root / lib / hypervisor / hv_fake.py @ 861610e9
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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 | 65a6f9b7 | Michael Hanselmann | # Copyright (C) 2006, 2007, 2008 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 | """Fake hypervisor
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23 | 65a6f9b7 | Michael Hanselmann |
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24 | 65a6f9b7 | Michael Hanselmann | """
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25 | 65a6f9b7 | Michael Hanselmann | |
26 | 65a6f9b7 | Michael Hanselmann | import os |
27 | 65a6f9b7 | Michael Hanselmann | import os.path |
28 | 94fed7da | Iustin Pop | import logging |
29 | 65a6f9b7 | Michael Hanselmann | |
30 | 65a6f9b7 | Michael Hanselmann | from ganeti import utils |
31 | 65a6f9b7 | Michael Hanselmann | from ganeti import constants |
32 | 65a6f9b7 | Michael Hanselmann | from ganeti import errors |
33 | 55cc0a44 | Michael Hanselmann | from ganeti import objects |
34 | a2d32034 | Michael Hanselmann | from ganeti.hypervisor import hv_base |
35 | 65a6f9b7 | Michael Hanselmann | |
36 | 65a6f9b7 | Michael Hanselmann | |
37 | a2d32034 | Michael Hanselmann | class FakeHypervisor(hv_base.BaseHypervisor): |
38 | 65a6f9b7 | Michael Hanselmann | """Fake hypervisor interface.
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39 | 65a6f9b7 | Michael Hanselmann |
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40 | 65a6f9b7 | Michael Hanselmann | This can be used for testing the ganeti code without having to have
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41 | 65a6f9b7 | Michael Hanselmann | a real virtualisation software installed.
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42 | 65a6f9b7 | Michael Hanselmann |
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43 | 65a6f9b7 | Michael Hanselmann | """
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44 | d271c6fd | Iustin Pop | CAN_MIGRATE = True
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45 | d271c6fd | Iustin Pop | |
46 | 6df291d4 | Iustin Pop | _ROOT_DIR = constants.RUN_GANETI_DIR + "/fake-hypervisor"
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47 | 65a6f9b7 | Michael Hanselmann | |
48 | 65a6f9b7 | Michael Hanselmann | def __init__(self): |
49 | a2d32034 | Michael Hanselmann | hv_base.BaseHypervisor.__init__(self)
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50 | 98c98ab9 | Guido Trotter | utils.EnsureDirs([(self._ROOT_DIR, constants.RUN_DIRS_MODE)])
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51 | 65a6f9b7 | Michael Hanselmann | |
52 | 65a6f9b7 | Michael Hanselmann | def ListInstances(self): |
53 | 65a6f9b7 | Michael Hanselmann | """Get the list of running instances.
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54 | 65a6f9b7 | Michael Hanselmann |
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55 | 65a6f9b7 | Michael Hanselmann | """
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56 | 65a6f9b7 | Michael Hanselmann | return os.listdir(self._ROOT_DIR) |
57 | 65a6f9b7 | Michael Hanselmann | |
58 | 65a6f9b7 | Michael Hanselmann | def GetInstanceInfo(self, instance_name): |
59 | 65a6f9b7 | Michael Hanselmann | """Get instance properties.
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60 | 65a6f9b7 | Michael Hanselmann |
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61 | c41eea6e | Iustin Pop | @param instance_name: the instance name
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62 | c41eea6e | Iustin Pop |
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63 | c41eea6e | Iustin Pop | @return: tuple of (name, id, memory, vcpus, stat, times)
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64 | 65a6f9b7 | Michael Hanselmann |
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65 | 65a6f9b7 | Michael Hanselmann | """
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66 | 3b80eb2c | Iustin Pop | file_name = self._InstanceFile(instance_name)
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67 | 65a6f9b7 | Michael Hanselmann | if not os.path.exists(file_name): |
68 | 65a6f9b7 | Michael Hanselmann | return None |
69 | 65a6f9b7 | Michael Hanselmann | try:
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70 | bfc30ec0 | Iustin Pop | fh = open(file_name, "r") |
71 | 65a6f9b7 | Michael Hanselmann | try:
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72 | 65a6f9b7 | Michael Hanselmann | inst_id = fh.readline().strip() |
73 | bfc30ec0 | Iustin Pop | memory = utils.TryConvert(int, fh.readline().strip())
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74 | 4c4b5058 | Iustin Pop | vcpus = utils.TryConvert(int, fh.readline().strip())
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75 | 65a6f9b7 | Michael Hanselmann | stat = "---b-"
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76 | 65a6f9b7 | Michael Hanselmann | times = "0"
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77 | 65a6f9b7 | Michael Hanselmann | return (instance_name, inst_id, memory, vcpus, stat, times)
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78 | 65a6f9b7 | Michael Hanselmann | finally:
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79 | 65a6f9b7 | Michael Hanselmann | fh.close() |
80 | 65a6f9b7 | Michael Hanselmann | except IOError, err: |
81 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to list instance %s: %s" % |
82 | 65a6f9b7 | Michael Hanselmann | (instance_name, err)) |
83 | 65a6f9b7 | Michael Hanselmann | |
84 | 65a6f9b7 | Michael Hanselmann | def GetAllInstancesInfo(self): |
85 | 65a6f9b7 | Michael Hanselmann | """Get properties of all instances.
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86 | 65a6f9b7 | Michael Hanselmann |
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87 | c41eea6e | Iustin Pop | @return: list of tuples (name, id, memory, vcpus, stat, times)
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88 | c41eea6e | Iustin Pop |
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89 | 65a6f9b7 | Michael Hanselmann | """
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90 | 65a6f9b7 | Michael Hanselmann | data = [] |
91 | 65a6f9b7 | Michael Hanselmann | for file_name in os.listdir(self._ROOT_DIR): |
92 | 65a6f9b7 | Michael Hanselmann | try:
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93 | 3b80eb2c | Iustin Pop | fh = open(utils.PathJoin(self._ROOT_DIR, file_name), "r") |
94 | 65a6f9b7 | Michael Hanselmann | inst_id = "-1"
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95 | bfc30ec0 | Iustin Pop | memory = 0
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96 | bfc30ec0 | Iustin Pop | vcpus = 1
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97 | 65a6f9b7 | Michael Hanselmann | stat = "-----"
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98 | 65a6f9b7 | Michael Hanselmann | times = "-1"
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99 | 65a6f9b7 | Michael Hanselmann | try:
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100 | 65a6f9b7 | Michael Hanselmann | inst_id = fh.readline().strip() |
101 | bfc30ec0 | Iustin Pop | memory = utils.TryConvert(int, fh.readline().strip())
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102 | bfc30ec0 | Iustin Pop | vcpus = utils.TryConvert(int, fh.readline().strip())
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103 | 65a6f9b7 | Michael Hanselmann | stat = "---b-"
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104 | 65a6f9b7 | Michael Hanselmann | times = "0"
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105 | 65a6f9b7 | Michael Hanselmann | finally:
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106 | 65a6f9b7 | Michael Hanselmann | fh.close() |
107 | 65a6f9b7 | Michael Hanselmann | data.append((file_name, inst_id, memory, vcpus, stat, times)) |
108 | 65a6f9b7 | Michael Hanselmann | except IOError, err: |
109 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to list instances: %s" % err) |
110 | 65a6f9b7 | Michael Hanselmann | return data
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111 | 65a6f9b7 | Michael Hanselmann | |
112 | 3b80eb2c | Iustin Pop | @classmethod
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113 | 3b80eb2c | Iustin Pop | def _InstanceFile(cls, instance_name): |
114 | 94fed7da | Iustin Pop | """Compute the instance file for an instance name.
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115 | 94fed7da | Iustin Pop |
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116 | 94fed7da | Iustin Pop | """
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117 | 3b80eb2c | Iustin Pop | return utils.PathJoin(cls._ROOT_DIR, instance_name)
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118 | 94fed7da | Iustin Pop | |
119 | 94fed7da | Iustin Pop | def _IsAlive(self, instance_name): |
120 | 94fed7da | Iustin Pop | """Checks if an instance is alive.
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121 | 94fed7da | Iustin Pop |
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122 | 94fed7da | Iustin Pop | """
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123 | 94fed7da | Iustin Pop | file_name = self._InstanceFile(instance_name)
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124 | 94fed7da | Iustin Pop | return os.path.exists(file_name)
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125 | 94fed7da | Iustin Pop | |
126 | 94fed7da | Iustin Pop | def _MarkUp(self, instance): |
127 | 94fed7da | Iustin Pop | """Mark the instance as running.
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128 | 94fed7da | Iustin Pop |
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129 | 94fed7da | Iustin Pop | This does no checks, which should be done by its callers.
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130 | 94fed7da | Iustin Pop |
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131 | 94fed7da | Iustin Pop | """
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132 | 94fed7da | Iustin Pop | file_name = self._InstanceFile(instance.name)
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133 | 94fed7da | Iustin Pop | fh = file(file_name, "w") |
134 | 94fed7da | Iustin Pop | try:
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135 | 94fed7da | Iustin Pop | fh.write("0\n%d\n%d\n" %
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136 | f5a4b9ce | Guido Trotter | (instance.beparams[constants.BE_MAXMEM], |
137 | 94fed7da | Iustin Pop | instance.beparams[constants.BE_VCPUS])) |
138 | 94fed7da | Iustin Pop | finally:
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139 | 94fed7da | Iustin Pop | fh.close() |
140 | 94fed7da | Iustin Pop | |
141 | bbcf7ad0 | Iustin Pop | def _MarkDown(self, instance_name): |
142 | 94fed7da | Iustin Pop | """Mark the instance as running.
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143 | 94fed7da | Iustin Pop |
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144 | 94fed7da | Iustin Pop | This does no checks, which should be done by its callers.
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145 | 94fed7da | Iustin Pop |
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146 | 94fed7da | Iustin Pop | """
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147 | bbcf7ad0 | Iustin Pop | file_name = self._InstanceFile(instance_name)
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148 | 94fed7da | Iustin Pop | utils.RemoveFile(file_name) |
149 | 94fed7da | Iustin Pop | |
150 | 323f9095 | Stephen Shirley | def StartInstance(self, instance, block_devices, startup_paused): |
151 | 65a6f9b7 | Michael Hanselmann | """Start an instance.
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152 | 65a6f9b7 | Michael Hanselmann |
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153 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, it just creates a file in the base dir,
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154 | 65a6f9b7 | Michael Hanselmann | creating an exception if it already exists. We don't actually
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155 | 65a6f9b7 | Michael Hanselmann | handle race conditions properly, since these are *FAKE* instances.
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156 | 65a6f9b7 | Michael Hanselmann |
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157 | 65a6f9b7 | Michael Hanselmann | """
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158 | 94fed7da | Iustin Pop | if self._IsAlive(instance.name): |
159 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to start instance %s: %s" % |
160 | 65a6f9b7 | Michael Hanselmann | (instance.name, "already running"))
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161 | 65a6f9b7 | Michael Hanselmann | try:
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162 | 94fed7da | Iustin Pop | self._MarkUp(instance)
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163 | 65a6f9b7 | Michael Hanselmann | except IOError, err: |
164 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to start instance %s: %s" % |
165 | 65a6f9b7 | Michael Hanselmann | (instance.name, err)) |
166 | 65a6f9b7 | Michael Hanselmann | |
167 | bbcf7ad0 | Iustin Pop | def StopInstance(self, instance, force=False, retry=False, name=None): |
168 | 65a6f9b7 | Michael Hanselmann | """Stop an instance.
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169 | 65a6f9b7 | Michael Hanselmann |
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170 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, this just removes the file in the base
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171 | 65a6f9b7 | Michael Hanselmann | dir, if it exist, otherwise we raise an exception.
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172 | 65a6f9b7 | Michael Hanselmann |
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173 | 65a6f9b7 | Michael Hanselmann | """
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174 | bbcf7ad0 | Iustin Pop | if name is None: |
175 | bbcf7ad0 | Iustin Pop | name = instance.name |
176 | bbcf7ad0 | Iustin Pop | if not self._IsAlive(name): |
177 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to stop instance %s: %s" % |
178 | bbcf7ad0 | Iustin Pop | (name, "not running"))
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179 | bbcf7ad0 | Iustin Pop | self._MarkDown(name)
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180 | 65a6f9b7 | Michael Hanselmann | |
181 | 65a6f9b7 | Michael Hanselmann | def RebootInstance(self, instance): |
182 | 65a6f9b7 | Michael Hanselmann | """Reboot an instance.
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183 | 65a6f9b7 | Michael Hanselmann |
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184 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, this does nothing.
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185 | 65a6f9b7 | Michael Hanselmann |
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186 | 65a6f9b7 | Michael Hanselmann | """
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187 | 65a6f9b7 | Michael Hanselmann | return
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188 | 65a6f9b7 | Michael Hanselmann | |
189 | 65a6f9b7 | Michael Hanselmann | def GetNodeInfo(self): |
190 | 65a6f9b7 | Michael Hanselmann | """Return information about the node.
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191 | 65a6f9b7 | Michael Hanselmann |
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192 | 572e52bf | Iustin Pop | This is just a wrapper over the base GetLinuxNodeInfo method.
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193 | 572e52bf | Iustin Pop |
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194 | c41eea6e | Iustin Pop | @return: a dict with the following keys (values in MiB):
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195 | c41eea6e | Iustin Pop | - memory_total: the total memory size on the node
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196 | c41eea6e | Iustin Pop | - memory_free: the available memory on the node for instances
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197 | c41eea6e | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
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198 | 65a6f9b7 | Michael Hanselmann |
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199 | 65a6f9b7 | Michael Hanselmann | """
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200 | 572e52bf | Iustin Pop | result = self.GetLinuxNodeInfo()
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201 | bfc30ec0 | Iustin Pop | # substract running instances
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202 | bfc30ec0 | Iustin Pop | all_instances = self.GetAllInstancesInfo()
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203 | d0c8c01d | Iustin Pop | result["memory_free"] -= min(result["memory_free"], |
204 | bfc30ec0 | Iustin Pop | sum([row[2] for row in all_instances])) |
205 | 65a6f9b7 | Michael Hanselmann | return result
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206 | 65a6f9b7 | Michael Hanselmann | |
207 | 637ce7f9 | Guido Trotter | @classmethod
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208 | 55cc0a44 | Michael Hanselmann | def GetInstanceConsole(cls, instance, hvparams, beparams): |
209 | 55cc0a44 | Michael Hanselmann | """Return information for connecting to the console of an instance.
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210 | 65a6f9b7 | Michael Hanselmann |
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211 | 65a6f9b7 | Michael Hanselmann | """
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212 | 55cc0a44 | Michael Hanselmann | return objects.InstanceConsole(instance=instance.name,
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213 | 55cc0a44 | Michael Hanselmann | kind=constants.CONS_MESSAGE, |
214 | 55cc0a44 | Michael Hanselmann | message=("Console not available for fake"
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215 | 55cc0a44 | Michael Hanselmann | " hypervisor"))
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216 | 65a6f9b7 | Michael Hanselmann | |
217 | 65a6f9b7 | Michael Hanselmann | def Verify(self): |
218 | 65a6f9b7 | Michael Hanselmann | """Verify the hypervisor.
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219 | 65a6f9b7 | Michael Hanselmann |
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220 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, it just checks the existence of the base
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221 | 65a6f9b7 | Michael Hanselmann | dir.
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222 | 65a6f9b7 | Michael Hanselmann |
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223 | 65a6f9b7 | Michael Hanselmann | """
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224 | 65a6f9b7 | Michael Hanselmann | if not os.path.exists(self._ROOT_DIR): |
225 | 65a6f9b7 | Michael Hanselmann | return "The required directory '%s' does not exist." % self._ROOT_DIR |
226 | f5118ade | Iustin Pop | |
227 | f5118ade | Iustin Pop | @classmethod
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228 | f5118ade | Iustin Pop | def PowercycleNode(cls): |
229 | f5118ade | Iustin Pop | """Fake hypervisor powercycle, just a wrapper over Linux powercycle.
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230 | f5118ade | Iustin Pop |
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231 | f5118ade | Iustin Pop | """
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232 | f5118ade | Iustin Pop | cls.LinuxPowercycle() |
233 | 94fed7da | Iustin Pop | |
234 | 94fed7da | Iustin Pop | def AcceptInstance(self, instance, info, target): |
235 | 94fed7da | Iustin Pop | """Prepare to accept an instance.
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236 | 94fed7da | Iustin Pop |
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237 | 94fed7da | Iustin Pop | @type instance: L{objects.Instance}
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238 | 94fed7da | Iustin Pop | @param instance: instance to be accepted
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239 | 94fed7da | Iustin Pop | @type info: string
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240 | 94fed7da | Iustin Pop | @param info: instance info, not used
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241 | 94fed7da | Iustin Pop | @type target: string
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242 | 94fed7da | Iustin Pop | @param target: target host (usually ip), on this node
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243 | 94fed7da | Iustin Pop |
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244 | 94fed7da | Iustin Pop | """
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245 | 94fed7da | Iustin Pop | if self._IsAlive(instance.name): |
246 | 94fed7da | Iustin Pop | raise errors.HypervisorError("Can't accept instance, already running") |
247 | 94fed7da | Iustin Pop | |
248 | 94fed7da | Iustin Pop | def MigrateInstance(self, instance, target, live): |
249 | 94fed7da | Iustin Pop | """Migrate an instance.
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250 | 94fed7da | Iustin Pop |
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251 | 3a488770 | Iustin Pop | @type instance: L{objects.Instance}
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252 | 94fed7da | Iustin Pop | @param instance: the instance to be migrated
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253 | 94fed7da | Iustin Pop | @type target: string
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254 | 94fed7da | Iustin Pop | @param target: hostname (usually ip) of the target node
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255 | 94fed7da | Iustin Pop | @type live: boolean
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256 | 94fed7da | Iustin Pop | @param live: whether to do a live or non-live migration
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257 | 94fed7da | Iustin Pop |
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258 | 94fed7da | Iustin Pop | """
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259 | 94fed7da | Iustin Pop | logging.debug("Fake hypervisor migrating %s to %s (live=%s)",
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260 | 94fed7da | Iustin Pop | instance, target, live) |
261 | 94fed7da | Iustin Pop | |
262 | 60af751d | Andrea Spadaccini | def FinalizeMigrationDst(self, instance, info, success): |
263 | 60af751d | Andrea Spadaccini | """Finalize the instance migration on the target node.
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264 | 94fed7da | Iustin Pop |
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265 | 94fed7da | Iustin Pop | For the fake hv, this just marks the instance up.
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266 | 94fed7da | Iustin Pop |
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267 | 94fed7da | Iustin Pop | @type instance: L{objects.Instance}
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268 | 94fed7da | Iustin Pop | @param instance: instance whose migration is being finalized
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269 | 60af751d | Andrea Spadaccini | @type info: string/data (opaque)
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270 | 60af751d | Andrea Spadaccini | @param info: migration information, from the source node
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271 | 60af751d | Andrea Spadaccini | @type success: boolean
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272 | 60af751d | Andrea Spadaccini | @param success: whether the migration was a success or a failure
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273 | 94fed7da | Iustin Pop |
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274 | 94fed7da | Iustin Pop | """
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275 | 94fed7da | Iustin Pop | if success:
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276 | 94fed7da | Iustin Pop | self._MarkUp(instance)
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277 | 94fed7da | Iustin Pop | else:
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278 | 94fed7da | Iustin Pop | # ensure it's down
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279 | bbcf7ad0 | Iustin Pop | self._MarkDown(instance.name)
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280 | 60af751d | Andrea Spadaccini | |
281 | 60af751d | Andrea Spadaccini | def PostMigrationCleanup(self, instance): |
282 | 60af751d | Andrea Spadaccini | """Clean-up after a migration.
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283 | 60af751d | Andrea Spadaccini |
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284 | 60af751d | Andrea Spadaccini | To be executed on the source node.
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285 | 60af751d | Andrea Spadaccini |
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286 | 60af751d | Andrea Spadaccini | @type instance: L{objects.Instance}
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287 | 60af751d | Andrea Spadaccini | @param instance: the instance that was migrated
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288 | 60af751d | Andrea Spadaccini |
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289 | 60af751d | Andrea Spadaccini | """
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290 | 60af751d | Andrea Spadaccini | pass
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291 | 60af751d | Andrea Spadaccini | |
292 | 60af751d | Andrea Spadaccini | def FinalizeMigrationSource(self, instance, success, live): |
293 | 60af751d | Andrea Spadaccini | """Finalize the instance migration on the source node.
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294 | 60af751d | Andrea Spadaccini |
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295 | 60af751d | Andrea Spadaccini | @type instance: L{objects.Instance}
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296 | 60af751d | Andrea Spadaccini | @param instance: the instance that was migrated
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297 | 60af751d | Andrea Spadaccini | @type success: bool
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298 | 60af751d | Andrea Spadaccini | @param success: whether the migration succeeded or not
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299 | 60af751d | Andrea Spadaccini | @type live: bool
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300 | 60af751d | Andrea Spadaccini | @param live: whether the user requested a live migration or not
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301 | 60af751d | Andrea Spadaccini |
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302 | 60af751d | Andrea Spadaccini | """
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303 | 60af751d | Andrea Spadaccini | # pylint: disable=W0613
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304 | 60af751d | Andrea Spadaccini | if success:
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305 | 60af751d | Andrea Spadaccini | self._MarkDown(instance.name)
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306 | 60af751d | Andrea Spadaccini | |
307 | 60af751d | Andrea Spadaccini | def GetMigrationStatus(self, instance): |
308 | 60af751d | Andrea Spadaccini | """Get the migration status
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309 | 60af751d | Andrea Spadaccini |
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310 | 60af751d | Andrea Spadaccini | The fake hypervisor migration always succeeds.
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311 | 60af751d | Andrea Spadaccini |
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312 | 60af751d | Andrea Spadaccini | @type instance: L{objects.Instance}
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313 | 60af751d | Andrea Spadaccini | @param instance: the instance that is being migrated
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314 | 60af751d | Andrea Spadaccini | @rtype: L{objects.MigrationStatus}
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315 | 60af751d | Andrea Spadaccini | @return: the status of the current migration (one of
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316 | 60af751d | Andrea Spadaccini | L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
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317 | 60af751d | Andrea Spadaccini | progress info that can be retrieved from the hypervisor
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318 | 60af751d | Andrea Spadaccini |
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319 | 60af751d | Andrea Spadaccini | """
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320 | 60af751d | Andrea Spadaccini | return objects.MigrationStatus(status=constants.HV_MIGRATION_COMPLETED) |