root / lib / hypervisor / hv_base.py @ bc0fed4b
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1 | 65a6f9b7 | Michael Hanselmann | #
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2 | 65a6f9b7 | Michael Hanselmann | #
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3 | 65a6f9b7 | Michael Hanselmann | |
4 | 5ae4945a | Iustin Pop | # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2012 Google Inc.
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5 | 65a6f9b7 | Michael Hanselmann | #
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6 | 65a6f9b7 | Michael Hanselmann | # This program is free software; you can redistribute it and/or modify
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7 | 65a6f9b7 | Michael Hanselmann | # it under the terms of the GNU General Public License as published by
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8 | 65a6f9b7 | Michael Hanselmann | # the Free Software Foundation; either version 2 of the License, or
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9 | 65a6f9b7 | Michael Hanselmann | # (at your option) any later version.
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10 | 65a6f9b7 | Michael Hanselmann | #
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11 | 65a6f9b7 | Michael Hanselmann | # This program is distributed in the hope that it will be useful, but
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12 | 65a6f9b7 | Michael Hanselmann | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 65a6f9b7 | Michael Hanselmann | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 65a6f9b7 | Michael Hanselmann | # General Public License for more details.
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15 | 65a6f9b7 | Michael Hanselmann | #
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16 | 65a6f9b7 | Michael Hanselmann | # You should have received a copy of the GNU General Public License
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17 | 65a6f9b7 | Michael Hanselmann | # along with this program; if not, write to the Free Software
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18 | 65a6f9b7 | Michael Hanselmann | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 65a6f9b7 | Michael Hanselmann | # 02110-1301, USA.
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20 | 65a6f9b7 | Michael Hanselmann | |
21 | 65a6f9b7 | Michael Hanselmann | |
22 | 65a6f9b7 | Michael Hanselmann | """Base class for all hypervisors
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23 | 65a6f9b7 | Michael Hanselmann |
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24 | 205ab586 | Iustin Pop | The syntax for the _CHECK variables and the contents of the PARAMETERS
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25 | 205ab586 | Iustin Pop | dict is the same, see the docstring for L{BaseHypervisor.PARAMETERS}.
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26 | 205ab586 | Iustin Pop |
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27 | 205ab586 | Iustin Pop | @var _FILE_CHECK: stub for file checks, without the required flag
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28 | 205ab586 | Iustin Pop | @var _DIR_CHECK: stub for directory checks, without the required flag
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29 | 205ab586 | Iustin Pop | @var REQ_FILE_CHECK: mandatory file parameter
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30 | 205ab586 | Iustin Pop | @var OPT_FILE_CHECK: optional file parameter
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31 | 205ab586 | Iustin Pop | @var REQ_DIR_CHECK: mandatory directory parametr
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32 | 205ab586 | Iustin Pop | @var OPT_DIR_CHECK: optional directory parameter
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33 | 205ab586 | Iustin Pop | @var NO_CHECK: parameter without any checks at all
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34 | 205ab586 | Iustin Pop | @var REQUIRED_CHECK: parameter required to exist (and non-false), but
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35 | 205ab586 | Iustin Pop | without other checks; beware that this can't be used for boolean
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36 | 205ab586 | Iustin Pop | parameters, where you should use NO_CHECK or a custom checker
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37 | 205ab586 | Iustin Pop |
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38 | 65a6f9b7 | Michael Hanselmann | """
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39 | 65a6f9b7 | Michael Hanselmann | |
40 | 205ab586 | Iustin Pop | import os |
41 | 572e52bf | Iustin Pop | import re |
42 | 29921401 | Iustin Pop | import logging |
43 | 572e52bf | Iustin Pop | |
44 | 572e52bf | Iustin Pop | |
45 | f48148c3 | Iustin Pop | from ganeti import errors |
46 | 205ab586 | Iustin Pop | from ganeti import utils |
47 | e71b9ef4 | Iustin Pop | from ganeti import constants |
48 | 205ab586 | Iustin Pop | |
49 | 205ab586 | Iustin Pop | |
50 | e3ed5316 | Balazs Lecz | def _IsCpuMaskWellFormed(cpu_mask): |
51 | b9511385 | Tsachy Shacham | """Verifies if the given single CPU mask is valid
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52 | b9511385 | Tsachy Shacham |
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53 | b9511385 | Tsachy Shacham | The single CPU mask should be in the form "a,b,c,d", where each
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54 | b9511385 | Tsachy Shacham | letter is a positive number or range.
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55 | b9511385 | Tsachy Shacham |
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56 | b9511385 | Tsachy Shacham | """
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57 | e3ed5316 | Balazs Lecz | try:
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58 | e3ed5316 | Balazs Lecz | cpu_list = utils.ParseCpuMask(cpu_mask) |
59 | e3ed5316 | Balazs Lecz | except errors.ParseError, _:
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60 | e3ed5316 | Balazs Lecz | return False |
61 | e3ed5316 | Balazs Lecz | return isinstance(cpu_list, list) and len(cpu_list) > 0 |
62 | e3ed5316 | Balazs Lecz | |
63 | e3ed5316 | Balazs Lecz | |
64 | b9511385 | Tsachy Shacham | def _IsMultiCpuMaskWellFormed(cpu_mask): |
65 | b9511385 | Tsachy Shacham | """Verifies if the given multiple CPU mask is valid
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66 | b9511385 | Tsachy Shacham |
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67 | b9511385 | Tsachy Shacham | A valid multiple CPU mask is in the form "a:b:c:d", where each
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68 | b9511385 | Tsachy Shacham | letter is a single CPU mask.
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69 | b9511385 | Tsachy Shacham |
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70 | b9511385 | Tsachy Shacham | """
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71 | b9511385 | Tsachy Shacham | try:
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72 | b9511385 | Tsachy Shacham | utils.ParseMultiCpuMask(cpu_mask) |
73 | b9511385 | Tsachy Shacham | except errors.ParseError, _:
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74 | b9511385 | Tsachy Shacham | return False |
75 | b9511385 | Tsachy Shacham | |
76 | b9511385 | Tsachy Shacham | return True |
77 | b9511385 | Tsachy Shacham | |
78 | b9511385 | Tsachy Shacham | |
79 | 205ab586 | Iustin Pop | # Read the BaseHypervisor.PARAMETERS docstring for the syntax of the
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80 | 205ab586 | Iustin Pop | # _CHECK values
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81 | 205ab586 | Iustin Pop | |
82 | 205ab586 | Iustin Pop | # must be afile
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83 | 17c61836 | Guido Trotter | _FILE_CHECK = (utils.IsNormAbsPath, "must be an absolute normalized path",
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84 | 5ae4945a | Iustin Pop | os.path.isfile, "not found or not a file")
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85 | 205ab586 | Iustin Pop | |
86 | 205ab586 | Iustin Pop | # must be a directory
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87 | 17c61836 | Guido Trotter | _DIR_CHECK = (utils.IsNormAbsPath, "must be an absolute normalized path",
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88 | 5ae4945a | Iustin Pop | os.path.isdir, "not found or not a directory")
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89 | 205ab586 | Iustin Pop | |
90 | e3ed5316 | Balazs Lecz | # CPU mask must be well-formed
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91 | e3ed5316 | Balazs Lecz | # TODO: implement node level check for the CPU mask
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92 | e3ed5316 | Balazs Lecz | _CPU_MASK_CHECK = (_IsCpuMaskWellFormed, |
93 | e3ed5316 | Balazs Lecz | "CPU mask definition is not well-formed",
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94 | e3ed5316 | Balazs Lecz | None, None) |
95 | e3ed5316 | Balazs Lecz | |
96 | b9511385 | Tsachy Shacham | # Multiple CPU mask must be well-formed
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97 | b9511385 | Tsachy Shacham | _MULTI_CPU_MASK_CHECK = (_IsMultiCpuMaskWellFormed, |
98 | b9511385 | Tsachy Shacham | "Multiple CPU mask definition is not well-formed",
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99 | b9511385 | Tsachy Shacham | None, None) |
100 | b9511385 | Tsachy Shacham | |
101 | e2d14329 | Andrea Spadaccini | # Check for validity of port number
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102 | e2d14329 | Andrea Spadaccini | _NET_PORT_CHECK = (lambda x: 0 < x < 65535, "invalid port number", |
103 | e2d14329 | Andrea Spadaccini | None, None) |
104 | e2d14329 | Andrea Spadaccini | |
105 | 2c368f28 | Guido Trotter | # Check that an integer is non negative
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106 | 2c368f28 | Guido Trotter | _NONNEGATIVE_INT_CHECK = (lambda x: x >= 0, "cannot be negative", None, None) |
107 | 2c368f28 | Guido Trotter | |
108 | 205ab586 | Iustin Pop | # nice wrappers for users
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109 | 205ab586 | Iustin Pop | REQ_FILE_CHECK = (True, ) + _FILE_CHECK
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110 | 205ab586 | Iustin Pop | OPT_FILE_CHECK = (False, ) + _FILE_CHECK
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111 | 205ab586 | Iustin Pop | REQ_DIR_CHECK = (True, ) + _DIR_CHECK
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112 | 205ab586 | Iustin Pop | OPT_DIR_CHECK = (False, ) + _DIR_CHECK
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113 | e2d14329 | Andrea Spadaccini | REQ_NET_PORT_CHECK = (True, ) + _NET_PORT_CHECK
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114 | e2d14329 | Andrea Spadaccini | OPT_NET_PORT_CHECK = (False, ) + _NET_PORT_CHECK
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115 | e3ed5316 | Balazs Lecz | REQ_CPU_MASK_CHECK = (True, ) + _CPU_MASK_CHECK
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116 | e2d14329 | Andrea Spadaccini | OPT_CPU_MASK_CHECK = (False, ) + _CPU_MASK_CHECK
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117 | b9511385 | Tsachy Shacham | REQ_MULTI_CPU_MASK_CHECK = (True, ) + _MULTI_CPU_MASK_CHECK
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118 | b9511385 | Tsachy Shacham | OPT_MULTI_CPU_MASK_CHECK = (False, ) + _MULTI_CPU_MASK_CHECK
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119 | 2c368f28 | Guido Trotter | REQ_NONNEGATIVE_INT_CHECK = (True, ) + _NONNEGATIVE_INT_CHECK
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120 | 2c368f28 | Guido Trotter | OPT_NONNEGATIVE_INT_CHECK = (False, ) + _NONNEGATIVE_INT_CHECK
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121 | 205ab586 | Iustin Pop | |
122 | 205ab586 | Iustin Pop | # no checks at all
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123 | 205ab586 | Iustin Pop | NO_CHECK = (False, None, None, None, None) |
124 | 205ab586 | Iustin Pop | |
125 | 205ab586 | Iustin Pop | # required, but no other checks
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126 | 205ab586 | Iustin Pop | REQUIRED_CHECK = (True, None, None, None, None) |
127 | 205ab586 | Iustin Pop | |
128 | e71b9ef4 | Iustin Pop | # migration type
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129 | 783a6c0b | Iustin Pop | MIGRATION_MODE_CHECK = (True, lambda x: x in constants.HT_MIGRATION_MODES, |
130 | 783a6c0b | Iustin Pop | "invalid migration mode", None, None) |
131 | e71b9ef4 | Iustin Pop | |
132 | d73ef63f | Michael Hanselmann | |
133 | 205ab586 | Iustin Pop | def ParamInSet(required, my_set): |
134 | 205ab586 | Iustin Pop | """Builds parameter checker for set membership.
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135 | 205ab586 | Iustin Pop |
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136 | 205ab586 | Iustin Pop | @type required: boolean
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137 | 205ab586 | Iustin Pop | @param required: whether this is a required parameter
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138 | 205ab586 | Iustin Pop | @type my_set: tuple, list or set
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139 | 205ab586 | Iustin Pop | @param my_set: allowed values set
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140 | 205ab586 | Iustin Pop |
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141 | 205ab586 | Iustin Pop | """
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142 | 205ab586 | Iustin Pop | fn = lambda x: x in my_set |
143 | ab3e6da8 | Iustin Pop | err = ("The value must be one of: %s" % utils.CommaJoin(my_set))
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144 | 205ab586 | Iustin Pop | return (required, fn, err, None, None) |
145 | f48148c3 | Iustin Pop | |
146 | f48148c3 | Iustin Pop | |
147 | 65a6f9b7 | Michael Hanselmann | class BaseHypervisor(object): |
148 | 65a6f9b7 | Michael Hanselmann | """Abstract virtualisation technology interface
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149 | 65a6f9b7 | Michael Hanselmann |
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150 | f48148c3 | Iustin Pop | The goal is that all aspects of the virtualisation technology are
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151 | f48148c3 | Iustin Pop | abstracted away from the rest of code.
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152 | 65a6f9b7 | Michael Hanselmann |
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153 | 205ab586 | Iustin Pop | @cvar PARAMETERS: a dict of parameter name: check type; the check type is
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154 | 205ab586 | Iustin Pop | a five-tuple containing:
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155 | 205ab586 | Iustin Pop | - the required flag (boolean)
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156 | 205ab586 | Iustin Pop | - a function to check for syntax, that will be used in
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157 | 205ab586 | Iustin Pop | L{CheckParameterSyntax}, in the master daemon process
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158 | 205ab586 | Iustin Pop | - an error message for the above function
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159 | 205ab586 | Iustin Pop | - a function to check for parameter validity on the remote node,
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160 | 205ab586 | Iustin Pop | in the L{ValidateParameters} function
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161 | 205ab586 | Iustin Pop | - an error message for the above function
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162 | d271c6fd | Iustin Pop | @type CAN_MIGRATE: boolean
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163 | d271c6fd | Iustin Pop | @cvar CAN_MIGRATE: whether this hypervisor can do migration (either
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164 | d271c6fd | Iustin Pop | live or non-live)
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165 | 205ab586 | Iustin Pop |
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166 | 65a6f9b7 | Michael Hanselmann | """
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167 | 205ab586 | Iustin Pop | PARAMETERS = {} |
168 | e1b8653f | Guido Trotter | ANCILLARY_FILES = [] |
169 | 69ab2e12 | Guido Trotter | ANCILLARY_FILES_OPT = [] |
170 | d271c6fd | Iustin Pop | CAN_MIGRATE = False
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171 | f48148c3 | Iustin Pop | |
172 | 323f9095 | Stephen Shirley | def StartInstance(self, instance, block_devices, startup_paused): |
173 | 65a6f9b7 | Michael Hanselmann | """Start an instance."""
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174 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
175 | 65a6f9b7 | Michael Hanselmann | |
176 | bbcf7ad0 | Iustin Pop | def StopInstance(self, instance, force=False, retry=False, name=None): |
177 | 07b49e41 | Guido Trotter | """Stop an instance
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178 | 07b49e41 | Guido Trotter |
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179 | 07b49e41 | Guido Trotter | @type instance: L{objects.Instance}
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180 | 07b49e41 | Guido Trotter | @param instance: instance to stop
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181 | 07b49e41 | Guido Trotter | @type force: boolean
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182 | 07b49e41 | Guido Trotter | @param force: whether to do a "hard" stop (destroy)
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183 | 07b49e41 | Guido Trotter | @type retry: boolean
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184 | 07b49e41 | Guido Trotter | @param retry: whether this is just a retry call
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185 | bbcf7ad0 | Iustin Pop | @type name: string or None
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186 | bbcf7ad0 | Iustin Pop | @param name: if this parameter is passed, the the instance object
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187 | bbcf7ad0 | Iustin Pop | should not be used (will be passed as None), and the shutdown
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188 | bbcf7ad0 | Iustin Pop | must be done by name only
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189 | 07b49e41 | Guido Trotter |
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190 | 07b49e41 | Guido Trotter | """
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191 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
192 | 65a6f9b7 | Michael Hanselmann | |
193 | f28ec899 | Guido Trotter | def CleanupInstance(self, instance_name): |
194 | f28ec899 | Guido Trotter | """Cleanup after a stopped instance
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195 | f28ec899 | Guido Trotter |
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196 | f28ec899 | Guido Trotter | This is an optional method, used by hypervisors that need to cleanup after
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197 | f28ec899 | Guido Trotter | an instance has been stopped.
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198 | f28ec899 | Guido Trotter |
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199 | f28ec899 | Guido Trotter | @type instance_name: string
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200 | f28ec899 | Guido Trotter | @param instance_name: instance name to cleanup after
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201 | f28ec899 | Guido Trotter |
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202 | f28ec899 | Guido Trotter | """
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203 | f28ec899 | Guido Trotter | pass
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204 | f28ec899 | Guido Trotter | |
205 | 65a6f9b7 | Michael Hanselmann | def RebootInstance(self, instance): |
206 | 65a6f9b7 | Michael Hanselmann | """Reboot an instance."""
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207 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
208 | 65a6f9b7 | Michael Hanselmann | |
209 | 65a6f9b7 | Michael Hanselmann | def ListInstances(self): |
210 | 65a6f9b7 | Michael Hanselmann | """Get the list of running instances."""
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211 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
212 | 65a6f9b7 | Michael Hanselmann | |
213 | 65a6f9b7 | Michael Hanselmann | def GetInstanceInfo(self, instance_name): |
214 | 65a6f9b7 | Michael Hanselmann | """Get instance properties.
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215 | 65a6f9b7 | Michael Hanselmann |
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216 | cd42d0ad | Guido Trotter | @type instance_name: string
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217 | c41eea6e | Iustin Pop | @param instance_name: the instance name
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218 | 65a6f9b7 | Michael Hanselmann |
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219 | c41eea6e | Iustin Pop | @return: tuple (name, id, memory, vcpus, state, times)
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220 | 65a6f9b7 | Michael Hanselmann |
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221 | 65a6f9b7 | Michael Hanselmann | """
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222 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
223 | 65a6f9b7 | Michael Hanselmann | |
224 | 65a6f9b7 | Michael Hanselmann | def GetAllInstancesInfo(self): |
225 | 65a6f9b7 | Michael Hanselmann | """Get properties of all instances.
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226 | 65a6f9b7 | Michael Hanselmann |
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227 | c41eea6e | Iustin Pop | @return: list of tuples (name, id, memory, vcpus, stat, times)
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228 | c41eea6e | Iustin Pop |
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229 | 65a6f9b7 | Michael Hanselmann | """
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230 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
231 | 65a6f9b7 | Michael Hanselmann | |
232 | 65a6f9b7 | Michael Hanselmann | def GetNodeInfo(self): |
233 | 65a6f9b7 | Michael Hanselmann | """Return information about the node.
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234 | 65a6f9b7 | Michael Hanselmann |
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235 | c41eea6e | Iustin Pop | @return: a dict with the following keys (values in MiB):
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236 | c41eea6e | Iustin Pop | - memory_total: the total memory size on the node
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237 | c41eea6e | Iustin Pop | - memory_free: the available memory on the node for instances
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238 | c41eea6e | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
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239 | 65a6f9b7 | Michael Hanselmann |
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240 | 65a6f9b7 | Michael Hanselmann | """
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241 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
242 | 65a6f9b7 | Michael Hanselmann | |
243 | 637ce7f9 | Guido Trotter | @classmethod
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244 | 55cc0a44 | Michael Hanselmann | def GetInstanceConsole(cls, instance, hvparams, beparams): |
245 | 55cc0a44 | Michael Hanselmann | """Return information for connecting to the console of an instance.
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246 | 65a6f9b7 | Michael Hanselmann |
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247 | 65a6f9b7 | Michael Hanselmann | """
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248 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
249 | 65a6f9b7 | Michael Hanselmann | |
250 | e1b8653f | Guido Trotter | @classmethod
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251 | e1b8653f | Guido Trotter | def GetAncillaryFiles(cls): |
252 | e1b8653f | Guido Trotter | """Return a list of ancillary files to be copied to all nodes as ancillary
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253 | e1b8653f | Guido Trotter | configuration files.
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254 | e1b8653f | Guido Trotter |
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255 | 69ab2e12 | Guido Trotter | @rtype: (list of absolute paths, list of absolute paths)
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256 | 69ab2e12 | Guido Trotter | @return: (all files, optional files)
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257 | e1b8653f | Guido Trotter |
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258 | e1b8653f | Guido Trotter | """
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259 | e1b8653f | Guido Trotter | # By default we return a member variable, so that if an hypervisor has just
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260 | e1b8653f | Guido Trotter | # a static list of files it doesn't have to override this function.
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261 | 69ab2e12 | Guido Trotter | assert set(cls.ANCILLARY_FILES).issuperset(cls.ANCILLARY_FILES_OPT), \ |
262 | 69ab2e12 | Guido Trotter | "Optional ancillary files must be a subset of ancillary files"
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263 | 69ab2e12 | Guido Trotter | |
264 | 69ab2e12 | Guido Trotter | return (cls.ANCILLARY_FILES, cls.ANCILLARY_FILES_OPT)
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265 | e1b8653f | Guido Trotter | |
266 | 65a6f9b7 | Michael Hanselmann | def Verify(self): |
267 | 65a6f9b7 | Michael Hanselmann | """Verify the hypervisor.
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268 | 65a6f9b7 | Michael Hanselmann |
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269 | cd04dfd2 | Michael Hanselmann | @return: Problem description if something is wrong, C{None} otherwise
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270 | cd04dfd2 | Michael Hanselmann |
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271 | 65a6f9b7 | Michael Hanselmann | """
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272 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
273 | 6e7275c0 | Iustin Pop | |
274 | b459a848 | Andrea Spadaccini | def MigrationInfo(self, instance): # pylint: disable=R0201,W0613 |
275 | cd42d0ad | Guido Trotter | """Get instance information to perform a migration.
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276 | cd42d0ad | Guido Trotter |
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277 | cd42d0ad | Guido Trotter | By default assume no information is needed.
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278 | cd42d0ad | Guido Trotter |
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279 | cd42d0ad | Guido Trotter | @type instance: L{objects.Instance}
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280 | cd42d0ad | Guido Trotter | @param instance: instance to be migrated
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281 | cd42d0ad | Guido Trotter | @rtype: string/data (opaque)
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282 | cd42d0ad | Guido Trotter | @return: instance migration information - serialized form
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283 | cd42d0ad | Guido Trotter |
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284 | cd42d0ad | Guido Trotter | """
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285 | d0c8c01d | Iustin Pop | return "" |
286 | cd42d0ad | Guido Trotter | |
287 | cd42d0ad | Guido Trotter | def AcceptInstance(self, instance, info, target): |
288 | cd42d0ad | Guido Trotter | """Prepare to accept an instance.
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289 | cd42d0ad | Guido Trotter |
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290 | cd42d0ad | Guido Trotter | By default assume no preparation is needed.
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291 | cd42d0ad | Guido Trotter |
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292 | cd42d0ad | Guido Trotter | @type instance: L{objects.Instance}
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293 | cd42d0ad | Guido Trotter | @param instance: instance to be accepted
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294 | cd42d0ad | Guido Trotter | @type info: string/data (opaque)
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295 | cd42d0ad | Guido Trotter | @param info: migration information, from the source node
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296 | cd42d0ad | Guido Trotter | @type target: string
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297 | cd42d0ad | Guido Trotter | @param target: target host (usually ip), on this node
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298 | cd42d0ad | Guido Trotter |
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299 | cd42d0ad | Guido Trotter | """
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300 | cd42d0ad | Guido Trotter | pass
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301 | cd42d0ad | Guido Trotter | |
302 | b990eedd | Guido Trotter | def BalloonInstanceMemory(self, instance, mem): |
303 | b990eedd | Guido Trotter | """Balloon an instance memory to a certain value.
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304 | b990eedd | Guido Trotter |
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305 | b990eedd | Guido Trotter | @type instance: L{objects.Instance}
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306 | b990eedd | Guido Trotter | @param instance: instance to be accepted
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307 | b990eedd | Guido Trotter | @type mem: int
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308 | b990eedd | Guido Trotter | @param mem: actual memory size to use for instance runtime
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309 | b990eedd | Guido Trotter |
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310 | b990eedd | Guido Trotter | """
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311 | b990eedd | Guido Trotter | raise NotImplementedError |
312 | b990eedd | Guido Trotter | |
313 | 6a1434d7 | Andrea Spadaccini | def FinalizeMigrationDst(self, instance, info, success): |
314 | 6a1434d7 | Andrea Spadaccini | """Finalize the instance migration on the target node.
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315 | cd42d0ad | Guido Trotter |
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316 | cd42d0ad | Guido Trotter | Should finalize or revert any preparation done to accept the instance.
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317 | cd42d0ad | Guido Trotter | Since by default we do no preparation, we also don't have anything to do
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318 | cd42d0ad | Guido Trotter |
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319 | cd42d0ad | Guido Trotter | @type instance: L{objects.Instance}
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320 | fea922fa | Guido Trotter | @param instance: instance whose migration is being finalized
|
321 | cd42d0ad | Guido Trotter | @type info: string/data (opaque)
|
322 | cd42d0ad | Guido Trotter | @param info: migration information, from the source node
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323 | cd42d0ad | Guido Trotter | @type success: boolean
|
324 | cd42d0ad | Guido Trotter | @param success: whether the migration was a success or a failure
|
325 | cd42d0ad | Guido Trotter |
|
326 | cd42d0ad | Guido Trotter | """
|
327 | cd42d0ad | Guido Trotter | pass
|
328 | cd42d0ad | Guido Trotter | |
329 | 58d38b02 | Iustin Pop | def MigrateInstance(self, instance, target, live): |
330 | 6e7275c0 | Iustin Pop | """Migrate an instance.
|
331 | 6e7275c0 | Iustin Pop |
|
332 | 3a488770 | Iustin Pop | @type instance: L{objects.Instance}
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333 | 9044275a | Michael Hanselmann | @param instance: the instance to be migrated
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334 | cd42d0ad | Guido Trotter | @type target: string
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335 | cd42d0ad | Guido Trotter | @param target: hostname (usually ip) of the target node
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336 | cd42d0ad | Guido Trotter | @type live: boolean
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337 | cd42d0ad | Guido Trotter | @param live: whether to do a live or non-live migration
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338 | 6e7275c0 | Iustin Pop |
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339 | 6e7275c0 | Iustin Pop | """
|
340 | 6e7275c0 | Iustin Pop | raise NotImplementedError |
341 | f48148c3 | Iustin Pop | |
342 | 6a1434d7 | Andrea Spadaccini | def FinalizeMigrationSource(self, instance, success, live): |
343 | 6a1434d7 | Andrea Spadaccini | """Finalize the instance migration on the source node.
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344 | 6a1434d7 | Andrea Spadaccini |
|
345 | 6a1434d7 | Andrea Spadaccini | @type instance: L{objects.Instance}
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346 | 6a1434d7 | Andrea Spadaccini | @param instance: the instance that was migrated
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347 | 6a1434d7 | Andrea Spadaccini | @type success: bool
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348 | 6a1434d7 | Andrea Spadaccini | @param success: whether the migration succeeded or not
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349 | 6a1434d7 | Andrea Spadaccini | @type live: bool
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350 | 6a1434d7 | Andrea Spadaccini | @param live: whether the user requested a live migration or not
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351 | 6a1434d7 | Andrea Spadaccini |
|
352 | 6a1434d7 | Andrea Spadaccini | """
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353 | 6a1434d7 | Andrea Spadaccini | pass
|
354 | 6a1434d7 | Andrea Spadaccini | |
355 | 6a1434d7 | Andrea Spadaccini | def GetMigrationStatus(self, instance): |
356 | 6a1434d7 | Andrea Spadaccini | """Get the migration status
|
357 | 6a1434d7 | Andrea Spadaccini |
|
358 | 6a1434d7 | Andrea Spadaccini | @type instance: L{objects.Instance}
|
359 | 6a1434d7 | Andrea Spadaccini | @param instance: the instance that is being migrated
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360 | 6a1434d7 | Andrea Spadaccini | @rtype: L{objects.MigrationStatus}
|
361 | 6a1434d7 | Andrea Spadaccini | @return: the status of the current migration (one of
|
362 | 6a1434d7 | Andrea Spadaccini | L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
|
363 | 6a1434d7 | Andrea Spadaccini | progress info that can be retrieved from the hypervisor
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364 | 6a1434d7 | Andrea Spadaccini |
|
365 | 6a1434d7 | Andrea Spadaccini | """
|
366 | 6a1434d7 | Andrea Spadaccini | raise NotImplementedError |
367 | 6a1434d7 | Andrea Spadaccini | |
368 | 61eb1a46 | Guido Trotter | def _InstanceStartupMemory(self, instance): |
369 | 61eb1a46 | Guido Trotter | """Get the correct startup memory for an instance
|
370 | 61eb1a46 | Guido Trotter |
|
371 | 61eb1a46 | Guido Trotter | This function calculates how much memory an instance should be started
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372 | 61eb1a46 | Guido Trotter | with, making sure it's a value between the minimum and the maximum memory,
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373 | 61eb1a46 | Guido Trotter | but also trying to use no more than the current free memory on the node.
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374 | 61eb1a46 | Guido Trotter |
|
375 | 61eb1a46 | Guido Trotter | @type instance: L{objects.Instance}
|
376 | 61eb1a46 | Guido Trotter | @param instance: the instance that is being started
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377 | 61eb1a46 | Guido Trotter | @rtype: integer
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378 | 61eb1a46 | Guido Trotter | @return: memory the instance should be started with
|
379 | 61eb1a46 | Guido Trotter |
|
380 | 61eb1a46 | Guido Trotter | """
|
381 | 61eb1a46 | Guido Trotter | free_memory = self.GetNodeInfo()["memory_free"] |
382 | 61eb1a46 | Guido Trotter | max_start_mem = min(instance.beparams[constants.BE_MAXMEM], free_memory)
|
383 | 61eb1a46 | Guido Trotter | start_mem = max(instance.beparams[constants.BE_MINMEM], max_start_mem)
|
384 | 61eb1a46 | Guido Trotter | return start_mem
|
385 | 61eb1a46 | Guido Trotter | |
386 | f48148c3 | Iustin Pop | @classmethod
|
387 | f48148c3 | Iustin Pop | def CheckParameterSyntax(cls, hvparams): |
388 | f48148c3 | Iustin Pop | """Check the given parameters for validity.
|
389 | f48148c3 | Iustin Pop |
|
390 | f48148c3 | Iustin Pop | This should check the passed set of parameters for
|
391 | f48148c3 | Iustin Pop | validity. Classes should extend, not replace, this function.
|
392 | f48148c3 | Iustin Pop |
|
393 | f48148c3 | Iustin Pop | @type hvparams: dict
|
394 | f48148c3 | Iustin Pop | @param hvparams: dictionary with parameter names/value
|
395 | f48148c3 | Iustin Pop | @raise errors.HypervisorError: when a parameter is not valid
|
396 | f48148c3 | Iustin Pop |
|
397 | f48148c3 | Iustin Pop | """
|
398 | f48148c3 | Iustin Pop | for key in hvparams: |
399 | f48148c3 | Iustin Pop | if key not in cls.PARAMETERS: |
400 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' is not supported" % key) |
401 | 205ab586 | Iustin Pop | |
402 | 205ab586 | Iustin Pop | # cheap tests that run on the master, should not access the world
|
403 | 205ab586 | Iustin Pop | for name, (required, check_fn, errstr, _, _) in cls.PARAMETERS.items(): |
404 | 205ab586 | Iustin Pop | if name not in hvparams: |
405 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' is missing" % name) |
406 | 205ab586 | Iustin Pop | value = hvparams[name] |
407 | 205ab586 | Iustin Pop | if not required and not value: |
408 | 205ab586 | Iustin Pop | continue
|
409 | 205ab586 | Iustin Pop | if not value: |
410 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' is required but" |
411 | 205ab586 | Iustin Pop | " is currently not defined" % (name, ))
|
412 | 205ab586 | Iustin Pop | if check_fn is not None and not check_fn(value): |
413 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' fails syntax" |
414 | 205ab586 | Iustin Pop | " check: %s (current value: '%s')" %
|
415 | 205ab586 | Iustin Pop | (name, errstr, value)) |
416 | 205ab586 | Iustin Pop | |
417 | 205ab586 | Iustin Pop | @classmethod
|
418 | 205ab586 | Iustin Pop | def ValidateParameters(cls, hvparams): |
419 | f48148c3 | Iustin Pop | """Check the given parameters for validity.
|
420 | f48148c3 | Iustin Pop |
|
421 | f48148c3 | Iustin Pop | This should check the passed set of parameters for
|
422 | f48148c3 | Iustin Pop | validity. Classes should extend, not replace, this function.
|
423 | f48148c3 | Iustin Pop |
|
424 | f48148c3 | Iustin Pop | @type hvparams: dict
|
425 | f48148c3 | Iustin Pop | @param hvparams: dictionary with parameter names/value
|
426 | f48148c3 | Iustin Pop | @raise errors.HypervisorError: when a parameter is not valid
|
427 | f48148c3 | Iustin Pop |
|
428 | f48148c3 | Iustin Pop | """
|
429 | 205ab586 | Iustin Pop | for name, (required, _, _, check_fn, errstr) in cls.PARAMETERS.items(): |
430 | 205ab586 | Iustin Pop | value = hvparams[name] |
431 | 205ab586 | Iustin Pop | if not required and not value: |
432 | 205ab586 | Iustin Pop | continue
|
433 | 205ab586 | Iustin Pop | if check_fn is not None and not check_fn(value): |
434 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' fails" |
435 | 205ab586 | Iustin Pop | " validation: %s (current value: '%s')" %
|
436 | 205ab586 | Iustin Pop | (name, errstr, value)) |
437 | 572e52bf | Iustin Pop | |
438 | f5118ade | Iustin Pop | @classmethod
|
439 | f5118ade | Iustin Pop | def PowercycleNode(cls): |
440 | f5118ade | Iustin Pop | """Hard powercycle a node using hypervisor specific methods.
|
441 | f5118ade | Iustin Pop |
|
442 | f5118ade | Iustin Pop | This method should hard powercycle the node, using whatever
|
443 | f5118ade | Iustin Pop | methods the hypervisor provides. Note that this means that all
|
444 | f5118ade | Iustin Pop | instances running on the node must be stopped too.
|
445 | f5118ade | Iustin Pop |
|
446 | f5118ade | Iustin Pop | """
|
447 | f5118ade | Iustin Pop | raise NotImplementedError |
448 | f5118ade | Iustin Pop | |
449 | 94fed7da | Iustin Pop | @staticmethod
|
450 | 94fed7da | Iustin Pop | def GetLinuxNodeInfo(): |
451 | 572e52bf | Iustin Pop | """For linux systems, return actual OS information.
|
452 | 572e52bf | Iustin Pop |
|
453 | 572e52bf | Iustin Pop | This is an abstraction for all non-hypervisor-based classes, where
|
454 | 572e52bf | Iustin Pop | the node actually sees all the memory and CPUs via the /proc
|
455 | 572e52bf | Iustin Pop | interface and standard commands. The other case if for example
|
456 | 572e52bf | Iustin Pop | xen, where you only see the hardware resources via xen-specific
|
457 | 572e52bf | Iustin Pop | tools.
|
458 | 572e52bf | Iustin Pop |
|
459 | 572e52bf | Iustin Pop | @return: a dict with the following keys (values in MiB):
|
460 | 572e52bf | Iustin Pop | - memory_total: the total memory size on the node
|
461 | 572e52bf | Iustin Pop | - memory_free: the available memory on the node for instances
|
462 | 572e52bf | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
|
463 | 572e52bf | Iustin Pop |
|
464 | 572e52bf | Iustin Pop | """
|
465 | 572e52bf | Iustin Pop | try:
|
466 | 3374afa9 | Guido Trotter | data = utils.ReadFile("/proc/meminfo").splitlines()
|
467 | 572e52bf | Iustin Pop | except EnvironmentError, err: |
468 | 572e52bf | Iustin Pop | raise errors.HypervisorError("Failed to list node info: %s" % (err,)) |
469 | 572e52bf | Iustin Pop | |
470 | 572e52bf | Iustin Pop | result = {} |
471 | 572e52bf | Iustin Pop | sum_free = 0
|
472 | 572e52bf | Iustin Pop | try:
|
473 | 572e52bf | Iustin Pop | for line in data: |
474 | 572e52bf | Iustin Pop | splitfields = line.split(":", 1) |
475 | 572e52bf | Iustin Pop | |
476 | 572e52bf | Iustin Pop | if len(splitfields) > 1: |
477 | 572e52bf | Iustin Pop | key = splitfields[0].strip()
|
478 | 572e52bf | Iustin Pop | val = splitfields[1].strip()
|
479 | d0c8c01d | Iustin Pop | if key == "MemTotal": |
480 | e687ec01 | Michael Hanselmann | result["memory_total"] = int(val.split()[0]) / 1024 |
481 | d0c8c01d | Iustin Pop | elif key in ("MemFree", "Buffers", "Cached"): |
482 | e687ec01 | Michael Hanselmann | sum_free += int(val.split()[0]) / 1024 |
483 | d0c8c01d | Iustin Pop | elif key == "Active": |
484 | e687ec01 | Michael Hanselmann | result["memory_dom0"] = int(val.split()[0]) / 1024 |
485 | 572e52bf | Iustin Pop | except (ValueError, TypeError), err: |
486 | 572e52bf | Iustin Pop | raise errors.HypervisorError("Failed to compute memory usage: %s" % |
487 | 572e52bf | Iustin Pop | (err,)) |
488 | d0c8c01d | Iustin Pop | result["memory_free"] = sum_free
|
489 | 572e52bf | Iustin Pop | |
490 | 572e52bf | Iustin Pop | cpu_total = 0
|
491 | 572e52bf | Iustin Pop | try:
|
492 | 572e52bf | Iustin Pop | fh = open("/proc/cpuinfo") |
493 | 572e52bf | Iustin Pop | try:
|
494 | 572e52bf | Iustin Pop | cpu_total = len(re.findall("(?m)^processor\s*:\s*[0-9]+\s*$", |
495 | 572e52bf | Iustin Pop | fh.read())) |
496 | 572e52bf | Iustin Pop | finally:
|
497 | 572e52bf | Iustin Pop | fh.close() |
498 | 572e52bf | Iustin Pop | except EnvironmentError, err: |
499 | 572e52bf | Iustin Pop | raise errors.HypervisorError("Failed to list node info: %s" % (err,)) |
500 | d0c8c01d | Iustin Pop | result["cpu_total"] = cpu_total
|
501 | 572e52bf | Iustin Pop | # FIXME: export correct data here
|
502 | d0c8c01d | Iustin Pop | result["cpu_nodes"] = 1 |
503 | d0c8c01d | Iustin Pop | result["cpu_sockets"] = 1 |
504 | 572e52bf | Iustin Pop | |
505 | 572e52bf | Iustin Pop | return result
|
506 | f5118ade | Iustin Pop | |
507 | f5118ade | Iustin Pop | @classmethod
|
508 | f5118ade | Iustin Pop | def LinuxPowercycle(cls): |
509 | f5118ade | Iustin Pop | """Linux-specific powercycle method.
|
510 | f5118ade | Iustin Pop |
|
511 | f5118ade | Iustin Pop | """
|
512 | f5118ade | Iustin Pop | try:
|
513 | f5118ade | Iustin Pop | fd = os.open("/proc/sysrq-trigger", os.O_WRONLY)
|
514 | f5118ade | Iustin Pop | try:
|
515 | f5118ade | Iustin Pop | os.write(fd, "b")
|
516 | f5118ade | Iustin Pop | finally:
|
517 | f5118ade | Iustin Pop | fd.close() |
518 | f5118ade | Iustin Pop | except OSError: |
519 | f5118ade | Iustin Pop | logging.exception("Can't open the sysrq-trigger file")
|
520 | f5118ade | Iustin Pop | result = utils.RunCmd(["reboot", "-n", "-f"]) |
521 | f5118ade | Iustin Pop | if not result: |
522 | f5118ade | Iustin Pop | logging.error("Can't run shutdown: %s", result.output) |