4 # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Google Inc.
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.
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.
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
27 from cStringIO import StringIO
29 from ganeti import constants
30 from ganeti import errors
31 from ganeti import utils
32 from ganeti.hypervisor import hv_base
33 from ganeti import netutils
34 from ganeti import objects
35 from ganeti import pathutils
36 from ganeti import vcluster
37 from ganeti import ssconf
40 XEND_CONFIG_FILE = vcluster.AddNodePrefix("/etc/xen/xend-config.sxp")
41 XL_CONFIG_FILE = vcluster.AddNodePrefix("/etc/xen/xl.conf")
42 VIF_BRIDGE_SCRIPT = vcluster.AddNodePrefix("/etc/xen/scripts/vif-bridge")
43 _DOM0_NAME = "Domain-0"
46 class XenHypervisor(hv_base.BaseHypervisor):
47 """Xen generic hypervisor interface
49 This is the Xen base class used for both Xen PVM and HVM. It contains
50 all the functionality that is identical for both.
54 REBOOT_RETRY_COUNT = 60
55 REBOOT_RETRY_INTERVAL = 10
62 ANCILLARY_FILES_OPT = [
67 def _ConfigFileName(instance_name):
68 """Get the config file name for an instance.
70 @param instance_name: instance name
71 @type instance_name: str
72 @return: fully qualified path to instance config file
76 return "/etc/xen/%s" % instance_name
79 def _WriteConfigFile(cls, instance, startup_memory, block_devices):
80 """Write the Xen config file for the instance.
83 raise NotImplementedError
86 def _WriteConfigFileStatic(instance_name, data):
87 """Write the Xen config file for the instance.
89 This version of the function just writes the config file from static data.
92 # just in case it exists
93 utils.RemoveFile("/etc/xen/auto/%s" % instance_name)
94 cfg_file = XenHypervisor._ConfigFileName(instance_name)
96 utils.WriteFile(cfg_file, data=data)
97 except EnvironmentError, err:
98 raise errors.HypervisorError("Cannot write Xen instance configuration"
99 " file %s: %s" % (cfg_file, err))
102 def _ReadConfigFile(instance_name):
103 """Returns the contents of the instance config file.
107 file_content = utils.ReadFile(
108 XenHypervisor._ConfigFileName(instance_name))
109 except EnvironmentError, err:
110 raise errors.HypervisorError("Failed to load Xen config file: %s" % err)
114 def _RemoveConfigFile(instance_name):
115 """Remove the xen configuration file.
118 utils.RemoveFile(XenHypervisor._ConfigFileName(instance_name))
121 def _CreateConfigCpus(cls, cpu_mask):
122 """Create a CPU config string that's compatible with Xen's
126 # Convert the string CPU mask to a list of list of int's
127 cpu_list = utils.ParseMultiCpuMask(cpu_mask)
129 if len(cpu_list) == 1:
130 all_cpu_mapping = cpu_list[0]
131 if all_cpu_mapping == constants.CPU_PINNING_OFF:
132 # If CPU pinning has 1 entry that's "all", then remove the
133 # parameter from the config file
136 # If CPU pinning has one non-all entry, mapping all vCPUS (the entire
137 # VM) to one physical CPU, using format 'cpu = "C"'
138 return "cpu = \"%s\"" % ",".join(map(str, all_cpu_mapping))
141 def _GetCPUMap(vcpu):
142 if vcpu[0] == constants.CPU_PINNING_ALL_VAL:
143 cpu_map = constants.CPU_PINNING_ALL_XEN
145 cpu_map = ",".join(map(str, vcpu))
146 return "\"%s\"" % cpu_map
148 # build the result string in format 'cpus = [ "c", "c", "c" ]',
149 # where each c is a physical CPU number, a range, a list, or any
151 return "cpus = [ %s ]" % ", ".join(map(_GetCPUMap, cpu_list))
154 def _RunXmList(xmlist_errors):
155 """Helper function for L{_GetXMList} to run "xm list".
158 result = utils.RunCmd([constants.XEN_CMD, "list"])
160 logging.error("xm list failed (%s): %s", result.fail_reason,
162 xmlist_errors.append(result)
163 raise utils.RetryAgain()
165 # skip over the heading
166 return result.stdout.splitlines()[1:]
169 def _GetXMList(cls, include_node):
170 """Return the list of running instances.
172 If the include_node argument is True, then we return information
173 for dom0 also, otherwise we filter that from the return value.
175 @return: list of (name, id, memory, vcpus, state, time spent)
180 lines = utils.Retry(cls._RunXmList, 1, 5, args=(xmlist_errors, ))
181 except utils.RetryTimeout:
183 xmlist_result = xmlist_errors.pop()
185 errmsg = ("xm list failed, timeout exceeded (%s): %s" %
186 (xmlist_result.fail_reason, xmlist_result.output))
188 errmsg = "xm list failed"
190 raise errors.HypervisorError(errmsg)
194 # The format of lines is:
195 # Name ID Mem(MiB) VCPUs State Time(s)
196 # Domain-0 0 3418 4 r----- 266.2
199 raise errors.HypervisorError("Can't parse output of xm list,"
202 data[1] = int(data[1])
203 data[2] = int(data[2])
204 data[3] = int(data[3])
205 data[5] = float(data[5])
206 except (TypeError, ValueError), err:
207 raise errors.HypervisorError("Can't parse output of xm list,"
208 " line: %s, error: %s" % (line, err))
210 # skip the Domain-0 (optional)
211 if include_node or data[0] != _DOM0_NAME:
216 def ListInstances(self):
217 """Get the list of running instances.
220 xm_list = self._GetXMList(False)
221 names = [info[0] for info in xm_list]
224 def GetInstanceInfo(self, instance_name):
225 """Get instance properties.
227 @param instance_name: the instance name
229 @return: tuple (name, id, memory, vcpus, stat, times)
232 xm_list = self._GetXMList(instance_name == _DOM0_NAME)
235 if data[0] == instance_name:
240 def GetAllInstancesInfo(self):
241 """Get properties of all instances.
243 @return: list of tuples (name, id, memory, vcpus, stat, times)
246 xm_list = self._GetXMList(False)
249 def StartInstance(self, instance, block_devices, startup_paused):
250 """Start an instance.
253 startup_memory = self._InstanceStartupMemory(instance)
254 self._WriteConfigFile(instance, startup_memory, block_devices)
255 cmd = [constants.XEN_CMD, "create"]
258 cmd.extend([self._ConfigFileName(instance.name)])
259 result = utils.RunCmd(cmd)
262 raise errors.HypervisorError("Failed to start instance %s: %s (%s)" %
263 (instance.name, result.fail_reason,
266 def StopInstance(self, instance, force=False, retry=False, name=None):
272 self._RemoveConfigFile(name)
274 command = [constants.XEN_CMD, "destroy", name]
276 command = [constants.XEN_CMD, "shutdown", name]
277 result = utils.RunCmd(command)
280 raise errors.HypervisorError("Failed to stop instance %s: %s, %s" %
281 (name, result.fail_reason, result.output))
283 def RebootInstance(self, instance):
284 """Reboot an instance.
287 ini_info = self.GetInstanceInfo(instance.name)
290 raise errors.HypervisorError("Failed to reboot instance %s,"
291 " not running" % instance.name)
293 result = utils.RunCmd([constants.XEN_CMD, "reboot", instance.name])
295 raise errors.HypervisorError("Failed to reboot instance %s: %s, %s" %
296 (instance.name, result.fail_reason,
299 def _CheckInstance():
300 new_info = self.GetInstanceInfo(instance.name)
302 # check if the domain ID has changed or the run time has decreased
303 if (new_info is not None and
304 (new_info[1] != ini_info[1] or new_info[5] < ini_info[5])):
307 raise utils.RetryAgain()
310 utils.Retry(_CheckInstance, self.REBOOT_RETRY_INTERVAL,
311 self.REBOOT_RETRY_INTERVAL * self.REBOOT_RETRY_COUNT)
312 except utils.RetryTimeout:
313 raise errors.HypervisorError("Failed to reboot instance %s: instance"
314 " did not reboot in the expected interval" %
317 def BalloonInstanceMemory(self, instance, mem):
318 """Balloon an instance memory to a certain value.
320 @type instance: L{objects.Instance}
321 @param instance: instance to be accepted
323 @param mem: actual memory size to use for instance runtime
326 cmd = [constants.XEN_CMD, "mem-set", instance.name, mem]
327 result = utils.RunCmd(cmd)
329 raise errors.HypervisorError("Failed to balloon instance %s: %s (%s)" %
330 (instance.name, result.fail_reason,
332 cmd = ["sed", "-ie", "s/^memory.*$/memory = %s/" % mem]
333 cmd.append(XenHypervisor._ConfigFileName(instance.name))
334 result = utils.RunCmd(cmd)
336 raise errors.HypervisorError("Failed to update memory for %s: %s (%s)" %
337 (instance.name, result.fail_reason,
340 def GetNodeInfo(self):
341 """Return information about the node.
343 @return: a dict with the following keys (memory values in MiB):
344 - memory_total: the total memory size on the node
345 - memory_free: the available memory on the node for instances
346 - memory_dom0: the memory used by the node itself, if available
347 - nr_cpus: total number of CPUs
348 - nr_nodes: in a NUMA system, the number of domains
349 - nr_sockets: the number of physical CPU sockets in the node
350 - hv_version: the hypervisor version in the form (major, minor)
353 result = utils.RunCmd([constants.XEN_CMD, "info"])
355 logging.error("Can't run 'xm info' (%s): %s", result.fail_reason,
359 xmoutput = result.stdout.splitlines()
361 cores_per_socket = threads_per_core = nr_cpus = None
362 xen_major, xen_minor = None, None
366 for line in xmoutput:
367 splitfields = line.split(":", 1)
369 if len(splitfields) > 1:
370 key = splitfields[0].strip()
371 val = splitfields[1].strip()
373 # note: in xen 3, memory has changed to total_memory
374 if key == "memory" or key == "total_memory":
375 memory_total = int(val)
376 elif key == "free_memory":
377 memory_free = int(val)
378 elif key == "nr_cpus":
379 nr_cpus = result["cpu_total"] = int(val)
380 elif key == "nr_nodes":
381 result["cpu_nodes"] = int(val)
382 elif key == "cores_per_socket":
383 cores_per_socket = int(val)
384 elif key == "threads_per_core":
385 threads_per_core = int(val)
386 elif key == "xen_major":
388 elif key == "xen_minor":
391 if None not in [cores_per_socket, threads_per_core, nr_cpus]:
392 result["cpu_sockets"] = nr_cpus / (cores_per_socket * threads_per_core)
395 for (name, _, mem, vcpus, _, _) in self._GetXMList(True):
396 if name == _DOM0_NAME:
397 result["memory_dom0"] = mem
398 result["dom0_cpus"] = vcpus
400 # Include Dom0 in total memory usage
403 if memory_free is not None:
404 result["memory_free"] = memory_free
406 if memory_total is not None:
407 result["memory_total"] = memory_total
409 # Calculate memory used by hypervisor
410 if None not in [memory_total, memory_free, total_instmem]:
411 result["memory_hv"] = memory_total - memory_free - total_instmem
413 if not (xen_major is None or xen_minor is None):
414 result[constants.HV_NODEINFO_KEY_VERSION] = (xen_major, xen_minor)
419 def GetInstanceConsole(cls, instance, hvparams, beparams):
420 """Return a command for connecting to the console of an instance.
423 return objects.InstanceConsole(instance=instance.name,
424 kind=constants.CONS_SSH,
425 host=instance.primary_node,
426 user=constants.SSH_CONSOLE_USER,
427 command=[pathutils.XEN_CONSOLE_WRAPPER,
428 constants.XEN_CMD, instance.name])
431 """Verify the hypervisor.
433 For Xen, this verifies that the xend process is running.
436 result = utils.RunCmd([constants.XEN_CMD, "info"])
438 return "'xm info' failed: %s, %s" % (result.fail_reason, result.output)
441 def _GetConfigFileDiskData(block_devices, blockdev_prefix):
442 """Get disk directive for xen config file.
444 This method builds the xen config disk directive according to the
445 given disk_template and block_devices.
447 @param block_devices: list of tuples (cfdev, rldev):
448 - cfdev: dict containing ganeti config disk part
449 - rldev: ganeti.bdev.BlockDev object
450 @param blockdev_prefix: a string containing blockdevice prefix,
451 e.g. "sd" for /dev/sda
453 @return: string containing disk directive for xen instance config file
457 constants.FD_LOOP: "file",
458 constants.FD_BLKTAP: "tap:aio",
461 if len(block_devices) > 24:
463 raise errors.HypervisorError("Too many disks")
464 namespace = [blockdev_prefix + chr(i + ord("a")) for i in range(24)]
465 for sd_name, (cfdev, dev_path) in zip(namespace, block_devices):
466 if cfdev.mode == constants.DISK_RDWR:
470 if cfdev.dev_type == constants.LD_FILE:
471 line = "'%s:%s,%s,%s'" % (FILE_DRIVER_MAP[cfdev.physical_id[0]],
472 dev_path, sd_name, mode)
474 line = "'phy:%s,%s,%s'" % (dev_path, sd_name, mode)
475 disk_data.append(line)
479 def MigrationInfo(self, instance):
480 """Get instance information to perform a migration.
482 @type instance: L{objects.Instance}
483 @param instance: instance to be migrated
485 @return: content of the xen config file
488 return self._ReadConfigFile(instance.name)
490 def AcceptInstance(self, instance, info, target):
491 """Prepare to accept an instance.
493 @type instance: L{objects.Instance}
494 @param instance: instance to be accepted
496 @param info: content of the xen config file on the source node
498 @param target: target host (usually ip), on this node
503 def FinalizeMigrationDst(self, instance, info, success):
504 """Finalize an instance migration.
506 After a successful migration we write the xen config file.
507 We do nothing on a failure, as we did not change anything at accept time.
509 @type instance: L{objects.Instance}
510 @param instance: instance whose migration is being finalized
512 @param info: content of the xen config file on the source node
513 @type success: boolean
514 @param success: whether the migration was a success or a failure
518 self._WriteConfigFileStatic(instance.name, info)
520 def MigrateInstance(self, instance, target, live):
521 """Migrate an instance to a target node.
523 The migration will not be attempted if the instance is not
526 @type instance: L{objects.Instance}
527 @param instance: the instance to be migrated
529 @param target: ip address of the target node
531 @param live: perform a live migration
534 if self.GetInstanceInfo(instance.name) is None:
535 raise errors.HypervisorError("Instance not running, cannot migrate")
537 port = instance.hvparams[constants.HV_MIGRATION_PORT]
539 if (constants.XEN_CMD == constants.XEN_CMD_XM and
540 not netutils.TcpPing(target, port, live_port_needed=True)):
541 raise errors.HypervisorError("Remote host %s not listening on port"
542 " %s, cannot migrate" % (target, port))
544 args = [constants.XEN_CMD, "migrate"]
545 if constants.XEN_CMD == constants.XEN_CMD_XM:
546 args.extend(["-p", "%d" % port])
549 elif constants.XEN_CMD == constants.XEN_CMD_XL:
550 cluster_name = ssconf.SimpleStore().GetClusterName()
551 args.extend(["-s", constants.XL_SSH_CMD % cluster_name])
552 args.extend(["-C", self._ConfigFileName(instance.name)])
554 raise errors.HypervisorError("Unsupported xen command: %s" %
557 args.extend([instance.name, target])
558 result = utils.RunCmd(args)
560 raise errors.HypervisorError("Failed to migrate instance %s: %s" %
561 (instance.name, result.output))
563 def FinalizeMigrationSource(self, instance, success, live):
564 """Finalize the instance migration on the source node.
566 @type instance: L{objects.Instance}
567 @param instance: the instance that was migrated
569 @param success: whether the migration succeeded or not
571 @param live: whether the user requested a live migration or not
574 # pylint: disable=W0613
576 # remove old xen file after migration succeeded
578 self._RemoveConfigFile(instance.name)
579 except EnvironmentError:
580 logging.exception("Failure while removing instance config file")
582 def GetMigrationStatus(self, instance):
583 """Get the migration status
585 As MigrateInstance for Xen is still blocking, if this method is called it
586 means that MigrateInstance has completed successfully. So we can safely
587 assume that the migration was successful and notify this fact to the client.
589 @type instance: L{objects.Instance}
590 @param instance: the instance that is being migrated
591 @rtype: L{objects.MigrationStatus}
592 @return: the status of the current migration (one of
593 L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
594 progress info that can be retrieved from the hypervisor
597 return objects.MigrationStatus(status=constants.HV_MIGRATION_COMPLETED)
600 def PowercycleNode(cls):
601 """Xen-specific powercycle.
603 This first does a Linux reboot (which triggers automatically a Xen
604 reboot), and if that fails it tries to do a Xen reboot. The reason
605 we don't try a Xen reboot first is that the xen reboot launches an
606 external command which connects to the Xen hypervisor, and that
607 won't work in case the root filesystem is broken and/or the xend
608 daemon is not working.
612 cls.LinuxPowercycle()
614 utils.RunCmd([constants.XEN_CMD, "debug", "R"])
617 class XenPvmHypervisor(XenHypervisor):
618 """Xen PVM hypervisor interface"""
621 constants.HV_USE_BOOTLOADER: hv_base.NO_CHECK,
622 constants.HV_BOOTLOADER_PATH: hv_base.OPT_FILE_CHECK,
623 constants.HV_BOOTLOADER_ARGS: hv_base.NO_CHECK,
624 constants.HV_KERNEL_PATH: hv_base.REQ_FILE_CHECK,
625 constants.HV_INITRD_PATH: hv_base.OPT_FILE_CHECK,
626 constants.HV_ROOT_PATH: hv_base.NO_CHECK,
627 constants.HV_KERNEL_ARGS: hv_base.NO_CHECK,
628 constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK,
629 constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK,
630 # TODO: Add a check for the blockdev prefix (matching [a-z:] or similar).
631 constants.HV_BLOCKDEV_PREFIX: hv_base.NO_CHECK,
632 constants.HV_REBOOT_BEHAVIOR:
633 hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS),
634 constants.HV_CPU_MASK: hv_base.OPT_MULTI_CPU_MASK_CHECK,
635 constants.HV_CPU_CAP: hv_base.NO_CHECK,
636 constants.HV_CPU_WEIGHT:
637 (False, lambda x: 0 < x < 65536, "invalid weight", None, None),
641 def _WriteConfigFile(cls, instance, startup_memory, block_devices):
642 """Write the Xen config file for the instance.
645 hvp = instance.hvparams
647 config.write("# this is autogenerated by Ganeti, please do not edit\n#\n")
649 # if bootloader is True, use bootloader instead of kernel and ramdisk
651 if hvp[constants.HV_USE_BOOTLOADER]:
652 # bootloader handling
653 bootloader_path = hvp[constants.HV_BOOTLOADER_PATH]
655 config.write("bootloader = '%s'\n" % bootloader_path)
657 raise errors.HypervisorError("Bootloader enabled, but missing"
660 bootloader_args = hvp[constants.HV_BOOTLOADER_ARGS]
662 config.write("bootargs = '%s'\n" % bootloader_args)
665 kpath = hvp[constants.HV_KERNEL_PATH]
666 config.write("kernel = '%s'\n" % kpath)
669 initrd_path = hvp[constants.HV_INITRD_PATH]
671 config.write("ramdisk = '%s'\n" % initrd_path)
673 # rest of the settings
674 config.write("memory = %d\n" % startup_memory)
675 config.write("maxmem = %d\n" % instance.beparams[constants.BE_MAXMEM])
676 config.write("vcpus = %d\n" % instance.beparams[constants.BE_VCPUS])
677 cpu_pinning = cls._CreateConfigCpus(hvp[constants.HV_CPU_MASK])
679 config.write("%s\n" % cpu_pinning)
680 cpu_cap = hvp[constants.HV_CPU_CAP]
682 config.write("cpu_cap=%d\n" % cpu_cap)
683 cpu_weight = hvp[constants.HV_CPU_WEIGHT]
685 config.write("cpu_weight=%d\n" % cpu_weight)
687 config.write("name = '%s'\n" % instance.name)
690 for nic in instance.nics:
691 nic_str = "mac=%s" % (nic.mac)
692 ip = getattr(nic, "ip", None)
694 nic_str += ", ip=%s" % ip
695 if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
696 nic_str += ", bridge=%s" % nic.nicparams[constants.NIC_LINK]
697 vif_data.append("'%s'" % nic_str)
699 disk_data = cls._GetConfigFileDiskData(block_devices,
700 hvp[constants.HV_BLOCKDEV_PREFIX])
702 config.write("vif = [%s]\n" % ",".join(vif_data))
703 config.write("disk = [%s]\n" % ",".join(disk_data))
705 if hvp[constants.HV_ROOT_PATH]:
706 config.write("root = '%s'\n" % hvp[constants.HV_ROOT_PATH])
707 config.write("on_poweroff = 'destroy'\n")
708 if hvp[constants.HV_REBOOT_BEHAVIOR] == constants.INSTANCE_REBOOT_ALLOWED:
709 config.write("on_reboot = 'restart'\n")
711 config.write("on_reboot = 'destroy'\n")
712 config.write("on_crash = 'restart'\n")
713 config.write("extra = '%s'\n" % hvp[constants.HV_KERNEL_ARGS])
714 cls._WriteConfigFileStatic(instance.name, config.getvalue())
719 class XenHvmHypervisor(XenHypervisor):
720 """Xen HVM hypervisor interface"""
722 ANCILLARY_FILES = XenHypervisor.ANCILLARY_FILES + [
723 pathutils.VNC_PASSWORD_FILE,
725 ANCILLARY_FILES_OPT = XenHypervisor.ANCILLARY_FILES_OPT + [
726 pathutils.VNC_PASSWORD_FILE,
730 constants.HV_ACPI: hv_base.NO_CHECK,
731 constants.HV_BOOT_ORDER: (True, ) +
732 (lambda x: x and len(x.strip("acdn")) == 0,
733 "Invalid boot order specified, must be one or more of [acdn]",
735 constants.HV_CDROM_IMAGE_PATH: hv_base.OPT_FILE_CHECK,
736 constants.HV_DISK_TYPE:
737 hv_base.ParamInSet(True, constants.HT_HVM_VALID_DISK_TYPES),
738 constants.HV_NIC_TYPE:
739 hv_base.ParamInSet(True, constants.HT_HVM_VALID_NIC_TYPES),
740 constants.HV_PAE: hv_base.NO_CHECK,
741 constants.HV_VNC_BIND_ADDRESS:
742 (False, netutils.IP4Address.IsValid,
743 "VNC bind address is not a valid IP address", None, None),
744 constants.HV_KERNEL_PATH: hv_base.REQ_FILE_CHECK,
745 constants.HV_DEVICE_MODEL: hv_base.REQ_FILE_CHECK,
746 constants.HV_VNC_PASSWORD_FILE: hv_base.REQ_FILE_CHECK,
747 constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK,
748 constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK,
749 constants.HV_USE_LOCALTIME: hv_base.NO_CHECK,
750 # TODO: Add a check for the blockdev prefix (matching [a-z:] or similar).
751 constants.HV_BLOCKDEV_PREFIX: hv_base.NO_CHECK,
752 # Add PCI passthrough
753 constants.HV_PASSTHROUGH: hv_base.NO_CHECK,
754 constants.HV_REBOOT_BEHAVIOR:
755 hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS),
756 constants.HV_CPU_MASK: hv_base.OPT_MULTI_CPU_MASK_CHECK,
757 constants.HV_CPU_CAP: hv_base.NO_CHECK,
758 constants.HV_CPU_WEIGHT:
759 (False, lambda x: 0 < x < 65535, "invalid weight", None, None),
763 def _WriteConfigFile(cls, instance, startup_memory, block_devices):
764 """Create a Xen 3.1 HVM config file.
767 hvp = instance.hvparams
770 config.write("# this is autogenerated by Ganeti, please do not edit\n#\n")
773 kpath = hvp[constants.HV_KERNEL_PATH]
774 config.write("kernel = '%s'\n" % kpath)
776 config.write("builder = 'hvm'\n")
777 config.write("memory = %d\n" % startup_memory)
778 config.write("maxmem = %d\n" % instance.beparams[constants.BE_MAXMEM])
779 config.write("vcpus = %d\n" % instance.beparams[constants.BE_VCPUS])
780 cpu_pinning = cls._CreateConfigCpus(hvp[constants.HV_CPU_MASK])
782 config.write("%s\n" % cpu_pinning)
783 cpu_cap = hvp[constants.HV_CPU_CAP]
785 config.write("cpu_cap=%d\n" % cpu_cap)
786 cpu_weight = hvp[constants.HV_CPU_WEIGHT]
788 config.write("cpu_weight=%d\n" % cpu_weight)
790 config.write("name = '%s'\n" % instance.name)
791 if hvp[constants.HV_PAE]:
792 config.write("pae = 1\n")
794 config.write("pae = 0\n")
795 if hvp[constants.HV_ACPI]:
796 config.write("acpi = 1\n")
798 config.write("acpi = 0\n")
799 config.write("apic = 1\n")
800 config.write("device_model = '%s'\n" % hvp[constants.HV_DEVICE_MODEL])
801 config.write("boot = '%s'\n" % hvp[constants.HV_BOOT_ORDER])
802 config.write("sdl = 0\n")
803 config.write("usb = 1\n")
804 config.write("usbdevice = 'tablet'\n")
805 config.write("vnc = 1\n")
806 if hvp[constants.HV_VNC_BIND_ADDRESS] is None:
807 config.write("vnclisten = '%s'\n" % constants.VNC_DEFAULT_BIND_ADDRESS)
809 config.write("vnclisten = '%s'\n" % hvp[constants.HV_VNC_BIND_ADDRESS])
811 if instance.network_port > constants.VNC_BASE_PORT:
812 display = instance.network_port - constants.VNC_BASE_PORT
813 config.write("vncdisplay = %s\n" % display)
814 config.write("vncunused = 0\n")
816 config.write("# vncdisplay = 1\n")
817 config.write("vncunused = 1\n")
819 vnc_pwd_file = hvp[constants.HV_VNC_PASSWORD_FILE]
821 password = utils.ReadFile(vnc_pwd_file)
822 except EnvironmentError, err:
823 raise errors.HypervisorError("Failed to open VNC password file %s: %s" %
826 config.write("vncpasswd = '%s'\n" % password.rstrip())
828 config.write("serial = 'pty'\n")
829 if hvp[constants.HV_USE_LOCALTIME]:
830 config.write("localtime = 1\n")
833 nic_type = hvp[constants.HV_NIC_TYPE]
835 # ensure old instances don't change
836 nic_type_str = ", type=ioemu"
837 elif nic_type == constants.HT_NIC_PARAVIRTUAL:
838 nic_type_str = ", type=paravirtualized"
840 nic_type_str = ", model=%s, type=ioemu" % nic_type
841 for nic in instance.nics:
842 nic_str = "mac=%s%s" % (nic.mac, nic_type_str)
843 ip = getattr(nic, "ip", None)
845 nic_str += ", ip=%s" % ip
846 if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
847 nic_str += ", bridge=%s" % nic.nicparams[constants.NIC_LINK]
848 vif_data.append("'%s'" % nic_str)
850 config.write("vif = [%s]\n" % ",".join(vif_data))
852 disk_data = cls._GetConfigFileDiskData(block_devices,
853 hvp[constants.HV_BLOCKDEV_PREFIX])
855 iso_path = hvp[constants.HV_CDROM_IMAGE_PATH]
857 iso = "'file:%s,hdc:cdrom,r'" % iso_path
858 disk_data.append(iso)
860 config.write("disk = [%s]\n" % (",".join(disk_data)))
861 # Add PCI passthrough
863 pci_pass = hvp[constants.HV_PASSTHROUGH]
865 pci_pass_arr = pci_pass.split(";")
866 config.write("pci = %s\n" % pci_pass_arr)
867 config.write("on_poweroff = 'destroy'\n")
868 if hvp[constants.HV_REBOOT_BEHAVIOR] == constants.INSTANCE_REBOOT_ALLOWED:
869 config.write("on_reboot = 'restart'\n")
871 config.write("on_reboot = 'destroy'\n")
872 config.write("on_crash = 'restart'\n")
873 cls._WriteConfigFileStatic(instance.name, config.getvalue())