop | raw_tags = result.stdout.strip() |
625 | a1556cfa | Iustin Pop | if raw_tags:
|
626 | a1556cfa | Iustin Pop | for tag in raw_tags.split(","): |
627 | a1556cfa | Iustin Pop | _CheckResult(utils.RunCmd(["lvchange", "--deltag", |
628 | a1556cfa | Iustin Pop | tag.strip(), self.dev_path]))
|
629 | a1556cfa | Iustin Pop | |
630 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
631 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
632 | a0c3fea1 | Michael Hanselmann |
|
633 | a0c3fea1 | Michael Hanselmann | """
|
634 | 89ff748d | Thomas Thrainer | base.BlockDev.SetInfo(self, text)
|
635 | a0c3fea1 | Michael Hanselmann | |
636 | a1556cfa | Iustin Pop | self._RemoveOldInfo()
|
637 | a1556cfa | Iustin Pop | |
638 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
639 | d0c8c01d | Iustin Pop | text = re.sub("^[^A-Za-z0-9_+.]", "_", text) |
640 | d0c8c01d | Iustin Pop | text = re.sub("[^-A-Za-z0-9_+.]", "_", text) |
641 | a0c3fea1 | Michael Hanselmann | |
642 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
643 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
644 | a0c3fea1 | Michael Hanselmann | |
645 | e398546b | Iustin Pop | _CheckResult(utils.RunCmd(["lvchange", "--addtag", text, self.dev_path])) |
646 | 82463074 | Iustin Pop | |
647 | c31ec06b | Bernardo Dal Seno | def _GetGrowthAvaliabilityExclStor(self): |
648 | c31ec06b | Bernardo Dal Seno | """Return how much the disk can grow with exclusive storage.
|
649 | c31ec06b | Bernardo Dal Seno |
|
650 | c31ec06b | Bernardo Dal Seno | @rtype: float
|
651 | c31ec06b | Bernardo Dal Seno | @return: available space in Mib
|
652 | c31ec06b | Bernardo Dal Seno |
|
653 | c31ec06b | Bernardo Dal Seno | """
|
654 | c31ec06b | Bernardo Dal Seno | pvs_info = self.GetPVInfo([self._vg_name]) |
655 | c31ec06b | Bernardo Dal Seno | if not pvs_info: |
656 | c31ec06b | Bernardo Dal Seno | base.ThrowError("Cannot get information about PVs for %s", self.dev_path) |
657 | c31ec06b | Bernardo Dal Seno | std_pv_size = self._GetStdPvSize(pvs_info)
|
658 | c31ec06b | Bernardo Dal Seno | free_space = sum(pvi.free - (pvi.size - std_pv_size)
|
659 | c31ec06b | Bernardo Dal Seno | for pvi in pvs_info |
660 | c31ec06b | Bernardo Dal Seno | if pvi.name in self.pv_names) |
661 | c31ec06b | Bernardo Dal Seno | return free_space
|
662 | c31ec06b | Bernardo Dal Seno | |
663 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
664 | 1005d816 | Iustin Pop | """Grow the logical volume.
|
665 | 1005d816 | Iustin Pop |
|
666 | 1005d816 | Iustin Pop | """
|
667 | cad0723b | Iustin Pop | if not backingstore: |
668 | cad0723b | Iustin Pop | return
|
669 | 38256320 | Iustin Pop | if self.pe_size is None or self.stripe_count is None: |
670 | 38256320 | Iustin Pop | if not self.Attach(): |
671 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't attach to LV during Grow()")
|
672 | 38256320 | Iustin Pop | full_stripe_size = self.pe_size * self.stripe_count |
673 | 5519f036 | Bernardo Dal Seno | # pe_size is in KB
|
674 | 5519f036 | Bernardo Dal Seno | amount *= 1024
|
675 | 38256320 | Iustin Pop | rest = amount % full_stripe_size |
676 | 38256320 | Iustin Pop | if rest != 0: |
677 | 38256320 | Iustin Pop | amount += full_stripe_size - rest |
678 | 5519f036 | Bernardo Dal Seno | cmd = ["lvextend", "-L", "+%dk" % amount] |
679 | 7fe23d47 | Iustin Pop | if dryrun:
|
680 | 7fe23d47 | Iustin Pop | cmd.append("--test")
|
681 | be9150ea | Bernardo Dal Seno | if excl_stor:
|
682 | c31ec06b | Bernardo Dal Seno | free_space = self._GetGrowthAvaliabilityExclStor()
|
683 | c31ec06b | Bernardo Dal Seno | # amount is in KiB, free_space in MiB
|
684 | c31ec06b | Bernardo Dal Seno | if amount > free_space * 1024: |
685 | c31ec06b | Bernardo Dal Seno | base.ThrowError("Not enough free space to grow %s: %d MiB required,"
|
686 | c31ec06b | Bernardo Dal Seno | " %d available", self.dev_path, amount / 1024, |
687 | c31ec06b | Bernardo Dal Seno | free_space) |
688 | be9150ea | Bernardo Dal Seno | # Disk growth doesn't grow the number of spindles, so we must stay within
|
689 | be9150ea | Bernardo Dal Seno | # our assigned volumes
|
690 | be9150ea | Bernardo Dal Seno | pvlist = list(self.pv_names) |
691 | be9150ea | Bernardo Dal Seno | else:
|
692 | be9150ea | Bernardo Dal Seno | pvlist = [] |
693 | 1005d816 | Iustin Pop | # we try multiple algorithms since the 'best' ones might not have
|
694 | 1005d816 | Iustin Pop | # space available in the right place, but later ones might (since
|
695 | 1005d816 | Iustin Pop | # they have less constraints); also note that only recent LVM
|
696 | 1005d816 | Iustin Pop | # supports 'cling'
|
697 | 1005d816 | Iustin Pop | for alloc_policy in "contiguous", "cling", "normal": |
698 | be9150ea | Bernardo Dal Seno | result = utils.RunCmd(cmd + ["--alloc", alloc_policy, self.dev_path] + |
699 | be9150ea | Bernardo Dal Seno | pvlist) |
700 | 1005d816 | Iustin Pop | if not result.failed: |
701 | 1005d816 | Iustin Pop | return
|
702 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't grow LV %s: %s", self.dev_path, result.output) |
703 | a8083063 | Iustin Pop | |
704 | baa7f1d6 | Bernardo Dal Seno | def GetActualSpindles(self): |
705 | baa7f1d6 | Bernardo Dal Seno | """Return the number of spindles used.
|
706 | baa7f1d6 | Bernardo Dal Seno |
|
707 | baa7f1d6 | Bernardo Dal Seno | """
|
708 | baa7f1d6 | Bernardo Dal Seno | assert self.attached, "BlockDevice not attached in GetActualSpindles()" |
709 | baa7f1d6 | Bernardo Dal Seno | return len(self.pv_names) |
710 | baa7f1d6 | Bernardo Dal Seno | |
711 | a2cfdea2 | Iustin Pop | |
712 | 89ff748d | Thomas Thrainer | class FileStorage(base.BlockDev): |
713 | 6f695a2e | Manuel Franceschini | """File device.
|
714 | abdf0113 | Iustin Pop |
|
715 | 6f695a2e | Manuel Franceschini | This class represents the a file storage backend device.
|
716 | 6f695a2e | Manuel Franceschini |
|
717 | 6f695a2e | Manuel Franceschini | The unique_id for the file device is a (file_driver, file_path) tuple.
|
718 | abdf0113 | Iustin Pop |
|
719 | 6f695a2e | Manuel Franceschini | """
|
720 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
721 | 6f695a2e | Manuel Franceschini | """Initalizes a file device backend.
|
722 | 6f695a2e | Manuel Franceschini |
|
723 | 6f695a2e | Manuel Franceschini | """
|
724 | 6f695a2e | Manuel Franceschini | if children:
|
725 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("Invalid setup for file device") |
726 | 94dcbdb0 | Andrea Spadaccini | super(FileStorage, self).__init__(unique_id, children, size, params) |
727 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
728 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
729 | 6f695a2e | Manuel Franceschini | self.driver = unique_id[0] |
730 | 6f695a2e | Manuel Franceschini | self.dev_path = unique_id[1] |
731 | 5e09a309 | Michael Hanselmann | |
732 | 13a6c760 | Helga Velroyen | filestorage.CheckFileStoragePathAcceptance(self.dev_path)
|
733 | 5e09a309 | Michael Hanselmann | |
734 | ecb091e3 | Iustin Pop | self.Attach()
|
735 | 6f695a2e | Manuel Franceschini | |
736 | 6f695a2e | Manuel Franceschini | def Assemble(self): |
737 | 6f695a2e | Manuel Franceschini | """Assemble the device.
|
738 | 6f695a2e | Manuel Franceschini |
|
739 | 6f695a2e | Manuel Franceschini | Checks whether the file device exists, raises BlockDeviceError otherwise.
|
740 | 6f695a2e | Manuel Franceschini |
|
741 | 6f695a2e | Manuel Franceschini | """
|
742 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
743 | 89ff748d | Thomas Thrainer | base.ThrowError("File device '%s' does not exist" % self.dev_path) |
744 | 6f695a2e | Manuel Franceschini | |
745 | 6f695a2e | Manuel Franceschini | def Shutdown(self): |
746 | 6f695a2e | Manuel Franceschini | """Shutdown the device.
|
747 | 6f695a2e | Manuel Franceschini |
|
748 | 5bbd3f7f | Michael Hanselmann | This is a no-op for the file type, as we don't deactivate
|
749 | 6f695a2e | Manuel Franceschini | the file on shutdown.
|
750 | 6f695a2e | Manuel Franceschini |
|
751 | 6f695a2e | Manuel Franceschini | """
|
752 | 746f7476 | Iustin Pop | pass
|
753 | 6f695a2e | Manuel Franceschini | |
754 | 6f695a2e | Manuel Franceschini | def Open(self, force=False): |
755 | 6f695a2e | Manuel Franceschini | """Make the device ready for I/O.
|
756 | 6f695a2e | Manuel Franceschini |
|
757 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
758 | 6f695a2e | Manuel Franceschini |
|
759 | 6f695a2e | Manuel Franceschini | """
|
760 | 6f695a2e | Manuel Franceschini | pass
|
761 | 6f695a2e | Manuel Franceschini | |
762 | 6f695a2e | Manuel Franceschini | def Close(self): |
763 | 6f695a2e | Manuel Franceschini | """Notifies that the device will no longer be used for I/O.
|
764 | 6f695a2e | Manuel Franceschini |
|
765 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
766 | 6f695a2e | Manuel Franceschini |
|
767 | 6f695a2e | Manuel Franceschini | """
|
768 | 6f695a2e | Manuel Franceschini | pass
|
769 | 6f695a2e | Manuel Franceschini | |
770 | 6f695a2e | Manuel Franceschini | def Remove(self): |
771 | 6f695a2e | Manuel Franceschini | """Remove the file backing the block device.
|
772 | 6f695a2e | Manuel Franceschini |
|
773 | c41eea6e | Iustin Pop | @rtype: boolean
|
774 | c41eea6e | Iustin Pop | @return: True if the removal was successful
|
775 | 6f695a2e | Manuel Franceschini |
|
776 | 6f695a2e | Manuel Franceschini | """
|
777 | 6f695a2e | Manuel Franceschini | try:
|
778 | 6f695a2e | Manuel Franceschini | os.remove(self.dev_path)
|
779 | 6f695a2e | Manuel Franceschini | except OSError, err: |
780 | 0c6c04ec | Iustin Pop | if err.errno != errno.ENOENT:
|
781 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't remove file '%s': %s", self.dev_path, err) |
782 | 6f695a2e | Manuel Franceschini | |
783 | bbe4cc16 | Iustin Pop | def Rename(self, new_id): |
784 | bbe4cc16 | Iustin Pop | """Renames the file.
|
785 | bbe4cc16 | Iustin Pop |
|
786 | bbe4cc16 | Iustin Pop | """
|
787 | bbe4cc16 | Iustin Pop | # TODO: implement rename for file-based storage
|
788 | 89ff748d | Thomas Thrainer | base.ThrowError("Rename is not supported for file-based storage")
|
789 | bbe4cc16 | Iustin Pop | |
790 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
791 | bbe4cc16 | Iustin Pop | """Grow the file
|
792 | bbe4cc16 | Iustin Pop |
|
793 | bbe4cc16 | Iustin Pop | @param amount: the amount (in mebibytes) to grow with
|
794 | bbe4cc16 | Iustin Pop |
|
795 | bbe4cc16 | Iustin Pop | """
|
796 | cad0723b | Iustin Pop | if not backingstore: |
797 | cad0723b | Iustin Pop | return
|
798 | 91e2d9ec | Guido Trotter | # Check that the file exists
|
799 | 91e2d9ec | Guido Trotter | self.Assemble()
|
800 | 91e2d9ec | Guido Trotter | current_size = self.GetActualSize()
|
801 | 91e2d9ec | Guido Trotter | new_size = current_size + amount * 1024 * 1024 |
802 | 91e2d9ec | Guido Trotter | assert new_size > current_size, "Cannot Grow with a negative amount" |
803 | 7fe23d47 | Iustin Pop | # We can't really simulate the growth
|
804 | 7fe23d47 | Iustin Pop | if dryrun:
|
805 | 7fe23d47 | Iustin Pop | return
|
806 | 91e2d9ec | Guido Trotter | try:
|
807 | 91e2d9ec | Guido Trotter | f = open(self.dev_path, "a+") |
808 | 91e2d9ec | Guido Trotter | f.truncate(new_size) |
809 | 91e2d9ec | Guido Trotter | f.close() |
810 | 91e2d9ec | Guido Trotter | except EnvironmentError, err: |
811 | 89ff748d | Thomas Thrainer | base.ThrowError("Error in file growth: %", str(err)) |
812 | bbe4cc16 | Iustin Pop | |
813 | 6f695a2e | Manuel Franceschini | def Attach(self): |
814 | 6f695a2e | Manuel Franceschini | """Attach to an existing file.
|
815 | 6f695a2e | Manuel Franceschini |
|
816 | 6f695a2e | Manuel Franceschini | Check if this file already exists.
|
817 | 6f695a2e | Manuel Franceschini |
|
818 | c41eea6e | Iustin Pop | @rtype: boolean
|
819 | c41eea6e | Iustin Pop | @return: True if file exists
|
820 | 6f695a2e | Manuel Franceschini |
|
821 | 6f695a2e | Manuel Franceschini | """
|
822 | ecb091e3 | Iustin Pop | self.attached = os.path.exists(self.dev_path) |
823 | ecb091e3 | Iustin Pop | return self.attached |
824 | 6f695a2e | Manuel Franceschini | |
825 | fcff3897 | Iustin Pop | def GetActualSize(self): |
826 | fcff3897 | Iustin Pop | """Return the actual disk size.
|
827 | fcff3897 | Iustin Pop |
|
828 | fcff3897 | Iustin Pop | @note: the device needs to be active when this is called
|
829 | fcff3897 | Iustin Pop |
|
830 | fcff3897 | Iustin Pop | """
|
831 | fcff3897 | Iustin Pop | assert self.attached, "BlockDevice not attached in GetActualSize()" |
832 | fcff3897 | Iustin Pop | try:
|
833 | fcff3897 | Iustin Pop | st = os.stat(self.dev_path)
|
834 | fcff3897 | Iustin Pop | return st.st_size
|
835 | fcff3897 | Iustin Pop | except OSError, err: |
836 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't stat %s: %s", self.dev_path, err) |
837 | fcff3897 | Iustin Pop | |
838 | 6f695a2e | Manuel Franceschini | @classmethod
|
839 | 24c06acb | Bernardo Dal Seno | def Create(cls, unique_id, children, size, spindles, params, excl_stor): |
840 | 6f695a2e | Manuel Franceschini | """Create a new file.
|
841 | 6f695a2e | Manuel Franceschini |
|
842 | c41eea6e | Iustin Pop | @param size: the size of file in MiB
|
843 | 6f695a2e | Manuel Franceschini |
|
844 | c41eea6e | Iustin Pop | @rtype: L{bdev.FileStorage}
|
845 | c41eea6e | Iustin Pop | @return: an instance of FileStorage
|
846 | 6f695a2e | Manuel Franceschini |
|
847 | 6f695a2e | Manuel Franceschini | """
|
848 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
849 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("FileStorage device requested with" |
850 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
851 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
852 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
853 | 5e09a309 | Michael Hanselmann | |
854 | 6f695a2e | Manuel Franceschini | dev_path = unique_id[1]
|
855 | 5e09a309 | Michael Hanselmann | |
856 | 13a6c760 | Helga Velroyen | filestorage.CheckFileStoragePathAcceptance(dev_path) |
857 | 5e09a309 | Michael Hanselmann | |
858 | 6f695a2e | Manuel Franceschini | try:
|
859 | cdeefd9b | Guido Trotter | fd = os.open(dev_path, os.O_RDWR | os.O_CREAT | os.O_EXCL) |
860 | cdeefd9b | Guido Trotter | f = os.fdopen(fd, "w")
|
861 | 6f695a2e | Manuel Franceschini | f.truncate(size * 1024 * 1024) |
862 | 6f695a2e | Manuel Franceschini | f.close() |
863 | cdeefd9b | Guido Trotter | except EnvironmentError, err: |
864 | cdeefd9b | Guido Trotter | if err.errno == errno.EEXIST:
|
865 | 89ff748d | Thomas Thrainer | base.ThrowError("File already existing: %s", dev_path)
|
866 | 89ff748d | Thomas Thrainer | base.ThrowError("Error in file creation: %", str(err)) |
867 | 6f695a2e | Manuel Franceschini | |
868 | 94dcbdb0 | Andrea Spadaccini | return FileStorage(unique_id, children, size, params)
|
869 | 6f695a2e | Manuel Franceschini | |
870 | 6f695a2e | Manuel Franceschini | |
871 | 89ff748d | Thomas Thrainer | class PersistentBlockDevice(base.BlockDev): |
872 | b6135bbc | Apollon Oikonomopoulos | """A block device with persistent node
|
873 | b6135bbc | Apollon Oikonomopoulos |
|
874 | b6135bbc | Apollon Oikonomopoulos | May be either directly attached, or exposed through DM (e.g. dm-multipath).
|
875 | b6135bbc | Apollon Oikonomopoulos | udev helpers are probably required to give persistent, human-friendly
|
876 | b6135bbc | Apollon Oikonomopoulos | names.
|
877 | b6135bbc | Apollon Oikonomopoulos |
|
878 | b6135bbc | Apollon Oikonomopoulos | For the time being, pathnames are required to lie under /dev.
|
879 | b6135bbc | Apollon Oikonomopoulos |
|
880 | b6135bbc | Apollon Oikonomopoulos | """
|
881 | 94dcbdb0 | Andrea Spadaccini | def __init__(self, unique_id, children, size, params): |
882 | b6135bbc | Apollon Oikonomopoulos | """Attaches to a static block device.
|
883 | b6135bbc | Apollon Oikonomopoulos |
|
884 | b6135bbc | Apollon Oikonomopoulos | The unique_id is a path under /dev.
|
885 | b6135bbc | Apollon Oikonomopoulos |
|
886 | b6135bbc | Apollon Oikonomopoulos | """
|
887 | 94dcbdb0 | Andrea Spadaccini | super(PersistentBlockDevice, self).__init__(unique_id, children, size, |
888 | 94dcbdb0 | Andrea Spadaccini | params) |
889 | b6135bbc | Apollon Oikonomopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
890 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
891 | b6135bbc | Apollon Oikonomopoulos | self.dev_path = unique_id[1] |
892 | d0c8c01d | Iustin Pop | if not os.path.realpath(self.dev_path).startswith("/dev/"): |
893 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Full path '%s' lies outside /dev" % |
894 | b6135bbc | Apollon Oikonomopoulos | os.path.realpath(self.dev_path))
|
895 | b6135bbc | Apollon Oikonomopoulos | # TODO: this is just a safety guard checking that we only deal with devices
|
896 | b6135bbc | Apollon Oikonomopoulos | # we know how to handle. In the future this will be integrated with
|
897 | b6135bbc | Apollon Oikonomopoulos | # external storage backends and possible values will probably be collected
|
898 | b6135bbc | Apollon Oikonomopoulos | # from the cluster configuration.
|
899 | b6135bbc | Apollon Oikonomopoulos | if unique_id[0] != constants.BLOCKDEV_DRIVER_MANUAL: |
900 | b6135bbc | Apollon Oikonomopoulos | raise ValueError("Got persistent block device of invalid type: %s" % |
901 | b6135bbc | Apollon Oikonomopoulos | unique_id[0])
|
902 | b6135bbc | Apollon Oikonomopoulos | |
903 | b6135bbc | Apollon Oikonomopoulos | self.major = self.minor = None |
904 | b6135bbc | Apollon Oikonomopoulos | self.Attach()
|
905 | b6135bbc | Apollon Oikonomopoulos | |
906 | b6135bbc | Apollon Oikonomopoulos | @classmethod
|
907 | 24c06acb | Bernardo Dal Seno | def Create(cls, unique_id, children, size, spindles, params, excl_stor): |
908 | b6135bbc | Apollon Oikonomopoulos | """Create a new device
|
909 | b6135bbc | Apollon Oikonomopoulos |
|
910 | b6135bbc | Apollon Oikonomopoulos | This is a noop, we only return a PersistentBlockDevice instance
|
911 | b6135bbc | Apollon Oikonomopoulos |
|
912 | b6135bbc | Apollon Oikonomopoulos | """
|
913 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
914 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("Persistent block device requested with" |
915 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
916 | 94dcbdb0 | Andrea Spadaccini | return PersistentBlockDevice(unique_id, children, 0, params) |
917 | b6135bbc | Apollon Oikonomopoulos | |
918 | b6135bbc | Apollon Oikonomopoulos | def Remove(self): |
919 | b6135bbc | Apollon Oikonomopoulos | """Remove a device
|
920 | b6135bbc | Apollon Oikonomopoulos |
|
921 | b6135bbc | Apollon Oikonomopoulos | This is a noop
|
922 | b6135bbc | Apollon Oikonomopoulos |
|
923 | b6135bbc | Apollon Oikonomopoulos | """
|
924 | b6135bbc | Apollon Oikonomopoulos | pass
|
925 | b6135bbc | Apollon Oikonomopoulos | |
926 | b6135bbc | Apollon Oikonomopoulos | def Rename(self, new_id): |
927 | b6135bbc | Apollon Oikonomopoulos | """Rename this device.
|
928 | b6135bbc | Apollon Oikonomopoulos |
|
929 | b6135bbc | Apollon Oikonomopoulos | """
|
930 | 89ff748d | Thomas Thrainer | base.ThrowError("Rename is not supported for PersistentBlockDev storage")
|
931 | b6135bbc | Apollon Oikonomopoulos | |
932 | b6135bbc | Apollon Oikonomopoulos | def Attach(self): |
933 | b6135bbc | Apollon Oikonomopoulos | """Attach to an existing block device.
|
934 | b6135bbc | Apollon Oikonomopoulos |
|
935 | b6135bbc | Apollon Oikonomopoulos |
|
936 | b6135bbc | Apollon Oikonomopoulos | """
|
937 | b6135bbc | Apollon Oikonomopoulos | self.attached = False |
938 | b6135bbc | Apollon Oikonomopoulos | try:
|
939 | b6135bbc | Apollon Oikonomopoulos | st = os.stat(self.dev_path)
|
940 | b6135bbc | Apollon Oikonomopoulos | except OSError, err: |
941 | b6135bbc | Apollon Oikonomopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
942 | b6135bbc | Apollon Oikonomopoulos | return False |
943 | b6135bbc | Apollon Oikonomopoulos | |
944 | b6135bbc | Apollon Oikonomopoulos | if not stat.S_ISBLK(st.st_mode): |
945 | b6135bbc | Apollon Oikonomopoulos | logging.error("%s is not a block device", self.dev_path) |
946 | b6135bbc | Apollon Oikonomopoulos | return False |
947 | b6135bbc | Apollon Oikonomopoulos | |
948 | b6135bbc | Apollon Oikonomopoulos | self.major = os.major(st.st_rdev)
|
949 | b6135bbc | Apollon Oikonomopoulos | self.minor = os.minor(st.st_rdev)
|
950 | b6135bbc | Apollon Oikonomopoulos | self.attached = True |
951 | b6135bbc | Apollon Oikonomopoulos | |
952 | b6135bbc | Apollon Oikonomopoulos | return True |
953 | b6135bbc | Apollon Oikonomopoulos | |
954 | b6135bbc | Apollon Oikonomopoulos | def Assemble(self): |
955 | b6135bbc | Apollon Oikonomopoulos | """Assemble the device.
|
956 | b6135bbc | Apollon Oikonomopoulos |
|
957 | b6135bbc | Apollon Oikonomopoulos | """
|
958 | b6135bbc | Apollon Oikonomopoulos | pass
|
959 | b6135bbc | Apollon Oikonomopoulos | |
960 | b6135bbc | Apollon Oikonomopoulos | def Shutdown(self): |
961 | b6135bbc | Apollon Oikonomopoulos | """Shutdown the device.
|
962 | b6135bbc | Apollon Oikonomopoulos |
|
963 | b6135bbc | Apollon Oikonomopoulos | """
|
964 | b6135bbc | Apollon Oikonomopoulos | pass
|
965 | b6135bbc | Apollon Oikonomopoulos | |
966 | b6135bbc | Apollon Oikonomopoulos | def Open(self, force=False): |
967 | b6135bbc | Apollon Oikonomopoulos | """Make the device ready for I/O.
|
968 | b6135bbc | Apollon Oikonomopoulos |
|
969 | b6135bbc | Apollon Oikonomopoulos | """
|
970 | b6135bbc | Apollon Oikonomopoulos | pass
|
971 | b6135bbc | Apollon Oikonomopoulos | |
972 | b6135bbc | Apollon Oikonomopoulos | def Close(self): |
973 | b6135bbc | Apollon Oikonomopoulos | """Notifies that the device will no longer be used for I/O.
|
974 | b6135bbc | Apollon Oikonomopoulos |
|
975 | b6135bbc | Apollon Oikonomopoulos | """
|
976 | b6135bbc | Apollon Oikonomopoulos | pass
|
977 | b6135bbc | Apollon Oikonomopoulos | |
978 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
979 | b6135bbc | Apollon Oikonomopoulos | """Grow the logical volume.
|
980 | b6135bbc | Apollon Oikonomopoulos |
|
981 | b6135bbc | Apollon Oikonomopoulos | """
|
982 | 89ff748d | Thomas Thrainer | base.ThrowError("Grow is not supported for PersistentBlockDev storage")
|
983 | b6135bbc | Apollon Oikonomopoulos | |
984 | b6135bbc | Apollon Oikonomopoulos | |
985 | 89ff748d | Thomas Thrainer | class RADOSBlockDevice(base.BlockDev): |
986 | 7181fba0 | Constantinos Venetsanopoulos | """A RADOS Block Device (rbd).
|
987 | 7181fba0 | Constantinos Venetsanopoulos |
|
988 | 7181fba0 | Constantinos Venetsanopoulos | This class implements the RADOS Block Device for the backend. You need
|
989 | 7181fba0 | Constantinos Venetsanopoulos | the rbd kernel driver, the RADOS Tools and a working RADOS cluster for
|
990 | 7181fba0 | Constantinos Venetsanopoulos | this to be functional.
|
991 | 7181fba0 | Constantinos Venetsanopoulos |
|
992 | 7181fba0 | Constantinos Venetsanopoulos | """
|
993 | 7181fba0 | Constantinos Venetsanopoulos | def __init__(self, unique_id, children, size, params): |
994 | 7181fba0 | Constantinos Venetsanopoulos | """Attaches to an rbd device.
|
995 | 7181fba0 | Constantinos Venetsanopoulos |
|
996 | 7181fba0 | Constantinos Venetsanopoulos | """
|
997 | 7181fba0 | Constantinos Venetsanopoulos | super(RADOSBlockDevice, self).__init__(unique_id, children, size, params) |
998 | 7181fba0 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
999 | 7181fba0 | Constantinos Venetsanopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1000 | 7181fba0 | Constantinos Venetsanopoulos | |
1001 | 7181fba0 | Constantinos Venetsanopoulos | self.driver, self.rbd_name = unique_id |
1002 | 7181fba0 | Constantinos Venetsanopoulos | |
1003 | 7181fba0 | Constantinos Venetsanopoulos | self.major = self.minor = None |
1004 | 7181fba0 | Constantinos Venetsanopoulos | self.Attach()
|
1005 | 7181fba0 | Constantinos Venetsanopoulos | |
1006 | 7181fba0 | Constantinos Venetsanopoulos | @classmethod
|
1007 | 24c06acb | Bernardo Dal Seno | def Create(cls, unique_id, children, size, spindles, params, excl_stor): |
1008 | 7181fba0 | Constantinos Venetsanopoulos | """Create a new rbd device.
|
1009 | 7181fba0 | Constantinos Venetsanopoulos |
|
1010 | 7181fba0 | Constantinos Venetsanopoulos | Provision a new rbd volume inside a RADOS pool.
|
1011 | 7181fba0 | Constantinos Venetsanopoulos |
|
1012 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1013 | 7181fba0 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1014 | 7181fba0 | Constantinos Venetsanopoulos | raise errors.ProgrammerError("Invalid configuration data %s" % |
1015 | 7181fba0 | Constantinos Venetsanopoulos | str(unique_id))
|
1016 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
1017 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("RBD device requested with" |
1018 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
1019 | 7181fba0 | Constantinos Venetsanopoulos | rbd_pool = params[constants.LDP_POOL] |
1020 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name = unique_id[1]
|
1021 | 7181fba0 | Constantinos Venetsanopoulos | |
1022 | 7181fba0 | Constantinos Venetsanopoulos | # Provision a new rbd volume (Image) inside the RADOS cluster.
|
1023 | 7181fba0 | Constantinos Venetsanopoulos | cmd = [constants.RBD_CMD, "create", "-p", rbd_pool, |
1024 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name, "--size", "%s" % size] |
1025 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(cmd) |
1026 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1027 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd creation failed (%s): %s",
|
1028 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1029 | 7181fba0 | Constantinos Venetsanopoulos | |
1030 | 7181fba0 | Constantinos Venetsanopoulos | return RADOSBlockDevice(unique_id, children, size, params)
|
1031 | 7181fba0 | Constantinos Venetsanopoulos | |
1032 | 7181fba0 | Constantinos Venetsanopoulos | def Remove(self): |
1033 | 7181fba0 | Constantinos Venetsanopoulos | """Remove the rbd device.
|
1034 | 7181fba0 | Constantinos Venetsanopoulos |
|
1035 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1036 | 7181fba0 | Constantinos Venetsanopoulos | rbd_pool = self.params[constants.LDP_POOL]
|
1037 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name = self.unique_id[1] |
1038 | 7181fba0 | Constantinos Venetsanopoulos | |
1039 | 7181fba0 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1040 | 7181fba0 | Constantinos Venetsanopoulos | # The rbd device doesn't exist.
|
1041 | 7181fba0 | Constantinos Venetsanopoulos | return
|
1042 | 7181fba0 | Constantinos Venetsanopoulos | |
1043 | 7181fba0 | Constantinos Venetsanopoulos | # First shutdown the device (remove mappings).
|
1044 | 7181fba0 | Constantinos Venetsanopoulos | self.Shutdown()
|
1045 | 7181fba0 | Constantinos Venetsanopoulos | |
1046 | 7181fba0 | Constantinos Venetsanopoulos | # Remove the actual Volume (Image) from the RADOS cluster.
|
1047 | 7181fba0 | Constantinos Venetsanopoulos | cmd = [constants.RBD_CMD, "rm", "-p", rbd_pool, rbd_name] |
1048 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(cmd) |
1049 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1050 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't remove Volume from cluster with rbd rm: %s - %s",
|
1051 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1052 | 7181fba0 | Constantinos Venetsanopoulos | |
1053 | 7181fba0 | Constantinos Venetsanopoulos | def Rename(self, new_id): |
1054 | 7181fba0 | Constantinos Venetsanopoulos | """Rename this device.
|
1055 | 7181fba0 | Constantinos Venetsanopoulos |
|
1056 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1057 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1058 | 7181fba0 | Constantinos Venetsanopoulos | |
1059 | 7181fba0 | Constantinos Venetsanopoulos | def Attach(self): |
1060 | 7181fba0 | Constantinos Venetsanopoulos | """Attach to an existing rbd device.
|
1061 | 7181fba0 | Constantinos Venetsanopoulos |
|
1062 | 7181fba0 | Constantinos Venetsanopoulos | This method maps the rbd volume that matches our name with
|
1063 | 7181fba0 | Constantinos Venetsanopoulos | an rbd device and then attaches to this device.
|
1064 | 7181fba0 | Constantinos Venetsanopoulos |
|
1065 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1066 | 7181fba0 | Constantinos Venetsanopoulos | self.attached = False |
1067 | 7181fba0 | Constantinos Venetsanopoulos | |
1068 | 7181fba0 | Constantinos Venetsanopoulos | # Map the rbd volume to a block device under /dev
|
1069 | 7181fba0 | Constantinos Venetsanopoulos | self.dev_path = self._MapVolumeToBlockdev(self.unique_id) |
1070 | 7181fba0 | Constantinos Venetsanopoulos | |
1071 | 7181fba0 | Constantinos Venetsanopoulos | try:
|
1072 | 7181fba0 | Constantinos Venetsanopoulos | st = os.stat(self.dev_path)
|
1073 | 7181fba0 | Constantinos Venetsanopoulos | except OSError, err: |
1074 | 7181fba0 | Constantinos Venetsanopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
1075 | 7181fba0 | Constantinos Venetsanopoulos | return False |
1076 | 7181fba0 | Constantinos Venetsanopoulos | |
1077 | 7181fba0 | Constantinos Venetsanopoulos | if not stat.S_ISBLK(st.st_mode): |
1078 | 7181fba0 | Constantinos Venetsanopoulos | logging.error("%s is not a block device", self.dev_path) |
1079 | 7181fba0 | Constantinos Venetsanopoulos | return False |
1080 | 7181fba0 | Constantinos Venetsanopoulos | |
1081 | 7181fba0 | Constantinos Venetsanopoulos | self.major = os.major(st.st_rdev)
|
1082 | 7181fba0 | Constantinos Venetsanopoulos | self.minor = os.minor(st.st_rdev)
|
1083 | 7181fba0 | Constantinos Venetsanopoulos | self.attached = True |
1084 | 7181fba0 | Constantinos Venetsanopoulos | |
1085 | 7181fba0 | Constantinos Venetsanopoulos | return True |
1086 | 7181fba0 | Constantinos Venetsanopoulos | |
1087 | 7181fba0 | Constantinos Venetsanopoulos | def _MapVolumeToBlockdev(self, unique_id): |
1088 | 7181fba0 | Constantinos Venetsanopoulos | """Maps existing rbd volumes to block devices.
|
1089 | 7181fba0 | Constantinos Venetsanopoulos |
|
1090 | 7181fba0 | Constantinos Venetsanopoulos | This method should be idempotent if the mapping already exists.
|
1091 | 7181fba0 | Constantinos Venetsanopoulos |
|
1092 | 7181fba0 | Constantinos Venetsanopoulos | @rtype: string
|
1093 | 7181fba0 | Constantinos Venetsanopoulos | @return: the block device path that corresponds to the volume
|
1094 | 7181fba0 | Constantinos Venetsanopoulos |
|
1095 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1096 | 7181fba0 | Constantinos Venetsanopoulos | pool = self.params[constants.LDP_POOL]
|
1097 | 7181fba0 | Constantinos Venetsanopoulos | name = unique_id[1]
|
1098 | 7181fba0 | Constantinos Venetsanopoulos | |
1099 | 7181fba0 | Constantinos Venetsanopoulos | # Check if the mapping already exists.
|
1100 | bdecfea2 | Stratos Psomadakis | rbd_dev = self._VolumeToBlockdev(pool, name)
|
1101 | 7181fba0 | Constantinos Venetsanopoulos | if rbd_dev:
|
1102 | 7181fba0 | Constantinos Venetsanopoulos | # The mapping exists. Return it.
|
1103 | 7181fba0 | Constantinos Venetsanopoulos | return rbd_dev
|
1104 | 7181fba0 | Constantinos Venetsanopoulos | |
1105 | 7181fba0 | Constantinos Venetsanopoulos | # The mapping doesn't exist. Create it.
|
1106 | 7181fba0 | Constantinos Venetsanopoulos | map_cmd = [constants.RBD_CMD, "map", "-p", pool, name] |
1107 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(map_cmd) |
1108 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1109 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd map failed (%s): %s",
|
1110 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1111 | 7181fba0 | Constantinos Venetsanopoulos | |
1112 | 7181fba0 | Constantinos Venetsanopoulos | # Find the corresponding rbd device.
|
1113 | bdecfea2 | Stratos Psomadakis | rbd_dev = self._VolumeToBlockdev(pool, name)
|
1114 | 7181fba0 | Constantinos Venetsanopoulos | if not rbd_dev: |
1115 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd map succeeded, but could not find the rbd block"
|
1116 | 89ff748d | Thomas Thrainer | " device in output of showmapped, for volume: %s", name)
|
1117 | 7181fba0 | Constantinos Venetsanopoulos | |
1118 | 7181fba0 | Constantinos Venetsanopoulos | # The device was successfully mapped. Return it.
|
1119 | 7181fba0 | Constantinos Venetsanopoulos | return rbd_dev
|
1120 | 7181fba0 | Constantinos Venetsanopoulos | |
1121 | bdecfea2 | Stratos Psomadakis | @classmethod
|
1122 | bdecfea2 | Stratos Psomadakis | def _VolumeToBlockdev(cls, pool, volume_name): |
1123 | bdecfea2 | Stratos Psomadakis | """Do the 'volume name'-to-'rbd block device' resolving.
|
1124 | bdecfea2 | Stratos Psomadakis |
|
1125 | bdecfea2 | Stratos Psomadakis | @type pool: string
|
1126 | bdecfea2 | Stratos Psomadakis | @param pool: RADOS pool to use
|
1127 | bdecfea2 | Stratos Psomadakis | @type volume_name: string
|
1128 | bdecfea2 | Stratos Psomadakis | @param volume_name: the name of the volume whose device we search for
|
1129 | bdecfea2 | Stratos Psomadakis | @rtype: string or None
|
1130 | bdecfea2 | Stratos Psomadakis | @return: block device path if the volume is mapped, else None
|
1131 | bdecfea2 | Stratos Psomadakis |
|
1132 | bdecfea2 | Stratos Psomadakis | """
|
1133 | bdecfea2 | Stratos Psomadakis | try:
|
1134 | bdecfea2 | Stratos Psomadakis | # Newer versions of the rbd tool support json output formatting. Use it
|
1135 | bdecfea2 | Stratos Psomadakis | # if available.
|
1136 | bdecfea2 | Stratos Psomadakis | showmap_cmd = [ |
1137 | bdecfea2 | Stratos Psomadakis | constants.RBD_CMD, |
1138 | bdecfea2 | Stratos Psomadakis | "showmapped",
|
1139 | bdecfea2 | Stratos Psomadakis | "-p",
|
1140 | bdecfea2 | Stratos Psomadakis | pool, |
1141 | bdecfea2 | Stratos Psomadakis | "--format",
|
1142 | bdecfea2 | Stratos Psomadakis | "json"
|
1143 | bdecfea2 | Stratos Psomadakis | ] |
1144 | bdecfea2 | Stratos Psomadakis | result = utils.RunCmd(showmap_cmd) |
1145 | bdecfea2 | Stratos Psomadakis | if result.failed:
|
1146 | bdecfea2 | Stratos Psomadakis | logging.error("rbd JSON output formatting returned error (%s): %s,"
|
1147 | bdecfea2 | Stratos Psomadakis | "falling back to plain output parsing",
|
1148 | bdecfea2 | Stratos Psomadakis | result.fail_reason, result.output) |
1149 | bdecfea2 | Stratos Psomadakis | raise RbdShowmappedJsonError
|
1150 | bdecfea2 | Stratos Psomadakis | |
1151 | bdecfea2 | Stratos Psomadakis | return cls._ParseRbdShowmappedJson(result.output, volume_name)
|
1152 | bdecfea2 | Stratos Psomadakis | except RbdShowmappedJsonError:
|
1153 | bdecfea2 | Stratos Psomadakis | # For older versions of rbd, we have to parse the plain / text output
|
1154 | bdecfea2 | Stratos Psomadakis | # manually.
|
1155 | bdecfea2 | Stratos Psomadakis | showmap_cmd = [constants.RBD_CMD, "showmapped", "-p", pool] |
1156 | bdecfea2 | Stratos Psomadakis | result = utils.RunCmd(showmap_cmd) |
1157 | bdecfea2 | Stratos Psomadakis | if result.failed:
|
1158 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd showmapped failed (%s): %s",
|
1159 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1160 | bdecfea2 | Stratos Psomadakis | |
1161 | bdecfea2 | Stratos Psomadakis | return cls._ParseRbdShowmappedPlain(result.output, volume_name)
|
1162 | bdecfea2 | Stratos Psomadakis | |
1163 | bdecfea2 | Stratos Psomadakis | @staticmethod
|
1164 | bdecfea2 | Stratos Psomadakis | def _ParseRbdShowmappedJson(output, volume_name): |
1165 | bdecfea2 | Stratos Psomadakis | """Parse the json output of `rbd showmapped'.
|
1166 | bdecfea2 | Stratos Psomadakis |
|
1167 | bdecfea2 | Stratos Psomadakis | This method parses the json output of `rbd showmapped' and returns the rbd
|
1168 | bdecfea2 | Stratos Psomadakis | block device path (e.g. /dev/rbd0) that matches the given rbd volume.
|
1169 | bdecfea2 | Stratos Psomadakis |
|
1170 | bdecfea2 | Stratos Psomadakis | @type output: string
|
1171 | bdecfea2 | Stratos Psomadakis | @param output: the json output of `rbd showmapped'
|
1172 | bdecfea2 | Stratos Psomadakis | @type volume_name: string
|
1173 | bdecfea2 | Stratos Psomadakis | @param volume_name: the name of the volume whose device we search for
|
1174 | bdecfea2 | Stratos Psomadakis | @rtype: string or None
|
1175 | bdecfea2 | Stratos Psomadakis | @return: block device path if the volume is mapped, else None
|
1176 | bdecfea2 | Stratos Psomadakis |
|
1177 | bdecfea2 | Stratos Psomadakis | """
|
1178 | bdecfea2 | Stratos Psomadakis | try:
|
1179 | bdecfea2 | Stratos Psomadakis | devices = serializer.LoadJson(output) |
1180 | bdecfea2 | Stratos Psomadakis | except ValueError, err: |
1181 | 89ff748d | Thomas Thrainer | base.ThrowError("Unable to parse JSON data: %s" % err)
|
1182 | bdecfea2 | Stratos Psomadakis | |
1183 | bdecfea2 | Stratos Psomadakis | rbd_dev = None
|
1184 | bdecfea2 | Stratos Psomadakis | for d in devices.values(): # pylint: disable=E1103 |
1185 | bdecfea2 | Stratos Psomadakis | try:
|
1186 | bdecfea2 | Stratos Psomadakis | name = d["name"]
|
1187 | bdecfea2 | Stratos Psomadakis | except KeyError: |
1188 | 89ff748d | Thomas Thrainer | base.ThrowError("'name' key missing from json object %s", devices)
|
1189 | bdecfea2 | Stratos Psomadakis | |
1190 | bdecfea2 | Stratos Psomadakis | if name == volume_name:
|
1191 | bdecfea2 | Stratos Psomadakis | if rbd_dev is not None: |
1192 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd volume %s is mapped more than once", volume_name)
|
1193 | bdecfea2 | Stratos Psomadakis | |
1194 | bdecfea2 | Stratos Psomadakis | rbd_dev = d["device"]
|
1195 | bdecfea2 | Stratos Psomadakis | |
1196 | bdecfea2 | Stratos Psomadakis | return rbd_dev
|
1197 | bdecfea2 | Stratos Psomadakis | |
1198 | 7181fba0 | Constantinos Venetsanopoulos | @staticmethod
|
1199 | bdecfea2 | Stratos Psomadakis | def _ParseRbdShowmappedPlain(output, volume_name): |
1200 | bdecfea2 | Stratos Psomadakis | """Parse the (plain / text) output of `rbd showmapped'.
|
1201 | 7181fba0 | Constantinos Venetsanopoulos |
|
1202 | 7181fba0 | Constantinos Venetsanopoulos | This method parses the output of `rbd showmapped' and returns
|
1203 | 7181fba0 | Constantinos Venetsanopoulos | the rbd block device path (e.g. /dev/rbd0) that matches the
|
1204 | 7181fba0 | Constantinos Venetsanopoulos | given rbd volume.
|
1205 | 7181fba0 | Constantinos Venetsanopoulos |
|
1206 | 7181fba0 | Constantinos Venetsanopoulos | @type output: string
|
1207 | bdecfea2 | Stratos Psomadakis | @param output: the plain text output of `rbd showmapped'
|
1208 | 7181fba0 | Constantinos Venetsanopoulos | @type volume_name: string
|
1209 | 7181fba0 | Constantinos Venetsanopoulos | @param volume_name: the name of the volume whose device we search for
|
1210 | 7181fba0 | Constantinos Venetsanopoulos | @rtype: string or None
|
1211 | 7181fba0 | Constantinos Venetsanopoulos | @return: block device path if the volume is mapped, else None
|
1212 | 7181fba0 | Constantinos Venetsanopoulos |
|
1213 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1214 | 7181fba0 | Constantinos Venetsanopoulos | allfields = 5
|
1215 | 7181fba0 | Constantinos Venetsanopoulos | volumefield = 2
|
1216 | 7181fba0 | Constantinos Venetsanopoulos | devicefield = 4
|
1217 | 7181fba0 | Constantinos Venetsanopoulos | |
1218 | 7181fba0 | Constantinos Venetsanopoulos | lines = output.splitlines() |
1219 | 7181fba0 | Constantinos Venetsanopoulos | |
1220 | bdecfea2 | Stratos Psomadakis | # Try parsing the new output format (ceph >= 0.55).
|
1221 | bdecfea2 | Stratos Psomadakis | splitted_lines = map(lambda l: l.split(), lines) |
1222 | bdecfea2 | Stratos Psomadakis | |
1223 | bdecfea2 | Stratos Psomadakis | # Check for empty output.
|
1224 | 7181fba0 | Constantinos Venetsanopoulos | if not splitted_lines: |
1225 | bdecfea2 | Stratos Psomadakis | return None |
1226 | 7181fba0 | Constantinos Venetsanopoulos | |
1227 | bdecfea2 | Stratos Psomadakis | # Check showmapped output, to determine number of fields.
|
1228 | 7181fba0 | Constantinos Venetsanopoulos | field_cnt = len(splitted_lines[0]) |
1229 | 7181fba0 | Constantinos Venetsanopoulos | if field_cnt != allfields:
|
1230 | bdecfea2 | Stratos Psomadakis | # Parsing the new format failed. Fallback to parsing the old output
|
1231 | bdecfea2 | Stratos Psomadakis | # format (< 0.55).
|
1232 | bdecfea2 | Stratos Psomadakis | splitted_lines = map(lambda l: l.split("\t"), lines) |
1233 | bdecfea2 | Stratos Psomadakis | if field_cnt != allfields:
|
1234 | 89ff748d | Thomas Thrainer | base.ThrowError("Cannot parse rbd showmapped output expected %s fields,"
|
1235 | 89ff748d | Thomas Thrainer | " found %s", allfields, field_cnt)
|
1236 | 7181fba0 | Constantinos Venetsanopoulos | |
1237 | 7181fba0 | Constantinos Venetsanopoulos | matched_lines = \ |
1238 | 7181fba0 | Constantinos Venetsanopoulos | filter(lambda l: len(l) == allfields and l[volumefield] == volume_name, |
1239 | 7181fba0 | Constantinos Venetsanopoulos | splitted_lines) |
1240 | 7181fba0 | Constantinos Venetsanopoulos | |
1241 | 7181fba0 | Constantinos Venetsanopoulos | if len(matched_lines) > 1: |
1242 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd volume %s mapped more than once", volume_name)
|
1243 | 7181fba0 | Constantinos Venetsanopoulos | |
1244 | 7181fba0 | Constantinos Venetsanopoulos | if matched_lines:
|
1245 | 7181fba0 | Constantinos Venetsanopoulos | # rbd block device found. Return it.
|
1246 | 7181fba0 | Constantinos Venetsanopoulos | rbd_dev = matched_lines[0][devicefield]
|
1247 | 7181fba0 | Constantinos Venetsanopoulos | return rbd_dev
|
1248 | 7181fba0 | Constantinos Venetsanopoulos | |
1249 | 7181fba0 | Constantinos Venetsanopoulos | # The given volume is not mapped.
|
1250 | 7181fba0 | Constantinos Venetsanopoulos | return None |
1251 | 7181fba0 | Constantinos Venetsanopoulos | |
1252 | 7181fba0 | Constantinos Venetsanopoulos | def Assemble(self): |
1253 | 7181fba0 | Constantinos Venetsanopoulos | """Assemble the device.
|
1254 | 7181fba0 | Constantinos Venetsanopoulos |
|
1255 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1256 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1257 | 7181fba0 | Constantinos Venetsanopoulos | |
1258 | 7181fba0 | Constantinos Venetsanopoulos | def Shutdown(self): |
1259 | 7181fba0 | Constantinos Venetsanopoulos | """Shutdown the device.
|
1260 | 7181fba0 | Constantinos Venetsanopoulos |
|
1261 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1262 | 7181fba0 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1263 | 7181fba0 | Constantinos Venetsanopoulos | # The rbd device doesn't exist.
|
1264 | 7181fba0 | Constantinos Venetsanopoulos | return
|
1265 | 7181fba0 | Constantinos Venetsanopoulos | |
1266 | 7181fba0 | Constantinos Venetsanopoulos | # Unmap the block device from the Volume.
|
1267 | 7181fba0 | Constantinos Venetsanopoulos | self._UnmapVolumeFromBlockdev(self.unique_id) |
1268 | 7181fba0 | Constantinos Venetsanopoulos | |
1269 | 7181fba0 | Constantinos Venetsanopoulos | self.minor = None |
1270 | 7181fba0 | Constantinos Venetsanopoulos | self.dev_path = None |
1271 | 7181fba0 | Constantinos Venetsanopoulos | |
1272 | 7181fba0 | Constantinos Venetsanopoulos | def _UnmapVolumeFromBlockdev(self, unique_id): |
1273 | 7181fba0 | Constantinos Venetsanopoulos | """Unmaps the rbd device from the Volume it is mapped.
|
1274 | 7181fba0 | Constantinos Venetsanopoulos |
|
1275 | 7181fba0 | Constantinos Venetsanopoulos | Unmaps the rbd device from the Volume it was previously mapped to.
|
1276 | 7181fba0 | Constantinos Venetsanopoulos | This method should be idempotent if the Volume isn't mapped.
|
1277 | 7181fba0 | Constantinos Venetsanopoulos |
|
1278 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1279 | 7181fba0 | Constantinos Venetsanopoulos | pool = self.params[constants.LDP_POOL]
|
1280 | 7181fba0 | Constantinos Venetsanopoulos | name = unique_id[1]
|
1281 | 7181fba0 | Constantinos Venetsanopoulos | |
1282 | 7181fba0 | Constantinos Venetsanopoulos | # Check if the mapping already exists.
|
1283 | bdecfea2 | Stratos Psomadakis | rbd_dev = self._VolumeToBlockdev(pool, name)
|
1284 | 7181fba0 | Constantinos Venetsanopoulos | |
1285 | 7181fba0 | Constantinos Venetsanopoulos | if rbd_dev:
|
1286 | 7181fba0 | Constantinos Venetsanopoulos | # The mapping exists. Unmap the rbd device.
|
1287 | 7181fba0 | Constantinos Venetsanopoulos | unmap_cmd = [constants.RBD_CMD, "unmap", "%s" % rbd_dev] |
1288 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(unmap_cmd) |
1289 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1290 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd unmap failed (%s): %s",
|
1291 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1292 | 7181fba0 | Constantinos Venetsanopoulos | |
1293 | 7181fba0 | Constantinos Venetsanopoulos | def Open(self, force=False): |
1294 | 7181fba0 | Constantinos Venetsanopoulos | """Make the device ready for I/O.
|
1295 | 7181fba0 | Constantinos Venetsanopoulos |
|
1296 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1297 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1298 | 7181fba0 | Constantinos Venetsanopoulos | |
1299 | 7181fba0 | Constantinos Venetsanopoulos | def Close(self): |
1300 | 7181fba0 | Constantinos Venetsanopoulos | """Notifies that the device will no longer be used for I/O.
|
1301 | 7181fba0 | Constantinos Venetsanopoulos |
|
1302 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1303 | 7181fba0 | Constantinos Venetsanopoulos | pass
|
1304 | 7181fba0 | Constantinos Venetsanopoulos | |
1305 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
1306 | 7181fba0 | Constantinos Venetsanopoulos | """Grow the Volume.
|
1307 | 7181fba0 | Constantinos Venetsanopoulos |
|
1308 | 7181fba0 | Constantinos Venetsanopoulos | @type amount: integer
|
1309 | 7181fba0 | Constantinos Venetsanopoulos | @param amount: the amount (in mebibytes) to grow with
|
1310 | 7181fba0 | Constantinos Venetsanopoulos | @type dryrun: boolean
|
1311 | 7181fba0 | Constantinos Venetsanopoulos | @param dryrun: whether to execute the operation in simulation mode
|
1312 | 7181fba0 | Constantinos Venetsanopoulos | only, without actually increasing the size
|
1313 | 7181fba0 | Constantinos Venetsanopoulos |
|
1314 | 7181fba0 | Constantinos Venetsanopoulos | """
|
1315 | cad0723b | Iustin Pop | if not backingstore: |
1316 | cad0723b | Iustin Pop | return
|
1317 | 7181fba0 | Constantinos Venetsanopoulos | if not self.Attach(): |
1318 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't attach to rbd device during Grow()")
|
1319 | 7181fba0 | Constantinos Venetsanopoulos | |
1320 | 7181fba0 | Constantinos Venetsanopoulos | if dryrun:
|
1321 | 7181fba0 | Constantinos Venetsanopoulos | # the rbd tool does not support dry runs of resize operations.
|
1322 | 7181fba0 | Constantinos Venetsanopoulos | # Since rbd volumes are thinly provisioned, we assume
|
1323 | 7181fba0 | Constantinos Venetsanopoulos | # there is always enough free space for the operation.
|
1324 | 7181fba0 | Constantinos Venetsanopoulos | return
|
1325 | 7181fba0 | Constantinos Venetsanopoulos | |
1326 | 7181fba0 | Constantinos Venetsanopoulos | rbd_pool = self.params[constants.LDP_POOL]
|
1327 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name = self.unique_id[1] |
1328 | 7181fba0 | Constantinos Venetsanopoulos | new_size = self.size + amount
|
1329 | 7181fba0 | Constantinos Venetsanopoulos | |
1330 | 7181fba0 | Constantinos Venetsanopoulos | # Resize the rbd volume (Image) inside the RADOS cluster.
|
1331 | 7181fba0 | Constantinos Venetsanopoulos | cmd = [constants.RBD_CMD, "resize", "-p", rbd_pool, |
1332 | 7181fba0 | Constantinos Venetsanopoulos | rbd_name, "--size", "%s" % new_size] |
1333 | 7181fba0 | Constantinos Venetsanopoulos | result = utils.RunCmd(cmd) |
1334 | 7181fba0 | Constantinos Venetsanopoulos | if result.failed:
|
1335 | 89ff748d | Thomas Thrainer | base.ThrowError("rbd resize failed (%s): %s",
|
1336 | 89ff748d | Thomas Thrainer | result.fail_reason, result.output) |
1337 | 7181fba0 | Constantinos Venetsanopoulos | |
1338 | 7181fba0 | Constantinos Venetsanopoulos | |
1339 | 89ff748d | Thomas Thrainer | class ExtStorageDevice(base.BlockDev): |
1340 | 376631d1 | Constantinos Venetsanopoulos | """A block device provided by an ExtStorage Provider.
|
1341 | 376631d1 | Constantinos Venetsanopoulos |
|
1342 | 376631d1 | Constantinos Venetsanopoulos | This class implements the External Storage Interface, which means
|
1343 | 376631d1 | Constantinos Venetsanopoulos | handling of the externally provided block devices.
|
1344 | 376631d1 | Constantinos Venetsanopoulos |
|
1345 | 376631d1 | Constantinos Venetsanopoulos | """
|
1346 | 376631d1 | Constantinos Venetsanopoulos | def __init__(self, unique_id, children, size, params): |
1347 | 376631d1 | Constantinos Venetsanopoulos | """Attaches to an extstorage block device.
|
1348 | 376631d1 | Constantinos Venetsanopoulos |
|
1349 | 376631d1 | Constantinos Venetsanopoulos | """
|
1350 | 376631d1 | Constantinos Venetsanopoulos | super(ExtStorageDevice, self).__init__(unique_id, children, size, params) |
1351 | 376631d1 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1352 | 376631d1 | Constantinos Venetsanopoulos | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1353 | 376631d1 | Constantinos Venetsanopoulos | |
1354 | 376631d1 | Constantinos Venetsanopoulos | self.driver, self.vol_name = unique_id |
1355 | 938adc87 | Constantinos Venetsanopoulos | self.ext_params = params
|
1356 | 376631d1 | Constantinos Venetsanopoulos | |
1357 | 376631d1 | Constantinos Venetsanopoulos | self.major = self.minor = None |
1358 | 376631d1 | Constantinos Venetsanopoulos | self.Attach()
|
1359 | 376631d1 | Constantinos Venetsanopoulos | |
1360 | 376631d1 | Constantinos Venetsanopoulos | @classmethod
|
1361 | 24c06acb | Bernardo Dal Seno | def Create(cls, unique_id, children, size, spindles, params, excl_stor): |
1362 | 376631d1 | Constantinos Venetsanopoulos | """Create a new extstorage device.
|
1363 | 376631d1 | Constantinos Venetsanopoulos |
|
1364 | 376631d1 | Constantinos Venetsanopoulos | Provision a new volume using an extstorage provider, which will
|
1365 | 376631d1 | Constantinos Venetsanopoulos | then be mapped to a block device.
|
1366 | 376631d1 | Constantinos Venetsanopoulos |
|
1367 | 376631d1 | Constantinos Venetsanopoulos | """
|
1368 | 376631d1 | Constantinos Venetsanopoulos | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1369 | 376631d1 | Constantinos Venetsanopoulos | raise errors.ProgrammerError("Invalid configuration data %s" % |
1370 | 376631d1 | Constantinos Venetsanopoulos | str(unique_id))
|
1371 | ee1478e5 | Bernardo Dal Seno | if excl_stor:
|
1372 | ee1478e5 | Bernardo Dal Seno | raise errors.ProgrammerError("extstorage device requested with" |
1373 | ee1478e5 | Bernardo Dal Seno | " exclusive_storage")
|
1374 | 376631d1 | Constantinos Venetsanopoulos | |
1375 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's create script,
|
1376 | 376631d1 | Constantinos Venetsanopoulos | # to provision a new Volume inside the External Storage
|
1377 | 938adc87 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_CREATE, unique_id, |
1378 | 938adc87 | Constantinos Venetsanopoulos | params, str(size))
|
1379 | 376631d1 | Constantinos Venetsanopoulos | |
1380 | 376631d1 | Constantinos Venetsanopoulos | return ExtStorageDevice(unique_id, children, size, params)
|
1381 | 376631d1 | Constantinos Venetsanopoulos | |
1382 | 376631d1 | Constantinos Venetsanopoulos | def Remove(self): |
1383 | 376631d1 | Constantinos Venetsanopoulos | """Remove the extstorage device.
|
1384 | 376631d1 | Constantinos Venetsanopoulos |
|
1385 | 376631d1 | Constantinos Venetsanopoulos | """
|
1386 | 376631d1 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1387 | 376631d1 | Constantinos Venetsanopoulos | # The extstorage device doesn't exist.
|
1388 | 376631d1 | Constantinos Venetsanopoulos | return
|
1389 | 376631d1 | Constantinos Venetsanopoulos | |
1390 | 376631d1 | Constantinos Venetsanopoulos | # First shutdown the device (remove mappings).
|
1391 | 376631d1 | Constantinos Venetsanopoulos | self.Shutdown()
|
1392 | 376631d1 | Constantinos Venetsanopoulos | |
1393 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's remove script,
|
1394 | 376631d1 | Constantinos Venetsanopoulos | # to remove the Volume from the External Storage
|
1395 | 938adc87 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_REMOVE, self.unique_id,
|
1396 | 938adc87 | Constantinos Venetsanopoulos | self.ext_params)
|
1397 | 376631d1 | Constantinos Venetsanopoulos | |
1398 | 376631d1 | Constantinos Venetsanopoulos | def Rename(self, new_id): |
1399 | 376631d1 | Constantinos Venetsanopoulos | """Rename this device.
|
1400 | 376631d1 | Constantinos Venetsanopoulos |
|
1401 | 376631d1 | Constantinos Venetsanopoulos | """
|
1402 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1403 | 376631d1 | Constantinos Venetsanopoulos | |
1404 | 376631d1 | Constantinos Venetsanopoulos | def Attach(self): |
1405 | 376631d1 | Constantinos Venetsanopoulos | """Attach to an existing extstorage device.
|
1406 | 376631d1 | Constantinos Venetsanopoulos |
|
1407 | 376631d1 | Constantinos Venetsanopoulos | This method maps the extstorage volume that matches our name with
|
1408 | 376631d1 | Constantinos Venetsanopoulos | a corresponding block device and then attaches to this device.
|
1409 | 376631d1 | Constantinos Venetsanopoulos |
|
1410 | 376631d1 | Constantinos Venetsanopoulos | """
|
1411 | 376631d1 | Constantinos Venetsanopoulos | self.attached = False |
1412 | 376631d1 | Constantinos Venetsanopoulos | |
1413 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's attach script,
|
1414 | 376631d1 | Constantinos Venetsanopoulos | # to attach an existing Volume to a block device under /dev
|
1415 | 376631d1 | Constantinos Venetsanopoulos | self.dev_path = _ExtStorageAction(constants.ES_ACTION_ATTACH,
|
1416 | 938adc87 | Constantinos Venetsanopoulos | self.unique_id, self.ext_params) |
1417 | 376631d1 | Constantinos Venetsanopoulos | |
1418 | 376631d1 | Constantinos Venetsanopoulos | try:
|
1419 | 376631d1 | Constantinos Venetsanopoulos | st = os.stat(self.dev_path)
|
1420 | 376631d1 | Constantinos Venetsanopoulos | except OSError, err: |
1421 | 376631d1 | Constantinos Venetsanopoulos | logging.error("Error stat()'ing %s: %s", self.dev_path, str(err)) |
1422 | 376631d1 | Constantinos Venetsanopoulos | return False |
1423 | 376631d1 | Constantinos Venetsanopoulos | |
1424 | 376631d1 | Constantinos Venetsanopoulos | if not stat.S_ISBLK(st.st_mode): |
1425 | 376631d1 | Constantinos Venetsanopoulos | logging.error("%s is not a block device", self.dev_path) |
1426 | 376631d1 | Constantinos Venetsanopoulos | return False |
1427 | 376631d1 | Constantinos Venetsanopoulos | |
1428 | 376631d1 | Constantinos Venetsanopoulos | self.major = os.major(st.st_rdev)
|
1429 | 376631d1 | Constantinos Venetsanopoulos | self.minor = os.minor(st.st_rdev)
|
1430 | 376631d1 | Constantinos Venetsanopoulos | self.attached = True |
1431 | 376631d1 | Constantinos Venetsanopoulos | |
1432 | 376631d1 | Constantinos Venetsanopoulos | return True |
1433 | 376631d1 | Constantinos Venetsanopoulos | |
1434 | 376631d1 | Constantinos Venetsanopoulos | def Assemble(self): |
1435 | 376631d1 | Constantinos Venetsanopoulos | """Assemble the device.
|
1436 | 376631d1 | Constantinos Venetsanopoulos |
|
1437 | 376631d1 | Constantinos Venetsanopoulos | """
|
1438 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1439 | 376631d1 | Constantinos Venetsanopoulos | |
1440 | 376631d1 | Constantinos Venetsanopoulos | def Shutdown(self): |
1441 | 376631d1 | Constantinos Venetsanopoulos | """Shutdown the device.
|
1442 | 376631d1 | Constantinos Venetsanopoulos |
|
1443 | 376631d1 | Constantinos Venetsanopoulos | """
|
1444 | 376631d1 | Constantinos Venetsanopoulos | if not self.minor and not self.Attach(): |
1445 | 376631d1 | Constantinos Venetsanopoulos | # The extstorage device doesn't exist.
|
1446 | 376631d1 | Constantinos Venetsanopoulos | return
|
1447 | 376631d1 | Constantinos Venetsanopoulos | |
1448 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's detach script,
|
1449 | 376631d1 | Constantinos Venetsanopoulos | # to detach an existing Volume from it's block device under /dev
|
1450 | 938adc87 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_DETACH, self.unique_id,
|
1451 | 938adc87 | Constantinos Venetsanopoulos | self.ext_params)
|
1452 | 376631d1 | Constantinos Venetsanopoulos | |
1453 | 376631d1 | Constantinos Venetsanopoulos | self.minor = None |
1454 | 376631d1 | Constantinos Venetsanopoulos | self.dev_path = None |
1455 | 376631d1 | Constantinos Venetsanopoulos | |
1456 | 376631d1 | Constantinos Venetsanopoulos | def Open(self, force=False): |
1457 | 376631d1 | Constantinos Venetsanopoulos | """Make the device ready for I/O.
|
1458 | 376631d1 | Constantinos Venetsanopoulos |
|
1459 | 376631d1 | Constantinos Venetsanopoulos | """
|
1460 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1461 | 376631d1 | Constantinos Venetsanopoulos | |
1462 | 376631d1 | Constantinos Venetsanopoulos | def Close(self): |
1463 | 376631d1 | Constantinos Venetsanopoulos | """Notifies that the device will no longer be used for I/O.
|
1464 | 376631d1 | Constantinos Venetsanopoulos |
|
1465 | 376631d1 | Constantinos Venetsanopoulos | """
|
1466 | 376631d1 | Constantinos Venetsanopoulos | pass
|
1467 | 376631d1 | Constantinos Venetsanopoulos | |
1468 | be9150ea | Bernardo Dal Seno | def Grow(self, amount, dryrun, backingstore, excl_stor): |
1469 | 376631d1 | Constantinos Venetsanopoulos | """Grow the Volume.
|
1470 | 376631d1 | Constantinos Venetsanopoulos |
|
1471 | 376631d1 | Constantinos Venetsanopoulos | @type amount: integer
|
1472 | 376631d1 | Constantinos Venetsanopoulos | @param amount: the amount (in mebibytes) to grow with
|
1473 | 376631d1 | Constantinos Venetsanopoulos | @type dryrun: boolean
|
1474 | 376631d1 | Constantinos Venetsanopoulos | @param dryrun: whether to execute the operation in simulation mode
|
1475 | 376631d1 | Constantinos Venetsanopoulos | only, without actually increasing the size
|
1476 | 376631d1 | Constantinos Venetsanopoulos |
|
1477 | 376631d1 | Constantinos Venetsanopoulos | """
|
1478 | 376631d1 | Constantinos Venetsanopoulos | if not backingstore: |
1479 | 376631d1 | Constantinos Venetsanopoulos | return
|
1480 | 376631d1 | Constantinos Venetsanopoulos | if not self.Attach(): |
1481 | 89ff748d | Thomas Thrainer | base.ThrowError("Can't attach to extstorage device during Grow()")
|
1482 | 376631d1 | Constantinos Venetsanopoulos | |
1483 | 376631d1 | Constantinos Venetsanopoulos | if dryrun:
|
1484 | 376631d1 | Constantinos Venetsanopoulos | # we do not support dry runs of resize operations for now.
|
1485 | 376631d1 | Constantinos Venetsanopoulos | return
|
1486 | 376631d1 | Constantinos Venetsanopoulos | |
1487 | 376631d1 | Constantinos Venetsanopoulos | new_size = self.size + amount
|
1488 | 376631d1 | Constantinos Venetsanopoulos | |
1489 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's grow script,
|
1490 | 376631d1 | Constantinos Venetsanopoulos | # to grow an existing Volume inside the External Storage
|
1491 | 376631d1 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_GROW, self.unique_id,
|
1492 | 938adc87 | Constantinos Venetsanopoulos | self.ext_params, str(self.size), grow=str(new_size)) |
1493 | 376631d1 | Constantinos Venetsanopoulos | |
1494 | 376631d1 | Constantinos Venetsanopoulos | def SetInfo(self, text): |
1495 | 376631d1 | Constantinos Venetsanopoulos | """Update metadata with info text.
|
1496 | 376631d1 | Constantinos Venetsanopoulos |
|
1497 | 376631d1 | Constantinos Venetsanopoulos | """
|
1498 | 376631d1 | Constantinos Venetsanopoulos | # Replace invalid characters
|
1499 | 376631d1 | Constantinos Venetsanopoulos | text = re.sub("^[^A-Za-z0-9_+.]", "_", text) |
1500 | 376631d1 | Constantinos Venetsanopoulos | text = re.sub("[^-A-Za-z0-9_+.]", "_", text) |
1501 | 376631d1 | Constantinos Venetsanopoulos | |
1502 | 376631d1 | Constantinos Venetsanopoulos | # Only up to 128 characters are allowed
|
1503 | 376631d1 | Constantinos Venetsanopoulos | text = text[:128]
|
1504 | 376631d1 | Constantinos Venetsanopoulos | |
1505 | 376631d1 | Constantinos Venetsanopoulos | # Call the External Storage's setinfo script,
|
1506 | 376631d1 | Constantinos Venetsanopoulos | # to set metadata for an existing Volume inside the External Storage
|
1507 | 376631d1 | Constantinos Venetsanopoulos | _ExtStorageAction(constants.ES_ACTION_SETINFO, self.unique_id,
|
1508 | 938adc87 | Constantinos Venetsanopoulos | self.ext_params, metadata=text)
|
1509 | 376631d1 | Constantinos Venetsanopoulos | |
1510 | 376631d1 | Constantinos Venetsanopoulos | |
1511 | 938adc87 | Constantinos Venetsanopoulos | def _ExtStorageAction(action, unique_id, ext_params, |
1512 | 938adc87 | Constantinos Venetsanopoulos | size=None, grow=None, metadata=None): |
1513 | 376631d1 | Constantinos Venetsanopoulos | """Take an External Storage action.
|
1514 | 376631d1 | Constantinos Venetsanopoulos |
|
1515 | 376631d1 | Constantinos Venetsanopoulos | Take an External Storage action concerning or affecting
|
1516 | 376631d1 | Constantinos Venetsanopoulos | a specific Volume inside the External Storage.
|
1517 | 376631d1 | Constantinos Venetsanopoulos |
|
1518 | 376631d1 | Constantinos Venetsanopoulos | @type action: string
|
1519 | 376631d1 | Constantinos Venetsanopoulos | @param action: which action to perform. One of:
|
1520 | 376631d1 | Constantinos Venetsanopoulos | create / remove / grow / attach / detach
|
1521 | 376631d1 | Constantinos Venetsanopoulos | @type unique_id: tuple (driver, vol_name)
|
1522 | 376631d1 | Constantinos Venetsanopoulos | @param unique_id: a tuple containing the type of ExtStorage (driver)
|
1523 | 376631d1 | Constantinos Venetsanopoulos | and the Volume name
|
1524 | 938adc87 | Constantinos Venetsanopoulos | @type ext_params: dict
|
1525 | 938adc87 | Constantinos Venetsanopoulos | @param ext_params: ExtStorage parameters
|
1526 | 376631d1 | Constantinos Venetsanopoulos | @type size: integer
|
1527 | 376631d1 | Constantinos Venetsanopoulos | @param size: the size of the Volume in mebibytes
|
1528 | 376631d1 | Constantinos Venetsanopoulos | @type grow: integer
|
1529 | 376631d1 | Constantinos Venetsanopoulos | @param grow: the new size in mebibytes (after grow)
|
1530 | 376631d1 | Constantinos Venetsanopoulos | @type metadata: string
|
1531 | 376631d1 | Constantinos Venetsanopoulos | @param metadata: metadata info of the Volume, for use by the provider
|
1532 | 376631d1 | Constantinos Venetsanopoulos | @rtype: None or a block device path (during attach)
|
1533 | 376631d1 | Constantinos Venetsanopoulos |
|
1534 | 376631d1 | Constantinos Venetsanopoulos | """
|
1535 | 376631d1 | Constantinos Venetsanopoulos | driver, vol_name = unique_id |
1536 | 376631d1 | Constantinos Venetsanopoulos | |
1537 | 376631d1 | Constantinos Venetsanopoulos | # Create an External Storage instance of type `driver'
|
1538 | 376631d1 | Constantinos Venetsanopoulos | status, inst_es = ExtStorageFromDisk(driver) |
1539 | 376631d1 | Constantinos Venetsanopoulos | if not status: |
1540 | 89ff748d | Thomas Thrainer | base.ThrowError("%s" % inst_es)
|
1541 | 376631d1 | Constantinos Venetsanopoulos | |
1542 | 376631d1 | Constantinos Venetsanopoulos | # Create the basic environment for the driver's scripts
|
1543 | 938adc87 | Constantinos Venetsanopoulos | create_env = _ExtStorageEnvironment(unique_id, ext_params, size, |
1544 | 938adc87 | Constantinos Venetsanopoulos | grow, metadata) |
1545 | 376631d1 | Constantinos Venetsanopoulos | |
1546 | 376631d1 | Constantinos Venetsanopoulos | # Do not use log file for action `attach' as we need
|
1547 | 376631d1 | Constantinos Venetsanopoulos | # to get the output from RunResult
|
1548 | 376631d1 | Constantinos Venetsanopoulos | # TODO: find a way to have a log file for attach too
|
1549 | 376631d1 | Constantinos Venetsanopoulos | logfile = None
|
1550 | 376631d1 | Constantinos Venetsanopoulos | if action is not constants.ES_ACTION_ATTACH: |
1551 | 376631d1 | Constantinos Venetsanopoulos | logfile = _VolumeLogName(action, driver, vol_name) |
1552 | 376631d1 | Constantinos Venetsanopoulos | |
1553 | 376631d1 | Constantinos Venetsanopoulos | # Make sure the given action results in a valid script
|
1554 | 376631d1 | Constantinos Venetsanopoulos | if action not in constants.ES_SCRIPTS: |
1555 | 89ff748d | Thomas Thrainer | base.ThrowError("Action '%s' doesn't result in a valid ExtStorage script" %
|
1556 | 89ff748d | Thomas Thrainer | action) |
1557 | 376631d1 | Constantinos Venetsanopoulos | |
1558 | 376631d1 | Constantinos Venetsanopoulos | # Find out which external script to run according the given action
|
1559 | 376631d1 | Constantinos Venetsanopoulos | script_name = action + "_script"
|
1560 | 376631d1 | Constantinos Venetsanopoulos | script = getattr(inst_es, script_name)
|
1561 | 376631d1 | Constantinos Venetsanopoulos | |
1562 | 376631d1 | Constantinos Venetsanopoulos | # Run the external script
|
1563 | 376631d1 | Constantinos Venetsanopoulos | result = utils.RunCmd([script], env=create_env, |
1564 | 376631d1 | Constantinos Venetsanopoulos | cwd=inst_es.path, output=logfile,) |
1565 | 376631d1 | Constantinos Venetsanopoulos | if result.failed:
|
1566 | 376631d1 | Constantinos Venetsanopoulos | logging.error("External storage's %s command '%s' returned"
|
1567 | 376631d1 | Constantinos Venetsanopoulos | " error: %s, logfile: %s, output: %s",
|
1568 | 376631d1 | Constantinos Venetsanopoulos | action, result.cmd, result.fail_reason, |
1569 | 376631d1 | Constantinos Venetsanopoulos | logfile, result.output) |
1570 | 376631d1 | Constantinos Venetsanopoulos | |
1571 | 376631d1 | Constantinos Venetsanopoulos | # If logfile is 'None' (during attach), it breaks TailFile
|
1572 | 376631d1 | Constantinos Venetsanopoulos | # TODO: have a log file for attach too
|
1573 | 376631d1 | Constantinos Venetsanopoulos | if action is not constants.ES_ACTION_ATTACH: |
1574 | 376631d1 | Constantinos Venetsanopoulos | lines = [utils.SafeEncode(val) |
1575 | 376631d1 | Constantinos Venetsanopoulos | for val in utils.TailFile(logfile, lines=20)] |
1576 | 376631d1 | Constantinos Venetsanopoulos | else:
|
1577 | 376631d1 | Constantinos Venetsanopoulos | lines = result.output[-20:]
|
1578 | 376631d1 | Constantinos Venetsanopoulos | |
1579 | 89ff748d | Thomas Thrainer | base.ThrowError("External storage's %s script failed (%s), last"
|
1580 | 89ff748d | Thomas Thrainer | " lines of output:\n%s",
|
1581 | 89ff748d | Thomas Thrainer | action, result.fail_reason, "\n".join(lines))
|
1582 | 376631d1 | Constantinos Venetsanopoulos | |
1583 | 376631d1 | Constantinos Venetsanopoulos | if action == constants.ES_ACTION_ATTACH:
|
1584 | 376631d1 | Constantinos Venetsanopoulos | return result.stdout
|
1585 | 376631d1 | Constantinos Venetsanopoulos | |
1586 | 376631d1 | Constantinos Venetsanopoulos | |
1587 | 376631d1 | Constantinos Venetsanopoulos | def ExtStorageFromDisk(name, base_dir=None): |
1588 | 376631d1 | Constantinos Venetsanopoulos | """Create an ExtStorage instance from disk.
|
1589 | 376631d1 | Constantinos Venetsanopoulos |
|
1590 | 376631d1 | Constantinos Venetsanopoulos | This function will return an ExtStorage instance
|
1591 | 376631d1 | Constantinos Venetsanopoulos | if the given name is a valid ExtStorage name.
|
1592 | 376631d1 | Constantinos Venetsanopoulos |
|
1593 | 376631d1 | Constantinos Venetsanopoulos | @type base_dir: string
|
1594 | 376631d1 | Constantinos Venetsanopoulos | @keyword base_dir: Base directory containing ExtStorage installations.
|
1595 | 376631d1 | Constantinos Venetsanopoulos | Defaults to a search in all the ES_SEARCH_PATH dirs.
|
1596 | 376631d1 | Constantinos Venetsanopoulos | @rtype: tuple
|
1597 | 376631d1 | Constantinos Venetsanopoulos | @return: True and the ExtStorage instance if we find a valid one, or
|
1598 | 376631d1 | Constantinos Venetsanopoulos | False and the diagnose message on error
|
1599 | 376631d1 | Constantinos Venetsanopoulos |
|
1600 | 376631d1 | Constantinos Venetsanopoulos | """
|
1601 | 376631d1 | Constantinos Venetsanopoulos | if base_dir is None: |
1602 | 376631d1 | Constantinos Venetsanopoulos | es_base_dir = pathutils.ES_SEARCH_PATH |
1603 | 376631d1 | Constantinos Venetsanopoulos | else:
|
1604 | 376631d1 | Constantinos Venetsanopoulos | es_base_dir = [base_dir] |
1605 | 376631d1 | Constantinos Venetsanopoulos | |
1606 | 376631d1 | Constantinos Venetsanopoulos | es_dir = utils.FindFile(name, es_base_dir, os.path.isdir) |
1607 | 376631d1 | Constantinos Venetsanopoulos | |
1608 | 376631d1 | Constantinos Venetsanopoulos | if es_dir is None: |
1609 | 376631d1 | Constantinos Venetsanopoulos | return False, ("Directory for External Storage Provider %s not" |
1610 | 376631d1 | Constantinos Venetsanopoulos | " found in search path" % name)
|
1611 | 376631d1 | Constantinos Venetsanopoulos | |
1612 | 376631d1 | Constantinos Venetsanopoulos | # ES Files dictionary, we will populate it with the absolute path
|
1613 | 376631d1 | Constantinos Venetsanopoulos | # names; if the value is True, then it is a required file, otherwise
|
1614 | 376631d1 | Constantinos Venetsanopoulos | # an optional one
|
1615 | 376631d1 | Constantinos Venetsanopoulos | es_files = dict.fromkeys(constants.ES_SCRIPTS, True) |
1616 | 376631d1 | Constantinos Venetsanopoulos | |
1617 | 938adc87 | Constantinos Venetsanopoulos | es_files[constants.ES_PARAMETERS_FILE] = True
|
1618 | 938adc87 | Constantinos Venetsanopoulos | |
1619 | 938adc87 | Constantinos Venetsanopoulos | for (filename, _) in es_files.items(): |
1620 | 376631d1 | Constantinos Venetsanopoulos | es_files[filename] = utils.PathJoin(es_dir, filename) |
1621 | 376631d1 | Constantinos Venetsanopoulos | |
1622 | 376631d1 | Constantinos Venetsanopoulos | try:
|
1623 | 376631d1 | Constantinos Venetsanopoulos | st = os.stat(es_files[filename]) |
1624 | 376631d1 | Constantinos Venetsanopoulos | except EnvironmentError, err: |
1625 | 376631d1 | Constantinos Venetsanopoulos | return False, ("File '%s' under path '%s' is missing (%s)" % |
1626 | 376631d1 | Constantinos Venetsanopoulos | (filename, es_dir, utils.ErrnoOrStr(err))) |
1627 | 376631d1 | Constantinos Venetsanopoulos | |
1628 | 376631d1 | Constantinos Venetsanopoulos | if not stat.S_ISREG(stat.S_IFMT(st.st_mode)): |
1629 | 376631d1 | Constantinos Venetsanopoulos | return False, ("File '%s' under path '%s' is not a regular file" % |
1630 | 376631d1 | Constantinos Venetsanopoulos | (filename, es_dir)) |
1631 | 376631d1 | Constantinos Venetsanopoulos | |
1632 | 376631d1 | Constantinos Venetsanopoulos | if filename in constants.ES_SCRIPTS: |
1633 | 376631d1 | Constantinos Venetsanopoulos | if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
|
1634 | 376631d1 | Constantinos Venetsanopoulos | return False, ("File '%s' under path '%s' is not executable" % |
1635 | 376631d1 | Constantinos Venetsanopoulos | (filename, es_dir)) |
1636 | 376631d1 | Constantinos Venetsanopoulos | |
1637 | 938adc87 | Constantinos Venetsanopoulos | parameters = [] |
1638 | 938adc87 | Constantinos Venetsanopoulos | if constants.ES_PARAMETERS_FILE in es_files: |
1639 | 938adc87 | Constantinos Venetsanopoulos | parameters_file = es_files[constants.ES_PARAMETERS_FILE] |
1640 | 938adc87 | Constantinos Venetsanopoulos | try:
|
1641 | 938adc87 | Constantinos Venetsanopoulos | parameters = utils.ReadFile(parameters_file).splitlines() |
1642 | 938adc87 | Constantinos Venetsanopoulos | except EnvironmentError, err: |
1643 | 938adc87 | Constantinos Venetsanopoulos | return False, ("Error while reading the EXT parameters file at %s: %s" % |
1644 | 938adc87 | Constantinos Venetsanopoulos | (parameters_file, utils.ErrnoOrStr(err))) |
1645 | 938adc87 | Constantinos Venetsanopoulos | parameters = [v.split(None, 1) for v in parameters] |
1646 | 938adc87 | Constantinos Venetsanopoulos | |
1647 | 376631d1 | Constantinos Venetsanopoulos | es_obj = \ |
1648 | 376631d1 | Constantinos Venetsanopoulos | objects.ExtStorage(name=name, path=es_dir, |
1649 | 376631d1 | Constantinos Venetsanopoulos | create_script=es_files[constants.ES_SCRIPT_CREATE], |
1650 | 376631d1 | Constantinos Venetsanopoulos | remove_script=es_files[constants.ES_SCRIPT_REMOVE], |
1651 | 376631d1 | Constantinos Venetsanopoulos | grow_script=es_files[constants.ES_SCRIPT_GROW], |
1652 | 376631d1 | Constantinos Venetsanopoulos | attach_script=es_files[constants.ES_SCRIPT_ATTACH], |
1653 | 376631d1 | Constantinos Venetsanopoulos | detach_script=es_files[constants.ES_SCRIPT_DETACH], |
1654 | 938adc87 | Constantinos Venetsanopoulos | setinfo_script=es_files[constants.ES_SCRIPT_SETINFO], |
1655 | 938adc87 | Constantinos Venetsanopoulos | verify_script=es_files[constants.ES_SCRIPT_VERIFY], |
1656 | 938adc87 | Constantinos Venetsanopoulos | supported_parameters=parameters) |
1657 | 376631d1 | Constantinos Venetsanopoulos | return True, es_obj |
1658 | 376631d1 | Constantinos Venetsanopoulos | |
1659 | 376631d1 | Constantinos Venetsanopoulos | |
1660 | 938adc87 | Constantinos Venetsanopoulos | def _ExtStorageEnvironment(unique_id, ext_params, |
1661 | 938adc87 | Constantinos Venetsanopoulos | size=None, grow=None, metadata=None): |
1662 | 376631d1 | Constantinos Venetsanopoulos | """Calculate the environment for an External Storage script.
|
1663 | 376631d1 | Constantinos Venetsanopoulos |
|
1664 | 376631d1 | Constantinos Venetsanopoulos | @type unique_id: tuple (driver, vol_name)
|
1665 | 376631d1 | Constantinos Venetsanopoulos | @param unique_id: ExtStorage pool and name of the Volume
|
1666 | 938adc87 | Constantinos Venetsanopoulos | @type ext_params: dict
|
1667 | 938adc87 | Constantinos Venetsanopoulos | @param ext_params: the EXT parameters
|
1668 | 376631d1 | Constantinos Venetsanopoulos | @type size: string
|
1669 | 376631d1 | Constantinos Venetsanopoulos | @param size: size of the Volume (in mebibytes)
|
1670 | 376631d1 | Constantinos Venetsanopoulos | @type grow: string
|
1671 | 376631d1 | Constantinos Venetsanopoulos | @param grow: new size of Volume after grow (in mebibytes)
|
1672 | 376631d1 | Constantinos Venetsanopoulos | @type metadata: string
|
1673 | 376631d1 | Constantinos Venetsanopoulos | @param metadata: metadata info of the Volume
|
1674 | 376631d1 | Constantinos Venetsanopoulos | @rtype: dict
|
1675 | 376631d1 | Constantinos Venetsanopoulos | @return: dict of environment variables
|
1676 | 376631d1 | Constantinos Venetsanopoulos |
|
1677 | 376631d1 | Constantinos Venetsanopoulos | """
|
1678 | 376631d1 | Constantinos Venetsanopoulos | vol_name = unique_id[1]
|
1679 | 376631d1 | Constantinos Venetsanopoulos | |
1680 | 376631d1 | Constantinos Venetsanopoulos | result = {} |
1681 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_NAME"] = vol_name
|
1682 | 376631d1 | Constantinos Venetsanopoulos | |
1683 | 938adc87 | Constantinos Venetsanopoulos | # EXT params
|
1684 | 938adc87 | Constantinos Venetsanopoulos | for pname, pvalue in ext_params.items(): |
1685 | 938adc87 | Constantinos Venetsanopoulos | result["EXTP_%s" % pname.upper()] = str(pvalue) |
1686 | 938adc87 | Constantinos Venetsanopoulos | |
1687 | 376631d1 | Constantinos Venetsanopoulos | if size is not None: |
1688 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_SIZE"] = size
|
1689 | 376631d1 | Constantinos Venetsanopoulos | |
1690 | 376631d1 | Constantinos Venetsanopoulos | if grow is not None: |
1691 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_NEW_SIZE"] = grow
|
1692 | 376631d1 | Constantinos Venetsanopoulos | |
1693 | 376631d1 | Constantinos Venetsanopoulos | if metadata is not None: |
1694 | 376631d1 | Constantinos Venetsanopoulos | result["VOL_METADATA"] = metadata
|
1695 | 376631d1 | Constantinos Venetsanopoulos | |
1696 | 376631d1 | Constantinos Venetsanopoulos | return result
|
1697 | 376631d1 | Constantinos Venetsanopoulos | |
1698 | 376631d1 | Constantinos Venetsanopoulos | |
1699 | 376631d1 | Constantinos Venetsanopoulos | def _VolumeLogName(kind, es_name, volume): |
1700 | 376631d1 | Constantinos Venetsanopoulos | """Compute the ExtStorage log filename for a given Volume and operation.
|
1701 | 376631d1 | Constantinos Venetsanopoulos |
|
1702 | 376631d1 | Constantinos Venetsanopoulos | @type kind: string
|
1703 | 376631d1 | Constantinos Venetsanopoulos | @param kind: the operation type (e.g. create, remove etc.)
|
1704 | 376631d1 | Constantinos Venetsanopoulos | @type es_name: string
|
1705 | 376631d1 | Constantinos Venetsanopoulos | @param es_name: the ExtStorage name
|
1706 | 376631d1 | Constantinos Venetsanopoulos | @type volume: string
|
1707 | 376631d1 | Constantinos Venetsanopoulos | @param volume: the name of the Volume inside the External Storage
|
1708 | 376631d1 | Constantinos Venetsanopoulos |
|
1709 | 376631d1 | Constantinos Venetsanopoulos | """
|
1710 | 376631d1 | Constantinos Venetsanopoulos | # Check if the extstorage log dir is a valid dir
|
1711 | 376631d1 | Constantinos Venetsanopoulos | if not os.path.isdir(pathutils.LOG_ES_DIR): |
1712 | 89ff748d | Thomas Thrainer | base.ThrowError("Cannot find log directory: %s", pathutils.LOG_ES_DIR)
|
1713 | 376631d1 | Constantinos Venetsanopoulos | |
1714 | 376631d1 | Constantinos Venetsanopoulos | # TODO: Use tempfile.mkstemp to create unique filename
|
1715 | 89ff748d | Thomas Thrainer | basename = ("%s-%s-%s-%s.log" %
|
1716 | 89ff748d | Thomas Thrainer | (kind, es_name, volume, utils.TimestampForFilename())) |
1717 | 89ff748d | Thomas Thrainer | return utils.PathJoin(pathutils.LOG_ES_DIR, basename)
|
1718 | 376631d1 | Constantinos Venetsanopoulos | |
1719 | 376631d1 | Constantinos Venetsanopoulos | |
1720 | a8083063 | Iustin Pop | DEV_MAP = { |
1721 | fe96220b | Iustin Pop | constants.LD_LV: LogicalVolume, |
1722 | 239364d0 | Thomas Thrainer | constants.LD_DRBD8: drbd.DRBD8Dev, |
1723 | b6135bbc | Apollon Oikonomopoulos | constants.LD_BLOCKDEV: PersistentBlockDevice, |
1724 | 7181fba0 | Constantinos Venetsanopoulos | constants.LD_RBD: RADOSBlockDevice, |
1725 | 376631d1 | Constantinos Venetsanopoulos | constants.LD_EXT: ExtStorageDevice, |
1726 | 1f7c8208 | Helga Velroyen | constants.LD_FILE: FileStorage, |
1727 | a8083063 | Iustin Pop | } |
1728 | a8083063 | Iustin Pop | |
1729 | a8083063 | Iustin Pop | |
1730 | 94dcbdb0 | Andrea Spadaccini | def _VerifyDiskType(dev_type): |
1731 | 94dcbdb0 | Andrea Spadaccini | if dev_type not in DEV_MAP: |
1732 | 94dcbdb0 | Andrea Spadaccini | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1733 | 94dcbdb0 | Andrea Spadaccini | |
1734 | 94dcbdb0 | Andrea Spadaccini | |
1735 | 5ff82cc9 | René Nussbaumer | def _VerifyDiskParams(disk): |
1736 | 5ff82cc9 | René Nussbaumer | """Verifies if all disk parameters are set.
|
1737 | 5ff82cc9 | René Nussbaumer |
|
1738 | 5ff82cc9 | René Nussbaumer | """
|
1739 | 5ff82cc9 | René Nussbaumer | missing = set(constants.DISK_LD_DEFAULTS[disk.dev_type]) - set(disk.params) |
1740 | 5ff82cc9 | René Nussbaumer | if missing:
|
1741 | 5ff82cc9 | René Nussbaumer | raise errors.ProgrammerError("Block device is missing disk parameters: %s" % |
1742 | 5ff82cc9 | René Nussbaumer | missing) |
1743 | 5ff82cc9 | René Nussbaumer | |
1744 | 5ff82cc9 | René Nussbaumer | |
1745 | 94dcbdb0 | Andrea Spadaccini | def FindDevice(disk, children): |
1746 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
1747 | a8083063 | Iustin Pop |
|
1748 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
1749 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
1750 | a8083063 | Iustin Pop |
|
1751 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
1752 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to find
|
1753 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
1754 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
1755 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
1756 | 94dcbdb0 | Andrea Spadaccini |
|
1757 | a8083063 | Iustin Pop | """
|
1758 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
1759 | 94dcbdb0 | Andrea Spadaccini | device = DEV_MAP[disk.dev_type](disk.physical_id, children, disk.size, |
1760 | c7c6606d | René Nussbaumer | disk.params) |
1761 | cb999543 | Iustin Pop | if not device.attached: |
1762 | a8083063 | Iustin Pop | return None |
1763 | ecb091e3 | Iustin Pop | return device
|
1764 | a8083063 | Iustin Pop | |
1765 | a8083063 | Iustin Pop | |
1766 | 94dcbdb0 | Andrea Spadaccini | def Assemble(disk, children): |
1767 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
1768 | a8083063 | Iustin Pop |
|
1769 | f96e3c4f | Iustin Pop | This will attach to assemble the device, as needed, to bring it
|
1770 | f96e3c4f | Iustin Pop | fully up. It must be safe to run on already-assembled devices.
|
1771 | a8083063 | Iustin Pop |
|
1772 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
1773 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to assemble
|
1774 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
1775 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
1776 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
1777 | 94dcbdb0 | Andrea Spadaccini |
|
1778 | a8083063 | Iustin Pop | """
|
1779 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
1780 | 5ff82cc9 | René Nussbaumer | _VerifyDiskParams(disk) |
1781 | 94dcbdb0 | Andrea Spadaccini | device = DEV_MAP[disk.dev_type](disk.physical_id, children, disk.size, |
1782 | c7c6606d | René Nussbaumer | disk.params) |
1783 | 1063abd1 | Iustin Pop | device.Assemble() |
1784 | a8083063 | Iustin Pop | return device
|
1785 | a8083063 | Iustin Pop | |
1786 | a8083063 | Iustin Pop | |
1787 | ee1478e5 | Bernardo Dal Seno | def Create(disk, children, excl_stor): |
1788 | a8083063 | Iustin Pop | """Create a device.
|
1789 | a8083063 | Iustin Pop |
|
1790 | 94dcbdb0 | Andrea Spadaccini | @type disk: L{objects.Disk}
|
1791 | 94dcbdb0 | Andrea Spadaccini | @param disk: the disk object to create
|
1792 | 94dcbdb0 | Andrea Spadaccini | @type children: list of L{bdev.BlockDev}
|
1793 | 94dcbdb0 | Andrea Spadaccini | @param children: the list of block devices that are children of the device
|
1794 | 94dcbdb0 | Andrea Spadaccini | represented by the disk parameter
|
1795 | ee1478e5 | Bernardo Dal Seno | @type excl_stor: boolean
|
1796 | ee1478e5 | Bernardo Dal Seno | @param excl_stor: Whether exclusive_storage is active
|
1797 | 5073fa0c | Bernardo Dal Seno | @rtype: L{bdev.BlockDev}
|
1798 | 5073fa0c | Bernardo Dal Seno | @return: the created device, or C{None} in case of an error
|
1799 | 94dcbdb0 | Andrea Spadaccini |
|
1800 | a8083063 | Iustin Pop | """
|
1801 | 94dcbdb0 | Andrea Spadaccini | _VerifyDiskType(disk.dev_type) |
1802 | 5ff82cc9 | René Nussbaumer | _VerifyDiskParams(disk) |
1803 | 94dcbdb0 | Andrea Spadaccini | device = DEV_MAP[disk.dev_type].Create(disk.physical_id, children, disk.size, |
1804 | 24c06acb | Bernardo Dal Seno | disk.spindles, disk.params, excl_stor) |
1805 | a8083063 | Iustin Pop | return device |