root / lib / hypervisor / hv_kvm.py @ 1cc831ea
History | View | Annotate | Download (33.2 kB)
1 |
#
|
---|---|
2 |
#
|
3 |
|
4 |
# Copyright (C) 2008 Google Inc.
|
5 |
#
|
6 |
# This program is free software; you can redistribute it and/or modify
|
7 |
# it under the terms of the GNU General Public License as published by
|
8 |
# the Free Software Foundation; either version 2 of the License, or
|
9 |
# (at your option) any later version.
|
10 |
#
|
11 |
# This program is distributed in the hope that it will be useful, but
|
12 |
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 |
# General Public License for more details.
|
15 |
#
|
16 |
# You should have received a copy of the GNU General Public License
|
17 |
# along with this program; if not, write to the Free Software
|
18 |
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 |
# 02110-1301, USA.
|
20 |
|
21 |
|
22 |
"""KVM hypervisor
|
23 |
|
24 |
"""
|
25 |
|
26 |
import os |
27 |
import os.path |
28 |
import re |
29 |
import tempfile |
30 |
import time |
31 |
import logging |
32 |
import pwd |
33 |
from cStringIO import StringIO |
34 |
|
35 |
from ganeti import utils |
36 |
from ganeti import constants |
37 |
from ganeti import errors |
38 |
from ganeti import serializer |
39 |
from ganeti import objects |
40 |
from ganeti import uidpool |
41 |
from ganeti import ssconf |
42 |
from ganeti.hypervisor import hv_base |
43 |
|
44 |
|
45 |
class KVMHypervisor(hv_base.BaseHypervisor): |
46 |
"""KVM hypervisor interface"""
|
47 |
CAN_MIGRATE = True
|
48 |
|
49 |
_ROOT_DIR = constants.RUN_GANETI_DIR + "/kvm-hypervisor"
|
50 |
_PIDS_DIR = _ROOT_DIR + "/pid" # contains live instances pids |
51 |
_UIDS_DIR = _ROOT_DIR + "/uid" # contains instances reserved uids |
52 |
_CTRL_DIR = _ROOT_DIR + "/ctrl" # contains instances control sockets |
53 |
_CONF_DIR = _ROOT_DIR + "/conf" # contains instances startup data |
54 |
_DIRS = [_ROOT_DIR, _PIDS_DIR, _UIDS_DIR, _CTRL_DIR, _CONF_DIR] |
55 |
|
56 |
PARAMETERS = { |
57 |
constants.HV_KERNEL_PATH: hv_base.OPT_FILE_CHECK, |
58 |
constants.HV_INITRD_PATH: hv_base.OPT_FILE_CHECK, |
59 |
constants.HV_ROOT_PATH: hv_base.NO_CHECK, |
60 |
constants.HV_KERNEL_ARGS: hv_base.NO_CHECK, |
61 |
constants.HV_ACPI: hv_base.NO_CHECK, |
62 |
constants.HV_SERIAL_CONSOLE: hv_base.NO_CHECK, |
63 |
constants.HV_VNC_BIND_ADDRESS: |
64 |
(False, lambda x: (utils.IsValidIP(x) or utils.IsNormAbsPath(x)), |
65 |
"the VNC bind address must be either a valid IP address or an absolute"
|
66 |
" pathname", None, None), |
67 |
constants.HV_VNC_TLS: hv_base.NO_CHECK, |
68 |
constants.HV_VNC_X509: hv_base.OPT_DIR_CHECK, |
69 |
constants.HV_VNC_X509_VERIFY: hv_base.NO_CHECK, |
70 |
constants.HV_VNC_PASSWORD_FILE: hv_base.OPT_FILE_CHECK, |
71 |
constants.HV_CDROM_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
72 |
constants.HV_BOOT_ORDER: |
73 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_BO_TYPES),
|
74 |
constants.HV_NIC_TYPE: |
75 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_NIC_TYPES),
|
76 |
constants.HV_DISK_TYPE: |
77 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_DISK_TYPES),
|
78 |
constants.HV_USB_MOUSE: |
79 |
hv_base.ParamInSet(False, constants.HT_KVM_VALID_MOUSE_TYPES),
|
80 |
constants.HV_MIGRATION_PORT: hv_base.NET_PORT_CHECK, |
81 |
constants.HV_USE_LOCALTIME: hv_base.NO_CHECK, |
82 |
constants.HV_DISK_CACHE: |
83 |
hv_base.ParamInSet(True, constants.HT_VALID_CACHE_TYPES),
|
84 |
constants.HV_SECURITY_MODEL: |
85 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_SM_TYPES),
|
86 |
constants.HV_SECURITY_DOMAIN: hv_base.NO_CHECK, |
87 |
constants.HV_KVM_FLAG: |
88 |
hv_base.ParamInSet(False, constants.HT_KVM_FLAG_VALUES),
|
89 |
} |
90 |
|
91 |
_MIGRATION_STATUS_RE = re.compile('Migration\s+status:\s+(\w+)',
|
92 |
re.M | re.I) |
93 |
_MIGRATION_INFO_MAX_BAD_ANSWERS = 5
|
94 |
_MIGRATION_INFO_RETRY_DELAY = 2
|
95 |
|
96 |
_KVM_NETWORK_SCRIPT = constants.SYSCONFDIR + "/ganeti/kvm-vif-bridge"
|
97 |
|
98 |
ANCILLARY_FILES = [ |
99 |
_KVM_NETWORK_SCRIPT, |
100 |
] |
101 |
|
102 |
def __init__(self): |
103 |
hv_base.BaseHypervisor.__init__(self)
|
104 |
# Let's make sure the directories we need exist, even if the RUN_DIR lives
|
105 |
# in a tmpfs filesystem or has been otherwise wiped out.
|
106 |
dirs = [(dname, constants.RUN_DIRS_MODE) for dname in self._DIRS] |
107 |
utils.EnsureDirs(dirs) |
108 |
|
109 |
@classmethod
|
110 |
def _InstancePidFile(cls, instance_name): |
111 |
"""Returns the instance pidfile.
|
112 |
|
113 |
"""
|
114 |
return utils.PathJoin(cls._PIDS_DIR, instance_name)
|
115 |
|
116 |
@classmethod
|
117 |
def _InstanceUidFile(cls, instance_name): |
118 |
"""Returns the instance uidfile.
|
119 |
|
120 |
"""
|
121 |
return utils.PathJoin(cls._UIDS_DIR, instance_name)
|
122 |
|
123 |
@classmethod
|
124 |
def _InstancePidInfo(cls, pid): |
125 |
"""Check pid file for instance information.
|
126 |
|
127 |
Check that a pid file is associated with an instance, and retrieve
|
128 |
information from its command line.
|
129 |
|
130 |
@type pid: string or int
|
131 |
@param pid: process id of the instance to check
|
132 |
@rtype: tuple
|
133 |
@return: (instance_name, memory, vcpus)
|
134 |
@raise errors.HypervisorError: when an instance cannot be found
|
135 |
|
136 |
"""
|
137 |
alive = utils.IsProcessAlive(pid) |
138 |
if not alive: |
139 |
raise errors.HypervisorError("Cannot get info for pid %s" % pid) |
140 |
|
141 |
cmdline_file = utils.PathJoin("/proc", str(pid), "cmdline") |
142 |
try:
|
143 |
cmdline = utils.ReadFile(cmdline_file) |
144 |
except EnvironmentError, err: |
145 |
raise errors.HypervisorError("Can't open cmdline file for pid %s: %s" % |
146 |
(pid, err)) |
147 |
|
148 |
instance = None
|
149 |
memory = 0
|
150 |
vcpus = 0
|
151 |
|
152 |
arg_list = cmdline.split('\x00')
|
153 |
while arg_list:
|
154 |
arg = arg_list.pop(0)
|
155 |
if arg == "-name": |
156 |
instance = arg_list.pop(0)
|
157 |
elif arg == "-m": |
158 |
memory = int(arg_list.pop(0)) |
159 |
elif arg == "-smp": |
160 |
vcpus = int(arg_list.pop(0)) |
161 |
|
162 |
if instance is None: |
163 |
raise errors.HypervisorError("Pid %s doesn't contain a ganeti kvm" |
164 |
" instance" % pid)
|
165 |
|
166 |
return (instance, memory, vcpus)
|
167 |
|
168 |
def _InstancePidAlive(self, instance_name): |
169 |
"""Returns the instance pidfile, pid, and liveness.
|
170 |
|
171 |
@type instance_name: string
|
172 |
@param instance_name: instance name
|
173 |
@rtype: tuple
|
174 |
@return: (pid file name, pid, liveness)
|
175 |
|
176 |
"""
|
177 |
pidfile = self._InstancePidFile(instance_name)
|
178 |
pid = utils.ReadPidFile(pidfile) |
179 |
|
180 |
alive = False
|
181 |
try:
|
182 |
cmd_instance = self._InstancePidInfo(pid)[0] |
183 |
alive = (cmd_instance == instance_name) |
184 |
except errors.HypervisorError:
|
185 |
pass
|
186 |
|
187 |
return (pidfile, pid, alive)
|
188 |
|
189 |
def _CheckDown(self, instance_name): |
190 |
"""Raises an error unless the given instance is down.
|
191 |
|
192 |
"""
|
193 |
alive = self._InstancePidAlive(instance_name)[2] |
194 |
if alive:
|
195 |
raise errors.HypervisorError("Failed to start instance %s: %s" % |
196 |
(instance_name, "already running"))
|
197 |
|
198 |
@classmethod
|
199 |
def _InstanceMonitor(cls, instance_name): |
200 |
"""Returns the instance monitor socket name
|
201 |
|
202 |
"""
|
203 |
return utils.PathJoin(cls._CTRL_DIR, "%s.monitor" % instance_name) |
204 |
|
205 |
@classmethod
|
206 |
def _InstanceSerial(cls, instance_name): |
207 |
"""Returns the instance serial socket name
|
208 |
|
209 |
"""
|
210 |
return utils.PathJoin(cls._CTRL_DIR, "%s.serial" % instance_name) |
211 |
|
212 |
@staticmethod
|
213 |
def _SocatUnixConsoleParams(): |
214 |
"""Returns the correct parameters for socat
|
215 |
|
216 |
If we have a new-enough socat we can use raw mode with an escape character.
|
217 |
|
218 |
"""
|
219 |
if constants.SOCAT_USE_ESCAPE:
|
220 |
return "raw,echo=0,escape=%s" % constants.SOCAT_ESCAPE_CODE |
221 |
else:
|
222 |
return "echo=0,icanon=0" |
223 |
|
224 |
@classmethod
|
225 |
def _InstanceKVMRuntime(cls, instance_name): |
226 |
"""Returns the instance KVM runtime filename
|
227 |
|
228 |
"""
|
229 |
return utils.PathJoin(cls._CONF_DIR, "%s.runtime" % instance_name) |
230 |
|
231 |
@classmethod
|
232 |
def _TryReadUidFile(cls, uid_file): |
233 |
"""Try to read a uid file
|
234 |
|
235 |
"""
|
236 |
if os.path.exists(uid_file):
|
237 |
try:
|
238 |
uid = int(utils.ReadFile(uid_file))
|
239 |
return uid
|
240 |
except EnvironmentError: |
241 |
logging.warning("Can't read uid file", exc_info=True) |
242 |
except (TypeError, ValueError): |
243 |
logging.warning("Can't parse uid file contents", exc_info=True) |
244 |
return None |
245 |
|
246 |
@classmethod
|
247 |
def _RemoveInstanceRuntimeFiles(cls, pidfile, instance_name): |
248 |
"""Removes an instance's rutime sockets/files.
|
249 |
|
250 |
"""
|
251 |
utils.RemoveFile(pidfile) |
252 |
utils.RemoveFile(cls._InstanceMonitor(instance_name)) |
253 |
utils.RemoveFile(cls._InstanceSerial(instance_name)) |
254 |
utils.RemoveFile(cls._InstanceKVMRuntime(instance_name)) |
255 |
uid_file = cls._InstanceUidFile(instance_name) |
256 |
uid = cls._TryReadUidFile(uid_file) |
257 |
utils.RemoveFile(uid_file) |
258 |
if uid is not None: |
259 |
uidpool.ReleaseUid(uid) |
260 |
|
261 |
def _WriteNetScript(self, instance, seq, nic): |
262 |
"""Write a script to connect a net interface to the proper bridge.
|
263 |
|
264 |
This can be used by any qemu-type hypervisor.
|
265 |
|
266 |
@param instance: instance we're acting on
|
267 |
@type instance: instance object
|
268 |
@param seq: nic sequence number
|
269 |
@type seq: int
|
270 |
@param nic: nic we're acting on
|
271 |
@type nic: nic object
|
272 |
@return: netscript file name
|
273 |
@rtype: string
|
274 |
|
275 |
"""
|
276 |
script = StringIO() |
277 |
script.write("#!/bin/sh\n")
|
278 |
script.write("# this is autogenerated by Ganeti, please do not edit\n#\n")
|
279 |
script.write("PATH=$PATH:/sbin:/usr/sbin\n")
|
280 |
script.write("export INSTANCE=%s\n" % instance.name)
|
281 |
script.write("export MAC=%s\n" % nic.mac)
|
282 |
if nic.ip:
|
283 |
script.write("export IP=%s\n" % nic.ip)
|
284 |
script.write("export MODE=%s\n" % nic.nicparams[constants.NIC_MODE])
|
285 |
if nic.nicparams[constants.NIC_LINK]:
|
286 |
script.write("export LINK=%s\n" % nic.nicparams[constants.NIC_LINK])
|
287 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
288 |
script.write("export BRIDGE=%s\n" % nic.nicparams[constants.NIC_LINK])
|
289 |
script.write("export INTERFACE=$1\n")
|
290 |
if instance.tags:
|
291 |
script.write("export TAGS=\"%s\"\n" % " ".join(instance.tags)) |
292 |
# TODO: make this configurable at ./configure time
|
293 |
script.write("if [ -x '%s' ]; then\n" % self._KVM_NETWORK_SCRIPT) |
294 |
script.write(" # Execute the user-specific vif file\n")
|
295 |
script.write(" %s\n" % self._KVM_NETWORK_SCRIPT) |
296 |
script.write("else\n")
|
297 |
script.write(" ifconfig $INTERFACE 0.0.0.0 up\n")
|
298 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
299 |
script.write(" # Connect the interface to the bridge\n")
|
300 |
script.write(" brctl addif $BRIDGE $INTERFACE\n")
|
301 |
elif nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_ROUTED:
|
302 |
if not nic.ip: |
303 |
raise errors.HypervisorError("nic/%d is routed, but has no ip." % seq) |
304 |
script.write(" # Route traffic targeted at the IP to the interface\n")
|
305 |
if nic.nicparams[constants.NIC_LINK]:
|
306 |
script.write(" while ip rule del dev $INTERFACE; do :; done\n")
|
307 |
script.write(" ip rule add dev $INTERFACE table $LINK\n")
|
308 |
script.write(" ip route replace $IP table $LINK proto static"
|
309 |
" dev $INTERFACE\n")
|
310 |
else:
|
311 |
script.write(" ip route replace $IP proto static"
|
312 |
" dev $INTERFACE\n")
|
313 |
interface_v4_conf = "/proc/sys/net/ipv4/conf/$INTERFACE"
|
314 |
interface_v6_conf = "/proc/sys/net/ipv6/conf/$INTERFACE"
|
315 |
script.write(" if [ -d %s ]; then\n" % interface_v4_conf)
|
316 |
script.write(" echo 1 > %s/proxy_arp\n" % interface_v4_conf)
|
317 |
script.write(" echo 1 > %s/forwarding\n" % interface_v4_conf)
|
318 |
script.write(" fi\n")
|
319 |
script.write(" if [ -d %s ]; then\n" % interface_v6_conf)
|
320 |
script.write(" echo 1 > %s/proxy_ndp\n" % interface_v6_conf)
|
321 |
script.write(" echo 1 > %s/forwarding\n" % interface_v6_conf)
|
322 |
script.write(" fi\n")
|
323 |
script.write("fi\n\n")
|
324 |
# As much as we'd like to put this in our _ROOT_DIR, that will happen to be
|
325 |
# mounted noexec sometimes, so we'll have to find another place.
|
326 |
(tmpfd, tmpfile_name) = tempfile.mkstemp() |
327 |
tmpfile = os.fdopen(tmpfd, 'w')
|
328 |
try:
|
329 |
tmpfile.write(script.getvalue()) |
330 |
finally:
|
331 |
tmpfile.close() |
332 |
os.chmod(tmpfile_name, 0755)
|
333 |
return tmpfile_name
|
334 |
|
335 |
def ListInstances(self): |
336 |
"""Get the list of running instances.
|
337 |
|
338 |
We can do this by listing our live instances directory and
|
339 |
checking whether the associated kvm process is still alive.
|
340 |
|
341 |
"""
|
342 |
result = [] |
343 |
for name in os.listdir(self._PIDS_DIR): |
344 |
if self._InstancePidAlive(name)[2]: |
345 |
result.append(name) |
346 |
return result
|
347 |
|
348 |
def GetInstanceInfo(self, instance_name): |
349 |
"""Get instance properties.
|
350 |
|
351 |
@type instance_name: string
|
352 |
@param instance_name: the instance name
|
353 |
@rtype: tuple of strings
|
354 |
@return: (name, id, memory, vcpus, stat, times)
|
355 |
|
356 |
"""
|
357 |
_, pid, alive = self._InstancePidAlive(instance_name)
|
358 |
if not alive: |
359 |
return None |
360 |
|
361 |
_, memory, vcpus = self._InstancePidInfo(pid)
|
362 |
stat = "---b-"
|
363 |
times = "0"
|
364 |
|
365 |
return (instance_name, pid, memory, vcpus, stat, times)
|
366 |
|
367 |
def GetAllInstancesInfo(self): |
368 |
"""Get properties of all instances.
|
369 |
|
370 |
@return: list of tuples (name, id, memory, vcpus, stat, times)
|
371 |
|
372 |
"""
|
373 |
data = [] |
374 |
for name in os.listdir(self._PIDS_DIR): |
375 |
try:
|
376 |
info = self.GetInstanceInfo(name)
|
377 |
except errors.HypervisorError:
|
378 |
continue
|
379 |
if info:
|
380 |
data.append(info) |
381 |
return data
|
382 |
|
383 |
def _GenerateKVMRuntime(self, instance, block_devices): |
384 |
"""Generate KVM information to start an instance.
|
385 |
|
386 |
"""
|
387 |
pidfile = self._InstancePidFile(instance.name)
|
388 |
kvm = constants.KVM_PATH |
389 |
kvm_cmd = [kvm] |
390 |
# used just by the vnc server, if enabled
|
391 |
kvm_cmd.extend(['-name', instance.name])
|
392 |
kvm_cmd.extend(['-m', instance.beparams[constants.BE_MEMORY]])
|
393 |
kvm_cmd.extend(['-smp', instance.beparams[constants.BE_VCPUS]])
|
394 |
kvm_cmd.extend(['-pidfile', pidfile])
|
395 |
kvm_cmd.extend(['-daemonize'])
|
396 |
if not instance.hvparams[constants.HV_ACPI]: |
397 |
kvm_cmd.extend(['-no-acpi'])
|
398 |
|
399 |
hvp = instance.hvparams |
400 |
boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK |
401 |
boot_cdrom = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_CDROM |
402 |
boot_network = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_NETWORK |
403 |
|
404 |
if hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED:
|
405 |
kvm_cmd.extend(["-enable-kvm"])
|
406 |
elif hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_DISABLED:
|
407 |
kvm_cmd.extend(["-disable-kvm"])
|
408 |
|
409 |
if boot_network:
|
410 |
kvm_cmd.extend(['-boot', 'n']) |
411 |
|
412 |
disk_type = hvp[constants.HV_DISK_TYPE] |
413 |
if disk_type == constants.HT_DISK_PARAVIRTUAL:
|
414 |
if_val = ',if=virtio'
|
415 |
else:
|
416 |
if_val = ',if=%s' % disk_type
|
417 |
# Cache mode
|
418 |
disk_cache = hvp[constants.HV_DISK_CACHE] |
419 |
if disk_cache != constants.HT_CACHE_DEFAULT:
|
420 |
cache_val = ",cache=%s" % disk_cache
|
421 |
else:
|
422 |
cache_val = ""
|
423 |
for cfdev, dev_path in block_devices: |
424 |
if cfdev.mode != constants.DISK_RDWR:
|
425 |
raise errors.HypervisorError("Instance has read-only disks which" |
426 |
" are not supported by KVM")
|
427 |
# TODO: handle FD_LOOP and FD_BLKTAP (?)
|
428 |
if boot_disk:
|
429 |
kvm_cmd.extend(['-boot', 'c']) |
430 |
if disk_type != constants.HT_DISK_IDE:
|
431 |
boot_val = ',boot=on'
|
432 |
else:
|
433 |
boot_val = ''
|
434 |
# We only boot from the first disk
|
435 |
boot_disk = False
|
436 |
else:
|
437 |
boot_val = ''
|
438 |
|
439 |
drive_val = 'file=%s,format=raw%s%s%s' % (dev_path, if_val, boot_val,
|
440 |
cache_val) |
441 |
kvm_cmd.extend(['-drive', drive_val])
|
442 |
|
443 |
iso_image = hvp[constants.HV_CDROM_IMAGE_PATH] |
444 |
if iso_image:
|
445 |
options = ',format=raw,media=cdrom'
|
446 |
if boot_cdrom:
|
447 |
kvm_cmd.extend(['-boot', 'd']) |
448 |
if disk_type != constants.HT_DISK_IDE:
|
449 |
options = '%s,boot=on' % options
|
450 |
else:
|
451 |
if disk_type == constants.HT_DISK_PARAVIRTUAL:
|
452 |
if_val = ',if=virtio'
|
453 |
else:
|
454 |
if_val = ',if=%s' % disk_type
|
455 |
options = '%s%s' % (options, if_val)
|
456 |
drive_val = 'file=%s%s' % (iso_image, options)
|
457 |
kvm_cmd.extend(['-drive', drive_val])
|
458 |
|
459 |
kernel_path = hvp[constants.HV_KERNEL_PATH] |
460 |
if kernel_path:
|
461 |
kvm_cmd.extend(['-kernel', kernel_path])
|
462 |
initrd_path = hvp[constants.HV_INITRD_PATH] |
463 |
if initrd_path:
|
464 |
kvm_cmd.extend(['-initrd', initrd_path])
|
465 |
root_append = ['root=%s' % hvp[constants.HV_ROOT_PATH],
|
466 |
hvp[constants.HV_KERNEL_ARGS]] |
467 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
468 |
root_append.append('console=ttyS0,38400')
|
469 |
kvm_cmd.extend(['-append', ' '.join(root_append)]) |
470 |
|
471 |
mouse_type = hvp[constants.HV_USB_MOUSE] |
472 |
if mouse_type:
|
473 |
kvm_cmd.extend(['-usb'])
|
474 |
kvm_cmd.extend(['-usbdevice', mouse_type])
|
475 |
|
476 |
vnc_bind_address = hvp[constants.HV_VNC_BIND_ADDRESS] |
477 |
if vnc_bind_address:
|
478 |
if utils.IsValidIP(vnc_bind_address):
|
479 |
if instance.network_port > constants.VNC_BASE_PORT:
|
480 |
display = instance.network_port - constants.VNC_BASE_PORT |
481 |
if vnc_bind_address == '0.0.0.0': |
482 |
vnc_arg = ':%d' % (display)
|
483 |
else:
|
484 |
vnc_arg = '%s:%d' % (vnc_bind_address, display)
|
485 |
else:
|
486 |
logging.error("Network port is not a valid VNC display (%d < %d)."
|
487 |
" Not starting VNC", instance.network_port,
|
488 |
constants.VNC_BASE_PORT) |
489 |
vnc_arg = 'none'
|
490 |
|
491 |
# Only allow tls and other option when not binding to a file, for now.
|
492 |
# kvm/qemu gets confused otherwise about the filename to use.
|
493 |
vnc_append = ''
|
494 |
if hvp[constants.HV_VNC_TLS]:
|
495 |
vnc_append = '%s,tls' % vnc_append
|
496 |
if hvp[constants.HV_VNC_X509_VERIFY]:
|
497 |
vnc_append = '%s,x509verify=%s' % (vnc_append,
|
498 |
hvp[constants.HV_VNC_X509]) |
499 |
elif hvp[constants.HV_VNC_X509]:
|
500 |
vnc_append = '%s,x509=%s' % (vnc_append,
|
501 |
hvp[constants.HV_VNC_X509]) |
502 |
if hvp[constants.HV_VNC_PASSWORD_FILE]:
|
503 |
vnc_append = '%s,password' % vnc_append
|
504 |
|
505 |
vnc_arg = '%s%s' % (vnc_arg, vnc_append)
|
506 |
|
507 |
else:
|
508 |
vnc_arg = 'unix:%s/%s.vnc' % (vnc_bind_address, instance.name)
|
509 |
|
510 |
kvm_cmd.extend(['-vnc', vnc_arg])
|
511 |
|
512 |
# Also add a tablet USB device to act as a mouse
|
513 |
# This solves various mouse alignment issues
|
514 |
kvm_cmd.extend(['-usbdevice', 'tablet']) |
515 |
else:
|
516 |
kvm_cmd.extend(['-nographic'])
|
517 |
|
518 |
monitor_dev = ("unix:%s,server,nowait" %
|
519 |
self._InstanceMonitor(instance.name))
|
520 |
kvm_cmd.extend(['-monitor', monitor_dev])
|
521 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
522 |
serial_dev = ('unix:%s,server,nowait' %
|
523 |
self._InstanceSerial(instance.name))
|
524 |
kvm_cmd.extend(['-serial', serial_dev])
|
525 |
else:
|
526 |
kvm_cmd.extend(['-serial', 'none']) |
527 |
|
528 |
if hvp[constants.HV_USE_LOCALTIME]:
|
529 |
kvm_cmd.extend(['-localtime'])
|
530 |
|
531 |
# Save the current instance nics, but defer their expansion as parameters,
|
532 |
# as we'll need to generate executable temp files for them.
|
533 |
kvm_nics = instance.nics |
534 |
hvparams = hvp |
535 |
|
536 |
return (kvm_cmd, kvm_nics, hvparams)
|
537 |
|
538 |
def _WriteKVMRuntime(self, instance_name, data): |
539 |
"""Write an instance's KVM runtime
|
540 |
|
541 |
"""
|
542 |
try:
|
543 |
utils.WriteFile(self._InstanceKVMRuntime(instance_name),
|
544 |
data=data) |
545 |
except EnvironmentError, err: |
546 |
raise errors.HypervisorError("Failed to save KVM runtime file: %s" % err) |
547 |
|
548 |
def _ReadKVMRuntime(self, instance_name): |
549 |
"""Read an instance's KVM runtime
|
550 |
|
551 |
"""
|
552 |
try:
|
553 |
file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
|
554 |
except EnvironmentError, err: |
555 |
raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err) |
556 |
return file_content
|
557 |
|
558 |
def _SaveKVMRuntime(self, instance, kvm_runtime): |
559 |
"""Save an instance's KVM runtime
|
560 |
|
561 |
"""
|
562 |
kvm_cmd, kvm_nics, hvparams = kvm_runtime |
563 |
serialized_nics = [nic.ToDict() for nic in kvm_nics] |
564 |
serialized_form = serializer.Dump((kvm_cmd, serialized_nics, hvparams)) |
565 |
self._WriteKVMRuntime(instance.name, serialized_form)
|
566 |
|
567 |
def _LoadKVMRuntime(self, instance, serialized_runtime=None): |
568 |
"""Load an instance's KVM runtime
|
569 |
|
570 |
"""
|
571 |
if not serialized_runtime: |
572 |
serialized_runtime = self._ReadKVMRuntime(instance.name)
|
573 |
loaded_runtime = serializer.Load(serialized_runtime) |
574 |
kvm_cmd, serialized_nics, hvparams = loaded_runtime |
575 |
kvm_nics = [objects.NIC.FromDict(snic) for snic in serialized_nics] |
576 |
return (kvm_cmd, kvm_nics, hvparams)
|
577 |
|
578 |
def _RunKVMCmd(self, name, kvm_cmd): |
579 |
"""Run the KVM cmd and check for errors
|
580 |
|
581 |
@type name: string
|
582 |
@param name: instance name
|
583 |
@type kvm_cmd: list of strings
|
584 |
@param kvm_cmd: runcmd input for kvm
|
585 |
|
586 |
"""
|
587 |
result = utils.RunCmd(kvm_cmd) |
588 |
if result.failed:
|
589 |
raise errors.HypervisorError("Failed to start instance %s: %s (%s)" % |
590 |
(name, result.fail_reason, result.output)) |
591 |
if not self._InstancePidAlive(name)[2]: |
592 |
raise errors.HypervisorError("Failed to start instance %s" % name) |
593 |
|
594 |
def _ExecuteKVMRuntime(self, instance, kvm_runtime, incoming=None): |
595 |
"""Execute a KVM cmd, after completing it with some last minute data
|
596 |
|
597 |
@type incoming: tuple of strings
|
598 |
@param incoming: (target_host_ip, port)
|
599 |
|
600 |
"""
|
601 |
hvp = instance.hvparams |
602 |
name = instance.name |
603 |
self._CheckDown(name)
|
604 |
|
605 |
temp_files = [] |
606 |
|
607 |
kvm_cmd, kvm_nics, hvparams = kvm_runtime |
608 |
|
609 |
security_model = hvp[constants.HV_SECURITY_MODEL] |
610 |
if security_model == constants.HT_SM_USER:
|
611 |
kvm_cmd.extend(["-runas", hvp[constants.HV_SECURITY_DOMAIN]])
|
612 |
|
613 |
if not kvm_nics: |
614 |
kvm_cmd.extend(['-net', 'none']) |
615 |
else:
|
616 |
nic_type = hvparams[constants.HV_NIC_TYPE] |
617 |
if nic_type == constants.HT_NIC_PARAVIRTUAL:
|
618 |
nic_model = "model=virtio"
|
619 |
else:
|
620 |
nic_model = "model=%s" % nic_type
|
621 |
|
622 |
for nic_seq, nic in enumerate(kvm_nics): |
623 |
nic_val = "nic,vlan=%s,macaddr=%s,%s" % (nic_seq, nic.mac, nic_model)
|
624 |
script = self._WriteNetScript(instance, nic_seq, nic)
|
625 |
kvm_cmd.extend(['-net', nic_val])
|
626 |
kvm_cmd.extend(['-net', 'tap,vlan=%s,script=%s' % (nic_seq, script)]) |
627 |
temp_files.append(script) |
628 |
|
629 |
if incoming:
|
630 |
target, port = incoming |
631 |
kvm_cmd.extend(['-incoming', 'tcp:%s:%s' % (target, port)]) |
632 |
|
633 |
vnc_pwd_file = hvp[constants.HV_VNC_PASSWORD_FILE] |
634 |
vnc_pwd = None
|
635 |
if vnc_pwd_file:
|
636 |
try:
|
637 |
vnc_pwd = utils.ReadFile(vnc_pwd_file) |
638 |
except EnvironmentError, err: |
639 |
raise errors.HypervisorError("Failed to open VNC password file %s: %s" |
640 |
% (vnc_pwd_file, err)) |
641 |
|
642 |
if security_model == constants.HT_SM_POOL:
|
643 |
ss = ssconf.SimpleStore() |
644 |
uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\n")
|
645 |
all_uids = set(uidpool.ExpandUidPool(uid_pool))
|
646 |
uid = uidpool.RequestUnusedUid(all_uids) |
647 |
try:
|
648 |
username = pwd.getpwuid(uid.GetUid()).pw_name |
649 |
kvm_cmd.extend(["-runas", username])
|
650 |
self._RunKVMCmd(name, kvm_cmd)
|
651 |
except:
|
652 |
uidpool.ReleaseUid(uid) |
653 |
raise
|
654 |
else:
|
655 |
uid.Unlock() |
656 |
utils.WriteFile(self._InstanceUidFile(name), data=str(uid)) |
657 |
else:
|
658 |
self._RunKVMCmd(name, kvm_cmd)
|
659 |
|
660 |
if vnc_pwd:
|
661 |
change_cmd = 'change vnc password %s' % vnc_pwd
|
662 |
self._CallMonitorCommand(instance.name, change_cmd)
|
663 |
|
664 |
for filename in temp_files: |
665 |
utils.RemoveFile(filename) |
666 |
|
667 |
def StartInstance(self, instance, block_devices): |
668 |
"""Start an instance.
|
669 |
|
670 |
"""
|
671 |
self._CheckDown(instance.name)
|
672 |
kvm_runtime = self._GenerateKVMRuntime(instance, block_devices)
|
673 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
674 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
675 |
|
676 |
def _CallMonitorCommand(self, instance_name, command): |
677 |
"""Invoke a command on the instance monitor.
|
678 |
|
679 |
"""
|
680 |
socat = ("echo %s | %s STDIO UNIX-CONNECT:%s" %
|
681 |
(utils.ShellQuote(command), |
682 |
constants.SOCAT_PATH, |
683 |
utils.ShellQuote(self._InstanceMonitor(instance_name))))
|
684 |
result = utils.RunCmd(socat) |
685 |
if result.failed:
|
686 |
msg = ("Failed to send command '%s' to instance %s."
|
687 |
" output: %s, error: %s, fail_reason: %s" %
|
688 |
(command, instance_name, |
689 |
result.stdout, result.stderr, result.fail_reason)) |
690 |
raise errors.HypervisorError(msg)
|
691 |
|
692 |
return result
|
693 |
|
694 |
def StopInstance(self, instance, force=False, retry=False, name=None): |
695 |
"""Stop an instance.
|
696 |
|
697 |
"""
|
698 |
if name is not None and not force: |
699 |
raise errors.HypervisorError("Cannot shutdown cleanly by name only") |
700 |
if name is None: |
701 |
name = instance.name |
702 |
acpi = instance.hvparams[constants.HV_ACPI] |
703 |
else:
|
704 |
acpi = False
|
705 |
_, pid, alive = self._InstancePidAlive(name)
|
706 |
if pid > 0 and alive: |
707 |
if force or not acpi: |
708 |
utils.KillProcess(pid) |
709 |
else:
|
710 |
self._CallMonitorCommand(name, 'system_powerdown') |
711 |
|
712 |
def CleanupInstance(self, instance_name): |
713 |
"""Cleanup after a stopped instance
|
714 |
|
715 |
"""
|
716 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
717 |
if pid > 0 and alive: |
718 |
raise errors.HypervisorError("Cannot cleanup a live instance") |
719 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
720 |
|
721 |
def RebootInstance(self, instance): |
722 |
"""Reboot an instance.
|
723 |
|
724 |
"""
|
725 |
# For some reason if we do a 'send-key ctrl-alt-delete' to the control
|
726 |
# socket the instance will stop, but now power up again. So we'll resort
|
727 |
# to shutdown and restart.
|
728 |
_, _, alive = self._InstancePidAlive(instance.name)
|
729 |
if not alive: |
730 |
raise errors.HypervisorError("Failed to reboot instance %s:" |
731 |
" not running" % instance.name)
|
732 |
# StopInstance will delete the saved KVM runtime so:
|
733 |
# ...first load it...
|
734 |
kvm_runtime = self._LoadKVMRuntime(instance)
|
735 |
# ...now we can safely call StopInstance...
|
736 |
if not self.StopInstance(instance): |
737 |
self.StopInstance(instance, force=True) |
738 |
# ...and finally we can save it again, and execute it...
|
739 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
740 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
741 |
|
742 |
def MigrationInfo(self, instance): |
743 |
"""Get instance information to perform a migration.
|
744 |
|
745 |
@type instance: L{objects.Instance}
|
746 |
@param instance: instance to be migrated
|
747 |
@rtype: string
|
748 |
@return: content of the KVM runtime file
|
749 |
|
750 |
"""
|
751 |
return self._ReadKVMRuntime(instance.name) |
752 |
|
753 |
def AcceptInstance(self, instance, info, target): |
754 |
"""Prepare to accept an instance.
|
755 |
|
756 |
@type instance: L{objects.Instance}
|
757 |
@param instance: instance to be accepted
|
758 |
@type info: string
|
759 |
@param info: content of the KVM runtime file on the source node
|
760 |
@type target: string
|
761 |
@param target: target host (usually ip), on this node
|
762 |
|
763 |
"""
|
764 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
765 |
incoming_address = (target, instance.hvparams[constants.HV_MIGRATION_PORT]) |
766 |
self._ExecuteKVMRuntime(instance, kvm_runtime, incoming=incoming_address)
|
767 |
|
768 |
def FinalizeMigration(self, instance, info, success): |
769 |
"""Finalize an instance migration.
|
770 |
|
771 |
Stop the incoming mode KVM.
|
772 |
|
773 |
@type instance: L{objects.Instance}
|
774 |
@param instance: instance whose migration is being aborted
|
775 |
|
776 |
"""
|
777 |
if success:
|
778 |
self._WriteKVMRuntime(instance.name, info)
|
779 |
else:
|
780 |
self.StopInstance(instance, force=True) |
781 |
|
782 |
def MigrateInstance(self, instance, target, live): |
783 |
"""Migrate an instance to a target node.
|
784 |
|
785 |
The migration will not be attempted if the instance is not
|
786 |
currently running.
|
787 |
|
788 |
@type instance: L{objects.Instance}
|
789 |
@param instance: the instance to be migrated
|
790 |
@type target: string
|
791 |
@param target: ip address of the target node
|
792 |
@type live: boolean
|
793 |
@param live: perform a live migration
|
794 |
|
795 |
"""
|
796 |
instance_name = instance.name |
797 |
port = instance.hvparams[constants.HV_MIGRATION_PORT] |
798 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
799 |
if not alive: |
800 |
raise errors.HypervisorError("Instance not running, cannot migrate") |
801 |
|
802 |
if not utils.TcpPing(target, port, live_port_needed=True): |
803 |
raise errors.HypervisorError("Remote host %s not listening on port" |
804 |
" %s, cannot migrate" % (target, port))
|
805 |
|
806 |
if not live: |
807 |
self._CallMonitorCommand(instance_name, 'stop') |
808 |
|
809 |
migrate_command = 'migrate -d tcp:%s:%s' % (target, port)
|
810 |
self._CallMonitorCommand(instance_name, migrate_command)
|
811 |
|
812 |
info_command = 'info migrate'
|
813 |
done = False
|
814 |
broken_answers = 0
|
815 |
while not done: |
816 |
result = self._CallMonitorCommand(instance_name, info_command)
|
817 |
match = self._MIGRATION_STATUS_RE.search(result.stdout)
|
818 |
if not match: |
819 |
broken_answers += 1
|
820 |
if not result.stdout: |
821 |
logging.info("KVM: empty 'info migrate' result")
|
822 |
else:
|
823 |
logging.warning("KVM: unknown 'info migrate' result: %s",
|
824 |
result.stdout) |
825 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
826 |
else:
|
827 |
status = match.group(1)
|
828 |
if status == 'completed': |
829 |
done = True
|
830 |
elif status == 'active': |
831 |
# reset the broken answers count
|
832 |
broken_answers = 0
|
833 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
834 |
elif status == 'failed' or status == 'cancelled': |
835 |
if not live: |
836 |
self._CallMonitorCommand(instance_name, 'cont') |
837 |
raise errors.HypervisorError("Migration %s at the kvm level" % |
838 |
status) |
839 |
else:
|
840 |
logging.warning("KVM: unknown migration status '%s'", status)
|
841 |
broken_answers += 1
|
842 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
843 |
if broken_answers >= self._MIGRATION_INFO_MAX_BAD_ANSWERS: |
844 |
raise errors.HypervisorError("Too many 'info migrate' broken answers") |
845 |
|
846 |
utils.KillProcess(pid) |
847 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
848 |
|
849 |
def GetNodeInfo(self): |
850 |
"""Return information about the node.
|
851 |
|
852 |
This is just a wrapper over the base GetLinuxNodeInfo method.
|
853 |
|
854 |
@return: a dict with the following keys (values in MiB):
|
855 |
- memory_total: the total memory size on the node
|
856 |
- memory_free: the available memory on the node for instances
|
857 |
- memory_dom0: the memory used by the node itself, if available
|
858 |
|
859 |
"""
|
860 |
return self.GetLinuxNodeInfo() |
861 |
|
862 |
@classmethod
|
863 |
def GetShellCommandForConsole(cls, instance, hvparams, beparams): |
864 |
"""Return a command for connecting to the console of an instance.
|
865 |
|
866 |
"""
|
867 |
if hvparams[constants.HV_SERIAL_CONSOLE]:
|
868 |
shell_command = ("%s STDIO,%s UNIX-CONNECT:%s" %
|
869 |
(constants.SOCAT_PATH, cls._SocatUnixConsoleParams(), |
870 |
utils.ShellQuote(cls._InstanceSerial(instance.name)))) |
871 |
else:
|
872 |
shell_command = "echo 'No serial shell for instance %s'" % instance.name
|
873 |
|
874 |
vnc_bind_address = hvparams[constants.HV_VNC_BIND_ADDRESS] |
875 |
if vnc_bind_address:
|
876 |
if instance.network_port > constants.VNC_BASE_PORT:
|
877 |
display = instance.network_port - constants.VNC_BASE_PORT |
878 |
vnc_command = ("echo 'Instance has VNC listening on %s:%d"
|
879 |
" (display: %d)'" % (vnc_bind_address,
|
880 |
instance.network_port, |
881 |
display)) |
882 |
shell_command = "%s; %s" % (vnc_command, shell_command)
|
883 |
|
884 |
return shell_command
|
885 |
|
886 |
def Verify(self): |
887 |
"""Verify the hypervisor.
|
888 |
|
889 |
Check that the binary exists.
|
890 |
|
891 |
"""
|
892 |
if not os.path.exists(constants.KVM_PATH): |
893 |
return "The kvm binary ('%s') does not exist." % constants.KVM_PATH |
894 |
if not os.path.exists(constants.SOCAT_PATH): |
895 |
return "The socat binary ('%s') does not exist." % constants.SOCAT_PATH |
896 |
|
897 |
|
898 |
@classmethod
|
899 |
def CheckParameterSyntax(cls, hvparams): |
900 |
"""Check the given parameters for validity.
|
901 |
|
902 |
@type hvparams: dict
|
903 |
@param hvparams: dictionary with parameter names/value
|
904 |
@raise errors.HypervisorError: when a parameter is not valid
|
905 |
|
906 |
"""
|
907 |
super(KVMHypervisor, cls).CheckParameterSyntax(hvparams)
|
908 |
|
909 |
kernel_path = hvparams[constants.HV_KERNEL_PATH] |
910 |
if kernel_path:
|
911 |
if not hvparams[constants.HV_ROOT_PATH]: |
912 |
raise errors.HypervisorError("Need a root partition for the instance," |
913 |
" if a kernel is defined")
|
914 |
|
915 |
if (hvparams[constants.HV_VNC_X509_VERIFY] and |
916 |
not hvparams[constants.HV_VNC_X509]):
|
917 |
raise errors.HypervisorError("%s must be defined, if %s is" % |
918 |
(constants.HV_VNC_X509, |
919 |
constants.HV_VNC_X509_VERIFY)) |
920 |
|
921 |
boot_order = hvparams[constants.HV_BOOT_ORDER] |
922 |
if (boot_order == constants.HT_BO_CDROM and |
923 |
not hvparams[constants.HV_CDROM_IMAGE_PATH]):
|
924 |
raise errors.HypervisorError("Cannot boot from cdrom without an" |
925 |
" ISO path")
|
926 |
|
927 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
928 |
if security_model == constants.HT_SM_USER:
|
929 |
if not hvparams[constants.HV_SECURITY_DOMAIN]: |
930 |
raise errors.HypervisorError("A security domain (user to run kvm as)" |
931 |
" must be specified")
|
932 |
elif (security_model == constants.HT_SM_NONE or |
933 |
security_model == constants.HT_SM_POOL): |
934 |
if hvparams[constants.HV_SECURITY_DOMAIN]:
|
935 |
raise errors.HypervisorError("Cannot have a security domain when the" |
936 |
" security model is 'none' or 'pool'")
|
937 |
|
938 |
@classmethod
|
939 |
def ValidateParameters(cls, hvparams): |
940 |
"""Check the given parameters for validity.
|
941 |
|
942 |
@type hvparams: dict
|
943 |
@param hvparams: dictionary with parameter names/value
|
944 |
@raise errors.HypervisorError: when a parameter is not valid
|
945 |
|
946 |
"""
|
947 |
super(KVMHypervisor, cls).ValidateParameters(hvparams)
|
948 |
|
949 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
950 |
if security_model == constants.HT_SM_USER:
|
951 |
username = hvparams[constants.HV_SECURITY_DOMAIN] |
952 |
try:
|
953 |
pwd.getpwnam(username) |
954 |
except KeyError: |
955 |
raise errors.HypervisorError("Unknown security domain user %s" |
956 |
% username) |
957 |
|
958 |
@classmethod
|
959 |
def PowercycleNode(cls): |
960 |
"""KVM powercycle, just a wrapper over Linux powercycle.
|
961 |
|
962 |
"""
|
963 |
cls.LinuxPowercycle() |