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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 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 time |
26 | a8083063 | Iustin Pop | import errno |
27 | a2cfdea2 | Iustin Pop | import pyparsing as pyp |
28 | 6f695a2e | Manuel Franceschini | import os |
29 | 468c5f77 | Iustin Pop | import logging |
30 | a8083063 | Iustin Pop | |
31 | a8083063 | Iustin Pop | from ganeti import utils |
32 | a8083063 | Iustin Pop | from ganeti import errors |
33 | fe96220b | Iustin Pop | from ganeti import constants |
34 | 96acbc09 | Michael Hanselmann | from ganeti import objects |
35 | a8083063 | Iustin Pop | |
36 | a8083063 | Iustin Pop | |
37 | 82463074 | Iustin Pop | def _IgnoreError(fn, *args, **kwargs): |
38 | 82463074 | Iustin Pop | """Executes the given function, ignoring BlockDeviceErrors.
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39 | 82463074 | Iustin Pop |
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40 | 82463074 | Iustin Pop | This is used in order to simplify the execution of cleanup or
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41 | 82463074 | Iustin Pop | rollback functions.
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42 | 82463074 | Iustin Pop |
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43 | 82463074 | Iustin Pop | @rtype: boolean
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44 | 82463074 | Iustin Pop | @return: True when fn didn't raise an exception, False otherwise
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45 | 82463074 | Iustin Pop |
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46 | 82463074 | Iustin Pop | """
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47 | 82463074 | Iustin Pop | try:
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48 | 82463074 | Iustin Pop | fn(*args, **kwargs) |
49 | 82463074 | Iustin Pop | return True |
50 | 82463074 | Iustin Pop | except errors.BlockDeviceError, err:
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51 | 099c52ad | Iustin Pop | logging.warning("Caught BlockDeviceError but ignoring: %s", str(err)) |
52 | 82463074 | Iustin Pop | return False |
53 | 82463074 | Iustin Pop | |
54 | 82463074 | Iustin Pop | |
55 | 82463074 | Iustin Pop | def _ThrowError(msg, *args): |
56 | 82463074 | Iustin Pop | """Log an error to the node daemon and the raise an exception.
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57 | 82463074 | Iustin Pop |
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58 | 82463074 | Iustin Pop | @type msg: string
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59 | 82463074 | Iustin Pop | @param msg: the text of the exception
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60 | 82463074 | Iustin Pop | @raise errors.BlockDeviceError
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61 | 82463074 | Iustin Pop |
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62 | 82463074 | Iustin Pop | """
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63 | 82463074 | Iustin Pop | if args:
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64 | 82463074 | Iustin Pop | msg = msg % args |
65 | 82463074 | Iustin Pop | logging.error(msg) |
66 | 82463074 | Iustin Pop | raise errors.BlockDeviceError(msg)
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67 | 82463074 | Iustin Pop | |
68 | 82463074 | Iustin Pop | |
69 | a8083063 | Iustin Pop | class BlockDev(object): |
70 | a8083063 | Iustin Pop | """Block device abstract class.
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71 | a8083063 | Iustin Pop |
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72 | a8083063 | Iustin Pop | A block device can be in the following states:
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73 | a8083063 | Iustin Pop | - not existing on the system, and by `Create()` it goes into:
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74 | a8083063 | Iustin Pop | - existing but not setup/not active, and by `Assemble()` goes into:
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75 | a8083063 | Iustin Pop | - active read-write and by `Open()` it goes into
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76 | a8083063 | Iustin Pop | - online (=used, or ready for use)
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77 | a8083063 | Iustin Pop |
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78 | a8083063 | Iustin Pop | A device can also be online but read-only, however we are not using
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79 | abdf0113 | Iustin Pop | the readonly state (LV has it, if needed in the future) and we are
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80 | abdf0113 | Iustin Pop | usually looking at this like at a stack, so it's easier to
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81 | abdf0113 | Iustin Pop | conceptualise the transition from not-existing to online and back
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82 | a8083063 | Iustin Pop | like a linear one.
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83 | a8083063 | Iustin Pop |
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84 | a8083063 | Iustin Pop | The many different states of the device are due to the fact that we
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85 | a8083063 | Iustin Pop | need to cover many device types:
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86 | a8083063 | Iustin Pop | - logical volumes are created, lvchange -a y $lv, and used
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87 | a8083063 | Iustin Pop | - drbd devices are attached to a local disk/remote peer and made primary
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88 | a8083063 | Iustin Pop |
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89 | a8083063 | Iustin Pop | A block device is identified by three items:
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90 | a8083063 | Iustin Pop | - the /dev path of the device (dynamic)
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91 | a8083063 | Iustin Pop | - a unique ID of the device (static)
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92 | a8083063 | Iustin Pop | - it's major/minor pair (dynamic)
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93 | a8083063 | Iustin Pop |
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94 | a8083063 | Iustin Pop | Not all devices implement both the first two as distinct items. LVM
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95 | a8083063 | Iustin Pop | logical volumes have their unique ID (the pair volume group, logical
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96 | abdf0113 | Iustin Pop | volume name) in a 1-to-1 relation to the dev path. For DRBD devices,
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97 | abdf0113 | Iustin Pop | the /dev path is again dynamic and the unique id is the pair (host1,
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98 | abdf0113 | Iustin Pop | dev1), (host2, dev2).
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99 | a8083063 | Iustin Pop |
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100 | a8083063 | Iustin Pop | You can get to a device in two ways:
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101 | a8083063 | Iustin Pop | - creating the (real) device, which returns you
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102 | abdf0113 | Iustin Pop | an attached instance (lvcreate)
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103 | a8083063 | Iustin Pop | - attaching of a python instance to an existing (real) device
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104 | a8083063 | Iustin Pop |
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105 | a8083063 | Iustin Pop | The second point, the attachement to a device, is different
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106 | a8083063 | Iustin Pop | depending on whether the device is assembled or not. At init() time,
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107 | a8083063 | Iustin Pop | we search for a device with the same unique_id as us. If found,
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108 | a8083063 | Iustin Pop | good. It also means that the device is already assembled. If not,
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109 | a8083063 | Iustin Pop | after assembly we'll have our correct major/minor.
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110 | a8083063 | Iustin Pop |
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111 | a8083063 | Iustin Pop | """
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112 | 464f8daf | Iustin Pop | def __init__(self, unique_id, children, size): |
113 | a8083063 | Iustin Pop | self._children = children
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114 | a8083063 | Iustin Pop | self.dev_path = None |
115 | a8083063 | Iustin Pop | self.unique_id = unique_id
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116 | a8083063 | Iustin Pop | self.major = None |
117 | a8083063 | Iustin Pop | self.minor = None |
118 | cb999543 | Iustin Pop | self.attached = False |
119 | 464f8daf | Iustin Pop | self.size = size
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120 | a8083063 | Iustin Pop | |
121 | a8083063 | Iustin Pop | def Assemble(self): |
122 | a8083063 | Iustin Pop | """Assemble the device from its components.
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123 | a8083063 | Iustin Pop |
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124 | f87548b5 | Iustin Pop | Implementations of this method by child classes must ensure that:
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125 | f87548b5 | Iustin Pop | - after the device has been assembled, it knows its major/minor
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126 | f87548b5 | Iustin Pop | numbers; this allows other devices (usually parents) to probe
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127 | f87548b5 | Iustin Pop | correctly for their children
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128 | f87548b5 | Iustin Pop | - calling this method on an existing, in-use device is safe
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129 | f87548b5 | Iustin Pop | - if the device is already configured (and in an OK state),
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130 | f87548b5 | Iustin Pop | this method is idempotent
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131 | a8083063 | Iustin Pop |
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132 | a8083063 | Iustin Pop | """
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133 | 1063abd1 | Iustin Pop | pass
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134 | a8083063 | Iustin Pop | |
135 | a8083063 | Iustin Pop | def Attach(self): |
136 | a8083063 | Iustin Pop | """Find a device which matches our config and attach to it.
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137 | a8083063 | Iustin Pop |
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138 | a8083063 | Iustin Pop | """
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139 | a8083063 | Iustin Pop | raise NotImplementedError |
140 | a8083063 | Iustin Pop | |
141 | a8083063 | Iustin Pop | def Close(self): |
142 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
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143 | a8083063 | Iustin Pop |
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144 | a8083063 | Iustin Pop | """
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145 | a8083063 | Iustin Pop | raise NotImplementedError |
146 | a8083063 | Iustin Pop | |
147 | a8083063 | Iustin Pop | @classmethod
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148 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
149 | a8083063 | Iustin Pop | """Create the device.
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150 | a8083063 | Iustin Pop |
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151 | a8083063 | Iustin Pop | If the device cannot be created, it will return None
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152 | a8083063 | Iustin Pop | instead. Error messages go to the logging system.
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153 | a8083063 | Iustin Pop |
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154 | a8083063 | Iustin Pop | Note that for some devices, the unique_id is used, and for other,
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155 | a8083063 | Iustin Pop | the children. The idea is that these two, taken together, are
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156 | a8083063 | Iustin Pop | enough for both creation and assembly (later).
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157 | a8083063 | Iustin Pop |
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158 | a8083063 | Iustin Pop | """
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159 | a8083063 | Iustin Pop | raise NotImplementedError |
160 | a8083063 | Iustin Pop | |
161 | a8083063 | Iustin Pop | def Remove(self): |
162 | a8083063 | Iustin Pop | """Remove this device.
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163 | a8083063 | Iustin Pop |
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164 | abdf0113 | Iustin Pop | This makes sense only for some of the device types: LV and file
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165 | 5bbd3f7f | Michael Hanselmann | storage. Also note that if the device can't attach, the removal
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166 | abdf0113 | Iustin Pop | can't be completed.
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167 | a8083063 | Iustin Pop |
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168 | a8083063 | Iustin Pop | """
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169 | a8083063 | Iustin Pop | raise NotImplementedError |
170 | a8083063 | Iustin Pop | |
171 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
172 | f3e513ad | Iustin Pop | """Rename this device.
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173 | f3e513ad | Iustin Pop |
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174 | f3e513ad | Iustin Pop | This may or may not make sense for a given device type.
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175 | f3e513ad | Iustin Pop |
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176 | f3e513ad | Iustin Pop | """
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177 | f3e513ad | Iustin Pop | raise NotImplementedError |
178 | f3e513ad | Iustin Pop | |
179 | a8083063 | Iustin Pop | def Open(self, force=False): |
180 | a8083063 | Iustin Pop | """Make the device ready for use.
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181 | a8083063 | Iustin Pop |
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182 | a8083063 | Iustin Pop | This makes the device ready for I/O. For now, just the DRBD
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183 | a8083063 | Iustin Pop | devices need this.
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184 | a8083063 | Iustin Pop |
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185 | a8083063 | Iustin Pop | The force parameter signifies that if the device has any kind of
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186 | a8083063 | Iustin Pop | --force thing, it should be used, we know what we are doing.
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187 | a8083063 | Iustin Pop |
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188 | a8083063 | Iustin Pop | """
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189 | a8083063 | Iustin Pop | raise NotImplementedError |
190 | a8083063 | Iustin Pop | |
191 | a8083063 | Iustin Pop | def Shutdown(self): |
192 | a8083063 | Iustin Pop | """Shut down the device, freeing its children.
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193 | a8083063 | Iustin Pop |
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194 | a8083063 | Iustin Pop | This undoes the `Assemble()` work, except for the child
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195 | a8083063 | Iustin Pop | assembling; as such, the children on the device are still
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196 | a8083063 | Iustin Pop | assembled after this call.
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197 | a8083063 | Iustin Pop |
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198 | a8083063 | Iustin Pop | """
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199 | a8083063 | Iustin Pop | raise NotImplementedError |
200 | a8083063 | Iustin Pop | |
201 | a8083063 | Iustin Pop | def SetSyncSpeed(self, speed): |
202 | a8083063 | Iustin Pop | """Adjust the sync speed of the mirror.
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203 | a8083063 | Iustin Pop |
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204 | a8083063 | Iustin Pop | In case this is not a mirroring device, this is no-op.
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205 | a8083063 | Iustin Pop |
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206 | a8083063 | Iustin Pop | """
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207 | a8083063 | Iustin Pop | result = True
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208 | a8083063 | Iustin Pop | if self._children: |
209 | a8083063 | Iustin Pop | for child in self._children: |
210 | a8083063 | Iustin Pop | result = result and child.SetSyncSpeed(speed)
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211 | a8083063 | Iustin Pop | return result
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212 | a8083063 | Iustin Pop | |
213 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
214 | a8083063 | Iustin Pop | """Returns the sync status of the device.
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215 | a8083063 | Iustin Pop |
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216 | a8083063 | Iustin Pop | If this device is a mirroring device, this function returns the
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217 | a8083063 | Iustin Pop | status of the mirror.
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218 | a8083063 | Iustin Pop |
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219 | 0834c866 | Iustin Pop | If sync_percent is None, it means the device is not syncing.
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220 | a8083063 | Iustin Pop |
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221 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't estimate
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222 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
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223 | 0834c866 | Iustin Pop |
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224 | a8083063 | Iustin Pop | If is_degraded is True, it means the device is missing
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225 | a8083063 | Iustin Pop | redundancy. This is usually a sign that something went wrong in
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226 | a8083063 | Iustin Pop | the device setup, if sync_percent is None.
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227 | a8083063 | Iustin Pop |
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228 | 0834c866 | Iustin Pop | The ldisk parameter represents the degradation of the local
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229 | 0834c866 | Iustin Pop | data. This is only valid for some devices, the rest will always
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230 | 0834c866 | Iustin Pop | return False (not degraded).
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231 | 0834c866 | Iustin Pop |
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232 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
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233 | c41eea6e | Iustin Pop |
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234 | a8083063 | Iustin Pop | """
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235 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
236 | 96acbc09 | Michael Hanselmann | major=self.major,
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237 | 96acbc09 | Michael Hanselmann | minor=self.minor,
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238 | 96acbc09 | Michael Hanselmann | sync_percent=None,
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239 | 96acbc09 | Michael Hanselmann | estimated_time=None,
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240 | 96acbc09 | Michael Hanselmann | is_degraded=False,
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241 | f208978a | Michael Hanselmann | ldisk_status=constants.LDS_OKAY) |
242 | a8083063 | Iustin Pop | |
243 | a8083063 | Iustin Pop | def CombinedSyncStatus(self): |
244 | a8083063 | Iustin Pop | """Calculate the mirror status recursively for our children.
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245 | a8083063 | Iustin Pop |
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246 | a8083063 | Iustin Pop | The return value is the same as for `GetSyncStatus()` except the
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247 | a8083063 | Iustin Pop | minimum percent and maximum time are calculated across our
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248 | a8083063 | Iustin Pop | children.
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249 | a8083063 | Iustin Pop |
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250 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
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251 | 96acbc09 | Michael Hanselmann |
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252 | a8083063 | Iustin Pop | """
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253 | 96acbc09 | Michael Hanselmann | status = self.GetSyncStatus()
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254 | 96acbc09 | Michael Hanselmann | |
255 | 96acbc09 | Michael Hanselmann | min_percent = status.sync_percent |
256 | 96acbc09 | Michael Hanselmann | max_time = status.estimated_time |
257 | 96acbc09 | Michael Hanselmann | is_degraded = status.is_degraded |
258 | f208978a | Michael Hanselmann | ldisk_status = status.ldisk_status |
259 | 96acbc09 | Michael Hanselmann | |
260 | a8083063 | Iustin Pop | if self._children: |
261 | a8083063 | Iustin Pop | for child in self._children: |
262 | 96acbc09 | Michael Hanselmann | child_status = child.GetSyncStatus() |
263 | 96acbc09 | Michael Hanselmann | |
264 | a8083063 | Iustin Pop | if min_percent is None: |
265 | 96acbc09 | Michael Hanselmann | min_percent = child_status.sync_percent |
266 | 96acbc09 | Michael Hanselmann | elif child_status.sync_percent is not None: |
267 | 96acbc09 | Michael Hanselmann | min_percent = min(min_percent, child_status.sync_percent)
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268 | 96acbc09 | Michael Hanselmann | |
269 | a8083063 | Iustin Pop | if max_time is None: |
270 | 96acbc09 | Michael Hanselmann | max_time = child_status.estimated_time |
271 | 96acbc09 | Michael Hanselmann | elif child_status.estimated_time is not None: |
272 | 96acbc09 | Michael Hanselmann | max_time = max(max_time, child_status.estimated_time)
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273 | 96acbc09 | Michael Hanselmann | |
274 | 96acbc09 | Michael Hanselmann | is_degraded = is_degraded or child_status.is_degraded
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275 | f208978a | Michael Hanselmann | |
276 | f208978a | Michael Hanselmann | if ldisk_status is None: |
277 | f208978a | Michael Hanselmann | ldisk_status = child_status.ldisk_status |
278 | f208978a | Michael Hanselmann | elif child_status.ldisk_status is not None: |
279 | f208978a | Michael Hanselmann | ldisk_status = max(ldisk_status, child_status.ldisk_status)
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280 | 96acbc09 | Michael Hanselmann | |
281 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
282 | 96acbc09 | Michael Hanselmann | major=self.major,
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283 | 96acbc09 | Michael Hanselmann | minor=self.minor,
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284 | 96acbc09 | Michael Hanselmann | sync_percent=min_percent, |
285 | 96acbc09 | Michael Hanselmann | estimated_time=max_time, |
286 | 96acbc09 | Michael Hanselmann | is_degraded=is_degraded, |
287 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
288 | a8083063 | Iustin Pop | |
289 | a8083063 | Iustin Pop | |
290 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
291 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
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292 | a0c3fea1 | Michael Hanselmann |
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293 | a0c3fea1 | Michael Hanselmann | Only supported for some device types.
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294 | a0c3fea1 | Michael Hanselmann |
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295 | a0c3fea1 | Michael Hanselmann | """
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296 | a0c3fea1 | Michael Hanselmann | for child in self._children: |
297 | a0c3fea1 | Michael Hanselmann | child.SetInfo(text) |
298 | a0c3fea1 | Michael Hanselmann | |
299 | 1005d816 | Iustin Pop | def Grow(self, amount): |
300 | 1005d816 | Iustin Pop | """Grow the block device.
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301 | 1005d816 | Iustin Pop |
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302 | c41eea6e | Iustin Pop | @param amount: the amount (in mebibytes) to grow with
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303 | 1005d816 | Iustin Pop |
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304 | 1005d816 | Iustin Pop | """
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305 | 1005d816 | Iustin Pop | raise NotImplementedError |
306 | a0c3fea1 | Michael Hanselmann | |
307 | fcff3897 | Iustin Pop | def GetActualSize(self): |
308 | fcff3897 | Iustin Pop | """Return the actual disk size.
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309 | fcff3897 | Iustin Pop |
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310 | fcff3897 | Iustin Pop | @note: the device needs to be active when this is called
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311 | fcff3897 | Iustin Pop |
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312 | fcff3897 | Iustin Pop | """
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313 | fcff3897 | Iustin Pop | assert self.attached, "BlockDevice not attached in GetActualSize()" |
314 | fcff3897 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize64", self.dev_path]) |
315 | fcff3897 | Iustin Pop | if result.failed:
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316 | fcff3897 | Iustin Pop | _ThrowError("blockdev failed (%s): %s",
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317 | fcff3897 | Iustin Pop | result.fail_reason, result.output) |
318 | fcff3897 | Iustin Pop | try:
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319 | fcff3897 | Iustin Pop | sz = int(result.output.strip())
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320 | fcff3897 | Iustin Pop | except (ValueError, TypeError), err: |
321 | fcff3897 | Iustin Pop | _ThrowError("Failed to parse blockdev output: %s", str(err)) |
322 | fcff3897 | Iustin Pop | return sz
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323 | fcff3897 | Iustin Pop | |
324 | a8083063 | Iustin Pop | def __repr__(self): |
325 | a8083063 | Iustin Pop | return ("<%s: unique_id: %s, children: %s, %s:%s, %s>" % |
326 | a8083063 | Iustin Pop | (self.__class__, self.unique_id, self._children, |
327 | a8083063 | Iustin Pop | self.major, self.minor, self.dev_path)) |
328 | a8083063 | Iustin Pop | |
329 | a8083063 | Iustin Pop | |
330 | a8083063 | Iustin Pop | class LogicalVolume(BlockDev): |
331 | a8083063 | Iustin Pop | """Logical Volume block device.
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332 | a8083063 | Iustin Pop |
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333 | a8083063 | Iustin Pop | """
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334 | 464f8daf | Iustin Pop | def __init__(self, unique_id, children, size): |
335 | a8083063 | Iustin Pop | """Attaches to a LV device.
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336 | a8083063 | Iustin Pop |
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337 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
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338 | a8083063 | Iustin Pop |
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339 | a8083063 | Iustin Pop | """
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340 | 464f8daf | Iustin Pop | super(LogicalVolume, self).__init__(unique_id, children, size) |
341 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
342 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
343 | a8083063 | Iustin Pop | self._vg_name, self._lv_name = unique_id |
344 | a8083063 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
345 | 99e8295c | Iustin Pop | self._degraded = True |
346 | 38256320 | Iustin Pop | self.major = self.minor = self.pe_size = self.stripe_count = None |
347 | a8083063 | Iustin Pop | self.Attach()
|
348 | a8083063 | Iustin Pop | |
349 | a8083063 | Iustin Pop | @classmethod
|
350 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
351 | a8083063 | Iustin Pop | """Create a new logical volume.
|
352 | a8083063 | Iustin Pop |
|
353 | a8083063 | Iustin Pop | """
|
354 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
355 | 6c626518 | Iustin Pop | raise errors.ProgrammerError("Invalid configuration data %s" % |
356 | 6c626518 | Iustin Pop | str(unique_id))
|
357 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
358 | 2070598f | Iustin Pop | pvs_info = cls.GetPVInfo([vg_name]) |
359 | a8083063 | Iustin Pop | if not pvs_info: |
360 | 82463074 | Iustin Pop | _ThrowError("Can't compute PV info for vg %s", vg_name)
|
361 | a8083063 | Iustin Pop | pvs_info.sort() |
362 | a8083063 | Iustin Pop | pvs_info.reverse() |
363 | 5b7b5d49 | Guido Trotter | |
364 | 5b7b5d49 | Guido Trotter | pvlist = [ pv[1] for pv in pvs_info ] |
365 | 96c7a5b0 | Iustin Pop | if utils.any(pvlist, lambda v: ":" in v): |
366 | 96c7a5b0 | Iustin Pop | _ThrowError("Some of your PVs have invalid character ':'"
|
367 | 96c7a5b0 | Iustin Pop | " in their name")
|
368 | 5b7b5d49 | Guido Trotter | free_size = sum([ pv[0] for pv in pvs_info ]) |
369 | fecbe9d5 | Iustin Pop | current_pvs = len(pvlist)
|
370 | fecbe9d5 | Iustin Pop | stripes = min(current_pvs, constants.LVM_STRIPECOUNT)
|
371 | 5b7b5d49 | Guido Trotter | |
372 | 5b7b5d49 | Guido Trotter | # The size constraint should have been checked from the master before
|
373 | 5b7b5d49 | Guido Trotter | # calling the create function.
|
374 | a8083063 | Iustin Pop | if free_size < size:
|
375 | 82463074 | Iustin Pop | _ThrowError("Not enough free space: required %s,"
|
376 | 82463074 | Iustin Pop | " available %s", size, free_size)
|
377 | fecbe9d5 | Iustin Pop | cmd = ["lvcreate", "-L%dm" % size, "-n%s" % lv_name] |
378 | fecbe9d5 | Iustin Pop | # If the free space is not well distributed, we won't be able to
|
379 | fecbe9d5 | Iustin Pop | # create an optimally-striped volume; in that case, we want to try
|
380 | fecbe9d5 | Iustin Pop | # with N, N-1, ..., 2, and finally 1 (non-stripped) number of
|
381 | fecbe9d5 | Iustin Pop | # stripes
|
382 | fecbe9d5 | Iustin Pop | for stripes_arg in range(stripes, 0, -1): |
383 | fecbe9d5 | Iustin Pop | result = utils.RunCmd(cmd + ["-i%d" % stripes_arg] + [vg_name] + pvlist)
|
384 | fecbe9d5 | Iustin Pop | if not result.failed: |
385 | fecbe9d5 | Iustin Pop | break
|
386 | a8083063 | Iustin Pop | if result.failed:
|
387 | 82463074 | Iustin Pop | _ThrowError("LV create failed (%s): %s",
|
388 | 82463074 | Iustin Pop | result.fail_reason, result.output) |
389 | 464f8daf | Iustin Pop | return LogicalVolume(unique_id, children, size)
|
390 | a8083063 | Iustin Pop | |
391 | a8083063 | Iustin Pop | @staticmethod
|
392 | 2070598f | Iustin Pop | def GetPVInfo(vg_names, filter_allocatable=True): |
393 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
|
394 | a8083063 | Iustin Pop |
|
395 | 2070598f | Iustin Pop | @param vg_names: list of volume group names, if empty all will be returned
|
396 | 2070598f | Iustin Pop | @param filter_allocatable: whether to skip over unallocatable PVs
|
397 | a8083063 | Iustin Pop |
|
398 | c41eea6e | Iustin Pop | @rtype: list
|
399 | c41eea6e | Iustin Pop | @return: list of tuples (free_space, name) with free_space in mebibytes
|
400 | 098c0958 | Michael Hanselmann |
|
401 | a8083063 | Iustin Pop | """
|
402 | 96c7a5b0 | Iustin Pop | sep = "|"
|
403 | a8083063 | Iustin Pop | command = ["pvs", "--noheadings", "--nosuffix", "--units=m", |
404 | a8083063 | Iustin Pop | "-opv_name,vg_name,pv_free,pv_attr", "--unbuffered", |
405 | 96c7a5b0 | Iustin Pop | "--separator=%s" % sep ]
|
406 | a8083063 | Iustin Pop | result = utils.RunCmd(command) |
407 | a8083063 | Iustin Pop | if result.failed:
|
408 | 468c5f77 | Iustin Pop | logging.error("Can't get the PV information: %s - %s",
|
409 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
410 | a8083063 | Iustin Pop | return None |
411 | a8083063 | Iustin Pop | data = [] |
412 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
413 | 96c7a5b0 | Iustin Pop | fields = line.strip().split(sep) |
414 | a8083063 | Iustin Pop | if len(fields) != 4: |
415 | 468c5f77 | Iustin Pop | logging.error("Can't parse pvs output: line '%s'", line)
|
416 | a8083063 | Iustin Pop | return None |
417 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not allocatable
|
418 | 2070598f | Iustin Pop | if filter_allocatable and fields[3][0] != 'a': |
419 | a8083063 | Iustin Pop | continue
|
420 | 2070598f | Iustin Pop | # (possibly) skip over pvs which are not in the right volume group(s)
|
421 | 2070598f | Iustin Pop | if vg_names and fields[1] not in vg_names: |
422 | 2070598f | Iustin Pop | continue
|
423 | 2070598f | Iustin Pop | data.append((float(fields[2]), fields[0], fields[1])) |
424 | a8083063 | Iustin Pop | |
425 | a8083063 | Iustin Pop | return data
|
426 | a8083063 | Iustin Pop | |
427 | a8083063 | Iustin Pop | def Remove(self): |
428 | a8083063 | Iustin Pop | """Remove this logical volume.
|
429 | a8083063 | Iustin Pop |
|
430 | a8083063 | Iustin Pop | """
|
431 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
432 | a8083063 | Iustin Pop | # the LV does not exist
|
433 | 0c6c04ec | Iustin Pop | return
|
434 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
435 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
436 | a8083063 | Iustin Pop | if result.failed:
|
437 | 0c6c04ec | Iustin Pop | _ThrowError("Can't lvremove: %s - %s", result.fail_reason, result.output)
|
438 | a8083063 | Iustin Pop | |
439 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
440 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
441 | f3e513ad | Iustin Pop |
|
442 | f3e513ad | Iustin Pop | """
|
443 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
444 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
445 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
446 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
447 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
448 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
449 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
450 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
451 | f3e513ad | Iustin Pop | if result.failed:
|
452 | 82463074 | Iustin Pop | _ThrowError("Failed to rename the logical volume: %s", result.output)
|
453 | be345db0 | Iustin Pop | self._lv_name = new_name
|
454 | be345db0 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
455 | be345db0 | Iustin Pop | |
456 | a8083063 | Iustin Pop | def Attach(self): |
457 | a8083063 | Iustin Pop | """Attach to an existing LV.
|
458 | a8083063 | Iustin Pop |
|
459 | a8083063 | Iustin Pop | This method will try to see if an existing and active LV exists
|
460 | c99a3cc0 | Manuel Franceschini | which matches our name. If so, its major/minor will be
|
461 | a8083063 | Iustin Pop | recorded.
|
462 | a8083063 | Iustin Pop |
|
463 | a8083063 | Iustin Pop | """
|
464 | cb999543 | Iustin Pop | self.attached = False |
465 | 99e8295c | Iustin Pop | result = utils.RunCmd(["lvs", "--noheadings", "--separator=,", |
466 | 38256320 | Iustin Pop | "--units=m", "--nosuffix", |
467 | 38256320 | Iustin Pop | "-olv_attr,lv_kernel_major,lv_kernel_minor,"
|
468 | 38256320 | Iustin Pop | "vg_extent_size,stripes", self.dev_path]) |
469 | a8083063 | Iustin Pop | if result.failed:
|
470 | 468c5f77 | Iustin Pop | logging.error("Can't find LV %s: %s, %s",
|
471 | 468c5f77 | Iustin Pop | self.dev_path, result.fail_reason, result.output)
|
472 | a8083063 | Iustin Pop | return False |
473 | 38256320 | Iustin Pop | # the output can (and will) have multiple lines for multi-segment
|
474 | 38256320 | Iustin Pop | # LVs, as the 'stripes' parameter is a segment one, so we take
|
475 | 38256320 | Iustin Pop | # only the last entry, which is the one we're interested in; note
|
476 | 38256320 | Iustin Pop | # that with LVM2 anyway the 'stripes' value must be constant
|
477 | 38256320 | Iustin Pop | # across segments, so this is a no-op actually
|
478 | 38256320 | Iustin Pop | out = result.stdout.splitlines() |
479 | 38256320 | Iustin Pop | if not out: # totally empty result? splitlines() returns at least |
480 | 38256320 | Iustin Pop | # one line for any non-empty string
|
481 | 38256320 | Iustin Pop | logging.error("Can't parse LVS output, no lines? Got '%s'", str(out)) |
482 | 38256320 | Iustin Pop | return False |
483 | 38256320 | Iustin Pop | out = out[-1].strip().rstrip(',') |
484 | 99e8295c | Iustin Pop | out = out.split(",")
|
485 | 38256320 | Iustin Pop | if len(out) != 5: |
486 | 38256320 | Iustin Pop | logging.error("Can't parse LVS output, len(%s) != 5", str(out)) |
487 | 99e8295c | Iustin Pop | return False |
488 | 99e8295c | Iustin Pop | |
489 | 38256320 | Iustin Pop | status, major, minor, pe_size, stripes = out |
490 | 99e8295c | Iustin Pop | if len(status) != 6: |
491 | 468c5f77 | Iustin Pop | logging.error("lvs lv_attr is not 6 characters (%s)", status)
|
492 | 99e8295c | Iustin Pop | return False |
493 | 99e8295c | Iustin Pop | |
494 | 99e8295c | Iustin Pop | try:
|
495 | 99e8295c | Iustin Pop | major = int(major)
|
496 | 99e8295c | Iustin Pop | minor = int(minor)
|
497 | 99e8295c | Iustin Pop | except ValueError, err: |
498 | 468c5f77 | Iustin Pop | logging.error("lvs major/minor cannot be parsed: %s", str(err)) |
499 | 99e8295c | Iustin Pop | |
500 | 38256320 | Iustin Pop | try:
|
501 | 38256320 | Iustin Pop | pe_size = int(float(pe_size)) |
502 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
503 | 38256320 | Iustin Pop | logging.error("Can't parse vg extent size: %s", err)
|
504 | 38256320 | Iustin Pop | return False |
505 | 38256320 | Iustin Pop | |
506 | 38256320 | Iustin Pop | try:
|
507 | 38256320 | Iustin Pop | stripes = int(stripes)
|
508 | 38256320 | Iustin Pop | except (TypeError, ValueError), err: |
509 | 38256320 | Iustin Pop | logging.error("Can't parse the number of stripes: %s", err)
|
510 | 38256320 | Iustin Pop | return False |
511 | 38256320 | Iustin Pop | |
512 | 99e8295c | Iustin Pop | self.major = major
|
513 | 99e8295c | Iustin Pop | self.minor = minor
|
514 | 38256320 | Iustin Pop | self.pe_size = pe_size
|
515 | 38256320 | Iustin Pop | self.stripe_count = stripes
|
516 | 99e8295c | Iustin Pop | self._degraded = status[0] == 'v' # virtual volume, i.e. doesn't backing |
517 | 99e8295c | Iustin Pop | # storage
|
518 | cb999543 | Iustin Pop | self.attached = True |
519 | 99e8295c | Iustin Pop | return True |
520 | a8083063 | Iustin Pop | |
521 | a8083063 | Iustin Pop | def Assemble(self): |
522 | a8083063 | Iustin Pop | """Assemble the device.
|
523 | a8083063 | Iustin Pop |
|
524 | 5bbd3f7f | Michael Hanselmann | We always run `lvchange -ay` on the LV to ensure it's active before
|
525 | 5574047a | Iustin Pop | use, as there were cases when xenvg was not active after boot
|
526 | 5574047a | Iustin Pop | (also possibly after disk issues).
|
527 | a8083063 | Iustin Pop |
|
528 | a8083063 | Iustin Pop | """
|
529 | 5574047a | Iustin Pop | result = utils.RunCmd(["lvchange", "-ay", self.dev_path]) |
530 | 5574047a | Iustin Pop | if result.failed:
|
531 | 1063abd1 | Iustin Pop | _ThrowError("Can't activate lv %s: %s", self.dev_path, result.output) |
532 | a8083063 | Iustin Pop | |
533 | a8083063 | Iustin Pop | def Shutdown(self): |
534 | a8083063 | Iustin Pop | """Shutdown the device.
|
535 | a8083063 | Iustin Pop |
|
536 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
537 | a8083063 | Iustin Pop | volumes on shutdown.
|
538 | a8083063 | Iustin Pop |
|
539 | a8083063 | Iustin Pop | """
|
540 | 746f7476 | Iustin Pop | pass
|
541 | a8083063 | Iustin Pop | |
542 | 9db6dbce | Iustin Pop | def GetSyncStatus(self): |
543 | 9db6dbce | Iustin Pop | """Returns the sync status of the device.
|
544 | 9db6dbce | Iustin Pop |
|
545 | 9db6dbce | Iustin Pop | If this device is a mirroring device, this function returns the
|
546 | 9db6dbce | Iustin Pop | status of the mirror.
|
547 | 9db6dbce | Iustin Pop |
|
548 | 9db6dbce | Iustin Pop | For logical volumes, sync_percent and estimated_time are always
|
549 | 9db6dbce | Iustin Pop | None (no recovery in progress, as we don't handle the mirrored LV
|
550 | 0834c866 | Iustin Pop | case). The is_degraded parameter is the inverse of the ldisk
|
551 | 0834c866 | Iustin Pop | parameter.
|
552 | 9db6dbce | Iustin Pop |
|
553 | 0834c866 | Iustin Pop | For the ldisk parameter, we check if the logical volume has the
|
554 | 0834c866 | Iustin Pop | 'virtual' type, which means it's not backed by existing storage
|
555 | 0834c866 | Iustin Pop | anymore (read from it return I/O error). This happens after a
|
556 | 0834c866 | Iustin Pop | physical disk failure and subsequent 'vgreduce --removemissing' on
|
557 | 0834c866 | Iustin Pop | the volume group.
|
558 | 9db6dbce | Iustin Pop |
|
559 | 99e8295c | Iustin Pop | The status was already read in Attach, so we just return it.
|
560 | 99e8295c | Iustin Pop |
|
561 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
562 | c41eea6e | Iustin Pop |
|
563 | 9db6dbce | Iustin Pop | """
|
564 | f208978a | Michael Hanselmann | if self._degraded: |
565 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_FAULTY |
566 | f208978a | Michael Hanselmann | else:
|
567 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_OKAY |
568 | f208978a | Michael Hanselmann | |
569 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
570 | 96acbc09 | Michael Hanselmann | major=self.major,
|
571 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
572 | 96acbc09 | Michael Hanselmann | sync_percent=None,
|
573 | 96acbc09 | Michael Hanselmann | estimated_time=None,
|
574 | 96acbc09 | Michael Hanselmann | is_degraded=self._degraded,
|
575 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
576 | 9db6dbce | Iustin Pop | |
577 | a8083063 | Iustin Pop | def Open(self, force=False): |
578 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
579 | a8083063 | Iustin Pop |
|
580 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
581 | a8083063 | Iustin Pop |
|
582 | a8083063 | Iustin Pop | """
|
583 | fdbd668d | Iustin Pop | pass
|
584 | a8083063 | Iustin Pop | |
585 | a8083063 | Iustin Pop | def Close(self): |
586 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
587 | a8083063 | Iustin Pop |
|
588 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
589 | a8083063 | Iustin Pop |
|
590 | a8083063 | Iustin Pop | """
|
591 | fdbd668d | Iustin Pop | pass
|
592 | a8083063 | Iustin Pop | |
593 | a8083063 | Iustin Pop | def Snapshot(self, size): |
594 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
595 | a8083063 | 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 | 464f8daf | Iustin Pop | snap = LogicalVolume((self._vg_name, snap_name), None, size) |
601 | 0c6c04ec | Iustin Pop | _IgnoreError(snap.Remove) |
602 | a8083063 | Iustin Pop | |
603 | 2070598f | Iustin Pop | pvs_info = self.GetPVInfo([self._vg_name]) |
604 | a8083063 | Iustin Pop | if not pvs_info: |
605 | 82463074 | Iustin Pop | _ThrowError("Can't compute PV info for vg %s", self._vg_name) |
606 | a8083063 | Iustin Pop | pvs_info.sort() |
607 | a8083063 | Iustin Pop | pvs_info.reverse() |
608 | 2070598f | Iustin Pop | free_size, pv_name, _ = pvs_info[0]
|
609 | a8083063 | Iustin Pop | if free_size < size:
|
610 | 82463074 | Iustin Pop | _ThrowError("Not enough free space: required %s,"
|
611 | 82463074 | Iustin Pop | " available %s", size, free_size)
|
612 | a8083063 | Iustin Pop | |
613 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
614 | a8083063 | Iustin Pop | "-n%s" % snap_name, self.dev_path]) |
615 | a8083063 | Iustin Pop | if result.failed:
|
616 | 82463074 | Iustin Pop | _ThrowError("command: %s error: %s - %s",
|
617 | 82463074 | Iustin Pop | result.cmd, result.fail_reason, result.output) |
618 | a8083063 | Iustin Pop | |
619 | a8083063 | Iustin Pop | return snap_name
|
620 | a8083063 | Iustin Pop | |
621 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
622 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
623 | a0c3fea1 | Michael Hanselmann |
|
624 | a0c3fea1 | Michael Hanselmann | """
|
625 | a0c3fea1 | Michael Hanselmann | BlockDev.SetInfo(self, text)
|
626 | a0c3fea1 | Michael Hanselmann | |
627 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
628 | a0c3fea1 | Michael Hanselmann | text = re.sub('^[^A-Za-z0-9_+.]', '_', text) |
629 | a0c3fea1 | Michael Hanselmann | text = re.sub('[^-A-Za-z0-9_+.]', '_', text) |
630 | a0c3fea1 | Michael Hanselmann | |
631 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
632 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
633 | a0c3fea1 | Michael Hanselmann | |
634 | a0c3fea1 | Michael Hanselmann | result = utils.RunCmd(["lvchange", "--addtag", text, |
635 | a0c3fea1 | Michael Hanselmann | self.dev_path])
|
636 | a0c3fea1 | Michael Hanselmann | if result.failed:
|
637 | 82463074 | Iustin Pop | _ThrowError("Command: %s error: %s - %s", result.cmd, result.fail_reason,
|
638 | 82463074 | Iustin Pop | result.output) |
639 | 82463074 | Iustin Pop | |
640 | 1005d816 | Iustin Pop | def Grow(self, amount): |
641 | 1005d816 | Iustin Pop | """Grow the logical volume.
|
642 | 1005d816 | Iustin Pop |
|
643 | 1005d816 | Iustin Pop | """
|
644 | 38256320 | Iustin Pop | if self.pe_size is None or self.stripe_count is None: |
645 | 38256320 | Iustin Pop | if not self.Attach(): |
646 | 38256320 | Iustin Pop | _ThrowError("Can't attach to LV during Grow()")
|
647 | 38256320 | Iustin Pop | full_stripe_size = self.pe_size * self.stripe_count |
648 | 38256320 | Iustin Pop | rest = amount % full_stripe_size |
649 | 38256320 | Iustin Pop | if rest != 0: |
650 | 38256320 | Iustin Pop | amount += full_stripe_size - rest |
651 | 1005d816 | Iustin Pop | # we try multiple algorithms since the 'best' ones might not have
|
652 | 1005d816 | Iustin Pop | # space available in the right place, but later ones might (since
|
653 | 1005d816 | Iustin Pop | # they have less constraints); also note that only recent LVM
|
654 | 1005d816 | Iustin Pop | # supports 'cling'
|
655 | 1005d816 | Iustin Pop | for alloc_policy in "contiguous", "cling", "normal": |
656 | 1005d816 | Iustin Pop | result = utils.RunCmd(["lvextend", "--alloc", alloc_policy, |
657 | 1005d816 | Iustin Pop | "-L", "+%dm" % amount, self.dev_path]) |
658 | 1005d816 | Iustin Pop | if not result.failed: |
659 | 1005d816 | Iustin Pop | return
|
660 | 82463074 | Iustin Pop | _ThrowError("Can't grow LV %s: %s", self.dev_path, result.output) |
661 | a0c3fea1 | Michael Hanselmann | |
662 | a0c3fea1 | Michael Hanselmann | |
663 | 6b90c22e | Iustin Pop | class DRBD8Status(object): |
664 | 6b90c22e | Iustin Pop | """A DRBD status representation class.
|
665 | 6b90c22e | Iustin Pop |
|
666 | 6b90c22e | Iustin Pop | Note that this doesn't support unconfigured devices (cs:Unconfigured).
|
667 | 6b90c22e | Iustin Pop |
|
668 | 6b90c22e | Iustin Pop | """
|
669 | 767d52d3 | Iustin Pop | UNCONF_RE = re.compile(r"\s*[0-9]+:\s*cs:Unconfigured$")
|
670 | 01e2ce3a | Iustin Pop | LINE_RE = re.compile(r"\s*[0-9]+:\s*cs:(\S+)\s+(?:st|ro):([^/]+)/(\S+)"
|
671 | 6b90c22e | Iustin Pop | "\s+ds:([^/]+)/(\S+)\s+.*$")
|
672 | 6b90c22e | Iustin Pop | SYNC_RE = re.compile(r"^.*\ssync'ed:\s*([0-9.]+)%.*"
|
673 | 6b90c22e | Iustin Pop | "\sfinish: ([0-9]+):([0-9]+):([0-9]+)\s.*$")
|
674 | 6b90c22e | Iustin Pop | |
675 | 3c003d9d | Iustin Pop | CS_UNCONFIGURED = "Unconfigured"
|
676 | 3c003d9d | Iustin Pop | CS_STANDALONE = "StandAlone"
|
677 | 3c003d9d | Iustin Pop | CS_WFCONNECTION = "WFConnection"
|
678 | 3c003d9d | Iustin Pop | CS_WFREPORTPARAMS = "WFReportParams"
|
679 | 3c003d9d | Iustin Pop | CS_CONNECTED = "Connected"
|
680 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCS = "StartingSyncS"
|
681 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCT = "StartingSyncT"
|
682 | 3c003d9d | Iustin Pop | CS_WFBITMAPS = "WFBitMapS"
|
683 | 3c003d9d | Iustin Pop | CS_WFBITMAPT = "WFBitMapT"
|
684 | 3c003d9d | Iustin Pop | CS_WFSYNCUUID = "WFSyncUUID"
|
685 | 3c003d9d | Iustin Pop | CS_SYNCSOURCE = "SyncSource"
|
686 | 3c003d9d | Iustin Pop | CS_SYNCTARGET = "SyncTarget"
|
687 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCS = "PausedSyncS"
|
688 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCT = "PausedSyncT"
|
689 | 3c003d9d | Iustin Pop | CSET_SYNC = frozenset([
|
690 | 3c003d9d | Iustin Pop | CS_WFREPORTPARAMS, |
691 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCS, |
692 | 3c003d9d | Iustin Pop | CS_STARTINGSYNCT, |
693 | 3c003d9d | Iustin Pop | CS_WFBITMAPS, |
694 | 3c003d9d | Iustin Pop | CS_WFBITMAPT, |
695 | 3c003d9d | Iustin Pop | CS_WFSYNCUUID, |
696 | 3c003d9d | Iustin Pop | CS_SYNCSOURCE, |
697 | 3c003d9d | Iustin Pop | CS_SYNCTARGET, |
698 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCS, |
699 | 3c003d9d | Iustin Pop | CS_PAUSEDSYNCT, |
700 | 3c003d9d | Iustin Pop | ]) |
701 | 3c003d9d | Iustin Pop | |
702 | 3c003d9d | Iustin Pop | DS_DISKLESS = "Diskless"
|
703 | 3c003d9d | Iustin Pop | DS_ATTACHING = "Attaching" # transient state |
704 | 3c003d9d | Iustin Pop | DS_FAILED = "Failed" # transient state, next: diskless |
705 | 3c003d9d | Iustin Pop | DS_NEGOTIATING = "Negotiating" # transient state |
706 | 3c003d9d | Iustin Pop | DS_INCONSISTENT = "Inconsistent" # while syncing or after creation |
707 | 3c003d9d | Iustin Pop | DS_OUTDATED = "Outdated"
|
708 | 3c003d9d | Iustin Pop | DS_DUNKNOWN = "DUnknown" # shown for peer disk when not connected |
709 | 3c003d9d | Iustin Pop | DS_CONSISTENT = "Consistent"
|
710 | 3c003d9d | Iustin Pop | DS_UPTODATE = "UpToDate" # normal state |
711 | 3c003d9d | Iustin Pop | |
712 | 3c003d9d | Iustin Pop | RO_PRIMARY = "Primary"
|
713 | 3c003d9d | Iustin Pop | RO_SECONDARY = "Secondary"
|
714 | 3c003d9d | Iustin Pop | RO_UNKNOWN = "Unknown"
|
715 | 3c003d9d | Iustin Pop | |
716 | 6b90c22e | Iustin Pop | def __init__(self, procline): |
717 | 767d52d3 | Iustin Pop | u = self.UNCONF_RE.match(procline)
|
718 | 767d52d3 | Iustin Pop | if u:
|
719 | 3c003d9d | Iustin Pop | self.cstatus = self.CS_UNCONFIGURED |
720 | 767d52d3 | Iustin Pop | self.lrole = self.rrole = self.ldisk = self.rdisk = None |
721 | 767d52d3 | Iustin Pop | else:
|
722 | 767d52d3 | Iustin Pop | m = self.LINE_RE.match(procline)
|
723 | 767d52d3 | Iustin Pop | if not m: |
724 | 767d52d3 | Iustin Pop | raise errors.BlockDeviceError("Can't parse input data '%s'" % procline) |
725 | 767d52d3 | Iustin Pop | self.cstatus = m.group(1) |
726 | 767d52d3 | Iustin Pop | self.lrole = m.group(2) |
727 | 767d52d3 | Iustin Pop | self.rrole = m.group(3) |
728 | 767d52d3 | Iustin Pop | self.ldisk = m.group(4) |
729 | 767d52d3 | Iustin Pop | self.rdisk = m.group(5) |
730 | 767d52d3 | Iustin Pop | |
731 | 767d52d3 | Iustin Pop | # end reading of data from the LINE_RE or UNCONF_RE
|
732 | 6b90c22e | Iustin Pop | |
733 | 3c003d9d | Iustin Pop | self.is_standalone = self.cstatus == self.CS_STANDALONE |
734 | 3c003d9d | Iustin Pop | self.is_wfconn = self.cstatus == self.CS_WFCONNECTION |
735 | 3c003d9d | Iustin Pop | self.is_connected = self.cstatus == self.CS_CONNECTED |
736 | 3c003d9d | Iustin Pop | self.is_primary = self.lrole == self.RO_PRIMARY |
737 | 3c003d9d | Iustin Pop | self.is_secondary = self.lrole == self.RO_SECONDARY |
738 | 3c003d9d | Iustin Pop | self.peer_primary = self.rrole == self.RO_PRIMARY |
739 | 3c003d9d | Iustin Pop | self.peer_secondary = self.rrole == self.RO_SECONDARY |
740 | 6b90c22e | Iustin Pop | self.both_primary = self.is_primary and self.peer_primary |
741 | 6b90c22e | Iustin Pop | self.both_secondary = self.is_secondary and self.peer_secondary |
742 | 6b90c22e | Iustin Pop | |
743 | 3c003d9d | Iustin Pop | self.is_diskless = self.ldisk == self.DS_DISKLESS |
744 | 3c003d9d | Iustin Pop | self.is_disk_uptodate = self.ldisk == self.DS_UPTODATE |
745 | 6b90c22e | Iustin Pop | |
746 | 3c003d9d | Iustin Pop | self.is_in_resync = self.cstatus in self.CSET_SYNC |
747 | 3c003d9d | Iustin Pop | self.is_in_use = self.cstatus != self.CS_UNCONFIGURED |
748 | 6b93ec9d | Iustin Pop | |
749 | 6b90c22e | Iustin Pop | m = self.SYNC_RE.match(procline)
|
750 | 6b90c22e | Iustin Pop | if m:
|
751 | 6b90c22e | Iustin Pop | self.sync_percent = float(m.group(1)) |
752 | 6b90c22e | Iustin Pop | hours = int(m.group(2)) |
753 | 6b90c22e | Iustin Pop | minutes = int(m.group(3)) |
754 | 6b90c22e | Iustin Pop | seconds = int(m.group(4)) |
755 | 6b90c22e | Iustin Pop | self.est_time = hours * 3600 + minutes * 60 + seconds |
756 | 6b90c22e | Iustin Pop | else:
|
757 | 3c003d9d | Iustin Pop | # we have (in this if branch) no percent information, but if
|
758 | 3c003d9d | Iustin Pop | # we're resyncing we need to 'fake' a sync percent information,
|
759 | 3c003d9d | Iustin Pop | # as this is how cmdlib determines if it makes sense to wait for
|
760 | 3c003d9d | Iustin Pop | # resyncing or not
|
761 | 3c003d9d | Iustin Pop | if self.is_in_resync: |
762 | 3c003d9d | Iustin Pop | self.sync_percent = 0 |
763 | 3c003d9d | Iustin Pop | else:
|
764 | 3c003d9d | Iustin Pop | self.sync_percent = None |
765 | 6b90c22e | Iustin Pop | self.est_time = None |
766 | 6b90c22e | Iustin Pop | |
767 | 6b90c22e | Iustin Pop | |
768 | 0f7f32d9 | Iustin Pop | class BaseDRBD(BlockDev): |
769 | 0f7f32d9 | Iustin Pop | """Base DRBD class.
|
770 | a8083063 | Iustin Pop |
|
771 | 0f7f32d9 | Iustin Pop | This class contains a few bits of common functionality between the
|
772 | 0f7f32d9 | Iustin Pop | 0.7 and 8.x versions of DRBD.
|
773 | 0f7f32d9 | Iustin Pop |
|
774 | abdf0113 | Iustin Pop | """
|
775 | abdf0113 | Iustin Pop | _VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)"
|
776 | abdf0113 | Iustin Pop | r" \(api:(\d+)/proto:(\d+)(?:-(\d+))?\)")
|
777 | a8083063 | Iustin Pop | |
778 | abdf0113 | Iustin Pop | _DRBD_MAJOR = 147
|
779 | abdf0113 | Iustin Pop | _ST_UNCONFIGURED = "Unconfigured"
|
780 | abdf0113 | Iustin Pop | _ST_WFCONNECTION = "WFConnection"
|
781 | abdf0113 | Iustin Pop | _ST_CONNECTED = "Connected"
|
782 | a8083063 | Iustin Pop | |
783 | 6b90c22e | Iustin Pop | _STATUS_FILE = "/proc/drbd"
|
784 | 6b90c22e | Iustin Pop | |
785 | abdf0113 | Iustin Pop | @staticmethod
|
786 | 6b90c22e | Iustin Pop | def _GetProcData(filename=_STATUS_FILE): |
787 | abdf0113 | Iustin Pop | """Return data from /proc/drbd.
|
788 | a8083063 | Iustin Pop |
|
789 | a8083063 | Iustin Pop | """
|
790 | abdf0113 | Iustin Pop | try:
|
791 | 13998ef2 | Michael Hanselmann | data = utils.ReadFile(filename).splitlines() |
792 | f6eaed12 | Iustin Pop | except EnvironmentError, err: |
793 | f6eaed12 | Iustin Pop | if err.errno == errno.ENOENT:
|
794 | f6eaed12 | Iustin Pop | _ThrowError("The file %s cannot be opened, check if the module"
|
795 | f6eaed12 | Iustin Pop | " is loaded (%s)", filename, str(err)) |
796 | f6eaed12 | Iustin Pop | else:
|
797 | f6eaed12 | Iustin Pop | _ThrowError("Can't read the DRBD proc file %s: %s", filename, str(err)) |
798 | abdf0113 | Iustin Pop | if not data: |
799 | 82463074 | Iustin Pop | _ThrowError("Can't read any data from %s", filename)
|
800 | abdf0113 | Iustin Pop | return data
|
801 | a8083063 | Iustin Pop | |
802 | abdf0113 | Iustin Pop | @staticmethod
|
803 | abdf0113 | Iustin Pop | def _MassageProcData(data): |
804 | abdf0113 | Iustin Pop | """Transform the output of _GetProdData into a nicer form.
|
805 | a8083063 | Iustin Pop |
|
806 | c41eea6e | Iustin Pop | @return: a dictionary of minor: joined lines from /proc/drbd
|
807 | c41eea6e | Iustin Pop | for that minor
|
808 | a8083063 | Iustin Pop |
|
809 | a8083063 | Iustin Pop | """
|
810 | abdf0113 | Iustin Pop | lmatch = re.compile("^ *([0-9]+):.*$")
|
811 | abdf0113 | Iustin Pop | results = {} |
812 | abdf0113 | Iustin Pop | old_minor = old_line = None
|
813 | abdf0113 | Iustin Pop | for line in data: |
814 | 67d101d4 | Iustin Pop | if not line: # completely empty lines, as can be returned by drbd8.0+ |
815 | 67d101d4 | Iustin Pop | continue
|
816 | abdf0113 | Iustin Pop | lresult = lmatch.match(line) |
817 | abdf0113 | Iustin Pop | if lresult is not None: |
818 | abdf0113 | Iustin Pop | if old_minor is not None: |
819 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
820 | abdf0113 | Iustin Pop | old_minor = int(lresult.group(1)) |
821 | abdf0113 | Iustin Pop | old_line = line |
822 | abdf0113 | Iustin Pop | else:
|
823 | abdf0113 | Iustin Pop | if old_minor is not None: |
824 | abdf0113 | Iustin Pop | old_line += " " + line.strip()
|
825 | abdf0113 | Iustin Pop | # add last line
|
826 | abdf0113 | Iustin Pop | if old_minor is not None: |
827 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
828 | abdf0113 | Iustin Pop | return results
|
829 | a8083063 | Iustin Pop | |
830 | abdf0113 | Iustin Pop | @classmethod
|
831 | abdf0113 | Iustin Pop | def _GetVersion(cls): |
832 | abdf0113 | Iustin Pop | """Return the DRBD version.
|
833 | a8083063 | Iustin Pop |
|
834 | abdf0113 | Iustin Pop | This will return a dict with keys:
|
835 | c41eea6e | Iustin Pop | - k_major
|
836 | c41eea6e | Iustin Pop | - k_minor
|
837 | c41eea6e | Iustin Pop | - k_point
|
838 | c41eea6e | Iustin Pop | - api
|
839 | c41eea6e | Iustin Pop | - proto
|
840 | c41eea6e | Iustin Pop | - proto2 (only on drbd > 8.2.X)
|
841 | a8083063 | Iustin Pop |
|
842 | a8083063 | Iustin Pop | """
|
843 | abdf0113 | Iustin Pop | proc_data = cls._GetProcData() |
844 | abdf0113 | Iustin Pop | first_line = proc_data[0].strip()
|
845 | abdf0113 | Iustin Pop | version = cls._VERSION_RE.match(first_line) |
846 | abdf0113 | Iustin Pop | if not version: |
847 | abdf0113 | Iustin Pop | raise errors.BlockDeviceError("Can't parse DRBD version from '%s'" % |
848 | abdf0113 | Iustin Pop | first_line) |
849 | a8083063 | Iustin Pop | |
850 | abdf0113 | Iustin Pop | values = version.groups() |
851 | abdf0113 | Iustin Pop | retval = {'k_major': int(values[0]), |
852 | abdf0113 | Iustin Pop | 'k_minor': int(values[1]), |
853 | abdf0113 | Iustin Pop | 'k_point': int(values[2]), |
854 | abdf0113 | Iustin Pop | 'api': int(values[3]), |
855 | abdf0113 | Iustin Pop | 'proto': int(values[4]), |
856 | abdf0113 | Iustin Pop | } |
857 | abdf0113 | Iustin Pop | if values[5] is not None: |
858 | abdf0113 | Iustin Pop | retval['proto2'] = values[5] |
859 | a8083063 | Iustin Pop | |
860 | abdf0113 | Iustin Pop | return retval
|
861 | abdf0113 | Iustin Pop | |
862 | abdf0113 | Iustin Pop | @staticmethod
|
863 | abdf0113 | Iustin Pop | def _DevPath(minor): |
864 | abdf0113 | Iustin Pop | """Return the path to a drbd device for a given minor.
|
865 | a8083063 | Iustin Pop |
|
866 | a8083063 | Iustin Pop | """
|
867 | abdf0113 | Iustin Pop | return "/dev/drbd%d" % minor |
868 | a8083063 | Iustin Pop | |
869 | abdf0113 | Iustin Pop | @classmethod
|
870 | 6d2e83d5 | Iustin Pop | def GetUsedDevs(cls): |
871 | abdf0113 | Iustin Pop | """Compute the list of used DRBD devices.
|
872 | a8083063 | Iustin Pop |
|
873 | a8083063 | Iustin Pop | """
|
874 | abdf0113 | Iustin Pop | data = cls._GetProcData() |
875 | a8083063 | Iustin Pop | |
876 | abdf0113 | Iustin Pop | used_devs = {} |
877 | abdf0113 | Iustin Pop | valid_line = re.compile("^ *([0-9]+): cs:([^ ]+).*$")
|
878 | abdf0113 | Iustin Pop | for line in data: |
879 | abdf0113 | Iustin Pop | match = valid_line.match(line) |
880 | abdf0113 | Iustin Pop | if not match: |
881 | abdf0113 | Iustin Pop | continue
|
882 | abdf0113 | Iustin Pop | minor = int(match.group(1)) |
883 | abdf0113 | Iustin Pop | state = match.group(2)
|
884 | abdf0113 | Iustin Pop | if state == cls._ST_UNCONFIGURED:
|
885 | abdf0113 | Iustin Pop | continue
|
886 | abdf0113 | Iustin Pop | used_devs[minor] = state, line |
887 | a8083063 | Iustin Pop | |
888 | abdf0113 | Iustin Pop | return used_devs
|
889 | a8083063 | Iustin Pop | |
890 | abdf0113 | Iustin Pop | def _SetFromMinor(self, minor): |
891 | abdf0113 | Iustin Pop | """Set our parameters based on the given minor.
|
892 | 0834c866 | Iustin Pop |
|
893 | abdf0113 | Iustin Pop | This sets our minor variable and our dev_path.
|
894 | a8083063 | Iustin Pop |
|
895 | a8083063 | Iustin Pop | """
|
896 | abdf0113 | Iustin Pop | if minor is None: |
897 | abdf0113 | Iustin Pop | self.minor = self.dev_path = None |
898 | cb999543 | Iustin Pop | self.attached = False |
899 | a8083063 | Iustin Pop | else:
|
900 | abdf0113 | Iustin Pop | self.minor = minor
|
901 | abdf0113 | Iustin Pop | self.dev_path = self._DevPath(minor) |
902 | cb999543 | Iustin Pop | self.attached = True |
903 | a8083063 | Iustin Pop | |
904 | a8083063 | Iustin Pop | @staticmethod
|
905 | abdf0113 | Iustin Pop | def _CheckMetaSize(meta_device): |
906 | abdf0113 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
907 | a8083063 | Iustin Pop |
|
908 | abdf0113 | Iustin Pop | This currently only check the size, which must be around
|
909 | abdf0113 | Iustin Pop | 128MiB.
|
910 | a8083063 | Iustin Pop |
|
911 | a8083063 | Iustin Pop | """
|
912 | abdf0113 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize", meta_device]) |
913 | abdf0113 | Iustin Pop | if result.failed:
|
914 | 9c793cfb | Iustin Pop | _ThrowError("Failed to get device size: %s - %s",
|
915 | 9c793cfb | Iustin Pop | result.fail_reason, result.output) |
916 | a8083063 | Iustin Pop | try:
|
917 | abdf0113 | Iustin Pop | sectors = int(result.stdout)
|
918 | abdf0113 | Iustin Pop | except ValueError: |
919 | 9c793cfb | Iustin Pop | _ThrowError("Invalid output from blockdev: '%s'", result.stdout)
|
920 | abdf0113 | Iustin Pop | bytes = sectors * 512
|
921 | abdf0113 | Iustin Pop | if bytes < 128 * 1024 * 1024: # less than 128MiB |
922 | 9c793cfb | Iustin Pop | _ThrowError("Meta device too small (%.2fMib)", (bytes / 1024 / 1024)) |
923 | 1dc10972 | Iustin Pop | # the maximum *valid* size of the meta device when living on top
|
924 | 1dc10972 | Iustin Pop | # of LVM is hard to compute: it depends on the number of stripes
|
925 | 1dc10972 | Iustin Pop | # and the PE size; e.g. a 2-stripe, 64MB PE will result in a 128MB
|
926 | 1dc10972 | Iustin Pop | # (normal size), but an eight-stripe 128MB PE will result in a 1GB
|
927 | 1dc10972 | Iustin Pop | # size meta device; as such, we restrict it to 1GB (a little bit
|
928 | 1dc10972 | Iustin Pop | # too generous, but making assumptions about PE size is hard)
|
929 | 1dc10972 | Iustin Pop | if bytes > 1024 * 1024 * 1024: |
930 | 9c793cfb | Iustin Pop | _ThrowError("Meta device too big (%.2fMiB)", (bytes / 1024 / 1024)) |
931 | a8083063 | Iustin Pop | |
932 | abdf0113 | Iustin Pop | def Rename(self, new_id): |
933 | abdf0113 | Iustin Pop | """Rename a device.
|
934 | a8083063 | Iustin Pop |
|
935 | abdf0113 | Iustin Pop | This is not supported for drbd devices.
|
936 | a8083063 | Iustin Pop |
|
937 | a8083063 | Iustin Pop | """
|
938 | abdf0113 | Iustin Pop | raise errors.ProgrammerError("Can't rename a drbd device") |
939 | a8083063 | Iustin Pop | |
940 | f3e513ad | Iustin Pop | |
941 | a2cfdea2 | Iustin Pop | class DRBD8(BaseDRBD): |
942 | a2cfdea2 | Iustin Pop | """DRBD v8.x block device.
|
943 | a2cfdea2 | Iustin Pop |
|
944 | a2cfdea2 | Iustin Pop | This implements the local host part of the DRBD device, i.e. it
|
945 | a2cfdea2 | Iustin Pop | doesn't do anything to the supposed peer. If you need a fully
|
946 | a2cfdea2 | Iustin Pop | connected DRBD pair, you need to use this class on both hosts.
|
947 | a2cfdea2 | Iustin Pop |
|
948 | a2cfdea2 | Iustin Pop | The unique_id for the drbd device is the (local_ip, local_port,
|
949 | a2cfdea2 | Iustin Pop | remote_ip, remote_port) tuple, and it must have two children: the
|
950 | a2cfdea2 | Iustin Pop | data device and the meta_device. The meta device is checked for
|
951 | a2cfdea2 | Iustin Pop | valid size and is zeroed on create.
|
952 | a2cfdea2 | Iustin Pop |
|
953 | a2cfdea2 | Iustin Pop | """
|
954 | a2cfdea2 | Iustin Pop | _MAX_MINORS = 255
|
955 | a2cfdea2 | Iustin Pop | _PARSE_SHOW = None
|
956 | a2cfdea2 | Iustin Pop | |
957 | cf8df3f3 | Iustin Pop | # timeout constants
|
958 | cf8df3f3 | Iustin Pop | _NET_RECONFIG_TIMEOUT = 60
|
959 | cf8df3f3 | Iustin Pop | |
960 | 464f8daf | Iustin Pop | def __init__(self, unique_id, children, size): |
961 | fc1dc9d7 | Iustin Pop | if children and children.count(None) > 0: |
962 | fc1dc9d7 | Iustin Pop | children = [] |
963 | 464f8daf | Iustin Pop | super(DRBD8, self).__init__(unique_id, children, size) |
964 | a2cfdea2 | Iustin Pop | self.major = self._DRBD_MAJOR |
965 | c3f9340c | Guido Trotter | version = self._GetVersion()
|
966 | c3f9340c | Guido Trotter | if version['k_major'] != 8 : |
967 | 82463074 | Iustin Pop | _ThrowError("Mismatch in DRBD kernel version and requested ganeti"
|
968 | 82463074 | Iustin Pop | " usage: kernel is %s.%s, ganeti wants 8.x",
|
969 | 82463074 | Iustin Pop | version['k_major'], version['k_minor']) |
970 | a2cfdea2 | Iustin Pop | |
971 | b00b95dd | Iustin Pop | if len(children) not in (0, 2): |
972 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(children)) |
973 | f9518d38 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 6: |
974 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
975 | ffa1c0dc | Iustin Pop | (self._lhost, self._lport, |
976 | ffa1c0dc | Iustin Pop | self._rhost, self._rport, |
977 | f9518d38 | Iustin Pop | self._aminor, self._secret) = unique_id |
978 | ffa1c0dc | Iustin Pop | if (self._lhost is not None and self._lhost == self._rhost and |
979 | ffa1c0dc | Iustin Pop | self._lport == self._rport): |
980 | ffa1c0dc | Iustin Pop | raise ValueError("Invalid configuration data, same local/remote %s" % |
981 | ffa1c0dc | Iustin Pop | (unique_id,)) |
982 | a2cfdea2 | Iustin Pop | self.Attach()
|
983 | a2cfdea2 | Iustin Pop | |
984 | a2cfdea2 | Iustin Pop | @classmethod
|
985 | a2cfdea2 | Iustin Pop | def _InitMeta(cls, minor, dev_path): |
986 | a2cfdea2 | Iustin Pop | """Initialize a meta device.
|
987 | a2cfdea2 | Iustin Pop |
|
988 | a2cfdea2 | Iustin Pop | This will not work if the given minor is in use.
|
989 | a2cfdea2 | Iustin Pop |
|
990 | a2cfdea2 | Iustin Pop | """
|
991 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", "--force", cls._DevPath(minor), |
992 | a2cfdea2 | Iustin Pop | "v08", dev_path, "0", "create-md"]) |
993 | a2cfdea2 | Iustin Pop | if result.failed:
|
994 | 82463074 | Iustin Pop | _ThrowError("Can't initialize meta device: %s", result.output)
|
995 | a2cfdea2 | Iustin Pop | |
996 | a2cfdea2 | Iustin Pop | @classmethod
|
997 | a2cfdea2 | Iustin Pop | def _FindUnusedMinor(cls): |
998 | a2cfdea2 | Iustin Pop | """Find an unused DRBD device.
|
999 | a2cfdea2 | Iustin Pop |
|
1000 | a2cfdea2 | Iustin Pop | This is specific to 8.x as the minors are allocated dynamically,
|
1001 | a2cfdea2 | Iustin Pop | so non-existing numbers up to a max minor count are actually free.
|
1002 | a2cfdea2 | Iustin Pop |
|
1003 | a2cfdea2 | Iustin Pop | """
|
1004 | a2cfdea2 | Iustin Pop | data = cls._GetProcData() |
1005 | a2cfdea2 | Iustin Pop | |
1006 | a2cfdea2 | Iustin Pop | unused_line = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
1007 | a2cfdea2 | Iustin Pop | used_line = re.compile("^ *([0-9]+): cs:")
|
1008 | a2cfdea2 | Iustin Pop | highest = None
|
1009 | a2cfdea2 | Iustin Pop | for line in data: |
1010 | a2cfdea2 | Iustin Pop | match = unused_line.match(line) |
1011 | a2cfdea2 | Iustin Pop | if match:
|
1012 | a2cfdea2 | Iustin Pop | return int(match.group(1)) |
1013 | a2cfdea2 | Iustin Pop | match = used_line.match(line) |
1014 | a2cfdea2 | Iustin Pop | if match:
|
1015 | a2cfdea2 | Iustin Pop | minor = int(match.group(1)) |
1016 | a2cfdea2 | Iustin Pop | highest = max(highest, minor)
|
1017 | a2cfdea2 | Iustin Pop | if highest is None: # there are no minors in use at all |
1018 | a2cfdea2 | Iustin Pop | return 0 |
1019 | a2cfdea2 | Iustin Pop | if highest >= cls._MAX_MINORS:
|
1020 | 468c5f77 | Iustin Pop | logging.error("Error: no free drbd minors!")
|
1021 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
1022 | a2cfdea2 | Iustin Pop | return highest + 1 |
1023 | a2cfdea2 | Iustin Pop | |
1024 | a2cfdea2 | Iustin Pop | @classmethod
|
1025 | a2cfdea2 | Iustin Pop | def _GetShowParser(cls): |
1026 | a2cfdea2 | Iustin Pop | """Return a parser for `drbd show` output.
|
1027 | a2cfdea2 | Iustin Pop |
|
1028 | a2cfdea2 | Iustin Pop | This will either create or return an already-create parser for the
|
1029 | a2cfdea2 | Iustin Pop | output of the command `drbd show`.
|
1030 | a2cfdea2 | Iustin Pop |
|
1031 | a2cfdea2 | Iustin Pop | """
|
1032 | a2cfdea2 | Iustin Pop | if cls._PARSE_SHOW is not None: |
1033 | a2cfdea2 | Iustin Pop | return cls._PARSE_SHOW
|
1034 | a2cfdea2 | Iustin Pop | |
1035 | a2cfdea2 | Iustin Pop | # pyparsing setup
|
1036 | a2cfdea2 | Iustin Pop | lbrace = pyp.Literal("{").suppress()
|
1037 | a2cfdea2 | Iustin Pop | rbrace = pyp.Literal("}").suppress()
|
1038 | a2cfdea2 | Iustin Pop | semi = pyp.Literal(";").suppress()
|
1039 | a2cfdea2 | Iustin Pop | # this also converts the value to an int
|
1040 | c522ea02 | Iustin Pop | number = pyp.Word(pyp.nums).setParseAction(lambda s, l, t: int(t[0])) |
1041 | a2cfdea2 | Iustin Pop | |
1042 | a2cfdea2 | Iustin Pop | comment = pyp.Literal ("#") + pyp.Optional(pyp.restOfLine)
|
1043 | a2cfdea2 | Iustin Pop | defa = pyp.Literal("_is_default").suppress()
|
1044 | a2cfdea2 | Iustin Pop | dbl_quote = pyp.Literal('"').suppress()
|
1045 | a2cfdea2 | Iustin Pop | |
1046 | a2cfdea2 | Iustin Pop | keyword = pyp.Word(pyp.alphanums + '-')
|
1047 | a2cfdea2 | Iustin Pop | |
1048 | a2cfdea2 | Iustin Pop | # value types
|
1049 | a2cfdea2 | Iustin Pop | value = pyp.Word(pyp.alphanums + '_-/.:')
|
1050 | a2cfdea2 | Iustin Pop | quoted = dbl_quote + pyp.CharsNotIn('"') + dbl_quote
|
1051 | 34e71fea | Karsten Keil | addr_type = (pyp.Optional(pyp.Literal("ipv4")).suppress() +
|
1052 | 34e71fea | Karsten Keil | pyp.Optional(pyp.Literal("ipv6")).suppress())
|
1053 | 34e71fea | Karsten Keil | addr_port = (addr_type + pyp.Word(pyp.nums + '.') +
|
1054 | 34e71fea | Karsten Keil | pyp.Literal(':').suppress() + number)
|
1055 | a2cfdea2 | Iustin Pop | # meta device, extended syntax
|
1056 | a2cfdea2 | Iustin Pop | meta_value = ((value ^ quoted) + pyp.Literal('[').suppress() +
|
1057 | a2cfdea2 | Iustin Pop | number + pyp.Word(']').suppress())
|
1058 | 01e2ce3a | Iustin Pop | # device name, extended syntax
|
1059 | 01e2ce3a | Iustin Pop | device_value = pyp.Literal("minor").suppress() + number
|
1060 | a2cfdea2 | Iustin Pop | |
1061 | a2cfdea2 | Iustin Pop | # a statement
|
1062 | a2cfdea2 | Iustin Pop | stmt = (~rbrace + keyword + ~lbrace + |
1063 | 01e2ce3a | Iustin Pop | pyp.Optional(addr_port ^ value ^ quoted ^ meta_value ^ |
1064 | 01e2ce3a | Iustin Pop | device_value) + |
1065 | a2cfdea2 | Iustin Pop | pyp.Optional(defa) + semi + |
1066 | a2cfdea2 | Iustin Pop | pyp.Optional(pyp.restOfLine).suppress()) |
1067 | a2cfdea2 | Iustin Pop | |
1068 | a2cfdea2 | Iustin Pop | # an entire section
|
1069 | a2cfdea2 | Iustin Pop | section_name = pyp.Word(pyp.alphas + '_')
|
1070 | a2cfdea2 | Iustin Pop | section = section_name + lbrace + pyp.ZeroOrMore(pyp.Group(stmt)) + rbrace |
1071 | a2cfdea2 | Iustin Pop | |
1072 | a2cfdea2 | Iustin Pop | bnf = pyp.ZeroOrMore(pyp.Group(section ^ stmt)) |
1073 | a2cfdea2 | Iustin Pop | bnf.ignore(comment) |
1074 | a2cfdea2 | Iustin Pop | |
1075 | a2cfdea2 | Iustin Pop | cls._PARSE_SHOW = bnf |
1076 | a2cfdea2 | Iustin Pop | |
1077 | a2cfdea2 | Iustin Pop | return bnf
|
1078 | a2cfdea2 | Iustin Pop | |
1079 | a2cfdea2 | Iustin Pop | @classmethod
|
1080 | 3840729d | Iustin Pop | def _GetShowData(cls, minor): |
1081 | 3840729d | Iustin Pop | """Return the `drbdsetup show` data for a minor.
|
1082 | a2cfdea2 | Iustin Pop |
|
1083 | a2cfdea2 | Iustin Pop | """
|
1084 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
1085 | a2cfdea2 | Iustin Pop | if result.failed:
|
1086 | 468c5f77 | Iustin Pop | logging.error("Can't display the drbd config: %s - %s",
|
1087 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
1088 | 3840729d | Iustin Pop | return None |
1089 | 3840729d | Iustin Pop | return result.stdout
|
1090 | 3840729d | Iustin Pop | |
1091 | 3840729d | Iustin Pop | @classmethod
|
1092 | 3840729d | Iustin Pop | def _GetDevInfo(cls, out): |
1093 | 3840729d | Iustin Pop | """Parse details about a given DRBD minor.
|
1094 | 3840729d | Iustin Pop |
|
1095 | 3840729d | Iustin Pop | This return, if available, the local backing device (as a path)
|
1096 | 3840729d | Iustin Pop | and the local and remote (ip, port) information from a string
|
1097 | 3840729d | Iustin Pop | containing the output of the `drbdsetup show` command as returned
|
1098 | 3840729d | Iustin Pop | by _GetShowData.
|
1099 | 3840729d | Iustin Pop |
|
1100 | 3840729d | Iustin Pop | """
|
1101 | 3840729d | Iustin Pop | data = {} |
1102 | a2cfdea2 | Iustin Pop | if not out: |
1103 | a2cfdea2 | Iustin Pop | return data
|
1104 | a2cfdea2 | Iustin Pop | |
1105 | a2cfdea2 | Iustin Pop | bnf = cls._GetShowParser() |
1106 | a2cfdea2 | Iustin Pop | # run pyparse
|
1107 | a2cfdea2 | Iustin Pop | |
1108 | a2cfdea2 | Iustin Pop | try:
|
1109 | a2cfdea2 | Iustin Pop | results = bnf.parseString(out) |
1110 | a2cfdea2 | Iustin Pop | except pyp.ParseException, err:
|
1111 | 82463074 | Iustin Pop | _ThrowError("Can't parse drbdsetup show output: %s", str(err)) |
1112 | a2cfdea2 | Iustin Pop | |
1113 | a2cfdea2 | Iustin Pop | # and massage the results into our desired format
|
1114 | a2cfdea2 | Iustin Pop | for section in results: |
1115 | a2cfdea2 | Iustin Pop | sname = section[0]
|
1116 | a2cfdea2 | Iustin Pop | if sname == "_this_host": |
1117 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
1118 | a2cfdea2 | Iustin Pop | if lst[0] == "disk": |
1119 | a2cfdea2 | Iustin Pop | data["local_dev"] = lst[1] |
1120 | a2cfdea2 | Iustin Pop | elif lst[0] == "meta-disk": |
1121 | a2cfdea2 | Iustin Pop | data["meta_dev"] = lst[1] |
1122 | a2cfdea2 | Iustin Pop | data["meta_index"] = lst[2] |
1123 | a2cfdea2 | Iustin Pop | elif lst[0] == "address": |
1124 | a2cfdea2 | Iustin Pop | data["local_addr"] = tuple(lst[1:]) |
1125 | a2cfdea2 | Iustin Pop | elif sname == "_remote_host": |
1126 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
1127 | a2cfdea2 | Iustin Pop | if lst[0] == "address": |
1128 | a2cfdea2 | Iustin Pop | data["remote_addr"] = tuple(lst[1:]) |
1129 | a2cfdea2 | Iustin Pop | return data
|
1130 | a2cfdea2 | Iustin Pop | |
1131 | a2cfdea2 | Iustin Pop | def _MatchesLocal(self, info): |
1132 | a2cfdea2 | Iustin Pop | """Test if our local config matches with an existing device.
|
1133 | a2cfdea2 | Iustin Pop |
|
1134 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1135 | a2cfdea2 | Iustin Pop | method tests if our local backing device is the same as the one in
|
1136 | a2cfdea2 | Iustin Pop | the info parameter, in effect testing if we look like the given
|
1137 | a2cfdea2 | Iustin Pop | device.
|
1138 | a2cfdea2 | Iustin Pop |
|
1139 | a2cfdea2 | Iustin Pop | """
|
1140 | b00b95dd | Iustin Pop | if self._children: |
1141 | b00b95dd | Iustin Pop | backend, meta = self._children
|
1142 | b00b95dd | Iustin Pop | else:
|
1143 | b00b95dd | Iustin Pop | backend = meta = None
|
1144 | b00b95dd | Iustin Pop | |
1145 | a2cfdea2 | Iustin Pop | if backend is not None: |
1146 | b00b95dd | Iustin Pop | retval = ("local_dev" in info and info["local_dev"] == backend.dev_path) |
1147 | a2cfdea2 | Iustin Pop | else:
|
1148 | a2cfdea2 | Iustin Pop | retval = ("local_dev" not in info) |
1149 | b00b95dd | Iustin Pop | |
1150 | a2cfdea2 | Iustin Pop | if meta is not None: |
1151 | b00b95dd | Iustin Pop | retval = retval and ("meta_dev" in info and |
1152 | b00b95dd | Iustin Pop | info["meta_dev"] == meta.dev_path)
|
1153 | b00b95dd | Iustin Pop | retval = retval and ("meta_index" in info and |
1154 | b00b95dd | Iustin Pop | info["meta_index"] == 0) |
1155 | a2cfdea2 | Iustin Pop | else:
|
1156 | a2cfdea2 | Iustin Pop | retval = retval and ("meta_dev" not in info and |
1157 | a2cfdea2 | Iustin Pop | "meta_index" not in info) |
1158 | a2cfdea2 | Iustin Pop | return retval
|
1159 | a2cfdea2 | Iustin Pop | |
1160 | a2cfdea2 | Iustin Pop | def _MatchesNet(self, info): |
1161 | a2cfdea2 | Iustin Pop | """Test if our network config matches with an existing device.
|
1162 | a2cfdea2 | Iustin Pop |
|
1163 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1164 | a2cfdea2 | Iustin Pop | method tests if our network configuration is the same as the one
|
1165 | a2cfdea2 | Iustin Pop | in the info parameter, in effect testing if we look like the given
|
1166 | a2cfdea2 | Iustin Pop | device.
|
1167 | a2cfdea2 | Iustin Pop |
|
1168 | a2cfdea2 | Iustin Pop | """
|
1169 | a2cfdea2 | Iustin Pop | if (((self._lhost is None and not ("local_addr" in info)) and |
1170 | a2cfdea2 | Iustin Pop | (self._rhost is None and not ("remote_addr" in info)))): |
1171 | a2cfdea2 | Iustin Pop | return True |
1172 | a2cfdea2 | Iustin Pop | |
1173 | a2cfdea2 | Iustin Pop | if self._lhost is None: |
1174 | a2cfdea2 | Iustin Pop | return False |
1175 | a2cfdea2 | Iustin Pop | |
1176 | a2cfdea2 | Iustin Pop | if not ("local_addr" in info and |
1177 | a2cfdea2 | Iustin Pop | "remote_addr" in info): |
1178 | a2cfdea2 | Iustin Pop | return False |
1179 | a2cfdea2 | Iustin Pop | |
1180 | a2cfdea2 | Iustin Pop | retval = (info["local_addr"] == (self._lhost, self._lport)) |
1181 | a2cfdea2 | Iustin Pop | retval = (retval and
|
1182 | a2cfdea2 | Iustin Pop | info["remote_addr"] == (self._rhost, self._rport)) |
1183 | a2cfdea2 | Iustin Pop | return retval
|
1184 | a2cfdea2 | Iustin Pop | |
1185 | a2cfdea2 | Iustin Pop | @classmethod
|
1186 | f069addf | Iustin Pop | def _AssembleLocal(cls, minor, backend, meta, size): |
1187 | a2cfdea2 | Iustin Pop | """Configure the local part of a DRBD device.
|
1188 | a2cfdea2 | Iustin Pop |
|
1189 | a2cfdea2 | Iustin Pop | """
|
1190 | 333411a7 | Guido Trotter | args = ["drbdsetup", cls._DevPath(minor), "disk", |
1191 | f069addf | Iustin Pop | backend, meta, "0",
|
1192 | f069addf | Iustin Pop | "-e", "detach", |
1193 | f069addf | Iustin Pop | "--create-device"]
|
1194 | 60bca04a | Iustin Pop | if size:
|
1195 | 60bca04a | Iustin Pop | args.extend(["-d", "%sm" % size]) |
1196 | 333411a7 | Guido Trotter | result = utils.RunCmd(args) |
1197 | a2cfdea2 | Iustin Pop | if result.failed:
|
1198 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't attach local disk: %s", minor, result.output)
|
1199 | a2cfdea2 | Iustin Pop | |
1200 | a2cfdea2 | Iustin Pop | @classmethod
|
1201 | a2cfdea2 | Iustin Pop | def _AssembleNet(cls, minor, net_info, protocol, |
1202 | a2cfdea2 | Iustin Pop | dual_pri=False, hmac=None, secret=None): |
1203 | a2cfdea2 | Iustin Pop | """Configure the network part of the device.
|
1204 | a2cfdea2 | Iustin Pop |
|
1205 | a2cfdea2 | Iustin Pop | """
|
1206 | a2cfdea2 | Iustin Pop | lhost, lport, rhost, rport = net_info |
1207 | 52857176 | Iustin Pop | if None in net_info: |
1208 | 52857176 | Iustin Pop | # we don't want network connection and actually want to make
|
1209 | 52857176 | Iustin Pop | # sure its shutdown
|
1210 | 1063abd1 | Iustin Pop | cls._ShutdownNet(minor) |
1211 | 1063abd1 | Iustin Pop | return
|
1212 | 52857176 | Iustin Pop | |
1213 | 7d585316 | Iustin Pop | # Workaround for a race condition. When DRBD is doing its dance to
|
1214 | 7d585316 | Iustin Pop | # establish a connection with its peer, it also sends the
|
1215 | 7d585316 | Iustin Pop | # synchronization speed over the wire. In some cases setting the
|
1216 | 7d585316 | Iustin Pop | # sync speed only after setting up both sides can race with DRBD
|
1217 | 7d585316 | Iustin Pop | # connecting, hence we set it here before telling DRBD anything
|
1218 | 7d585316 | Iustin Pop | # about its peer.
|
1219 | 7d585316 | Iustin Pop | cls._SetMinorSyncSpeed(minor, constants.SYNC_SPEED) |
1220 | 7d585316 | Iustin Pop | |
1221 | a2cfdea2 | Iustin Pop | args = ["drbdsetup", cls._DevPath(minor), "net", |
1222 | f38478b2 | Iustin Pop | "%s:%s" % (lhost, lport), "%s:%s" % (rhost, rport), protocol, |
1223 | f38478b2 | Iustin Pop | "-A", "discard-zero-changes", |
1224 | f38478b2 | Iustin Pop | "-B", "consensus", |
1225 | ab6cc81c | Iustin Pop | "--create-device",
|
1226 | f38478b2 | Iustin Pop | ] |
1227 | a2cfdea2 | Iustin Pop | if dual_pri:
|
1228 | a2cfdea2 | Iustin Pop | args.append("-m")
|
1229 | a2cfdea2 | Iustin Pop | if hmac and secret: |
1230 | a2cfdea2 | Iustin Pop | args.extend(["-a", hmac, "-x", secret]) |
1231 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(args) |
1232 | a2cfdea2 | Iustin Pop | if result.failed:
|
1233 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't setup network: %s - %s",
|
1234 | 1063abd1 | Iustin Pop | minor, result.fail_reason, result.output) |
1235 | a2cfdea2 | Iustin Pop | |
1236 | def8e2f6 | Michael Hanselmann | def _CheckNetworkConfig(): |
1237 | 3840729d | Iustin Pop | info = cls._GetDevInfo(cls._GetShowData(minor)) |
1238 | a2cfdea2 | Iustin Pop | if not "local_addr" in info or not "remote_addr" in info: |
1239 | def8e2f6 | Michael Hanselmann | raise utils.RetryAgain()
|
1240 | def8e2f6 | Michael Hanselmann | |
1241 | a2cfdea2 | Iustin Pop | if (info["local_addr"] != (lhost, lport) or |
1242 | a2cfdea2 | Iustin Pop | info["remote_addr"] != (rhost, rport)):
|
1243 | def8e2f6 | Michael Hanselmann | raise utils.RetryAgain()
|
1244 | def8e2f6 | Michael Hanselmann | |
1245 | def8e2f6 | Michael Hanselmann | try:
|
1246 | def8e2f6 | Michael Hanselmann | utils.Retry(_CheckNetworkConfig, 1.0, 10.0) |
1247 | def8e2f6 | Michael Hanselmann | except utils.RetryTimeout:
|
1248 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: timeout while configuring network", minor)
|
1249 | a2cfdea2 | Iustin Pop | |
1250 | b00b95dd | Iustin Pop | def AddChildren(self, devices): |
1251 | b00b95dd | Iustin Pop | """Add a disk to the DRBD device.
|
1252 | b00b95dd | Iustin Pop |
|
1253 | b00b95dd | Iustin Pop | """
|
1254 | b00b95dd | Iustin Pop | if self.minor is None: |
1255 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't attach to dbrd8 during AddChildren",
|
1256 | 82463074 | Iustin Pop | self._aminor)
|
1257 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1258 | 82463074 | Iustin Pop | _ThrowError("drbd%d: need two devices for AddChildren", self.minor) |
1259 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1260 | 03ece5f3 | Iustin Pop | if "local_dev" in info: |
1261 | 82463074 | Iustin Pop | _ThrowError("drbd%d: already attached to a local disk", self.minor) |
1262 | b00b95dd | Iustin Pop | backend, meta = devices |
1263 | b00b95dd | Iustin Pop | if backend.dev_path is None or meta.dev_path is None: |
1264 | 82463074 | Iustin Pop | _ThrowError("drbd%d: children not ready during AddChildren", self.minor) |
1265 | b00b95dd | Iustin Pop | backend.Open() |
1266 | b00b95dd | Iustin Pop | meta.Open() |
1267 | 9c793cfb | Iustin Pop | self._CheckMetaSize(meta.dev_path)
|
1268 | b00b95dd | Iustin Pop | self._InitMeta(self._FindUnusedMinor(), meta.dev_path) |
1269 | b00b95dd | Iustin Pop | |
1270 | f069addf | Iustin Pop | self._AssembleLocal(self.minor, backend.dev_path, meta.dev_path, self.size) |
1271 | b00b95dd | Iustin Pop | self._children = devices
|
1272 | b00b95dd | Iustin Pop | |
1273 | b00b95dd | Iustin Pop | def RemoveChildren(self, devices): |
1274 | b00b95dd | Iustin Pop | """Detach the drbd device from local storage.
|
1275 | b00b95dd | Iustin Pop |
|
1276 | b00b95dd | Iustin Pop | """
|
1277 | b00b95dd | Iustin Pop | if self.minor is None: |
1278 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't attach to drbd8 during RemoveChildren",
|
1279 | 82463074 | Iustin Pop | self._aminor)
|
1280 | 03ece5f3 | Iustin Pop | # early return if we don't actually have backing storage
|
1281 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1282 | 03ece5f3 | Iustin Pop | if "local_dev" not in info: |
1283 | 03ece5f3 | Iustin Pop | return
|
1284 | b00b95dd | Iustin Pop | if len(self._children) != 2: |
1285 | 82463074 | Iustin Pop | _ThrowError("drbd%d: we don't have two children: %s", self.minor, |
1286 | 82463074 | Iustin Pop | self._children)
|
1287 | e739bd57 | Iustin Pop | if self._children.count(None) == 2: # we don't actually have children :) |
1288 | 82463074 | Iustin Pop | logging.warning("drbd%d: requested detach while detached", self.minor) |
1289 | e739bd57 | Iustin Pop | return
|
1290 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1291 | 82463074 | Iustin Pop | _ThrowError("drbd%d: we need two children in RemoveChildren", self.minor) |
1292 | e739bd57 | Iustin Pop | for child, dev in zip(self._children, devices): |
1293 | e739bd57 | Iustin Pop | if dev != child.dev_path:
|
1294 | 82463074 | Iustin Pop | _ThrowError("drbd%d: mismatch in local storage (%s != %s) in"
|
1295 | 82463074 | Iustin Pop | " RemoveChildren", self.minor, dev, child.dev_path) |
1296 | b00b95dd | Iustin Pop | |
1297 | 1063abd1 | Iustin Pop | self._ShutdownLocal(self.minor) |
1298 | b00b95dd | Iustin Pop | self._children = []
|
1299 | b00b95dd | Iustin Pop | |
1300 | 7d585316 | Iustin Pop | @classmethod
|
1301 | 7d585316 | Iustin Pop | def _SetMinorSyncSpeed(cls, minor, kbytes): |
1302 | a2cfdea2 | Iustin Pop | """Set the speed of the DRBD syncer.
|
1303 | a2cfdea2 | Iustin Pop |
|
1304 | 7d585316 | Iustin Pop | This is the low-level implementation.
|
1305 | 7d585316 | Iustin Pop |
|
1306 | 7d585316 | Iustin Pop | @type minor: int
|
1307 | 7d585316 | Iustin Pop | @param minor: the drbd minor whose settings we change
|
1308 | 7d585316 | Iustin Pop | @type kbytes: int
|
1309 | 7d585316 | Iustin Pop | @param kbytes: the speed in kbytes/second
|
1310 | 7d585316 | Iustin Pop | @rtype: boolean
|
1311 | 7d585316 | Iustin Pop | @return: the success of the operation
|
1312 | 7d585316 | Iustin Pop |
|
1313 | a2cfdea2 | Iustin Pop | """
|
1314 | 7d585316 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "syncer", |
1315 | 7d585316 | Iustin Pop | "-r", "%d" % kbytes, "--create-device"]) |
1316 | a2cfdea2 | Iustin Pop | if result.failed:
|
1317 | 468c5f77 | Iustin Pop | logging.error("Can't change syncer rate: %s - %s",
|
1318 | 468c5f77 | Iustin Pop | result.fail_reason, result.output) |
1319 | 7d585316 | Iustin Pop | return not result.failed |
1320 | 7d585316 | Iustin Pop | |
1321 | 7d585316 | Iustin Pop | def SetSyncSpeed(self, kbytes): |
1322 | 7d585316 | Iustin Pop | """Set the speed of the DRBD syncer.
|
1323 | 7d585316 | Iustin Pop |
|
1324 | 7d585316 | Iustin Pop | @type kbytes: int
|
1325 | 7d585316 | Iustin Pop | @param kbytes: the speed in kbytes/second
|
1326 | 7d585316 | Iustin Pop | @rtype: boolean
|
1327 | 7d585316 | Iustin Pop | @return: the success of the operation
|
1328 | 7d585316 | Iustin Pop |
|
1329 | 7d585316 | Iustin Pop | """
|
1330 | 7d585316 | Iustin Pop | if self.minor is None: |
1331 | 7d585316 | Iustin Pop | logging.info("Not attached during SetSyncSpeed")
|
1332 | 7d585316 | Iustin Pop | return False |
1333 | 7d585316 | Iustin Pop | children_result = super(DRBD8, self).SetSyncSpeed(kbytes) |
1334 | 7d585316 | Iustin Pop | return self._SetMinorSyncSpeed(self.minor, kbytes) and children_result |
1335 | a2cfdea2 | Iustin Pop | |
1336 | 6b90c22e | Iustin Pop | def GetProcStatus(self): |
1337 | 6b90c22e | Iustin Pop | """Return device data from /proc.
|
1338 | 6b90c22e | Iustin Pop |
|
1339 | 6b90c22e | Iustin Pop | """
|
1340 | 6b90c22e | Iustin Pop | if self.minor is None: |
1341 | 82463074 | Iustin Pop | _ThrowError("drbd%d: GetStats() called while not attached", self._aminor) |
1342 | 6b90c22e | Iustin Pop | proc_info = self._MassageProcData(self._GetProcData()) |
1343 | 6b90c22e | Iustin Pop | if self.minor not in proc_info: |
1344 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't find myself in /proc", self.minor) |
1345 | 6b90c22e | Iustin Pop | return DRBD8Status(proc_info[self.minor]) |
1346 | 6b90c22e | Iustin Pop | |
1347 | a2cfdea2 | Iustin Pop | def GetSyncStatus(self): |
1348 | a2cfdea2 | Iustin Pop | """Returns the sync status of the device.
|
1349 | a2cfdea2 | Iustin Pop |
|
1350 | a2cfdea2 | Iustin Pop |
|
1351 | a2cfdea2 | Iustin Pop | If sync_percent is None, it means all is ok
|
1352 | 5bbd3f7f | Michael Hanselmann | If estimated_time is None, it means we can't estimate
|
1353 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
|
1354 | 0834c866 | Iustin Pop |
|
1355 | 0834c866 | Iustin Pop |
|
1356 | 0834c866 | Iustin Pop | We set the is_degraded parameter to True on two conditions:
|
1357 | 0834c866 | Iustin Pop | network not connected or local disk missing.
|
1358 | 0834c866 | Iustin Pop |
|
1359 | 5bbd3f7f | Michael Hanselmann | We compute the ldisk parameter based on whether we have a local
|
1360 | 0834c866 | Iustin Pop | disk or not.
|
1361 | a2cfdea2 | Iustin Pop |
|
1362 | 96acbc09 | Michael Hanselmann | @rtype: objects.BlockDevStatus
|
1363 | c41eea6e | Iustin Pop |
|
1364 | a2cfdea2 | Iustin Pop | """
|
1365 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1366 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't Attach() in GetSyncStatus", self._aminor) |
1367 | 96acbc09 | Michael Hanselmann | |
1368 | 6b90c22e | Iustin Pop | stats = self.GetProcStatus()
|
1369 | f208978a | Michael Hanselmann | is_degraded = not stats.is_connected or not stats.is_disk_uptodate |
1370 | f208978a | Michael Hanselmann | |
1371 | f208978a | Michael Hanselmann | if stats.is_disk_uptodate:
|
1372 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_OKAY |
1373 | f208978a | Michael Hanselmann | elif stats.is_diskless:
|
1374 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_FAULTY |
1375 | f208978a | Michael Hanselmann | else:
|
1376 | f208978a | Michael Hanselmann | ldisk_status = constants.LDS_UNKNOWN |
1377 | 96acbc09 | Michael Hanselmann | |
1378 | 96acbc09 | Michael Hanselmann | return objects.BlockDevStatus(dev_path=self.dev_path, |
1379 | 96acbc09 | Michael Hanselmann | major=self.major,
|
1380 | 96acbc09 | Michael Hanselmann | minor=self.minor,
|
1381 | 96acbc09 | Michael Hanselmann | sync_percent=stats.sync_percent, |
1382 | 96acbc09 | Michael Hanselmann | estimated_time=stats.est_time, |
1383 | f208978a | Michael Hanselmann | is_degraded=is_degraded, |
1384 | f208978a | Michael Hanselmann | ldisk_status=ldisk_status) |
1385 | a2cfdea2 | Iustin Pop | |
1386 | a2cfdea2 | Iustin Pop | def Open(self, force=False): |
1387 | a2cfdea2 | Iustin Pop | """Make the local state primary.
|
1388 | a2cfdea2 | Iustin Pop |
|
1389 | f860ff4e | Guido Trotter | If the 'force' parameter is given, the '-o' option is passed to
|
1390 | f860ff4e | Guido Trotter | drbdsetup. Since this is a potentially dangerous operation, the
|
1391 | a2cfdea2 | Iustin Pop | force flag should be only given after creation, when it actually
|
1392 | f860ff4e | Guido Trotter | is mandatory.
|
1393 | a2cfdea2 | Iustin Pop |
|
1394 | a2cfdea2 | Iustin Pop | """
|
1395 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1396 | 468c5f77 | Iustin Pop | logging.error("DRBD cannot attach to a device during open")
|
1397 | a2cfdea2 | Iustin Pop | return False |
1398 | a2cfdea2 | Iustin Pop | cmd = ["drbdsetup", self.dev_path, "primary"] |
1399 | a2cfdea2 | Iustin Pop | if force:
|
1400 | a2cfdea2 | Iustin Pop | cmd.append("-o")
|
1401 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(cmd) |
1402 | a2cfdea2 | Iustin Pop | if result.failed:
|
1403 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't make drbd device primary: %s", self.minor, |
1404 | 82463074 | Iustin Pop | result.output) |
1405 | a2cfdea2 | Iustin Pop | |
1406 | a2cfdea2 | Iustin Pop | def Close(self): |
1407 | a2cfdea2 | Iustin Pop | """Make the local state secondary.
|
1408 | a2cfdea2 | Iustin Pop |
|
1409 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1410 | a2cfdea2 | Iustin Pop |
|
1411 | a2cfdea2 | Iustin Pop | """
|
1412 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1413 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't Attach() in Close()", self._aminor) |
1414 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
1415 | a2cfdea2 | Iustin Pop | if result.failed:
|
1416 | 82463074 | Iustin Pop | _ThrowError("drbd%d: can't switch drbd device to secondary: %s",
|
1417 | 82463074 | Iustin Pop | self.minor, result.output)
|
1418 | a2cfdea2 | Iustin Pop | |
1419 | cf8df3f3 | Iustin Pop | def DisconnectNet(self): |
1420 | cf8df3f3 | Iustin Pop | """Removes network configuration.
|
1421 | cf8df3f3 | Iustin Pop |
|
1422 | cf8df3f3 | Iustin Pop | This method shutdowns the network side of the device.
|
1423 | cf8df3f3 | Iustin Pop |
|
1424 | cf8df3f3 | Iustin Pop | The method will wait up to a hardcoded timeout for the device to
|
1425 | cf8df3f3 | Iustin Pop | go into standalone after the 'disconnect' command before
|
1426 | cf8df3f3 | Iustin Pop | re-configuring it, as sometimes it takes a while for the
|
1427 | cf8df3f3 | Iustin Pop | disconnect to actually propagate and thus we might issue a 'net'
|
1428 | cf8df3f3 | Iustin Pop | command while the device is still connected. If the device will
|
1429 | cf8df3f3 | Iustin Pop | still be attached to the network and we time out, we raise an
|
1430 | cf8df3f3 | Iustin Pop | exception.
|
1431 | cf8df3f3 | Iustin Pop |
|
1432 | cf8df3f3 | Iustin Pop | """
|
1433 | cf8df3f3 | Iustin Pop | if self.minor is None: |
1434 | 82463074 | Iustin Pop | _ThrowError("drbd%d: disk not attached in re-attach net", self._aminor) |
1435 | cf8df3f3 | Iustin Pop | |
1436 | cf8df3f3 | Iustin Pop | if None in (self._lhost, self._lport, self._rhost, self._rport): |
1437 | 82463074 | Iustin Pop | _ThrowError("drbd%d: DRBD disk missing network info in"
|
1438 | 82463074 | Iustin Pop | " DisconnectNet()", self.minor) |
1439 | cf8df3f3 | Iustin Pop | |
1440 | def8e2f6 | Michael Hanselmann | class _DisconnectStatus: |
1441 | def8e2f6 | Michael Hanselmann | def __init__(self, ever_disconnected): |
1442 | def8e2f6 | Michael Hanselmann | self.ever_disconnected = ever_disconnected
|
1443 | cf8df3f3 | Iustin Pop | |
1444 | def8e2f6 | Michael Hanselmann | dstatus = _DisconnectStatus(_IgnoreError(self._ShutdownNet, self.minor)) |
1445 | def8e2f6 | Michael Hanselmann | |
1446 | def8e2f6 | Michael Hanselmann | def _WaitForDisconnect(): |
1447 | def8e2f6 | Michael Hanselmann | if self.GetProcStatus().is_standalone: |
1448 | def8e2f6 | Michael Hanselmann | return
|
1449 | def8e2f6 | Michael Hanselmann | |
1450 | def8e2f6 | Michael Hanselmann | # retry the disconnect, it seems possible that due to a well-time
|
1451 | def8e2f6 | Michael Hanselmann | # disconnect on the peer, my disconnect command might be ignored and
|
1452 | def8e2f6 | Michael Hanselmann | # forgotten
|
1453 | def8e2f6 | Michael Hanselmann | dstatus.ever_disconnected = \ |
1454 | def8e2f6 | Michael Hanselmann | _IgnoreError(self._ShutdownNet, self.minor) or dstatus.ever_disconnected |
1455 | def8e2f6 | Michael Hanselmann | |
1456 | def8e2f6 | Michael Hanselmann | raise utils.RetryAgain()
|
1457 | def8e2f6 | Michael Hanselmann | |
1458 | def8e2f6 | Michael Hanselmann | # Keep start time
|
1459 | def8e2f6 | Michael Hanselmann | start_time = time.time() |
1460 | def8e2f6 | Michael Hanselmann | |
1461 | def8e2f6 | Michael Hanselmann | try:
|
1462 | def8e2f6 | Michael Hanselmann | # Start delay at 100 milliseconds and grow up to 2 seconds
|
1463 | def8e2f6 | Michael Hanselmann | utils.Retry(_WaitForDisconnect, (0.1, 1.5, 2.0), |
1464 | def8e2f6 | Michael Hanselmann | self._NET_RECONFIG_TIMEOUT)
|
1465 | def8e2f6 | Michael Hanselmann | except utils.RetryTimeout:
|
1466 | def8e2f6 | Michael Hanselmann | if dstatus.ever_disconnected:
|
1467 | 82463074 | Iustin Pop | msg = ("drbd%d: device did not react to the"
|
1468 | cf8df3f3 | Iustin Pop | " 'disconnect' command in a timely manner")
|
1469 | cf8df3f3 | Iustin Pop | else:
|
1470 | 82463074 | Iustin Pop | msg = "drbd%d: can't shutdown network, even after multiple retries"
|
1471 | def8e2f6 | Michael Hanselmann | |
1472 | 82463074 | Iustin Pop | _ThrowError(msg, self.minor)
|
1473 | cf8df3f3 | Iustin Pop | |
1474 | def8e2f6 | Michael Hanselmann | reconfig_time = time.time() - start_time |
1475 | def8e2f6 | Michael Hanselmann | if reconfig_time > (self._NET_RECONFIG_TIMEOUT * 0.25): |
1476 | 82463074 | Iustin Pop | logging.info("drbd%d: DisconnectNet: detach took %.3f seconds",
|
1477 | 82463074 | Iustin Pop | self.minor, reconfig_time)
|
1478 | cf8df3f3 | Iustin Pop | |
1479 | cf8df3f3 | Iustin Pop | def AttachNet(self, multimaster): |
1480 | cf8df3f3 | Iustin Pop | """Reconnects the network.
|
1481 | cf8df3f3 | Iustin Pop |
|
1482 | cf8df3f3 | Iustin Pop | This method connects the network side of the device with a
|
1483 | cf8df3f3 | Iustin Pop | specified multi-master flag. The device needs to be 'Standalone'
|
1484 | cf8df3f3 | Iustin Pop | but have valid network configuration data.
|
1485 | cf8df3f3 | Iustin Pop |
|
1486 | cf8df3f3 | Iustin Pop | Args:
|
1487 | cf8df3f3 | Iustin Pop | - multimaster: init the network in dual-primary mode
|
1488 | cf8df3f3 | Iustin Pop |
|
1489 | cf8df3f3 | Iustin Pop | """
|
1490 | cf8df3f3 | Iustin Pop | if self.minor is None: |
1491 | 82463074 | Iustin Pop | _ThrowError("drbd%d: device not attached in AttachNet", self._aminor) |
1492 | cf8df3f3 | Iustin Pop | |
1493 | cf8df3f3 | Iustin Pop | if None in (self._lhost, self._lport, self._rhost, self._rport): |
1494 | 82463074 | Iustin Pop | _ThrowError("drbd%d: missing network info in AttachNet()", self.minor) |
1495 | cf8df3f3 | Iustin Pop | |
1496 | cf8df3f3 | Iustin Pop | status = self.GetProcStatus()
|
1497 | cf8df3f3 | Iustin Pop | |
1498 | cf8df3f3 | Iustin Pop | if not status.is_standalone: |
1499 | 82463074 | Iustin Pop | _ThrowError("drbd%d: device is not standalone in AttachNet", self.minor) |
1500 | cf8df3f3 | Iustin Pop | |
1501 | 1063abd1 | Iustin Pop | self._AssembleNet(self.minor, |
1502 | 1063abd1 | Iustin Pop | (self._lhost, self._lport, self._rhost, self._rport), |
1503 | 1063abd1 | Iustin Pop | constants.DRBD_NET_PROTOCOL, dual_pri=multimaster, |
1504 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1505 | cf8df3f3 | Iustin Pop | |
1506 | a2cfdea2 | Iustin Pop | def Attach(self): |
1507 | 2d0c8319 | Iustin Pop | """Check if our minor is configured.
|
1508 | 2d0c8319 | Iustin Pop |
|
1509 | 2d0c8319 | Iustin Pop | This doesn't do any device configurations - it only checks if the
|
1510 | 2d0c8319 | Iustin Pop | minor is in a state different from Unconfigured.
|
1511 | 2d0c8319 | Iustin Pop |
|
1512 | 2d0c8319 | Iustin Pop | Note that this function will not change the state of the system in
|
1513 | 2d0c8319 | Iustin Pop | any way (except in case of side-effects caused by reading from
|
1514 | 2d0c8319 | Iustin Pop | /proc).
|
1515 | 2d0c8319 | Iustin Pop |
|
1516 | 2d0c8319 | Iustin Pop | """
|
1517 | 6d2e83d5 | Iustin Pop | used_devs = self.GetUsedDevs()
|
1518 | 2d0c8319 | Iustin Pop | if self._aminor in used_devs: |
1519 | 2d0c8319 | Iustin Pop | minor = self._aminor
|
1520 | 2d0c8319 | Iustin Pop | else:
|
1521 | 2d0c8319 | Iustin Pop | minor = None
|
1522 | 2d0c8319 | Iustin Pop | |
1523 | 2d0c8319 | Iustin Pop | self._SetFromMinor(minor)
|
1524 | 2d0c8319 | Iustin Pop | return minor is not None |
1525 | 2d0c8319 | Iustin Pop | |
1526 | 2d0c8319 | Iustin Pop | def Assemble(self): |
1527 | 2d0c8319 | Iustin Pop | """Assemble the drbd.
|
1528 | 2d0c8319 | Iustin Pop |
|
1529 | 2d0c8319 | Iustin Pop | Method:
|
1530 | 2d0c8319 | Iustin Pop | - if we have a configured device, we try to ensure that it matches
|
1531 | 2d0c8319 | Iustin Pop | our config
|
1532 | 2d0c8319 | Iustin Pop | - if not, we create it from zero
|
1533 | 2d0c8319 | Iustin Pop |
|
1534 | 2d0c8319 | Iustin Pop | """
|
1535 | 1063abd1 | Iustin Pop | super(DRBD8, self).Assemble() |
1536 | 2d0c8319 | Iustin Pop | |
1537 | 2d0c8319 | Iustin Pop | self.Attach()
|
1538 | 2d0c8319 | Iustin Pop | if self.minor is None: |
1539 | 2d0c8319 | Iustin Pop | # local device completely unconfigured
|
1540 | 1063abd1 | Iustin Pop | self._FastAssemble()
|
1541 | 2d0c8319 | Iustin Pop | else:
|
1542 | 2d0c8319 | Iustin Pop | # we have to recheck the local and network status and try to fix
|
1543 | 2d0c8319 | Iustin Pop | # the device
|
1544 | 1063abd1 | Iustin Pop | self._SlowAssemble()
|
1545 | 2d0c8319 | Iustin Pop | |
1546 | 2d0c8319 | Iustin Pop | def _SlowAssemble(self): |
1547 | 2d0c8319 | Iustin Pop | """Assembles the DRBD device from a (partially) configured device.
|
1548 | a2cfdea2 | Iustin Pop |
|
1549 | a2cfdea2 | Iustin Pop | In case of partially attached (local device matches but no network
|
1550 | a2cfdea2 | Iustin Pop | setup), we perform the network attach. If successful, we re-test
|
1551 | a2cfdea2 | Iustin Pop | the attach if can return success.
|
1552 | a2cfdea2 | Iustin Pop |
|
1553 | a2cfdea2 | Iustin Pop | """
|
1554 | 1063abd1 | Iustin Pop | net_data = (self._lhost, self._lport, self._rhost, self._rport) |
1555 | a1578d63 | Iustin Pop | for minor in (self._aminor,): |
1556 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(minor)) |
1557 | a2cfdea2 | Iustin Pop | match_l = self._MatchesLocal(info)
|
1558 | a2cfdea2 | Iustin Pop | match_r = self._MatchesNet(info)
|
1559 | 1063abd1 | Iustin Pop | |
1560 | a2cfdea2 | Iustin Pop | if match_l and match_r: |
1561 | 1063abd1 | Iustin Pop | # everything matches
|
1562 | a2cfdea2 | Iustin Pop | break
|
1563 | 1063abd1 | Iustin Pop | |
1564 | a2cfdea2 | Iustin Pop | if match_l and not match_r and "local_addr" not in info: |
1565 | 1063abd1 | Iustin Pop | # disk matches, but not attached to network, attach and recheck
|
1566 | 1063abd1 | Iustin Pop | self._AssembleNet(minor, net_data, constants.DRBD_NET_PROTOCOL,
|
1567 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1568 | 1063abd1 | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1569 | 1063abd1 | Iustin Pop | break
|
1570 | 1063abd1 | Iustin Pop | else:
|
1571 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: network attach successful, but 'drbdsetup"
|
1572 | 1063abd1 | Iustin Pop | " show' disagrees", minor)
|
1573 | 1063abd1 | Iustin Pop | |
1574 | fc1dc9d7 | Iustin Pop | if match_r and "local_dev" not in info: |
1575 | 1063abd1 | Iustin Pop | # no local disk, but network attached and it matches
|
1576 | 1063abd1 | Iustin Pop | self._AssembleLocal(minor, self._children[0].dev_path, |
1577 | f069addf | Iustin Pop | self._children[1].dev_path, self.size) |
1578 | 1063abd1 | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1579 | 1063abd1 | Iustin Pop | break
|
1580 | 1063abd1 | Iustin Pop | else:
|
1581 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: disk attach successful, but 'drbdsetup"
|
1582 | 1063abd1 | Iustin Pop | " show' disagrees", minor)
|
1583 | bf25af3b | Iustin Pop | |
1584 | bf25af3b | Iustin Pop | # this case must be considered only if we actually have local
|
1585 | bf25af3b | Iustin Pop | # storage, i.e. not in diskless mode, because all diskless
|
1586 | bf25af3b | Iustin Pop | # devices are equal from the point of view of local
|
1587 | bf25af3b | Iustin Pop | # configuration
|
1588 | bf25af3b | Iustin Pop | if (match_l and "local_dev" in info and |
1589 | bf25af3b | Iustin Pop | not match_r and "local_addr" in info): |
1590 | 9cdbe77f | Iustin Pop | # strange case - the device network part points to somewhere
|
1591 | 9cdbe77f | Iustin Pop | # else, even though its local storage is ours; as we own the
|
1592 | 9cdbe77f | Iustin Pop | # drbd space, we try to disconnect from the remote peer and
|
1593 | 9cdbe77f | Iustin Pop | # reconnect to our correct one
|
1594 | 1063abd1 | Iustin Pop | try:
|
1595 | 1063abd1 | Iustin Pop | self._ShutdownNet(minor)
|
1596 | 1063abd1 | Iustin Pop | except errors.BlockDeviceError, err:
|
1597 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: device has correct local storage, wrong"
|
1598 | 33bc6f01 | Iustin Pop | " remote peer and is unable to disconnect in order"
|
1599 | 33bc6f01 | Iustin Pop | " to attach to the correct peer: %s", minor, str(err)) |
1600 | 9cdbe77f | Iustin Pop | # note: _AssembleNet also handles the case when we don't want
|
1601 | 9cdbe77f | Iustin Pop | # local storage (i.e. one or more of the _[lr](host|port) is
|
1602 | 9cdbe77f | Iustin Pop | # None)
|
1603 | 1063abd1 | Iustin Pop | self._AssembleNet(minor, net_data, constants.DRBD_NET_PROTOCOL,
|
1604 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1605 | 1063abd1 | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1606 | 9cdbe77f | Iustin Pop | break
|
1607 | 1063abd1 | Iustin Pop | else:
|
1608 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: network attach successful, but 'drbdsetup"
|
1609 | 1063abd1 | Iustin Pop | " show' disagrees", minor)
|
1610 | 9cdbe77f | Iustin Pop | |
1611 | a2cfdea2 | Iustin Pop | else:
|
1612 | a2cfdea2 | Iustin Pop | minor = None
|
1613 | a2cfdea2 | Iustin Pop | |
1614 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1615 | 1063abd1 | Iustin Pop | if minor is None: |
1616 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: cannot activate, unknown or unhandled reason",
|
1617 | 1063abd1 | Iustin Pop | self._aminor)
|
1618 | a2cfdea2 | Iustin Pop | |
1619 | 2d0c8319 | Iustin Pop | def _FastAssemble(self): |
1620 | 2d0c8319 | Iustin Pop | """Assemble the drbd device from zero.
|
1621 | a2cfdea2 | Iustin Pop |
|
1622 | 2d0c8319 | Iustin Pop | This is run when in Assemble we detect our minor is unused.
|
1623 | a2cfdea2 | Iustin Pop |
|
1624 | a2cfdea2 | Iustin Pop | """
|
1625 | a1578d63 | Iustin Pop | minor = self._aminor
|
1626 | fc1dc9d7 | Iustin Pop | if self._children and self._children[0] and self._children[1]: |
1627 | 1063abd1 | Iustin Pop | self._AssembleLocal(minor, self._children[0].dev_path, |
1628 | f069addf | Iustin Pop | self._children[1].dev_path, self.size) |
1629 | a2cfdea2 | Iustin Pop | if self._lhost and self._lport and self._rhost and self._rport: |
1630 | 1063abd1 | Iustin Pop | self._AssembleNet(minor,
|
1631 | 1063abd1 | Iustin Pop | (self._lhost, self._lport, self._rhost, self._rport), |
1632 | 1063abd1 | Iustin Pop | constants.DRBD_NET_PROTOCOL, |
1633 | 1063abd1 | Iustin Pop | hmac=constants.DRBD_HMAC_ALG, secret=self._secret)
|
1634 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1635 | a2cfdea2 | Iustin Pop | |
1636 | a2cfdea2 | Iustin Pop | @classmethod
|
1637 | b00b95dd | Iustin Pop | def _ShutdownLocal(cls, minor): |
1638 | b00b95dd | Iustin Pop | """Detach from the local device.
|
1639 | b00b95dd | Iustin Pop |
|
1640 | b00b95dd | Iustin Pop | I/Os will continue to be served from the remote device. If we
|
1641 | b00b95dd | Iustin Pop | don't have a remote device, this operation will fail.
|
1642 | b00b95dd | Iustin Pop |
|
1643 | b00b95dd | Iustin Pop | """
|
1644 | b00b95dd | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
1645 | b00b95dd | Iustin Pop | if result.failed:
|
1646 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't detach local disk: %s", minor, result.output)
|
1647 | b00b95dd | Iustin Pop | |
1648 | b00b95dd | Iustin Pop | @classmethod
|
1649 | f3e513ad | Iustin Pop | def _ShutdownNet(cls, minor): |
1650 | f3e513ad | Iustin Pop | """Disconnect from the remote peer.
|
1651 | f3e513ad | Iustin Pop |
|
1652 | f3e513ad | Iustin Pop | This fails if we don't have a local device.
|
1653 | f3e513ad | Iustin Pop |
|
1654 | f3e513ad | Iustin Pop | """
|
1655 | f3e513ad | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
1656 | a8459f1c | Iustin Pop | if result.failed:
|
1657 | 1063abd1 | Iustin Pop | _ThrowError("drbd%d: can't shutdown network: %s", minor, result.output)
|
1658 | f3e513ad | Iustin Pop | |
1659 | f3e513ad | Iustin Pop | @classmethod
|
1660 | a2cfdea2 | Iustin Pop | def _ShutdownAll(cls, minor): |
1661 | a2cfdea2 | Iustin Pop | """Deactivate the device.
|
1662 | a2cfdea2 | Iustin Pop |
|
1663 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1664 | a2cfdea2 | Iustin Pop |
|
1665 | a2cfdea2 | Iustin Pop | """
|
1666 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "down"]) |
1667 | a2cfdea2 | Iustin Pop | if result.failed:
|
1668 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: can't shutdown drbd device: %s",
|
1669 | 33bc6f01 | Iustin Pop | minor, result.output) |
1670 | a2cfdea2 | Iustin Pop | |
1671 | a2cfdea2 | Iustin Pop | def Shutdown(self): |
1672 | a2cfdea2 | Iustin Pop | """Shutdown the DRBD device.
|
1673 | a2cfdea2 | Iustin Pop |
|
1674 | a2cfdea2 | Iustin Pop | """
|
1675 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1676 | 746f7476 | Iustin Pop | logging.info("drbd%d: not attached during Shutdown()", self._aminor) |
1677 | 746f7476 | Iustin Pop | return
|
1678 | 746f7476 | Iustin Pop | minor = self.minor
|
1679 | a2cfdea2 | Iustin Pop | self.minor = None |
1680 | a2cfdea2 | Iustin Pop | self.dev_path = None |
1681 | 746f7476 | Iustin Pop | self._ShutdownAll(minor)
|
1682 | a2cfdea2 | Iustin Pop | |
1683 | a2cfdea2 | Iustin Pop | def Remove(self): |
1684 | a2cfdea2 | Iustin Pop | """Stub remove for DRBD devices.
|
1685 | a2cfdea2 | Iustin Pop |
|
1686 | a2cfdea2 | Iustin Pop | """
|
1687 | 0c6c04ec | Iustin Pop | self.Shutdown()
|
1688 | a2cfdea2 | Iustin Pop | |
1689 | a2cfdea2 | Iustin Pop | @classmethod
|
1690 | a2cfdea2 | Iustin Pop | def Create(cls, unique_id, children, size): |
1691 | a2cfdea2 | Iustin Pop | """Create a new DRBD8 device.
|
1692 | a2cfdea2 | Iustin Pop |
|
1693 | a2cfdea2 | Iustin Pop | Since DRBD devices are not created per se, just assembled, this
|
1694 | a2cfdea2 | Iustin Pop | function only initializes the metadata.
|
1695 | a2cfdea2 | Iustin Pop |
|
1696 | a2cfdea2 | Iustin Pop | """
|
1697 | a2cfdea2 | Iustin Pop | if len(children) != 2: |
1698 | a2cfdea2 | Iustin Pop | raise errors.ProgrammerError("Invalid setup for the drbd device") |
1699 | 767d52d3 | Iustin Pop | # check that the minor is unused
|
1700 | 767d52d3 | Iustin Pop | aminor = unique_id[4]
|
1701 | 767d52d3 | Iustin Pop | proc_info = cls._MassageProcData(cls._GetProcData()) |
1702 | 767d52d3 | Iustin Pop | if aminor in proc_info: |
1703 | 767d52d3 | Iustin Pop | status = DRBD8Status(proc_info[aminor]) |
1704 | 767d52d3 | Iustin Pop | in_use = status.is_in_use |
1705 | 767d52d3 | Iustin Pop | else:
|
1706 | 767d52d3 | Iustin Pop | in_use = False
|
1707 | 767d52d3 | Iustin Pop | if in_use:
|
1708 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: minor is already in use at Create() time", aminor)
|
1709 | a2cfdea2 | Iustin Pop | meta = children[1]
|
1710 | a2cfdea2 | Iustin Pop | meta.Assemble() |
1711 | a2cfdea2 | Iustin Pop | if not meta.Attach(): |
1712 | 33bc6f01 | Iustin Pop | _ThrowError("drbd%d: can't attach to meta device '%s'",
|
1713 | 33bc6f01 | Iustin Pop | aminor, meta) |
1714 | 9c793cfb | Iustin Pop | cls._CheckMetaSize(meta.dev_path) |
1715 | 3b559640 | Iustin Pop | cls._InitMeta(aminor, meta.dev_path) |
1716 | 464f8daf | Iustin Pop | return cls(unique_id, children, size)
|
1717 | a2cfdea2 | Iustin Pop | |
1718 | 1005d816 | Iustin Pop | def Grow(self, amount): |
1719 | 1005d816 | Iustin Pop | """Resize the DRBD device and its backing storage.
|
1720 | 1005d816 | Iustin Pop |
|
1721 | 1005d816 | Iustin Pop | """
|
1722 | 1005d816 | Iustin Pop | if self.minor is None: |
1723 | 82463074 | Iustin Pop | _ThrowError("drbd%d: Grow called while not attached", self._aminor) |
1724 | 1005d816 | Iustin Pop | if len(self._children) != 2 or None in self._children: |
1725 | 82463074 | Iustin Pop | _ThrowError("drbd%d: cannot grow diskless device", self.minor) |
1726 | 1005d816 | Iustin Pop | self._children[0].Grow(amount) |
1727 | 38256320 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "resize", "-s", |
1728 | 38256320 | Iustin Pop | "%dm" % (self.size + amount)]) |
1729 | 1005d816 | Iustin Pop | if result.failed:
|
1730 | 82463074 | Iustin Pop | _ThrowError("drbd%d: resize failed: %s", self.minor, result.output) |
1731 | 1005d816 | Iustin Pop | |
1732 | a8083063 | Iustin Pop | |
1733 | 6f695a2e | Manuel Franceschini | class FileStorage(BlockDev): |
1734 | 6f695a2e | Manuel Franceschini | """File device.
|
1735 | abdf0113 | Iustin Pop |
|
1736 | 6f695a2e | Manuel Franceschini | This class represents the a file storage backend device.
|
1737 | 6f695a2e | Manuel Franceschini |
|
1738 | 6f695a2e | Manuel Franceschini | The unique_id for the file device is a (file_driver, file_path) tuple.
|
1739 | abdf0113 | Iustin Pop |
|
1740 | 6f695a2e | Manuel Franceschini | """
|
1741 | 464f8daf | Iustin Pop | def __init__(self, unique_id, children, size): |
1742 | 6f695a2e | Manuel Franceschini | """Initalizes a file device backend.
|
1743 | 6f695a2e | Manuel Franceschini |
|
1744 | 6f695a2e | Manuel Franceschini | """
|
1745 | 6f695a2e | Manuel Franceschini | if children:
|
1746 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("Invalid setup for file device") |
1747 | 464f8daf | Iustin Pop | super(FileStorage, self).__init__(unique_id, children, size) |
1748 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1749 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1750 | 6f695a2e | Manuel Franceschini | self.driver = unique_id[0] |
1751 | 6f695a2e | Manuel Franceschini | self.dev_path = unique_id[1] |
1752 | ecb091e3 | Iustin Pop | self.Attach()
|
1753 | 6f695a2e | Manuel Franceschini | |
1754 | 6f695a2e | Manuel Franceschini | def Assemble(self): |
1755 | 6f695a2e | Manuel Franceschini | """Assemble the device.
|
1756 | 6f695a2e | Manuel Franceschini |
|
1757 | 6f695a2e | Manuel Franceschini | Checks whether the file device exists, raises BlockDeviceError otherwise.
|
1758 | 6f695a2e | Manuel Franceschini |
|
1759 | 6f695a2e | Manuel Franceschini | """
|
1760 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
1761 | 1063abd1 | Iustin Pop | _ThrowError("File device '%s' does not exist" % self.dev_path) |
1762 | 6f695a2e | Manuel Franceschini | |
1763 | 6f695a2e | Manuel Franceschini | def Shutdown(self): |
1764 | 6f695a2e | Manuel Franceschini | """Shutdown the device.
|
1765 | 6f695a2e | Manuel Franceschini |
|
1766 | 5bbd3f7f | Michael Hanselmann | This is a no-op for the file type, as we don't deactivate
|
1767 | 6f695a2e | Manuel Franceschini | the file on shutdown.
|
1768 | 6f695a2e | Manuel Franceschini |
|
1769 | 6f695a2e | Manuel Franceschini | """
|
1770 | 746f7476 | Iustin Pop | pass
|
1771 | 6f695a2e | Manuel Franceschini | |
1772 | 6f695a2e | Manuel Franceschini | def Open(self, force=False): |
1773 | 6f695a2e | Manuel Franceschini | """Make the device ready for I/O.
|
1774 | 6f695a2e | Manuel Franceschini |
|
1775 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
1776 | 6f695a2e | Manuel Franceschini |
|
1777 | 6f695a2e | Manuel Franceschini | """
|
1778 | 6f695a2e | Manuel Franceschini | pass
|
1779 | 6f695a2e | Manuel Franceschini | |
1780 | 6f695a2e | Manuel Franceschini | def Close(self): |
1781 | 6f695a2e | Manuel Franceschini | """Notifies that the device will no longer be used for I/O.
|
1782 | 6f695a2e | Manuel Franceschini |
|
1783 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
1784 | 6f695a2e | Manuel Franceschini |
|
1785 | 6f695a2e | Manuel Franceschini | """
|
1786 | 6f695a2e | Manuel Franceschini | pass
|
1787 | 6f695a2e | Manuel Franceschini | |
1788 | 6f695a2e | Manuel Franceschini | def Remove(self): |
1789 | 6f695a2e | Manuel Franceschini | """Remove the file backing the block device.
|
1790 | 6f695a2e | Manuel Franceschini |
|
1791 | c41eea6e | Iustin Pop | @rtype: boolean
|
1792 | c41eea6e | Iustin Pop | @return: True if the removal was successful
|
1793 | 6f695a2e | Manuel Franceschini |
|
1794 | 6f695a2e | Manuel Franceschini | """
|
1795 | 6f695a2e | Manuel Franceschini | try:
|
1796 | 6f695a2e | Manuel Franceschini | os.remove(self.dev_path)
|
1797 | 6f695a2e | Manuel Franceschini | except OSError, err: |
1798 | 0c6c04ec | Iustin Pop | if err.errno != errno.ENOENT:
|
1799 | 0c6c04ec | Iustin Pop | _ThrowError("Can't remove file '%s': %s", self.dev_path, err) |
1800 | 6f695a2e | Manuel Franceschini | |
1801 | 6f695a2e | Manuel Franceschini | def Attach(self): |
1802 | 6f695a2e | Manuel Franceschini | """Attach to an existing file.
|
1803 | 6f695a2e | Manuel Franceschini |
|
1804 | 6f695a2e | Manuel Franceschini | Check if this file already exists.
|
1805 | 6f695a2e | Manuel Franceschini |
|
1806 | c41eea6e | Iustin Pop | @rtype: boolean
|
1807 | c41eea6e | Iustin Pop | @return: True if file exists
|
1808 | 6f695a2e | Manuel Franceschini |
|
1809 | 6f695a2e | Manuel Franceschini | """
|
1810 | ecb091e3 | Iustin Pop | self.attached = os.path.exists(self.dev_path) |
1811 | ecb091e3 | Iustin Pop | return self.attached |
1812 | 6f695a2e | Manuel Franceschini | |
1813 | fcff3897 | Iustin Pop | def GetActualSize(self): |
1814 | fcff3897 | Iustin Pop | """Return the actual disk size.
|
1815 | fcff3897 | Iustin Pop |
|
1816 | fcff3897 | Iustin Pop | @note: the device needs to be active when this is called
|
1817 | fcff3897 | Iustin Pop |
|
1818 | fcff3897 | Iustin Pop | """
|
1819 | fcff3897 | Iustin Pop | assert self.attached, "BlockDevice not attached in GetActualSize()" |
1820 | fcff3897 | Iustin Pop | try:
|
1821 | fcff3897 | Iustin Pop | st = os.stat(self.dev_path)
|
1822 | fcff3897 | Iustin Pop | return st.st_size
|
1823 | fcff3897 | Iustin Pop | except OSError, err: |
1824 | fcff3897 | Iustin Pop | _ThrowError("Can't stat %s: %s", self.dev_path, err) |
1825 | fcff3897 | Iustin Pop | |
1826 | 6f695a2e | Manuel Franceschini | @classmethod
|
1827 | 6f695a2e | Manuel Franceschini | def Create(cls, unique_id, children, size): |
1828 | 6f695a2e | Manuel Franceschini | """Create a new file.
|
1829 | 6f695a2e | Manuel Franceschini |
|
1830 | c41eea6e | Iustin Pop | @param size: the size of file in MiB
|
1831 | 6f695a2e | Manuel Franceschini |
|
1832 | c41eea6e | Iustin Pop | @rtype: L{bdev.FileStorage}
|
1833 | c41eea6e | Iustin Pop | @return: an instance of FileStorage
|
1834 | 6f695a2e | Manuel Franceschini |
|
1835 | 6f695a2e | Manuel Franceschini | """
|
1836 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1837 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1838 | 6f695a2e | Manuel Franceschini | dev_path = unique_id[1]
|
1839 | aed77cea | Guido Trotter | if os.path.exists(dev_path):
|
1840 | aed77cea | Guido Trotter | _ThrowError("File already existing: %s", dev_path)
|
1841 | 6f695a2e | Manuel Franceschini | try:
|
1842 | 6f695a2e | Manuel Franceschini | f = open(dev_path, 'w') |
1843 | 6f695a2e | Manuel Franceschini | f.truncate(size * 1024 * 1024) |
1844 | 6f695a2e | Manuel Franceschini | f.close() |
1845 | 6c626518 | Iustin Pop | except IOError, err: |
1846 | 82463074 | Iustin Pop | _ThrowError("Error in file creation: %", str(err)) |
1847 | 6f695a2e | Manuel Franceschini | |
1848 | 464f8daf | Iustin Pop | return FileStorage(unique_id, children, size)
|
1849 | 6f695a2e | Manuel Franceschini | |
1850 | 6f695a2e | Manuel Franceschini | |
1851 | a8083063 | Iustin Pop | DEV_MAP = { |
1852 | fe96220b | Iustin Pop | constants.LD_LV: LogicalVolume, |
1853 | a1f445d3 | Iustin Pop | constants.LD_DRBD8: DRBD8, |
1854 | 6f695a2e | Manuel Franceschini | constants.LD_FILE: FileStorage, |
1855 | a8083063 | Iustin Pop | } |
1856 | a8083063 | Iustin Pop | |
1857 | a8083063 | Iustin Pop | |
1858 | 464f8daf | Iustin Pop | def FindDevice(dev_type, unique_id, children, size): |
1859 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
1860 | a8083063 | Iustin Pop |
|
1861 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
1862 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
1863 | a8083063 | Iustin Pop |
|
1864 | a8083063 | Iustin Pop | """
|
1865 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1866 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1867 | 464f8daf | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children, size) |
1868 | cb999543 | Iustin Pop | if not device.attached: |
1869 | a8083063 | Iustin Pop | return None |
1870 | ecb091e3 | Iustin Pop | return device
|
1871 | a8083063 | Iustin Pop | |
1872 | a8083063 | Iustin Pop | |
1873 | 464f8daf | Iustin Pop | def Assemble(dev_type, unique_id, children, size): |
1874 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
1875 | a8083063 | Iustin Pop |
|
1876 | f96e3c4f | Iustin Pop | This will attach to assemble the device, as needed, to bring it
|
1877 | f96e3c4f | Iustin Pop | fully up. It must be safe to run on already-assembled devices.
|
1878 | a8083063 | Iustin Pop |
|
1879 | a8083063 | Iustin Pop | """
|
1880 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1881 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1882 | 464f8daf | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children, size) |
1883 | 1063abd1 | Iustin Pop | device.Assemble() |
1884 | a8083063 | Iustin Pop | return device
|
1885 | a8083063 | Iustin Pop | |
1886 | a8083063 | Iustin Pop | |
1887 | a8083063 | Iustin Pop | def Create(dev_type, unique_id, children, size): |
1888 | a8083063 | Iustin Pop | """Create a device.
|
1889 | a8083063 | Iustin Pop |
|
1890 | a8083063 | Iustin Pop | """
|
1891 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1892 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1893 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type].Create(unique_id, children, size) |
1894 | a8083063 | Iustin Pop | return device |