root / lib / hypervisor / hv_lxc.py @ 0e1e0b6a
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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 | Since current (Spring 2010) distributions are not yet ready for
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44 | 4b5e40a5 | Iustin Pop | running under a container, the following changes must be done
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45 | 4b5e40a5 | Iustin Pop | manually:
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46 | 4b5e40a5 | Iustin Pop | - remove udev
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47 | 4b5e40a5 | Iustin Pop | - disable the kernel log component of sysklogd/rsyslog/etc.,
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48 | 4b5e40a5 | Iustin Pop | otherwise they will fail to read the log, and at least rsyslog
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49 | 4b5e40a5 | Iustin Pop | will fill the filesystem with error messages
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50 | 4b5e40a5 | Iustin Pop |
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51 | 4b5e40a5 | Iustin Pop | TODO:
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52 | 4b5e40a5 | Iustin Pop | - move hardcoded parameters into hypervisor parameters, once we
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53 | 4b5e40a5 | Iustin Pop | have the container-parameter support
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54 | 4b5e40a5 | Iustin Pop | - implement memory limits, but only optionally, depending on host
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55 | 4b5e40a5 | Iustin Pop | kernel support
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56 | 4b5e40a5 | Iustin Pop |
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57 | 4b5e40a5 | Iustin Pop | Problems/issues:
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58 | 4b5e40a5 | Iustin Pop | - LXC is very temperamental; in daemon mode, it succeeds or fails
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59 | 4b5e40a5 | Iustin Pop | in launching the instance silently, without any error
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60 | 4b5e40a5 | Iustin Pop | indication, and when failing it can leave network interfaces
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61 | 4b5e40a5 | Iustin Pop | around, and future successful startups will list the instance
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62 | 4b5e40a5 | Iustin Pop | twice
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63 | 4b5e40a5 | Iustin Pop | - shutdown sequence of containers leaves the init 'dead', and the
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64 | 4b5e40a5 | Iustin Pop | container effectively stopped, but LXC still believes the
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65 | 4b5e40a5 | Iustin Pop | container to be running; need to investigate using the
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66 | 4b5e40a5 | Iustin Pop | notify_on_release and release_agent feature of cgroups
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67 | 4b5e40a5 | Iustin Pop |
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68 | 4b5e40a5 | Iustin Pop | """
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69 | 9d9bded1 | Michael Hanselmann | _ROOT_DIR = pathutils.RUN_DIR + "/lxc"
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70 | 4b5e40a5 | Iustin Pop | _DEVS = [ |
71 | 4b5e40a5 | Iustin Pop | "c 1:3", # /dev/null |
72 | 4b5e40a5 | Iustin Pop | "c 1:5", # /dev/zero |
73 | 4b5e40a5 | Iustin Pop | "c 1:7", # /dev/full |
74 | 4b5e40a5 | Iustin Pop | "c 1:8", # /dev/random |
75 | 4b5e40a5 | Iustin Pop | "c 1:9", # /dev/urandom |
76 | 4b5e40a5 | Iustin Pop | "c 1:10", # /dev/aio |
77 | 4b5e40a5 | Iustin Pop | "c 5:0", # /dev/tty |
78 | 4b5e40a5 | Iustin Pop | "c 5:1", # /dev/console |
79 | 4b5e40a5 | Iustin Pop | "c 5:2", # /dev/ptmx |
80 | 4b5e40a5 | Iustin Pop | "c 136:*", # first block of Unix98 PTY slaves |
81 | 4b5e40a5 | Iustin Pop | ] |
82 | 4b5e40a5 | Iustin Pop | _DENIED_CAPABILITIES = [ |
83 | 4b5e40a5 | Iustin Pop | "mac_override", # Allow MAC configuration or state changes |
84 | 4b5e40a5 | Iustin Pop | # TODO: remove sys_admin too, for safety
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85 | 4b5e40a5 | Iustin Pop | #"sys_admin", # Perform a range of system administration operations
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86 | 4b5e40a5 | Iustin Pop | "sys_boot", # Use reboot(2) and kexec_load(2) |
87 | 4b5e40a5 | Iustin Pop | "sys_module", # Load and unload kernel modules |
88 | 4b5e40a5 | Iustin Pop | "sys_time", # Set system clock, set real-time (hardware) clock |
89 | 4b5e40a5 | Iustin Pop | ] |
90 | 4b5e40a5 | Iustin Pop | _DIR_MODE = 0755
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91 | 4b5e40a5 | Iustin Pop | |
92 | 4b5e40a5 | Iustin Pop | PARAMETERS = { |
93 | e3ed5316 | Balazs Lecz | constants.HV_CPU_MASK: hv_base.OPT_CPU_MASK_CHECK, |
94 | 4b5e40a5 | Iustin Pop | } |
95 | 4b5e40a5 | Iustin Pop | |
96 | 4b5e40a5 | Iustin Pop | def __init__(self): |
97 | 4b5e40a5 | Iustin Pop | hv_base.BaseHypervisor.__init__(self)
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98 | 4b5e40a5 | Iustin Pop | utils.EnsureDirs([(self._ROOT_DIR, self._DIR_MODE)]) |
99 | 4b5e40a5 | Iustin Pop | |
100 | 4b5e40a5 | Iustin Pop | @staticmethod
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101 | 4b5e40a5 | Iustin Pop | def _GetMountSubdirs(path): |
102 | 4b5e40a5 | Iustin Pop | """Return the list of mountpoints under a given path.
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103 | 4b5e40a5 | Iustin Pop |
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104 | 4b5e40a5 | Iustin Pop | """
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105 | a188f1ef | Balazs Lecz | result = [] |
106 | a188f1ef | Balazs Lecz | for _, mountpoint, _, _ in utils.GetMounts(): |
107 | a188f1ef | Balazs Lecz | if (mountpoint.startswith(path) and |
108 | a188f1ef | Balazs Lecz | mountpoint != path): |
109 | a188f1ef | Balazs Lecz | result.append(mountpoint) |
110 | a188f1ef | Balazs Lecz | |
111 | a188f1ef | Balazs Lecz | result.sort(key=lambda x: x.count("/"), reverse=True) |
112 | a188f1ef | Balazs Lecz | return result
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113 | 4b5e40a5 | Iustin Pop | |
114 | 4b5e40a5 | Iustin Pop | @classmethod
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115 | 4b5e40a5 | Iustin Pop | def _InstanceDir(cls, instance_name): |
116 | 4b5e40a5 | Iustin Pop | """Return the root directory for an instance.
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117 | 4b5e40a5 | Iustin Pop |
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118 | 4b5e40a5 | Iustin Pop | """
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119 | 4b5e40a5 | Iustin Pop | return utils.PathJoin(cls._ROOT_DIR, instance_name)
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120 | 4b5e40a5 | Iustin Pop | |
121 | 4b5e40a5 | Iustin Pop | @classmethod
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122 | 4b5e40a5 | Iustin Pop | def _InstanceConfFile(cls, instance_name): |
123 | 4b5e40a5 | Iustin Pop | """Return the configuration file for an instance.
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124 | 4b5e40a5 | Iustin Pop |
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125 | 4b5e40a5 | Iustin Pop | """
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126 | 4b5e40a5 | Iustin Pop | return utils.PathJoin(cls._ROOT_DIR, instance_name + ".conf") |
127 | 4b5e40a5 | Iustin Pop | |
128 | c4d3e57f | Balazs Lecz | @classmethod
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129 | 13c564e7 | Balazs Lecz | def _InstanceLogFile(cls, instance_name): |
130 | 13c564e7 | Balazs Lecz | """Return the log file for an instance.
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131 | 13c564e7 | Balazs Lecz |
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132 | 13c564e7 | Balazs Lecz | """
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133 | 13c564e7 | Balazs Lecz | return utils.PathJoin(cls._ROOT_DIR, instance_name + ".log") |
134 | 13c564e7 | Balazs Lecz | |
135 | 13c564e7 | Balazs Lecz | @classmethod
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136 | c4d3e57f | Balazs Lecz | def _GetCgroupMountPoint(cls): |
137 | c4d3e57f | Balazs Lecz | for _, mountpoint, fstype, _ in utils.GetMounts(): |
138 | c4d3e57f | Balazs Lecz | if fstype == "cgroup": |
139 | c4d3e57f | Balazs Lecz | return mountpoint
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140 | c4d3e57f | Balazs Lecz | raise errors.HypervisorError("The cgroup filesystem is not mounted") |
141 | c4d3e57f | Balazs Lecz | |
142 | c4d3e57f | Balazs Lecz | @classmethod
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143 | c4d3e57f | Balazs Lecz | def _GetCgroupCpuList(cls, instance_name): |
144 | c4d3e57f | Balazs Lecz | """Return the list of CPU ids for an instance.
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145 | c4d3e57f | Balazs Lecz |
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146 | c4d3e57f | Balazs Lecz | """
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147 | c4d3e57f | Balazs Lecz | cgroup = cls._GetCgroupMountPoint() |
148 | c4d3e57f | Balazs Lecz | try:
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149 | c4d3e57f | Balazs Lecz | cpus = utils.ReadFile(utils.PathJoin(cgroup, |
150 | c4d3e57f | Balazs Lecz | instance_name, |
151 | c4d3e57f | Balazs Lecz | "cpuset.cpus"))
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152 | c4d3e57f | Balazs Lecz | except EnvironmentError, err: |
153 | c4d3e57f | Balazs Lecz | raise errors.HypervisorError("Getting CPU list for instance" |
154 | c4d3e57f | Balazs Lecz | " %s failed: %s" % (instance_name, err))
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155 | e3ed5316 | Balazs Lecz | |
156 | e3ed5316 | Balazs Lecz | return utils.ParseCpuMask(cpus)
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157 | c4d3e57f | Balazs Lecz | |
158 | 4b5e40a5 | Iustin Pop | def ListInstances(self): |
159 | 4b5e40a5 | Iustin Pop | """Get the list of running instances.
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160 | 4b5e40a5 | Iustin Pop |
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161 | 4b5e40a5 | Iustin Pop | """
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162 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["lxc-ls"])
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163 | 4b5e40a5 | Iustin Pop | if result.failed:
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164 | c83864fe | Balazs Lecz | raise errors.HypervisorError("Running lxc-ls failed: %s" % result.output) |
165 | 4b5e40a5 | Iustin Pop | return result.stdout.splitlines()
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166 | 4b5e40a5 | Iustin Pop | |
167 | 4b5e40a5 | Iustin Pop | def GetInstanceInfo(self, instance_name): |
168 | 4b5e40a5 | Iustin Pop | """Get instance properties.
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169 | 4b5e40a5 | Iustin Pop |
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170 | 4b5e40a5 | Iustin Pop | @type instance_name: string
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171 | 4b5e40a5 | Iustin Pop | @param instance_name: the instance name
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172 | 4b5e40a5 | Iustin Pop |
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173 | 4b5e40a5 | Iustin Pop | @return: (name, id, memory, vcpus, stat, times)
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174 | 4b5e40a5 | Iustin Pop |
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175 | 4b5e40a5 | Iustin Pop | """
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176 | 4b5e40a5 | Iustin Pop | # TODO: read container info from the cgroup mountpoint
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177 | d01baf53 | Balazs Lecz | |
178 | d01baf53 | Balazs Lecz | result = utils.RunCmd(["lxc-info", "-n", instance_name]) |
179 | d01baf53 | Balazs Lecz | if result.failed:
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180 | c83864fe | Balazs Lecz | raise errors.HypervisorError("Running lxc-info failed: %s" % |
181 | c83864fe | Balazs Lecz | result.output) |
182 | d01baf53 | Balazs Lecz | # lxc-info output examples:
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183 | d01baf53 | Balazs Lecz | # 'ganeti-lxc-test1' is STOPPED
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184 | d01baf53 | Balazs Lecz | # 'ganeti-lxc-test1' is RUNNING
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185 | d01baf53 | Balazs Lecz | _, state = result.stdout.rsplit(None, 1) |
186 | b8aa46ed | Balazs Lecz | if state != "RUNNING": |
187 | b8aa46ed | Balazs Lecz | return None |
188 | c4d3e57f | Balazs Lecz | |
189 | c4d3e57f | Balazs Lecz | cpu_list = self._GetCgroupCpuList(instance_name)
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190 | b8aa46ed | Balazs Lecz | return (instance_name, 0, 0, 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 | 4b5e40a5 | Iustin Pop | for name in self.ListInstances(): |
200 | 63cef6c3 | Balazs Lecz | data.append(self.GetInstanceInfo(name))
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201 | 4b5e40a5 | Iustin Pop | return data
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202 | 4b5e40a5 | Iustin Pop | |
203 | 4b5e40a5 | Iustin Pop | def _CreateConfigFile(self, instance, root_dir): |
204 | e3ed5316 | Balazs Lecz | """Create an lxc.conf file for an instance.
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205 | e3ed5316 | Balazs Lecz |
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206 | e3ed5316 | Balazs Lecz | """
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207 | 4b5e40a5 | Iustin Pop | out = [] |
208 | 4b5e40a5 | Iustin Pop | # hostname
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209 | 4b5e40a5 | Iustin Pop | out.append("lxc.utsname = %s" % instance.name)
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210 | 4b5e40a5 | Iustin Pop | |
211 | 4b5e40a5 | Iustin Pop | # separate pseudo-TTY instances
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212 | 4b5e40a5 | Iustin Pop | out.append("lxc.pts = 255")
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213 | 637c8ab8 | Balazs Lecz | # standard TTYs
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214 | 4b5e40a5 | Iustin Pop | out.append("lxc.tty = 6")
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215 | 637c8ab8 | Balazs Lecz | # console log file
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216 | 637c8ab8 | Balazs Lecz | console_log = utils.PathJoin(self._ROOT_DIR, instance.name + ".console") |
217 | 637c8ab8 | Balazs Lecz | try:
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218 | 637c8ab8 | Balazs Lecz | utils.WriteFile(console_log, data="", mode=constants.SECURE_FILE_MODE)
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219 | 637c8ab8 | Balazs Lecz | except EnvironmentError, err: |
220 | 637c8ab8 | Balazs Lecz | raise errors.HypervisorError("Creating console log file %s for" |
221 | 637c8ab8 | Balazs Lecz | " instance %s failed: %s" %
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222 | 637c8ab8 | Balazs Lecz | (console_log, instance.name, err)) |
223 | 637c8ab8 | Balazs Lecz | out.append("lxc.console = %s" % console_log)
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224 | 4b5e40a5 | Iustin Pop | |
225 | 4b5e40a5 | Iustin Pop | # root FS
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226 | 4b5e40a5 | Iustin Pop | out.append("lxc.rootfs = %s" % root_dir)
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227 | 4b5e40a5 | Iustin Pop | |
228 | 4b5e40a5 | Iustin Pop | # TODO: additional mounts, if we disable CAP_SYS_ADMIN
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229 | 4b5e40a5 | Iustin Pop | |
230 | e3ed5316 | Balazs Lecz | # CPUs
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231 | e3ed5316 | Balazs Lecz | if instance.hvparams[constants.HV_CPU_MASK]:
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232 | e3ed5316 | Balazs Lecz | cpu_list = utils.ParseCpuMask(instance.hvparams[constants.HV_CPU_MASK]) |
233 | e3ed5316 | Balazs Lecz | cpus_in_mask = len(cpu_list)
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234 | e3ed5316 | Balazs Lecz | if cpus_in_mask != instance.beparams["vcpus"]: |
235 | e3ed5316 | Balazs Lecz | raise errors.HypervisorError("Number of VCPUs (%d) doesn't match" |
236 | e3ed5316 | Balazs Lecz | " the number of CPUs in the"
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237 | e3ed5316 | Balazs Lecz | " cpu_mask (%d)" %
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238 | e3ed5316 | Balazs Lecz | (instance.beparams["vcpus"],
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239 | e3ed5316 | Balazs Lecz | cpus_in_mask)) |
240 | e3ed5316 | Balazs Lecz | out.append("lxc.cgroup.cpuset.cpus = %s" %
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241 | e3ed5316 | Balazs Lecz | instance.hvparams[constants.HV_CPU_MASK]) |
242 | e3ed5316 | Balazs Lecz | |
243 | 4b5e40a5 | Iustin Pop | # Device control
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244 | 4b5e40a5 | Iustin Pop | # deny direct device access
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245 | 4b5e40a5 | Iustin Pop | out.append("lxc.cgroup.devices.deny = a")
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246 | 4b5e40a5 | Iustin Pop | for devinfo in self._DEVS: |
247 | 4b5e40a5 | Iustin Pop | out.append("lxc.cgroup.devices.allow = %s rw" % devinfo)
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248 | 4b5e40a5 | Iustin Pop | |
249 | 4b5e40a5 | Iustin Pop | # Networking
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250 | 4b5e40a5 | Iustin Pop | for idx, nic in enumerate(instance.nics): |
251 | 4b5e40a5 | Iustin Pop | out.append("# NIC %d" % idx)
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252 | 4b5e40a5 | Iustin Pop | mode = nic.nicparams[constants.NIC_MODE] |
253 | 4b5e40a5 | Iustin Pop | link = nic.nicparams[constants.NIC_LINK] |
254 | 4b5e40a5 | Iustin Pop | if mode == constants.NIC_MODE_BRIDGED:
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255 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.type = veth")
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256 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.link = %s" % link)
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257 | 4b5e40a5 | Iustin Pop | else:
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258 | 4b5e40a5 | Iustin Pop | raise errors.HypervisorError("LXC hypervisor only supports" |
259 | 4b5e40a5 | Iustin Pop | " bridged mode (NIC %d has mode %s)" %
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260 | 4b5e40a5 | Iustin Pop | (idx, mode)) |
261 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.hwaddr = %s" % nic.mac)
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262 | 4b5e40a5 | Iustin Pop | out.append("lxc.network.flags = up")
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263 | 4b5e40a5 | Iustin Pop | |
264 | 4b5e40a5 | Iustin Pop | # Capabilities
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265 | 4b5e40a5 | Iustin Pop | for cap in self._DENIED_CAPABILITIES: |
266 | 4b5e40a5 | Iustin Pop | out.append("lxc.cap.drop = %s" % cap)
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267 | 4b5e40a5 | Iustin Pop | |
268 | 4b5e40a5 | Iustin Pop | return "\n".join(out) + "\n" |
269 | 4b5e40a5 | Iustin Pop | |
270 | 323f9095 | Stephen Shirley | def StartInstance(self, instance, block_devices, startup_paused): |
271 | 4b5e40a5 | Iustin Pop | """Start an instance.
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272 | 4b5e40a5 | Iustin Pop |
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273 | e3ed5316 | Balazs Lecz | For LCX, we try to mount the block device and execute 'lxc-start'.
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274 | e3ed5316 | Balazs Lecz | We use volatile containers.
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275 | 4b5e40a5 | Iustin Pop |
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276 | 4b5e40a5 | Iustin Pop | """
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277 | 4b5e40a5 | Iustin Pop | root_dir = self._InstanceDir(instance.name)
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278 | 4b5e40a5 | Iustin Pop | try:
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279 | 4b5e40a5 | Iustin Pop | utils.EnsureDirs([(root_dir, self._DIR_MODE)])
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280 | 4b5e40a5 | Iustin Pop | except errors.GenericError, err:
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281 | c83864fe | Balazs Lecz | raise HypervisorError("Creating instance directory failed: %s", str(err)) |
282 | 4b5e40a5 | Iustin Pop | |
283 | 4b5e40a5 | Iustin Pop | conf_file = self._InstanceConfFile(instance.name)
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284 | 4b5e40a5 | Iustin Pop | utils.WriteFile(conf_file, data=self._CreateConfigFile(instance, root_dir))
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285 | 4b5e40a5 | Iustin Pop | |
286 | 13c564e7 | Balazs Lecz | log_file = self._InstanceLogFile(instance.name)
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287 | 13c564e7 | Balazs Lecz | if not os.path.exists(log_file): |
288 | 13c564e7 | Balazs Lecz | try:
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289 | 13c564e7 | Balazs Lecz | utils.WriteFile(log_file, data="", mode=constants.SECURE_FILE_MODE)
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290 | 13c564e7 | Balazs Lecz | except EnvironmentError, err: |
291 | 13c564e7 | Balazs Lecz | raise errors.HypervisorError("Creating hypervisor log file %s for" |
292 | 13c564e7 | Balazs Lecz | " instance %s failed: %s" %
|
293 | 13c564e7 | Balazs Lecz | (log_file, instance.name, err)) |
294 | 13c564e7 | Balazs Lecz | |
295 | 4b5e40a5 | Iustin Pop | if not os.path.ismount(root_dir): |
296 | 4b5e40a5 | Iustin Pop | if not block_devices: |
297 | 4b5e40a5 | Iustin Pop | raise HypervisorError("LXC needs at least one disk") |
298 | 4b5e40a5 | Iustin Pop | |
299 | 4b5e40a5 | Iustin Pop | sda_dev_path = block_devices[0][1] |
300 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["mount", sda_dev_path, root_dir])
|
301 | 4b5e40a5 | Iustin Pop | if result.failed:
|
302 | c83864fe | Balazs Lecz | raise HypervisorError("Mounting the root dir of LXC instance %s" |
303 | c83864fe | Balazs Lecz | " failed: %s" % (instance.name, result.output))
|
304 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["lxc-start", "-n", instance.name, |
305 | 13c564e7 | Balazs Lecz | "-o", log_file,
|
306 | 13c564e7 | Balazs Lecz | "-l", "DEBUG", |
307 | 4b5e40a5 | Iustin Pop | "-f", conf_file, "-d"]) |
308 | 4b5e40a5 | Iustin Pop | if result.failed:
|
309 | 4b5e40a5 | Iustin Pop | raise HypervisorError("Running the lxc-start script failed: %s" % |
310 | 4b5e40a5 | Iustin Pop | result.output) |
311 | 4b5e40a5 | Iustin Pop | |
312 | 4b5e40a5 | Iustin Pop | def StopInstance(self, instance, force=False, retry=False, name=None): |
313 | 4b5e40a5 | Iustin Pop | """Stop an instance.
|
314 | 4b5e40a5 | Iustin Pop |
|
315 | 4b5e40a5 | Iustin Pop | This method has complicated cleanup tests, as we must:
|
316 | 4b5e40a5 | Iustin Pop | - try to kill all leftover processes
|
317 | 4b5e40a5 | Iustin Pop | - try to unmount any additional sub-mountpoints
|
318 | 4b5e40a5 | Iustin Pop | - finally unmount the instance dir
|
319 | 4b5e40a5 | Iustin Pop |
|
320 | 4b5e40a5 | Iustin Pop | """
|
321 | 4b5e40a5 | Iustin Pop | if name is None: |
322 | 4b5e40a5 | Iustin Pop | name = instance.name |
323 | 4b5e40a5 | Iustin Pop | |
324 | 4b5e40a5 | Iustin Pop | root_dir = self._InstanceDir(name)
|
325 | 4b5e40a5 | Iustin Pop | if not os.path.exists(root_dir): |
326 | 4b5e40a5 | Iustin Pop | return
|
327 | 4b5e40a5 | Iustin Pop | |
328 | 4b5e40a5 | Iustin Pop | if name in self.ListInstances(): |
329 | 4b5e40a5 | Iustin Pop | # Signal init to shutdown; this is a hack
|
330 | 4b5e40a5 | Iustin Pop | if not retry and not force: |
331 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["chroot", root_dir, "poweroff"]) |
332 | 4b5e40a5 | Iustin Pop | if result.failed:
|
333 | c83864fe | Balazs Lecz | raise HypervisorError("Running 'poweroff' on the instance" |
334 | c83864fe | Balazs Lecz | " failed: %s" % result.output)
|
335 | 4b5e40a5 | Iustin Pop | time.sleep(2)
|
336 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["lxc-stop", "-n", name]) |
337 | 4b5e40a5 | Iustin Pop | if result.failed:
|
338 | 4b5e40a5 | Iustin Pop | logging.warning("Error while doing lxc-stop for %s: %s", name,
|
339 | 4b5e40a5 | Iustin Pop | result.output) |
340 | 4b5e40a5 | Iustin Pop | |
341 | 4b5e40a5 | Iustin Pop | for mpath in self._GetMountSubdirs(root_dir): |
342 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["umount", mpath])
|
343 | 4b5e40a5 | Iustin Pop | if result.failed:
|
344 | 4b5e40a5 | Iustin Pop | logging.warning("Error while umounting subpath %s for instance %s: %s",
|
345 | 4b5e40a5 | Iustin Pop | mpath, name, result.output) |
346 | 4b5e40a5 | Iustin Pop | |
347 | 4b5e40a5 | Iustin Pop | result = utils.RunCmd(["umount", root_dir])
|
348 | 4b5e40a5 | Iustin Pop | if result.failed and force: |
349 | 4b5e40a5 | Iustin Pop | msg = ("Processes still alive in the chroot: %s" %
|
350 | 4b5e40a5 | Iustin Pop | utils.RunCmd("fuser -vm %s" % root_dir).output)
|
351 | 4b5e40a5 | Iustin Pop | logging.error(msg) |
352 | c83864fe | Balazs Lecz | raise HypervisorError("Unmounting the chroot dir failed: %s (%s)" % |
353 | 4b5e40a5 | Iustin Pop | (result.output, msg)) |
354 | 4b5e40a5 | Iustin Pop | |
355 | 4b5e40a5 | Iustin Pop | def RebootInstance(self, instance): |
356 | 4b5e40a5 | Iustin Pop | """Reboot an instance.
|
357 | 4b5e40a5 | Iustin Pop |
|
358 | 4b5e40a5 | Iustin Pop | This is not (yet) implemented (in Ganeti) for the LXC hypervisor.
|
359 | 4b5e40a5 | Iustin Pop |
|
360 | 4b5e40a5 | Iustin Pop | """
|
361 | 4b5e40a5 | Iustin Pop | # TODO: implement reboot
|
362 | 4b5e40a5 | Iustin Pop | raise HypervisorError("The LXC hypervisor doesn't implement the" |
363 | 4b5e40a5 | Iustin Pop | " reboot functionality")
|
364 | 4b5e40a5 | Iustin Pop | |
365 | 2e2fb795 | Guido Trotter | def BalloonInstanceMemory(self, instance, mem): |
366 | 2e2fb795 | Guido Trotter | """Balloon an instance memory to a certain value.
|
367 | 2e2fb795 | Guido Trotter |
|
368 | 2e2fb795 | Guido Trotter | @type instance: L{objects.Instance}
|
369 | 2e2fb795 | Guido Trotter | @param instance: instance to be accepted
|
370 | 2e2fb795 | Guido Trotter | @type mem: int
|
371 | 2e2fb795 | Guido Trotter | @param mem: actual memory size to use for instance runtime
|
372 | 2e2fb795 | Guido Trotter |
|
373 | 2e2fb795 | Guido Trotter | """
|
374 | 2e2fb795 | Guido Trotter | # Currently lxc instances don't have memory limits
|
375 | 2e2fb795 | Guido Trotter | pass
|
376 | 2e2fb795 | Guido Trotter | |
377 | 4b5e40a5 | Iustin Pop | def GetNodeInfo(self): |
378 | 4b5e40a5 | Iustin Pop | """Return information about the node.
|
379 | 4b5e40a5 | Iustin Pop |
|
380 | 4b5e40a5 | Iustin Pop | This is just a wrapper over the base GetLinuxNodeInfo method.
|
381 | 4b5e40a5 | Iustin Pop |
|
382 | 4b5e40a5 | Iustin Pop | @return: a dict with the following keys (values in MiB):
|
383 | 4b5e40a5 | Iustin Pop | - memory_total: the total memory size on the node
|
384 | 4b5e40a5 | Iustin Pop | - memory_free: the available memory on the node for instances
|
385 | 4b5e40a5 | Iustin Pop | - memory_dom0: the memory used by the node itself, if available
|
386 | 4b5e40a5 | Iustin Pop |
|
387 | 4b5e40a5 | Iustin Pop | """
|
388 | 4b5e40a5 | Iustin Pop | return self.GetLinuxNodeInfo() |
389 | 4b5e40a5 | Iustin Pop | |
390 | 4b5e40a5 | Iustin Pop | @classmethod
|
391 | 55cc0a44 | Michael Hanselmann | def GetInstanceConsole(cls, instance, hvparams, beparams): |
392 | 4b5e40a5 | Iustin Pop | """Return a command for connecting to the console of an instance.
|
393 | 4b5e40a5 | Iustin Pop |
|
394 | 4b5e40a5 | Iustin Pop | """
|
395 | 55cc0a44 | Michael Hanselmann | return objects.InstanceConsole(instance=instance.name,
|
396 | 55cc0a44 | Michael Hanselmann | kind=constants.CONS_SSH, |
397 | 55cc0a44 | Michael Hanselmann | host=instance.primary_node, |
398 | 55cc0a44 | Michael Hanselmann | user=constants.GANETI_RUNAS, |
399 | 55cc0a44 | Michael Hanselmann | command=["lxc-console", "-n", instance.name]) |
400 | 4b5e40a5 | Iustin Pop | |
401 | 4b5e40a5 | Iustin Pop | def Verify(self): |
402 | 4b5e40a5 | Iustin Pop | """Verify the hypervisor.
|
403 | 4b5e40a5 | Iustin Pop |
|
404 | 4b5e40a5 | Iustin Pop | For the chroot manager, it just checks the existence of the base dir.
|
405 | 4b5e40a5 | Iustin Pop |
|
406 | 4b5e40a5 | Iustin Pop | """
|
407 | 4b5e40a5 | Iustin Pop | if not os.path.exists(self._ROOT_DIR): |
408 | 4b5e40a5 | Iustin Pop | return "The required directory '%s' does not exist." % self._ROOT_DIR |
409 | 4b5e40a5 | Iustin Pop | |
410 | 4b5e40a5 | Iustin Pop | @classmethod
|
411 | 4b5e40a5 | Iustin Pop | def PowercycleNode(cls): |
412 | 4b5e40a5 | Iustin Pop | """LXC powercycle, just a wrapper over Linux powercycle.
|
413 | 4b5e40a5 | Iustin Pop |
|
414 | 4b5e40a5 | Iustin Pop | """
|
415 | 4b5e40a5 | Iustin Pop | cls.LinuxPowercycle() |
416 | 4b5e40a5 | Iustin Pop | |
417 | 4b5e40a5 | Iustin Pop | def MigrateInstance(self, instance, target, live): |
418 | 4b5e40a5 | Iustin Pop | """Migrate an instance.
|
419 | 4b5e40a5 | Iustin Pop |
|
420 | 4b5e40a5 | Iustin Pop | @type instance: L{objects.Instance}
|
421 | 4b5e40a5 | Iustin Pop | @param instance: the instance to be migrated
|
422 | 4b5e40a5 | Iustin Pop | @type target: string
|
423 | 4b5e40a5 | Iustin Pop | @param target: hostname (usually ip) of the target node
|
424 | 4b5e40a5 | Iustin Pop | @type live: boolean
|
425 | 4b5e40a5 | Iustin Pop | @param live: whether to do a live or non-live migration
|
426 | 4b5e40a5 | Iustin Pop |
|
427 | 4b5e40a5 | Iustin Pop | """
|
428 | c83864fe | Balazs Lecz | raise HypervisorError("Migration is not supported by the LXC hypervisor") |
429 | 60af751d | Andrea Spadaccini | |
430 | 60af751d | Andrea Spadaccini | def GetMigrationStatus(self, instance): |
431 | 60af751d | Andrea Spadaccini | """Get the migration status
|
432 | 60af751d | Andrea Spadaccini |
|
433 | 60af751d | Andrea Spadaccini | @type instance: L{objects.Instance}
|
434 | 60af751d | Andrea Spadaccini | @param instance: the instance that is being migrated
|
435 | 60af751d | Andrea Spadaccini | @rtype: L{objects.MigrationStatus}
|
436 | 60af751d | Andrea Spadaccini | @return: the status of the current migration (one of
|
437 | 60af751d | Andrea Spadaccini | L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
|
438 | 60af751d | Andrea Spadaccini | progress info that can be retrieved from the hypervisor
|
439 | 60af751d | Andrea Spadaccini |
|
440 | 60af751d | Andrea Spadaccini | """
|
441 | 60af751d | Andrea Spadaccini | raise HypervisorError("Migration is not supported by the LXC hypervisor") |