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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 | a8083063 | Iustin Pop | |
30 | a8083063 | Iustin Pop | from ganeti import utils |
31 | a8083063 | Iustin Pop | from ganeti import logger |
32 | a8083063 | Iustin Pop | from ganeti import errors |
33 | fe96220b | Iustin Pop | from ganeti import constants |
34 | a8083063 | Iustin Pop | |
35 | a8083063 | Iustin Pop | |
36 | a8083063 | Iustin Pop | class BlockDev(object): |
37 | a8083063 | Iustin Pop | """Block device abstract class.
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38 | a8083063 | Iustin Pop |
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39 | a8083063 | Iustin Pop | A block device can be in the following states:
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40 | a8083063 | Iustin Pop | - not existing on the system, and by `Create()` it goes into:
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41 | a8083063 | Iustin Pop | - existing but not setup/not active, and by `Assemble()` goes into:
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42 | a8083063 | Iustin Pop | - active read-write and by `Open()` it goes into
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43 | a8083063 | Iustin Pop | - online (=used, or ready for use)
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44 | a8083063 | Iustin Pop |
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45 | a8083063 | Iustin Pop | A device can also be online but read-only, however we are not using
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46 | abdf0113 | Iustin Pop | the readonly state (LV has it, if needed in the future) and we are
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47 | abdf0113 | Iustin Pop | usually looking at this like at a stack, so it's easier to
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48 | abdf0113 | Iustin Pop | conceptualise the transition from not-existing to online and back
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49 | a8083063 | Iustin Pop | like a linear one.
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50 | a8083063 | Iustin Pop |
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51 | a8083063 | Iustin Pop | The many different states of the device are due to the fact that we
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52 | a8083063 | Iustin Pop | need to cover many device types:
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53 | a8083063 | Iustin Pop | - logical volumes are created, lvchange -a y $lv, and used
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54 | a8083063 | Iustin Pop | - drbd devices are attached to a local disk/remote peer and made primary
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55 | a8083063 | Iustin Pop |
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56 | a8083063 | Iustin Pop | A block device is identified by three items:
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57 | a8083063 | Iustin Pop | - the /dev path of the device (dynamic)
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58 | a8083063 | Iustin Pop | - a unique ID of the device (static)
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59 | a8083063 | Iustin Pop | - it's major/minor pair (dynamic)
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60 | a8083063 | Iustin Pop |
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61 | a8083063 | Iustin Pop | Not all devices implement both the first two as distinct items. LVM
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62 | a8083063 | Iustin Pop | logical volumes have their unique ID (the pair volume group, logical
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63 | abdf0113 | Iustin Pop | volume name) in a 1-to-1 relation to the dev path. For DRBD devices,
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64 | abdf0113 | Iustin Pop | the /dev path is again dynamic and the unique id is the pair (host1,
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65 | abdf0113 | Iustin Pop | dev1), (host2, dev2).
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66 | a8083063 | Iustin Pop |
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67 | a8083063 | Iustin Pop | You can get to a device in two ways:
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68 | a8083063 | Iustin Pop | - creating the (real) device, which returns you
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69 | abdf0113 | Iustin Pop | an attached instance (lvcreate)
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70 | a8083063 | Iustin Pop | - attaching of a python instance to an existing (real) device
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71 | a8083063 | Iustin Pop |
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72 | a8083063 | Iustin Pop | The second point, the attachement to a device, is different
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73 | a8083063 | Iustin Pop | depending on whether the device is assembled or not. At init() time,
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74 | a8083063 | Iustin Pop | we search for a device with the same unique_id as us. If found,
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75 | a8083063 | Iustin Pop | good. It also means that the device is already assembled. If not,
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76 | a8083063 | Iustin Pop | after assembly we'll have our correct major/minor.
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77 | a8083063 | Iustin Pop |
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78 | a8083063 | Iustin Pop | """
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79 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
80 | a8083063 | Iustin Pop | self._children = children
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81 | a8083063 | Iustin Pop | self.dev_path = None |
82 | a8083063 | Iustin Pop | self.unique_id = unique_id
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83 | a8083063 | Iustin Pop | self.major = None |
84 | a8083063 | Iustin Pop | self.minor = None |
85 | a8083063 | Iustin Pop | |
86 | a8083063 | Iustin Pop | def Assemble(self): |
87 | a8083063 | Iustin Pop | """Assemble the device from its components.
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88 | a8083063 | Iustin Pop |
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89 | a8083063 | Iustin Pop | If this is a plain block device (e.g. LVM) than assemble does
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90 | a8083063 | Iustin Pop | nothing, as the LVM has no children and we don't put logical
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91 | a8083063 | Iustin Pop | volumes offline.
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92 | a8083063 | Iustin Pop |
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93 | a8083063 | Iustin Pop | One guarantee is that after the device has been assembled, it
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94 | a8083063 | Iustin Pop | knows its major/minor numbers. This allows other devices (usually
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95 | a8083063 | Iustin Pop | parents) to probe correctly for their children.
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96 | a8083063 | Iustin Pop |
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97 | a8083063 | Iustin Pop | """
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98 | a8083063 | Iustin Pop | status = True
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99 | a8083063 | Iustin Pop | for child in self._children: |
100 | a8083063 | Iustin Pop | if not isinstance(child, BlockDev): |
101 | a8083063 | Iustin Pop | raise TypeError("Invalid child passed of type '%s'" % type(child)) |
102 | a8083063 | Iustin Pop | if not status: |
103 | a8083063 | Iustin Pop | break
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104 | a8083063 | Iustin Pop | status = status and child.Assemble()
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105 | a8083063 | Iustin Pop | if not status: |
106 | a8083063 | Iustin Pop | break
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107 | fdbd668d | Iustin Pop | |
108 | fdbd668d | Iustin Pop | try:
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109 | fdbd668d | Iustin Pop | child.Open() |
110 | fdbd668d | Iustin Pop | except errors.BlockDeviceError:
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111 | fdbd668d | Iustin Pop | for child in self._children: |
112 | fdbd668d | Iustin Pop | child.Shutdown() |
113 | fdbd668d | Iustin Pop | raise
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114 | a8083063 | Iustin Pop | |
115 | a8083063 | Iustin Pop | if not status: |
116 | a8083063 | Iustin Pop | for child in self._children: |
117 | a8083063 | Iustin Pop | child.Shutdown() |
118 | a8083063 | Iustin Pop | return status
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119 | a8083063 | Iustin Pop | |
120 | a8083063 | Iustin Pop | def Attach(self): |
121 | a8083063 | Iustin Pop | """Find a device which matches our config and attach to it.
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122 | a8083063 | Iustin Pop |
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123 | a8083063 | Iustin Pop | """
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124 | a8083063 | Iustin Pop | raise NotImplementedError |
125 | a8083063 | Iustin Pop | |
126 | a8083063 | Iustin Pop | def Close(self): |
127 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
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128 | a8083063 | Iustin Pop |
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129 | a8083063 | Iustin Pop | """
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130 | a8083063 | Iustin Pop | raise NotImplementedError |
131 | a8083063 | Iustin Pop | |
132 | a8083063 | Iustin Pop | @classmethod
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133 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
134 | a8083063 | Iustin Pop | """Create the device.
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135 | a8083063 | Iustin Pop |
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136 | a8083063 | Iustin Pop | If the device cannot be created, it will return None
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137 | a8083063 | Iustin Pop | instead. Error messages go to the logging system.
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138 | a8083063 | Iustin Pop |
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139 | a8083063 | Iustin Pop | Note that for some devices, the unique_id is used, and for other,
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140 | a8083063 | Iustin Pop | the children. The idea is that these two, taken together, are
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141 | a8083063 | Iustin Pop | enough for both creation and assembly (later).
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142 | a8083063 | Iustin Pop |
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143 | a8083063 | Iustin Pop | """
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144 | a8083063 | Iustin Pop | raise NotImplementedError |
145 | a8083063 | Iustin Pop | |
146 | a8083063 | Iustin Pop | def Remove(self): |
147 | a8083063 | Iustin Pop | """Remove this device.
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148 | a8083063 | Iustin Pop |
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149 | abdf0113 | Iustin Pop | This makes sense only for some of the device types: LV and file
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150 | abdf0113 | Iustin Pop | storeage. Also note that if the device can't attach, the removal
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151 | abdf0113 | Iustin Pop | can't be completed.
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152 | a8083063 | Iustin Pop |
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153 | a8083063 | Iustin Pop | """
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154 | a8083063 | Iustin Pop | raise NotImplementedError |
155 | a8083063 | Iustin Pop | |
156 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
157 | f3e513ad | Iustin Pop | """Rename this device.
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158 | f3e513ad | Iustin Pop |
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159 | f3e513ad | Iustin Pop | This may or may not make sense for a given device type.
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160 | f3e513ad | Iustin Pop |
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161 | f3e513ad | Iustin Pop | """
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162 | f3e513ad | Iustin Pop | raise NotImplementedError |
163 | f3e513ad | Iustin Pop | |
164 | a8083063 | Iustin Pop | def Open(self, force=False): |
165 | a8083063 | Iustin Pop | """Make the device ready for use.
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166 | a8083063 | Iustin Pop |
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167 | a8083063 | Iustin Pop | This makes the device ready for I/O. For now, just the DRBD
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168 | a8083063 | Iustin Pop | devices need this.
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169 | a8083063 | Iustin Pop |
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170 | a8083063 | Iustin Pop | The force parameter signifies that if the device has any kind of
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171 | a8083063 | Iustin Pop | --force thing, it should be used, we know what we are doing.
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172 | a8083063 | Iustin Pop |
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173 | a8083063 | Iustin Pop | """
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174 | a8083063 | Iustin Pop | raise NotImplementedError |
175 | a8083063 | Iustin Pop | |
176 | a8083063 | Iustin Pop | def Shutdown(self): |
177 | a8083063 | Iustin Pop | """Shut down the device, freeing its children.
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178 | a8083063 | Iustin Pop |
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179 | a8083063 | Iustin Pop | This undoes the `Assemble()` work, except for the child
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180 | a8083063 | Iustin Pop | assembling; as such, the children on the device are still
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181 | a8083063 | Iustin Pop | assembled after this call.
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182 | a8083063 | Iustin Pop |
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183 | a8083063 | Iustin Pop | """
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184 | a8083063 | Iustin Pop | raise NotImplementedError |
185 | a8083063 | Iustin Pop | |
186 | a8083063 | Iustin Pop | def SetSyncSpeed(self, speed): |
187 | a8083063 | Iustin Pop | """Adjust the sync speed of the mirror.
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188 | a8083063 | Iustin Pop |
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189 | a8083063 | Iustin Pop | In case this is not a mirroring device, this is no-op.
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190 | a8083063 | Iustin Pop |
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191 | a8083063 | Iustin Pop | """
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192 | a8083063 | Iustin Pop | result = True
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193 | a8083063 | Iustin Pop | if self._children: |
194 | a8083063 | Iustin Pop | for child in self._children: |
195 | a8083063 | Iustin Pop | result = result and child.SetSyncSpeed(speed)
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196 | a8083063 | Iustin Pop | return result
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197 | a8083063 | Iustin Pop | |
198 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
199 | a8083063 | Iustin Pop | """Returns the sync status of the device.
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200 | a8083063 | Iustin Pop |
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201 | a8083063 | Iustin Pop | If this device is a mirroring device, this function returns the
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202 | a8083063 | Iustin Pop | status of the mirror.
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203 | a8083063 | Iustin Pop |
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204 | a8083063 | Iustin Pop | Returns:
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205 | 0834c866 | Iustin Pop | (sync_percent, estimated_time, is_degraded, ldisk)
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206 | 0834c866 | Iustin Pop |
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207 | 0834c866 | Iustin Pop | If sync_percent is None, it means the device is not syncing.
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208 | a8083063 | Iustin Pop |
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209 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't estimate
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210 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
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211 | 0834c866 | Iustin Pop |
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212 | a8083063 | Iustin Pop | If is_degraded is True, it means the device is missing
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213 | a8083063 | Iustin Pop | redundancy. This is usually a sign that something went wrong in
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214 | a8083063 | Iustin Pop | the device setup, if sync_percent is None.
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215 | a8083063 | Iustin Pop |
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216 | 0834c866 | Iustin Pop | The ldisk parameter represents the degradation of the local
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217 | 0834c866 | Iustin Pop | data. This is only valid for some devices, the rest will always
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218 | 0834c866 | Iustin Pop | return False (not degraded).
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219 | 0834c866 | Iustin Pop |
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220 | a8083063 | Iustin Pop | """
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221 | 0834c866 | Iustin Pop | return None, None, False, False |
222 | a8083063 | Iustin Pop | |
223 | a8083063 | Iustin Pop | |
224 | a8083063 | Iustin Pop | def CombinedSyncStatus(self): |
225 | a8083063 | Iustin Pop | """Calculate the mirror status recursively for our children.
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226 | a8083063 | Iustin Pop |
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227 | a8083063 | Iustin Pop | The return value is the same as for `GetSyncStatus()` except the
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228 | a8083063 | Iustin Pop | minimum percent and maximum time are calculated across our
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229 | a8083063 | Iustin Pop | children.
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230 | a8083063 | Iustin Pop |
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231 | a8083063 | Iustin Pop | """
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232 | 0834c866 | Iustin Pop | min_percent, max_time, is_degraded, ldisk = self.GetSyncStatus()
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233 | a8083063 | Iustin Pop | if self._children: |
234 | a8083063 | Iustin Pop | for child in self._children: |
235 | 0834c866 | Iustin Pop | c_percent, c_time, c_degraded, c_ldisk = child.GetSyncStatus() |
236 | a8083063 | Iustin Pop | if min_percent is None: |
237 | a8083063 | Iustin Pop | min_percent = c_percent |
238 | a8083063 | Iustin Pop | elif c_percent is not None: |
239 | a8083063 | Iustin Pop | min_percent = min(min_percent, c_percent)
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240 | a8083063 | Iustin Pop | if max_time is None: |
241 | a8083063 | Iustin Pop | max_time = c_time |
242 | a8083063 | Iustin Pop | elif c_time is not None: |
243 | a8083063 | Iustin Pop | max_time = max(max_time, c_time)
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244 | a8083063 | Iustin Pop | is_degraded = is_degraded or c_degraded
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245 | 0834c866 | Iustin Pop | ldisk = ldisk or c_ldisk
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246 | 0834c866 | Iustin Pop | return min_percent, max_time, is_degraded, ldisk
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247 | a8083063 | Iustin Pop | |
248 | a8083063 | Iustin Pop | |
249 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
250 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
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251 | a0c3fea1 | Michael Hanselmann |
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252 | a0c3fea1 | Michael Hanselmann | Only supported for some device types.
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253 | a0c3fea1 | Michael Hanselmann |
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254 | a0c3fea1 | Michael Hanselmann | """
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255 | a0c3fea1 | Michael Hanselmann | for child in self._children: |
256 | a0c3fea1 | Michael Hanselmann | child.SetInfo(text) |
257 | a0c3fea1 | Michael Hanselmann | |
258 | a0c3fea1 | Michael Hanselmann | |
259 | a8083063 | Iustin Pop | def __repr__(self): |
260 | a8083063 | Iustin Pop | return ("<%s: unique_id: %s, children: %s, %s:%s, %s>" % |
261 | a8083063 | Iustin Pop | (self.__class__, self.unique_id, self._children, |
262 | a8083063 | Iustin Pop | self.major, self.minor, self.dev_path)) |
263 | a8083063 | Iustin Pop | |
264 | a8083063 | Iustin Pop | |
265 | a8083063 | Iustin Pop | class LogicalVolume(BlockDev): |
266 | a8083063 | Iustin Pop | """Logical Volume block device.
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267 | a8083063 | Iustin Pop |
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268 | a8083063 | Iustin Pop | """
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269 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
270 | a8083063 | Iustin Pop | """Attaches to a LV device.
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271 | a8083063 | Iustin Pop |
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272 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
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273 | a8083063 | Iustin Pop |
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274 | a8083063 | Iustin Pop | """
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275 | a8083063 | Iustin Pop | super(LogicalVolume, self).__init__(unique_id, children) |
276 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
277 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
278 | a8083063 | Iustin Pop | self._vg_name, self._lv_name = unique_id |
279 | a8083063 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
280 | a8083063 | Iustin Pop | self.Attach()
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281 | a8083063 | Iustin Pop | |
282 | a8083063 | Iustin Pop | @classmethod
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283 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
284 | a8083063 | Iustin Pop | """Create a new logical volume.
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285 | a8083063 | Iustin Pop |
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286 | a8083063 | Iustin Pop | """
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287 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
288 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
289 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
290 | a8083063 | Iustin Pop | pvs_info = cls.GetPVInfo(vg_name) |
291 | a8083063 | Iustin Pop | if not pvs_info: |
292 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't compute PV info for vg %s" % |
293 | 3ecf6786 | Iustin Pop | vg_name) |
294 | a8083063 | Iustin Pop | pvs_info.sort() |
295 | a8083063 | Iustin Pop | pvs_info.reverse() |
296 | 5b7b5d49 | Guido Trotter | |
297 | 5b7b5d49 | Guido Trotter | pvlist = [ pv[1] for pv in pvs_info ] |
298 | 5b7b5d49 | Guido Trotter | free_size = sum([ pv[0] for pv in pvs_info ]) |
299 | 5b7b5d49 | Guido Trotter | |
300 | 5b7b5d49 | Guido Trotter | # The size constraint should have been checked from the master before
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301 | 5b7b5d49 | Guido Trotter | # calling the create function.
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302 | a8083063 | Iustin Pop | if free_size < size:
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303 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Not enough free space: required %s," |
304 | 3ecf6786 | Iustin Pop | " available %s" % (size, free_size))
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305 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-n%s" % lv_name, |
306 | 5b7b5d49 | Guido Trotter | vg_name] + pvlist) |
307 | a8083063 | Iustin Pop | if result.failed:
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308 | 6c896e2f | Iustin Pop | raise errors.BlockDeviceError("%s - %s" % (result.fail_reason, |
309 | 6c896e2f | Iustin Pop | result.output)) |
310 | a8083063 | Iustin Pop | return LogicalVolume(unique_id, children)
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311 | a8083063 | Iustin Pop | |
312 | a8083063 | Iustin Pop | @staticmethod
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313 | a8083063 | Iustin Pop | def GetPVInfo(vg_name): |
314 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
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315 | a8083063 | Iustin Pop |
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316 | a8083063 | Iustin Pop | Args:
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317 | a8083063 | Iustin Pop | vg_name: the volume group name
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318 | a8083063 | Iustin Pop |
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319 | a8083063 | Iustin Pop | Returns:
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320 | a8083063 | Iustin Pop | list of (free_space, name) with free_space in mebibytes
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321 | 098c0958 | Michael Hanselmann |
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322 | a8083063 | Iustin Pop | """
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323 | a8083063 | Iustin Pop | command = ["pvs", "--noheadings", "--nosuffix", "--units=m", |
324 | a8083063 | Iustin Pop | "-opv_name,vg_name,pv_free,pv_attr", "--unbuffered", |
325 | a8083063 | Iustin Pop | "--separator=:"]
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326 | a8083063 | Iustin Pop | result = utils.RunCmd(command) |
327 | a8083063 | Iustin Pop | if result.failed:
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328 | 6c896e2f | Iustin Pop | logger.Error("Can't get the PV information: %s - %s" %
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329 | 6c896e2f | Iustin Pop | (result.fail_reason, result.output)) |
330 | a8083063 | Iustin Pop | return None |
331 | a8083063 | Iustin Pop | data = [] |
332 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
333 | a8083063 | Iustin Pop | fields = line.strip().split(':')
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334 | a8083063 | Iustin Pop | if len(fields) != 4: |
335 | a8083063 | Iustin Pop | logger.Error("Can't parse pvs output: line '%s'" % line)
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336 | a8083063 | Iustin Pop | return None |
337 | a8083063 | Iustin Pop | # skip over pvs from another vg or ones which are not allocatable
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338 | a8083063 | Iustin Pop | if fields[1] != vg_name or fields[3][0] != 'a': |
339 | a8083063 | Iustin Pop | continue
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340 | a8083063 | Iustin Pop | data.append((float(fields[2]), fields[0])) |
341 | a8083063 | Iustin Pop | |
342 | a8083063 | Iustin Pop | return data
|
343 | a8083063 | Iustin Pop | |
344 | a8083063 | Iustin Pop | def Remove(self): |
345 | a8083063 | Iustin Pop | """Remove this logical volume.
|
346 | a8083063 | Iustin Pop |
|
347 | a8083063 | Iustin Pop | """
|
348 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
349 | a8083063 | Iustin Pop | # the LV does not exist
|
350 | a8083063 | Iustin Pop | return True |
351 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
352 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
353 | a8083063 | Iustin Pop | if result.failed:
|
354 | 6c896e2f | Iustin Pop | logger.Error("Can't lvremove: %s - %s" %
|
355 | 6c896e2f | Iustin Pop | (result.fail_reason, result.output)) |
356 | a8083063 | Iustin Pop | |
357 | a8083063 | Iustin Pop | return not result.failed |
358 | a8083063 | Iustin Pop | |
359 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
360 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
361 | f3e513ad | Iustin Pop |
|
362 | f3e513ad | Iustin Pop | """
|
363 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
364 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
365 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
366 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
367 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
368 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
369 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
370 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
371 | f3e513ad | Iustin Pop | if result.failed:
|
372 | f3e513ad | Iustin Pop | raise errors.BlockDeviceError("Failed to rename the logical volume: %s" % |
373 | f3e513ad | Iustin Pop | result.output) |
374 | be345db0 | Iustin Pop | self._lv_name = new_name
|
375 | be345db0 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
376 | be345db0 | Iustin Pop | |
377 | a8083063 | Iustin Pop | def Attach(self): |
378 | a8083063 | Iustin Pop | """Attach to an existing LV.
|
379 | a8083063 | Iustin Pop |
|
380 | a8083063 | Iustin Pop | This method will try to see if an existing and active LV exists
|
381 | c99a3cc0 | Manuel Franceschini | which matches our name. If so, its major/minor will be
|
382 | a8083063 | Iustin Pop | recorded.
|
383 | a8083063 | Iustin Pop |
|
384 | a8083063 | Iustin Pop | """
|
385 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvdisplay", self.dev_path]) |
386 | a8083063 | Iustin Pop | if result.failed:
|
387 | fcb1f331 | Michael Hanselmann | logger.Error("Can't find LV %s: %s, %s" %
|
388 | fcb1f331 | Michael Hanselmann | (self.dev_path, result.fail_reason, result.output))
|
389 | a8083063 | Iustin Pop | return False |
390 | a8083063 | Iustin Pop | match = re.compile("^ *Block device *([0-9]+):([0-9]+).*$")
|
391 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
392 | a8083063 | Iustin Pop | match_result = match.match(line) |
393 | a8083063 | Iustin Pop | if match_result:
|
394 | a8083063 | Iustin Pop | self.major = int(match_result.group(1)) |
395 | a8083063 | Iustin Pop | self.minor = int(match_result.group(2)) |
396 | a8083063 | Iustin Pop | return True |
397 | a8083063 | Iustin Pop | return False |
398 | a8083063 | Iustin Pop | |
399 | a8083063 | Iustin Pop | def Assemble(self): |
400 | a8083063 | Iustin Pop | """Assemble the device.
|
401 | a8083063 | Iustin Pop |
|
402 | 5574047a | Iustin Pop | We alway run `lvchange -ay` on the LV to ensure it's active before
|
403 | 5574047a | Iustin Pop | use, as there were cases when xenvg was not active after boot
|
404 | 5574047a | Iustin Pop | (also possibly after disk issues).
|
405 | a8083063 | Iustin Pop |
|
406 | a8083063 | Iustin Pop | """
|
407 | 5574047a | Iustin Pop | result = utils.RunCmd(["lvchange", "-ay", self.dev_path]) |
408 | 5574047a | Iustin Pop | if result.failed:
|
409 | 5574047a | Iustin Pop | logger.Error("Can't activate lv %s: %s" % (self.dev_path, result.output)) |
410 | 5574047a | Iustin Pop | return not result.failed |
411 | a8083063 | Iustin Pop | |
412 | a8083063 | Iustin Pop | def Shutdown(self): |
413 | a8083063 | Iustin Pop | """Shutdown the device.
|
414 | a8083063 | Iustin Pop |
|
415 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
416 | a8083063 | Iustin Pop | volumes on shutdown.
|
417 | a8083063 | Iustin Pop |
|
418 | a8083063 | Iustin Pop | """
|
419 | a8083063 | Iustin Pop | return True |
420 | a8083063 | Iustin Pop | |
421 | 9db6dbce | Iustin Pop | def GetSyncStatus(self): |
422 | 9db6dbce | Iustin Pop | """Returns the sync status of the device.
|
423 | 9db6dbce | Iustin Pop |
|
424 | 9db6dbce | Iustin Pop | If this device is a mirroring device, this function returns the
|
425 | 9db6dbce | Iustin Pop | status of the mirror.
|
426 | 9db6dbce | Iustin Pop |
|
427 | 9db6dbce | Iustin Pop | Returns:
|
428 | 0834c866 | Iustin Pop | (sync_percent, estimated_time, is_degraded, ldisk)
|
429 | 9db6dbce | Iustin Pop |
|
430 | 9db6dbce | Iustin Pop | For logical volumes, sync_percent and estimated_time are always
|
431 | 9db6dbce | Iustin Pop | None (no recovery in progress, as we don't handle the mirrored LV
|
432 | 0834c866 | Iustin Pop | case). The is_degraded parameter is the inverse of the ldisk
|
433 | 0834c866 | Iustin Pop | parameter.
|
434 | 9db6dbce | Iustin Pop |
|
435 | 0834c866 | Iustin Pop | For the ldisk parameter, we check if the logical volume has the
|
436 | 0834c866 | Iustin Pop | 'virtual' type, which means it's not backed by existing storage
|
437 | 0834c866 | Iustin Pop | anymore (read from it return I/O error). This happens after a
|
438 | 0834c866 | Iustin Pop | physical disk failure and subsequent 'vgreduce --removemissing' on
|
439 | 0834c866 | Iustin Pop | the volume group.
|
440 | 9db6dbce | Iustin Pop |
|
441 | 9db6dbce | Iustin Pop | """
|
442 | 9db6dbce | Iustin Pop | result = utils.RunCmd(["lvs", "--noheadings", "-olv_attr", self.dev_path]) |
443 | 9db6dbce | Iustin Pop | if result.failed:
|
444 | 6c896e2f | Iustin Pop | logger.Error("Can't display lv: %s - %s" %
|
445 | 6c896e2f | Iustin Pop | (result.fail_reason, result.output)) |
446 | 0834c866 | Iustin Pop | return None, None, True, True |
447 | 9db6dbce | Iustin Pop | out = result.stdout.strip() |
448 | 9db6dbce | Iustin Pop | # format: type/permissions/alloc/fixed_minor/state/open
|
449 | 9db6dbce | Iustin Pop | if len(out) != 6: |
450 | 0834c866 | Iustin Pop | logger.Debug("Error in lvs output: attrs=%s, len != 6" % out)
|
451 | 0834c866 | Iustin Pop | return None, None, True, True |
452 | 0834c866 | Iustin Pop | ldisk = out[0] == 'v' # virtual volume, i.e. doesn't have |
453 | 0834c866 | Iustin Pop | # backing storage
|
454 | 0834c866 | Iustin Pop | return None, None, ldisk, ldisk |
455 | 9db6dbce | Iustin Pop | |
456 | a8083063 | Iustin Pop | def Open(self, force=False): |
457 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
458 | a8083063 | Iustin Pop |
|
459 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
460 | a8083063 | Iustin Pop |
|
461 | a8083063 | Iustin Pop | """
|
462 | fdbd668d | Iustin Pop | pass
|
463 | a8083063 | Iustin Pop | |
464 | a8083063 | Iustin Pop | def Close(self): |
465 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
466 | a8083063 | Iustin Pop |
|
467 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
468 | a8083063 | Iustin Pop |
|
469 | a8083063 | Iustin Pop | """
|
470 | fdbd668d | Iustin Pop | pass
|
471 | a8083063 | Iustin Pop | |
472 | a8083063 | Iustin Pop | def Snapshot(self, size): |
473 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
474 | a8083063 | Iustin Pop |
|
475 | a8083063 | Iustin Pop | """
|
476 | a8083063 | Iustin Pop | snap_name = self._lv_name + ".snap" |
477 | a8083063 | Iustin Pop | |
478 | a8083063 | Iustin Pop | # remove existing snapshot if found
|
479 | a8083063 | Iustin Pop | snap = LogicalVolume((self._vg_name, snap_name), None) |
480 | a8083063 | Iustin Pop | snap.Remove() |
481 | a8083063 | Iustin Pop | |
482 | a8083063 | Iustin Pop | pvs_info = self.GetPVInfo(self._vg_name) |
483 | a8083063 | Iustin Pop | if not pvs_info: |
484 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't compute PV info for vg %s" % |
485 | 3ecf6786 | Iustin Pop | self._vg_name)
|
486 | a8083063 | Iustin Pop | pvs_info.sort() |
487 | a8083063 | Iustin Pop | pvs_info.reverse() |
488 | a8083063 | Iustin Pop | free_size, pv_name = pvs_info[0]
|
489 | a8083063 | Iustin Pop | if free_size < size:
|
490 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Not enough free space: required %s," |
491 | 3ecf6786 | Iustin Pop | " available %s" % (size, free_size))
|
492 | a8083063 | Iustin Pop | |
493 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
494 | a8083063 | Iustin Pop | "-n%s" % snap_name, self.dev_path]) |
495 | a8083063 | Iustin Pop | if result.failed:
|
496 | 6c896e2f | Iustin Pop | raise errors.BlockDeviceError("command: %s error: %s - %s" % |
497 | 6c896e2f | Iustin Pop | (result.cmd, result.fail_reason, |
498 | 6c896e2f | Iustin Pop | result.output)) |
499 | a8083063 | Iustin Pop | |
500 | a8083063 | Iustin Pop | return snap_name
|
501 | a8083063 | Iustin Pop | |
502 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
503 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
504 | a0c3fea1 | Michael Hanselmann |
|
505 | a0c3fea1 | Michael Hanselmann | """
|
506 | a0c3fea1 | Michael Hanselmann | BlockDev.SetInfo(self, text)
|
507 | a0c3fea1 | Michael Hanselmann | |
508 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
509 | a0c3fea1 | Michael Hanselmann | text = re.sub('^[^A-Za-z0-9_+.]', '_', text) |
510 | a0c3fea1 | Michael Hanselmann | text = re.sub('[^-A-Za-z0-9_+.]', '_', text) |
511 | a0c3fea1 | Michael Hanselmann | |
512 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
513 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
514 | a0c3fea1 | Michael Hanselmann | |
515 | a0c3fea1 | Michael Hanselmann | result = utils.RunCmd(["lvchange", "--addtag", text, |
516 | a0c3fea1 | Michael Hanselmann | self.dev_path])
|
517 | a0c3fea1 | Michael Hanselmann | if result.failed:
|
518 | 6c896e2f | Iustin Pop | raise errors.BlockDeviceError("Command: %s error: %s - %s" % |
519 | 6c896e2f | Iustin Pop | (result.cmd, result.fail_reason, |
520 | 6c896e2f | Iustin Pop | result.output)) |
521 | a0c3fea1 | Michael Hanselmann | |
522 | a0c3fea1 | Michael Hanselmann | |
523 | 0f7f32d9 | Iustin Pop | class BaseDRBD(BlockDev): |
524 | 0f7f32d9 | Iustin Pop | """Base DRBD class.
|
525 | a8083063 | Iustin Pop |
|
526 | 0f7f32d9 | Iustin Pop | This class contains a few bits of common functionality between the
|
527 | 0f7f32d9 | Iustin Pop | 0.7 and 8.x versions of DRBD.
|
528 | 0f7f32d9 | Iustin Pop |
|
529 | abdf0113 | Iustin Pop | """
|
530 | abdf0113 | Iustin Pop | _VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)"
|
531 | abdf0113 | Iustin Pop | r" \(api:(\d+)/proto:(\d+)(?:-(\d+))?\)")
|
532 | a8083063 | Iustin Pop | |
533 | abdf0113 | Iustin Pop | _DRBD_MAJOR = 147
|
534 | abdf0113 | Iustin Pop | _ST_UNCONFIGURED = "Unconfigured"
|
535 | abdf0113 | Iustin Pop | _ST_WFCONNECTION = "WFConnection"
|
536 | abdf0113 | Iustin Pop | _ST_CONNECTED = "Connected"
|
537 | a8083063 | Iustin Pop | |
538 | abdf0113 | Iustin Pop | @staticmethod
|
539 | abdf0113 | Iustin Pop | def _GetProcData(): |
540 | abdf0113 | Iustin Pop | """Return data from /proc/drbd.
|
541 | a8083063 | Iustin Pop |
|
542 | a8083063 | Iustin Pop | """
|
543 | abdf0113 | Iustin Pop | stat = open("/proc/drbd", "r") |
544 | abdf0113 | Iustin Pop | try:
|
545 | abdf0113 | Iustin Pop | data = stat.read().splitlines() |
546 | abdf0113 | Iustin Pop | finally:
|
547 | abdf0113 | Iustin Pop | stat.close() |
548 | abdf0113 | Iustin Pop | if not data: |
549 | abdf0113 | Iustin Pop | raise errors.BlockDeviceError("Can't read any data from /proc/drbd") |
550 | abdf0113 | Iustin Pop | return data
|
551 | a8083063 | Iustin Pop | |
552 | abdf0113 | Iustin Pop | @staticmethod
|
553 | abdf0113 | Iustin Pop | def _MassageProcData(data): |
554 | abdf0113 | Iustin Pop | """Transform the output of _GetProdData into a nicer form.
|
555 | a8083063 | Iustin Pop |
|
556 | abdf0113 | Iustin Pop | Returns:
|
557 | abdf0113 | Iustin Pop | a dictionary of minor: joined lines from /proc/drbd for that minor
|
558 | a8083063 | Iustin Pop |
|
559 | a8083063 | Iustin Pop | """
|
560 | abdf0113 | Iustin Pop | lmatch = re.compile("^ *([0-9]+):.*$")
|
561 | abdf0113 | Iustin Pop | results = {} |
562 | abdf0113 | Iustin Pop | old_minor = old_line = None
|
563 | abdf0113 | Iustin Pop | for line in data: |
564 | abdf0113 | Iustin Pop | lresult = lmatch.match(line) |
565 | abdf0113 | Iustin Pop | if lresult is not None: |
566 | abdf0113 | Iustin Pop | if old_minor is not None: |
567 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
568 | abdf0113 | Iustin Pop | old_minor = int(lresult.group(1)) |
569 | abdf0113 | Iustin Pop | old_line = line |
570 | abdf0113 | Iustin Pop | else:
|
571 | abdf0113 | Iustin Pop | if old_minor is not None: |
572 | abdf0113 | Iustin Pop | old_line += " " + line.strip()
|
573 | abdf0113 | Iustin Pop | # add last line
|
574 | abdf0113 | Iustin Pop | if old_minor is not None: |
575 | abdf0113 | Iustin Pop | results[old_minor] = old_line |
576 | abdf0113 | Iustin Pop | return results
|
577 | a8083063 | Iustin Pop | |
578 | abdf0113 | Iustin Pop | @classmethod
|
579 | abdf0113 | Iustin Pop | def _GetVersion(cls): |
580 | abdf0113 | Iustin Pop | """Return the DRBD version.
|
581 | a8083063 | Iustin Pop |
|
582 | abdf0113 | Iustin Pop | This will return a dict with keys:
|
583 | abdf0113 | Iustin Pop | k_major,
|
584 | abdf0113 | Iustin Pop | k_minor,
|
585 | abdf0113 | Iustin Pop | k_point,
|
586 | abdf0113 | Iustin Pop | api,
|
587 | abdf0113 | Iustin Pop | proto,
|
588 | abdf0113 | Iustin Pop | proto2 (only on drbd > 8.2.X)
|
589 | a8083063 | Iustin Pop |
|
590 | a8083063 | Iustin Pop | """
|
591 | abdf0113 | Iustin Pop | proc_data = cls._GetProcData() |
592 | abdf0113 | Iustin Pop | first_line = proc_data[0].strip()
|
593 | abdf0113 | Iustin Pop | version = cls._VERSION_RE.match(first_line) |
594 | abdf0113 | Iustin Pop | if not version: |
595 | abdf0113 | Iustin Pop | raise errors.BlockDeviceError("Can't parse DRBD version from '%s'" % |
596 | abdf0113 | Iustin Pop | first_line) |
597 | a8083063 | Iustin Pop | |
598 | abdf0113 | Iustin Pop | values = version.groups() |
599 | abdf0113 | Iustin Pop | retval = {'k_major': int(values[0]), |
600 | abdf0113 | Iustin Pop | 'k_minor': int(values[1]), |
601 | abdf0113 | Iustin Pop | 'k_point': int(values[2]), |
602 | abdf0113 | Iustin Pop | 'api': int(values[3]), |
603 | abdf0113 | Iustin Pop | 'proto': int(values[4]), |
604 | abdf0113 | Iustin Pop | } |
605 | abdf0113 | Iustin Pop | if values[5] is not None: |
606 | abdf0113 | Iustin Pop | retval['proto2'] = values[5] |
607 | a8083063 | Iustin Pop | |
608 | abdf0113 | Iustin Pop | return retval
|
609 | abdf0113 | Iustin Pop | |
610 | abdf0113 | Iustin Pop | @staticmethod
|
611 | abdf0113 | Iustin Pop | def _DevPath(minor): |
612 | abdf0113 | Iustin Pop | """Return the path to a drbd device for a given minor.
|
613 | a8083063 | Iustin Pop |
|
614 | a8083063 | Iustin Pop | """
|
615 | abdf0113 | Iustin Pop | return "/dev/drbd%d" % minor |
616 | a8083063 | Iustin Pop | |
617 | abdf0113 | Iustin Pop | @classmethod
|
618 | abdf0113 | Iustin Pop | def _GetUsedDevs(cls): |
619 | abdf0113 | Iustin Pop | """Compute the list of used DRBD devices.
|
620 | a8083063 | Iustin Pop |
|
621 | a8083063 | Iustin Pop | """
|
622 | abdf0113 | Iustin Pop | data = cls._GetProcData() |
623 | a8083063 | Iustin Pop | |
624 | abdf0113 | Iustin Pop | used_devs = {} |
625 | abdf0113 | Iustin Pop | valid_line = re.compile("^ *([0-9]+): cs:([^ ]+).*$")
|
626 | abdf0113 | Iustin Pop | for line in data: |
627 | abdf0113 | Iustin Pop | match = valid_line.match(line) |
628 | abdf0113 | Iustin Pop | if not match: |
629 | abdf0113 | Iustin Pop | continue
|
630 | abdf0113 | Iustin Pop | minor = int(match.group(1)) |
631 | abdf0113 | Iustin Pop | state = match.group(2)
|
632 | abdf0113 | Iustin Pop | if state == cls._ST_UNCONFIGURED:
|
633 | abdf0113 | Iustin Pop | continue
|
634 | abdf0113 | Iustin Pop | used_devs[minor] = state, line |
635 | a8083063 | Iustin Pop | |
636 | abdf0113 | Iustin Pop | return used_devs
|
637 | a8083063 | Iustin Pop | |
638 | abdf0113 | Iustin Pop | def _SetFromMinor(self, minor): |
639 | abdf0113 | Iustin Pop | """Set our parameters based on the given minor.
|
640 | 0834c866 | Iustin Pop |
|
641 | abdf0113 | Iustin Pop | This sets our minor variable and our dev_path.
|
642 | a8083063 | Iustin Pop |
|
643 | a8083063 | Iustin Pop | """
|
644 | abdf0113 | Iustin Pop | if minor is None: |
645 | abdf0113 | Iustin Pop | self.minor = self.dev_path = None |
646 | a8083063 | Iustin Pop | else:
|
647 | abdf0113 | Iustin Pop | self.minor = minor
|
648 | abdf0113 | Iustin Pop | self.dev_path = self._DevPath(minor) |
649 | a8083063 | Iustin Pop | |
650 | a8083063 | Iustin Pop | @staticmethod
|
651 | abdf0113 | Iustin Pop | def _CheckMetaSize(meta_device): |
652 | abdf0113 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
653 | a8083063 | Iustin Pop |
|
654 | abdf0113 | Iustin Pop | This currently only check the size, which must be around
|
655 | abdf0113 | Iustin Pop | 128MiB.
|
656 | a8083063 | Iustin Pop |
|
657 | a8083063 | Iustin Pop | """
|
658 | abdf0113 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize", meta_device]) |
659 | abdf0113 | Iustin Pop | if result.failed:
|
660 | abdf0113 | Iustin Pop | logger.Error("Failed to get device size: %s - %s" %
|
661 | abdf0113 | Iustin Pop | (result.fail_reason, result.output)) |
662 | abdf0113 | Iustin Pop | return False |
663 | a8083063 | Iustin Pop | try:
|
664 | abdf0113 | Iustin Pop | sectors = int(result.stdout)
|
665 | abdf0113 | Iustin Pop | except ValueError: |
666 | abdf0113 | Iustin Pop | logger.Error("Invalid output from blockdev: '%s'" % result.stdout)
|
667 | abdf0113 | Iustin Pop | return False |
668 | abdf0113 | Iustin Pop | bytes = sectors * 512
|
669 | abdf0113 | Iustin Pop | if bytes < 128 * 1024 * 1024: # less than 128MiB |
670 | abdf0113 | Iustin Pop | logger.Error("Meta device too small (%.2fMib)" % (bytes / 1024 / 1024)) |
671 | abdf0113 | Iustin Pop | return False |
672 | abdf0113 | Iustin Pop | if bytes > (128 + 32) * 1024 * 1024: # account for an extra (big) PE on LVM |
673 | abdf0113 | Iustin Pop | logger.Error("Meta device too big (%.2fMiB)" % (bytes / 1024 / 1024)) |
674 | abdf0113 | Iustin Pop | return False |
675 | abdf0113 | Iustin Pop | return True |
676 | a8083063 | Iustin Pop | |
677 | abdf0113 | Iustin Pop | def Rename(self, new_id): |
678 | abdf0113 | Iustin Pop | """Rename a device.
|
679 | a8083063 | Iustin Pop |
|
680 | abdf0113 | Iustin Pop | This is not supported for drbd devices.
|
681 | a8083063 | Iustin Pop |
|
682 | a8083063 | Iustin Pop | """
|
683 | abdf0113 | Iustin Pop | raise errors.ProgrammerError("Can't rename a drbd device") |
684 | a8083063 | Iustin Pop | |
685 | f3e513ad | Iustin Pop | |
686 | a2cfdea2 | Iustin Pop | class DRBD8(BaseDRBD): |
687 | a2cfdea2 | Iustin Pop | """DRBD v8.x block device.
|
688 | a2cfdea2 | Iustin Pop |
|
689 | a2cfdea2 | Iustin Pop | This implements the local host part of the DRBD device, i.e. it
|
690 | a2cfdea2 | Iustin Pop | doesn't do anything to the supposed peer. If you need a fully
|
691 | a2cfdea2 | Iustin Pop | connected DRBD pair, you need to use this class on both hosts.
|
692 | a2cfdea2 | Iustin Pop |
|
693 | a2cfdea2 | Iustin Pop | The unique_id for the drbd device is the (local_ip, local_port,
|
694 | a2cfdea2 | Iustin Pop | remote_ip, remote_port) tuple, and it must have two children: the
|
695 | a2cfdea2 | Iustin Pop | data device and the meta_device. The meta device is checked for
|
696 | a2cfdea2 | Iustin Pop | valid size and is zeroed on create.
|
697 | a2cfdea2 | Iustin Pop |
|
698 | a2cfdea2 | Iustin Pop | """
|
699 | a2cfdea2 | Iustin Pop | _MAX_MINORS = 255
|
700 | a2cfdea2 | Iustin Pop | _PARSE_SHOW = None
|
701 | a2cfdea2 | Iustin Pop | |
702 | a2cfdea2 | Iustin Pop | def __init__(self, unique_id, children): |
703 | fc1dc9d7 | Iustin Pop | if children and children.count(None) > 0: |
704 | fc1dc9d7 | Iustin Pop | children = [] |
705 | a2cfdea2 | Iustin Pop | super(DRBD8, self).__init__(unique_id, children) |
706 | a2cfdea2 | Iustin Pop | self.major = self._DRBD_MAJOR |
707 | c3f9340c | Guido Trotter | version = self._GetVersion()
|
708 | c3f9340c | Guido Trotter | if version['k_major'] != 8 : |
709 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Mismatch in DRBD kernel version and" |
710 | a2cfdea2 | Iustin Pop | " requested ganeti usage: kernel is"
|
711 | c3f9340c | Guido Trotter | " %s.%s, ganeti wants 8.x" %
|
712 | c3f9340c | Guido Trotter | (version['k_major'], version['k_minor'])) |
713 | a2cfdea2 | Iustin Pop | |
714 | b00b95dd | Iustin Pop | if len(children) not in (0, 2): |
715 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(children)) |
716 | a2cfdea2 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 4: |
717 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
718 | a2cfdea2 | Iustin Pop | self._lhost, self._lport, self._rhost, self._rport = unique_id |
719 | a2cfdea2 | Iustin Pop | self.Attach()
|
720 | a2cfdea2 | Iustin Pop | |
721 | a2cfdea2 | Iustin Pop | @classmethod
|
722 | a2cfdea2 | Iustin Pop | def _InitMeta(cls, minor, dev_path): |
723 | a2cfdea2 | Iustin Pop | """Initialize a meta device.
|
724 | a2cfdea2 | Iustin Pop |
|
725 | a2cfdea2 | Iustin Pop | This will not work if the given minor is in use.
|
726 | a2cfdea2 | Iustin Pop |
|
727 | a2cfdea2 | Iustin Pop | """
|
728 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", "--force", cls._DevPath(minor), |
729 | a2cfdea2 | Iustin Pop | "v08", dev_path, "0", "create-md"]) |
730 | a2cfdea2 | Iustin Pop | if result.failed:
|
731 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't initialize meta device: %s" % |
732 | a2cfdea2 | Iustin Pop | result.output) |
733 | a2cfdea2 | Iustin Pop | |
734 | a2cfdea2 | Iustin Pop | @classmethod
|
735 | a2cfdea2 | Iustin Pop | def _FindUnusedMinor(cls): |
736 | a2cfdea2 | Iustin Pop | """Find an unused DRBD device.
|
737 | a2cfdea2 | Iustin Pop |
|
738 | a2cfdea2 | Iustin Pop | This is specific to 8.x as the minors are allocated dynamically,
|
739 | a2cfdea2 | Iustin Pop | so non-existing numbers up to a max minor count are actually free.
|
740 | a2cfdea2 | Iustin Pop |
|
741 | a2cfdea2 | Iustin Pop | """
|
742 | a2cfdea2 | Iustin Pop | data = cls._GetProcData() |
743 | a2cfdea2 | Iustin Pop | |
744 | a2cfdea2 | Iustin Pop | unused_line = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
745 | a2cfdea2 | Iustin Pop | used_line = re.compile("^ *([0-9]+): cs:")
|
746 | a2cfdea2 | Iustin Pop | highest = None
|
747 | a2cfdea2 | Iustin Pop | for line in data: |
748 | a2cfdea2 | Iustin Pop | match = unused_line.match(line) |
749 | a2cfdea2 | Iustin Pop | if match:
|
750 | a2cfdea2 | Iustin Pop | return int(match.group(1)) |
751 | a2cfdea2 | Iustin Pop | match = used_line.match(line) |
752 | a2cfdea2 | Iustin Pop | if match:
|
753 | a2cfdea2 | Iustin Pop | minor = int(match.group(1)) |
754 | a2cfdea2 | Iustin Pop | highest = max(highest, minor)
|
755 | a2cfdea2 | Iustin Pop | if highest is None: # there are no minors in use at all |
756 | a2cfdea2 | Iustin Pop | return 0 |
757 | a2cfdea2 | Iustin Pop | if highest >= cls._MAX_MINORS:
|
758 | a2cfdea2 | Iustin Pop | logger.Error("Error: no free drbd minors!")
|
759 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
760 | a2cfdea2 | Iustin Pop | return highest + 1 |
761 | a2cfdea2 | Iustin Pop | |
762 | a2cfdea2 | Iustin Pop | @classmethod
|
763 | a2cfdea2 | Iustin Pop | def _IsValidMeta(cls, meta_device): |
764 | a2cfdea2 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
765 | a2cfdea2 | Iustin Pop |
|
766 | a2cfdea2 | Iustin Pop | """
|
767 | a2cfdea2 | Iustin Pop | minor = cls._FindUnusedMinor() |
768 | a2cfdea2 | Iustin Pop | minor_path = cls._DevPath(minor) |
769 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", minor_path,
|
770 | a2cfdea2 | Iustin Pop | "v08", meta_device, "0", |
771 | a2cfdea2 | Iustin Pop | "dstate"])
|
772 | a2cfdea2 | Iustin Pop | if result.failed:
|
773 | a2cfdea2 | Iustin Pop | logger.Error("Invalid meta device %s: %s" % (meta_device, result.output))
|
774 | a2cfdea2 | Iustin Pop | return False |
775 | a2cfdea2 | Iustin Pop | return True |
776 | a2cfdea2 | Iustin Pop | |
777 | a2cfdea2 | Iustin Pop | @classmethod
|
778 | a2cfdea2 | Iustin Pop | def _GetShowParser(cls): |
779 | a2cfdea2 | Iustin Pop | """Return a parser for `drbd show` output.
|
780 | a2cfdea2 | Iustin Pop |
|
781 | a2cfdea2 | Iustin Pop | This will either create or return an already-create parser for the
|
782 | a2cfdea2 | Iustin Pop | output of the command `drbd show`.
|
783 | a2cfdea2 | Iustin Pop |
|
784 | a2cfdea2 | Iustin Pop | """
|
785 | a2cfdea2 | Iustin Pop | if cls._PARSE_SHOW is not None: |
786 | a2cfdea2 | Iustin Pop | return cls._PARSE_SHOW
|
787 | a2cfdea2 | Iustin Pop | |
788 | a2cfdea2 | Iustin Pop | # pyparsing setup
|
789 | a2cfdea2 | Iustin Pop | lbrace = pyp.Literal("{").suppress()
|
790 | a2cfdea2 | Iustin Pop | rbrace = pyp.Literal("}").suppress()
|
791 | a2cfdea2 | Iustin Pop | semi = pyp.Literal(";").suppress()
|
792 | a2cfdea2 | Iustin Pop | # this also converts the value to an int
|
793 | c522ea02 | Iustin Pop | number = pyp.Word(pyp.nums).setParseAction(lambda s, l, t: int(t[0])) |
794 | a2cfdea2 | Iustin Pop | |
795 | a2cfdea2 | Iustin Pop | comment = pyp.Literal ("#") + pyp.Optional(pyp.restOfLine)
|
796 | a2cfdea2 | Iustin Pop | defa = pyp.Literal("_is_default").suppress()
|
797 | a2cfdea2 | Iustin Pop | dbl_quote = pyp.Literal('"').suppress()
|
798 | a2cfdea2 | Iustin Pop | |
799 | a2cfdea2 | Iustin Pop | keyword = pyp.Word(pyp.alphanums + '-')
|
800 | a2cfdea2 | Iustin Pop | |
801 | a2cfdea2 | Iustin Pop | # value types
|
802 | a2cfdea2 | Iustin Pop | value = pyp.Word(pyp.alphanums + '_-/.:')
|
803 | a2cfdea2 | Iustin Pop | quoted = dbl_quote + pyp.CharsNotIn('"') + dbl_quote
|
804 | a2cfdea2 | Iustin Pop | addr_port = (pyp.Word(pyp.nums + '.') + pyp.Literal(':').suppress() + |
805 | a2cfdea2 | Iustin Pop | number) |
806 | a2cfdea2 | Iustin Pop | # meta device, extended syntax
|
807 | a2cfdea2 | Iustin Pop | meta_value = ((value ^ quoted) + pyp.Literal('[').suppress() +
|
808 | a2cfdea2 | Iustin Pop | number + pyp.Word(']').suppress())
|
809 | a2cfdea2 | Iustin Pop | |
810 | a2cfdea2 | Iustin Pop | # a statement
|
811 | a2cfdea2 | Iustin Pop | stmt = (~rbrace + keyword + ~lbrace + |
812 | 63012024 | Guido Trotter | pyp.Optional(addr_port ^ value ^ quoted ^ meta_value) + |
813 | a2cfdea2 | Iustin Pop | pyp.Optional(defa) + semi + |
814 | a2cfdea2 | Iustin Pop | pyp.Optional(pyp.restOfLine).suppress()) |
815 | a2cfdea2 | Iustin Pop | |
816 | a2cfdea2 | Iustin Pop | # an entire section
|
817 | a2cfdea2 | Iustin Pop | section_name = pyp.Word(pyp.alphas + '_')
|
818 | a2cfdea2 | Iustin Pop | section = section_name + lbrace + pyp.ZeroOrMore(pyp.Group(stmt)) + rbrace |
819 | a2cfdea2 | Iustin Pop | |
820 | a2cfdea2 | Iustin Pop | bnf = pyp.ZeroOrMore(pyp.Group(section ^ stmt)) |
821 | a2cfdea2 | Iustin Pop | bnf.ignore(comment) |
822 | a2cfdea2 | Iustin Pop | |
823 | a2cfdea2 | Iustin Pop | cls._PARSE_SHOW = bnf |
824 | a2cfdea2 | Iustin Pop | |
825 | a2cfdea2 | Iustin Pop | return bnf
|
826 | a2cfdea2 | Iustin Pop | |
827 | a2cfdea2 | Iustin Pop | @classmethod
|
828 | 3840729d | Iustin Pop | def _GetShowData(cls, minor): |
829 | 3840729d | Iustin Pop | """Return the `drbdsetup show` data for a minor.
|
830 | a2cfdea2 | Iustin Pop |
|
831 | a2cfdea2 | Iustin Pop | """
|
832 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
833 | a2cfdea2 | Iustin Pop | if result.failed:
|
834 | 6c896e2f | Iustin Pop | logger.Error("Can't display the drbd config: %s - %s" %
|
835 | 6c896e2f | Iustin Pop | (result.fail_reason, result.output)) |
836 | 3840729d | Iustin Pop | return None |
837 | 3840729d | Iustin Pop | return result.stdout
|
838 | 3840729d | Iustin Pop | |
839 | 3840729d | Iustin Pop | @classmethod
|
840 | 3840729d | Iustin Pop | def _GetDevInfo(cls, out): |
841 | 3840729d | Iustin Pop | """Parse details about a given DRBD minor.
|
842 | 3840729d | Iustin Pop |
|
843 | 3840729d | Iustin Pop | This return, if available, the local backing device (as a path)
|
844 | 3840729d | Iustin Pop | and the local and remote (ip, port) information from a string
|
845 | 3840729d | Iustin Pop | containing the output of the `drbdsetup show` command as returned
|
846 | 3840729d | Iustin Pop | by _GetShowData.
|
847 | 3840729d | Iustin Pop |
|
848 | 3840729d | Iustin Pop | """
|
849 | 3840729d | Iustin Pop | data = {} |
850 | a2cfdea2 | Iustin Pop | if not out: |
851 | a2cfdea2 | Iustin Pop | return data
|
852 | a2cfdea2 | Iustin Pop | |
853 | a2cfdea2 | Iustin Pop | bnf = cls._GetShowParser() |
854 | a2cfdea2 | Iustin Pop | # run pyparse
|
855 | a2cfdea2 | Iustin Pop | |
856 | a2cfdea2 | Iustin Pop | try:
|
857 | a2cfdea2 | Iustin Pop | results = bnf.parseString(out) |
858 | a2cfdea2 | Iustin Pop | except pyp.ParseException, err:
|
859 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't parse drbdsetup show output: %s" % |
860 | a2cfdea2 | Iustin Pop | str(err))
|
861 | a2cfdea2 | Iustin Pop | |
862 | a2cfdea2 | Iustin Pop | # and massage the results into our desired format
|
863 | a2cfdea2 | Iustin Pop | for section in results: |
864 | a2cfdea2 | Iustin Pop | sname = section[0]
|
865 | a2cfdea2 | Iustin Pop | if sname == "_this_host": |
866 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
867 | a2cfdea2 | Iustin Pop | if lst[0] == "disk": |
868 | a2cfdea2 | Iustin Pop | data["local_dev"] = lst[1] |
869 | a2cfdea2 | Iustin Pop | elif lst[0] == "meta-disk": |
870 | a2cfdea2 | Iustin Pop | data["meta_dev"] = lst[1] |
871 | a2cfdea2 | Iustin Pop | data["meta_index"] = lst[2] |
872 | a2cfdea2 | Iustin Pop | elif lst[0] == "address": |
873 | a2cfdea2 | Iustin Pop | data["local_addr"] = tuple(lst[1:]) |
874 | a2cfdea2 | Iustin Pop | elif sname == "_remote_host": |
875 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
876 | a2cfdea2 | Iustin Pop | if lst[0] == "address": |
877 | a2cfdea2 | Iustin Pop | data["remote_addr"] = tuple(lst[1:]) |
878 | a2cfdea2 | Iustin Pop | return data
|
879 | a2cfdea2 | Iustin Pop | |
880 | a2cfdea2 | Iustin Pop | def _MatchesLocal(self, info): |
881 | a2cfdea2 | Iustin Pop | """Test if our local config matches with an existing device.
|
882 | a2cfdea2 | Iustin Pop |
|
883 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
884 | a2cfdea2 | Iustin Pop | method tests if our local backing device is the same as the one in
|
885 | a2cfdea2 | Iustin Pop | the info parameter, in effect testing if we look like the given
|
886 | a2cfdea2 | Iustin Pop | device.
|
887 | a2cfdea2 | Iustin Pop |
|
888 | a2cfdea2 | Iustin Pop | """
|
889 | b00b95dd | Iustin Pop | if self._children: |
890 | b00b95dd | Iustin Pop | backend, meta = self._children
|
891 | b00b95dd | Iustin Pop | else:
|
892 | b00b95dd | Iustin Pop | backend = meta = None
|
893 | b00b95dd | Iustin Pop | |
894 | a2cfdea2 | Iustin Pop | if backend is not None: |
895 | b00b95dd | Iustin Pop | retval = ("local_dev" in info and info["local_dev"] == backend.dev_path) |
896 | a2cfdea2 | Iustin Pop | else:
|
897 | a2cfdea2 | Iustin Pop | retval = ("local_dev" not in info) |
898 | b00b95dd | Iustin Pop | |
899 | a2cfdea2 | Iustin Pop | if meta is not None: |
900 | b00b95dd | Iustin Pop | retval = retval and ("meta_dev" in info and |
901 | b00b95dd | Iustin Pop | info["meta_dev"] == meta.dev_path)
|
902 | b00b95dd | Iustin Pop | retval = retval and ("meta_index" in info and |
903 | b00b95dd | Iustin Pop | info["meta_index"] == 0) |
904 | a2cfdea2 | Iustin Pop | else:
|
905 | a2cfdea2 | Iustin Pop | retval = retval and ("meta_dev" not in info and |
906 | a2cfdea2 | Iustin Pop | "meta_index" not in info) |
907 | a2cfdea2 | Iustin Pop | return retval
|
908 | a2cfdea2 | Iustin Pop | |
909 | a2cfdea2 | Iustin Pop | def _MatchesNet(self, info): |
910 | a2cfdea2 | Iustin Pop | """Test if our network config matches with an existing device.
|
911 | a2cfdea2 | Iustin Pop |
|
912 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
913 | a2cfdea2 | Iustin Pop | method tests if our network configuration is the same as the one
|
914 | a2cfdea2 | Iustin Pop | in the info parameter, in effect testing if we look like the given
|
915 | a2cfdea2 | Iustin Pop | device.
|
916 | a2cfdea2 | Iustin Pop |
|
917 | a2cfdea2 | Iustin Pop | """
|
918 | a2cfdea2 | Iustin Pop | if (((self._lhost is None and not ("local_addr" in info)) and |
919 | a2cfdea2 | Iustin Pop | (self._rhost is None and not ("remote_addr" in info)))): |
920 | a2cfdea2 | Iustin Pop | return True |
921 | a2cfdea2 | Iustin Pop | |
922 | a2cfdea2 | Iustin Pop | if self._lhost is None: |
923 | a2cfdea2 | Iustin Pop | return False |
924 | a2cfdea2 | Iustin Pop | |
925 | a2cfdea2 | Iustin Pop | if not ("local_addr" in info and |
926 | a2cfdea2 | Iustin Pop | "remote_addr" in info): |
927 | a2cfdea2 | Iustin Pop | return False |
928 | a2cfdea2 | Iustin Pop | |
929 | a2cfdea2 | Iustin Pop | retval = (info["local_addr"] == (self._lhost, self._lport)) |
930 | a2cfdea2 | Iustin Pop | retval = (retval and
|
931 | a2cfdea2 | Iustin Pop | info["remote_addr"] == (self._rhost, self._rport)) |
932 | a2cfdea2 | Iustin Pop | return retval
|
933 | a2cfdea2 | Iustin Pop | |
934 | a2cfdea2 | Iustin Pop | @classmethod
|
935 | a2cfdea2 | Iustin Pop | def _AssembleLocal(cls, minor, backend, meta): |
936 | a2cfdea2 | Iustin Pop | """Configure the local part of a DRBD device.
|
937 | a2cfdea2 | Iustin Pop |
|
938 | a2cfdea2 | Iustin Pop | This is the first thing that must be done on an unconfigured DRBD
|
939 | a2cfdea2 | Iustin Pop | device. And it must be done only once.
|
940 | a2cfdea2 | Iustin Pop |
|
941 | a2cfdea2 | Iustin Pop | """
|
942 | a2cfdea2 | Iustin Pop | if not cls._IsValidMeta(meta): |
943 | a2cfdea2 | Iustin Pop | return False |
944 | 333411a7 | Guido Trotter | args = ["drbdsetup", cls._DevPath(minor), "disk", |
945 | 333411a7 | Guido Trotter | backend, meta, "0", "-e", "detach", "--create-device"] |
946 | 333411a7 | Guido Trotter | result = utils.RunCmd(args) |
947 | a2cfdea2 | Iustin Pop | if result.failed:
|
948 | a2cfdea2 | Iustin Pop | logger.Error("Can't attach local disk: %s" % result.output)
|
949 | a2cfdea2 | Iustin Pop | return not result.failed |
950 | a2cfdea2 | Iustin Pop | |
951 | a2cfdea2 | Iustin Pop | @classmethod
|
952 | a2cfdea2 | Iustin Pop | def _AssembleNet(cls, minor, net_info, protocol, |
953 | a2cfdea2 | Iustin Pop | dual_pri=False, hmac=None, secret=None): |
954 | a2cfdea2 | Iustin Pop | """Configure the network part of the device.
|
955 | a2cfdea2 | Iustin Pop |
|
956 | a2cfdea2 | Iustin Pop | """
|
957 | a2cfdea2 | Iustin Pop | lhost, lport, rhost, rport = net_info |
958 | 52857176 | Iustin Pop | if None in net_info: |
959 | 52857176 | Iustin Pop | # we don't want network connection and actually want to make
|
960 | 52857176 | Iustin Pop | # sure its shutdown
|
961 | 52857176 | Iustin Pop | return cls._ShutdownNet(minor)
|
962 | 52857176 | Iustin Pop | |
963 | a2cfdea2 | Iustin Pop | args = ["drbdsetup", cls._DevPath(minor), "net", |
964 | f38478b2 | Iustin Pop | "%s:%s" % (lhost, lport), "%s:%s" % (rhost, rport), protocol, |
965 | f38478b2 | Iustin Pop | "-A", "discard-zero-changes", |
966 | f38478b2 | Iustin Pop | "-B", "consensus", |
967 | ab6cc81c | Iustin Pop | "--create-device",
|
968 | f38478b2 | Iustin Pop | ] |
969 | a2cfdea2 | Iustin Pop | if dual_pri:
|
970 | a2cfdea2 | Iustin Pop | args.append("-m")
|
971 | a2cfdea2 | Iustin Pop | if hmac and secret: |
972 | a2cfdea2 | Iustin Pop | args.extend(["-a", hmac, "-x", secret]) |
973 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(args) |
974 | a2cfdea2 | Iustin Pop | if result.failed:
|
975 | 6c896e2f | Iustin Pop | logger.Error("Can't setup network for dbrd device: %s - %s" %
|
976 | 6c896e2f | Iustin Pop | (result.fail_reason, result.output)) |
977 | a2cfdea2 | Iustin Pop | return False |
978 | a2cfdea2 | Iustin Pop | |
979 | a2cfdea2 | Iustin Pop | timeout = time.time() + 10
|
980 | a2cfdea2 | Iustin Pop | ok = False
|
981 | a2cfdea2 | Iustin Pop | while time.time() < timeout:
|
982 | 3840729d | Iustin Pop | info = cls._GetDevInfo(cls._GetShowData(minor)) |
983 | a2cfdea2 | Iustin Pop | if not "local_addr" in info or not "remote_addr" in info: |
984 | a2cfdea2 | Iustin Pop | time.sleep(1)
|
985 | a2cfdea2 | Iustin Pop | continue
|
986 | a2cfdea2 | Iustin Pop | if (info["local_addr"] != (lhost, lport) or |
987 | a2cfdea2 | Iustin Pop | info["remote_addr"] != (rhost, rport)):
|
988 | a2cfdea2 | Iustin Pop | time.sleep(1)
|
989 | a2cfdea2 | Iustin Pop | continue
|
990 | a2cfdea2 | Iustin Pop | ok = True
|
991 | a2cfdea2 | Iustin Pop | break
|
992 | a2cfdea2 | Iustin Pop | if not ok: |
993 | a2cfdea2 | Iustin Pop | logger.Error("Timeout while configuring network")
|
994 | a2cfdea2 | Iustin Pop | return False |
995 | a2cfdea2 | Iustin Pop | return True |
996 | a2cfdea2 | Iustin Pop | |
997 | b00b95dd | Iustin Pop | def AddChildren(self, devices): |
998 | b00b95dd | Iustin Pop | """Add a disk to the DRBD device.
|
999 | b00b95dd | Iustin Pop |
|
1000 | b00b95dd | Iustin Pop | """
|
1001 | b00b95dd | Iustin Pop | if self.minor is None: |
1002 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to dbrd8 during AddChildren") |
1003 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1004 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Need two devices for AddChildren") |
1005 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1006 | 03ece5f3 | Iustin Pop | if "local_dev" in info: |
1007 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("DRBD8 already attached to a local disk") |
1008 | b00b95dd | Iustin Pop | backend, meta = devices |
1009 | b00b95dd | Iustin Pop | if backend.dev_path is None or meta.dev_path is None: |
1010 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Children not ready during AddChildren") |
1011 | b00b95dd | Iustin Pop | backend.Open() |
1012 | b00b95dd | Iustin Pop | meta.Open() |
1013 | b00b95dd | Iustin Pop | if not self._CheckMetaSize(meta.dev_path): |
1014 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device size") |
1015 | b00b95dd | Iustin Pop | self._InitMeta(self._FindUnusedMinor(), meta.dev_path) |
1016 | b00b95dd | Iustin Pop | if not self._IsValidMeta(meta.dev_path): |
1017 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Cannot initalize meta device") |
1018 | b00b95dd | Iustin Pop | |
1019 | b00b95dd | Iustin Pop | if not self._AssembleLocal(self.minor, backend.dev_path, meta.dev_path): |
1020 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to local storage") |
1021 | b00b95dd | Iustin Pop | self._children = devices
|
1022 | b00b95dd | Iustin Pop | |
1023 | b00b95dd | Iustin Pop | def RemoveChildren(self, devices): |
1024 | b00b95dd | Iustin Pop | """Detach the drbd device from local storage.
|
1025 | b00b95dd | Iustin Pop |
|
1026 | b00b95dd | Iustin Pop | """
|
1027 | b00b95dd | Iustin Pop | if self.minor is None: |
1028 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to drbd8 during" |
1029 | b00b95dd | Iustin Pop | " RemoveChildren")
|
1030 | 03ece5f3 | Iustin Pop | # early return if we don't actually have backing storage
|
1031 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(self.minor)) |
1032 | 03ece5f3 | Iustin Pop | if "local_dev" not in info: |
1033 | 03ece5f3 | Iustin Pop | return
|
1034 | b00b95dd | Iustin Pop | if len(self._children) != 2: |
1035 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("We don't have two children: %s" % |
1036 | b00b95dd | Iustin Pop | self._children)
|
1037 | e739bd57 | Iustin Pop | if self._children.count(None) == 2: # we don't actually have children :) |
1038 | e739bd57 | Iustin Pop | logger.Error("Requested detach while detached")
|
1039 | e739bd57 | Iustin Pop | return
|
1040 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1041 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("We need two children in RemoveChildren") |
1042 | e739bd57 | Iustin Pop | for child, dev in zip(self._children, devices): |
1043 | e739bd57 | Iustin Pop | if dev != child.dev_path:
|
1044 | e739bd57 | Iustin Pop | raise errors.BlockDeviceError("Mismatch in local storage" |
1045 | e739bd57 | Iustin Pop | " (%s != %s) in RemoveChildren" %
|
1046 | e739bd57 | Iustin Pop | (dev, child.dev_path)) |
1047 | b00b95dd | Iustin Pop | |
1048 | b00b95dd | Iustin Pop | if not self._ShutdownLocal(self.minor): |
1049 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't detach from local storage") |
1050 | b00b95dd | Iustin Pop | self._children = []
|
1051 | b00b95dd | Iustin Pop | |
1052 | a2cfdea2 | Iustin Pop | def SetSyncSpeed(self, kbytes): |
1053 | a2cfdea2 | Iustin Pop | """Set the speed of the DRBD syncer.
|
1054 | a2cfdea2 | Iustin Pop |
|
1055 | a2cfdea2 | Iustin Pop | """
|
1056 | a2cfdea2 | Iustin Pop | children_result = super(DRBD8, self).SetSyncSpeed(kbytes) |
1057 | a2cfdea2 | Iustin Pop | if self.minor is None: |
1058 | a2cfdea2 | Iustin Pop | logger.Info("Instance not attached to a device")
|
1059 | a2cfdea2 | Iustin Pop | return False |
1060 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "syncer", "-r", "%d" % |
1061 | a2cfdea2 | Iustin Pop | kbytes]) |
1062 | a2cfdea2 | Iustin Pop | if result.failed:
|
1063 | 6c896e2f | Iustin Pop | logger.Error("Can't change syncer rate: %s - %s" %
|
1064 | 6c896e2f | Iustin Pop | (result.fail_reason, result.output)) |
1065 | a2cfdea2 | Iustin Pop | return not result.failed and children_result |
1066 | a2cfdea2 | Iustin Pop | |
1067 | a2cfdea2 | Iustin Pop | def GetSyncStatus(self): |
1068 | a2cfdea2 | Iustin Pop | """Returns the sync status of the device.
|
1069 | a2cfdea2 | Iustin Pop |
|
1070 | a2cfdea2 | Iustin Pop | Returns:
|
1071 | 583e3f6f | Iustin Pop | (sync_percent, estimated_time, is_degraded)
|
1072 | a2cfdea2 | Iustin Pop |
|
1073 | a2cfdea2 | Iustin Pop | If sync_percent is None, it means all is ok
|
1074 | a2cfdea2 | Iustin Pop | If estimated_time is None, it means we can't esimate
|
1075 | 0834c866 | Iustin Pop | the time needed, otherwise it's the time left in seconds.
|
1076 | 0834c866 | Iustin Pop |
|
1077 | 0834c866 | Iustin Pop |
|
1078 | 0834c866 | Iustin Pop | We set the is_degraded parameter to True on two conditions:
|
1079 | 0834c866 | Iustin Pop | network not connected or local disk missing.
|
1080 | 0834c866 | Iustin Pop |
|
1081 | 0834c866 | Iustin Pop | We compute the ldisk parameter based on wheter we have a local
|
1082 | 0834c866 | Iustin Pop | disk or not.
|
1083 | a2cfdea2 | Iustin Pop |
|
1084 | a2cfdea2 | Iustin Pop | """
|
1085 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1086 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device in GetSyncStatus") |
1087 | a2cfdea2 | Iustin Pop | proc_info = self._MassageProcData(self._GetProcData()) |
1088 | a2cfdea2 | Iustin Pop | if self.minor not in proc_info: |
1089 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find myself in /proc (minor %d)" % |
1090 | a2cfdea2 | Iustin Pop | self.minor)
|
1091 | a2cfdea2 | Iustin Pop | line = proc_info[self.minor]
|
1092 | a2cfdea2 | Iustin Pop | match = re.match("^.*sync'ed: *([0-9.]+)%.*"
|
1093 | a2cfdea2 | Iustin Pop | " finish: ([0-9]+):([0-9]+):([0-9]+) .*$", line)
|
1094 | a2cfdea2 | Iustin Pop | if match:
|
1095 | a2cfdea2 | Iustin Pop | sync_percent = float(match.group(1)) |
1096 | a2cfdea2 | Iustin Pop | hours = int(match.group(2)) |
1097 | a2cfdea2 | Iustin Pop | minutes = int(match.group(3)) |
1098 | a2cfdea2 | Iustin Pop | seconds = int(match.group(4)) |
1099 | a2cfdea2 | Iustin Pop | est_time = hours * 3600 + minutes * 60 + seconds |
1100 | a2cfdea2 | Iustin Pop | else:
|
1101 | a2cfdea2 | Iustin Pop | sync_percent = None
|
1102 | a2cfdea2 | Iustin Pop | est_time = None
|
1103 | 583e3f6f | Iustin Pop | match = re.match("^ *\d+: cs:(\w+).*ds:(\w+)/(\w+).*$", line)
|
1104 | a2cfdea2 | Iustin Pop | if not match: |
1105 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find my data in /proc (minor %d)" % |
1106 | a2cfdea2 | Iustin Pop | self.minor)
|
1107 | a2cfdea2 | Iustin Pop | client_state = match.group(1)
|
1108 | 583e3f6f | Iustin Pop | local_disk_state = match.group(2)
|
1109 | 0834c866 | Iustin Pop | ldisk = local_disk_state != "UpToDate"
|
1110 | 0834c866 | Iustin Pop | is_degraded = client_state != "Connected"
|
1111 | 0834c866 | Iustin Pop | return sync_percent, est_time, is_degraded or ldisk, ldisk |
1112 | a2cfdea2 | Iustin Pop | |
1113 | a2cfdea2 | Iustin Pop | def Open(self, force=False): |
1114 | a2cfdea2 | Iustin Pop | """Make the local state primary.
|
1115 | a2cfdea2 | Iustin Pop |
|
1116 | f860ff4e | Guido Trotter | If the 'force' parameter is given, the '-o' option is passed to
|
1117 | f860ff4e | Guido Trotter | drbdsetup. Since this is a potentially dangerous operation, the
|
1118 | a2cfdea2 | Iustin Pop | force flag should be only given after creation, when it actually
|
1119 | f860ff4e | Guido Trotter | is mandatory.
|
1120 | a2cfdea2 | Iustin Pop |
|
1121 | a2cfdea2 | Iustin Pop | """
|
1122 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1123 | a2cfdea2 | Iustin Pop | logger.Error("DRBD cannot attach to a device during open")
|
1124 | a2cfdea2 | Iustin Pop | return False |
1125 | a2cfdea2 | Iustin Pop | cmd = ["drbdsetup", self.dev_path, "primary"] |
1126 | a2cfdea2 | Iustin Pop | if force:
|
1127 | a2cfdea2 | Iustin Pop | cmd.append("-o")
|
1128 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(cmd) |
1129 | a2cfdea2 | Iustin Pop | if result.failed:
|
1130 | fdbd668d | Iustin Pop | msg = ("Can't make drbd device primary: %s" % result.output)
|
1131 | fdbd668d | Iustin Pop | logger.Error(msg) |
1132 | fdbd668d | Iustin Pop | raise errors.BlockDeviceError(msg)
|
1133 | a2cfdea2 | Iustin Pop | |
1134 | a2cfdea2 | Iustin Pop | def Close(self): |
1135 | a2cfdea2 | Iustin Pop | """Make the local state secondary.
|
1136 | a2cfdea2 | Iustin Pop |
|
1137 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1138 | a2cfdea2 | Iustin Pop |
|
1139 | a2cfdea2 | Iustin Pop | """
|
1140 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1141 | a2cfdea2 | Iustin Pop | logger.Info("Instance not attached to a device")
|
1142 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find device") |
1143 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
1144 | a2cfdea2 | Iustin Pop | if result.failed:
|
1145 | fdbd668d | Iustin Pop | msg = ("Can't switch drbd device to"
|
1146 | fdbd668d | Iustin Pop | " secondary: %s" % result.output)
|
1147 | fdbd668d | Iustin Pop | logger.Error(msg) |
1148 | fdbd668d | Iustin Pop | raise errors.BlockDeviceError(msg)
|
1149 | a2cfdea2 | Iustin Pop | |
1150 | a2cfdea2 | Iustin Pop | def Attach(self): |
1151 | a2cfdea2 | Iustin Pop | """Find a DRBD device which matches our config and attach to it.
|
1152 | a2cfdea2 | Iustin Pop |
|
1153 | a2cfdea2 | Iustin Pop | In case of partially attached (local device matches but no network
|
1154 | a2cfdea2 | Iustin Pop | setup), we perform the network attach. If successful, we re-test
|
1155 | a2cfdea2 | Iustin Pop | the attach if can return success.
|
1156 | a2cfdea2 | Iustin Pop |
|
1157 | a2cfdea2 | Iustin Pop | """
|
1158 | a2cfdea2 | Iustin Pop | for minor in self._GetUsedDevs(): |
1159 | 3840729d | Iustin Pop | info = self._GetDevInfo(self._GetShowData(minor)) |
1160 | a2cfdea2 | Iustin Pop | match_l = self._MatchesLocal(info)
|
1161 | a2cfdea2 | Iustin Pop | match_r = self._MatchesNet(info)
|
1162 | a2cfdea2 | Iustin Pop | if match_l and match_r: |
1163 | a2cfdea2 | Iustin Pop | break
|
1164 | a2cfdea2 | Iustin Pop | if match_l and not match_r and "local_addr" not in info: |
1165 | a2cfdea2 | Iustin Pop | res_r = self._AssembleNet(minor,
|
1166 | a2cfdea2 | Iustin Pop | (self._lhost, self._lport, |
1167 | a2cfdea2 | Iustin Pop | self._rhost, self._rport), |
1168 | a2cfdea2 | Iustin Pop | "C")
|
1169 | 3840729d | Iustin Pop | if res_r:
|
1170 | 3840729d | Iustin Pop | if self._MatchesNet(self._GetDevInfo(self._GetShowData(minor))): |
1171 | 3840729d | Iustin Pop | break
|
1172 | fc1dc9d7 | Iustin Pop | # the weakest case: we find something that is only net attached
|
1173 | fc1dc9d7 | Iustin Pop | # even though we were passed some children at init time
|
1174 | fc1dc9d7 | Iustin Pop | if match_r and "local_dev" not in info: |
1175 | fc1dc9d7 | Iustin Pop | break
|
1176 | bf25af3b | Iustin Pop | |
1177 | bf25af3b | Iustin Pop | # this case must be considered only if we actually have local
|
1178 | bf25af3b | Iustin Pop | # storage, i.e. not in diskless mode, because all diskless
|
1179 | bf25af3b | Iustin Pop | # devices are equal from the point of view of local
|
1180 | bf25af3b | Iustin Pop | # configuration
|
1181 | bf25af3b | Iustin Pop | if (match_l and "local_dev" in info and |
1182 | bf25af3b | Iustin Pop | not match_r and "local_addr" in info): |
1183 | 9cdbe77f | Iustin Pop | # strange case - the device network part points to somewhere
|
1184 | 9cdbe77f | Iustin Pop | # else, even though its local storage is ours; as we own the
|
1185 | 9cdbe77f | Iustin Pop | # drbd space, we try to disconnect from the remote peer and
|
1186 | 9cdbe77f | Iustin Pop | # reconnect to our correct one
|
1187 | 9cdbe77f | Iustin Pop | if not self._ShutdownNet(minor): |
1188 | 9cdbe77f | Iustin Pop | raise errors.BlockDeviceError("Device has correct local storage," |
1189 | 9cdbe77f | Iustin Pop | " wrong remote peer and is unable to"
|
1190 | 9cdbe77f | Iustin Pop | " disconnect in order to attach to"
|
1191 | 9cdbe77f | Iustin Pop | " the correct peer")
|
1192 | 9cdbe77f | Iustin Pop | # note: _AssembleNet also handles the case when we don't want
|
1193 | 9cdbe77f | Iustin Pop | # local storage (i.e. one or more of the _[lr](host|port) is
|
1194 | 9cdbe77f | Iustin Pop | # None)
|
1195 | 9cdbe77f | Iustin Pop | if (self._AssembleNet(minor, (self._lhost, self._lport, |
1196 | 9cdbe77f | Iustin Pop | self._rhost, self._rport), "C") and |
1197 | 3840729d | Iustin Pop | self._MatchesNet(self._GetDevInfo(self._GetShowData(minor)))): |
1198 | 9cdbe77f | Iustin Pop | break
|
1199 | 9cdbe77f | Iustin Pop | |
1200 | a2cfdea2 | Iustin Pop | else:
|
1201 | a2cfdea2 | Iustin Pop | minor = None
|
1202 | a2cfdea2 | Iustin Pop | |
1203 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1204 | a2cfdea2 | Iustin Pop | return minor is not None |
1205 | a2cfdea2 | Iustin Pop | |
1206 | a2cfdea2 | Iustin Pop | def Assemble(self): |
1207 | a2cfdea2 | Iustin Pop | """Assemble the drbd.
|
1208 | a2cfdea2 | Iustin Pop |
|
1209 | a2cfdea2 | Iustin Pop | Method:
|
1210 | a2cfdea2 | Iustin Pop | - if we have a local backing device, we bind to it by:
|
1211 | a2cfdea2 | Iustin Pop | - checking the list of used drbd devices
|
1212 | a2cfdea2 | Iustin Pop | - check if the local minor use of any of them is our own device
|
1213 | a2cfdea2 | Iustin Pop | - if yes, abort?
|
1214 | a2cfdea2 | Iustin Pop | - if not, bind
|
1215 | a2cfdea2 | Iustin Pop | - if we have a local/remote net info:
|
1216 | a2cfdea2 | Iustin Pop | - redo the local backing device step for the remote device
|
1217 | a2cfdea2 | Iustin Pop | - check if any drbd device is using the local port,
|
1218 | a2cfdea2 | Iustin Pop | if yes abort
|
1219 | a2cfdea2 | Iustin Pop | - check if any remote drbd device is using the remote
|
1220 | a2cfdea2 | Iustin Pop | port, if yes abort (for now)
|
1221 | a2cfdea2 | Iustin Pop | - bind our net port
|
1222 | a2cfdea2 | Iustin Pop | - bind the remote net port
|
1223 | a2cfdea2 | Iustin Pop |
|
1224 | a2cfdea2 | Iustin Pop | """
|
1225 | a2cfdea2 | Iustin Pop | self.Attach()
|
1226 | a2cfdea2 | Iustin Pop | if self.minor is not None: |
1227 | a2cfdea2 | Iustin Pop | logger.Info("Already assembled")
|
1228 | a2cfdea2 | Iustin Pop | return True |
1229 | a2cfdea2 | Iustin Pop | |
1230 | a2cfdea2 | Iustin Pop | result = super(DRBD8, self).Assemble() |
1231 | a2cfdea2 | Iustin Pop | if not result: |
1232 | a2cfdea2 | Iustin Pop | return result
|
1233 | a2cfdea2 | Iustin Pop | |
1234 | a2cfdea2 | Iustin Pop | minor = self._FindUnusedMinor()
|
1235 | a2cfdea2 | Iustin Pop | need_localdev_teardown = False
|
1236 | fc1dc9d7 | Iustin Pop | if self._children and self._children[0] and self._children[1]: |
1237 | a2cfdea2 | Iustin Pop | result = self._AssembleLocal(minor, self._children[0].dev_path, |
1238 | a2cfdea2 | Iustin Pop | self._children[1].dev_path) |
1239 | a2cfdea2 | Iustin Pop | if not result: |
1240 | a2cfdea2 | Iustin Pop | return False |
1241 | a2cfdea2 | Iustin Pop | need_localdev_teardown = True
|
1242 | a2cfdea2 | Iustin Pop | if self._lhost and self._lport and self._rhost and self._rport: |
1243 | a2cfdea2 | Iustin Pop | result = self._AssembleNet(minor,
|
1244 | a2cfdea2 | Iustin Pop | (self._lhost, self._lport, |
1245 | a2cfdea2 | Iustin Pop | self._rhost, self._rport), |
1246 | a2cfdea2 | Iustin Pop | "C")
|
1247 | a2cfdea2 | Iustin Pop | if not result: |
1248 | a2cfdea2 | Iustin Pop | if need_localdev_teardown:
|
1249 | a2cfdea2 | Iustin Pop | # we will ignore failures from this
|
1250 | a2cfdea2 | Iustin Pop | logger.Error("net setup failed, tearing down local device")
|
1251 | a2cfdea2 | Iustin Pop | self._ShutdownAll(minor)
|
1252 | a2cfdea2 | Iustin Pop | return False |
1253 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
1254 | a2cfdea2 | Iustin Pop | return True |
1255 | a2cfdea2 | Iustin Pop | |
1256 | a2cfdea2 | Iustin Pop | @classmethod
|
1257 | b00b95dd | Iustin Pop | def _ShutdownLocal(cls, minor): |
1258 | b00b95dd | Iustin Pop | """Detach from the local device.
|
1259 | b00b95dd | Iustin Pop |
|
1260 | b00b95dd | Iustin Pop | I/Os will continue to be served from the remote device. If we
|
1261 | b00b95dd | Iustin Pop | don't have a remote device, this operation will fail.
|
1262 | b00b95dd | Iustin Pop |
|
1263 | b00b95dd | Iustin Pop | """
|
1264 | b00b95dd | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
1265 | b00b95dd | Iustin Pop | if result.failed:
|
1266 | b00b95dd | Iustin Pop | logger.Error("Can't detach local device: %s" % result.output)
|
1267 | b00b95dd | Iustin Pop | return not result.failed |
1268 | b00b95dd | Iustin Pop | |
1269 | b00b95dd | Iustin Pop | @classmethod
|
1270 | f3e513ad | Iustin Pop | def _ShutdownNet(cls, minor): |
1271 | f3e513ad | Iustin Pop | """Disconnect from the remote peer.
|
1272 | f3e513ad | Iustin Pop |
|
1273 | f3e513ad | Iustin Pop | This fails if we don't have a local device.
|
1274 | f3e513ad | Iustin Pop |
|
1275 | f3e513ad | Iustin Pop | """
|
1276 | f3e513ad | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
1277 | a8459f1c | Iustin Pop | if result.failed:
|
1278 | a8459f1c | Iustin Pop | logger.Error("Can't shutdown network: %s" % result.output)
|
1279 | f3e513ad | Iustin Pop | return not result.failed |
1280 | f3e513ad | Iustin Pop | |
1281 | f3e513ad | Iustin Pop | @classmethod
|
1282 | a2cfdea2 | Iustin Pop | def _ShutdownAll(cls, minor): |
1283 | a2cfdea2 | Iustin Pop | """Deactivate the device.
|
1284 | a2cfdea2 | Iustin Pop |
|
1285 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1286 | a2cfdea2 | Iustin Pop |
|
1287 | a2cfdea2 | Iustin Pop | """
|
1288 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "down"]) |
1289 | a2cfdea2 | Iustin Pop | if result.failed:
|
1290 | a2cfdea2 | Iustin Pop | logger.Error("Can't shutdown drbd device: %s" % result.output)
|
1291 | a2cfdea2 | Iustin Pop | return not result.failed |
1292 | a2cfdea2 | Iustin Pop | |
1293 | a2cfdea2 | Iustin Pop | def Shutdown(self): |
1294 | a2cfdea2 | Iustin Pop | """Shutdown the DRBD device.
|
1295 | a2cfdea2 | Iustin Pop |
|
1296 | a2cfdea2 | Iustin Pop | """
|
1297 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1298 | a2cfdea2 | Iustin Pop | logger.Info("DRBD device not attached to a device during Shutdown")
|
1299 | a2cfdea2 | Iustin Pop | return True |
1300 | a2cfdea2 | Iustin Pop | if not self._ShutdownAll(self.minor): |
1301 | a2cfdea2 | Iustin Pop | return False |
1302 | a2cfdea2 | Iustin Pop | self.minor = None |
1303 | a2cfdea2 | Iustin Pop | self.dev_path = None |
1304 | a2cfdea2 | Iustin Pop | return True |
1305 | a2cfdea2 | Iustin Pop | |
1306 | a2cfdea2 | Iustin Pop | def Remove(self): |
1307 | a2cfdea2 | Iustin Pop | """Stub remove for DRBD devices.
|
1308 | a2cfdea2 | Iustin Pop |
|
1309 | a2cfdea2 | Iustin Pop | """
|
1310 | a2cfdea2 | Iustin Pop | return self.Shutdown() |
1311 | a2cfdea2 | Iustin Pop | |
1312 | a2cfdea2 | Iustin Pop | @classmethod
|
1313 | a2cfdea2 | Iustin Pop | def Create(cls, unique_id, children, size): |
1314 | a2cfdea2 | Iustin Pop | """Create a new DRBD8 device.
|
1315 | a2cfdea2 | Iustin Pop |
|
1316 | a2cfdea2 | Iustin Pop | Since DRBD devices are not created per se, just assembled, this
|
1317 | a2cfdea2 | Iustin Pop | function only initializes the metadata.
|
1318 | a2cfdea2 | Iustin Pop |
|
1319 | a2cfdea2 | Iustin Pop | """
|
1320 | a2cfdea2 | Iustin Pop | if len(children) != 2: |
1321 | a2cfdea2 | Iustin Pop | raise errors.ProgrammerError("Invalid setup for the drbd device") |
1322 | a2cfdea2 | Iustin Pop | meta = children[1]
|
1323 | a2cfdea2 | Iustin Pop | meta.Assemble() |
1324 | a2cfdea2 | Iustin Pop | if not meta.Attach(): |
1325 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to meta device") |
1326 | a2cfdea2 | Iustin Pop | if not cls._CheckMetaSize(meta.dev_path): |
1327 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device size") |
1328 | a2cfdea2 | Iustin Pop | cls._InitMeta(cls._FindUnusedMinor(), meta.dev_path) |
1329 | a2cfdea2 | Iustin Pop | if not cls._IsValidMeta(meta.dev_path): |
1330 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Cannot initalize meta device") |
1331 | a2cfdea2 | Iustin Pop | return cls(unique_id, children)
|
1332 | a2cfdea2 | Iustin Pop | |
1333 | a8083063 | Iustin Pop | |
1334 | 6f695a2e | Manuel Franceschini | class FileStorage(BlockDev): |
1335 | 6f695a2e | Manuel Franceschini | """File device.
|
1336 | abdf0113 | Iustin Pop |
|
1337 | 6f695a2e | Manuel Franceschini | This class represents the a file storage backend device.
|
1338 | 6f695a2e | Manuel Franceschini |
|
1339 | 6f695a2e | Manuel Franceschini | The unique_id for the file device is a (file_driver, file_path) tuple.
|
1340 | abdf0113 | Iustin Pop |
|
1341 | 6f695a2e | Manuel Franceschini | """
|
1342 | 6f695a2e | Manuel Franceschini | def __init__(self, unique_id, children): |
1343 | 6f695a2e | Manuel Franceschini | """Initalizes a file device backend.
|
1344 | 6f695a2e | Manuel Franceschini |
|
1345 | 6f695a2e | Manuel Franceschini | """
|
1346 | 6f695a2e | Manuel Franceschini | if children:
|
1347 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("Invalid setup for file device") |
1348 | 6f695a2e | Manuel Franceschini | super(FileStorage, self).__init__(unique_id, children) |
1349 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1350 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1351 | 6f695a2e | Manuel Franceschini | self.driver = unique_id[0] |
1352 | 6f695a2e | Manuel Franceschini | self.dev_path = unique_id[1] |
1353 | 6f695a2e | Manuel Franceschini | |
1354 | 6f695a2e | Manuel Franceschini | def Assemble(self): |
1355 | 6f695a2e | Manuel Franceschini | """Assemble the device.
|
1356 | 6f695a2e | Manuel Franceschini |
|
1357 | 6f695a2e | Manuel Franceschini | Checks whether the file device exists, raises BlockDeviceError otherwise.
|
1358 | 6f695a2e | Manuel Franceschini |
|
1359 | 6f695a2e | Manuel Franceschini | """
|
1360 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
1361 | 6f695a2e | Manuel Franceschini | raise errors.BlockDeviceError("File device '%s' does not exist." % |
1362 | 6f695a2e | Manuel Franceschini | self.dev_path)
|
1363 | 6f695a2e | Manuel Franceschini | return True |
1364 | 6f695a2e | Manuel Franceschini | |
1365 | 6f695a2e | Manuel Franceschini | def Shutdown(self): |
1366 | 6f695a2e | Manuel Franceschini | """Shutdown the device.
|
1367 | 6f695a2e | Manuel Franceschini |
|
1368 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type, as we don't deacivate
|
1369 | 6f695a2e | Manuel Franceschini | the file on shutdown.
|
1370 | 6f695a2e | Manuel Franceschini |
|
1371 | 6f695a2e | Manuel Franceschini | """
|
1372 | 6f695a2e | Manuel Franceschini | return True |
1373 | 6f695a2e | Manuel Franceschini | |
1374 | 6f695a2e | Manuel Franceschini | def Open(self, force=False): |
1375 | 6f695a2e | Manuel Franceschini | """Make the device ready for I/O.
|
1376 | 6f695a2e | Manuel Franceschini |
|
1377 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
1378 | 6f695a2e | Manuel Franceschini |
|
1379 | 6f695a2e | Manuel Franceschini | """
|
1380 | 6f695a2e | Manuel Franceschini | pass
|
1381 | 6f695a2e | Manuel Franceschini | |
1382 | 6f695a2e | Manuel Franceschini | def Close(self): |
1383 | 6f695a2e | Manuel Franceschini | """Notifies that the device will no longer be used for I/O.
|
1384 | 6f695a2e | Manuel Franceschini |
|
1385 | 6f695a2e | Manuel Franceschini | This is a no-op for the file type.
|
1386 | 6f695a2e | Manuel Franceschini |
|
1387 | 6f695a2e | Manuel Franceschini | """
|
1388 | 6f695a2e | Manuel Franceschini | pass
|
1389 | 6f695a2e | Manuel Franceschini | |
1390 | 6f695a2e | Manuel Franceschini | def Remove(self): |
1391 | 6f695a2e | Manuel Franceschini | """Remove the file backing the block device.
|
1392 | 6f695a2e | Manuel Franceschini |
|
1393 | 6f695a2e | Manuel Franceschini | Returns:
|
1394 | 6f695a2e | Manuel Franceschini | boolean indicating wheter removal of file was successful or not.
|
1395 | 6f695a2e | Manuel Franceschini |
|
1396 | 6f695a2e | Manuel Franceschini | """
|
1397 | 6f695a2e | Manuel Franceschini | if not os.path.exists(self.dev_path): |
1398 | 6f695a2e | Manuel Franceschini | return True |
1399 | 6f695a2e | Manuel Franceschini | try:
|
1400 | 6f695a2e | Manuel Franceschini | os.remove(self.dev_path)
|
1401 | 6f695a2e | Manuel Franceschini | return True |
1402 | 6f695a2e | Manuel Franceschini | except OSError, err: |
1403 | 6f695a2e | Manuel Franceschini | logger.Error("Can't remove file '%s': %s"
|
1404 | 6f695a2e | Manuel Franceschini | % (self.dev_path, err))
|
1405 | 6f695a2e | Manuel Franceschini | return False |
1406 | 6f695a2e | Manuel Franceschini | |
1407 | 6f695a2e | Manuel Franceschini | def Attach(self): |
1408 | 6f695a2e | Manuel Franceschini | """Attach to an existing file.
|
1409 | 6f695a2e | Manuel Franceschini |
|
1410 | 6f695a2e | Manuel Franceschini | Check if this file already exists.
|
1411 | 6f695a2e | Manuel Franceschini |
|
1412 | 6f695a2e | Manuel Franceschini | Returns:
|
1413 | 6f695a2e | Manuel Franceschini | boolean indicating if file exists or not.
|
1414 | 6f695a2e | Manuel Franceschini |
|
1415 | 6f695a2e | Manuel Franceschini | """
|
1416 | 6f695a2e | Manuel Franceschini | if os.path.exists(self.dev_path): |
1417 | 6f695a2e | Manuel Franceschini | return True |
1418 | 6f695a2e | Manuel Franceschini | return False |
1419 | 6f695a2e | Manuel Franceschini | |
1420 | 6f695a2e | Manuel Franceschini | @classmethod
|
1421 | 6f695a2e | Manuel Franceschini | def Create(cls, unique_id, children, size): |
1422 | 6f695a2e | Manuel Franceschini | """Create a new file.
|
1423 | 6f695a2e | Manuel Franceschini |
|
1424 | 6f695a2e | Manuel Franceschini | Args:
|
1425 | 6f695a2e | Manuel Franceschini | children:
|
1426 | 6f695a2e | Manuel Franceschini | size: integer size of file in MiB
|
1427 | 6f695a2e | Manuel Franceschini |
|
1428 | 6f695a2e | Manuel Franceschini | Returns:
|
1429 | 6f695a2e | Manuel Franceschini | A ganeti.bdev.FileStorage object.
|
1430 | 6f695a2e | Manuel Franceschini |
|
1431 | 6f695a2e | Manuel Franceschini | """
|
1432 | 6f695a2e | Manuel Franceschini | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
1433 | 6f695a2e | Manuel Franceschini | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1434 | 6f695a2e | Manuel Franceschini | dev_path = unique_id[1]
|
1435 | 6f695a2e | Manuel Franceschini | try:
|
1436 | 6f695a2e | Manuel Franceschini | f = open(dev_path, 'w') |
1437 | 6f695a2e | Manuel Franceschini | except IOError, err: |
1438 | b62ddbe5 | Guido Trotter | raise errors.BlockDeviceError("Could not create '%'" % err) |
1439 | 6f695a2e | Manuel Franceschini | else:
|
1440 | 6f695a2e | Manuel Franceschini | f.truncate(size * 1024 * 1024) |
1441 | 6f695a2e | Manuel Franceschini | f.close() |
1442 | 6f695a2e | Manuel Franceschini | |
1443 | 6f695a2e | Manuel Franceschini | return FileStorage(unique_id, children)
|
1444 | 6f695a2e | Manuel Franceschini | |
1445 | 6f695a2e | Manuel Franceschini | |
1446 | a8083063 | Iustin Pop | DEV_MAP = { |
1447 | fe96220b | Iustin Pop | constants.LD_LV: LogicalVolume, |
1448 | a1f445d3 | Iustin Pop | constants.LD_DRBD8: DRBD8, |
1449 | 6f695a2e | Manuel Franceschini | constants.LD_FILE: FileStorage, |
1450 | a8083063 | Iustin Pop | } |
1451 | a8083063 | Iustin Pop | |
1452 | a8083063 | Iustin Pop | |
1453 | a8083063 | Iustin Pop | def FindDevice(dev_type, unique_id, children): |
1454 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
1455 | a8083063 | Iustin Pop |
|
1456 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
1457 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
1458 | a8083063 | Iustin Pop |
|
1459 | a8083063 | Iustin Pop | """
|
1460 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1461 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1462 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children) |
1463 | a8083063 | Iustin Pop | if not device.Attach(): |
1464 | a8083063 | Iustin Pop | return None |
1465 | a8083063 | Iustin Pop | return device
|
1466 | a8083063 | Iustin Pop | |
1467 | a8083063 | Iustin Pop | |
1468 | a8083063 | Iustin Pop | def AttachOrAssemble(dev_type, unique_id, children): |
1469 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
1470 | a8083063 | Iustin Pop |
|
1471 | a8083063 | Iustin Pop | This will attach to an existing assembled device or will assemble
|
1472 | a8083063 | Iustin Pop | the device, as needed, to bring it fully up.
|
1473 | a8083063 | Iustin Pop |
|
1474 | a8083063 | Iustin Pop | """
|
1475 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1476 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1477 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children) |
1478 | a8083063 | Iustin Pop | if not device.Attach(): |
1479 | a8083063 | Iustin Pop | device.Assemble() |
1480 | be1ba2bd | Iustin Pop | if not device.Attach(): |
1481 | be1ba2bd | Iustin Pop | raise errors.BlockDeviceError("Can't find a valid block device for" |
1482 | be1ba2bd | Iustin Pop | " %s/%s/%s" %
|
1483 | be1ba2bd | Iustin Pop | (dev_type, unique_id, children)) |
1484 | a8083063 | Iustin Pop | return device
|
1485 | a8083063 | Iustin Pop | |
1486 | a8083063 | Iustin Pop | |
1487 | a8083063 | Iustin Pop | def Create(dev_type, unique_id, children, size): |
1488 | a8083063 | Iustin Pop | """Create a device.
|
1489 | a8083063 | Iustin Pop |
|
1490 | a8083063 | Iustin Pop | """
|
1491 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
1492 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
1493 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type].Create(unique_id, children, size) |
1494 | a8083063 | Iustin Pop | return device |