root / lib / hypervisor / hv_base.py @ e695efbf
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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 | 783a6c0b | Iustin Pop | # Copyright (C) 2006, 2007, 2008, 2009, 2010 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 | e3ed5316 | Balazs Lecz | try:
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52 | e3ed5316 | Balazs Lecz | cpu_list = utils.ParseCpuMask(cpu_mask) |
53 | e3ed5316 | Balazs Lecz | except errors.ParseError, _:
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54 | e3ed5316 | Balazs Lecz | return False |
55 | e3ed5316 | Balazs Lecz | return isinstance(cpu_list, list) and len(cpu_list) > 0 |
56 | e3ed5316 | Balazs Lecz | |
57 | e3ed5316 | Balazs Lecz | |
58 | 205ab586 | Iustin Pop | # Read the BaseHypervisor.PARAMETERS docstring for the syntax of the
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59 | 205ab586 | Iustin Pop | # _CHECK values
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60 | 205ab586 | Iustin Pop | |
61 | 205ab586 | Iustin Pop | # must be afile
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62 | 17c61836 | Guido Trotter | _FILE_CHECK = (utils.IsNormAbsPath, "must be an absolute normalized path",
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63 | 205ab586 | Iustin Pop | os.path.isfile, "not found or not a file")
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64 | 205ab586 | Iustin Pop | |
65 | 205ab586 | Iustin Pop | # must be a directory
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66 | 17c61836 | Guido Trotter | _DIR_CHECK = (utils.IsNormAbsPath, "must be an absolute normalized path",
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67 | 205ab586 | Iustin Pop | os.path.isdir, "not found or not a directory")
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68 | 205ab586 | Iustin Pop | |
69 | e3ed5316 | Balazs Lecz | # CPU mask must be well-formed
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70 | e3ed5316 | Balazs Lecz | # TODO: implement node level check for the CPU mask
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71 | e3ed5316 | Balazs Lecz | _CPU_MASK_CHECK = (_IsCpuMaskWellFormed, |
72 | e3ed5316 | Balazs Lecz | "CPU mask definition is not well-formed",
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73 | e3ed5316 | Balazs Lecz | None, None) |
74 | e3ed5316 | Balazs Lecz | |
75 | 205ab586 | Iustin Pop | # nice wrappers for users
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76 | 205ab586 | Iustin Pop | REQ_FILE_CHECK = (True, ) + _FILE_CHECK
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77 | 205ab586 | Iustin Pop | OPT_FILE_CHECK = (False, ) + _FILE_CHECK
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78 | 205ab586 | Iustin Pop | REQ_DIR_CHECK = (True, ) + _DIR_CHECK
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79 | 205ab586 | Iustin Pop | OPT_DIR_CHECK = (False, ) + _DIR_CHECK
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80 | 78411c60 | Iustin Pop | NET_PORT_CHECK = (True, lambda x: x > 0 and x < 65535, "invalid port number", |
81 | 78411c60 | Iustin Pop | None, None) |
82 | e3ed5316 | Balazs Lecz | OPT_CPU_MASK_CHECK = (False, ) + _CPU_MASK_CHECK
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83 | e3ed5316 | Balazs Lecz | REQ_CPU_MASK_CHECK = (True, ) + _CPU_MASK_CHECK
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84 | 205ab586 | Iustin Pop | |
85 | 205ab586 | Iustin Pop | # no checks at all
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86 | 205ab586 | Iustin Pop | NO_CHECK = (False, None, None, None, None) |
87 | 205ab586 | Iustin Pop | |
88 | 205ab586 | Iustin Pop | # required, but no other checks
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89 | 205ab586 | Iustin Pop | REQUIRED_CHECK = (True, None, None, None, None) |
90 | 205ab586 | Iustin Pop | |
91 | e71b9ef4 | Iustin Pop | # migration type
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92 | 783a6c0b | Iustin Pop | MIGRATION_MODE_CHECK = (True, lambda x: x in constants.HT_MIGRATION_MODES, |
93 | 783a6c0b | Iustin Pop | "invalid migration mode", None, None) |
94 | e71b9ef4 | Iustin Pop | |
95 | d73ef63f | Michael Hanselmann | |
96 | 205ab586 | Iustin Pop | def ParamInSet(required, my_set): |
97 | 205ab586 | Iustin Pop | """Builds parameter checker for set membership.
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98 | 205ab586 | Iustin Pop |
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99 | 205ab586 | Iustin Pop | @type required: boolean
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100 | 205ab586 | Iustin Pop | @param required: whether this is a required parameter
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101 | 205ab586 | Iustin Pop | @type my_set: tuple, list or set
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102 | 205ab586 | Iustin Pop | @param my_set: allowed values set
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103 | 205ab586 | Iustin Pop |
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104 | 205ab586 | Iustin Pop | """
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105 | 205ab586 | Iustin Pop | fn = lambda x: x in my_set |
106 | ab3e6da8 | Iustin Pop | err = ("The value must be one of: %s" % utils.CommaJoin(my_set))
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107 | 205ab586 | Iustin Pop | return (required, fn, err, None, None) |
108 | f48148c3 | Iustin Pop | |
109 | f48148c3 | Iustin Pop | |
110 | 65a6f9b7 | Michael Hanselmann | class BaseHypervisor(object): |
111 | 65a6f9b7 | Michael Hanselmann | """Abstract virtualisation technology interface
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112 | 65a6f9b7 | Michael Hanselmann |
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113 | f48148c3 | Iustin Pop | The goal is that all aspects of the virtualisation technology are
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114 | f48148c3 | Iustin Pop | abstracted away from the rest of code.
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115 | 65a6f9b7 | Michael Hanselmann |
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116 | 205ab586 | Iustin Pop | @cvar PARAMETERS: a dict of parameter name: check type; the check type is
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117 | 205ab586 | Iustin Pop | a five-tuple containing:
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118 | 205ab586 | Iustin Pop | - the required flag (boolean)
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119 | 205ab586 | Iustin Pop | - a function to check for syntax, that will be used in
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120 | 205ab586 | Iustin Pop | L{CheckParameterSyntax}, in the master daemon process
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121 | 205ab586 | Iustin Pop | - an error message for the above function
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122 | 205ab586 | Iustin Pop | - a function to check for parameter validity on the remote node,
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123 | 205ab586 | Iustin Pop | in the L{ValidateParameters} function
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124 | 205ab586 | Iustin Pop | - an error message for the above function
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125 | d271c6fd | Iustin Pop | @type CAN_MIGRATE: boolean
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126 | d271c6fd | Iustin Pop | @cvar CAN_MIGRATE: whether this hypervisor can do migration (either
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127 | d271c6fd | Iustin Pop | live or non-live)
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128 | 205ab586 | Iustin Pop |
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129 | 65a6f9b7 | Michael Hanselmann | """
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130 | 205ab586 | Iustin Pop | PARAMETERS = {} |
131 | e1b8653f | Guido Trotter | ANCILLARY_FILES = [] |
132 | d271c6fd | Iustin Pop | CAN_MIGRATE = False
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133 | f48148c3 | Iustin Pop | |
134 | 65a6f9b7 | Michael Hanselmann | def __init__(self): |
135 | 65a6f9b7 | Michael Hanselmann | pass
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136 | 65a6f9b7 | Michael Hanselmann | |
137 | 07813a9e | Iustin Pop | def StartInstance(self, instance, block_devices): |
138 | 65a6f9b7 | Michael Hanselmann | """Start an instance."""
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139 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
140 | 65a6f9b7 | Michael Hanselmann | |
141 | bbcf7ad0 | Iustin Pop | def StopInstance(self, instance, force=False, retry=False, name=None): |
142 | 07b49e41 | Guido Trotter | """Stop an instance
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143 | 07b49e41 | Guido Trotter |
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144 | 07b49e41 | Guido Trotter | @type instance: L{objects.Instance}
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145 | 07b49e41 | Guido Trotter | @param instance: instance to stop
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146 | 07b49e41 | Guido Trotter | @type force: boolean
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147 | 07b49e41 | Guido Trotter | @param force: whether to do a "hard" stop (destroy)
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148 | 07b49e41 | Guido Trotter | @type retry: boolean
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149 | 07b49e41 | Guido Trotter | @param retry: whether this is just a retry call
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150 | bbcf7ad0 | Iustin Pop | @type name: string or None
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151 | bbcf7ad0 | Iustin Pop | @param name: if this parameter is passed, the the instance object
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152 | bbcf7ad0 | Iustin Pop | should not be used (will be passed as None), and the shutdown
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153 | bbcf7ad0 | Iustin Pop | must be done by name only
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154 | 07b49e41 | Guido Trotter |
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155 | 07b49e41 | Guido Trotter | """
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156 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
157 | 65a6f9b7 | Michael Hanselmann | |
158 | f28ec899 | Guido Trotter | def CleanupInstance(self, instance_name): |
159 | f28ec899 | Guido Trotter | """Cleanup after a stopped instance
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160 | f28ec899 | Guido Trotter |
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161 | f28ec899 | Guido Trotter | This is an optional method, used by hypervisors that need to cleanup after
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162 | f28ec899 | Guido Trotter | an instance has been stopped.
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163 | f28ec899 | Guido Trotter |
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164 | f28ec899 | Guido Trotter | @type instance_name: string
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165 | f28ec899 | Guido Trotter | @param instance_name: instance name to cleanup after
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166 | f28ec899 | Guido Trotter |
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167 | f28ec899 | Guido Trotter | """
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168 | f28ec899 | Guido Trotter | pass
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169 | f28ec899 | Guido Trotter | |
170 | 65a6f9b7 | Michael Hanselmann | def RebootInstance(self, instance): |
171 | 65a6f9b7 | Michael Hanselmann | """Reboot an instance."""
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172 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
173 | 65a6f9b7 | Michael Hanselmann | |
174 | 65a6f9b7 | Michael Hanselmann | def ListInstances(self): |
175 | 65a6f9b7 | Michael Hanselmann | """Get the list of running instances."""
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176 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
177 | 65a6f9b7 | Michael Hanselmann | |
178 | 65a6f9b7 | Michael Hanselmann | def GetInstanceInfo(self, instance_name): |
179 | 65a6f9b7 | Michael Hanselmann | """Get instance properties.
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180 | 65a6f9b7 | Michael Hanselmann |
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181 | cd42d0ad | Guido Trotter | @type instance_name: string
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182 | c41eea6e | Iustin Pop | @param instance_name: the instance name
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183 | 65a6f9b7 | Michael Hanselmann |
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184 | c41eea6e | Iustin Pop | @return: tuple (name, id, memory, vcpus, state, times)
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185 | 65a6f9b7 | Michael Hanselmann |
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186 | 65a6f9b7 | Michael Hanselmann | """
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187 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
188 | 65a6f9b7 | Michael Hanselmann | |
189 | 65a6f9b7 | Michael Hanselmann | def GetAllInstancesInfo(self): |
190 | 65a6f9b7 | Michael Hanselmann | """Get properties of all instances.
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191 | 65a6f9b7 | Michael Hanselmann |
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192 | c41eea6e | Iustin Pop | @return: list of tuples (name, id, memory, vcpus, stat, times)
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193 | c41eea6e | Iustin Pop |
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194 | 65a6f9b7 | Michael Hanselmann | """
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195 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
196 | 65a6f9b7 | Michael Hanselmann | |
197 | 65a6f9b7 | Michael Hanselmann | def GetNodeInfo(self): |
198 | 65a6f9b7 | Michael Hanselmann | """Return information about the node.
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199 | 65a6f9b7 | Michael Hanselmann |
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200 | c41eea6e | Iustin Pop | @return: a dict with the following keys (values in MiB):
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201 | c41eea6e | Iustin Pop | - memory_total: the total memory size on the node
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202 | c41eea6e | Iustin Pop | - memory_free: the available memory on the node for instances
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203 | c41eea6e | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
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204 | 65a6f9b7 | Michael Hanselmann |
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205 | 65a6f9b7 | Michael Hanselmann | """
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206 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
207 | 65a6f9b7 | Michael Hanselmann | |
208 | 637ce7f9 | Guido Trotter | @classmethod
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209 | 5431b2e4 | Guido Trotter | def GetShellCommandForConsole(cls, instance, hvparams, beparams): |
210 | 65a6f9b7 | Michael Hanselmann | """Return a command for connecting to the console of an instance.
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211 | 65a6f9b7 | Michael Hanselmann |
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212 | 65a6f9b7 | Michael Hanselmann | """
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213 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
214 | 65a6f9b7 | Michael Hanselmann | |
215 | e1b8653f | Guido Trotter | @classmethod
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216 | e1b8653f | Guido Trotter | def GetAncillaryFiles(cls): |
217 | e1b8653f | Guido Trotter | """Return a list of ancillary files to be copied to all nodes as ancillary
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218 | e1b8653f | Guido Trotter | configuration files.
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219 | e1b8653f | Guido Trotter |
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220 | e1b8653f | Guido Trotter | @rtype: list of strings
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221 | e1b8653f | Guido Trotter | @return: list of absolute paths of files to ship cluster-wide
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222 | e1b8653f | Guido Trotter |
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223 | e1b8653f | Guido Trotter | """
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224 | e1b8653f | Guido Trotter | # By default we return a member variable, so that if an hypervisor has just
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225 | e1b8653f | Guido Trotter | # a static list of files it doesn't have to override this function.
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226 | e1b8653f | Guido Trotter | return cls.ANCILLARY_FILES
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227 | e1b8653f | Guido Trotter | |
228 | 65a6f9b7 | Michael Hanselmann | def Verify(self): |
229 | 65a6f9b7 | Michael Hanselmann | """Verify the hypervisor.
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230 | 65a6f9b7 | Michael Hanselmann |
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231 | 65a6f9b7 | Michael Hanselmann | """
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232 | 65a6f9b7 | Michael Hanselmann | raise NotImplementedError |
233 | 6e7275c0 | Iustin Pop | |
234 | 7260cfbe | Iustin Pop | def MigrationInfo(self, instance): # pylint: disable-msg=R0201,W0613 |
235 | cd42d0ad | Guido Trotter | """Get instance information to perform a migration.
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236 | cd42d0ad | Guido Trotter |
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237 | cd42d0ad | Guido Trotter | By default assume no information is needed.
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238 | cd42d0ad | Guido Trotter |
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239 | cd42d0ad | Guido Trotter | @type instance: L{objects.Instance}
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240 | cd42d0ad | Guido Trotter | @param instance: instance to be migrated
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241 | cd42d0ad | Guido Trotter | @rtype: string/data (opaque)
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242 | cd42d0ad | Guido Trotter | @return: instance migration information - serialized form
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243 | cd42d0ad | Guido Trotter |
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244 | cd42d0ad | Guido Trotter | """
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245 | cd42d0ad | Guido Trotter | return '' |
246 | cd42d0ad | Guido Trotter | |
247 | cd42d0ad | Guido Trotter | def AcceptInstance(self, instance, info, target): |
248 | cd42d0ad | Guido Trotter | """Prepare to accept an instance.
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249 | cd42d0ad | Guido Trotter |
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250 | cd42d0ad | Guido Trotter | By default assume no preparation is needed.
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251 | cd42d0ad | Guido Trotter |
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252 | cd42d0ad | Guido Trotter | @type instance: L{objects.Instance}
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253 | cd42d0ad | Guido Trotter | @param instance: instance to be accepted
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254 | cd42d0ad | Guido Trotter | @type info: string/data (opaque)
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255 | cd42d0ad | Guido Trotter | @param info: migration information, from the source node
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256 | cd42d0ad | Guido Trotter | @type target: string
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257 | cd42d0ad | Guido Trotter | @param target: target host (usually ip), on this node
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258 | cd42d0ad | Guido Trotter |
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259 | cd42d0ad | Guido Trotter | """
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260 | cd42d0ad | Guido Trotter | pass
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261 | cd42d0ad | Guido Trotter | |
262 | cd42d0ad | Guido Trotter | def FinalizeMigration(self, instance, info, success): |
263 | cd42d0ad | Guido Trotter | """Finalized an instance migration.
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264 | cd42d0ad | Guido Trotter |
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265 | cd42d0ad | Guido Trotter | Should finalize or revert any preparation done to accept the instance.
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266 | cd42d0ad | Guido Trotter | Since by default we do no preparation, we also don't have anything to do
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267 | cd42d0ad | Guido Trotter |
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268 | cd42d0ad | Guido Trotter | @type instance: L{objects.Instance}
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269 | fea922fa | Guido Trotter | @param instance: instance whose migration is being finalized
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270 | cd42d0ad | Guido Trotter | @type info: string/data (opaque)
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271 | cd42d0ad | Guido Trotter | @param info: migration information, from the source node
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272 | cd42d0ad | Guido Trotter | @type success: boolean
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273 | cd42d0ad | Guido Trotter | @param success: whether the migration was a success or a failure
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274 | cd42d0ad | Guido Trotter |
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275 | cd42d0ad | Guido Trotter | """
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276 | cd42d0ad | Guido Trotter | pass
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277 | cd42d0ad | Guido Trotter | |
278 | 58d38b02 | Iustin Pop | def MigrateInstance(self, instance, target, live): |
279 | 6e7275c0 | Iustin Pop | """Migrate an instance.
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280 | 6e7275c0 | Iustin Pop |
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281 | 3a488770 | Iustin Pop | @type instance: L{objects.Instance}
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282 | 9044275a | Michael Hanselmann | @param instance: the instance to be migrated
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283 | cd42d0ad | Guido Trotter | @type target: string
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284 | cd42d0ad | Guido Trotter | @param target: hostname (usually ip) of the target node
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285 | cd42d0ad | Guido Trotter | @type live: boolean
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286 | cd42d0ad | Guido Trotter | @param live: whether to do a live or non-live migration
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287 | 6e7275c0 | Iustin Pop |
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288 | 6e7275c0 | Iustin Pop | """
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289 | 6e7275c0 | Iustin Pop | raise NotImplementedError |
290 | f48148c3 | Iustin Pop | |
291 | f48148c3 | Iustin Pop | @classmethod
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292 | f48148c3 | Iustin Pop | def CheckParameterSyntax(cls, hvparams): |
293 | f48148c3 | Iustin Pop | """Check the given parameters for validity.
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294 | f48148c3 | Iustin Pop |
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295 | f48148c3 | Iustin Pop | This should check the passed set of parameters for
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296 | f48148c3 | Iustin Pop | validity. Classes should extend, not replace, this function.
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297 | f48148c3 | Iustin Pop |
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298 | f48148c3 | Iustin Pop | @type hvparams: dict
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299 | f48148c3 | Iustin Pop | @param hvparams: dictionary with parameter names/value
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300 | f48148c3 | Iustin Pop | @raise errors.HypervisorError: when a parameter is not valid
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301 | f48148c3 | Iustin Pop |
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302 | f48148c3 | Iustin Pop | """
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303 | f48148c3 | Iustin Pop | for key in hvparams: |
304 | f48148c3 | Iustin Pop | if key not in cls.PARAMETERS: |
305 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' is not supported" % key) |
306 | 205ab586 | Iustin Pop | |
307 | 205ab586 | Iustin Pop | # cheap tests that run on the master, should not access the world
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308 | 205ab586 | Iustin Pop | for name, (required, check_fn, errstr, _, _) in cls.PARAMETERS.items(): |
309 | 205ab586 | Iustin Pop | if name not in hvparams: |
310 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' is missing" % name) |
311 | 205ab586 | Iustin Pop | value = hvparams[name] |
312 | 205ab586 | Iustin Pop | if not required and not value: |
313 | 205ab586 | Iustin Pop | continue
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314 | 205ab586 | Iustin Pop | if not value: |
315 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' is required but" |
316 | 205ab586 | Iustin Pop | " is currently not defined" % (name, ))
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317 | 205ab586 | Iustin Pop | if check_fn is not None and not check_fn(value): |
318 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' fails syntax" |
319 | 205ab586 | Iustin Pop | " check: %s (current value: '%s')" %
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320 | 205ab586 | Iustin Pop | (name, errstr, value)) |
321 | 205ab586 | Iustin Pop | |
322 | 205ab586 | Iustin Pop | @classmethod
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323 | 205ab586 | Iustin Pop | def ValidateParameters(cls, hvparams): |
324 | f48148c3 | Iustin Pop | """Check the given parameters for validity.
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325 | f48148c3 | Iustin Pop |
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326 | f48148c3 | Iustin Pop | This should check the passed set of parameters for
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327 | f48148c3 | Iustin Pop | validity. Classes should extend, not replace, this function.
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328 | f48148c3 | Iustin Pop |
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329 | f48148c3 | Iustin Pop | @type hvparams: dict
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330 | f48148c3 | Iustin Pop | @param hvparams: dictionary with parameter names/value
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331 | f48148c3 | Iustin Pop | @raise errors.HypervisorError: when a parameter is not valid
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332 | f48148c3 | Iustin Pop |
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333 | f48148c3 | Iustin Pop | """
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334 | 205ab586 | Iustin Pop | for name, (required, _, _, check_fn, errstr) in cls.PARAMETERS.items(): |
335 | 205ab586 | Iustin Pop | value = hvparams[name] |
336 | 205ab586 | Iustin Pop | if not required and not value: |
337 | 205ab586 | Iustin Pop | continue
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338 | 205ab586 | Iustin Pop | if check_fn is not None and not check_fn(value): |
339 | 205ab586 | Iustin Pop | raise errors.HypervisorError("Parameter '%s' fails" |
340 | 205ab586 | Iustin Pop | " validation: %s (current value: '%s')" %
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341 | 205ab586 | Iustin Pop | (name, errstr, value)) |
342 | 572e52bf | Iustin Pop | |
343 | f5118ade | Iustin Pop | @classmethod
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344 | f5118ade | Iustin Pop | def PowercycleNode(cls): |
345 | f5118ade | Iustin Pop | """Hard powercycle a node using hypervisor specific methods.
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346 | f5118ade | Iustin Pop |
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347 | f5118ade | Iustin Pop | This method should hard powercycle the node, using whatever
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348 | f5118ade | Iustin Pop | methods the hypervisor provides. Note that this means that all
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349 | f5118ade | Iustin Pop | instances running on the node must be stopped too.
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350 | f5118ade | Iustin Pop |
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351 | f5118ade | Iustin Pop | """
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352 | f5118ade | Iustin Pop | raise NotImplementedError |
353 | f5118ade | Iustin Pop | |
354 | 94fed7da | Iustin Pop | @staticmethod
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355 | 94fed7da | Iustin Pop | def GetLinuxNodeInfo(): |
356 | 572e52bf | Iustin Pop | """For linux systems, return actual OS information.
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357 | 572e52bf | Iustin Pop |
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358 | 572e52bf | Iustin Pop | This is an abstraction for all non-hypervisor-based classes, where
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359 | 572e52bf | Iustin Pop | the node actually sees all the memory and CPUs via the /proc
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360 | 572e52bf | Iustin Pop | interface and standard commands. The other case if for example
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361 | 572e52bf | Iustin Pop | xen, where you only see the hardware resources via xen-specific
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362 | 572e52bf | Iustin Pop | tools.
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363 | 572e52bf | Iustin Pop |
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364 | 572e52bf | Iustin Pop | @return: a dict with the following keys (values in MiB):
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365 | 572e52bf | Iustin Pop | - memory_total: the total memory size on the node
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366 | 572e52bf | Iustin Pop | - memory_free: the available memory on the node for instances
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367 | 572e52bf | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
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368 | 572e52bf | Iustin Pop |
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369 | 572e52bf | Iustin Pop | """
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370 | 572e52bf | Iustin Pop | try:
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371 | 3374afa9 | Guido Trotter | data = utils.ReadFile("/proc/meminfo").splitlines()
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372 | 572e52bf | Iustin Pop | except EnvironmentError, err: |
373 | 572e52bf | Iustin Pop | raise errors.HypervisorError("Failed to list node info: %s" % (err,)) |
374 | 572e52bf | Iustin Pop | |
375 | 572e52bf | Iustin Pop | result = {} |
376 | 572e52bf | Iustin Pop | sum_free = 0
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377 | 572e52bf | Iustin Pop | try:
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378 | 572e52bf | Iustin Pop | for line in data: |
379 | 572e52bf | Iustin Pop | splitfields = line.split(":", 1) |
380 | 572e52bf | Iustin Pop | |
381 | 572e52bf | Iustin Pop | if len(splitfields) > 1: |
382 | 572e52bf | Iustin Pop | key = splitfields[0].strip()
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383 | 572e52bf | Iustin Pop | val = splitfields[1].strip()
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384 | 572e52bf | Iustin Pop | if key == 'MemTotal': |
385 | 572e52bf | Iustin Pop | result['memory_total'] = int(val.split()[0])/1024 |
386 | 572e52bf | Iustin Pop | elif key in ('MemFree', 'Buffers', 'Cached'): |
387 | 572e52bf | Iustin Pop | sum_free += int(val.split()[0])/1024 |
388 | 572e52bf | Iustin Pop | elif key == 'Active': |
389 | 572e52bf | Iustin Pop | result['memory_dom0'] = int(val.split()[0])/1024 |
390 | 572e52bf | Iustin Pop | except (ValueError, TypeError), err: |
391 | 572e52bf | Iustin Pop | raise errors.HypervisorError("Failed to compute memory usage: %s" % |
392 | 572e52bf | Iustin Pop | (err,)) |
393 | 572e52bf | Iustin Pop | result['memory_free'] = sum_free
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394 | 572e52bf | Iustin Pop | |
395 | 572e52bf | Iustin Pop | cpu_total = 0
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396 | 572e52bf | Iustin Pop | try:
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397 | 572e52bf | Iustin Pop | fh = open("/proc/cpuinfo") |
398 | 572e52bf | Iustin Pop | try:
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399 | 572e52bf | Iustin Pop | cpu_total = len(re.findall("(?m)^processor\s*:\s*[0-9]+\s*$", |
400 | 572e52bf | Iustin Pop | fh.read())) |
401 | 572e52bf | Iustin Pop | finally:
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402 | 572e52bf | Iustin Pop | fh.close() |
403 | 572e52bf | Iustin Pop | except EnvironmentError, err: |
404 | 572e52bf | Iustin Pop | raise errors.HypervisorError("Failed to list node info: %s" % (err,)) |
405 | 572e52bf | Iustin Pop | result['cpu_total'] = cpu_total
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406 | 572e52bf | Iustin Pop | # FIXME: export correct data here
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407 | 572e52bf | Iustin Pop | result['cpu_nodes'] = 1 |
408 | 572e52bf | Iustin Pop | result['cpu_sockets'] = 1 |
409 | 572e52bf | Iustin Pop | |
410 | 572e52bf | Iustin Pop | return result
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411 | f5118ade | Iustin Pop | |
412 | f5118ade | Iustin Pop | @classmethod
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413 | f5118ade | Iustin Pop | def LinuxPowercycle(cls): |
414 | f5118ade | Iustin Pop | """Linux-specific powercycle method.
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415 | f5118ade | Iustin Pop |
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416 | f5118ade | Iustin Pop | """
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417 | f5118ade | Iustin Pop | try:
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418 | f5118ade | Iustin Pop | fd = os.open("/proc/sysrq-trigger", os.O_WRONLY)
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419 | f5118ade | Iustin Pop | try:
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420 | f5118ade | Iustin Pop | os.write(fd, "b")
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421 | f5118ade | Iustin Pop | finally:
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422 | f5118ade | Iustin Pop | fd.close() |
423 | f5118ade | Iustin Pop | except OSError: |
424 | f5118ade | Iustin Pop | logging.exception("Can't open the sysrq-trigger file")
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425 | f5118ade | Iustin Pop | result = utils.RunCmd(["reboot", "-n", "-f"]) |
426 | f5118ade | Iustin Pop | if not result: |
427 | f5118ade | Iustin Pop | logging.error("Can't run shutdown: %s", result.output) |