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Ganeti
ganeti :: hypervisor :: hv_lxc :: LXCHypervisor :: Class LXCHypervisor
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Class LXCHypervisor

source code

LXC-based virtualization.

TODO:

Problems/issues:

Instance Methods [hide private]
 
__init__(self)
x.__init__(...) initializes x; see help(type(x)) for signature		 source code
 
ListInstances(self)
Get the list of running instances.		 source code
tuple of strings
GetInstanceInfo(self, instance_name)
Get instance properties.		 source code
 
GetAllInstancesInfo(self)
Get properties of all instances.		 source code
 
_CreateConfigFile(self, instance, root_dir)
Create an lxc.conf file for an instance.		 source code
 
StartInstance(self, instance, block_devices, startup_paused)
Start an instance.		 source code
 
StopInstance(self, instance, force=False, retry=False, name=None, timeout=None)
Stop an instance.		 source code
 
RebootInstance(self, instance)
Reboot an instance.		 source code
 
BalloonInstanceMemory(self, instance, mem)
Balloon an instance memory to a certain value.		 source code
 
GetNodeInfo(self)
Return information about the node.		 source code
 
Verify(self)
Verify the hypervisor.		 source code
 
MigrateInstance(self, instance, target, live)
Migrate an instance.		 source code
objects.MigrationStatus
GetMigrationStatus(self, instance)
Get the migration status		 source code

Inherited from hv_base.BaseHypervisor: AcceptInstance, CleanupInstance, FinalizeMigrationDst, FinalizeMigrationSource, MigrationInfo

Inherited from hv_base.BaseHypervisor (private): _InstanceStartupMemory

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Methods [hide private]
 
_InstanceDir(cls, instance_name)
Return the root directory for an instance.		 source code
 
_InstanceConfFile(cls, instance_name)
Return the configuration file for an instance.		 source code
 
_InstanceLogFile(cls, instance_name)
Return the log file for an instance.		 source code
 
_GetCgroupMountPoint(cls) source code
 
_GetCgroupCpuList(cls, instance_name)
Return the list of CPU ids for an instance.		 source code
 
_GetCgroupMemoryLimit(cls, instance_name)
Return the memory limit for an instance		 source code
 
GetInstanceConsole(cls, instance, hvparams, beparams)
Return a command for connecting to the console of an instance.		 source code
 
PowercycleNode(cls)
LXC powercycle, just a wrapper over Linux powercycle.		 source code

Inherited from hv_base.BaseHypervisor: CheckParameterSyntax, GetAncillaryFiles, LinuxPowercycle, ValidateParameters

Static Methods [hide private]
 
_GetMountSubdirs(path)
Return the list of mountpoints under a given path.		 source code

Inherited from hv_base.BaseHypervisor: GetLinuxNodeInfo

Inherited from hv_base.BaseHypervisor (private): _FormatVerifyResults

Class Variables [hide private]
  _ROOT_DIR = pathutils.RUN_DIR+ "/lxc"
  _DEVS = ["c 1:3", "c 1:5", "c 1:7", "c 1:8", "c 1:9", "c 1:10"...
  _DENIED_CAPABILITIES = ["mac_override", "sys_boot", "sys_modul...
  _DIR_MODE = 0755
  PARAMETERS = {constants.HV_CPU_MASK: hv_base.OPT_CPU_MASK_CHECK,}
a dict of parameter name: check type; the check type is a five-tuple containing:

Inherited from hv_base.BaseHypervisor: ANCILLARY_FILES, ANCILLARY_FILES_OPT, CAN_MIGRATE

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self)
(Constructor)

source code 

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__
(inherited documentation)

ListInstances(self)

source code 

Get the list of running instances.

Overrides: hv_base.BaseHypervisor.ListInstances

GetInstanceInfo(self, instance_name)

source code 

Get instance properties.

Parameters:
  • instance_name (string) - the instance name
Returns: tuple of strings
(name, id, memory, vcpus, stat, times)
Overrides: hv_base.BaseHypervisor.GetInstanceInfo

GetAllInstancesInfo(self)

source code 

Get properties of all instances.

Returns:
[(name, id, memory, vcpus, stat, times),...]
Overrides: hv_base.BaseHypervisor.GetAllInstancesInfo

StartInstance(self, instance, block_devices, startup_paused)

source code 

Start an instance.

For LXC, we try to mount the block device and execute 'lxc-start'. We use volatile containers.

Overrides: hv_base.BaseHypervisor.StartInstance

StopInstance(self, instance, force=False, retry=False, name=None, timeout=None)

source code 

Stop an instance.

This method has complicated cleanup tests, as we must:

  • try to kill all leftover processes
  • try to unmount any additional sub-mountpoints
  • finally unmount the instance dir
Parameters:
  • instance - instance to stop
  • force - whether to do a "hard" stop (destroy)
  • retry - whether this is just a retry call
  • name - if this parameter is passed, the the instance object should not be used (will be passed as None), and the shutdown must be done by name only
  • timeout - if the parameter is not None, a soft shutdown operation will be killed after the specified number of seconds. A hard (forced) shutdown cannot have a timeout
Overrides: hv_base.BaseHypervisor.StopInstance

RebootInstance(self, instance)

source code 

Reboot an instance.

This is not (yet) implemented (in Ganeti) for the LXC hypervisor.

Overrides: hv_base.BaseHypervisor.RebootInstance

BalloonInstanceMemory(self, instance, mem)

source code 

Balloon an instance memory to a certain value.

Parameters:
  • instance (objects.Instance) - instance to be accepted
  • mem (int) - actual memory size to use for instance runtime
Overrides: hv_base.BaseHypervisor.BalloonInstanceMemory

GetNodeInfo(self)

source code 

Return information about the node.

This is just a wrapper over the base GetLinuxNodeInfo method.

Returns:
a dict with the following keys (values in MiB):
  • memory_total: the total memory size on the node
  • memory_free: the available memory on the node for instances
  • memory_dom0: the memory used by the node itself, if available
Overrides: hv_base.BaseHypervisor.GetNodeInfo

GetInstanceConsole(cls, instance, hvparams, beparams)
Class Method

source code 

Return a command for connecting to the console of an instance.

Overrides: hv_base.BaseHypervisor.GetInstanceConsole

Verify(self)

source code 

Verify the hypervisor.

For the LXC manager, it just checks the existence of the base dir.

Returns:
Problem description if something is wrong, None otherwise
Overrides: hv_base.BaseHypervisor.Verify

PowercycleNode(cls)
Class Method

source code 

LXC powercycle, just a wrapper over Linux powercycle.

Overrides: hv_base.BaseHypervisor.PowercycleNode

MigrateInstance(self, instance, target, live)

source code 

Migrate an instance.

Parameters:
  • instance (objects.Instance) - the instance to be migrated
  • target (string) - hostname (usually ip) of the target node
  • live (boolean) - whether to do a live or non-live migration
Overrides: hv_base.BaseHypervisor.MigrateInstance

GetMigrationStatus(self, instance)

source code 

Get the migration status

Parameters:
Returns: objects.MigrationStatus
the status of the current migration (one of constants.HV_MIGRATION_VALID_STATUSES), plus any additional progress info that can be retrieved from the hypervisor
Overrides: hv_base.BaseHypervisor.GetMigrationStatus

Class Variable Details [hide private]

_DEVS

Value:
["c 1:3", "c 1:5", "c 1:7", "c 1:8", "c 1:9", "c 1:10", "c 5:0", "c 5:\
1", "c 5:2", "c 136:*",]

_DENIED_CAPABILITIES

Value:
["mac_override", "sys_boot", "sys_module", "sys_time",]

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