from ganeti import objects
+XEND_CONFIG_FILE = "/etc/xen/xend-config.sxp"
+XL_CONFIG_FILE = "/etc/xen/xl.conf"
+VIF_BRIDGE_SCRIPT = "/etc/xen/scripts/vif-bridge"
+_DOM0_NAME = "Domain-0"
+
+
class XenHypervisor(hv_base.BaseHypervisor):
"""Xen generic hypervisor interface
REBOOT_RETRY_INTERVAL = 10
ANCILLARY_FILES = [
- '/etc/xen/xend-config.sxp',
- '/etc/xen/scripts/vif-bridge',
+ XEND_CONFIG_FILE,
+ XL_CONFIG_FILE,
+ VIF_BRIDGE_SCRIPT,
]
+ ANCILLARY_FILES_OPT = [
+ XL_CONFIG_FILE,
+ ]
+
+ @staticmethod
+ def _ConfigFileName(instance_name):
+ """Get the config file name for an instance.
+
+ @param instance_name: instance name
+ @type instance_name: str
+ @return: fully qualified path to instance config file
+ @rtype: str
+
+ """
+ return "/etc/xen/%s" % instance_name
@classmethod
- def _WriteConfigFile(cls, instance, block_devices):
+ def _WriteConfigFile(cls, instance, startup_memory, block_devices):
"""Write the Xen config file for the instance.
"""
This version of the function just writes the config file from static data.
"""
- utils.WriteFile("/etc/xen/%s" % instance_name, data=data)
+ utils.WriteFile(XenHypervisor._ConfigFileName(instance_name), data=data)
@staticmethod
def _ReadConfigFile(instance_name):
"""
try:
- file_content = utils.ReadFile("/etc/xen/%s" % instance_name)
+ file_content = utils.ReadFile(
+ XenHypervisor._ConfigFileName(instance_name))
except EnvironmentError, err:
raise errors.HypervisorError("Failed to load Xen config file: %s" % err)
return file_content
"""Remove the xen configuration file.
"""
- utils.RemoveFile("/etc/xen/%s" % instance_name)
+ utils.RemoveFile(XenHypervisor._ConfigFileName(instance_name))
+
+ @classmethod
+ def _CreateConfigCpus(cls, cpu_mask):
+ """Create a CPU config string that's compatible with Xen's
+ configuration file.
+
+ """
+ # Convert the string CPU mask to a list of list of int's
+ cpu_list = utils.ParseMultiCpuMask(cpu_mask)
+
+ if len(cpu_list) == 1:
+ all_cpu_mapping = cpu_list[0]
+ if all_cpu_mapping == constants.CPU_PINNING_OFF:
+ # If CPU pinning has 1 entry that's "all", then remove the
+ # parameter from the config file
+ return None
+ else:
+ # If CPU pinning has one non-all entry, mapping all vCPUS (the entire
+ # VM) to one physical CPU, using format 'cpu = "C"'
+ return "cpu = \"%s\"" % ",".join(map(str, all_cpu_mapping))
+ else:
+ def _GetCPUMap(vcpu):
+ if vcpu[0] == constants.CPU_PINNING_ALL_VAL:
+ cpu_map = constants.CPU_PINNING_ALL_XEN
+ else:
+ cpu_map = ",".join(map(str, vcpu))
+ return "\"%s\"" % cpu_map
+
+ # build the result string in format 'cpus = [ "c", "c", "c" ]',
+ # where each c is a physical CPU number, a range, a list, or any
+ # combination
+ return "cpus = [ %s ]" % ", ".join(map(_GetCPUMap, cpu_list))
@staticmethod
def _RunXmList(xmlist_errors):
"""Helper function for L{_GetXMList} to run "xm list".
"""
- result = utils.RunCmd(["xm", "list"])
+ result = utils.RunCmd([constants.XEN_CMD, "list"])
if result.failed:
logging.error("xm list failed (%s): %s", result.fail_reason,
result.output)
" line: %s, error: %s" % (line, err))
# skip the Domain-0 (optional)
- if include_node or data[0] != 'Domain-0':
+ if include_node or data[0] != _DOM0_NAME:
result.append(data)
return result
@return: tuple (name, id, memory, vcpus, stat, times)
"""
- xm_list = self._GetXMList(instance_name=="Domain-0")
+ xm_list = self._GetXMList(instance_name == _DOM0_NAME)
result = None
for data in xm_list:
if data[0] == instance_name:
xm_list = self._GetXMList(False)
return xm_list
- def StartInstance(self, instance, block_devices):
+ def StartInstance(self, instance, block_devices, startup_paused):
"""Start an instance.
"""
- self._WriteConfigFile(instance, block_devices)
- result = utils.RunCmd(["xm", "create", instance.name])
+ startup_memory = self._InstanceStartupMemory(instance)
+ self._WriteConfigFile(instance, startup_memory, block_devices)
+ cmd = [constants.XEN_CMD, "create"]
+ if startup_paused:
+ cmd.extend(["-p"])
+ cmd.extend([self._ConfigFileName(instance.name)])
+ result = utils.RunCmd(cmd)
if result.failed:
raise errors.HypervisorError("Failed to start instance %s: %s (%s)" %
name = instance.name
self._RemoveConfigFile(name)
if force:
- command = ["xm", "destroy", name]
+ command = [constants.XEN_CMD, "destroy", name]
else:
- command = ["xm", "shutdown", name]
+ command = [constants.XEN_CMD, "shutdown", name]
result = utils.RunCmd(command)
if result.failed:
raise errors.HypervisorError("Failed to reboot instance %s,"
" not running" % instance.name)
- result = utils.RunCmd(["xm", "reboot", instance.name])
+ result = utils.RunCmd([constants.XEN_CMD, "reboot", instance.name])
if result.failed:
raise errors.HypervisorError("Failed to reboot instance %s: %s, %s" %
(instance.name, result.fail_reason,
" did not reboot in the expected interval" %
(instance.name, ))
+ def BalloonInstanceMemory(self, instance, mem):
+ """Balloon an instance memory to a certain value.
+
+ @type instance: L{objects.Instance}
+ @param instance: instance to be accepted
+ @type mem: int
+ @param mem: actual memory size to use for instance runtime
+
+ """
+ cmd = [constants.XEN_CMD, "mem-set", instance.name, mem]
+ result = utils.RunCmd(cmd)
+ if result.failed:
+ raise errors.HypervisorError("Failed to balloon instance %s: %s (%s)" %
+ (instance.name, result.fail_reason,
+ result.output))
+ cmd = ["sed", "-ie", "s/^memory.*$/memory = %s/" % mem]
+ cmd.append(XenHypervisor._ConfigFileName(instance.name))
+ result = utils.RunCmd(cmd)
+ if result.failed:
+ raise errors.HypervisorError("Failed to update memory for %s: %s (%s)" %
+ (instance.name, result.fail_reason,
+ result.output))
+
def GetNodeInfo(self):
"""Return information about the node.
- nr_cpus: total number of CPUs
- nr_nodes: in a NUMA system, the number of domains
- nr_sockets: the number of physical CPU sockets in the node
+ - hv_version: the hypervisor version in the form (major, minor)
"""
- # note: in xen 3, memory has changed to total_memory
- result = utils.RunCmd(["xm", "info"])
+ result = utils.RunCmd([constants.XEN_CMD, "info"])
if result.failed:
logging.error("Can't run 'xm info' (%s): %s", result.fail_reason,
result.output)
xmoutput = result.stdout.splitlines()
result = {}
cores_per_socket = threads_per_core = nr_cpus = None
+ xen_major, xen_minor = None, None
+ memory_total = None
+ memory_free = None
+
for line in xmoutput:
splitfields = line.split(":", 1)
if len(splitfields) > 1:
key = splitfields[0].strip()
val = splitfields[1].strip()
- if key == 'memory' or key == 'total_memory':
- result['memory_total'] = int(val)
- elif key == 'free_memory':
- result['memory_free'] = int(val)
- elif key == 'nr_cpus':
- nr_cpus = result['cpu_total'] = int(val)
- elif key == 'nr_nodes':
- result['cpu_nodes'] = int(val)
- elif key == 'cores_per_socket':
+
+ # note: in xen 3, memory has changed to total_memory
+ if key == "memory" or key == "total_memory":
+ memory_total = int(val)
+ elif key == "free_memory":
+ memory_free = int(val)
+ elif key == "nr_cpus":
+ nr_cpus = result["cpu_total"] = int(val)
+ elif key == "nr_nodes":
+ result["cpu_nodes"] = int(val)
+ elif key == "cores_per_socket":
cores_per_socket = int(val)
- elif key == 'threads_per_core':
+ elif key == "threads_per_core":
threads_per_core = int(val)
+ elif key == "xen_major":
+ xen_major = int(val)
+ elif key == "xen_minor":
+ xen_minor = int(val)
+
+ if None not in [cores_per_socket, threads_per_core, nr_cpus]:
+ result["cpu_sockets"] = nr_cpus / (cores_per_socket * threads_per_core)
+
+ total_instmem = 0
+ for (name, _, mem, vcpus, _, _) in self._GetXMList(True):
+ if name == _DOM0_NAME:
+ result["memory_dom0"] = mem
+ result["dom0_cpus"] = vcpus
+
+ # Include Dom0 in total memory usage
+ total_instmem += mem
- if (cores_per_socket is not None and
- threads_per_core is not None and nr_cpus is not None):
- result['cpu_sockets'] = nr_cpus / (cores_per_socket * threads_per_core)
+ if memory_free is not None:
+ result["memory_free"] = memory_free
- dom0_info = self.GetInstanceInfo("Domain-0")
- if dom0_info is not None:
- result['memory_dom0'] = dom0_info[2]
+ if memory_total is not None:
+ result["memory_total"] = memory_total
+
+ # Calculate memory used by hypervisor
+ if None not in [memory_total, memory_free, total_instmem]:
+ result["memory_hv"] = memory_total - memory_free - total_instmem
+
+ if not (xen_major is None or xen_minor is None):
+ result[constants.HV_NODEINFO_KEY_VERSION] = (xen_major, xen_minor)
return result
kind=constants.CONS_SSH,
host=instance.primary_node,
user=constants.GANETI_RUNAS,
- command=["xm", "console", instance.name])
+ command=[constants.XM_CONSOLE_WRAPPER,
+ instance.name])
def Verify(self):
"""Verify the hypervisor.
For Xen, this verifies that the xend process is running.
"""
- result = utils.RunCmd(["xm", "info"])
+ result = utils.RunCmd([constants.XEN_CMD, "info"])
if result.failed:
return "'xm info' failed: %s, %s" % (result.fail_reason, result.output)
if len(block_devices) > 24:
# 'z' - 'a' = 24
raise errors.HypervisorError("Too many disks")
- namespace = [blockdev_prefix + chr(i + ord('a')) for i in range(24)]
+ namespace = [blockdev_prefix + chr(i + ord("a")) for i in range(24)]
for sd_name, (cfdev, dev_path) in zip(namespace, block_devices):
if cfdev.mode == constants.DISK_RDWR:
mode = "w"
"""
pass
- def FinalizeMigration(self, instance, info, success):
+ def FinalizeMigrationDst(self, instance, info, success):
"""Finalize an instance migration.
After a successful migration we write the xen config file.
raise errors.HypervisorError("Remote host %s not listening on port"
" %s, cannot migrate" % (target, port))
- args = ["xm", "migrate", "-p", "%d" % port]
+ # FIXME: migrate must be upgraded for transitioning to "xl" (xen 4.1).
+ # -l doesn't exist anymore
+ # -p doesn't exist anymore
+ # -C config_file must be passed
+ # ssh must recognize the key of the target host for the migration
+ args = [constants.XEN_CMD, "migrate", "-p", "%d" % port]
if live:
args.append("-l")
args.extend([instance.name, target])
if result.failed:
raise errors.HypervisorError("Failed to migrate instance %s: %s" %
(instance.name, result.output))
- # remove old xen file after migration succeeded
- try:
- self._RemoveConfigFile(instance.name)
- except EnvironmentError:
- logging.exception("Failure while removing instance config file")
+
+ def FinalizeMigrationSource(self, instance, success, live):
+ """Finalize the instance migration on the source node.
+
+ @type instance: L{objects.Instance}
+ @param instance: the instance that was migrated
+ @type success: bool
+ @param success: whether the migration succeeded or not
+ @type live: bool
+ @param live: whether the user requested a live migration or not
+
+ """
+ # pylint: disable=W0613
+ if success:
+ # remove old xen file after migration succeeded
+ try:
+ self._RemoveConfigFile(instance.name)
+ except EnvironmentError:
+ logging.exception("Failure while removing instance config file")
+
+ def GetMigrationStatus(self, instance):
+ """Get the migration status
+
+ As MigrateInstance for Xen is still blocking, if this method is called it
+ means that MigrateInstance has completed successfully. So we can safely
+ assume that the migration was successful and notify this fact to the client.
+
+ @type instance: L{objects.Instance}
+ @param instance: the instance that is being migrated
+ @rtype: L{objects.MigrationStatus}
+ @return: the status of the current migration (one of
+ L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
+ progress info that can be retrieved from the hypervisor
+
+ """
+ return objects.MigrationStatus(status=constants.HV_MIGRATION_COMPLETED)
@classmethod
def PowercycleNode(cls):
try:
cls.LinuxPowercycle()
finally:
- utils.RunCmd(["xm", "debug", "R"])
+ utils.RunCmd([constants.XEN_CMD, "debug", "R"])
class XenPvmHypervisor(XenHypervisor):
constants.HV_INITRD_PATH: hv_base.OPT_FILE_CHECK,
constants.HV_ROOT_PATH: hv_base.NO_CHECK,
constants.HV_KERNEL_ARGS: hv_base.NO_CHECK,
- constants.HV_MIGRATION_PORT: hv_base.NET_PORT_CHECK,
+ constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK,
constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK,
# TODO: Add a check for the blockdev prefix (matching [a-z:] or similar).
constants.HV_BLOCKDEV_PREFIX: hv_base.NO_CHECK,
+ constants.HV_REBOOT_BEHAVIOR:
+ hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS),
+ constants.HV_CPU_MASK: hv_base.OPT_MULTI_CPU_MASK_CHECK,
}
@classmethod
- def _WriteConfigFile(cls, instance, block_devices):
+ def _WriteConfigFile(cls, instance, startup_memory, block_devices):
"""Write the Xen config file for the instance.
"""
config.write("ramdisk = '%s'\n" % initrd_path)
# rest of the settings
- config.write("memory = %d\n" % instance.beparams[constants.BE_MEMORY])
+ config.write("memory = %d\n" % startup_memory)
+ config.write("maxmem = %d\n" % instance.beparams[constants.BE_MAXMEM])
config.write("vcpus = %d\n" % instance.beparams[constants.BE_VCPUS])
+ cpu_pinning = cls._CreateConfigCpus(hvp[constants.HV_CPU_MASK])
+ if cpu_pinning:
+ config.write("%s\n" % cpu_pinning)
+
config.write("name = '%s'\n" % instance.name)
vif_data = []
if hvp[constants.HV_ROOT_PATH]:
config.write("root = '%s'\n" % hvp[constants.HV_ROOT_PATH])
config.write("on_poweroff = 'destroy'\n")
- config.write("on_reboot = 'restart'\n")
+ if hvp[constants.HV_REBOOT_BEHAVIOR] == constants.INSTANCE_REBOOT_ALLOWED:
+ config.write("on_reboot = 'restart'\n")
+ else:
+ config.write("on_reboot = 'destroy'\n")
config.write("on_crash = 'restart'\n")
config.write("extra = '%s'\n" % hvp[constants.HV_KERNEL_ARGS])
# just in case it exists
utils.RemoveFile("/etc/xen/auto/%s" % instance.name)
try:
- utils.WriteFile("/etc/xen/%s" % instance.name, data=config.getvalue())
+ utils.WriteFile(cls._ConfigFileName(instance.name),
+ data=config.getvalue())
except EnvironmentError, err:
raise errors.HypervisorError("Cannot write Xen instance confile"
- " file /etc/xen/%s: %s" %
- (instance.name, err))
+ " file %s: %s" %
+ (cls._ConfigFileName(instance.name), err))
return True
ANCILLARY_FILES = XenHypervisor.ANCILLARY_FILES + [
constants.VNC_PASSWORD_FILE,
]
+ ANCILLARY_FILES_OPT = XenHypervisor.ANCILLARY_FILES_OPT + [
+ constants.VNC_PASSWORD_FILE,
+ ]
PARAMETERS = {
constants.HV_ACPI: hv_base.NO_CHECK,
constants.HV_KERNEL_PATH: hv_base.REQ_FILE_CHECK,
constants.HV_DEVICE_MODEL: hv_base.REQ_FILE_CHECK,
constants.HV_VNC_PASSWORD_FILE: hv_base.REQ_FILE_CHECK,
- constants.HV_MIGRATION_PORT: hv_base.NET_PORT_CHECK,
+ constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK,
constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK,
constants.HV_USE_LOCALTIME: hv_base.NO_CHECK,
# TODO: Add a check for the blockdev prefix (matching [a-z:] or similar).
constants.HV_BLOCKDEV_PREFIX: hv_base.NO_CHECK,
+ constants.HV_REBOOT_BEHAVIOR:
+ hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS),
+ constants.HV_CPU_MASK: hv_base.OPT_MULTI_CPU_MASK_CHECK,
}
@classmethod
- def _WriteConfigFile(cls, instance, block_devices):
+ def _WriteConfigFile(cls, instance, startup_memory, block_devices):
"""Create a Xen 3.1 HVM config file.
"""
config.write("kernel = '%s'\n" % kpath)
config.write("builder = 'hvm'\n")
- config.write("memory = %d\n" % instance.beparams[constants.BE_MEMORY])
+ config.write("memory = %d\n" % startup_memory)
+ config.write("maxmem = %d\n" % instance.beparams[constants.BE_MAXMEM])
config.write("vcpus = %d\n" % instance.beparams[constants.BE_VCPUS])
+ cpu_pinning = cls._CreateConfigCpus(hvp[constants.HV_CPU_MASK])
+ if cpu_pinning:
+ config.write("%s\n" % cpu_pinning)
+
config.write("name = '%s'\n" % instance.name)
if hvp[constants.HV_PAE]:
config.write("pae = 1\n")
config.write("disk = [%s]\n" % (",".join(disk_data)))
config.write("on_poweroff = 'destroy'\n")
- config.write("on_reboot = 'restart'\n")
+ if hvp[constants.HV_REBOOT_BEHAVIOR] == constants.INSTANCE_REBOOT_ALLOWED:
+ config.write("on_reboot = 'restart'\n")
+ else:
+ config.write("on_reboot = 'destroy'\n")
config.write("on_crash = 'restart'\n")
# just in case it exists
utils.RemoveFile("/etc/xen/auto/%s" % instance.name)
try:
- utils.WriteFile("/etc/xen/%s" % instance.name,
+ utils.WriteFile(cls._ConfigFileName(instance.name),
data=config.getvalue())
except EnvironmentError, err:
raise errors.HypervisorError("Cannot write Xen instance confile"
- " file /etc/xen/%s: %s" %
- (instance.name, err))
+ " file %s: %s" %
+ (cls._ConfigFileName(instance.name), err))
return True
projects / ganeti-local / blobdiff