root / lib / hypervisor / hv_fake.py @ f9897b6d
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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 | 65a6f9b7 | Michael Hanselmann | |
29 | 65a6f9b7 | Michael Hanselmann | from ganeti import utils |
30 | 65a6f9b7 | Michael Hanselmann | from ganeti import constants |
31 | 65a6f9b7 | Michael Hanselmann | from ganeti import errors |
32 | a2d32034 | Michael Hanselmann | from ganeti.hypervisor import hv_base |
33 | 65a6f9b7 | Michael Hanselmann | |
34 | 65a6f9b7 | Michael Hanselmann | |
35 | a2d32034 | Michael Hanselmann | class FakeHypervisor(hv_base.BaseHypervisor): |
36 | 65a6f9b7 | Michael Hanselmann | """Fake hypervisor interface.
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37 | 65a6f9b7 | Michael Hanselmann |
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38 | 65a6f9b7 | Michael Hanselmann | This can be used for testing the ganeti code without having to have
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39 | 65a6f9b7 | Michael Hanselmann | a real virtualisation software installed.
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40 | 65a6f9b7 | Michael Hanselmann |
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41 | 65a6f9b7 | Michael Hanselmann | """
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42 | 65a6f9b7 | Michael Hanselmann | _ROOT_DIR = constants.RUN_DIR + "/ganeti-fake-hypervisor"
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43 | 65a6f9b7 | Michael Hanselmann | |
44 | 65a6f9b7 | Michael Hanselmann | def __init__(self): |
45 | a2d32034 | Michael Hanselmann | hv_base.BaseHypervisor.__init__(self)
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46 | 65a6f9b7 | Michael Hanselmann | if not os.path.exists(self._ROOT_DIR): |
47 | 65a6f9b7 | Michael Hanselmann | os.mkdir(self._ROOT_DIR)
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48 | 65a6f9b7 | Michael Hanselmann | |
49 | 65a6f9b7 | Michael Hanselmann | def ListInstances(self): |
50 | 65a6f9b7 | Michael Hanselmann | """Get the list of running instances.
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51 | 65a6f9b7 | Michael Hanselmann |
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52 | 65a6f9b7 | Michael Hanselmann | """
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53 | 65a6f9b7 | Michael Hanselmann | return os.listdir(self._ROOT_DIR) |
54 | 65a6f9b7 | Michael Hanselmann | |
55 | 65a6f9b7 | Michael Hanselmann | def GetInstanceInfo(self, instance_name): |
56 | 65a6f9b7 | Michael Hanselmann | """Get instance properties.
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57 | 65a6f9b7 | Michael Hanselmann |
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58 | c41eea6e | Iustin Pop | @param instance_name: the instance name
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59 | c41eea6e | Iustin Pop |
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60 | c41eea6e | Iustin Pop | @return: tuple of (name, id, memory, vcpus, stat, times)
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61 | 65a6f9b7 | Michael Hanselmann |
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62 | 65a6f9b7 | Michael Hanselmann | """
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63 | 65a6f9b7 | Michael Hanselmann | file_name = "%s/%s" % (self._ROOT_DIR, instance_name) |
64 | 65a6f9b7 | Michael Hanselmann | if not os.path.exists(file_name): |
65 | 65a6f9b7 | Michael Hanselmann | return None |
66 | 65a6f9b7 | Michael Hanselmann | try:
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67 | bfc30ec0 | Iustin Pop | fh = open(file_name, "r") |
68 | 65a6f9b7 | Michael Hanselmann | try:
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69 | 65a6f9b7 | Michael Hanselmann | inst_id = fh.readline().strip() |
70 | bfc30ec0 | Iustin Pop | memory = utils.TryConvert(int, fh.readline().strip())
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71 | bfc30ec0 | Iustin Pop | vcpus = utils.TryConvert(fh.readline().strip()) |
72 | 65a6f9b7 | Michael Hanselmann | stat = "---b-"
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73 | 65a6f9b7 | Michael Hanselmann | times = "0"
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74 | 65a6f9b7 | Michael Hanselmann | return (instance_name, inst_id, memory, vcpus, stat, times)
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75 | 65a6f9b7 | Michael Hanselmann | finally:
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76 | 65a6f9b7 | Michael Hanselmann | fh.close() |
77 | 65a6f9b7 | Michael Hanselmann | except IOError, err: |
78 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to list instance %s: %s" % |
79 | 65a6f9b7 | Michael Hanselmann | (instance_name, err)) |
80 | 65a6f9b7 | Michael Hanselmann | |
81 | 65a6f9b7 | Michael Hanselmann | def GetAllInstancesInfo(self): |
82 | 65a6f9b7 | Michael Hanselmann | """Get properties of all instances.
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83 | 65a6f9b7 | Michael Hanselmann |
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84 | c41eea6e | Iustin Pop | @return: list of tuples (name, id, memory, vcpus, stat, times)
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85 | c41eea6e | Iustin Pop |
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86 | 65a6f9b7 | Michael Hanselmann | """
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87 | 65a6f9b7 | Michael Hanselmann | data = [] |
88 | 65a6f9b7 | Michael Hanselmann | for file_name in os.listdir(self._ROOT_DIR): |
89 | 65a6f9b7 | Michael Hanselmann | try:
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90 | d73ef63f | Michael Hanselmann | fh = open(self._ROOT_DIR + "/" + file_name, "r") |
91 | 65a6f9b7 | Michael Hanselmann | inst_id = "-1"
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92 | bfc30ec0 | Iustin Pop | memory = 0
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93 | bfc30ec0 | Iustin Pop | vcpus = 1
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94 | 65a6f9b7 | Michael Hanselmann | stat = "-----"
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95 | 65a6f9b7 | Michael Hanselmann | times = "-1"
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96 | 65a6f9b7 | Michael Hanselmann | try:
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97 | 65a6f9b7 | Michael Hanselmann | inst_id = fh.readline().strip() |
98 | bfc30ec0 | Iustin Pop | memory = utils.TryConvert(int, fh.readline().strip())
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99 | bfc30ec0 | Iustin Pop | vcpus = utils.TryConvert(int, fh.readline().strip())
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100 | 65a6f9b7 | Michael Hanselmann | stat = "---b-"
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101 | 65a6f9b7 | Michael Hanselmann | times = "0"
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102 | 65a6f9b7 | Michael Hanselmann | finally:
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103 | 65a6f9b7 | Michael Hanselmann | fh.close() |
104 | 65a6f9b7 | Michael Hanselmann | data.append((file_name, inst_id, memory, vcpus, stat, times)) |
105 | 65a6f9b7 | Michael Hanselmann | except IOError, err: |
106 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to list instances: %s" % err) |
107 | 65a6f9b7 | Michael Hanselmann | return data
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108 | 65a6f9b7 | Michael Hanselmann | |
109 | 07813a9e | Iustin Pop | def StartInstance(self, instance, block_devices): |
110 | 65a6f9b7 | Michael Hanselmann | """Start an instance.
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111 | 65a6f9b7 | Michael Hanselmann |
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112 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, it just creates a file in the base dir,
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113 | 65a6f9b7 | Michael Hanselmann | creating an exception if it already exists. We don't actually
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114 | 65a6f9b7 | Michael Hanselmann | handle race conditions properly, since these are *FAKE* instances.
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115 | 65a6f9b7 | Michael Hanselmann |
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116 | 65a6f9b7 | Michael Hanselmann | """
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117 | 65a6f9b7 | Michael Hanselmann | file_name = self._ROOT_DIR + "/%s" % instance.name |
118 | 65a6f9b7 | Michael Hanselmann | if os.path.exists(file_name):
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119 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to start instance %s: %s" % |
120 | 65a6f9b7 | Michael Hanselmann | (instance.name, "already running"))
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121 | 65a6f9b7 | Michael Hanselmann | try:
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122 | 65a6f9b7 | Michael Hanselmann | fh = file(file_name, "w") |
123 | 65a6f9b7 | Michael Hanselmann | try:
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124 | 8b3fd458 | Iustin Pop | fh.write("0\n%d\n%d\n" %
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125 | 8b3fd458 | Iustin Pop | (instance.beparams[constants.BE_MEMORY], |
126 | 8b3fd458 | Iustin Pop | instance.beparams[constants.BE_VCPUS])) |
127 | 65a6f9b7 | Michael Hanselmann | finally:
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128 | 65a6f9b7 | Michael Hanselmann | fh.close() |
129 | 65a6f9b7 | Michael Hanselmann | except IOError, err: |
130 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to start instance %s: %s" % |
131 | 65a6f9b7 | Michael Hanselmann | (instance.name, err)) |
132 | 65a6f9b7 | Michael Hanselmann | |
133 | 65a6f9b7 | Michael Hanselmann | def StopInstance(self, instance, force=False): |
134 | 65a6f9b7 | Michael Hanselmann | """Stop an instance.
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135 | 65a6f9b7 | Michael Hanselmann |
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136 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, this just removes the file in the base
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137 | 65a6f9b7 | Michael Hanselmann | dir, if it exist, otherwise we raise an exception.
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138 | 65a6f9b7 | Michael Hanselmann |
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139 | 65a6f9b7 | Michael Hanselmann | """
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140 | 65a6f9b7 | Michael Hanselmann | file_name = self._ROOT_DIR + "/%s" % instance.name |
141 | 65a6f9b7 | Michael Hanselmann | if not os.path.exists(file_name): |
142 | 65a6f9b7 | Michael Hanselmann | raise errors.HypervisorError("Failed to stop instance %s: %s" % |
143 | 65a6f9b7 | Michael Hanselmann | (instance.name, "not running"))
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144 | 65a6f9b7 | Michael Hanselmann | utils.RemoveFile(file_name) |
145 | 65a6f9b7 | Michael Hanselmann | |
146 | 65a6f9b7 | Michael Hanselmann | def RebootInstance(self, instance): |
147 | 65a6f9b7 | Michael Hanselmann | """Reboot an instance.
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148 | 65a6f9b7 | Michael Hanselmann |
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149 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, this does nothing.
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150 | 65a6f9b7 | Michael Hanselmann |
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151 | 65a6f9b7 | Michael Hanselmann | """
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152 | 65a6f9b7 | Michael Hanselmann | return
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153 | 65a6f9b7 | Michael Hanselmann | |
154 | 65a6f9b7 | Michael Hanselmann | def GetNodeInfo(self): |
155 | 65a6f9b7 | Michael Hanselmann | """Return information about the node.
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156 | 65a6f9b7 | Michael Hanselmann |
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157 | 572e52bf | Iustin Pop | This is just a wrapper over the base GetLinuxNodeInfo method.
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158 | 572e52bf | Iustin Pop |
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159 | c41eea6e | Iustin Pop | @return: a dict with the following keys (values in MiB):
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160 | c41eea6e | Iustin Pop | - memory_total: the total memory size on the node
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161 | c41eea6e | Iustin Pop | - memory_free: the available memory on the node for instances
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162 | c41eea6e | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
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163 | 65a6f9b7 | Michael Hanselmann |
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164 | 65a6f9b7 | Michael Hanselmann | """
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165 | 572e52bf | Iustin Pop | result = self.GetLinuxNodeInfo()
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166 | bfc30ec0 | Iustin Pop | # substract running instances
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167 | bfc30ec0 | Iustin Pop | all_instances = self.GetAllInstancesInfo()
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168 | bfc30ec0 | Iustin Pop | result['memory_free'] -= min(result['memory_free'], |
169 | bfc30ec0 | Iustin Pop | sum([row[2] for row in all_instances])) |
170 | 65a6f9b7 | Michael Hanselmann | return result
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171 | 65a6f9b7 | Michael Hanselmann | |
172 | 637ce7f9 | Guido Trotter | @classmethod
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173 | 5431b2e4 | Guido Trotter | def GetShellCommandForConsole(cls, instance, hvparams, beparams): |
174 | 65a6f9b7 | Michael Hanselmann | """Return a command for connecting to the console of an instance.
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175 | 65a6f9b7 | Michael Hanselmann |
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176 | 65a6f9b7 | Michael Hanselmann | """
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177 | 65a6f9b7 | Michael Hanselmann | return "echo Console not available for fake hypervisor" |
178 | 65a6f9b7 | Michael Hanselmann | |
179 | 65a6f9b7 | Michael Hanselmann | def Verify(self): |
180 | 65a6f9b7 | Michael Hanselmann | """Verify the hypervisor.
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181 | 65a6f9b7 | Michael Hanselmann |
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182 | 65a6f9b7 | Michael Hanselmann | For the fake hypervisor, it just checks the existence of the base
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183 | 65a6f9b7 | Michael Hanselmann | dir.
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184 | 65a6f9b7 | Michael Hanselmann |
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185 | 65a6f9b7 | Michael Hanselmann | """
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186 | 65a6f9b7 | Michael Hanselmann | if not os.path.exists(self._ROOT_DIR): |
187 | 65a6f9b7 | Michael Hanselmann | return "The required directory '%s' does not exist." % self._ROOT_DIR |
188 | f5118ade | Iustin Pop | |
189 | f5118ade | Iustin Pop | @classmethod
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190 | f5118ade | Iustin Pop | def PowercycleNode(cls): |
191 | f5118ade | Iustin Pop | """Fake hypervisor powercycle, just a wrapper over Linux powercycle.
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192 | f5118ade | Iustin Pop |
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193 | f5118ade | Iustin Pop | """
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194 | f5118ade | Iustin Pop | cls.LinuxPowercycle() |