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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 | a8083063 | Iustin Pop | |
29 | a8083063 | Iustin Pop | from ganeti import utils |
30 | a8083063 | Iustin Pop | from ganeti import logger |
31 | a8083063 | Iustin Pop | from ganeti import errors |
32 | fe96220b | Iustin Pop | from ganeti import constants |
33 | a8083063 | Iustin Pop | |
34 | a8083063 | Iustin Pop | |
35 | a8083063 | Iustin Pop | class BlockDev(object): |
36 | a8083063 | Iustin Pop | """Block device abstract class.
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37 | a8083063 | Iustin Pop |
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38 | a8083063 | Iustin Pop | A block device can be in the following states:
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39 | a8083063 | Iustin Pop | - not existing on the system, and by `Create()` it goes into:
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40 | a8083063 | Iustin Pop | - existing but not setup/not active, and by `Assemble()` goes into:
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41 | a8083063 | Iustin Pop | - active read-write and by `Open()` it goes into
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42 | a8083063 | Iustin Pop | - online (=used, or ready for use)
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43 | a8083063 | Iustin Pop |
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44 | a8083063 | Iustin Pop | A device can also be online but read-only, however we are not using
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45 | a8083063 | Iustin Pop | the readonly state (MD and LV have it, if needed in the future)
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46 | a8083063 | Iustin Pop | and we are usually looking at this like at a stack, so it's easier
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47 | a8083063 | Iustin Pop | to conceptualise the transition from not-existing to online and back
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48 | a8083063 | Iustin Pop | like a linear one.
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49 | a8083063 | Iustin Pop |
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50 | a8083063 | Iustin Pop | The many different states of the device are due to the fact that we
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51 | a8083063 | Iustin Pop | need to cover many device types:
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52 | a8083063 | Iustin Pop | - logical volumes are created, lvchange -a y $lv, and used
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53 | a8083063 | Iustin Pop | - md arrays are created or assembled 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 | The status of the device can be examined by `GetStatus()`, which
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57 | a8083063 | Iustin Pop | returns a numerical value, depending on the position in the
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58 | a8083063 | Iustin Pop | transition stack of the device.
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59 | a8083063 | Iustin Pop |
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60 | a8083063 | Iustin Pop | A block device is identified by three items:
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61 | a8083063 | Iustin Pop | - the /dev path of the device (dynamic)
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62 | a8083063 | Iustin Pop | - a unique ID of the device (static)
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63 | a8083063 | Iustin Pop | - it's major/minor pair (dynamic)
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64 | a8083063 | Iustin Pop |
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65 | a8083063 | Iustin Pop | Not all devices implement both the first two as distinct items. LVM
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66 | a8083063 | Iustin Pop | logical volumes have their unique ID (the pair volume group, logical
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67 | a8083063 | Iustin Pop | volume name) in a 1-to-1 relation to the dev path. For MD devices,
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68 | a8083063 | Iustin Pop | the /dev path is dynamic and the unique ID is the UUID generated at
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69 | a8083063 | Iustin Pop | array creation plus the slave list. For DRBD devices, the /dev path
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70 | a8083063 | Iustin Pop | is again dynamic and the unique id is the pair (host1, dev1),
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71 | a8083063 | Iustin Pop | (host2, dev2).
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72 | a8083063 | Iustin Pop |
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73 | a8083063 | Iustin Pop | You can get to a device in two ways:
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74 | a8083063 | Iustin Pop | - creating the (real) device, which returns you
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75 | a8083063 | Iustin Pop | an attached instance (lvcreate, mdadm --create)
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76 | a8083063 | Iustin Pop | - attaching of a python instance to an existing (real) device
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77 | a8083063 | Iustin Pop |
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78 | a8083063 | Iustin Pop | The second point, the attachement to a device, is different
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79 | a8083063 | Iustin Pop | depending on whether the device is assembled or not. At init() time,
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80 | a8083063 | Iustin Pop | we search for a device with the same unique_id as us. If found,
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81 | a8083063 | Iustin Pop | good. It also means that the device is already assembled. If not,
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82 | a8083063 | Iustin Pop | after assembly we'll have our correct major/minor.
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83 | a8083063 | Iustin Pop |
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84 | a8083063 | Iustin Pop | """
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85 | a8083063 | Iustin Pop | STATUS_UNKNOWN = 0
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86 | a8083063 | Iustin Pop | STATUS_EXISTING = 1
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87 | a8083063 | Iustin Pop | STATUS_STANDBY = 2
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88 | a8083063 | Iustin Pop | STATUS_ONLINE = 3
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89 | a8083063 | Iustin Pop | |
90 | a8083063 | Iustin Pop | STATUS_MAP = { |
91 | a8083063 | Iustin Pop | STATUS_UNKNOWN: "unknown",
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92 | a8083063 | Iustin Pop | STATUS_EXISTING: "existing",
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93 | a8083063 | Iustin Pop | STATUS_STANDBY: "ready for use",
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94 | a8083063 | Iustin Pop | STATUS_ONLINE: "online",
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95 | a8083063 | Iustin Pop | } |
96 | a8083063 | Iustin Pop | |
97 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
98 | a8083063 | Iustin Pop | self._children = children
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99 | a8083063 | Iustin Pop | self.dev_path = None |
100 | a8083063 | Iustin Pop | self.unique_id = unique_id
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101 | a8083063 | Iustin Pop | self.major = None |
102 | a8083063 | Iustin Pop | self.minor = None |
103 | a8083063 | Iustin Pop | |
104 | a8083063 | Iustin Pop | def Assemble(self): |
105 | a8083063 | Iustin Pop | """Assemble the device from its components.
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106 | a8083063 | Iustin Pop |
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107 | a8083063 | Iustin Pop | If this is a plain block device (e.g. LVM) than assemble does
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108 | a8083063 | Iustin Pop | nothing, as the LVM has no children and we don't put logical
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109 | a8083063 | Iustin Pop | volumes offline.
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110 | a8083063 | Iustin Pop |
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111 | a8083063 | Iustin Pop | One guarantee is that after the device has been assembled, it
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112 | a8083063 | Iustin Pop | knows its major/minor numbers. This allows other devices (usually
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113 | a8083063 | Iustin Pop | parents) to probe correctly for their children.
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114 | a8083063 | Iustin Pop |
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115 | a8083063 | Iustin Pop | """
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116 | a8083063 | Iustin Pop | status = True
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117 | a8083063 | Iustin Pop | for child in self._children: |
118 | a8083063 | Iustin Pop | if not isinstance(child, BlockDev): |
119 | a8083063 | Iustin Pop | raise TypeError("Invalid child passed of type '%s'" % type(child)) |
120 | a8083063 | Iustin Pop | if not status: |
121 | a8083063 | Iustin Pop | break
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122 | a8083063 | Iustin Pop | status = status and child.Assemble()
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123 | a8083063 | Iustin Pop | if not status: |
124 | a8083063 | Iustin Pop | break
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125 | a8083063 | Iustin Pop | status = status and child.Open()
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126 | a8083063 | Iustin Pop | |
127 | a8083063 | Iustin Pop | if not status: |
128 | a8083063 | Iustin Pop | for child in self._children: |
129 | a8083063 | Iustin Pop | child.Shutdown() |
130 | a8083063 | Iustin Pop | return status
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131 | a8083063 | Iustin Pop | |
132 | a8083063 | Iustin Pop | def Attach(self): |
133 | a8083063 | Iustin Pop | """Find a device which matches our config and attach to it.
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134 | a8083063 | Iustin Pop |
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135 | a8083063 | Iustin Pop | """
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136 | a8083063 | Iustin Pop | raise NotImplementedError |
137 | a8083063 | Iustin Pop | |
138 | a8083063 | Iustin Pop | def Close(self): |
139 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
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140 | a8083063 | Iustin Pop |
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141 | a8083063 | Iustin Pop | """
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142 | a8083063 | Iustin Pop | raise NotImplementedError |
143 | a8083063 | Iustin Pop | |
144 | a8083063 | Iustin Pop | @classmethod
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145 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
146 | a8083063 | Iustin Pop | """Create the device.
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147 | a8083063 | Iustin Pop |
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148 | a8083063 | Iustin Pop | If the device cannot be created, it will return None
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149 | a8083063 | Iustin Pop | instead. Error messages go to the logging system.
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150 | a8083063 | Iustin Pop |
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151 | a8083063 | Iustin Pop | Note that for some devices, the unique_id is used, and for other,
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152 | a8083063 | Iustin Pop | the children. The idea is that these two, taken together, are
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153 | a8083063 | Iustin Pop | enough for both creation and assembly (later).
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154 | a8083063 | Iustin Pop |
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155 | a8083063 | Iustin Pop | """
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156 | a8083063 | Iustin Pop | raise NotImplementedError |
157 | a8083063 | Iustin Pop | |
158 | a8083063 | Iustin Pop | def Remove(self): |
159 | a8083063 | Iustin Pop | """Remove this device.
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160 | a8083063 | Iustin Pop |
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161 | a8083063 | Iustin Pop | This makes sense only for some of the device types: LV and to a
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162 | a8083063 | Iustin Pop | lesser degree, md devices. Also note that if the device can't
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163 | a8083063 | Iustin Pop | attach, the removal can't be completed.
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164 | a8083063 | Iustin Pop |
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165 | a8083063 | Iustin Pop | """
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166 | a8083063 | Iustin Pop | raise NotImplementedError |
167 | a8083063 | Iustin Pop | |
168 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
169 | f3e513ad | Iustin Pop | """Rename this device.
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170 | f3e513ad | Iustin Pop |
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171 | f3e513ad | Iustin Pop | This may or may not make sense for a given device type.
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172 | f3e513ad | Iustin Pop |
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173 | f3e513ad | Iustin Pop | """
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174 | f3e513ad | Iustin Pop | raise NotImplementedError |
175 | f3e513ad | Iustin Pop | |
176 | a8083063 | Iustin Pop | def GetStatus(self): |
177 | a8083063 | Iustin Pop | """Return the status of the device.
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178 | a8083063 | Iustin Pop |
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179 | a8083063 | Iustin Pop | """
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180 | a8083063 | Iustin Pop | raise NotImplementedError |
181 | a8083063 | Iustin Pop | |
182 | a8083063 | Iustin Pop | def Open(self, force=False): |
183 | a8083063 | Iustin Pop | """Make the device ready for use.
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184 | a8083063 | Iustin Pop |
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185 | a8083063 | Iustin Pop | This makes the device ready for I/O. For now, just the DRBD
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186 | a8083063 | Iustin Pop | devices need this.
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187 | a8083063 | Iustin Pop |
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188 | a8083063 | Iustin Pop | The force parameter signifies that if the device has any kind of
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189 | a8083063 | Iustin Pop | --force thing, it should be used, we know what we are doing.
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190 | a8083063 | Iustin Pop |
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191 | a8083063 | Iustin Pop | """
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192 | a8083063 | Iustin Pop | raise NotImplementedError |
193 | a8083063 | Iustin Pop | |
194 | a8083063 | Iustin Pop | def Shutdown(self): |
195 | a8083063 | Iustin Pop | """Shut down the device, freeing its children.
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196 | a8083063 | Iustin Pop |
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197 | a8083063 | Iustin Pop | This undoes the `Assemble()` work, except for the child
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198 | a8083063 | Iustin Pop | assembling; as such, the children on the device are still
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199 | a8083063 | Iustin Pop | assembled after this call.
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200 | a8083063 | Iustin Pop |
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201 | a8083063 | Iustin Pop | """
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202 | a8083063 | Iustin Pop | raise NotImplementedError |
203 | a8083063 | Iustin Pop | |
204 | a8083063 | Iustin Pop | def SetSyncSpeed(self, speed): |
205 | a8083063 | Iustin Pop | """Adjust the sync speed of the mirror.
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206 | a8083063 | Iustin Pop |
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207 | a8083063 | Iustin Pop | In case this is not a mirroring device, this is no-op.
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208 | a8083063 | Iustin Pop |
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209 | a8083063 | Iustin Pop | """
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210 | a8083063 | Iustin Pop | result = True
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211 | a8083063 | Iustin Pop | if self._children: |
212 | a8083063 | Iustin Pop | for child in self._children: |
213 | a8083063 | Iustin Pop | result = result and child.SetSyncSpeed(speed)
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214 | a8083063 | Iustin Pop | return result
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215 | a8083063 | Iustin Pop | |
216 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
217 | a8083063 | Iustin Pop | """Returns the sync status of the device.
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218 | a8083063 | Iustin Pop |
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219 | a8083063 | Iustin Pop | If this device is a mirroring device, this function returns the
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220 | a8083063 | Iustin Pop | status of the mirror.
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221 | a8083063 | Iustin Pop |
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222 | a8083063 | Iustin Pop | Returns:
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223 | a8083063 | Iustin Pop | (sync_percent, estimated_time, is_degraded)
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224 | a8083063 | Iustin Pop |
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225 | a8083063 | Iustin Pop | If sync_percent is None, it means all is ok
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226 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't estimate
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227 | a8083063 | Iustin Pop | the time needed, otherwise it's the time left in seconds
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228 | a8083063 | Iustin Pop | If is_degraded is True, it means the device is missing
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229 | a8083063 | Iustin Pop | redundancy. This is usually a sign that something went wrong in
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230 | a8083063 | Iustin Pop | the device setup, if sync_percent is None.
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231 | a8083063 | Iustin Pop |
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232 | a8083063 | Iustin Pop | """
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233 | a8083063 | Iustin Pop | return None, None, False |
234 | a8083063 | Iustin Pop | |
235 | a8083063 | Iustin Pop | |
236 | a8083063 | Iustin Pop | def CombinedSyncStatus(self): |
237 | a8083063 | Iustin Pop | """Calculate the mirror status recursively for our children.
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238 | a8083063 | Iustin Pop |
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239 | a8083063 | Iustin Pop | The return value is the same as for `GetSyncStatus()` except the
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240 | a8083063 | Iustin Pop | minimum percent and maximum time are calculated across our
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241 | a8083063 | Iustin Pop | children.
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242 | a8083063 | Iustin Pop |
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243 | a8083063 | Iustin Pop | """
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244 | a8083063 | Iustin Pop | min_percent, max_time, is_degraded = self.GetSyncStatus()
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245 | a8083063 | Iustin Pop | if self._children: |
246 | a8083063 | Iustin Pop | for child in self._children: |
247 | a8083063 | Iustin Pop | c_percent, c_time, c_degraded = child.GetSyncStatus() |
248 | a8083063 | Iustin Pop | if min_percent is None: |
249 | a8083063 | Iustin Pop | min_percent = c_percent |
250 | a8083063 | Iustin Pop | elif c_percent is not None: |
251 | a8083063 | Iustin Pop | min_percent = min(min_percent, c_percent)
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252 | a8083063 | Iustin Pop | if max_time is None: |
253 | a8083063 | Iustin Pop | max_time = c_time |
254 | a8083063 | Iustin Pop | elif c_time is not None: |
255 | a8083063 | Iustin Pop | max_time = max(max_time, c_time)
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256 | a8083063 | Iustin Pop | is_degraded = is_degraded or c_degraded
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257 | a8083063 | Iustin Pop | return min_percent, max_time, is_degraded
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258 | a8083063 | Iustin Pop | |
259 | a8083063 | Iustin Pop | |
260 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
261 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
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262 | a0c3fea1 | Michael Hanselmann |
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263 | a0c3fea1 | Michael Hanselmann | Only supported for some device types.
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264 | a0c3fea1 | Michael Hanselmann |
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265 | a0c3fea1 | Michael Hanselmann | """
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266 | a0c3fea1 | Michael Hanselmann | for child in self._children: |
267 | a0c3fea1 | Michael Hanselmann | child.SetInfo(text) |
268 | a0c3fea1 | Michael Hanselmann | |
269 | a0c3fea1 | Michael Hanselmann | |
270 | a8083063 | Iustin Pop | def __repr__(self): |
271 | a8083063 | Iustin Pop | return ("<%s: unique_id: %s, children: %s, %s:%s, %s>" % |
272 | a8083063 | Iustin Pop | (self.__class__, self.unique_id, self._children, |
273 | a8083063 | Iustin Pop | self.major, self.minor, self.dev_path)) |
274 | a8083063 | Iustin Pop | |
275 | a8083063 | Iustin Pop | |
276 | a8083063 | Iustin Pop | class LogicalVolume(BlockDev): |
277 | a8083063 | Iustin Pop | """Logical Volume block device.
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278 | a8083063 | Iustin Pop |
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279 | a8083063 | Iustin Pop | """
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280 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
281 | a8083063 | Iustin Pop | """Attaches to a LV device.
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282 | a8083063 | Iustin Pop |
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283 | a8083063 | Iustin Pop | The unique_id is a tuple (vg_name, lv_name)
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284 | a8083063 | Iustin Pop |
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285 | a8083063 | Iustin Pop | """
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286 | a8083063 | Iustin Pop | super(LogicalVolume, self).__init__(unique_id, children) |
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 | self._vg_name, self._lv_name = unique_id |
290 | a8083063 | Iustin Pop | self.dev_path = "/dev/%s/%s" % (self._vg_name, self._lv_name) |
291 | a8083063 | Iustin Pop | self.Attach()
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292 | a8083063 | Iustin Pop | |
293 | a8083063 | Iustin Pop | |
294 | a8083063 | Iustin Pop | @classmethod
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295 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
296 | a8083063 | Iustin Pop | """Create a new logical volume.
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297 | a8083063 | Iustin Pop |
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298 | a8083063 | Iustin Pop | """
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299 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
300 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
301 | a8083063 | Iustin Pop | vg_name, lv_name = unique_id |
302 | a8083063 | Iustin Pop | pvs_info = cls.GetPVInfo(vg_name) |
303 | a8083063 | Iustin Pop | if not pvs_info: |
304 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't compute PV info for vg %s" % |
305 | 3ecf6786 | Iustin Pop | vg_name) |
306 | a8083063 | Iustin Pop | pvs_info.sort() |
307 | a8083063 | Iustin Pop | pvs_info.reverse() |
308 | 5b7b5d49 | Guido Trotter | |
309 | 5b7b5d49 | Guido Trotter | pvlist = [ pv[1] for pv in pvs_info ] |
310 | 5b7b5d49 | Guido Trotter | free_size = sum([ pv[0] for pv in pvs_info ]) |
311 | 5b7b5d49 | Guido Trotter | |
312 | 5b7b5d49 | Guido Trotter | # The size constraint should have been checked from the master before
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313 | 5b7b5d49 | Guido Trotter | # calling the create function.
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314 | a8083063 | Iustin Pop | if free_size < size:
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315 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Not enough free space: required %s," |
316 | 3ecf6786 | Iustin Pop | " available %s" % (size, free_size))
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317 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-n%s" % lv_name, |
318 | 5b7b5d49 | Guido Trotter | vg_name] + pvlist) |
319 | a8083063 | Iustin Pop | if result.failed:
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320 | a8083063 | Iustin Pop | raise errors.BlockDeviceError(result.fail_reason)
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321 | a8083063 | Iustin Pop | return LogicalVolume(unique_id, children)
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322 | a8083063 | Iustin Pop | |
323 | a8083063 | Iustin Pop | @staticmethod
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324 | a8083063 | Iustin Pop | def GetPVInfo(vg_name): |
325 | a8083063 | Iustin Pop | """Get the free space info for PVs in a volume group.
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326 | a8083063 | Iustin Pop |
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327 | a8083063 | Iustin Pop | Args:
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328 | a8083063 | Iustin Pop | vg_name: the volume group name
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329 | a8083063 | Iustin Pop |
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330 | a8083063 | Iustin Pop | Returns:
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331 | a8083063 | Iustin Pop | list of (free_space, name) with free_space in mebibytes
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332 | 098c0958 | Michael Hanselmann |
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333 | a8083063 | Iustin Pop | """
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334 | a8083063 | Iustin Pop | command = ["pvs", "--noheadings", "--nosuffix", "--units=m", |
335 | a8083063 | Iustin Pop | "-opv_name,vg_name,pv_free,pv_attr", "--unbuffered", |
336 | a8083063 | Iustin Pop | "--separator=:"]
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337 | a8083063 | Iustin Pop | result = utils.RunCmd(command) |
338 | a8083063 | Iustin Pop | if result.failed:
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339 | a8083063 | Iustin Pop | logger.Error("Can't get the PV information: %s" % result.fail_reason)
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340 | a8083063 | Iustin Pop | return None |
341 | a8083063 | Iustin Pop | data = [] |
342 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
343 | a8083063 | Iustin Pop | fields = line.strip().split(':')
|
344 | a8083063 | Iustin Pop | if len(fields) != 4: |
345 | a8083063 | Iustin Pop | logger.Error("Can't parse pvs output: line '%s'" % line)
|
346 | a8083063 | Iustin Pop | return None |
347 | a8083063 | Iustin Pop | # skip over pvs from another vg or ones which are not allocatable
|
348 | a8083063 | Iustin Pop | if fields[1] != vg_name or fields[3][0] != 'a': |
349 | a8083063 | Iustin Pop | continue
|
350 | a8083063 | Iustin Pop | data.append((float(fields[2]), fields[0])) |
351 | a8083063 | Iustin Pop | |
352 | a8083063 | Iustin Pop | return data
|
353 | a8083063 | Iustin Pop | |
354 | a8083063 | Iustin Pop | def Remove(self): |
355 | a8083063 | Iustin Pop | """Remove this logical volume.
|
356 | a8083063 | Iustin Pop |
|
357 | a8083063 | Iustin Pop | """
|
358 | a8083063 | Iustin Pop | if not self.minor and not self.Attach(): |
359 | a8083063 | Iustin Pop | # the LV does not exist
|
360 | a8083063 | Iustin Pop | return True |
361 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvremove", "-f", "%s/%s" % |
362 | a8083063 | Iustin Pop | (self._vg_name, self._lv_name)]) |
363 | a8083063 | Iustin Pop | if result.failed:
|
364 | a8083063 | Iustin Pop | logger.Error("Can't lvremove: %s" % result.fail_reason)
|
365 | a8083063 | Iustin Pop | |
366 | a8083063 | Iustin Pop | return not result.failed |
367 | a8083063 | Iustin Pop | |
368 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
369 | f3e513ad | Iustin Pop | """Rename this logical volume.
|
370 | f3e513ad | Iustin Pop |
|
371 | f3e513ad | Iustin Pop | """
|
372 | f3e513ad | Iustin Pop | if not isinstance(new_id, (tuple, list)) or len(new_id) != 2: |
373 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Invalid new logical id '%s'" % new_id) |
374 | f3e513ad | Iustin Pop | new_vg, new_name = new_id |
375 | f3e513ad | Iustin Pop | if new_vg != self._vg_name: |
376 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't move a logical volume across" |
377 | f3e513ad | Iustin Pop | " volume groups (from %s to to %s)" %
|
378 | f3e513ad | Iustin Pop | (self._vg_name, new_vg))
|
379 | f3e513ad | Iustin Pop | result = utils.RunCmd(["lvrename", new_vg, self._lv_name, new_name]) |
380 | f3e513ad | Iustin Pop | if result.failed:
|
381 | f3e513ad | Iustin Pop | raise errors.BlockDeviceError("Failed to rename the logical volume: %s" % |
382 | f3e513ad | Iustin Pop | result.output) |
383 | a8083063 | Iustin Pop | |
384 | a8083063 | Iustin Pop | def Attach(self): |
385 | a8083063 | Iustin Pop | """Attach to an existing LV.
|
386 | a8083063 | Iustin Pop |
|
387 | a8083063 | Iustin Pop | This method will try to see if an existing and active LV exists
|
388 | a8083063 | Iustin Pop | which matches the our name. If so, its major/minor will be
|
389 | a8083063 | Iustin Pop | recorded.
|
390 | a8083063 | Iustin Pop |
|
391 | a8083063 | Iustin Pop | """
|
392 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvdisplay", self.dev_path]) |
393 | a8083063 | Iustin Pop | if result.failed:
|
394 | a8083063 | Iustin Pop | logger.Error("Can't find LV %s: %s" %
|
395 | a8083063 | Iustin Pop | (self.dev_path, result.fail_reason))
|
396 | a8083063 | Iustin Pop | return False |
397 | a8083063 | Iustin Pop | match = re.compile("^ *Block device *([0-9]+):([0-9]+).*$")
|
398 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
399 | a8083063 | Iustin Pop | match_result = match.match(line) |
400 | a8083063 | Iustin Pop | if match_result:
|
401 | a8083063 | Iustin Pop | self.major = int(match_result.group(1)) |
402 | a8083063 | Iustin Pop | self.minor = int(match_result.group(2)) |
403 | a8083063 | Iustin Pop | return True |
404 | a8083063 | Iustin Pop | return False |
405 | a8083063 | Iustin Pop | |
406 | a8083063 | Iustin Pop | def Assemble(self): |
407 | a8083063 | Iustin Pop | """Assemble the device.
|
408 | a8083063 | Iustin Pop |
|
409 | a8083063 | Iustin Pop | This is a no-op for the LV device type. Eventually, we could
|
410 | a8083063 | Iustin Pop | lvchange -ay here if we see that the LV is not active.
|
411 | a8083063 | Iustin Pop |
|
412 | a8083063 | Iustin Pop | """
|
413 | a8083063 | Iustin Pop | return True |
414 | a8083063 | Iustin Pop | |
415 | a8083063 | Iustin Pop | def Shutdown(self): |
416 | a8083063 | Iustin Pop | """Shutdown the device.
|
417 | a8083063 | Iustin Pop |
|
418 | a8083063 | Iustin Pop | This is a no-op for the LV device type, as we don't deactivate the
|
419 | a8083063 | Iustin Pop | volumes on shutdown.
|
420 | a8083063 | Iustin Pop |
|
421 | a8083063 | Iustin Pop | """
|
422 | a8083063 | Iustin Pop | return True |
423 | a8083063 | Iustin Pop | |
424 | a8083063 | Iustin Pop | def GetStatus(self): |
425 | a8083063 | Iustin Pop | """Return the status of the device.
|
426 | a8083063 | Iustin Pop |
|
427 | a8083063 | Iustin Pop | Logical volumes will can be in all four states, although we don't
|
428 | a8083063 | Iustin Pop | deactivate (lvchange -an) them when shutdown, so STATUS_EXISTING
|
429 | a8083063 | Iustin Pop | should not be seen for our devices.
|
430 | a8083063 | Iustin Pop |
|
431 | a8083063 | Iustin Pop | """
|
432 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvs", "--noheadings", "-olv_attr", self.dev_path]) |
433 | a8083063 | Iustin Pop | if result.failed:
|
434 | a8083063 | Iustin Pop | logger.Error("Can't display lv: %s" % result.fail_reason)
|
435 | a8083063 | Iustin Pop | return self.STATUS_UNKNOWN |
436 | a8083063 | Iustin Pop | out = result.stdout.strip() |
437 | a8083063 | Iustin Pop | # format: type/permissions/alloc/fixed_minor/state/open
|
438 | a8083063 | Iustin Pop | if len(out) != 6: |
439 | a8083063 | Iustin Pop | return self.STATUS_UNKNOWN |
440 | a8083063 | Iustin Pop | #writable = (out[1] == "w")
|
441 | a8083063 | Iustin Pop | active = (out[4] == "a") |
442 | a8083063 | Iustin Pop | online = (out[5] == "o") |
443 | a8083063 | Iustin Pop | if online:
|
444 | a8083063 | Iustin Pop | retval = self.STATUS_ONLINE
|
445 | a8083063 | Iustin Pop | elif active:
|
446 | a8083063 | Iustin Pop | retval = self.STATUS_STANDBY
|
447 | a8083063 | Iustin Pop | else:
|
448 | a8083063 | Iustin Pop | retval = self.STATUS_EXISTING
|
449 | a8083063 | Iustin Pop | |
450 | a8083063 | Iustin Pop | return retval
|
451 | a8083063 | Iustin Pop | |
452 | a8083063 | Iustin Pop | def Open(self, force=False): |
453 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
454 | a8083063 | Iustin Pop |
|
455 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
456 | a8083063 | Iustin Pop |
|
457 | a8083063 | Iustin Pop | """
|
458 | a8083063 | Iustin Pop | return True |
459 | a8083063 | Iustin Pop | |
460 | a8083063 | Iustin Pop | def Close(self): |
461 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
462 | a8083063 | Iustin Pop |
|
463 | a8083063 | Iustin Pop | This is a no-op for the LV device type.
|
464 | a8083063 | Iustin Pop |
|
465 | a8083063 | Iustin Pop | """
|
466 | a8083063 | Iustin Pop | return True |
467 | a8083063 | Iustin Pop | |
468 | a8083063 | Iustin Pop | def Snapshot(self, size): |
469 | a8083063 | Iustin Pop | """Create a snapshot copy of an lvm block device.
|
470 | a8083063 | Iustin Pop |
|
471 | a8083063 | Iustin Pop | """
|
472 | a8083063 | Iustin Pop | snap_name = self._lv_name + ".snap" |
473 | a8083063 | Iustin Pop | |
474 | a8083063 | Iustin Pop | # remove existing snapshot if found
|
475 | a8083063 | Iustin Pop | snap = LogicalVolume((self._vg_name, snap_name), None) |
476 | a8083063 | Iustin Pop | snap.Remove() |
477 | a8083063 | Iustin Pop | |
478 | a8083063 | Iustin Pop | pvs_info = self.GetPVInfo(self._vg_name) |
479 | a8083063 | Iustin Pop | if not pvs_info: |
480 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't compute PV info for vg %s" % |
481 | 3ecf6786 | Iustin Pop | self._vg_name)
|
482 | a8083063 | Iustin Pop | pvs_info.sort() |
483 | a8083063 | Iustin Pop | pvs_info.reverse() |
484 | a8083063 | Iustin Pop | free_size, pv_name = pvs_info[0]
|
485 | a8083063 | Iustin Pop | if free_size < size:
|
486 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Not enough free space: required %s," |
487 | 3ecf6786 | Iustin Pop | " available %s" % (size, free_size))
|
488 | a8083063 | Iustin Pop | |
489 | a8083063 | Iustin Pop | result = utils.RunCmd(["lvcreate", "-L%dm" % size, "-s", |
490 | a8083063 | Iustin Pop | "-n%s" % snap_name, self.dev_path]) |
491 | a8083063 | Iustin Pop | if result.failed:
|
492 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("command: %s error: %s" % |
493 | 3ecf6786 | Iustin Pop | (result.cmd, result.fail_reason)) |
494 | a8083063 | Iustin Pop | |
495 | a8083063 | Iustin Pop | return snap_name
|
496 | a8083063 | Iustin Pop | |
497 | a0c3fea1 | Michael Hanselmann | def SetInfo(self, text): |
498 | a0c3fea1 | Michael Hanselmann | """Update metadata with info text.
|
499 | a0c3fea1 | Michael Hanselmann |
|
500 | a0c3fea1 | Michael Hanselmann | """
|
501 | a0c3fea1 | Michael Hanselmann | BlockDev.SetInfo(self, text)
|
502 | a0c3fea1 | Michael Hanselmann | |
503 | a0c3fea1 | Michael Hanselmann | # Replace invalid characters
|
504 | a0c3fea1 | Michael Hanselmann | text = re.sub('^[^A-Za-z0-9_+.]', '_', text) |
505 | a0c3fea1 | Michael Hanselmann | text = re.sub('[^-A-Za-z0-9_+.]', '_', text) |
506 | a0c3fea1 | Michael Hanselmann | |
507 | a0c3fea1 | Michael Hanselmann | # Only up to 128 characters are allowed
|
508 | a0c3fea1 | Michael Hanselmann | text = text[:128]
|
509 | a0c3fea1 | Michael Hanselmann | |
510 | a0c3fea1 | Michael Hanselmann | result = utils.RunCmd(["lvchange", "--addtag", text, |
511 | a0c3fea1 | Michael Hanselmann | self.dev_path])
|
512 | a0c3fea1 | Michael Hanselmann | if result.failed:
|
513 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Command: %s error: %s" % |
514 | 3ecf6786 | Iustin Pop | (result.cmd, result.fail_reason)) |
515 | a0c3fea1 | Michael Hanselmann | |
516 | a0c3fea1 | Michael Hanselmann | |
517 | a8083063 | Iustin Pop | class MDRaid1(BlockDev): |
518 | a8083063 | Iustin Pop | """raid1 device implemented via md.
|
519 | a8083063 | Iustin Pop |
|
520 | a8083063 | Iustin Pop | """
|
521 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
522 | a8083063 | Iustin Pop | super(MDRaid1, self).__init__(unique_id, children) |
523 | a8083063 | Iustin Pop | self.major = 9 |
524 | a8083063 | Iustin Pop | self.Attach()
|
525 | a8083063 | Iustin Pop | |
526 | a8083063 | Iustin Pop | def Attach(self): |
527 | a8083063 | Iustin Pop | """Find an array which matches our config and attach to it.
|
528 | a8083063 | Iustin Pop |
|
529 | a8083063 | Iustin Pop | This tries to find a MD array which has the same UUID as our own.
|
530 | a8083063 | Iustin Pop |
|
531 | a8083063 | Iustin Pop | """
|
532 | a8083063 | Iustin Pop | minor = self._FindMDByUUID(self.unique_id) |
533 | a8083063 | Iustin Pop | if minor is not None: |
534 | a8083063 | Iustin Pop | self._SetFromMinor(minor)
|
535 | a8083063 | Iustin Pop | else:
|
536 | a8083063 | Iustin Pop | self.minor = None |
537 | a8083063 | Iustin Pop | self.dev_path = None |
538 | a8083063 | Iustin Pop | |
539 | a8083063 | Iustin Pop | return (minor is not None) |
540 | a8083063 | Iustin Pop | |
541 | a8083063 | Iustin Pop | @staticmethod
|
542 | a8083063 | Iustin Pop | def _GetUsedDevs(): |
543 | a8083063 | Iustin Pop | """Compute the list of in-use MD devices.
|
544 | a8083063 | Iustin Pop |
|
545 | a8083063 | Iustin Pop | It doesn't matter if the used device have other raid level, just
|
546 | a8083063 | Iustin Pop | that they are in use.
|
547 | a8083063 | Iustin Pop |
|
548 | a8083063 | Iustin Pop | """
|
549 | a8083063 | Iustin Pop | mdstat = open("/proc/mdstat", "r") |
550 | a8083063 | Iustin Pop | data = mdstat.readlines() |
551 | a8083063 | Iustin Pop | mdstat.close() |
552 | a8083063 | Iustin Pop | |
553 | a8083063 | Iustin Pop | used_md = {} |
554 | a8083063 | Iustin Pop | valid_line = re.compile("^md([0-9]+) : .*$")
|
555 | a8083063 | Iustin Pop | for line in data: |
556 | a8083063 | Iustin Pop | match = valid_line.match(line) |
557 | a8083063 | Iustin Pop | if match:
|
558 | a8083063 | Iustin Pop | md_no = int(match.group(1)) |
559 | a8083063 | Iustin Pop | used_md[md_no] = line |
560 | a8083063 | Iustin Pop | |
561 | a8083063 | Iustin Pop | return used_md
|
562 | a8083063 | Iustin Pop | |
563 | a8083063 | Iustin Pop | @staticmethod
|
564 | a8083063 | Iustin Pop | def _GetDevInfo(minor): |
565 | a8083063 | Iustin Pop | """Get info about a MD device.
|
566 | a8083063 | Iustin Pop |
|
567 | a8083063 | Iustin Pop | Currently only uuid is returned.
|
568 | a8083063 | Iustin Pop |
|
569 | a8083063 | Iustin Pop | """
|
570 | a8083063 | Iustin Pop | result = utils.RunCmd(["mdadm", "-D", "/dev/md%d" % minor]) |
571 | a8083063 | Iustin Pop | if result.failed:
|
572 | a8083063 | Iustin Pop | logger.Error("Can't display md: %s" % result.fail_reason)
|
573 | a8083063 | Iustin Pop | return None |
574 | a8083063 | Iustin Pop | retval = {} |
575 | a8083063 | Iustin Pop | for line in result.stdout.splitlines(): |
576 | a8083063 | Iustin Pop | line = line.strip() |
577 | a8083063 | Iustin Pop | kv = line.split(" : ", 1) |
578 | a8083063 | Iustin Pop | if kv:
|
579 | a8083063 | Iustin Pop | if kv[0] == "UUID": |
580 | 8d519422 | Iustin Pop | retval["uuid"] = kv[1].split()[0] |
581 | a8083063 | Iustin Pop | elif kv[0] == "State": |
582 | a8083063 | Iustin Pop | retval["state"] = kv[1].split(", ") |
583 | a8083063 | Iustin Pop | return retval
|
584 | a8083063 | Iustin Pop | |
585 | a8083063 | Iustin Pop | @staticmethod
|
586 | a8083063 | Iustin Pop | def _FindUnusedMinor(): |
587 | a8083063 | Iustin Pop | """Compute an unused MD minor.
|
588 | a8083063 | Iustin Pop |
|
589 | a8083063 | Iustin Pop | This code assumes that there are 256 minors only.
|
590 | a8083063 | Iustin Pop |
|
591 | a8083063 | Iustin Pop | """
|
592 | a8083063 | Iustin Pop | used_md = MDRaid1._GetUsedDevs() |
593 | a8083063 | Iustin Pop | i = 0
|
594 | a8083063 | Iustin Pop | while i < 256: |
595 | a8083063 | Iustin Pop | if i not in used_md: |
596 | a8083063 | Iustin Pop | break
|
597 | a8083063 | Iustin Pop | i += 1
|
598 | a8083063 | Iustin Pop | if i == 256: |
599 | a8083063 | Iustin Pop | logger.Error("Critical: Out of md minor numbers.")
|
600 | 0caf6485 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free MD minor") |
601 | a8083063 | Iustin Pop | return i
|
602 | a8083063 | Iustin Pop | |
603 | a8083063 | Iustin Pop | @classmethod
|
604 | a8083063 | Iustin Pop | def _FindMDByUUID(cls, uuid): |
605 | a8083063 | Iustin Pop | """Find the minor of an MD array with a given UUID.
|
606 | a8083063 | Iustin Pop |
|
607 | a8083063 | Iustin Pop | """
|
608 | a8083063 | Iustin Pop | md_list = cls._GetUsedDevs() |
609 | a8083063 | Iustin Pop | for minor in md_list: |
610 | a8083063 | Iustin Pop | info = cls._GetDevInfo(minor) |
611 | a8083063 | Iustin Pop | if info and info["uuid"] == uuid: |
612 | a8083063 | Iustin Pop | return minor
|
613 | a8083063 | Iustin Pop | return None |
614 | a8083063 | Iustin Pop | |
615 | 1a87dca7 | Iustin Pop | @staticmethod
|
616 | 1a87dca7 | Iustin Pop | def _ZeroSuperblock(dev_path): |
617 | 1a87dca7 | Iustin Pop | """Zero the possible locations for an MD superblock.
|
618 | 1a87dca7 | Iustin Pop |
|
619 | 1a87dca7 | Iustin Pop | The zero-ing can't be done via ``mdadm --zero-superblock`` as that
|
620 | 1a87dca7 | Iustin Pop | fails in versions 2.x with the same error code as non-writable
|
621 | 1a87dca7 | Iustin Pop | device.
|
622 | 1a87dca7 | Iustin Pop |
|
623 | 1a87dca7 | Iustin Pop | The superblocks are located at (negative values are relative to
|
624 | 1a87dca7 | Iustin Pop | the end of the block device):
|
625 | 1a87dca7 | Iustin Pop | - -128k to end for version 0.90 superblock
|
626 | 1a87dca7 | Iustin Pop | - -8k to -12k for version 1.0 superblock (included in the above)
|
627 | 1a87dca7 | Iustin Pop | - 0k to 4k for version 1.1 superblock
|
628 | 1a87dca7 | Iustin Pop | - 4k to 8k for version 1.2 superblock
|
629 | 1a87dca7 | Iustin Pop |
|
630 | 1a87dca7 | Iustin Pop | To cover all situations, the zero-ing will be:
|
631 | 1a87dca7 | Iustin Pop | - 0k to 128k
|
632 | 1a87dca7 | Iustin Pop | - -128k to end
|
633 | 1a87dca7 | Iustin Pop |
|
634 | 1a87dca7 | Iustin Pop | As such, the minimum device size must be 128k, otherwise we'll get
|
635 | 1a87dca7 | Iustin Pop | I/O errors.
|
636 | 1a87dca7 | Iustin Pop |
|
637 | 1a87dca7 | Iustin Pop | Note that this function depends on the fact that one can open,
|
638 | 1a87dca7 | Iustin Pop | read and write block devices normally.
|
639 | 1a87dca7 | Iustin Pop |
|
640 | 1a87dca7 | Iustin Pop | """
|
641 | 1a87dca7 | Iustin Pop | overwrite_size = 128 * 1024 |
642 | 1a87dca7 | Iustin Pop | empty_buf = '\0' * overwrite_size
|
643 | 1a87dca7 | Iustin Pop | fd = open(dev_path, "r+") |
644 | 1a87dca7 | Iustin Pop | try:
|
645 | 1a87dca7 | Iustin Pop | fd.seek(0, 0) |
646 | 1a87dca7 | Iustin Pop | p1 = fd.tell() |
647 | 1a87dca7 | Iustin Pop | fd.write(empty_buf) |
648 | 1a87dca7 | Iustin Pop | p2 = fd.tell() |
649 | 1a87dca7 | Iustin Pop | logger.Debug("Zeroed %s from %d to %d" % (dev_path, p1, p2))
|
650 | 1a87dca7 | Iustin Pop | fd.seek(-overwrite_size, 2)
|
651 | 1a87dca7 | Iustin Pop | p1 = fd.tell() |
652 | 1a87dca7 | Iustin Pop | fd.write(empty_buf) |
653 | 1a87dca7 | Iustin Pop | p2 = fd.tell() |
654 | 1a87dca7 | Iustin Pop | logger.Debug("Zeroed %s from %d to %d" % (dev_path, p1, p2))
|
655 | 1a87dca7 | Iustin Pop | finally:
|
656 | 1a87dca7 | Iustin Pop | fd.close() |
657 | 1a87dca7 | Iustin Pop | |
658 | a8083063 | Iustin Pop | @classmethod
|
659 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
660 | a8083063 | Iustin Pop | """Create a new MD raid1 array.
|
661 | a8083063 | Iustin Pop |
|
662 | a8083063 | Iustin Pop | """
|
663 | a8083063 | Iustin Pop | if not isinstance(children, (tuple, list)): |
664 | a8083063 | Iustin Pop | raise ValueError("Invalid setup data for MDRaid1 dev: %s" % |
665 | a8083063 | Iustin Pop | str(children))
|
666 | a8083063 | Iustin Pop | for i in children: |
667 | a8083063 | Iustin Pop | if not isinstance(i, BlockDev): |
668 | a8083063 | Iustin Pop | raise ValueError("Invalid member in MDRaid1 dev: %s" % type(i)) |
669 | a8083063 | Iustin Pop | for i in children: |
670 | 1a87dca7 | Iustin Pop | try:
|
671 | 1a87dca7 | Iustin Pop | cls._ZeroSuperblock(i.dev_path) |
672 | 1a87dca7 | Iustin Pop | except EnvironmentError, err: |
673 | 1a87dca7 | Iustin Pop | logger.Error("Can't zero superblock for %s: %s" %
|
674 | 1a87dca7 | Iustin Pop | (i.dev_path, str(err)))
|
675 | a8083063 | Iustin Pop | return None |
676 | a8083063 | Iustin Pop | minor = cls._FindUnusedMinor() |
677 | a8083063 | Iustin Pop | result = utils.RunCmd(["mdadm", "--create", "/dev/md%d" % minor, |
678 | a8083063 | Iustin Pop | "--auto=yes", "--force", "-l1", |
679 | a8083063 | Iustin Pop | "-n%d" % len(children)] + |
680 | a8083063 | Iustin Pop | [dev.dev_path for dev in children]) |
681 | a8083063 | Iustin Pop | |
682 | a8083063 | Iustin Pop | if result.failed:
|
683 | 1a87dca7 | Iustin Pop | logger.Error("Can't create md: %s: %s" % (result.fail_reason,
|
684 | 1a87dca7 | Iustin Pop | result.output)) |
685 | a8083063 | Iustin Pop | return None |
686 | a8083063 | Iustin Pop | info = cls._GetDevInfo(minor) |
687 | a8083063 | Iustin Pop | if not info or not "uuid" in info: |
688 | a8083063 | Iustin Pop | logger.Error("Wrong information returned from mdadm -D: %s" % str(info)) |
689 | a8083063 | Iustin Pop | return None |
690 | a8083063 | Iustin Pop | return MDRaid1(info["uuid"], children) |
691 | a8083063 | Iustin Pop | |
692 | a8083063 | Iustin Pop | def Remove(self): |
693 | a8083063 | Iustin Pop | """Stub remove function for MD RAID 1 arrays.
|
694 | a8083063 | Iustin Pop |
|
695 | a8083063 | Iustin Pop | We don't remove the superblock right now. Mark a to do.
|
696 | a8083063 | Iustin Pop |
|
697 | a8083063 | Iustin Pop | """
|
698 | a8083063 | Iustin Pop | #TODO: maybe zero superblock on child devices?
|
699 | a8083063 | Iustin Pop | return self.Shutdown() |
700 | a8083063 | Iustin Pop | |
701 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
702 | f3e513ad | Iustin Pop | """Rename a device.
|
703 | f3e513ad | Iustin Pop |
|
704 | f3e513ad | Iustin Pop | This is not supported for md raid1 devices.
|
705 | f3e513ad | Iustin Pop |
|
706 | f3e513ad | Iustin Pop | """
|
707 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't rename a md raid1 device") |
708 | a8083063 | Iustin Pop | |
709 | 153d9724 | Iustin Pop | def AddChildren(self, devices): |
710 | 153d9724 | Iustin Pop | """Add new member(s) to the md raid1.
|
711 | a8083063 | Iustin Pop |
|
712 | a8083063 | Iustin Pop | """
|
713 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
714 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device") |
715 | 153d9724 | Iustin Pop | |
716 | 153d9724 | Iustin Pop | args = ["mdadm", "-a", self.dev_path] |
717 | 153d9724 | Iustin Pop | for dev in devices: |
718 | 153d9724 | Iustin Pop | if dev.dev_path is None: |
719 | 153d9724 | Iustin Pop | raise errors.BlockDeviceError("Child '%s' is not initialised" % dev) |
720 | 153d9724 | Iustin Pop | dev.Open() |
721 | 153d9724 | Iustin Pop | args.append(dev.dev_path) |
722 | 153d9724 | Iustin Pop | result = utils.RunCmd(args) |
723 | a8083063 | Iustin Pop | if result.failed:
|
724 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Failed to add new device to array: %s" % |
725 | 3ecf6786 | Iustin Pop | result.output) |
726 | 153d9724 | Iustin Pop | new_len = len(self._children) + len(devices) |
727 | a8083063 | Iustin Pop | result = utils.RunCmd(["mdadm", "--grow", self.dev_path, "-n", new_len]) |
728 | a8083063 | Iustin Pop | if result.failed:
|
729 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't grow md array: %s" % |
730 | 3ecf6786 | Iustin Pop | result.output) |
731 | 153d9724 | Iustin Pop | self._children.extend(devices)
|
732 | a8083063 | Iustin Pop | |
733 | 153d9724 | Iustin Pop | def RemoveChildren(self, devices): |
734 | 153d9724 | Iustin Pop | """Remove member(s) from the md raid1.
|
735 | a8083063 | Iustin Pop |
|
736 | a8083063 | Iustin Pop | """
|
737 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
738 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device") |
739 | 153d9724 | Iustin Pop | new_len = len(self._children) - len(devices) |
740 | 153d9724 | Iustin Pop | if new_len < 1: |
741 | 153d9724 | Iustin Pop | raise errors.BlockDeviceError("Can't reduce to less than one child") |
742 | 153d9724 | Iustin Pop | args = ["mdadm", "-f", self.dev_path] |
743 | 153d9724 | Iustin Pop | orig_devs = [] |
744 | 153d9724 | Iustin Pop | for dev in devices: |
745 | 153d9724 | Iustin Pop | args.append(dev.dev_path) |
746 | 153d9724 | Iustin Pop | for c in self._children: |
747 | 153d9724 | Iustin Pop | if c.dev_path == dev.dev_path:
|
748 | 153d9724 | Iustin Pop | orig_devs.append(c) |
749 | 153d9724 | Iustin Pop | break
|
750 | 153d9724 | Iustin Pop | else:
|
751 | 153d9724 | Iustin Pop | raise errors.BlockDeviceError("Can't find device '%s' for removal" % |
752 | 153d9724 | Iustin Pop | dev) |
753 | 153d9724 | Iustin Pop | result = utils.RunCmd(args) |
754 | a8083063 | Iustin Pop | if result.failed:
|
755 | 153d9724 | Iustin Pop | raise errors.BlockDeviceError("Failed to mark device(s) as failed: %s" % |
756 | 3ecf6786 | Iustin Pop | result.output) |
757 | a8083063 | Iustin Pop | |
758 | a8083063 | Iustin Pop | # it seems here we need a short delay for MD to update its
|
759 | a8083063 | Iustin Pop | # superblocks
|
760 | a8083063 | Iustin Pop | time.sleep(0.5)
|
761 | 153d9724 | Iustin Pop | args[1] = "-r" |
762 | 153d9724 | Iustin Pop | result = utils.RunCmd(args) |
763 | a8083063 | Iustin Pop | if result.failed:
|
764 | 153d9724 | Iustin Pop | raise errors.BlockDeviceError("Failed to remove device(s) from array:" |
765 | 153d9724 | Iustin Pop | " %s" % result.output)
|
766 | a8083063 | Iustin Pop | result = utils.RunCmd(["mdadm", "--grow", "--force", self.dev_path, |
767 | a8083063 | Iustin Pop | "-n", new_len])
|
768 | a8083063 | Iustin Pop | if result.failed:
|
769 | 3ecf6786 | Iustin Pop | raise errors.BlockDeviceError("Can't shrink md array: %s" % |
770 | 3ecf6786 | Iustin Pop | result.output) |
771 | 153d9724 | Iustin Pop | for dev in orig_devs: |
772 | 153d9724 | Iustin Pop | self._children.remove(dev)
|
773 | a8083063 | Iustin Pop | |
774 | a8083063 | Iustin Pop | def GetStatus(self): |
775 | a8083063 | Iustin Pop | """Return the status of the device.
|
776 | a8083063 | Iustin Pop |
|
777 | a8083063 | Iustin Pop | """
|
778 | a8083063 | Iustin Pop | self.Attach()
|
779 | a8083063 | Iustin Pop | if self.minor is None: |
780 | a8083063 | Iustin Pop | retval = self.STATUS_UNKNOWN
|
781 | a8083063 | Iustin Pop | else:
|
782 | a8083063 | Iustin Pop | retval = self.STATUS_ONLINE
|
783 | a8083063 | Iustin Pop | return retval
|
784 | a8083063 | Iustin Pop | |
785 | a8083063 | Iustin Pop | def _SetFromMinor(self, minor): |
786 | a8083063 | Iustin Pop | """Set our parameters based on the given minor.
|
787 | a8083063 | Iustin Pop |
|
788 | a8083063 | Iustin Pop | This sets our minor variable and our dev_path.
|
789 | a8083063 | Iustin Pop |
|
790 | a8083063 | Iustin Pop | """
|
791 | a8083063 | Iustin Pop | self.minor = minor
|
792 | a8083063 | Iustin Pop | self.dev_path = "/dev/md%d" % minor |
793 | a8083063 | Iustin Pop | |
794 | a8083063 | Iustin Pop | def Assemble(self): |
795 | a8083063 | Iustin Pop | """Assemble the MD device.
|
796 | a8083063 | Iustin Pop |
|
797 | a8083063 | Iustin Pop | At this point we should have:
|
798 | a8083063 | Iustin Pop | - list of children devices
|
799 | a8083063 | Iustin Pop | - uuid
|
800 | a8083063 | Iustin Pop |
|
801 | a8083063 | Iustin Pop | """
|
802 | a8083063 | Iustin Pop | result = super(MDRaid1, self).Assemble() |
803 | a8083063 | Iustin Pop | if not result: |
804 | a8083063 | Iustin Pop | return result
|
805 | a8083063 | Iustin Pop | md_list = self._GetUsedDevs()
|
806 | a8083063 | Iustin Pop | for minor in md_list: |
807 | a8083063 | Iustin Pop | info = self._GetDevInfo(minor)
|
808 | a8083063 | Iustin Pop | if info and info["uuid"] == self.unique_id: |
809 | a8083063 | Iustin Pop | self._SetFromMinor(minor)
|
810 | a8083063 | Iustin Pop | logger.Info("MD array %s already started" % str(self)) |
811 | a8083063 | Iustin Pop | return True |
812 | a8083063 | Iustin Pop | free_minor = self._FindUnusedMinor()
|
813 | a8083063 | Iustin Pop | result = utils.RunCmd(["mdadm", "-A", "--auto=yes", "--uuid", |
814 | a8083063 | Iustin Pop | self.unique_id, "/dev/md%d" % free_minor] + |
815 | a8083063 | Iustin Pop | [bdev.dev_path for bdev in self._children]) |
816 | a8083063 | Iustin Pop | if result.failed:
|
817 | 8d519422 | Iustin Pop | logger.Error("Can't assemble MD array: %s: %s" %
|
818 | 8d519422 | Iustin Pop | (result.fail_reason, result.output)) |
819 | a8083063 | Iustin Pop | self.minor = None |
820 | a8083063 | Iustin Pop | else:
|
821 | a8083063 | Iustin Pop | self.minor = free_minor
|
822 | a8083063 | Iustin Pop | return not result.failed |
823 | a8083063 | Iustin Pop | |
824 | a8083063 | Iustin Pop | def Shutdown(self): |
825 | a8083063 | Iustin Pop | """Tear down the MD array.
|
826 | a8083063 | Iustin Pop |
|
827 | a8083063 | Iustin Pop | This does a 'mdadm --stop' so after this command, the array is no
|
828 | a8083063 | Iustin Pop | longer available.
|
829 | a8083063 | Iustin Pop |
|
830 | a8083063 | Iustin Pop | """
|
831 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
832 | a8083063 | Iustin Pop | logger.Info("MD object not attached to a device")
|
833 | a8083063 | Iustin Pop | return True |
834 | a8083063 | Iustin Pop | |
835 | a8083063 | Iustin Pop | result = utils.RunCmd(["mdadm", "--stop", "/dev/md%d" % self.minor]) |
836 | a8083063 | Iustin Pop | if result.failed:
|
837 | a8083063 | Iustin Pop | logger.Error("Can't stop MD array: %s" % result.fail_reason)
|
838 | a8083063 | Iustin Pop | return False |
839 | a8083063 | Iustin Pop | self.minor = None |
840 | a8083063 | Iustin Pop | self.dev_path = None |
841 | a8083063 | Iustin Pop | return True |
842 | a8083063 | Iustin Pop | |
843 | a8083063 | Iustin Pop | def SetSyncSpeed(self, kbytes): |
844 | a8083063 | Iustin Pop | """Set the maximum sync speed for the MD array.
|
845 | a8083063 | Iustin Pop |
|
846 | a8083063 | Iustin Pop | """
|
847 | a8083063 | Iustin Pop | result = super(MDRaid1, self).SetSyncSpeed(kbytes) |
848 | a8083063 | Iustin Pop | if self.minor is None: |
849 | a8083063 | Iustin Pop | logger.Error("MD array not attached to a device")
|
850 | a8083063 | Iustin Pop | return False |
851 | a8083063 | Iustin Pop | f = open("/sys/block/md%d/md/sync_speed_max" % self.minor, "w") |
852 | a8083063 | Iustin Pop | try:
|
853 | a8083063 | Iustin Pop | f.write("%d" % kbytes)
|
854 | a8083063 | Iustin Pop | finally:
|
855 | a8083063 | Iustin Pop | f.close() |
856 | a8083063 | Iustin Pop | f = open("/sys/block/md%d/md/sync_speed_min" % self.minor, "w") |
857 | a8083063 | Iustin Pop | try:
|
858 | a8083063 | Iustin Pop | f.write("%d" % (kbytes/2)) |
859 | a8083063 | Iustin Pop | finally:
|
860 | a8083063 | Iustin Pop | f.close() |
861 | a8083063 | Iustin Pop | return result
|
862 | a8083063 | Iustin Pop | |
863 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
864 | a8083063 | Iustin Pop | """Returns the sync status of the device.
|
865 | a8083063 | Iustin Pop |
|
866 | a8083063 | Iustin Pop | Returns:
|
867 | a8083063 | Iustin Pop | (sync_percent, estimated_time)
|
868 | a8083063 | Iustin Pop |
|
869 | a8083063 | Iustin Pop | If sync_percent is None, it means all is ok
|
870 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't esimate
|
871 | a8083063 | Iustin Pop | the time needed, otherwise it's the time left in seconds
|
872 | a8083063 | Iustin Pop |
|
873 | a8083063 | Iustin Pop | """
|
874 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
875 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device in GetSyncStatus") |
876 | a8083063 | Iustin Pop | dev_info = self._GetDevInfo(self.minor) |
877 | a8083063 | Iustin Pop | is_clean = ("state" in dev_info and |
878 | a8083063 | Iustin Pop | len(dev_info["state"]) == 1 and |
879 | a8083063 | Iustin Pop | dev_info["state"][0] in ("clean", "active")) |
880 | a8083063 | Iustin Pop | sys_path = "/sys/block/md%s/md/" % self.minor |
881 | a8083063 | Iustin Pop | f = file(sys_path + "sync_action") |
882 | a8083063 | Iustin Pop | sync_status = f.readline().strip() |
883 | a8083063 | Iustin Pop | f.close() |
884 | a8083063 | Iustin Pop | if sync_status == "idle": |
885 | a8083063 | Iustin Pop | return None, None, not is_clean |
886 | a8083063 | Iustin Pop | f = file(sys_path + "sync_completed") |
887 | a8083063 | Iustin Pop | sync_completed = f.readline().strip().split(" / ")
|
888 | a8083063 | Iustin Pop | f.close() |
889 | a8083063 | Iustin Pop | if len(sync_completed) != 2: |
890 | a8083063 | Iustin Pop | return 0, None, not is_clean |
891 | a8083063 | Iustin Pop | sync_done, sync_total = [float(i) for i in sync_completed] |
892 | a8083063 | Iustin Pop | sync_percent = 100.0*sync_done/sync_total
|
893 | a8083063 | Iustin Pop | f = file(sys_path + "sync_speed") |
894 | a8083063 | Iustin Pop | sync_speed_k = int(f.readline().strip())
|
895 | a8083063 | Iustin Pop | if sync_speed_k == 0: |
896 | a8083063 | Iustin Pop | time_est = None
|
897 | a8083063 | Iustin Pop | else:
|
898 | a8083063 | Iustin Pop | time_est = (sync_total - sync_done) / 2 / sync_speed_k
|
899 | a8083063 | Iustin Pop | return sync_percent, time_est, not is_clean |
900 | a8083063 | Iustin Pop | |
901 | a8083063 | Iustin Pop | def Open(self, force=False): |
902 | a8083063 | Iustin Pop | """Make the device ready for I/O.
|
903 | a8083063 | Iustin Pop |
|
904 | a8083063 | Iustin Pop | This is a no-op for the MDRaid1 device type, although we could use
|
905 | a8083063 | Iustin Pop | the 2.6.18's new array_state thing.
|
906 | a8083063 | Iustin Pop |
|
907 | a8083063 | Iustin Pop | """
|
908 | a8083063 | Iustin Pop | return True |
909 | a8083063 | Iustin Pop | |
910 | a8083063 | Iustin Pop | def Close(self): |
911 | a8083063 | Iustin Pop | """Notifies that the device will no longer be used for I/O.
|
912 | a8083063 | Iustin Pop |
|
913 | a8083063 | Iustin Pop | This is a no-op for the MDRaid1 device type, but see comment for
|
914 | a8083063 | Iustin Pop | `Open()`.
|
915 | a8083063 | Iustin Pop |
|
916 | a8083063 | Iustin Pop | """
|
917 | a8083063 | Iustin Pop | return True |
918 | a8083063 | Iustin Pop | |
919 | a8083063 | Iustin Pop | |
920 | 0f7f32d9 | Iustin Pop | class BaseDRBD(BlockDev): |
921 | 0f7f32d9 | Iustin Pop | """Base DRBD class.
|
922 | a8083063 | Iustin Pop |
|
923 | 0f7f32d9 | Iustin Pop | This class contains a few bits of common functionality between the
|
924 | 0f7f32d9 | Iustin Pop | 0.7 and 8.x versions of DRBD.
|
925 | 0f7f32d9 | Iustin Pop |
|
926 | 0f7f32d9 | Iustin Pop | """
|
927 | 0f7f32d9 | Iustin Pop | _VERSION_RE = re.compile(r"^version: (\d+)\.(\d+)\.(\d+)"
|
928 | 0f7f32d9 | Iustin Pop | r" \(api:(\d+)/proto:(\d+)\)")
|
929 | 770fe0f9 | Iustin Pop | _DRBD_MAJOR = 147
|
930 | 770fe0f9 | Iustin Pop | _ST_UNCONFIGURED = "Unconfigured"
|
931 | 770fe0f9 | Iustin Pop | _ST_WFCONNECTION = "WFConnection"
|
932 | 770fe0f9 | Iustin Pop | _ST_CONNECTED = "Connected"
|
933 | 0f7f32d9 | Iustin Pop | |
934 | 0f7f32d9 | Iustin Pop | @staticmethod
|
935 | 0f7f32d9 | Iustin Pop | def _GetProcData(): |
936 | 0f7f32d9 | Iustin Pop | """Return data from /proc/drbd.
|
937 | 0f7f32d9 | Iustin Pop |
|
938 | 0f7f32d9 | Iustin Pop | """
|
939 | 0f7f32d9 | Iustin Pop | stat = open("/proc/drbd", "r") |
940 | 0f7f32d9 | Iustin Pop | try:
|
941 | 0f7f32d9 | Iustin Pop | data = stat.read().splitlines() |
942 | 0f7f32d9 | Iustin Pop | finally:
|
943 | 0f7f32d9 | Iustin Pop | stat.close() |
944 | 0f7f32d9 | Iustin Pop | if not data: |
945 | 0f7f32d9 | Iustin Pop | raise errors.BlockDeviceError("Can't read any data from /proc/drbd") |
946 | 0f7f32d9 | Iustin Pop | return data
|
947 | 0f7f32d9 | Iustin Pop | |
948 | 5a47ad20 | Iustin Pop | @staticmethod
|
949 | 5a47ad20 | Iustin Pop | def _MassageProcData(data): |
950 | 5a47ad20 | Iustin Pop | """Transform the output of _GetProdData into a nicer form.
|
951 | 5a47ad20 | Iustin Pop |
|
952 | 5a47ad20 | Iustin Pop | Returns:
|
953 | 5a47ad20 | Iustin Pop | a dictionary of minor: joined lines from /proc/drbd for that minor
|
954 | 5a47ad20 | Iustin Pop |
|
955 | 5a47ad20 | Iustin Pop | """
|
956 | 5a47ad20 | Iustin Pop | lmatch = re.compile("^ *([0-9]+):.*$")
|
957 | 5a47ad20 | Iustin Pop | results = {} |
958 | 5a47ad20 | Iustin Pop | old_minor = old_line = None
|
959 | 5a47ad20 | Iustin Pop | for line in data: |
960 | 5a47ad20 | Iustin Pop | lresult = lmatch.match(line) |
961 | 5a47ad20 | Iustin Pop | if lresult is not None: |
962 | 5a47ad20 | Iustin Pop | if old_minor is not None: |
963 | 5a47ad20 | Iustin Pop | results[old_minor] = old_line |
964 | 5a47ad20 | Iustin Pop | old_minor = int(lresult.group(1)) |
965 | 5a47ad20 | Iustin Pop | old_line = line |
966 | 5a47ad20 | Iustin Pop | else:
|
967 | 5a47ad20 | Iustin Pop | if old_minor is not None: |
968 | 5a47ad20 | Iustin Pop | old_line += " " + line.strip()
|
969 | 5a47ad20 | Iustin Pop | # add last line
|
970 | 5a47ad20 | Iustin Pop | if old_minor is not None: |
971 | 5a47ad20 | Iustin Pop | results[old_minor] = old_line |
972 | 5a47ad20 | Iustin Pop | return results
|
973 | 5a47ad20 | Iustin Pop | |
974 | 0f7f32d9 | Iustin Pop | @classmethod
|
975 | 0f7f32d9 | Iustin Pop | def _GetVersion(cls): |
976 | 0f7f32d9 | Iustin Pop | """Return the DRBD version.
|
977 | 0f7f32d9 | Iustin Pop |
|
978 | 0f7f32d9 | Iustin Pop | This will return a list [k_major, k_minor, k_point, api, proto].
|
979 | 0f7f32d9 | Iustin Pop |
|
980 | 0f7f32d9 | Iustin Pop | """
|
981 | 0f7f32d9 | Iustin Pop | proc_data = cls._GetProcData() |
982 | 0f7f32d9 | Iustin Pop | first_line = proc_data[0].strip()
|
983 | 0f7f32d9 | Iustin Pop | version = cls._VERSION_RE.match(first_line) |
984 | 0f7f32d9 | Iustin Pop | if not version: |
985 | 0f7f32d9 | Iustin Pop | raise errors.BlockDeviceError("Can't parse DRBD version from '%s'" % |
986 | 0f7f32d9 | Iustin Pop | first_line) |
987 | 0f7f32d9 | Iustin Pop | return [int(val) for val in version.groups()] |
988 | 0f7f32d9 | Iustin Pop | |
989 | 770fe0f9 | Iustin Pop | @staticmethod
|
990 | 770fe0f9 | Iustin Pop | def _DevPath(minor): |
991 | 770fe0f9 | Iustin Pop | """Return the path to a drbd device for a given minor.
|
992 | 770fe0f9 | Iustin Pop |
|
993 | 770fe0f9 | Iustin Pop | """
|
994 | 770fe0f9 | Iustin Pop | return "/dev/drbd%d" % minor |
995 | 770fe0f9 | Iustin Pop | |
996 | 770fe0f9 | Iustin Pop | @classmethod
|
997 | 770fe0f9 | Iustin Pop | def _GetUsedDevs(cls): |
998 | 770fe0f9 | Iustin Pop | """Compute the list of used DRBD devices.
|
999 | 770fe0f9 | Iustin Pop |
|
1000 | 770fe0f9 | Iustin Pop | """
|
1001 | 770fe0f9 | Iustin Pop | data = cls._GetProcData() |
1002 | 770fe0f9 | Iustin Pop | |
1003 | 770fe0f9 | Iustin Pop | used_devs = {} |
1004 | 770fe0f9 | Iustin Pop | valid_line = re.compile("^ *([0-9]+): cs:([^ ]+).*$")
|
1005 | 770fe0f9 | Iustin Pop | for line in data: |
1006 | 770fe0f9 | Iustin Pop | match = valid_line.match(line) |
1007 | 770fe0f9 | Iustin Pop | if not match: |
1008 | 770fe0f9 | Iustin Pop | continue
|
1009 | 770fe0f9 | Iustin Pop | minor = int(match.group(1)) |
1010 | 770fe0f9 | Iustin Pop | state = match.group(2)
|
1011 | 770fe0f9 | Iustin Pop | if state == cls._ST_UNCONFIGURED:
|
1012 | 770fe0f9 | Iustin Pop | continue
|
1013 | 770fe0f9 | Iustin Pop | used_devs[minor] = state, line |
1014 | 770fe0f9 | Iustin Pop | |
1015 | 770fe0f9 | Iustin Pop | return used_devs
|
1016 | 770fe0f9 | Iustin Pop | |
1017 | 5a47ad20 | Iustin Pop | def _SetFromMinor(self, minor): |
1018 | 5a47ad20 | Iustin Pop | """Set our parameters based on the given minor.
|
1019 | 5a47ad20 | Iustin Pop |
|
1020 | 5a47ad20 | Iustin Pop | This sets our minor variable and our dev_path.
|
1021 | 5a47ad20 | Iustin Pop |
|
1022 | 5a47ad20 | Iustin Pop | """
|
1023 | 5a47ad20 | Iustin Pop | if minor is None: |
1024 | 5a47ad20 | Iustin Pop | self.minor = self.dev_path = None |
1025 | 5a47ad20 | Iustin Pop | else:
|
1026 | 5a47ad20 | Iustin Pop | self.minor = minor
|
1027 | 5a47ad20 | Iustin Pop | self.dev_path = self._DevPath(minor) |
1028 | 5a47ad20 | Iustin Pop | |
1029 | ae26a287 | Iustin Pop | @staticmethod
|
1030 | ae26a287 | Iustin Pop | def _CheckMetaSize(meta_device): |
1031 | ae26a287 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
1032 | ae26a287 | Iustin Pop |
|
1033 | ae26a287 | Iustin Pop | This currently only check the size, which must be around
|
1034 | ae26a287 | Iustin Pop | 128MiB.
|
1035 | ae26a287 | Iustin Pop |
|
1036 | ae26a287 | Iustin Pop | """
|
1037 | ae26a287 | Iustin Pop | result = utils.RunCmd(["blockdev", "--getsize", meta_device]) |
1038 | ae26a287 | Iustin Pop | if result.failed:
|
1039 | ae26a287 | Iustin Pop | logger.Error("Failed to get device size: %s" % result.fail_reason)
|
1040 | ae26a287 | Iustin Pop | return False |
1041 | ae26a287 | Iustin Pop | try:
|
1042 | ae26a287 | Iustin Pop | sectors = int(result.stdout)
|
1043 | ae26a287 | Iustin Pop | except ValueError: |
1044 | ae26a287 | Iustin Pop | logger.Error("Invalid output from blockdev: '%s'" % result.stdout)
|
1045 | ae26a287 | Iustin Pop | return False |
1046 | ae26a287 | Iustin Pop | bytes = sectors * 512
|
1047 | ae26a287 | Iustin Pop | if bytes < 128 * 1024 * 1024: # less than 128MiB |
1048 | ae26a287 | Iustin Pop | logger.Error("Meta device too small (%.2fMib)" % (bytes / 1024 / 1024)) |
1049 | ae26a287 | Iustin Pop | return False |
1050 | ae26a287 | Iustin Pop | if bytes > (128 + 32) * 1024 * 1024: # account for an extra (big) PE on LVM |
1051 | ae26a287 | Iustin Pop | logger.Error("Meta device too big (%.2fMiB)" % (bytes / 1024 / 1024)) |
1052 | ae26a287 | Iustin Pop | return False |
1053 | ae26a287 | Iustin Pop | return True |
1054 | ae26a287 | Iustin Pop | |
1055 | f3e513ad | Iustin Pop | def Rename(self, new_id): |
1056 | f3e513ad | Iustin Pop | """Rename a device.
|
1057 | f3e513ad | Iustin Pop |
|
1058 | f3e513ad | Iustin Pop | This is not supported for drbd devices.
|
1059 | f3e513ad | Iustin Pop |
|
1060 | f3e513ad | Iustin Pop | """
|
1061 | f3e513ad | Iustin Pop | raise errors.ProgrammerError("Can't rename a drbd device") |
1062 | f3e513ad | Iustin Pop | |
1063 | 0f7f32d9 | Iustin Pop | |
1064 | 0f7f32d9 | Iustin Pop | class DRBDev(BaseDRBD): |
1065 | a8083063 | Iustin Pop | """DRBD block device.
|
1066 | a8083063 | Iustin Pop |
|
1067 | a8083063 | Iustin Pop | This implements the local host part of the DRBD device, i.e. it
|
1068 | a8083063 | Iustin Pop | doesn't do anything to the supposed peer. If you need a fully
|
1069 | a8083063 | Iustin Pop | connected DRBD pair, you need to use this class on both hosts.
|
1070 | a8083063 | Iustin Pop |
|
1071 | a8083063 | Iustin Pop | The unique_id for the drbd device is the (local_ip, local_port,
|
1072 | a8083063 | Iustin Pop | remote_ip, remote_port) tuple, and it must have two children: the
|
1073 | a8083063 | Iustin Pop | data device and the meta_device. The meta device is checked for
|
1074 | a8083063 | Iustin Pop | valid size and is zeroed on create.
|
1075 | a8083063 | Iustin Pop |
|
1076 | a8083063 | Iustin Pop | """
|
1077 | a8083063 | Iustin Pop | def __init__(self, unique_id, children): |
1078 | a8083063 | Iustin Pop | super(DRBDev, self).__init__(unique_id, children) |
1079 | a8083063 | Iustin Pop | self.major = self._DRBD_MAJOR |
1080 | 0f7f32d9 | Iustin Pop | [kmaj, kmin, kfix, api, proto] = self._GetVersion()
|
1081 | 0f7f32d9 | Iustin Pop | if kmaj != 0 and kmin != 7: |
1082 | 0f7f32d9 | Iustin Pop | raise errors.BlockDeviceError("Mismatch in DRBD kernel version and" |
1083 | 0f7f32d9 | Iustin Pop | " requested ganeti usage: kernel is"
|
1084 | 0f7f32d9 | Iustin Pop | " %s.%s, ganeti wants 0.7" % (kmaj, kmin))
|
1085 | 0f7f32d9 | Iustin Pop | |
1086 | a8083063 | Iustin Pop | if len(children) != 2: |
1087 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(children)) |
1088 | a8083063 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 4: |
1089 | a8083063 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1090 | a8083063 | Iustin Pop | self._lhost, self._lport, self._rhost, self._rport = unique_id |
1091 | a8083063 | Iustin Pop | self.Attach()
|
1092 | a8083063 | Iustin Pop | |
1093 | a8083063 | Iustin Pop | @classmethod
|
1094 | a8083063 | Iustin Pop | def _FindUnusedMinor(cls): |
1095 | a8083063 | Iustin Pop | """Find an unused DRBD device.
|
1096 | a8083063 | Iustin Pop |
|
1097 | a8083063 | Iustin Pop | """
|
1098 | a8083063 | Iustin Pop | data = cls._GetProcData() |
1099 | a8083063 | Iustin Pop | |
1100 | a8083063 | Iustin Pop | valid_line = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
1101 | a8083063 | Iustin Pop | for line in data: |
1102 | a8083063 | Iustin Pop | match = valid_line.match(line) |
1103 | a8083063 | Iustin Pop | if match:
|
1104 | a8083063 | Iustin Pop | return int(match.group(1)) |
1105 | a8083063 | Iustin Pop | logger.Error("Error: no free drbd minors!")
|
1106 | 0caf6485 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
1107 | a8083063 | Iustin Pop | |
1108 | a8083063 | Iustin Pop | @classmethod
|
1109 | a8083063 | Iustin Pop | def _GetDevInfo(cls, minor): |
1110 | a8083063 | Iustin Pop | """Get details about a given DRBD minor.
|
1111 | a8083063 | Iustin Pop |
|
1112 | a8083063 | Iustin Pop | This return, if available, the local backing device in (major,
|
1113 | a8083063 | Iustin Pop | minor) formant and the local and remote (ip, port) information.
|
1114 | a8083063 | Iustin Pop |
|
1115 | a8083063 | Iustin Pop | """
|
1116 | a8083063 | Iustin Pop | data = {} |
1117 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
1118 | a8083063 | Iustin Pop | if result.failed:
|
1119 | a8083063 | Iustin Pop | logger.Error("Can't display the drbd config: %s" % result.fail_reason)
|
1120 | a8083063 | Iustin Pop | return data
|
1121 | a8083063 | Iustin Pop | out = result.stdout |
1122 | a8083063 | Iustin Pop | if out == "Not configured\n": |
1123 | a8083063 | Iustin Pop | return data
|
1124 | a8083063 | Iustin Pop | for line in out.splitlines(): |
1125 | a8083063 | Iustin Pop | if "local_dev" not in data: |
1126 | a8083063 | Iustin Pop | match = re.match("^Lower device: ([0-9]+):([0-9]+) .*$", line)
|
1127 | a8083063 | Iustin Pop | if match:
|
1128 | a8083063 | Iustin Pop | data["local_dev"] = (int(match.group(1)), int(match.group(2))) |
1129 | a8083063 | Iustin Pop | continue
|
1130 | a8083063 | Iustin Pop | if "meta_dev" not in data: |
1131 | a8083063 | Iustin Pop | match = re.match("^Meta device: (([0-9]+):([0-9]+)|internal).*$", line)
|
1132 | a8083063 | Iustin Pop | if match:
|
1133 | a8083063 | Iustin Pop | if match.group(2) is not None and match.group(3) is not None: |
1134 | a8083063 | Iustin Pop | # matched on the major/minor
|
1135 | a8083063 | Iustin Pop | data["meta_dev"] = (int(match.group(2)), int(match.group(3))) |
1136 | a8083063 | Iustin Pop | else:
|
1137 | a8083063 | Iustin Pop | # matched on the "internal" string
|
1138 | a8083063 | Iustin Pop | data["meta_dev"] = match.group(1) |
1139 | a8083063 | Iustin Pop | # in this case, no meta_index is in the output
|
1140 | a8083063 | Iustin Pop | data["meta_index"] = -1 |
1141 | a8083063 | Iustin Pop | continue
|
1142 | a8083063 | Iustin Pop | if "meta_index" not in data: |
1143 | a8083063 | Iustin Pop | match = re.match("^Meta index: ([0-9]+).*$", line)
|
1144 | a8083063 | Iustin Pop | if match:
|
1145 | a8083063 | Iustin Pop | data["meta_index"] = int(match.group(1)) |
1146 | a8083063 | Iustin Pop | continue
|
1147 | a8083063 | Iustin Pop | if "local_addr" not in data: |
1148 | a8083063 | Iustin Pop | match = re.match("^Local address: ([0-9.]+):([0-9]+)$", line)
|
1149 | a8083063 | Iustin Pop | if match:
|
1150 | a8083063 | Iustin Pop | data["local_addr"] = (match.group(1), int(match.group(2))) |
1151 | a8083063 | Iustin Pop | continue
|
1152 | a8083063 | Iustin Pop | if "remote_addr" not in data: |
1153 | a8083063 | Iustin Pop | match = re.match("^Remote address: ([0-9.]+):([0-9]+)$", line)
|
1154 | a8083063 | Iustin Pop | if match:
|
1155 | a8083063 | Iustin Pop | data["remote_addr"] = (match.group(1), int(match.group(2))) |
1156 | a8083063 | Iustin Pop | continue
|
1157 | a8083063 | Iustin Pop | return data
|
1158 | a8083063 | Iustin Pop | |
1159 | a8083063 | Iustin Pop | def _MatchesLocal(self, info): |
1160 | a8083063 | Iustin Pop | """Test if our local config matches with an existing device.
|
1161 | a8083063 | Iustin Pop |
|
1162 | a8083063 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1163 | a8083063 | Iustin Pop | method tests if our local backing device is the same as the one in
|
1164 | a8083063 | Iustin Pop | the info parameter, in effect testing if we look like the given
|
1165 | a8083063 | Iustin Pop | device.
|
1166 | a8083063 | Iustin Pop |
|
1167 | a8083063 | Iustin Pop | """
|
1168 | a8083063 | Iustin Pop | if not ("local_dev" in info and "meta_dev" in info and |
1169 | a8083063 | Iustin Pop | "meta_index" in info): |
1170 | a8083063 | Iustin Pop | return False |
1171 | a8083063 | Iustin Pop | |
1172 | a8083063 | Iustin Pop | backend = self._children[0] |
1173 | a8083063 | Iustin Pop | if backend is not None: |
1174 | a8083063 | Iustin Pop | retval = (info["local_dev"] == (backend.major, backend.minor))
|
1175 | a8083063 | Iustin Pop | else:
|
1176 | a8083063 | Iustin Pop | retval = (info["local_dev"] == (0, 0)) |
1177 | a8083063 | Iustin Pop | meta = self._children[1] |
1178 | a8083063 | Iustin Pop | if meta is not None: |
1179 | a8083063 | Iustin Pop | retval = retval and (info["meta_dev"] == (meta.major, meta.minor)) |
1180 | a8083063 | Iustin Pop | retval = retval and (info["meta_index"] == 0) |
1181 | a8083063 | Iustin Pop | else:
|
1182 | a8083063 | Iustin Pop | retval = retval and (info["meta_dev"] == "internal" and |
1183 | a8083063 | Iustin Pop | info["meta_index"] == -1) |
1184 | a8083063 | Iustin Pop | return retval
|
1185 | a8083063 | Iustin Pop | |
1186 | a8083063 | Iustin Pop | def _MatchesNet(self, info): |
1187 | a8083063 | Iustin Pop | """Test if our network config matches with an existing device.
|
1188 | a8083063 | Iustin Pop |
|
1189 | a8083063 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1190 | a8083063 | Iustin Pop | method tests if our network configuration is the same as the one
|
1191 | a8083063 | Iustin Pop | in the info parameter, in effect testing if we look like the given
|
1192 | a8083063 | Iustin Pop | device.
|
1193 | a8083063 | Iustin Pop |
|
1194 | a8083063 | Iustin Pop | """
|
1195 | a8083063 | Iustin Pop | if (((self._lhost is None and not ("local_addr" in info)) and |
1196 | a8083063 | Iustin Pop | (self._rhost is None and not ("remote_addr" in info)))): |
1197 | a8083063 | Iustin Pop | return True |
1198 | a8083063 | Iustin Pop | |
1199 | a8083063 | Iustin Pop | if self._lhost is None: |
1200 | a8083063 | Iustin Pop | return False |
1201 | a8083063 | Iustin Pop | |
1202 | a8083063 | Iustin Pop | if not ("local_addr" in info and |
1203 | a8083063 | Iustin Pop | "remote_addr" in info): |
1204 | a8083063 | Iustin Pop | return False |
1205 | a8083063 | Iustin Pop | |
1206 | a8083063 | Iustin Pop | retval = (info["local_addr"] == (self._lhost, self._lport)) |
1207 | a8083063 | Iustin Pop | retval = (retval and
|
1208 | a8083063 | Iustin Pop | info["remote_addr"] == (self._rhost, self._rport)) |
1209 | a8083063 | Iustin Pop | return retval
|
1210 | a8083063 | Iustin Pop | |
1211 | a8083063 | Iustin Pop | @classmethod
|
1212 | a8083063 | Iustin Pop | def _AssembleLocal(cls, minor, backend, meta): |
1213 | a8083063 | Iustin Pop | """Configure the local part of a DRBD device.
|
1214 | a8083063 | Iustin Pop |
|
1215 | a8083063 | Iustin Pop | This is the first thing that must be done on an unconfigured DRBD
|
1216 | a8083063 | Iustin Pop | device. And it must be done only once.
|
1217 | a8083063 | Iustin Pop |
|
1218 | a8083063 | Iustin Pop | """
|
1219 | ae26a287 | Iustin Pop | if not cls._CheckMetaSize(meta): |
1220 | a8083063 | Iustin Pop | return False |
1221 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disk", |
1222 | a8083063 | Iustin Pop | backend, meta, "0", "-e", "detach"]) |
1223 | a8083063 | Iustin Pop | if result.failed:
|
1224 | a8083063 | Iustin Pop | logger.Error("Can't attach local disk: %s" % result.output)
|
1225 | a8083063 | Iustin Pop | return not result.failed |
1226 | a8083063 | Iustin Pop | |
1227 | a8083063 | Iustin Pop | @classmethod
|
1228 | a8083063 | Iustin Pop | def _ShutdownLocal(cls, minor): |
1229 | a8083063 | Iustin Pop | """Detach from the local device.
|
1230 | a8083063 | Iustin Pop |
|
1231 | a8083063 | Iustin Pop | I/Os will continue to be served from the remote device. If we
|
1232 | a8083063 | Iustin Pop | don't have a remote device, this operation will fail.
|
1233 | a8083063 | Iustin Pop |
|
1234 | a8083063 | Iustin Pop | """
|
1235 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
1236 | a8083063 | Iustin Pop | if result.failed:
|
1237 | a8083063 | Iustin Pop | logger.Error("Can't detach local device: %s" % result.output)
|
1238 | a8083063 | Iustin Pop | return not result.failed |
1239 | a8083063 | Iustin Pop | |
1240 | a8083063 | Iustin Pop | @staticmethod
|
1241 | a8083063 | Iustin Pop | def _ShutdownAll(minor): |
1242 | a8083063 | Iustin Pop | """Deactivate the device.
|
1243 | a8083063 | Iustin Pop |
|
1244 | a8083063 | Iustin Pop | This will, of course, fail if the device is in use.
|
1245 | a8083063 | Iustin Pop |
|
1246 | a8083063 | Iustin Pop | """
|
1247 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", DRBDev._DevPath(minor), "down"]) |
1248 | a8083063 | Iustin Pop | if result.failed:
|
1249 | a8083063 | Iustin Pop | logger.Error("Can't shutdown drbd device: %s" % result.output)
|
1250 | a8083063 | Iustin Pop | return not result.failed |
1251 | a8083063 | Iustin Pop | |
1252 | a8083063 | Iustin Pop | @classmethod
|
1253 | a8083063 | Iustin Pop | def _AssembleNet(cls, minor, net_info, protocol): |
1254 | a8083063 | Iustin Pop | """Configure the network part of the device.
|
1255 | a8083063 | Iustin Pop |
|
1256 | a8083063 | Iustin Pop | This operation can be, in theory, done multiple times, but there
|
1257 | a8083063 | Iustin Pop | have been cases (in lab testing) in which the network part of the
|
1258 | a8083063 | Iustin Pop | device had become stuck and couldn't be shut down because activity
|
1259 | a8083063 | Iustin Pop | from the new peer (also stuck) triggered a timer re-init and
|
1260 | a8083063 | Iustin Pop | needed remote peer interface shutdown in order to clear. So please
|
1261 | a8083063 | Iustin Pop | don't change online the net config.
|
1262 | a8083063 | Iustin Pop |
|
1263 | a8083063 | Iustin Pop | """
|
1264 | a8083063 | Iustin Pop | lhost, lport, rhost, rport = net_info |
1265 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "net", |
1266 | a8083063 | Iustin Pop | "%s:%s" % (lhost, lport), "%s:%s" % (rhost, rport), |
1267 | a8083063 | Iustin Pop | protocol]) |
1268 | a8083063 | Iustin Pop | if result.failed:
|
1269 | a8083063 | Iustin Pop | logger.Error("Can't setup network for dbrd device: %s" %
|
1270 | a8083063 | Iustin Pop | result.fail_reason) |
1271 | a8083063 | Iustin Pop | return False |
1272 | a8083063 | Iustin Pop | |
1273 | a8083063 | Iustin Pop | timeout = time.time() + 10
|
1274 | a8083063 | Iustin Pop | ok = False
|
1275 | a8083063 | Iustin Pop | while time.time() < timeout:
|
1276 | a8083063 | Iustin Pop | info = cls._GetDevInfo(minor) |
1277 | a8083063 | Iustin Pop | if not "local_addr" in info or not "remote_addr" in info: |
1278 | a8083063 | Iustin Pop | time.sleep(1)
|
1279 | a8083063 | Iustin Pop | continue
|
1280 | a8083063 | Iustin Pop | if (info["local_addr"] != (lhost, lport) or |
1281 | a8083063 | Iustin Pop | info["remote_addr"] != (rhost, rport)):
|
1282 | a8083063 | Iustin Pop | time.sleep(1)
|
1283 | a8083063 | Iustin Pop | continue
|
1284 | a8083063 | Iustin Pop | ok = True
|
1285 | a8083063 | Iustin Pop | break
|
1286 | a8083063 | Iustin Pop | if not ok: |
1287 | a8083063 | Iustin Pop | logger.Error("Timeout while configuring network")
|
1288 | a8083063 | Iustin Pop | return False |
1289 | a8083063 | Iustin Pop | return True |
1290 | a8083063 | Iustin Pop | |
1291 | a8083063 | Iustin Pop | @classmethod
|
1292 | a8083063 | Iustin Pop | def _ShutdownNet(cls, minor): |
1293 | a8083063 | Iustin Pop | """Disconnect from the remote peer.
|
1294 | a8083063 | Iustin Pop |
|
1295 | a8083063 | Iustin Pop | This fails if we don't have a local device.
|
1296 | a8083063 | Iustin Pop |
|
1297 | a8083063 | Iustin Pop | """
|
1298 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
1299 | a8083063 | Iustin Pop | logger.Error("Can't shutdown network: %s" % result.output)
|
1300 | a8083063 | Iustin Pop | return not result.failed |
1301 | a8083063 | Iustin Pop | |
1302 | a8083063 | Iustin Pop | def Assemble(self): |
1303 | a8083063 | Iustin Pop | """Assemble the drbd.
|
1304 | a8083063 | Iustin Pop |
|
1305 | a8083063 | Iustin Pop | Method:
|
1306 | a8083063 | Iustin Pop | - if we have a local backing device, we bind to it by:
|
1307 | a8083063 | Iustin Pop | - checking the list of used drbd devices
|
1308 | a8083063 | Iustin Pop | - check if the local minor use of any of them is our own device
|
1309 | a8083063 | Iustin Pop | - if yes, abort?
|
1310 | a8083063 | Iustin Pop | - if not, bind
|
1311 | a8083063 | Iustin Pop | - if we have a local/remote net info:
|
1312 | a8083063 | Iustin Pop | - redo the local backing device step for the remote device
|
1313 | a8083063 | Iustin Pop | - check if any drbd device is using the local port,
|
1314 | a8083063 | Iustin Pop | if yes abort
|
1315 | a8083063 | Iustin Pop | - check if any remote drbd device is using the remote
|
1316 | a8083063 | Iustin Pop | port, if yes abort (for now)
|
1317 | a8083063 | Iustin Pop | - bind our net port
|
1318 | a8083063 | Iustin Pop | - bind the remote net port
|
1319 | a8083063 | Iustin Pop |
|
1320 | a8083063 | Iustin Pop | """
|
1321 | a8083063 | Iustin Pop | self.Attach()
|
1322 | a8083063 | Iustin Pop | if self.minor is not None: |
1323 | a8083063 | Iustin Pop | logger.Info("Already assembled")
|
1324 | a8083063 | Iustin Pop | return True |
1325 | a8083063 | Iustin Pop | |
1326 | a8083063 | Iustin Pop | result = super(DRBDev, self).Assemble() |
1327 | a8083063 | Iustin Pop | if not result: |
1328 | a8083063 | Iustin Pop | return result
|
1329 | a8083063 | Iustin Pop | |
1330 | a8083063 | Iustin Pop | minor = self._FindUnusedMinor()
|
1331 | a8083063 | Iustin Pop | need_localdev_teardown = False
|
1332 | a8083063 | Iustin Pop | if self._children[0]: |
1333 | a8083063 | Iustin Pop | result = self._AssembleLocal(minor, self._children[0].dev_path, |
1334 | a8083063 | Iustin Pop | self._children[1].dev_path) |
1335 | a8083063 | Iustin Pop | if not result: |
1336 | a8083063 | Iustin Pop | return False |
1337 | a8083063 | Iustin Pop | need_localdev_teardown = True
|
1338 | a8083063 | Iustin Pop | if self._lhost and self._lport and self._rhost and self._rport: |
1339 | a8083063 | Iustin Pop | result = self._AssembleNet(minor,
|
1340 | a8083063 | Iustin Pop | (self._lhost, self._lport, |
1341 | a8083063 | Iustin Pop | self._rhost, self._rport), |
1342 | a8083063 | Iustin Pop | "C")
|
1343 | a8083063 | Iustin Pop | if not result: |
1344 | a8083063 | Iustin Pop | if need_localdev_teardown:
|
1345 | a8083063 | Iustin Pop | # we will ignore failures from this
|
1346 | a8083063 | Iustin Pop | logger.Error("net setup failed, tearing down local device")
|
1347 | a8083063 | Iustin Pop | self._ShutdownAll(minor)
|
1348 | a8083063 | Iustin Pop | return False |
1349 | a8083063 | Iustin Pop | self._SetFromMinor(minor)
|
1350 | a8083063 | Iustin Pop | return True |
1351 | a8083063 | Iustin Pop | |
1352 | a8083063 | Iustin Pop | def Shutdown(self): |
1353 | a8083063 | Iustin Pop | """Shutdown the DRBD device.
|
1354 | a8083063 | Iustin Pop |
|
1355 | a8083063 | Iustin Pop | """
|
1356 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
1357 | a8083063 | Iustin Pop | logger.Info("DRBD device not attached to a device during Shutdown")
|
1358 | a8083063 | Iustin Pop | return True |
1359 | a8083063 | Iustin Pop | if not self._ShutdownAll(self.minor): |
1360 | a8083063 | Iustin Pop | return False |
1361 | a8083063 | Iustin Pop | self.minor = None |
1362 | a8083063 | Iustin Pop | self.dev_path = None |
1363 | a8083063 | Iustin Pop | return True |
1364 | a8083063 | Iustin Pop | |
1365 | a8083063 | Iustin Pop | def Attach(self): |
1366 | a8083063 | Iustin Pop | """Find a DRBD device which matches our config and attach to it.
|
1367 | a8083063 | Iustin Pop |
|
1368 | a8083063 | Iustin Pop | In case of partially attached (local device matches but no network
|
1369 | a8083063 | Iustin Pop | setup), we perform the network attach. If successful, we re-test
|
1370 | a8083063 | Iustin Pop | the attach if can return success.
|
1371 | a8083063 | Iustin Pop |
|
1372 | a8083063 | Iustin Pop | """
|
1373 | a8083063 | Iustin Pop | for minor in self._GetUsedDevs(): |
1374 | a8083063 | Iustin Pop | info = self._GetDevInfo(minor)
|
1375 | a8083063 | Iustin Pop | match_l = self._MatchesLocal(info)
|
1376 | a8083063 | Iustin Pop | match_r = self._MatchesNet(info)
|
1377 | a8083063 | Iustin Pop | if match_l and match_r: |
1378 | a8083063 | Iustin Pop | break
|
1379 | a8083063 | Iustin Pop | if match_l and not match_r and "local_addr" not in info: |
1380 | a8083063 | Iustin Pop | res_r = self._AssembleNet(minor,
|
1381 | a8083063 | Iustin Pop | (self._lhost, self._lport, |
1382 | a8083063 | Iustin Pop | self._rhost, self._rport), |
1383 | a8083063 | Iustin Pop | "C")
|
1384 | a8083063 | Iustin Pop | if res_r and self._MatchesNet(self._GetDevInfo(minor)): |
1385 | a8083063 | Iustin Pop | break
|
1386 | a8083063 | Iustin Pop | else:
|
1387 | a8083063 | Iustin Pop | minor = None
|
1388 | a8083063 | Iustin Pop | |
1389 | a8083063 | Iustin Pop | self._SetFromMinor(minor)
|
1390 | a8083063 | Iustin Pop | return minor is not None |
1391 | a8083063 | Iustin Pop | |
1392 | a8083063 | Iustin Pop | def Open(self, force=False): |
1393 | a8083063 | Iustin Pop | """Make the local state primary.
|
1394 | a8083063 | Iustin Pop |
|
1395 | a8083063 | Iustin Pop | If the 'force' parameter is given, the '--do-what-I-say' parameter
|
1396 | a8083063 | Iustin Pop | is given. Since this is a pottentialy dangerous operation, the
|
1397 | a8083063 | Iustin Pop | force flag should be only given after creation, when it actually
|
1398 | a8083063 | Iustin Pop | has to be given.
|
1399 | a8083063 | Iustin Pop |
|
1400 | a8083063 | Iustin Pop | """
|
1401 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
1402 | a8083063 | Iustin Pop | logger.Error("DRBD cannot attach to a device during open")
|
1403 | a8083063 | Iustin Pop | return False |
1404 | a8083063 | Iustin Pop | cmd = ["drbdsetup", self.dev_path, "primary"] |
1405 | a8083063 | Iustin Pop | if force:
|
1406 | a8083063 | Iustin Pop | cmd.append("--do-what-I-say")
|
1407 | a8083063 | Iustin Pop | result = utils.RunCmd(cmd) |
1408 | a8083063 | Iustin Pop | if result.failed:
|
1409 | a8083063 | Iustin Pop | logger.Error("Can't make drbd device primary: %s" % result.output)
|
1410 | a8083063 | Iustin Pop | return False |
1411 | a8083063 | Iustin Pop | return True |
1412 | a8083063 | Iustin Pop | |
1413 | a8083063 | Iustin Pop | def Close(self): |
1414 | a8083063 | Iustin Pop | """Make the local state secondary.
|
1415 | a8083063 | Iustin Pop |
|
1416 | a8083063 | Iustin Pop | This will, of course, fail if the device is in use.
|
1417 | a8083063 | Iustin Pop |
|
1418 | a8083063 | Iustin Pop | """
|
1419 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
1420 | a8083063 | Iustin Pop | logger.Info("Instance not attached to a device")
|
1421 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't find device") |
1422 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
1423 | a8083063 | Iustin Pop | if result.failed:
|
1424 | a8083063 | Iustin Pop | logger.Error("Can't switch drbd device to secondary: %s" % result.output)
|
1425 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't switch drbd device to secondary") |
1426 | a8083063 | Iustin Pop | |
1427 | a8083063 | Iustin Pop | def SetSyncSpeed(self, kbytes): |
1428 | a8083063 | Iustin Pop | """Set the speed of the DRBD syncer.
|
1429 | a8083063 | Iustin Pop |
|
1430 | a8083063 | Iustin Pop | """
|
1431 | a8083063 | Iustin Pop | children_result = super(DRBDev, self).SetSyncSpeed(kbytes) |
1432 | a8083063 | Iustin Pop | if self.minor is None: |
1433 | a8083063 | Iustin Pop | logger.Info("Instance not attached to a device")
|
1434 | a8083063 | Iustin Pop | return False |
1435 | a8083063 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "syncer", "-r", "%d" % |
1436 | a8083063 | Iustin Pop | kbytes]) |
1437 | a8083063 | Iustin Pop | if result.failed:
|
1438 | a8083063 | Iustin Pop | logger.Error("Can't change syncer rate: %s " % result.fail_reason)
|
1439 | a8083063 | Iustin Pop | return not result.failed and children_result |
1440 | a8083063 | Iustin Pop | |
1441 | a8083063 | Iustin Pop | def GetSyncStatus(self): |
1442 | a8083063 | Iustin Pop | """Returns the sync status of the device.
|
1443 | a8083063 | Iustin Pop |
|
1444 | a8083063 | Iustin Pop | Returns:
|
1445 | a8083063 | Iustin Pop | (sync_percent, estimated_time)
|
1446 | a8083063 | Iustin Pop |
|
1447 | a8083063 | Iustin Pop | If sync_percent is None, it means all is ok
|
1448 | a8083063 | Iustin Pop | If estimated_time is None, it means we can't esimate
|
1449 | a8083063 | Iustin Pop | the time needed, otherwise it's the time left in seconds
|
1450 | a8083063 | Iustin Pop |
|
1451 | a8083063 | Iustin Pop | """
|
1452 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
1453 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device in GetSyncStatus") |
1454 | a8083063 | Iustin Pop | proc_info = self._MassageProcData(self._GetProcData()) |
1455 | a8083063 | Iustin Pop | if self.minor not in proc_info: |
1456 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't find myself in /proc (minor %d)" % |
1457 | a8083063 | Iustin Pop | self.minor)
|
1458 | a8083063 | Iustin Pop | line = proc_info[self.minor]
|
1459 | a8083063 | Iustin Pop | match = re.match("^.*sync'ed: *([0-9.]+)%.*"
|
1460 | a8083063 | Iustin Pop | " finish: ([0-9]+):([0-9]+):([0-9]+) .*$", line)
|
1461 | a8083063 | Iustin Pop | if match:
|
1462 | a8083063 | Iustin Pop | sync_percent = float(match.group(1)) |
1463 | a8083063 | Iustin Pop | hours = int(match.group(2)) |
1464 | a8083063 | Iustin Pop | minutes = int(match.group(3)) |
1465 | a8083063 | Iustin Pop | seconds = int(match.group(4)) |
1466 | a8083063 | Iustin Pop | est_time = hours * 3600 + minutes * 60 + seconds |
1467 | a8083063 | Iustin Pop | else:
|
1468 | a8083063 | Iustin Pop | sync_percent = None
|
1469 | a8083063 | Iustin Pop | est_time = None
|
1470 | a8083063 | Iustin Pop | match = re.match("^ *[0-9]+: cs:([^ ]+).*$", line)
|
1471 | a8083063 | Iustin Pop | if not match: |
1472 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't find my data in /proc (minor %d)" % |
1473 | a8083063 | Iustin Pop | self.minor)
|
1474 | a8083063 | Iustin Pop | client_state = match.group(1)
|
1475 | a8083063 | Iustin Pop | is_degraded = client_state != "Connected"
|
1476 | a8083063 | Iustin Pop | return sync_percent, est_time, is_degraded
|
1477 | a8083063 | Iustin Pop | |
1478 | a8083063 | Iustin Pop | def GetStatus(self): |
1479 | a8083063 | Iustin Pop | """Compute the status of the DRBD device
|
1480 | a8083063 | Iustin Pop |
|
1481 | a8083063 | Iustin Pop | Note that DRBD devices don't have the STATUS_EXISTING state.
|
1482 | a8083063 | Iustin Pop |
|
1483 | a8083063 | Iustin Pop | """
|
1484 | a8083063 | Iustin Pop | if self.minor is None and not self.Attach(): |
1485 | a8083063 | Iustin Pop | return self.STATUS_UNKNOWN |
1486 | a8083063 | Iustin Pop | |
1487 | a8083063 | Iustin Pop | data = self._GetProcData()
|
1488 | a8083063 | Iustin Pop | match = re.compile("^ *%d: cs:[^ ]+ st:(Primary|Secondary)/.*$" %
|
1489 | a8083063 | Iustin Pop | self.minor)
|
1490 | a8083063 | Iustin Pop | for line in data: |
1491 | a8083063 | Iustin Pop | mresult = match.match(line) |
1492 | a8083063 | Iustin Pop | if mresult:
|
1493 | a8083063 | Iustin Pop | break
|
1494 | a8083063 | Iustin Pop | else:
|
1495 | a8083063 | Iustin Pop | logger.Error("Can't find myself!")
|
1496 | a8083063 | Iustin Pop | return self.STATUS_UNKNOWN |
1497 | a8083063 | Iustin Pop | |
1498 | a8083063 | Iustin Pop | state = mresult.group(2)
|
1499 | a8083063 | Iustin Pop | if state == "Primary": |
1500 | a8083063 | Iustin Pop | result = self.STATUS_ONLINE
|
1501 | a8083063 | Iustin Pop | else:
|
1502 | a8083063 | Iustin Pop | result = self.STATUS_STANDBY
|
1503 | a8083063 | Iustin Pop | |
1504 | a8083063 | Iustin Pop | return result
|
1505 | a8083063 | Iustin Pop | |
1506 | a8083063 | Iustin Pop | @staticmethod
|
1507 | a8083063 | Iustin Pop | def _ZeroDevice(device): |
1508 | a8083063 | Iustin Pop | """Zero a device.
|
1509 | a8083063 | Iustin Pop |
|
1510 | a8083063 | Iustin Pop | This writes until we get ENOSPC.
|
1511 | a8083063 | Iustin Pop |
|
1512 | a8083063 | Iustin Pop | """
|
1513 | a8083063 | Iustin Pop | f = open(device, "w") |
1514 | a8083063 | Iustin Pop | buf = "\0" * 1048576 |
1515 | a8083063 | Iustin Pop | try:
|
1516 | a8083063 | Iustin Pop | while True: |
1517 | a8083063 | Iustin Pop | f.write(buf) |
1518 | a8083063 | Iustin Pop | except IOError, err: |
1519 | a8083063 | Iustin Pop | if err.errno != errno.ENOSPC:
|
1520 | a8083063 | Iustin Pop | raise
|
1521 | a8083063 | Iustin Pop | |
1522 | a8083063 | Iustin Pop | @classmethod
|
1523 | a8083063 | Iustin Pop | def Create(cls, unique_id, children, size): |
1524 | a8083063 | Iustin Pop | """Create a new DRBD device.
|
1525 | a8083063 | Iustin Pop |
|
1526 | a8083063 | Iustin Pop | Since DRBD devices are not created per se, just assembled, this
|
1527 | a8083063 | Iustin Pop | function just zeroes the meta device.
|
1528 | a8083063 | Iustin Pop |
|
1529 | a8083063 | Iustin Pop | """
|
1530 | a8083063 | Iustin Pop | if len(children) != 2: |
1531 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid setup for the drbd device") |
1532 | a8083063 | Iustin Pop | meta = children[1]
|
1533 | a8083063 | Iustin Pop | meta.Assemble() |
1534 | a8083063 | Iustin Pop | if not meta.Attach(): |
1535 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to meta device") |
1536 | ae26a287 | Iustin Pop | if not cls._CheckMetaSize(meta.dev_path): |
1537 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device") |
1538 | a8083063 | Iustin Pop | logger.Info("Started zeroing device %s" % meta.dev_path)
|
1539 | a8083063 | Iustin Pop | cls._ZeroDevice(meta.dev_path) |
1540 | a8083063 | Iustin Pop | logger.Info("Done zeroing device %s" % meta.dev_path)
|
1541 | a8083063 | Iustin Pop | return cls(unique_id, children)
|
1542 | a8083063 | Iustin Pop | |
1543 | a8083063 | Iustin Pop | def Remove(self): |
1544 | a8083063 | Iustin Pop | """Stub remove for DRBD devices.
|
1545 | a8083063 | Iustin Pop |
|
1546 | a8083063 | Iustin Pop | """
|
1547 | a8083063 | Iustin Pop | return self.Shutdown() |
1548 | a8083063 | Iustin Pop | |
1549 | f3e513ad | Iustin Pop | |
1550 | a2cfdea2 | Iustin Pop | class DRBD8(BaseDRBD): |
1551 | a2cfdea2 | Iustin Pop | """DRBD v8.x block device.
|
1552 | a2cfdea2 | Iustin Pop |
|
1553 | a2cfdea2 | Iustin Pop | This implements the local host part of the DRBD device, i.e. it
|
1554 | a2cfdea2 | Iustin Pop | doesn't do anything to the supposed peer. If you need a fully
|
1555 | a2cfdea2 | Iustin Pop | connected DRBD pair, you need to use this class on both hosts.
|
1556 | a2cfdea2 | Iustin Pop |
|
1557 | a2cfdea2 | Iustin Pop | The unique_id for the drbd device is the (local_ip, local_port,
|
1558 | a2cfdea2 | Iustin Pop | remote_ip, remote_port) tuple, and it must have two children: the
|
1559 | a2cfdea2 | Iustin Pop | data device and the meta_device. The meta device is checked for
|
1560 | a2cfdea2 | Iustin Pop | valid size and is zeroed on create.
|
1561 | a2cfdea2 | Iustin Pop |
|
1562 | a2cfdea2 | Iustin Pop | """
|
1563 | a2cfdea2 | Iustin Pop | _MAX_MINORS = 255
|
1564 | a2cfdea2 | Iustin Pop | _PARSE_SHOW = None
|
1565 | a2cfdea2 | Iustin Pop | |
1566 | a2cfdea2 | Iustin Pop | def __init__(self, unique_id, children): |
1567 | a2cfdea2 | Iustin Pop | super(DRBD8, self).__init__(unique_id, children) |
1568 | a2cfdea2 | Iustin Pop | self.major = self._DRBD_MAJOR |
1569 | a2cfdea2 | Iustin Pop | [kmaj, kmin, kfix, api, proto] = self._GetVersion()
|
1570 | a2cfdea2 | Iustin Pop | if kmaj != 8: |
1571 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Mismatch in DRBD kernel version and" |
1572 | a2cfdea2 | Iustin Pop | " requested ganeti usage: kernel is"
|
1573 | a2cfdea2 | Iustin Pop | " %s.%s, ganeti wants 8.x" % (kmaj, kmin))
|
1574 | a2cfdea2 | Iustin Pop | |
1575 | b00b95dd | Iustin Pop | if len(children) not in (0, 2): |
1576 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(children)) |
1577 | a2cfdea2 | Iustin Pop | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 4: |
1578 | a2cfdea2 | Iustin Pop | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
1579 | a2cfdea2 | Iustin Pop | self._lhost, self._lport, self._rhost, self._rport = unique_id |
1580 | a2cfdea2 | Iustin Pop | self.Attach()
|
1581 | a2cfdea2 | Iustin Pop | |
1582 | a2cfdea2 | Iustin Pop | @classmethod
|
1583 | a2cfdea2 | Iustin Pop | def _InitMeta(cls, minor, dev_path): |
1584 | a2cfdea2 | Iustin Pop | """Initialize a meta device.
|
1585 | a2cfdea2 | Iustin Pop |
|
1586 | a2cfdea2 | Iustin Pop | This will not work if the given minor is in use.
|
1587 | a2cfdea2 | Iustin Pop |
|
1588 | a2cfdea2 | Iustin Pop | """
|
1589 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", "--force", cls._DevPath(minor), |
1590 | a2cfdea2 | Iustin Pop | "v08", dev_path, "0", "create-md"]) |
1591 | a2cfdea2 | Iustin Pop | if result.failed:
|
1592 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't initialize meta device: %s" % |
1593 | a2cfdea2 | Iustin Pop | result.output) |
1594 | a2cfdea2 | Iustin Pop | |
1595 | a2cfdea2 | Iustin Pop | @classmethod
|
1596 | a2cfdea2 | Iustin Pop | def _FindUnusedMinor(cls): |
1597 | a2cfdea2 | Iustin Pop | """Find an unused DRBD device.
|
1598 | a2cfdea2 | Iustin Pop |
|
1599 | a2cfdea2 | Iustin Pop | This is specific to 8.x as the minors are allocated dynamically,
|
1600 | a2cfdea2 | Iustin Pop | so non-existing numbers up to a max minor count are actually free.
|
1601 | a2cfdea2 | Iustin Pop |
|
1602 | a2cfdea2 | Iustin Pop | """
|
1603 | a2cfdea2 | Iustin Pop | data = cls._GetProcData() |
1604 | a2cfdea2 | Iustin Pop | |
1605 | a2cfdea2 | Iustin Pop | unused_line = re.compile("^ *([0-9]+): cs:Unconfigured$")
|
1606 | a2cfdea2 | Iustin Pop | used_line = re.compile("^ *([0-9]+): cs:")
|
1607 | a2cfdea2 | Iustin Pop | highest = None
|
1608 | a2cfdea2 | Iustin Pop | for line in data: |
1609 | a2cfdea2 | Iustin Pop | match = unused_line.match(line) |
1610 | a2cfdea2 | Iustin Pop | if match:
|
1611 | a2cfdea2 | Iustin Pop | return int(match.group(1)) |
1612 | a2cfdea2 | Iustin Pop | match = used_line.match(line) |
1613 | a2cfdea2 | Iustin Pop | if match:
|
1614 | a2cfdea2 | Iustin Pop | minor = int(match.group(1)) |
1615 | a2cfdea2 | Iustin Pop | highest = max(highest, minor)
|
1616 | a2cfdea2 | Iustin Pop | if highest is None: # there are no minors in use at all |
1617 | a2cfdea2 | Iustin Pop | return 0 |
1618 | a2cfdea2 | Iustin Pop | if highest >= cls._MAX_MINORS:
|
1619 | a2cfdea2 | Iustin Pop | logger.Error("Error: no free drbd minors!")
|
1620 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find a free DRBD minor") |
1621 | a2cfdea2 | Iustin Pop | return highest + 1 |
1622 | a2cfdea2 | Iustin Pop | |
1623 | a2cfdea2 | Iustin Pop | @classmethod
|
1624 | a2cfdea2 | Iustin Pop | def _IsValidMeta(cls, meta_device): |
1625 | a2cfdea2 | Iustin Pop | """Check if the given meta device looks like a valid one.
|
1626 | a2cfdea2 | Iustin Pop |
|
1627 | a2cfdea2 | Iustin Pop | """
|
1628 | a2cfdea2 | Iustin Pop | minor = cls._FindUnusedMinor() |
1629 | a2cfdea2 | Iustin Pop | minor_path = cls._DevPath(minor) |
1630 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdmeta", minor_path,
|
1631 | a2cfdea2 | Iustin Pop | "v08", meta_device, "0", |
1632 | a2cfdea2 | Iustin Pop | "dstate"])
|
1633 | a2cfdea2 | Iustin Pop | if result.failed:
|
1634 | a2cfdea2 | Iustin Pop | logger.Error("Invalid meta device %s: %s" % (meta_device, result.output))
|
1635 | a2cfdea2 | Iustin Pop | return False |
1636 | a2cfdea2 | Iustin Pop | return True |
1637 | a2cfdea2 | Iustin Pop | |
1638 | a2cfdea2 | Iustin Pop | @classmethod
|
1639 | a2cfdea2 | Iustin Pop | def _GetShowParser(cls): |
1640 | a2cfdea2 | Iustin Pop | """Return a parser for `drbd show` output.
|
1641 | a2cfdea2 | Iustin Pop |
|
1642 | a2cfdea2 | Iustin Pop | This will either create or return an already-create parser for the
|
1643 | a2cfdea2 | Iustin Pop | output of the command `drbd show`.
|
1644 | a2cfdea2 | Iustin Pop |
|
1645 | a2cfdea2 | Iustin Pop | """
|
1646 | a2cfdea2 | Iustin Pop | if cls._PARSE_SHOW is not None: |
1647 | a2cfdea2 | Iustin Pop | return cls._PARSE_SHOW
|
1648 | a2cfdea2 | Iustin Pop | |
1649 | a2cfdea2 | Iustin Pop | # pyparsing setup
|
1650 | a2cfdea2 | Iustin Pop | lbrace = pyp.Literal("{").suppress()
|
1651 | a2cfdea2 | Iustin Pop | rbrace = pyp.Literal("}").suppress()
|
1652 | a2cfdea2 | Iustin Pop | semi = pyp.Literal(";").suppress()
|
1653 | a2cfdea2 | Iustin Pop | # this also converts the value to an int
|
1654 | a2cfdea2 | Iustin Pop | number = pyp.Word(pyp.nums).setParseAction(lambda s, l, t:(l, [int(t[0])])) |
1655 | a2cfdea2 | Iustin Pop | |
1656 | a2cfdea2 | Iustin Pop | comment = pyp.Literal ("#") + pyp.Optional(pyp.restOfLine)
|
1657 | a2cfdea2 | Iustin Pop | defa = pyp.Literal("_is_default").suppress()
|
1658 | a2cfdea2 | Iustin Pop | dbl_quote = pyp.Literal('"').suppress()
|
1659 | a2cfdea2 | Iustin Pop | |
1660 | a2cfdea2 | Iustin Pop | keyword = pyp.Word(pyp.alphanums + '-')
|
1661 | a2cfdea2 | Iustin Pop | |
1662 | a2cfdea2 | Iustin Pop | # value types
|
1663 | a2cfdea2 | Iustin Pop | value = pyp.Word(pyp.alphanums + '_-/.:')
|
1664 | a2cfdea2 | Iustin Pop | quoted = dbl_quote + pyp.CharsNotIn('"') + dbl_quote
|
1665 | a2cfdea2 | Iustin Pop | addr_port = (pyp.Word(pyp.nums + '.') + pyp.Literal(':').suppress() + |
1666 | a2cfdea2 | Iustin Pop | number) |
1667 | a2cfdea2 | Iustin Pop | # meta device, extended syntax
|
1668 | a2cfdea2 | Iustin Pop | meta_value = ((value ^ quoted) + pyp.Literal('[').suppress() +
|
1669 | a2cfdea2 | Iustin Pop | number + pyp.Word(']').suppress())
|
1670 | a2cfdea2 | Iustin Pop | |
1671 | a2cfdea2 | Iustin Pop | # a statement
|
1672 | a2cfdea2 | Iustin Pop | stmt = (~rbrace + keyword + ~lbrace + |
1673 | a2cfdea2 | Iustin Pop | (addr_port ^ value ^ quoted ^ meta_value) + |
1674 | a2cfdea2 | Iustin Pop | pyp.Optional(defa) + semi + |
1675 | a2cfdea2 | Iustin Pop | pyp.Optional(pyp.restOfLine).suppress()) |
1676 | a2cfdea2 | Iustin Pop | |
1677 | a2cfdea2 | Iustin Pop | # an entire section
|
1678 | a2cfdea2 | Iustin Pop | section_name = pyp.Word(pyp.alphas + '_')
|
1679 | a2cfdea2 | Iustin Pop | section = section_name + lbrace + pyp.ZeroOrMore(pyp.Group(stmt)) + rbrace |
1680 | a2cfdea2 | Iustin Pop | |
1681 | a2cfdea2 | Iustin Pop | bnf = pyp.ZeroOrMore(pyp.Group(section ^ stmt)) |
1682 | a2cfdea2 | Iustin Pop | bnf.ignore(comment) |
1683 | a2cfdea2 | Iustin Pop | |
1684 | a2cfdea2 | Iustin Pop | cls._PARSE_SHOW = bnf |
1685 | a2cfdea2 | Iustin Pop | |
1686 | a2cfdea2 | Iustin Pop | return bnf
|
1687 | a2cfdea2 | Iustin Pop | |
1688 | a2cfdea2 | Iustin Pop | @classmethod
|
1689 | a2cfdea2 | Iustin Pop | def _GetDevInfo(cls, minor): |
1690 | a2cfdea2 | Iustin Pop | """Get details about a given DRBD minor.
|
1691 | a2cfdea2 | Iustin Pop |
|
1692 | a2cfdea2 | Iustin Pop | This return, if available, the local backing device (as a path)
|
1693 | a2cfdea2 | Iustin Pop | and the local and remote (ip, port) information.
|
1694 | a2cfdea2 | Iustin Pop |
|
1695 | a2cfdea2 | Iustin Pop | """
|
1696 | a2cfdea2 | Iustin Pop | data = {} |
1697 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "show"]) |
1698 | a2cfdea2 | Iustin Pop | if result.failed:
|
1699 | a2cfdea2 | Iustin Pop | logger.Error("Can't display the drbd config: %s" % result.fail_reason)
|
1700 | a2cfdea2 | Iustin Pop | return data
|
1701 | a2cfdea2 | Iustin Pop | out = result.stdout |
1702 | a2cfdea2 | Iustin Pop | if not out: |
1703 | a2cfdea2 | Iustin Pop | return data
|
1704 | a2cfdea2 | Iustin Pop | |
1705 | a2cfdea2 | Iustin Pop | bnf = cls._GetShowParser() |
1706 | a2cfdea2 | Iustin Pop | # run pyparse
|
1707 | a2cfdea2 | Iustin Pop | |
1708 | a2cfdea2 | Iustin Pop | try:
|
1709 | a2cfdea2 | Iustin Pop | results = bnf.parseString(out) |
1710 | a2cfdea2 | Iustin Pop | except pyp.ParseException, err:
|
1711 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't parse drbdsetup show output: %s" % |
1712 | a2cfdea2 | Iustin Pop | str(err))
|
1713 | a2cfdea2 | Iustin Pop | |
1714 | a2cfdea2 | Iustin Pop | # and massage the results into our desired format
|
1715 | a2cfdea2 | Iustin Pop | for section in results: |
1716 | a2cfdea2 | Iustin Pop | sname = section[0]
|
1717 | a2cfdea2 | Iustin Pop | if sname == "_this_host": |
1718 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
1719 | a2cfdea2 | Iustin Pop | if lst[0] == "disk": |
1720 | a2cfdea2 | Iustin Pop | data["local_dev"] = lst[1] |
1721 | a2cfdea2 | Iustin Pop | elif lst[0] == "meta-disk": |
1722 | a2cfdea2 | Iustin Pop | data["meta_dev"] = lst[1] |
1723 | a2cfdea2 | Iustin Pop | data["meta_index"] = lst[2] |
1724 | a2cfdea2 | Iustin Pop | elif lst[0] == "address": |
1725 | a2cfdea2 | Iustin Pop | data["local_addr"] = tuple(lst[1:]) |
1726 | a2cfdea2 | Iustin Pop | elif sname == "_remote_host": |
1727 | a2cfdea2 | Iustin Pop | for lst in section[1:]: |
1728 | a2cfdea2 | Iustin Pop | if lst[0] == "address": |
1729 | a2cfdea2 | Iustin Pop | data["remote_addr"] = tuple(lst[1:]) |
1730 | a2cfdea2 | Iustin Pop | return data
|
1731 | a2cfdea2 | Iustin Pop | |
1732 | a2cfdea2 | Iustin Pop | def _MatchesLocal(self, info): |
1733 | a2cfdea2 | Iustin Pop | """Test if our local config matches with an existing device.
|
1734 | a2cfdea2 | Iustin Pop |
|
1735 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1736 | a2cfdea2 | Iustin Pop | method tests if our local backing device is the same as the one in
|
1737 | a2cfdea2 | Iustin Pop | the info parameter, in effect testing if we look like the given
|
1738 | a2cfdea2 | Iustin Pop | device.
|
1739 | a2cfdea2 | Iustin Pop |
|
1740 | a2cfdea2 | Iustin Pop | """
|
1741 | b00b95dd | Iustin Pop | if self._children: |
1742 | b00b95dd | Iustin Pop | backend, meta = self._children
|
1743 | b00b95dd | Iustin Pop | else:
|
1744 | b00b95dd | Iustin Pop | backend = meta = None
|
1745 | b00b95dd | Iustin Pop | |
1746 | a2cfdea2 | Iustin Pop | if backend is not None: |
1747 | b00b95dd | Iustin Pop | retval = ("local_dev" in info and info["local_dev"] == backend.dev_path) |
1748 | a2cfdea2 | Iustin Pop | else:
|
1749 | a2cfdea2 | Iustin Pop | retval = ("local_dev" not in info) |
1750 | b00b95dd | Iustin Pop | |
1751 | a2cfdea2 | Iustin Pop | if meta is not None: |
1752 | b00b95dd | Iustin Pop | retval = retval and ("meta_dev" in info and |
1753 | b00b95dd | Iustin Pop | info["meta_dev"] == meta.dev_path)
|
1754 | b00b95dd | Iustin Pop | retval = retval and ("meta_index" in info and |
1755 | b00b95dd | Iustin Pop | info["meta_index"] == 0) |
1756 | a2cfdea2 | Iustin Pop | else:
|
1757 | a2cfdea2 | Iustin Pop | retval = retval and ("meta_dev" not in info and |
1758 | a2cfdea2 | Iustin Pop | "meta_index" not in info) |
1759 | a2cfdea2 | Iustin Pop | return retval
|
1760 | a2cfdea2 | Iustin Pop | |
1761 | a2cfdea2 | Iustin Pop | def _MatchesNet(self, info): |
1762 | a2cfdea2 | Iustin Pop | """Test if our network config matches with an existing device.
|
1763 | a2cfdea2 | Iustin Pop |
|
1764 | a2cfdea2 | Iustin Pop | The parameter should be as returned from `_GetDevInfo()`. This
|
1765 | a2cfdea2 | Iustin Pop | method tests if our network configuration is the same as the one
|
1766 | a2cfdea2 | Iustin Pop | in the info parameter, in effect testing if we look like the given
|
1767 | a2cfdea2 | Iustin Pop | device.
|
1768 | a2cfdea2 | Iustin Pop |
|
1769 | a2cfdea2 | Iustin Pop | """
|
1770 | a2cfdea2 | Iustin Pop | if (((self._lhost is None and not ("local_addr" in info)) and |
1771 | a2cfdea2 | Iustin Pop | (self._rhost is None and not ("remote_addr" in info)))): |
1772 | a2cfdea2 | Iustin Pop | return True |
1773 | a2cfdea2 | Iustin Pop | |
1774 | a2cfdea2 | Iustin Pop | if self._lhost is None: |
1775 | a2cfdea2 | Iustin Pop | return False |
1776 | a2cfdea2 | Iustin Pop | |
1777 | a2cfdea2 | Iustin Pop | if not ("local_addr" in info and |
1778 | a2cfdea2 | Iustin Pop | "remote_addr" in info): |
1779 | a2cfdea2 | Iustin Pop | return False |
1780 | a2cfdea2 | Iustin Pop | |
1781 | a2cfdea2 | Iustin Pop | retval = (info["local_addr"] == (self._lhost, self._lport)) |
1782 | a2cfdea2 | Iustin Pop | retval = (retval and
|
1783 | a2cfdea2 | Iustin Pop | info["remote_addr"] == (self._rhost, self._rport)) |
1784 | a2cfdea2 | Iustin Pop | return retval
|
1785 | a2cfdea2 | Iustin Pop | |
1786 | a2cfdea2 | Iustin Pop | @classmethod
|
1787 | a2cfdea2 | Iustin Pop | def _AssembleLocal(cls, minor, backend, meta): |
1788 | a2cfdea2 | Iustin Pop | """Configure the local part of a DRBD device.
|
1789 | a2cfdea2 | Iustin Pop |
|
1790 | a2cfdea2 | Iustin Pop | This is the first thing that must be done on an unconfigured DRBD
|
1791 | a2cfdea2 | Iustin Pop | device. And it must be done only once.
|
1792 | a2cfdea2 | Iustin Pop |
|
1793 | a2cfdea2 | Iustin Pop | """
|
1794 | a2cfdea2 | Iustin Pop | if not cls._IsValidMeta(meta): |
1795 | a2cfdea2 | Iustin Pop | return False |
1796 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disk", |
1797 | a2cfdea2 | Iustin Pop | backend, meta, "0", "-e", "detach", |
1798 | a2cfdea2 | Iustin Pop | "--create-device"])
|
1799 | a2cfdea2 | Iustin Pop | if result.failed:
|
1800 | a2cfdea2 | Iustin Pop | logger.Error("Can't attach local disk: %s" % result.output)
|
1801 | a2cfdea2 | Iustin Pop | return not result.failed |
1802 | a2cfdea2 | Iustin Pop | |
1803 | a2cfdea2 | Iustin Pop | @classmethod
|
1804 | a2cfdea2 | Iustin Pop | def _AssembleNet(cls, minor, net_info, protocol, |
1805 | a2cfdea2 | Iustin Pop | dual_pri=False, hmac=None, secret=None): |
1806 | a2cfdea2 | Iustin Pop | """Configure the network part of the device.
|
1807 | a2cfdea2 | Iustin Pop |
|
1808 | a2cfdea2 | Iustin Pop | """
|
1809 | a2cfdea2 | Iustin Pop | lhost, lport, rhost, rport = net_info |
1810 | a2cfdea2 | Iustin Pop | args = ["drbdsetup", cls._DevPath(minor), "net", |
1811 | f38478b2 | Iustin Pop | "%s:%s" % (lhost, lport), "%s:%s" % (rhost, rport), protocol, |
1812 | f38478b2 | Iustin Pop | "-A", "discard-zero-changes", |
1813 | f38478b2 | Iustin Pop | "-B", "consensus", |
1814 | f38478b2 | Iustin Pop | ] |
1815 | a2cfdea2 | Iustin Pop | if dual_pri:
|
1816 | a2cfdea2 | Iustin Pop | args.append("-m")
|
1817 | a2cfdea2 | Iustin Pop | if hmac and secret: |
1818 | a2cfdea2 | Iustin Pop | args.extend(["-a", hmac, "-x", secret]) |
1819 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(args) |
1820 | a2cfdea2 | Iustin Pop | if result.failed:
|
1821 | a2cfdea2 | Iustin Pop | logger.Error("Can't setup network for dbrd device: %s" %
|
1822 | a2cfdea2 | Iustin Pop | result.fail_reason) |
1823 | a2cfdea2 | Iustin Pop | return False |
1824 | a2cfdea2 | Iustin Pop | |
1825 | a2cfdea2 | Iustin Pop | timeout = time.time() + 10
|
1826 | a2cfdea2 | Iustin Pop | ok = False
|
1827 | a2cfdea2 | Iustin Pop | while time.time() < timeout:
|
1828 | a2cfdea2 | Iustin Pop | info = cls._GetDevInfo(minor) |
1829 | a2cfdea2 | Iustin Pop | if not "local_addr" in info or not "remote_addr" in info: |
1830 | a2cfdea2 | Iustin Pop | time.sleep(1)
|
1831 | a2cfdea2 | Iustin Pop | continue
|
1832 | a2cfdea2 | Iustin Pop | if (info["local_addr"] != (lhost, lport) or |
1833 | a2cfdea2 | Iustin Pop | info["remote_addr"] != (rhost, rport)):
|
1834 | a2cfdea2 | Iustin Pop | time.sleep(1)
|
1835 | a2cfdea2 | Iustin Pop | continue
|
1836 | a2cfdea2 | Iustin Pop | ok = True
|
1837 | a2cfdea2 | Iustin Pop | break
|
1838 | a2cfdea2 | Iustin Pop | if not ok: |
1839 | a2cfdea2 | Iustin Pop | logger.Error("Timeout while configuring network")
|
1840 | a2cfdea2 | Iustin Pop | return False |
1841 | a2cfdea2 | Iustin Pop | return True |
1842 | a2cfdea2 | Iustin Pop | |
1843 | b00b95dd | Iustin Pop | def AddChildren(self, devices): |
1844 | b00b95dd | Iustin Pop | """Add a disk to the DRBD device.
|
1845 | b00b95dd | Iustin Pop |
|
1846 | b00b95dd | Iustin Pop | """
|
1847 | b00b95dd | Iustin Pop | if self.minor is None: |
1848 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to dbrd8 during AddChildren") |
1849 | b00b95dd | Iustin Pop | |
1850 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1851 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Need two devices for AddChildren") |
1852 | b00b95dd | Iustin Pop | if self._children: |
1853 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("DRBD8 already attached to a local disk") |
1854 | b00b95dd | Iustin Pop | backend, meta = devices |
1855 | b00b95dd | Iustin Pop | if backend.dev_path is None or meta.dev_path is None: |
1856 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Children not ready during AddChildren") |
1857 | b00b95dd | Iustin Pop | backend.Open() |
1858 | b00b95dd | Iustin Pop | meta.Open() |
1859 | b00b95dd | Iustin Pop | if not self._CheckMetaSize(meta.dev_path): |
1860 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device size") |
1861 | b00b95dd | Iustin Pop | self._InitMeta(self._FindUnusedMinor(), meta.dev_path) |
1862 | b00b95dd | Iustin Pop | if not self._IsValidMeta(meta.dev_path): |
1863 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Cannot initalize meta device") |
1864 | b00b95dd | Iustin Pop | |
1865 | b00b95dd | Iustin Pop | if not self._AssembleLocal(self.minor, backend.dev_path, meta.dev_path): |
1866 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to local storage") |
1867 | b00b95dd | Iustin Pop | self._children = devices
|
1868 | b00b95dd | Iustin Pop | |
1869 | b00b95dd | Iustin Pop | def RemoveChildren(self, devices): |
1870 | b00b95dd | Iustin Pop | """Detach the drbd device from local storage.
|
1871 | b00b95dd | Iustin Pop |
|
1872 | b00b95dd | Iustin Pop | """
|
1873 | b00b95dd | Iustin Pop | if self.minor is None: |
1874 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't attach to drbd8 during" |
1875 | b00b95dd | Iustin Pop | " RemoveChildren")
|
1876 | b00b95dd | Iustin Pop | if len(self._children) != 2: |
1877 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("We don't have two children: %s" % |
1878 | b00b95dd | Iustin Pop | self._children)
|
1879 | b00b95dd | Iustin Pop | |
1880 | b00b95dd | Iustin Pop | if len(devices) != 2: |
1881 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("We need two children in RemoveChildren") |
1882 | b00b95dd | Iustin Pop | for idx, dev in enumerate(devices): |
1883 | b00b95dd | Iustin Pop | if dev.dev_path != self._children[idx].dev_path: |
1884 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Mismatch in local storage (%d) in" |
1885 | b00b95dd | Iustin Pop | " RemoveChildren" % idx)
|
1886 | b00b95dd | Iustin Pop | |
1887 | b00b95dd | Iustin Pop | if not self._ShutdownLocal(self.minor): |
1888 | b00b95dd | Iustin Pop | raise errors.BlockDeviceError("Can't detach from local storage") |
1889 | b00b95dd | Iustin Pop | self._children = []
|
1890 | b00b95dd | Iustin Pop | |
1891 | a2cfdea2 | Iustin Pop | def SetSyncSpeed(self, kbytes): |
1892 | a2cfdea2 | Iustin Pop | """Set the speed of the DRBD syncer.
|
1893 | a2cfdea2 | Iustin Pop |
|
1894 | a2cfdea2 | Iustin Pop | """
|
1895 | a2cfdea2 | Iustin Pop | children_result = super(DRBD8, self).SetSyncSpeed(kbytes) |
1896 | a2cfdea2 | Iustin Pop | if self.minor is None: |
1897 | a2cfdea2 | Iustin Pop | logger.Info("Instance not attached to a device")
|
1898 | a2cfdea2 | Iustin Pop | return False |
1899 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "syncer", "-r", "%d" % |
1900 | a2cfdea2 | Iustin Pop | kbytes]) |
1901 | a2cfdea2 | Iustin Pop | if result.failed:
|
1902 | a2cfdea2 | Iustin Pop | logger.Error("Can't change syncer rate: %s " % result.fail_reason)
|
1903 | a2cfdea2 | Iustin Pop | return not result.failed and children_result |
1904 | a2cfdea2 | Iustin Pop | |
1905 | a2cfdea2 | Iustin Pop | def GetSyncStatus(self): |
1906 | a2cfdea2 | Iustin Pop | """Returns the sync status of the device.
|
1907 | a2cfdea2 | Iustin Pop |
|
1908 | a2cfdea2 | Iustin Pop | Returns:
|
1909 | a2cfdea2 | Iustin Pop | (sync_percent, estimated_time)
|
1910 | a2cfdea2 | Iustin Pop |
|
1911 | a2cfdea2 | Iustin Pop | If sync_percent is None, it means all is ok
|
1912 | a2cfdea2 | Iustin Pop | If estimated_time is None, it means we can't esimate
|
1913 | a2cfdea2 | Iustin Pop | the time needed, otherwise it's the time left in seconds
|
1914 | a2cfdea2 | Iustin Pop |
|
1915 | a2cfdea2 | Iustin Pop | """
|
1916 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1917 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to device in GetSyncStatus") |
1918 | a2cfdea2 | Iustin Pop | proc_info = self._MassageProcData(self._GetProcData()) |
1919 | a2cfdea2 | Iustin Pop | if self.minor not in proc_info: |
1920 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find myself in /proc (minor %d)" % |
1921 | a2cfdea2 | Iustin Pop | self.minor)
|
1922 | a2cfdea2 | Iustin Pop | line = proc_info[self.minor]
|
1923 | a2cfdea2 | Iustin Pop | match = re.match("^.*sync'ed: *([0-9.]+)%.*"
|
1924 | a2cfdea2 | Iustin Pop | " finish: ([0-9]+):([0-9]+):([0-9]+) .*$", line)
|
1925 | a2cfdea2 | Iustin Pop | if match:
|
1926 | a2cfdea2 | Iustin Pop | sync_percent = float(match.group(1)) |
1927 | a2cfdea2 | Iustin Pop | hours = int(match.group(2)) |
1928 | a2cfdea2 | Iustin Pop | minutes = int(match.group(3)) |
1929 | a2cfdea2 | Iustin Pop | seconds = int(match.group(4)) |
1930 | a2cfdea2 | Iustin Pop | est_time = hours * 3600 + minutes * 60 + seconds |
1931 | a2cfdea2 | Iustin Pop | else:
|
1932 | a2cfdea2 | Iustin Pop | sync_percent = None
|
1933 | a2cfdea2 | Iustin Pop | est_time = None
|
1934 | a2cfdea2 | Iustin Pop | match = re.match("^ *[0-9]+: cs:([^ ]+).*$", line)
|
1935 | a2cfdea2 | Iustin Pop | if not match: |
1936 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find my data in /proc (minor %d)" % |
1937 | a2cfdea2 | Iustin Pop | self.minor)
|
1938 | a2cfdea2 | Iustin Pop | client_state = match.group(1)
|
1939 | a2cfdea2 | Iustin Pop | is_degraded = client_state != "Connected"
|
1940 | a2cfdea2 | Iustin Pop | return sync_percent, est_time, is_degraded
|
1941 | a2cfdea2 | Iustin Pop | |
1942 | a2cfdea2 | Iustin Pop | def GetStatus(self): |
1943 | a2cfdea2 | Iustin Pop | """Compute the status of the DRBD device
|
1944 | a2cfdea2 | Iustin Pop |
|
1945 | a2cfdea2 | Iustin Pop | Note that DRBD devices don't have the STATUS_EXISTING state.
|
1946 | a2cfdea2 | Iustin Pop |
|
1947 | a2cfdea2 | Iustin Pop | """
|
1948 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1949 | a2cfdea2 | Iustin Pop | return self.STATUS_UNKNOWN |
1950 | a2cfdea2 | Iustin Pop | |
1951 | a2cfdea2 | Iustin Pop | data = self._GetProcData()
|
1952 | a2cfdea2 | Iustin Pop | match = re.compile("^ *%d: cs:[^ ]+ st:(Primary|Secondary)/.*$" %
|
1953 | a2cfdea2 | Iustin Pop | self.minor)
|
1954 | a2cfdea2 | Iustin Pop | for line in data: |
1955 | a2cfdea2 | Iustin Pop | mresult = match.match(line) |
1956 | a2cfdea2 | Iustin Pop | if mresult:
|
1957 | a2cfdea2 | Iustin Pop | break
|
1958 | a2cfdea2 | Iustin Pop | else:
|
1959 | a2cfdea2 | Iustin Pop | logger.Error("Can't find myself!")
|
1960 | a2cfdea2 | Iustin Pop | return self.STATUS_UNKNOWN |
1961 | a2cfdea2 | Iustin Pop | |
1962 | a2cfdea2 | Iustin Pop | state = mresult.group(2)
|
1963 | a2cfdea2 | Iustin Pop | if state == "Primary": |
1964 | a2cfdea2 | Iustin Pop | result = self.STATUS_ONLINE
|
1965 | a2cfdea2 | Iustin Pop | else:
|
1966 | a2cfdea2 | Iustin Pop | result = self.STATUS_STANDBY
|
1967 | a2cfdea2 | Iustin Pop | |
1968 | a2cfdea2 | Iustin Pop | return result
|
1969 | a2cfdea2 | Iustin Pop | |
1970 | a2cfdea2 | Iustin Pop | def Open(self, force=False): |
1971 | a2cfdea2 | Iustin Pop | """Make the local state primary.
|
1972 | a2cfdea2 | Iustin Pop |
|
1973 | a2cfdea2 | Iustin Pop | If the 'force' parameter is given, the '--do-what-I-say' parameter
|
1974 | a2cfdea2 | Iustin Pop | is given. Since this is a pottentialy dangerous operation, the
|
1975 | a2cfdea2 | Iustin Pop | force flag should be only given after creation, when it actually
|
1976 | a2cfdea2 | Iustin Pop | has to be given.
|
1977 | a2cfdea2 | Iustin Pop |
|
1978 | a2cfdea2 | Iustin Pop | """
|
1979 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1980 | a2cfdea2 | Iustin Pop | logger.Error("DRBD cannot attach to a device during open")
|
1981 | a2cfdea2 | Iustin Pop | return False |
1982 | a2cfdea2 | Iustin Pop | cmd = ["drbdsetup", self.dev_path, "primary"] |
1983 | a2cfdea2 | Iustin Pop | if force:
|
1984 | a2cfdea2 | Iustin Pop | cmd.append("-o")
|
1985 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(cmd) |
1986 | a2cfdea2 | Iustin Pop | if result.failed:
|
1987 | a2cfdea2 | Iustin Pop | logger.Error("Can't make drbd device primary: %s" % result.output)
|
1988 | a2cfdea2 | Iustin Pop | return False |
1989 | a2cfdea2 | Iustin Pop | return True |
1990 | a2cfdea2 | Iustin Pop | |
1991 | a2cfdea2 | Iustin Pop | def Close(self): |
1992 | a2cfdea2 | Iustin Pop | """Make the local state secondary.
|
1993 | a2cfdea2 | Iustin Pop |
|
1994 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
1995 | a2cfdea2 | Iustin Pop |
|
1996 | a2cfdea2 | Iustin Pop | """
|
1997 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
1998 | a2cfdea2 | Iustin Pop | logger.Info("Instance not attached to a device")
|
1999 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't find device") |
2000 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", self.dev_path, "secondary"]) |
2001 | a2cfdea2 | Iustin Pop | if result.failed:
|
2002 | a2cfdea2 | Iustin Pop | logger.Error("Can't switch drbd device to secondary: %s" % result.output)
|
2003 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't switch drbd device to secondary") |
2004 | a2cfdea2 | Iustin Pop | |
2005 | a2cfdea2 | Iustin Pop | def Attach(self): |
2006 | a2cfdea2 | Iustin Pop | """Find a DRBD device which matches our config and attach to it.
|
2007 | a2cfdea2 | Iustin Pop |
|
2008 | a2cfdea2 | Iustin Pop | In case of partially attached (local device matches but no network
|
2009 | a2cfdea2 | Iustin Pop | setup), we perform the network attach. If successful, we re-test
|
2010 | a2cfdea2 | Iustin Pop | the attach if can return success.
|
2011 | a2cfdea2 | Iustin Pop |
|
2012 | a2cfdea2 | Iustin Pop | """
|
2013 | a2cfdea2 | Iustin Pop | for minor in self._GetUsedDevs(): |
2014 | a2cfdea2 | Iustin Pop | info = self._GetDevInfo(minor)
|
2015 | a2cfdea2 | Iustin Pop | match_l = self._MatchesLocal(info)
|
2016 | a2cfdea2 | Iustin Pop | match_r = self._MatchesNet(info)
|
2017 | a2cfdea2 | Iustin Pop | if match_l and match_r: |
2018 | a2cfdea2 | Iustin Pop | break
|
2019 | a2cfdea2 | Iustin Pop | if match_l and not match_r and "local_addr" not in info: |
2020 | a2cfdea2 | Iustin Pop | res_r = self._AssembleNet(minor,
|
2021 | a2cfdea2 | Iustin Pop | (self._lhost, self._lport, |
2022 | a2cfdea2 | Iustin Pop | self._rhost, self._rport), |
2023 | a2cfdea2 | Iustin Pop | "C")
|
2024 | a2cfdea2 | Iustin Pop | if res_r and self._MatchesNet(self._GetDevInfo(minor)): |
2025 | a2cfdea2 | Iustin Pop | break
|
2026 | a2cfdea2 | Iustin Pop | else:
|
2027 | a2cfdea2 | Iustin Pop | minor = None
|
2028 | a2cfdea2 | Iustin Pop | |
2029 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
2030 | a2cfdea2 | Iustin Pop | return minor is not None |
2031 | a2cfdea2 | Iustin Pop | |
2032 | a2cfdea2 | Iustin Pop | def Assemble(self): |
2033 | a2cfdea2 | Iustin Pop | """Assemble the drbd.
|
2034 | a2cfdea2 | Iustin Pop |
|
2035 | a2cfdea2 | Iustin Pop | Method:
|
2036 | a2cfdea2 | Iustin Pop | - if we have a local backing device, we bind to it by:
|
2037 | a2cfdea2 | Iustin Pop | - checking the list of used drbd devices
|
2038 | a2cfdea2 | Iustin Pop | - check if the local minor use of any of them is our own device
|
2039 | a2cfdea2 | Iustin Pop | - if yes, abort?
|
2040 | a2cfdea2 | Iustin Pop | - if not, bind
|
2041 | a2cfdea2 | Iustin Pop | - if we have a local/remote net info:
|
2042 | a2cfdea2 | Iustin Pop | - redo the local backing device step for the remote device
|
2043 | a2cfdea2 | Iustin Pop | - check if any drbd device is using the local port,
|
2044 | a2cfdea2 | Iustin Pop | if yes abort
|
2045 | a2cfdea2 | Iustin Pop | - check if any remote drbd device is using the remote
|
2046 | a2cfdea2 | Iustin Pop | port, if yes abort (for now)
|
2047 | a2cfdea2 | Iustin Pop | - bind our net port
|
2048 | a2cfdea2 | Iustin Pop | - bind the remote net port
|
2049 | a2cfdea2 | Iustin Pop |
|
2050 | a2cfdea2 | Iustin Pop | """
|
2051 | a2cfdea2 | Iustin Pop | self.Attach()
|
2052 | a2cfdea2 | Iustin Pop | if self.minor is not None: |
2053 | a2cfdea2 | Iustin Pop | logger.Info("Already assembled")
|
2054 | a2cfdea2 | Iustin Pop | return True |
2055 | a2cfdea2 | Iustin Pop | |
2056 | a2cfdea2 | Iustin Pop | result = super(DRBD8, self).Assemble() |
2057 | a2cfdea2 | Iustin Pop | if not result: |
2058 | a2cfdea2 | Iustin Pop | return result
|
2059 | a2cfdea2 | Iustin Pop | |
2060 | a2cfdea2 | Iustin Pop | minor = self._FindUnusedMinor()
|
2061 | a2cfdea2 | Iustin Pop | need_localdev_teardown = False
|
2062 | a2cfdea2 | Iustin Pop | if self._children[0]: |
2063 | a2cfdea2 | Iustin Pop | result = self._AssembleLocal(minor, self._children[0].dev_path, |
2064 | a2cfdea2 | Iustin Pop | self._children[1].dev_path) |
2065 | a2cfdea2 | Iustin Pop | if not result: |
2066 | a2cfdea2 | Iustin Pop | return False |
2067 | a2cfdea2 | Iustin Pop | need_localdev_teardown = True
|
2068 | a2cfdea2 | Iustin Pop | if self._lhost and self._lport and self._rhost and self._rport: |
2069 | a2cfdea2 | Iustin Pop | result = self._AssembleNet(minor,
|
2070 | a2cfdea2 | Iustin Pop | (self._lhost, self._lport, |
2071 | a2cfdea2 | Iustin Pop | self._rhost, self._rport), |
2072 | a2cfdea2 | Iustin Pop | "C")
|
2073 | a2cfdea2 | Iustin Pop | if not result: |
2074 | a2cfdea2 | Iustin Pop | if need_localdev_teardown:
|
2075 | a2cfdea2 | Iustin Pop | # we will ignore failures from this
|
2076 | a2cfdea2 | Iustin Pop | logger.Error("net setup failed, tearing down local device")
|
2077 | a2cfdea2 | Iustin Pop | self._ShutdownAll(minor)
|
2078 | a2cfdea2 | Iustin Pop | return False |
2079 | a2cfdea2 | Iustin Pop | self._SetFromMinor(minor)
|
2080 | a2cfdea2 | Iustin Pop | return True |
2081 | a2cfdea2 | Iustin Pop | |
2082 | a2cfdea2 | Iustin Pop | @classmethod
|
2083 | b00b95dd | Iustin Pop | def _ShutdownLocal(cls, minor): |
2084 | b00b95dd | Iustin Pop | """Detach from the local device.
|
2085 | b00b95dd | Iustin Pop |
|
2086 | b00b95dd | Iustin Pop | I/Os will continue to be served from the remote device. If we
|
2087 | b00b95dd | Iustin Pop | don't have a remote device, this operation will fail.
|
2088 | b00b95dd | Iustin Pop |
|
2089 | b00b95dd | Iustin Pop | """
|
2090 | b00b95dd | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "detach"]) |
2091 | b00b95dd | Iustin Pop | if result.failed:
|
2092 | b00b95dd | Iustin Pop | logger.Error("Can't detach local device: %s" % result.output)
|
2093 | b00b95dd | Iustin Pop | return not result.failed |
2094 | b00b95dd | Iustin Pop | |
2095 | b00b95dd | Iustin Pop | @classmethod
|
2096 | f3e513ad | Iustin Pop | def _ShutdownNet(cls, minor): |
2097 | f3e513ad | Iustin Pop | """Disconnect from the remote peer.
|
2098 | f3e513ad | Iustin Pop |
|
2099 | f3e513ad | Iustin Pop | This fails if we don't have a local device.
|
2100 | f3e513ad | Iustin Pop |
|
2101 | f3e513ad | Iustin Pop | """
|
2102 | f3e513ad | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "disconnect"]) |
2103 | f3e513ad | Iustin Pop | logger.Error("Can't shutdown network: %s" % result.output)
|
2104 | f3e513ad | Iustin Pop | return not result.failed |
2105 | f3e513ad | Iustin Pop | |
2106 | f3e513ad | Iustin Pop | @classmethod
|
2107 | a2cfdea2 | Iustin Pop | def _ShutdownAll(cls, minor): |
2108 | a2cfdea2 | Iustin Pop | """Deactivate the device.
|
2109 | a2cfdea2 | Iustin Pop |
|
2110 | a2cfdea2 | Iustin Pop | This will, of course, fail if the device is in use.
|
2111 | a2cfdea2 | Iustin Pop |
|
2112 | a2cfdea2 | Iustin Pop | """
|
2113 | a2cfdea2 | Iustin Pop | result = utils.RunCmd(["drbdsetup", cls._DevPath(minor), "down"]) |
2114 | a2cfdea2 | Iustin Pop | if result.failed:
|
2115 | a2cfdea2 | Iustin Pop | logger.Error("Can't shutdown drbd device: %s" % result.output)
|
2116 | a2cfdea2 | Iustin Pop | return not result.failed |
2117 | a2cfdea2 | Iustin Pop | |
2118 | a2cfdea2 | Iustin Pop | def Shutdown(self): |
2119 | a2cfdea2 | Iustin Pop | """Shutdown the DRBD device.
|
2120 | a2cfdea2 | Iustin Pop |
|
2121 | a2cfdea2 | Iustin Pop | """
|
2122 | a2cfdea2 | Iustin Pop | if self.minor is None and not self.Attach(): |
2123 | a2cfdea2 | Iustin Pop | logger.Info("DRBD device not attached to a device during Shutdown")
|
2124 | a2cfdea2 | Iustin Pop | return True |
2125 | a2cfdea2 | Iustin Pop | if not self._ShutdownAll(self.minor): |
2126 | a2cfdea2 | Iustin Pop | return False |
2127 | a2cfdea2 | Iustin Pop | self.minor = None |
2128 | a2cfdea2 | Iustin Pop | self.dev_path = None |
2129 | a2cfdea2 | Iustin Pop | return True |
2130 | a2cfdea2 | Iustin Pop | |
2131 | f3e513ad | Iustin Pop | def Rename(self, new_uid): |
2132 | f3e513ad | Iustin Pop | """Re-connect this device to another peer.
|
2133 | f3e513ad | Iustin Pop |
|
2134 | f3e513ad | Iustin Pop | """
|
2135 | f3e513ad | Iustin Pop | if self.minor is None: |
2136 | f3e513ad | Iustin Pop | raise errors.BlockDeviceError("Device not attached during rename") |
2137 | f3e513ad | Iustin Pop | if self._rhost is not None: |
2138 | f3e513ad | Iustin Pop | # this means we did have a host when we attached, so we are connected
|
2139 | f3e513ad | Iustin Pop | if not self._ShutdownNet(self.minor): |
2140 | f3e513ad | Iustin Pop | raise errors.BlockDeviceError("Can't disconnect from remote peer") |
2141 | f3e513ad | Iustin Pop | old_id = self.unique_id
|
2142 | f3e513ad | Iustin Pop | else:
|
2143 | f3e513ad | Iustin Pop | old_id = None
|
2144 | f3e513ad | Iustin Pop | self.unique_id = new_uid
|
2145 | f3e513ad | Iustin Pop | if not self._AssembleNet(self.minor, self.unique_id, "C"): |
2146 | f3e513ad | Iustin Pop | logger.Error("Can't attach to new peer!")
|
2147 | f3e513ad | Iustin Pop | if self.old_id is not None: |
2148 | f3e513ad | Iustin Pop | self._AssembleNet(self.minor, old_id, "C") |
2149 | f3e513ad | Iustin Pop | self.unique_id = old_id
|
2150 | f3e513ad | Iustin Pop | raise errors.BlockDeviceError("Can't attach to new peer") |
2151 | f3e513ad | Iustin Pop | |
2152 | a2cfdea2 | Iustin Pop | def Remove(self): |
2153 | a2cfdea2 | Iustin Pop | """Stub remove for DRBD devices.
|
2154 | a2cfdea2 | Iustin Pop |
|
2155 | a2cfdea2 | Iustin Pop | """
|
2156 | a2cfdea2 | Iustin Pop | return self.Shutdown() |
2157 | a2cfdea2 | Iustin Pop | |
2158 | a2cfdea2 | Iustin Pop | @classmethod
|
2159 | a2cfdea2 | Iustin Pop | def Create(cls, unique_id, children, size): |
2160 | a2cfdea2 | Iustin Pop | """Create a new DRBD8 device.
|
2161 | a2cfdea2 | Iustin Pop |
|
2162 | a2cfdea2 | Iustin Pop | Since DRBD devices are not created per se, just assembled, this
|
2163 | a2cfdea2 | Iustin Pop | function only initializes the metadata.
|
2164 | a2cfdea2 | Iustin Pop |
|
2165 | a2cfdea2 | Iustin Pop | """
|
2166 | a2cfdea2 | Iustin Pop | if len(children) != 2: |
2167 | a2cfdea2 | Iustin Pop | raise errors.ProgrammerError("Invalid setup for the drbd device") |
2168 | a2cfdea2 | Iustin Pop | meta = children[1]
|
2169 | a2cfdea2 | Iustin Pop | meta.Assemble() |
2170 | a2cfdea2 | Iustin Pop | if not meta.Attach(): |
2171 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Can't attach to meta device") |
2172 | a2cfdea2 | Iustin Pop | if not cls._CheckMetaSize(meta.dev_path): |
2173 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Invalid meta device size") |
2174 | a2cfdea2 | Iustin Pop | cls._InitMeta(cls._FindUnusedMinor(), meta.dev_path) |
2175 | a2cfdea2 | Iustin Pop | if not cls._IsValidMeta(meta.dev_path): |
2176 | a2cfdea2 | Iustin Pop | raise errors.BlockDeviceError("Cannot initalize meta device") |
2177 | a2cfdea2 | Iustin Pop | return cls(unique_id, children)
|
2178 | a2cfdea2 | Iustin Pop | |
2179 | a8083063 | Iustin Pop | |
2180 | a8083063 | Iustin Pop | DEV_MAP = { |
2181 | fe96220b | Iustin Pop | constants.LD_LV: LogicalVolume, |
2182 | fe96220b | Iustin Pop | constants.LD_MD_R1: MDRaid1, |
2183 | fe96220b | Iustin Pop | constants.LD_DRBD7: DRBDev, |
2184 | a1f445d3 | Iustin Pop | constants.LD_DRBD8: DRBD8, |
2185 | a8083063 | Iustin Pop | } |
2186 | a8083063 | Iustin Pop | |
2187 | a8083063 | Iustin Pop | |
2188 | a8083063 | Iustin Pop | def FindDevice(dev_type, unique_id, children): |
2189 | a8083063 | Iustin Pop | """Search for an existing, assembled device.
|
2190 | a8083063 | Iustin Pop |
|
2191 | a8083063 | Iustin Pop | This will succeed only if the device exists and is assembled, but it
|
2192 | a8083063 | Iustin Pop | does not do any actions in order to activate the device.
|
2193 | a8083063 | Iustin Pop |
|
2194 | a8083063 | Iustin Pop | """
|
2195 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
2196 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
2197 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children) |
2198 | a8083063 | Iustin Pop | if not device.Attach(): |
2199 | a8083063 | Iustin Pop | return None |
2200 | a8083063 | Iustin Pop | return device
|
2201 | a8083063 | Iustin Pop | |
2202 | a8083063 | Iustin Pop | |
2203 | a8083063 | Iustin Pop | def AttachOrAssemble(dev_type, unique_id, children): |
2204 | a8083063 | Iustin Pop | """Try to attach or assemble an existing device.
|
2205 | a8083063 | Iustin Pop |
|
2206 | a8083063 | Iustin Pop | This will attach to an existing assembled device or will assemble
|
2207 | a8083063 | Iustin Pop | the device, as needed, to bring it fully up.
|
2208 | a8083063 | Iustin Pop |
|
2209 | a8083063 | Iustin Pop | """
|
2210 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
2211 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
2212 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type](unique_id, children) |
2213 | a8083063 | Iustin Pop | if not device.Attach(): |
2214 | a8083063 | Iustin Pop | device.Assemble() |
2215 | a8083063 | Iustin Pop | if not device.Attach(): |
2216 | a8083063 | Iustin Pop | raise errors.BlockDeviceError("Can't find a valid block device for" |
2217 | a8083063 | Iustin Pop | " %s/%s/%s" %
|
2218 | a8083063 | Iustin Pop | (dev_type, unique_id, children)) |
2219 | a8083063 | Iustin Pop | return device
|
2220 | a8083063 | Iustin Pop | |
2221 | a8083063 | Iustin Pop | |
2222 | a8083063 | Iustin Pop | def Create(dev_type, unique_id, children, size): |
2223 | a8083063 | Iustin Pop | """Create a device.
|
2224 | a8083063 | Iustin Pop |
|
2225 | a8083063 | Iustin Pop | """
|
2226 | a8083063 | Iustin Pop | if dev_type not in DEV_MAP: |
2227 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid block device type '%s'" % dev_type) |
2228 | a8083063 | Iustin Pop | device = DEV_MAP[dev_type].Create(unique_id, children, size) |
2229 | a8083063 | Iustin Pop | return device |