root / lib / hypervisor / hv_lxc.py @ e4157912
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2 | 4b5e40a5 | Iustin Pop | #
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3 | 4b5e40a5 | Iustin Pop | |
4 | 4b5e40a5 | Iustin Pop | # Copyright (C) 2010 Google Inc.
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5 | 4b5e40a5 | Iustin Pop | #
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6 | 4b5e40a5 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | 4b5e40a5 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | 4b5e40a5 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | 4b5e40a5 | Iustin Pop | # (at your option) any later version.
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10 | 4b5e40a5 | Iustin Pop | #
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11 | 4b5e40a5 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | 4b5e40a5 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 4b5e40a5 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 4b5e40a5 | Iustin Pop | # General Public License for more details.
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15 | 4b5e40a5 | Iustin Pop | #
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16 | 4b5e40a5 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | 4b5e40a5 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | 4b5e40a5 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 4b5e40a5 | Iustin Pop | # 02110-1301, USA.
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20 | 4b5e40a5 | Iustin Pop | |
21 | 4b5e40a5 | Iustin Pop | |
22 | 4b5e40a5 | Iustin Pop | """LXC hypervisor
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23 | 4b5e40a5 | Iustin Pop |
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24 | 4b5e40a5 | Iustin Pop | """
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25 | 4b5e40a5 | Iustin Pop | |
26 | 4b5e40a5 | Iustin Pop | import os |
27 | 4b5e40a5 | Iustin Pop | import os.path |
28 | 4b5e40a5 | Iustin Pop | import time |
29 | 4b5e40a5 | Iustin Pop | import logging |
30 | 4b5e40a5 | Iustin Pop | |
31 | 4b5e40a5 | Iustin Pop | from ganeti import constants |
32 | b459a848 | Andrea Spadaccini | from ganeti import errors # pylint: disable=W0611 |
33 | 4b5e40a5 | Iustin Pop | from ganeti import utils |
34 | 55cc0a44 | Michael Hanselmann | from ganeti import objects |
35 | 9d9bded1 | Michael Hanselmann | from ganeti import pathutils |
36 | 4b5e40a5 | Iustin Pop | from ganeti.hypervisor import hv_base |
37 | 4b5e40a5 | Iustin Pop | from ganeti.errors import HypervisorError |
38 | 4b5e40a5 | Iustin Pop | |
39 | 4b5e40a5 | Iustin Pop | |
40 | 4b5e40a5 | Iustin Pop | class LXCHypervisor(hv_base.BaseHypervisor): |
41 | 4b5e40a5 | Iustin Pop | """LXC-based virtualization.
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42 | 4b5e40a5 | Iustin Pop |
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43 | 4b5e40a5 | Iustin Pop | TODO:
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44 | 4b5e40a5 | Iustin Pop | - move hardcoded parameters into hypervisor parameters, once we
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45 | 4b5e40a5 | Iustin Pop | have the container-parameter support
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46 | 4b5e40a5 | Iustin Pop |
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47 | 4b5e40a5 | Iustin Pop | Problems/issues:
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48 | 4b5e40a5 | Iustin Pop | - LXC is very temperamental; in daemon mode, it succeeds or fails
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49 | 4b5e40a5 | Iustin Pop | in launching the instance silently, without any error
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50 | 4b5e40a5 | Iustin Pop | indication, and when failing it can leave network interfaces
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51 | 4b5e40a5 | Iustin Pop | around, and future successful startups will list the instance
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52 | 4b5e40a5 | Iustin Pop | twice
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53 | 4b5e40a5 | Iustin Pop |
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54 | 4b5e40a5 | Iustin Pop | """
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55 | 9d9bded1 | Michael Hanselmann | _ROOT_DIR = pathutils.RUN_DIR + "/lxc"
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56 | 4b5e40a5 | Iustin Pop | _DEVS = [ |
57 | 4b5e40a5 | Iustin Pop | "c 1:3", # /dev/null |
58 | 4b5e40a5 | Iustin Pop | "c 1:5", # /dev/zero |
59 | 4b5e40a5 | Iustin Pop | "c 1:7", # /dev/full |
60 | 4b5e40a5 | Iustin Pop | "c 1:8", # /dev/random |
61 | 4b5e40a5 | Iustin Pop | "c 1:9", # /dev/urandom |
62 | 4b5e40a5 | Iustin Pop | "c 1:10", # /dev/aio |
63 | 4b5e40a5 | Iustin Pop | "c 5:0", # /dev/tty |
64 | 4b5e40a5 | Iustin Pop | "c 5:1", # /dev/console |
65 | 4b5e40a5 | Iustin Pop | "c 5:2", # /dev/ptmx |
66 | 4b5e40a5 | Iustin Pop | "c 136:*", # first block of Unix98 PTY slaves |
67 | 4b5e40a5 | Iustin Pop | ] |
68 | 4b5e40a5 | Iustin Pop | _DENIED_CAPABILITIES = [ |
69 | 4b5e40a5 | Iustin Pop | "mac_override", # Allow MAC configuration or state changes |
70 | 4b5e40a5 | Iustin Pop | # TODO: remove sys_admin too, for safety
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71 | 4b5e40a5 | Iustin Pop | #"sys_admin", # Perform a range of system administration operations
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72 | 4b5e40a5 | Iustin Pop | "sys_boot", # Use reboot(2) and kexec_load(2) |
73 | 4b5e40a5 | Iustin Pop | "sys_module", # Load and unload kernel modules |
74 | 4b5e40a5 | Iustin Pop | "sys_time", # Set system clock, set real-time (hardware) clock |
75 | 4b5e40a5 | Iustin Pop | ] |
76 | 4b5e40a5 | Iustin Pop | _DIR_MODE = 0755
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77 | 4b5e40a5 | Iustin Pop | |
78 | 4b5e40a5 | Iustin Pop | PARAMETERS = { |
79 | e3ed5316 | Balazs Lecz | constants.HV_CPU_MASK: hv_base.OPT_CPU_MASK_CHECK, |
80 | 4b5e40a5 | Iustin Pop | } |
81 | 4b5e40a5 | Iustin Pop | |
82 | 4b5e40a5 | Iustin Pop | def __init__(self): |
83 | 4b5e40a5 | Iustin Pop | hv_base.BaseHypervisor.__init__(self)
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84 | 4b5e40a5 | Iustin Pop | utils.EnsureDirs([(self._ROOT_DIR, self._DIR_MODE)]) |
85 | 4b5e40a5 | Iustin Pop | |
86 | 4b5e40a5 | Iustin Pop | @staticmethod
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87 | 4b5e40a5 | Iustin Pop | def _GetMountSubdirs(path): |
88 | 4b5e40a5 | Iustin Pop | """Return the list of mountpoints under a given path.
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89 | 4b5e40a5 | Iustin Pop |
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90 | 4b5e40a5 | Iustin Pop | """
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91 | a188f1ef | Balazs Lecz | result = [] |
92 | a188f1ef | Balazs Lecz | for _, mountpoint, _, _ in utils.GetMounts(): |
93 | a188f1ef | Balazs Lecz | if (mountpoint.startswith(path) and |
94 | a188f1ef | Balazs Lecz | mountpoint != path): |
95 | a188f1ef | Balazs Lecz | result.append(mountpoint) |
96 | a188f1ef | Balazs Lecz | |
97 | a188f1ef | Balazs Lecz | result.sort(key=lambda x: x.count("/"), reverse=True) |
98 | a188f1ef | Balazs Lecz | return result
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99 | 4b5e40a5 | Iustin Pop | |
100 | 4b5e40a5 | Iustin Pop | @classmethod
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101 | 4b5e40a5 | Iustin Pop | def _InstanceDir(cls, instance_name): |
102 | 4b5e40a5 | Iustin Pop | """Return the root directory for an instance.
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103 | 4b5e40a5 | Iustin Pop |
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104 | 4b5e40a5 | Iustin Pop | """
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105 | 4b5e40a5 | Iustin Pop | return utils.PathJoin(cls._ROOT_DIR, instance_name)
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106 | 4b5e40a5 | Iustin Pop | |
107 | 4b5e40a5 | Iustin Pop | @classmethod
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108 | 4b5e40a5 | Iustin Pop | def _InstanceConfFile(cls, instance_name): |
109 | 4b5e40a5 | Iustin Pop | """Return the configuration file for an instance.
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110 | 4b5e40a5 | Iustin Pop |
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111 | 4b5e40a5 | Iustin Pop | """
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112 | 4b5e40a5 | Iustin Pop | return utils.PathJoin(cls._ROOT_DIR, instance_name + ".conf") |
113 | 4b5e40a5 | Iustin Pop | |
114 | c4d3e57f | Balazs Lecz | @classmethod
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115 | 13c564e7 | Balazs Lecz | def _InstanceLogFile(cls, instance_name): |
116 | 13c564e7 | Balazs Lecz | """Return the log file for an instance.
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117 | 13c564e7 | Balazs Lecz |
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118 | 13c564e7 | Balazs Lecz | """
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119 | 13c564e7 | Balazs Lecz | return utils.PathJoin(cls._ROOT_DIR, instance_name + ".log") |
120 | 13c564e7 | Balazs Lecz | |
121 | 13c564e7 | Balazs Lecz | @classmethod
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122 | c4d3e57f | Balazs Lecz | def _GetCgroupMountPoint(cls): |
123 | c4d3e57f | Balazs Lecz | for _, mountpoint, fstype, _ in utils.GetMounts(): |
124 | c4d3e57f | Balazs Lecz | if fstype == "cgroup": |
125 | c4d3e57f | Balazs Lecz | return mountpoint
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126 | c4d3e57f | Balazs Lecz | raise errors.HypervisorError("The cgroup filesystem is not mounted") |
127 | c4d3e57f | Balazs Lecz | |
128 | c4d3e57f | Balazs Lecz | @classmethod
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129 | c4d3e57f | Balazs Lecz | def _GetCgroupCpuList(cls, instance_name): |
130 | c4d3e57f | Balazs Lecz | """Return the list of CPU ids for an instance.
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131 | c4d3e57f | Balazs Lecz |
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132 | c4d3e57f | Balazs Lecz | """
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133 | c4d3e57f | Balazs Lecz | cgroup = cls._GetCgroupMountPoint() |
134 | c4d3e57f | Balazs Lecz | try:
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135 | 2e5a6203 | Faidon Liambotis | cpus = utils.ReadFile(utils.PathJoin(cgroup, 'lxc',
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136 | c4d3e57f | Balazs Lecz | instance_name, |
137 | c4d3e57f | Balazs Lecz | "cpuset.cpus"))
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138 | c4d3e57f | Balazs Lecz | except EnvironmentError, err: |
139 | c4d3e57f | Balazs Lecz | raise errors.HypervisorError("Getting CPU list for instance" |
140 | c4d3e57f | Balazs Lecz | " %s failed: %s" % (instance_name, err))
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141 | e3ed5316 | Balazs Lecz | |
142 | e3ed5316 | Balazs Lecz | return utils.ParseCpuMask(cpus)
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143 | c4d3e57f | Balazs Lecz | |
144 | f078c799 | Faidon Liambotis | @classmethod
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145 | f078c799 | Faidon Liambotis | def _GetCgroupMemoryLimit(cls, instance_name): |
146 | f078c799 | Faidon Liambotis | """Return the memory limit for an instance
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147 | f078c799 | Faidon Liambotis |
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148 | f078c799 | Faidon Liambotis | """
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149 | f078c799 | Faidon Liambotis | cgroup = cls._GetCgroupMountPoint() |
150 | f078c799 | Faidon Liambotis | try:
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151 | f078c799 | Faidon Liambotis | memory = int(utils.ReadFile(utils.PathJoin(cgroup, 'lxc', |
152 | e4157912 | Guido Trotter | instance_name, |
153 | e4157912 | Guido Trotter | "memory.limit_in_bytes")))
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154 | f078c799 | Faidon Liambotis | except EnvironmentError: |
155 | f078c799 | Faidon Liambotis | # memory resource controller may be disabled, ignore
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156 | f078c799 | Faidon Liambotis | memory = 0
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157 | f078c799 | Faidon Liambotis | |
158 | f078c799 | Faidon Liambotis | return memory
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159 | f078c799 | Faidon Liambotis | |
160 | 4b5e40a5 | Iustin Pop | def ListInstances(self): |
161 | 4b5e40a5 | Iustin Pop | """Get the list of running instances.
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162 | 4b5e40a5 | Iustin Pop |
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163 | 4b5e40a5 | Iustin Pop | """
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164 | e4157912 | Guido Trotter | return [iinfo[0] for iinfo in self.GetAllInstancesInfo()] |
165 | 4b5e40a5 | Iustin Pop | |
166 | 4b5e40a5 | Iustin Pop | def GetInstanceInfo(self, instance_name): |
167 | 4b5e40a5 | Iustin Pop | """Get instance properties.
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168 | 4b5e40a5 | Iustin Pop |
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169 | 4b5e40a5 | Iustin Pop | @type instance_name: string
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170 | 4b5e40a5 | Iustin Pop | @param instance_name: the instance name
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171 | f078c799 | Faidon Liambotis | @rtype: tuple of strings
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172 | 4b5e40a5 | Iustin Pop | @return: (name, id, memory, vcpus, stat, times)
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173 | 4b5e40a5 | Iustin Pop |
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174 | 4b5e40a5 | Iustin Pop | """
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175 | 4b5e40a5 | Iustin Pop | # TODO: read container info from the cgroup mountpoint
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176 | d01baf53 | Balazs Lecz | |
177 | 2e5a6203 | Faidon Liambotis | result = utils.RunCmd(["lxc-info", "-s", "-n", instance_name]) |
178 | d01baf53 | Balazs Lecz | if result.failed:
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179 | c83864fe | Balazs Lecz | raise errors.HypervisorError("Running lxc-info failed: %s" % |
180 | c83864fe | Balazs Lecz | result.output) |
181 | d01baf53 | Balazs Lecz | # lxc-info output examples:
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182 | 2e5a6203 | Faidon Liambotis | # 'state: STOPPED
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183 | 2e5a6203 | Faidon Liambotis | # 'state: RUNNING
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184 | d01baf53 | Balazs Lecz | _, state = result.stdout.rsplit(None, 1) |
185 | b8aa46ed | Balazs Lecz | if state != "RUNNING": |
186 | b8aa46ed | Balazs Lecz | return None |
187 | c4d3e57f | Balazs Lecz | |
188 | c4d3e57f | Balazs Lecz | cpu_list = self._GetCgroupCpuList(instance_name)
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189 | f078c799 | Faidon Liambotis | memory = self._GetCgroupMemoryLimit(instance_name) / (1024 ** 2) |
190 | f078c799 | Faidon Liambotis | return (instance_name, 0, memory, len(cpu_list), 0, 0) |
191 | 4b5e40a5 | Iustin Pop | |
192 | 4b5e40a5 | Iustin Pop | def GetAllInstancesInfo(self): |
193 | 4b5e40a5 | Iustin Pop | """Get properties of all instances.
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194 | 4b5e40a5 | Iustin Pop |
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195 | 4b5e40a5 | Iustin Pop | @return: [(name, id, memory, vcpus, stat, times),...]
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196 | 4b5e40a5 | Iustin Pop |
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197 | 4b5e40a5 | Iustin Pop | """
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198 | 4b5e40a5 | Iustin Pop | data = [] |
199 | 2e5a6203 | Faidon Liambotis | for name in os.listdir(self._ROOT_DIR): |
200 | 2e5a6203 | Faidon Liambotis | try:
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201 | 2e5a6203 | Faidon Liambotis | info = self.GetInstanceInfo(name)
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202 | 2e5a6203 | Faidon Liambotis | except errors.HypervisorError:
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203 | 2e5a6203 | Faidon Liambotis | continue
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204 | 2e5a6203 | Faidon Liambotis | if info:
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205 | 2e5a6203 | Faidon Liambotis | data.append(info) |
206 | 4b5e40a5 | Iustin Pop | return data
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207 | 4b5e40a5 | Iustin Pop | |
208 | 4b5e40a5 | Iustin Pop | def _CreateConfigFile(self, instance, root_dir): |
209 | e3ed5316 | Balazs Lecz | """Create an lxc.conf file for an instance.
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210 | e3ed5316 | Balazs Lecz |
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211 | e3ed5316 | Balazs Lecz | """
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212 | 4b5e40a5 | Iustin Pop | out = [] |
213 | 4b5e40a5 | Iustin Pop | # hostname
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214 | 4b5e40a5 | Iustin Pop | out.append("lxc.utsname = %s" % instance.name)
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215 | 4b5e40a5 | Iustin Pop | |
216 | 4b5e40a5 | Iustin Pop | # separate pseudo-TTY instances
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217 | 4b5e40a5 | Iustin Pop | out.append("lxc.pts = 255")
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218 | 637c8ab8 | Balazs Lecz | # standard TTYs
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219 | 4b5e40a5 | Iustin Pop | out.append("lxc.tty = 6")
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220 | 637c8ab8 | Balazs Lecz | # console log file
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221 | 637c8ab8 | Balazs Lecz | console_log = utils.PathJoin(self._ROOT_DIR, instance.name + ".console") |
222 | 637c8ab8 | Balazs Lecz | try:
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223 | 637c8ab8 | Balazs Lecz | utils.WriteFile(console_log, data="", mode=constants.SECURE_FILE_MODE)
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224 | 637c8ab8 | Balazs Lecz | except EnvironmentError, err: |
225 | 637c8ab8 | Balazs Lecz | raise errors.HypervisorError("Creating console log file %s for" |
226 | 637c8ab8 | Balazs Lecz | " instance %s failed: %s" %
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227 | 637c8ab8 | Balazs Lecz | (console_log, instance.name, err)) |
228 | 637c8ab8 | Balazs Lecz | out.append("lxc.console = %s" % console_log)
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229 | 4b5e40a5 | Iustin Pop | |
230 | 4b5e40a5 | Iustin Pop | # root FS
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231 | 4b5e40a5 | Iustin Pop | out.append("lxc.rootfs = %s" % root_dir)
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232 | 4b5e40a5 | Iustin Pop | |
233 | 4b5e40a5 | Iustin Pop | # TODO: additional mounts, if we disable CAP_SYS_ADMIN
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234 | 4b5e40a5 | Iustin Pop | |
235 | e3ed5316 | Balazs Lecz | # CPUs
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236 | e3ed5316 | Balazs Lecz | if instance.hvparams[constants.HV_CPU_MASK]:
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237 | e3ed5316 | Balazs Lecz | cpu_list = utils.ParseCpuMask(instance.hvparams[constants.HV_CPU_MASK]) |
238 | e3ed5316 | Balazs Lecz | cpus_in_mask = len(cpu_list)
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239 | e3ed5316 | Balazs Lecz | if cpus_in_mask != instance.beparams["vcpus"]: |
240 | e3ed5316 | Balazs Lecz | raise errors.HypervisorError("Number of VCPUs (%d) doesn't match" |
241 | e3ed5316 | Balazs Lecz | " the number of CPUs in the"
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242 | e3ed5316 | Balazs Lecz | " cpu_mask (%d)" %
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243 | e3ed5316 | Balazs Lecz | (instance.beparams["vcpus"],
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244 | e3ed5316 | Balazs Lecz | cpus_in_mask)) |
245 | e3ed5316 | Balazs Lecz | out.append("lxc.cgroup.cpuset.cpus = %s" %
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246 | e3ed5316 | Balazs Lecz | instance.hvparams[constants.HV_CPU_MASK]) |
247 | e3ed5316 | Balazs Lecz | |
248 | f078c799 | Faidon Liambotis | # Memory
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249 | f078c799 | Faidon Liambotis | # Conditionally enable, memory resource controller might be disabled
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250 | f078c799 | Faidon Liambotis | cgroup = self._GetCgroupMountPoint()
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251 | f078c799 | Faidon Liambotis | if os.path.exists(utils.PathJoin(cgroup, 'memory.limit_in_bytes')): |
252 | e4157912 | Guido Trotter | out.append("lxc.cgroup.memory.limit_in_bytes = %dM" %
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253 | e4157912 | Guido Trotter | instance.beparams[constants.BE_MAXMEM]) |
254 | f078c799 | Faidon Liambotis | |
255 | f078c799 | Faidon Liambotis | if os.path.exists(utils.PathJoin(cgroup, 'memory.memsw.limit_in_bytes')): |
256 | e4157912 | Guido Trotter | out.append("lxc.cgroup.memory.memsw.limit_in_bytes = %dM" %
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257 | e4157912 | Guido Trotter | instance.beparams[constants.BE_MAXMEM]) |
258 | f078c799 | Faidon Liambotis | |
259 | 4b5e40a5 | Iustin Pop | # Device control
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260 | 4b5e40a5 | Iustin Pop | # deny direct device access
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261 | 4b5e40a5 | Iustin Pop | out.append("lxc.cgroup.devices.deny = a")
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262 | 4b5e40a5 | Iustin Pop | for devinfo in self._DEVS: |
263 | 4b5e40a5 | Iustin Pop | out.append("lxc.cgroup.devices.allow = %s rw" % devinfo)
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264 | 4b5e40a5 | Iustin Pop | |
265 | 4b5e40a5 | Iustin Pop | # Networking
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266 | 4b5e40a5 | Iustin Pop | for idx, nic in enumerate(instance.nics): |
267 | 4b5e40a5 | Iustin Pop | out.append("# NIC %d" % idx)
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268 | 4b5e40a5 | Iustin Pop | mode = nic.nicparams[constants.NIC_MODE] |
269 | 4b5e40a5 | Iustin Pop | link = nic.nicparams[constants.NIC_LINK] |
270 | 4b5e40a5 | Iustin Pop | if mode == constants.NIC_MODE_BRIDGED:
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271 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.type = veth")
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272 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.link = %s" % link)
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273 | 4b5e40a5 | Iustin Pop | else:
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274 | 4b5e40a5 | Iustin Pop | raise errors.HypervisorError("LXC hypervisor only supports" |
275 | 4b5e40a5 | Iustin Pop | " bridged mode (NIC %d has mode %s)" %
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276 | 4b5e40a5 | Iustin Pop | (idx, mode)) |
277 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.hwaddr = %s" % nic.mac)
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278 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.flags = up")
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279 | 4b5e40a5 | Iustin Pop | |
280 | 4b5e40a5 | Iustin Pop | # Capabilities
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281 | 4b5e40a5 | Iustin Pop | for cap in self._DENIED_CAPABILITIES: |
282 | 4b5e40a5 | Iustin Pop | out.append("lxc.cap.drop = %s" % cap)
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283 | 4b5e40a5 | Iustin Pop | |
284 | 4b5e40a5 | Iustin Pop | return "\n".join(out) + "\n" |
285 | 4b5e40a5 | Iustin Pop | |
286 | 323f9095 | Stephen Shirley | def StartInstance(self, instance, block_devices, startup_paused): |
287 | 4b5e40a5 | Iustin Pop | """Start an instance.
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288 | 4b5e40a5 | Iustin Pop |
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289 | 2e5a6203 | Faidon Liambotis | For LXC, we try to mount the block device and execute 'lxc-start'.
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290 | e3ed5316 | Balazs Lecz | We use volatile containers.
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291 | 4b5e40a5 | Iustin Pop |
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292 | 4b5e40a5 | Iustin Pop | """
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293 | 4b5e40a5 | Iustin Pop | root_dir = self._InstanceDir(instance.name)
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294 | 4b5e40a5 | Iustin Pop | try:
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295 | 4b5e40a5 | Iustin Pop | utils.EnsureDirs([(root_dir, self._DIR_MODE)])
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296 | 4b5e40a5 | Iustin Pop | except errors.GenericError, err:
|
297 | c83864fe | Balazs Lecz | raise HypervisorError("Creating instance directory failed: %s", str(err)) |
298 | 4b5e40a5 | Iustin Pop | |
299 | 4b5e40a5 | Iustin Pop | conf_file = self._InstanceConfFile(instance.name)
|
300 | 4b5e40a5 | Iustin Pop | utils.WriteFile(conf_file, data=self._CreateConfigFile(instance, root_dir))
|
301 | 4b5e40a5 | Iustin Pop | |
302 | 13c564e7 | Balazs Lecz | log_file = self._InstanceLogFile(instance.name)
|
303 | 13c564e7 | Balazs Lecz | if not os.path.exists(log_file): |
304 | 13c564e7 | Balazs Lecz | try:
|
305 | 13c564e7 | Balazs Lecz | utils.WriteFile(log_file, data="", mode=constants.SECURE_FILE_MODE)
|
306 | 13c564e7 | Balazs Lecz | except EnvironmentError, err: |
307 | 13c564e7 | Balazs Lecz | raise errors.HypervisorError("Creating hypervisor log file %s for" |
308 | 13c564e7 | Balazs Lecz | " instance %s failed: %s" %
|
309 | 13c564e7 | Balazs Lecz | (log_file, instance.name, err)) |
310 | 13c564e7 | Balazs Lecz | |
311 | 4b5e40a5 | Iustin Pop | if not os.path.ismount(root_dir): |
312 | 4b5e40a5 | Iustin Pop | if not block_devices: |
313 | 4b5e40a5 | Iustin Pop | raise HypervisorError("LXC needs at least one disk") |
314 | 4b5e40a5 | Iustin Pop | |
315 | 4b5e40a5 | Iustin Pop | sda_dev_path = block_devices[0][1] |
316 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["mount", sda_dev_path, root_dir])
|
317 | 4b5e40a5 | Iustin Pop | if result.failed:
|
318 | c83864fe | Balazs Lecz | raise HypervisorError("Mounting the root dir of LXC instance %s" |
319 | c83864fe | Balazs Lecz | " failed: %s" % (instance.name, result.output))
|
320 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["lxc-start", "-n", instance.name, |
321 | 13c564e7 | Balazs Lecz | "-o", log_file,
|
322 | 13c564e7 | Balazs Lecz | "-l", "DEBUG", |
323 | 4b5e40a5 | Iustin Pop | "-f", conf_file, "-d"]) |
324 | 4b5e40a5 | Iustin Pop | if result.failed:
|
325 | 4b5e40a5 | Iustin Pop | raise HypervisorError("Running the lxc-start script failed: %s" % |
326 | 4b5e40a5 | Iustin Pop | result.output) |
327 | 4b5e40a5 | Iustin Pop | |
328 | 4b5e40a5 | Iustin Pop | def StopInstance(self, instance, force=False, retry=False, name=None): |
329 | 4b5e40a5 | Iustin Pop | """Stop an instance.
|
330 | 4b5e40a5 | Iustin Pop |
|
331 | 4b5e40a5 | Iustin Pop | This method has complicated cleanup tests, as we must:
|
332 | 4b5e40a5 | Iustin Pop | - try to kill all leftover processes
|
333 | 4b5e40a5 | Iustin Pop | - try to unmount any additional sub-mountpoints
|
334 | 4b5e40a5 | Iustin Pop | - finally unmount the instance dir
|
335 | 4b5e40a5 | Iustin Pop |
|
336 | 4b5e40a5 | Iustin Pop | """
|
337 | 4b5e40a5 | Iustin Pop | if name is None: |
338 | 4b5e40a5 | Iustin Pop | name = instance.name |
339 | 4b5e40a5 | Iustin Pop | |
340 | 4b5e40a5 | Iustin Pop | root_dir = self._InstanceDir(name)
|
341 | 4b5e40a5 | Iustin Pop | if not os.path.exists(root_dir): |
342 | 4b5e40a5 | Iustin Pop | return
|
343 | 4b5e40a5 | Iustin Pop | |
344 | 4b5e40a5 | Iustin Pop | if name in self.ListInstances(): |
345 | 4b5e40a5 | Iustin Pop | # Signal init to shutdown; this is a hack
|
346 | 4b5e40a5 | Iustin Pop | if not retry and not force: |
347 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["chroot", root_dir, "poweroff"]) |
348 | 4b5e40a5 | Iustin Pop | if result.failed:
|
349 | c83864fe | Balazs Lecz | raise HypervisorError("Running 'poweroff' on the instance" |
350 | c83864fe | Balazs Lecz | " failed: %s" % result.output)
|
351 | 4b5e40a5 | Iustin Pop | time.sleep(2)
|
352 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["lxc-stop", "-n", name]) |
353 | 4b5e40a5 | Iustin Pop | if result.failed:
|
354 | 4b5e40a5 | Iustin Pop | logging.warning("Error while doing lxc-stop for %s: %s", name,
|
355 | 4b5e40a5 | Iustin Pop | result.output) |
356 | 4b5e40a5 | Iustin Pop | |
357 | 2e5a6203 | Faidon Liambotis | if not os.path.ismount(root_dir): |
358 | e4157912 | Guido Trotter | return
|
359 | 2e5a6203 | Faidon Liambotis | |
360 | 4b5e40a5 | Iustin Pop | for mpath in self._GetMountSubdirs(root_dir): |
361 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["umount", mpath])
|
362 | 4b5e40a5 | Iustin Pop | if result.failed:
|
363 | 4b5e40a5 | Iustin Pop | logging.warning("Error while umounting subpath %s for instance %s: %s",
|
364 | 4b5e40a5 | Iustin Pop | mpath, name, result.output) |
365 | 4b5e40a5 | Iustin Pop | |
366 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["umount", root_dir])
|
367 | 4b5e40a5 | Iustin Pop | if result.failed and force: |
368 | 4b5e40a5 | Iustin Pop | msg = ("Processes still alive in the chroot: %s" %
|
369 | 4b5e40a5 | Iustin Pop | utils.RunCmd("fuser -vm %s" % root_dir).output)
|
370 | 4b5e40a5 | Iustin Pop | logging.error(msg) |
371 | c83864fe | Balazs Lecz | raise HypervisorError("Unmounting the chroot dir failed: %s (%s)" % |
372 | 4b5e40a5 | Iustin Pop | (result.output, msg)) |
373 | 4b5e40a5 | Iustin Pop | |
374 | 4b5e40a5 | Iustin Pop | def RebootInstance(self, instance): |
375 | 4b5e40a5 | Iustin Pop | """Reboot an instance.
|
376 | 4b5e40a5 | Iustin Pop |
|
377 | 4b5e40a5 | Iustin Pop | This is not (yet) implemented (in Ganeti) for the LXC hypervisor.
|
378 | 4b5e40a5 | Iustin Pop |
|
379 | 4b5e40a5 | Iustin Pop | """
|
380 | 4b5e40a5 | Iustin Pop | # TODO: implement reboot
|
381 | 4b5e40a5 | Iustin Pop | raise HypervisorError("The LXC hypervisor doesn't implement the" |
382 | 4b5e40a5 | Iustin Pop | " reboot functionality")
|
383 | 4b5e40a5 | Iustin Pop | |
384 | 2e2fb795 | Guido Trotter | def BalloonInstanceMemory(self, instance, mem): |
385 | 2e2fb795 | Guido Trotter | """Balloon an instance memory to a certain value.
|
386 | 2e2fb795 | Guido Trotter |
|
387 | 2e2fb795 | Guido Trotter | @type instance: L{objects.Instance}
|
388 | 2e2fb795 | Guido Trotter | @param instance: instance to be accepted
|
389 | 2e2fb795 | Guido Trotter | @type mem: int
|
390 | 2e2fb795 | Guido Trotter | @param mem: actual memory size to use for instance runtime
|
391 | 2e2fb795 | Guido Trotter |
|
392 | 2e2fb795 | Guido Trotter | """
|
393 | 2e2fb795 | Guido Trotter | # Currently lxc instances don't have memory limits
|
394 | 2e2fb795 | Guido Trotter | pass
|
395 | 2e2fb795 | Guido Trotter | |
396 | 4b5e40a5 | Iustin Pop | def GetNodeInfo(self): |
397 | 4b5e40a5 | Iustin Pop | """Return information about the node.
|
398 | 4b5e40a5 | Iustin Pop |
|
399 | 4b5e40a5 | Iustin Pop | This is just a wrapper over the base GetLinuxNodeInfo method.
|
400 | 4b5e40a5 | Iustin Pop |
|
401 | 4b5e40a5 | Iustin Pop | @return: a dict with the following keys (values in MiB):
|
402 | 4b5e40a5 | Iustin Pop | - memory_total: the total memory size on the node
|
403 | 4b5e40a5 | Iustin Pop | - memory_free: the available memory on the node for instances
|
404 | 4b5e40a5 | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
|
405 | 4b5e40a5 | Iustin Pop |
|
406 | 4b5e40a5 | Iustin Pop | """
|
407 | 4b5e40a5 | Iustin Pop | return self.GetLinuxNodeInfo() |
408 | 4b5e40a5 | Iustin Pop | |
409 | 4b5e40a5 | Iustin Pop | @classmethod
|
410 | 55cc0a44 | Michael Hanselmann | def GetInstanceConsole(cls, instance, hvparams, beparams): |
411 | 4b5e40a5 | Iustin Pop | """Return a command for connecting to the console of an instance.
|
412 | 4b5e40a5 | Iustin Pop |
|
413 | 4b5e40a5 | Iustin Pop | """
|
414 | 55cc0a44 | Michael Hanselmann | return objects.InstanceConsole(instance=instance.name,
|
415 | 55cc0a44 | Michael Hanselmann | kind=constants.CONS_SSH, |
416 | 55cc0a44 | Michael Hanselmann | host=instance.primary_node, |
417 | 052783ff | Michael Hanselmann | user=constants.SSH_CONSOLE_USER, |
418 | 55cc0a44 | Michael Hanselmann | command=["lxc-console", "-n", instance.name]) |
419 | 4b5e40a5 | Iustin Pop | |
420 | 4b5e40a5 | Iustin Pop | def Verify(self): |
421 | 4b5e40a5 | Iustin Pop | """Verify the hypervisor.
|
422 | 4b5e40a5 | Iustin Pop |
|
423 | cd04dfd2 | Michael Hanselmann | For the LXC manager, it just checks the existence of the base dir.
|
424 | cd04dfd2 | Michael Hanselmann |
|
425 | cd04dfd2 | Michael Hanselmann | @return: Problem description if something is wrong, C{None} otherwise
|
426 | 4b5e40a5 | Iustin Pop |
|
427 | 4b5e40a5 | Iustin Pop | """
|
428 | cd04dfd2 | Michael Hanselmann | if os.path.exists(self._ROOT_DIR): |
429 | cd04dfd2 | Michael Hanselmann | return None |
430 | cd04dfd2 | Michael Hanselmann | else:
|
431 | cd04dfd2 | Michael Hanselmann | return "The required directory '%s' does not exist" % self._ROOT_DIR |
432 | 4b5e40a5 | Iustin Pop | |
433 | 4b5e40a5 | Iustin Pop | @classmethod
|
434 | 4b5e40a5 | Iustin Pop | def PowercycleNode(cls): |
435 | 4b5e40a5 | Iustin Pop | """LXC powercycle, just a wrapper over Linux powercycle.
|
436 | 4b5e40a5 | Iustin Pop |
|
437 | 4b5e40a5 | Iustin Pop | """
|
438 | 4b5e40a5 | Iustin Pop | cls.LinuxPowercycle() |
439 | 4b5e40a5 | Iustin Pop | |
440 | 4b5e40a5 | Iustin Pop | def MigrateInstance(self, instance, target, live): |
441 | 4b5e40a5 | Iustin Pop | """Migrate an instance.
|
442 | 4b5e40a5 | Iustin Pop |
|
443 | 4b5e40a5 | Iustin Pop | @type instance: L{objects.Instance}
|
444 | 4b5e40a5 | Iustin Pop | @param instance: the instance to be migrated
|
445 | 4b5e40a5 | Iustin Pop | @type target: string
|
446 | 4b5e40a5 | Iustin Pop | @param target: hostname (usually ip) of the target node
|
447 | 4b5e40a5 | Iustin Pop | @type live: boolean
|
448 | 4b5e40a5 | Iustin Pop | @param live: whether to do a live or non-live migration
|
449 | 4b5e40a5 | Iustin Pop |
|
450 | 4b5e40a5 | Iustin Pop | """
|
451 | c83864fe | Balazs Lecz | raise HypervisorError("Migration is not supported by the LXC hypervisor") |
452 | 60af751d | Andrea Spadaccini | |
453 | 60af751d | Andrea Spadaccini | def GetMigrationStatus(self, instance): |
454 | 60af751d | Andrea Spadaccini | """Get the migration status
|
455 | 60af751d | Andrea Spadaccini |
|
456 | 60af751d | Andrea Spadaccini | @type instance: L{objects.Instance}
|
457 | 60af751d | Andrea Spadaccini | @param instance: the instance that is being migrated
|
458 | 60af751d | Andrea Spadaccini | @rtype: L{objects.MigrationStatus}
|
459 | 60af751d | Andrea Spadaccini | @return: the status of the current migration (one of
|
460 | 60af751d | Andrea Spadaccini | L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
|
461 | 60af751d | Andrea Spadaccini | progress info that can be retrieved from the hypervisor
|
462 | 60af751d | Andrea Spadaccini |
|
463 | 60af751d | Andrea Spadaccini | """
|
464 | 60af751d | Andrea Spadaccini | raise HypervisorError("Migration is not supported by the LXC hypervisor") |